/********************************************************************** string.c - $Author$ created at: Mon Aug 9 17:12:58 JST 1993 Copyright (C) 1993-2007 Yukihiro Matsumoto Copyright (C) 2000 Network Applied Communication Laboratory, Inc. Copyright (C) 2000 Information-technology Promotion Agency, Japan **********************************************************************/ #include "ruby/encoding.h" #include "ruby/re.h" #include "internal.h" #include "encindex.h" #include "probes.h" #include "gc.h" #include "ruby_assert.h" #include "id.h" #include "debug_counter.h" #include "ruby/util.h" #define BEG(no) (regs->beg[(no)]) #define END(no) (regs->end[(no)]) #include #include #include #ifdef HAVE_UNISTD_H #include #endif #if defined HAVE_CRYPT_R # if defined HAVE_CRYPT_H # include # endif #elif !defined HAVE_CRYPT # include "missing/crypt.h" # define HAVE_CRYPT_R 1 #endif #define STRING_ENUMERATORS_WANTARRAY 0 /* next major */ #undef rb_str_new #undef rb_usascii_str_new #undef rb_utf8_str_new #undef rb_enc_str_new #undef rb_str_new_cstr #undef rb_tainted_str_new_cstr #undef rb_usascii_str_new_cstr #undef rb_utf8_str_new_cstr #undef rb_enc_str_new_cstr #undef rb_external_str_new_cstr #undef rb_locale_str_new_cstr #undef rb_str_dup_frozen #undef rb_str_buf_new_cstr #undef rb_str_buf_cat #undef rb_str_buf_cat2 #undef rb_str_cat2 #undef rb_str_cat_cstr #undef rb_fstring_cstr #undef rb_fstring_enc_cstr static VALUE rb_str_clear(VALUE str); VALUE rb_cString; VALUE rb_cSymbol; /* FLAGS of RString * * 1: RSTRING_NOEMBED * 2: STR_SHARED (== ELTS_SHARED) * 2-6: RSTRING_EMBED_LEN (5 bits == 32) * 6: STR_IS_SHARED_M (shared, when RSTRING_NOEMBED==1 && klass==0) * 7: STR_TMPLOCK * 8-9: ENC_CODERANGE (2 bits) * 10-16: ENCODING (7 bits == 128) * 17: RSTRING_FSTR * 18: STR_NOFREE * 19: STR_FAKESTR */ #define RUBY_MAX_CHAR_LEN 16 #define STR_IS_SHARED_M FL_USER6 #define STR_TMPLOCK FL_USER7 #define STR_NOFREE FL_USER18 #define STR_FAKESTR FL_USER19 #define STR_SET_NOEMBED(str) do {\ FL_SET((str), STR_NOEMBED);\ STR_SET_EMBED_LEN((str), 0);\ } while (0) #define STR_SET_EMBED(str) FL_UNSET((str), (STR_NOEMBED|STR_NOFREE)) #define STR_SET_EMBED_LEN(str, n) do { \ long tmp_n = (n);\ RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\ RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\ } while (0) #define STR_SET_LEN(str, n) do { \ if (STR_EMBED_P(str)) {\ STR_SET_EMBED_LEN((str), (n));\ }\ else {\ RSTRING(str)->as.heap.len = (n);\ }\ } while (0) #define STR_DEC_LEN(str) do {\ if (STR_EMBED_P(str)) {\ long n = RSTRING_LEN(str);\ n--;\ STR_SET_EMBED_LEN((str), n);\ }\ else {\ RSTRING(str)->as.heap.len--;\ }\ } while (0) #define TERM_LEN(str) rb_enc_mbminlen(rb_enc_get(str)) #define TERM_FILL(ptr, termlen) do {\ char *const term_fill_ptr = (ptr);\ const int term_fill_len = (termlen);\ *term_fill_ptr = '\0';\ if (UNLIKELY(term_fill_len > 1))\ memset(term_fill_ptr, 0, term_fill_len);\ } while (0) #define RESIZE_CAPA(str,capacity) do {\ const int termlen = TERM_LEN(str);\ RESIZE_CAPA_TERM(str,capacity,termlen);\ } while (0) #define RESIZE_CAPA_TERM(str,capacity,termlen) do {\ if (STR_EMBED_P(str)) {\ if (!STR_EMBEDDABLE_P(capacity, termlen)) {\ char *const tmp = ALLOC_N(char, (size_t)(capacity) + (termlen));\ const long tlen = RSTRING_LEN(str);\ memcpy(tmp, RSTRING_PTR(str), tlen);\ RSTRING(str)->as.heap.ptr = tmp;\ RSTRING(str)->as.heap.len = tlen;\ STR_SET_NOEMBED(str);\ RSTRING(str)->as.heap.aux.capa = (capacity);\ }\ }\ else {\ assert(!FL_TEST((str), STR_SHARED)); \ REALLOC_N(RSTRING(str)->as.heap.ptr, char, (size_t)(capacity) + (termlen));\ RSTRING(str)->as.heap.aux.capa = (capacity);\ }\ } while (0) #define STR_SET_SHARED(str, shared_str) do { \ if (!FL_TEST(str, STR_FAKESTR)) { \ RB_OBJ_WRITE((str), &RSTRING(str)->as.heap.aux.shared, (shared_str)); \ FL_SET((str), STR_SHARED); \ if (RBASIC_CLASS((shared_str)) == 0) /* for CoW-friendliness */ \ FL_SET_RAW((shared_str), STR_IS_SHARED_M); \ } \ } while (0) #define STR_HEAP_PTR(str) (RSTRING(str)->as.heap.ptr) #define STR_HEAP_SIZE(str) ((size_t)RSTRING(str)->as.heap.aux.capa + TERM_LEN(str)) #define STR_ENC_GET(str) get_encoding(str) #if !defined SHARABLE_MIDDLE_SUBSTRING # define SHARABLE_MIDDLE_SUBSTRING 0 #endif #if !SHARABLE_MIDDLE_SUBSTRING #define SHARABLE_SUBSTRING_P(beg, len, end) ((beg) + (len) == (end)) #else #define SHARABLE_SUBSTRING_P(beg, len, end) 1 #endif #define STR_EMBEDDABLE_P(len, termlen) \ ((len) <= RSTRING_EMBED_LEN_MAX + 1 - (termlen)) static VALUE str_replace_shared_without_enc(VALUE str2, VALUE str); static VALUE str_new_shared(VALUE klass, VALUE str); static VALUE str_new_frozen(VALUE klass, VALUE orig); static VALUE str_new_static(VALUE klass, const char *ptr, long len, int encindex); static void str_make_independent_expand(VALUE str, long len, long expand, const int termlen); static inline void str_modifiable(VALUE str); static VALUE rb_str_downcase(int argc, VALUE *argv, VALUE str); static inline void str_make_independent(VALUE str) { long len = RSTRING_LEN(str); int termlen = TERM_LEN(str); str_make_independent_expand((str), len, 0L, termlen); } /* symbols for [up|down|swap]case/capitalize options */ static VALUE sym_ascii, sym_turkic, sym_lithuanian, sym_fold; static rb_encoding * get_actual_encoding(const int encidx, VALUE str) { const unsigned char *q; switch (encidx) { case ENCINDEX_UTF_16: if (RSTRING_LEN(str) < 2) break; q = (const unsigned char *)RSTRING_PTR(str); if (q[0] == 0xFE && q[1] == 0xFF) { return rb_enc_get_from_index(ENCINDEX_UTF_16BE); } if (q[0] == 0xFF && q[1] == 0xFE) { return rb_enc_get_from_index(ENCINDEX_UTF_16LE); } return rb_ascii8bit_encoding(); case ENCINDEX_UTF_32: if (RSTRING_LEN(str) < 4) break; q = (const unsigned char *)RSTRING_PTR(str); if (q[0] == 0 && q[1] == 0 && q[2] == 0xFE && q[3] == 0xFF) { return rb_enc_get_from_index(ENCINDEX_UTF_32BE); } if (q[3] == 0 && q[2] == 0 && q[1] == 0xFE && q[0] == 0xFF) { return rb_enc_get_from_index(ENCINDEX_UTF_32LE); } return rb_ascii8bit_encoding(); } return rb_enc_from_index(encidx); } static rb_encoding * get_encoding(VALUE str) { return get_actual_encoding(ENCODING_GET(str), str); } static void mustnot_broken(VALUE str) { if (is_broken_string(str)) { rb_raise(rb_eArgError, "invalid byte sequence in %s", rb_enc_name(STR_ENC_GET(str))); } } static void mustnot_wchar(VALUE str) { rb_encoding *enc = STR_ENC_GET(str); if (rb_enc_mbminlen(enc) > 1) { rb_raise(rb_eArgError, "wide char encoding: %s", rb_enc_name(enc)); } } static int fstring_cmp(VALUE a, VALUE b); static VALUE register_fstring(VALUE str); const struct st_hash_type rb_fstring_hash_type = { fstring_cmp, rb_str_hash, }; #define BARE_STRING_P(str) (!FL_ANY_RAW(str, FL_TAINT|FL_EXIVAR) && RBASIC_CLASS(str) == rb_cString) static int fstr_update_callback(st_data_t *key, st_data_t *value, st_data_t arg, int existing) { VALUE *fstr = (VALUE *)arg; VALUE str = (VALUE)*key; if (existing) { /* because of lazy sweep, str may be unmarked already and swept * at next time */ if (rb_objspace_garbage_object_p(str)) { *fstr = Qundef; return ST_DELETE; } *fstr = str; return ST_STOP; } else { if (FL_TEST_RAW(str, STR_FAKESTR)) { str = str_new_static(rb_cString, RSTRING(str)->as.heap.ptr, RSTRING(str)->as.heap.len, ENCODING_GET(str)); OBJ_FREEZE_RAW(str); } else { str = str_new_frozen(rb_cString, str); if (STR_SHARED_P(str)) { /* str should not be shared */ /* shared substring */ str_make_independent(str); assert(OBJ_FROZEN(str)); } if (!BARE_STRING_P(str)) { str = str_new_frozen(rb_cString, str); } } RBASIC(str)->flags |= RSTRING_FSTR; *key = *value = *fstr = str; return ST_CONTINUE; } } RUBY_FUNC_EXPORTED VALUE rb_fstring(VALUE str) { VALUE fstr; int bare; Check_Type(str, T_STRING); if (FL_TEST(str, RSTRING_FSTR)) return str; bare = BARE_STRING_P(str); if (STR_EMBED_P(str) && !bare) { OBJ_FREEZE_RAW(str); return str; } fstr = register_fstring(str); if (!bare) { str_replace_shared_without_enc(str, fstr); OBJ_FREEZE_RAW(str); return str; } return fstr; } static VALUE register_fstring(VALUE str) { VALUE ret; st_table *frozen_strings = rb_vm_fstring_table(); do { ret = str; st_update(frozen_strings, (st_data_t)str, fstr_update_callback, (st_data_t)&ret); } while (ret == Qundef); assert(OBJ_FROZEN(ret)); assert(!FL_TEST_RAW(ret, STR_FAKESTR)); assert(!FL_TEST_RAW(ret, FL_EXIVAR)); assert(!FL_TEST_RAW(ret, FL_TAINT)); assert(RBASIC_CLASS(ret) == rb_cString); return ret; } static VALUE setup_fake_str(struct RString *fake_str, const char *name, long len, int encidx) { fake_str->basic.flags = T_STRING|RSTRING_NOEMBED|STR_NOFREE|STR_FAKESTR; /* SHARED to be allocated by the callback */ ENCODING_SET_INLINED((VALUE)fake_str, encidx); RBASIC_SET_CLASS_RAW((VALUE)fake_str, rb_cString); fake_str->as.heap.len = len; fake_str->as.heap.ptr = (char *)name; fake_str->as.heap.aux.capa = len; return (VALUE)fake_str; } VALUE rb_setup_fake_str(struct RString *fake_str, const char *name, long len, rb_encoding *enc) { return setup_fake_str(fake_str, name, len, rb_enc_to_index(enc)); } VALUE rb_fstring_new(const char *ptr, long len) { struct RString fake_str; return register_fstring(setup_fake_str(&fake_str, ptr, len, ENCINDEX_US_ASCII)); } VALUE rb_fstring_enc_new(const char *ptr, long len, rb_encoding *enc) { struct RString fake_str; return register_fstring(rb_setup_fake_str(&fake_str, ptr, len, enc)); } VALUE rb_fstring_cstr(const char *ptr) { return rb_fstring_new(ptr, strlen(ptr)); } VALUE rb_fstring_enc_cstr(const char *ptr, rb_encoding *enc) { return rb_fstring_enc_new(ptr, strlen(ptr), enc); } static int fstring_set_class_i(st_data_t key, st_data_t val, st_data_t arg) { RBASIC_SET_CLASS((VALUE)key, (VALUE)arg); return ST_CONTINUE; } static int fstring_cmp(VALUE a, VALUE b) { long alen, blen; const char *aptr, *bptr; RSTRING_GETMEM(a, aptr, alen); RSTRING_GETMEM(b, bptr, blen); return (alen != blen || ENCODING_GET(a) != ENCODING_GET(b) || memcmp(aptr, bptr, alen) != 0); } static inline int single_byte_optimizable(VALUE str) { rb_encoding *enc; /* Conservative. It may be ENC_CODERANGE_UNKNOWN. */ if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) return 1; enc = STR_ENC_GET(str); if (rb_enc_mbmaxlen(enc) == 1) return 1; /* Conservative. Possibly single byte. * "\xa1" in Shift_JIS for example. */ return 0; } VALUE rb_fs; static inline const char * search_nonascii(const char *p, const char *e) { const uintptr_t *s, *t; #if defined(__STDC_VERSION) && (__STDC_VERSION__ >= 199901L) # if SIZEOF_UINTPTR_T == 8 # define NONASCII_MASK UINT64_C(0x8080808080808080) # elif SIZEOF_UINTPTR_T == 4 # define NONASCII_MASK UINT32_C(0x80808080) # else # error "don't know what to do." # endif #else # if SIZEOF_UINTPTR_T == 8 # define NONASCII_MASK ((uintptr_t)0x80808080UL << 32 | (uintptr_t)0x80808080UL) # elif SIZEOF_UINTPTR_T == 4 # define NONASCII_MASK 0x80808080UL /* or...? */ # else # error "don't know what to do." # endif #endif if (UNALIGNED_WORD_ACCESS || e - p >= SIZEOF_VOIDP) { #if !UNALIGNED_WORD_ACCESS if ((uintptr_t)p % SIZEOF_VOIDP) { int l = SIZEOF_VOIDP - (uintptr_t)p % SIZEOF_VOIDP; p += l; switch (l) { default: UNREACHABLE; #if SIZEOF_VOIDP > 4 case 7: if (p[-7]&0x80) return p-7; case 6: if (p[-6]&0x80) return p-6; case 5: if (p[-5]&0x80) return p-5; case 4: if (p[-4]&0x80) return p-4; #endif case 3: if (p[-3]&0x80) return p-3; case 2: if (p[-2]&0x80) return p-2; case 1: if (p[-1]&0x80) return p-1; case 0: break; } } #endif s = (const uintptr_t *)p; t = (const uintptr_t *)(e - (SIZEOF_VOIDP-1)); for (;s < t; s++) { if (*s & NONASCII_MASK) { #ifdef WORDS_BIGENDIAN return (const char *)s + (nlz_intptr(*s&NONASCII_MASK)>>3); #else return (const char *)s + (ntz_intptr(*s&NONASCII_MASK)>>3); #endif } } p = (const char *)s; } switch (e - p) { default: UNREACHABLE; #if SIZEOF_VOIDP > 4 case 7: if (e[-7]&0x80) return e-7; case 6: if (e[-6]&0x80) return e-6; case 5: if (e[-5]&0x80) return e-5; case 4: if (e[-4]&0x80) return e-4; #endif case 3: if (e[-3]&0x80) return e-3; case 2: if (e[-2]&0x80) return e-2; case 1: if (e[-1]&0x80) return e-1; case 0: return NULL; } } static int coderange_scan(const char *p, long len, rb_encoding *enc) { const char *e = p + len; if (rb_enc_to_index(enc) == rb_ascii8bit_encindex()) { /* enc is ASCII-8BIT. ASCII-8BIT string never be broken. */ p = search_nonascii(p, e); return p ? ENC_CODERANGE_VALID : ENC_CODERANGE_7BIT; } if (rb_enc_asciicompat(enc)) { p = search_nonascii(p, e); if (!p) return ENC_CODERANGE_7BIT; for (;;) { int ret = rb_enc_precise_mbclen(p, e, enc); if (!MBCLEN_CHARFOUND_P(ret)) return ENC_CODERANGE_BROKEN; p += MBCLEN_CHARFOUND_LEN(ret); if (p == e) break; p = search_nonascii(p, e); if (!p) break; } } else { while (p < e) { int ret = rb_enc_precise_mbclen(p, e, enc); if (!MBCLEN_CHARFOUND_P(ret)) return ENC_CODERANGE_BROKEN; p += MBCLEN_CHARFOUND_LEN(ret); } } return ENC_CODERANGE_VALID; } long rb_str_coderange_scan_restartable(const char *s, const char *e, rb_encoding *enc, int *cr) { const char *p = s; if (*cr == ENC_CODERANGE_BROKEN) return e - s; if (rb_enc_to_index(enc) == rb_ascii8bit_encindex()) { /* enc is ASCII-8BIT. ASCII-8BIT string never be broken. */ if (*cr == ENC_CODERANGE_VALID) return e - s; p = search_nonascii(p, e); *cr = p ? ENC_CODERANGE_VALID : ENC_CODERANGE_7BIT; return e - s; } else if (rb_enc_asciicompat(enc)) { p = search_nonascii(p, e); if (!p) { if (*cr != ENC_CODERANGE_VALID) *cr = ENC_CODERANGE_7BIT; return e - s; } for (;;) { int ret = rb_enc_precise_mbclen(p, e, enc); if (!MBCLEN_CHARFOUND_P(ret)) { *cr = MBCLEN_INVALID_P(ret) ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_UNKNOWN; return p - s; } p += MBCLEN_CHARFOUND_LEN(ret); if (p == e) break; p = search_nonascii(p, e); if (!p) break; } } else { while (p < e) { int ret = rb_enc_precise_mbclen(p, e, enc); if (!MBCLEN_CHARFOUND_P(ret)) { *cr = MBCLEN_INVALID_P(ret) ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_UNKNOWN; return p - s; } p += MBCLEN_CHARFOUND_LEN(ret); } } *cr = ENC_CODERANGE_VALID; return e - s; } static inline void str_enc_copy(VALUE str1, VALUE str2) { rb_enc_set_index(str1, ENCODING_GET(str2)); } static void rb_enc_cr_str_copy_for_substr(VALUE dest, VALUE src) { /* this function is designed for copying encoding and coderange * from src to new string "dest" which is made from the part of src. */ str_enc_copy(dest, src); if (RSTRING_LEN(dest) == 0) { if (!rb_enc_asciicompat(STR_ENC_GET(src))) ENC_CODERANGE_SET(dest, ENC_CODERANGE_VALID); else ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT); return; } switch (ENC_CODERANGE(src)) { case ENC_CODERANGE_7BIT: ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT); break; case ENC_CODERANGE_VALID: if (!rb_enc_asciicompat(STR_ENC_GET(src)) || search_nonascii(RSTRING_PTR(dest), RSTRING_END(dest))) ENC_CODERANGE_SET(dest, ENC_CODERANGE_VALID); else ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT); break; default: break; } } static void rb_enc_cr_str_exact_copy(VALUE dest, VALUE src) { str_enc_copy(dest, src); ENC_CODERANGE_SET(dest, ENC_CODERANGE(src)); } int rb_enc_str_coderange(VALUE str) { int cr = ENC_CODERANGE(str); if (cr == ENC_CODERANGE_UNKNOWN) { int encidx = ENCODING_GET(str); rb_encoding *enc = rb_enc_from_index(encidx); if (rb_enc_mbminlen(enc) > 1 && rb_enc_dummy_p(enc)) { cr = ENC_CODERANGE_BROKEN; } else { cr = coderange_scan(RSTRING_PTR(str), RSTRING_LEN(str), get_actual_encoding(encidx, str)); } ENC_CODERANGE_SET(str, cr); } return cr; } int rb_enc_str_asciionly_p(VALUE str) { rb_encoding *enc = STR_ENC_GET(str); if (!rb_enc_asciicompat(enc)) return FALSE; else if (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT) return TRUE; return FALSE; } static inline void str_mod_check(VALUE s, const char *p, long len) { if (RSTRING_PTR(s) != p || RSTRING_LEN(s) != len){ rb_raise(rb_eRuntimeError, "string modified"); } } static size_t str_capacity(VALUE str, const int termlen) { if (STR_EMBED_P(str)) { return (RSTRING_EMBED_LEN_MAX + 1 - termlen); } else if (FL_TEST(str, STR_SHARED|STR_NOFREE)) { return RSTRING(str)->as.heap.len; } else { return RSTRING(str)->as.heap.aux.capa; } } size_t rb_str_capacity(VALUE str) { return str_capacity(str, TERM_LEN(str)); } static inline void must_not_null(const char *ptr) { if (!ptr) { rb_raise(rb_eArgError, "NULL pointer given"); } } static inline VALUE str_alloc(VALUE klass) { NEWOBJ_OF(str, struct RString, klass, T_STRING | (RGENGC_WB_PROTECTED_STRING ? FL_WB_PROTECTED : 0)); return (VALUE)str; } static inline VALUE empty_str_alloc(VALUE klass) { RUBY_DTRACE_CREATE_HOOK(STRING, 0); return str_alloc(klass); } static VALUE str_new0(VALUE klass, const char *ptr, long len, int termlen) { VALUE str; if (len < 0) { rb_raise(rb_eArgError, "negative string size (or size too big)"); } RUBY_DTRACE_CREATE_HOOK(STRING, len); str = str_alloc(klass); if (!STR_EMBEDDABLE_P(len, termlen)) { RSTRING(str)->as.heap.aux.capa = len; RSTRING(str)->as.heap.ptr = ALLOC_N(char, (size_t)len + termlen); STR_SET_NOEMBED(str); } else if (len == 0) { ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT); } if (ptr) { memcpy(RSTRING_PTR(str), ptr, len); } STR_SET_LEN(str, len); TERM_FILL(RSTRING_PTR(str) + len, termlen); return str; } static VALUE str_new(VALUE klass, const char *ptr, long len) { return str_new0(klass, ptr, len, 1); } VALUE rb_str_new(const char *ptr, long len) { return str_new(rb_cString, ptr, len); } VALUE rb_usascii_str_new(const char *ptr, long len) { VALUE str = rb_str_new(ptr, len); ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT); return str; } VALUE rb_utf8_str_new(const char *ptr, long len) { VALUE str = str_new(rb_cString, ptr, len); rb_enc_associate_index(str, rb_utf8_encindex()); return str; } VALUE rb_enc_str_new(const char *ptr, long len, rb_encoding *enc) { VALUE str; if (!enc) return rb_str_new(ptr, len); str = str_new0(rb_cString, ptr, len, rb_enc_mbminlen(enc)); rb_enc_associate(str, enc); return str; } VALUE rb_str_new_cstr(const char *ptr) { must_not_null(ptr); return rb_str_new(ptr, strlen(ptr)); } VALUE rb_usascii_str_new_cstr(const char *ptr) { VALUE str = rb_str_new_cstr(ptr); ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT); return str; } VALUE rb_utf8_str_new_cstr(const char *ptr) { VALUE str = rb_str_new_cstr(ptr); rb_enc_associate_index(str, rb_utf8_encindex()); return str; } VALUE rb_enc_str_new_cstr(const char *ptr, rb_encoding *enc) { must_not_null(ptr); if (rb_enc_mbminlen(enc) != 1) { rb_raise(rb_eArgError, "wchar encoding given"); } return rb_enc_str_new(ptr, strlen(ptr), enc); } static VALUE str_new_static(VALUE klass, const char *ptr, long len, int encindex) { VALUE str; if (len < 0) { rb_raise(rb_eArgError, "negative string size (or size too big)"); } if (!ptr) { rb_encoding *enc = rb_enc_get_from_index(encindex); str = str_new0(klass, ptr, len, rb_enc_mbminlen(enc)); } else { RUBY_DTRACE_CREATE_HOOK(STRING, len); str = str_alloc(klass); RSTRING(str)->as.heap.len = len; RSTRING(str)->as.heap.ptr = (char *)ptr; RSTRING(str)->as.heap.aux.capa = len; STR_SET_NOEMBED(str); RBASIC(str)->flags |= STR_NOFREE; } rb_enc_associate_index(str, encindex); return str; } VALUE rb_str_new_static(const char *ptr, long len) { return str_new_static(rb_cString, ptr, len, 0); } VALUE rb_usascii_str_new_static(const char *ptr, long len) { return str_new_static(rb_cString, ptr, len, ENCINDEX_US_ASCII); } VALUE rb_utf8_str_new_static(const char *ptr, long len) { return str_new_static(rb_cString, ptr, len, ENCINDEX_UTF_8); } VALUE rb_enc_str_new_static(const char *ptr, long len, rb_encoding *enc) { return str_new_static(rb_cString, ptr, len, rb_enc_to_index(enc)); } VALUE rb_tainted_str_new(const char *ptr, long len) { VALUE str = rb_str_new(ptr, len); OBJ_TAINT(str); return str; } static VALUE rb_tainted_str_new_with_enc(const char *ptr, long len, rb_encoding *enc) { VALUE str = rb_enc_str_new(ptr, len, enc); OBJ_TAINT(str); return str; } VALUE rb_tainted_str_new_cstr(const char *ptr) { VALUE str = rb_str_new_cstr(ptr); OBJ_TAINT(str); return str; } static VALUE str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts); VALUE rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts) { long len; const char *ptr; VALUE newstr; if (!to) return str; if (!from) from = rb_enc_get(str); if (from == to) return str; if ((rb_enc_asciicompat(to) && is_ascii_string(str)) || to == rb_ascii8bit_encoding()) { if (STR_ENC_GET(str) != to) { str = rb_str_dup(str); rb_enc_associate(str, to); } return str; } RSTRING_GETMEM(str, ptr, len); newstr = str_cat_conv_enc_opts(rb_str_buf_new(len), 0, ptr, len, from, to, ecflags, ecopts); if (NIL_P(newstr)) { /* some error, return original */ return str; } OBJ_INFECT(newstr, str); return newstr; } VALUE rb_str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len, rb_encoding *from, int ecflags, VALUE ecopts) { long olen; olen = RSTRING_LEN(newstr); if (ofs < -olen || olen < ofs) rb_raise(rb_eIndexError, "index %ld out of string", ofs); if (ofs < 0) ofs += olen; if (!from) { STR_SET_LEN(newstr, ofs); return rb_str_cat(newstr, ptr, len); } rb_str_modify(newstr); return str_cat_conv_enc_opts(newstr, ofs, ptr, len, from, rb_enc_get(newstr), ecflags, ecopts); } VALUE rb_str_initialize(VALUE str, const char *ptr, long len, rb_encoding *enc) { STR_SET_LEN(str, 0); rb_enc_associate(str, enc); rb_str_cat(str, ptr, len); return str; } static VALUE str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts) { rb_econv_t *ec; rb_econv_result_t ret; long olen; VALUE econv_wrapper; const unsigned char *start, *sp; unsigned char *dest, *dp; size_t converted_output = (size_t)ofs; olen = rb_str_capacity(newstr); econv_wrapper = rb_obj_alloc(rb_cEncodingConverter); RBASIC_CLEAR_CLASS(econv_wrapper); ec = rb_econv_open_opts(from->name, to->name, ecflags, ecopts); if (!ec) return Qnil; DATA_PTR(econv_wrapper) = ec; sp = (unsigned char*)ptr; start = sp; while ((dest = (unsigned char*)RSTRING_PTR(newstr)), (dp = dest + converted_output), (ret = rb_econv_convert(ec, &sp, start + len, &dp, dest + olen, 0)), ret == econv_destination_buffer_full) { /* destination buffer short */ size_t converted_input = sp - start; size_t rest = len - converted_input; converted_output = dp - dest; rb_str_set_len(newstr, converted_output); if (converted_input && converted_output && rest < (LONG_MAX / converted_output)) { rest = (rest * converted_output) / converted_input; } else { rest = olen; } olen += rest < 2 ? 2 : rest; rb_str_resize(newstr, olen); } DATA_PTR(econv_wrapper) = 0; rb_econv_close(ec); rb_gc_force_recycle(econv_wrapper); switch (ret) { case econv_finished: len = dp - (unsigned char*)RSTRING_PTR(newstr); rb_str_set_len(newstr, len); rb_enc_associate(newstr, to); return newstr; default: return Qnil; } } VALUE rb_str_conv_enc(VALUE str, rb_encoding *from, rb_encoding *to) { return rb_str_conv_enc_opts(str, from, to, 0, Qnil); } VALUE rb_external_str_new_with_enc(const char *ptr, long len, rb_encoding *eenc) { rb_encoding *ienc; VALUE str; const int eidx = rb_enc_to_index(eenc); if (!ptr) { return rb_tainted_str_new_with_enc(ptr, len, eenc); } /* ASCII-8BIT case, no conversion */ if ((eidx == rb_ascii8bit_encindex()) || (eidx == rb_usascii_encindex() && search_nonascii(ptr, ptr + len))) { return rb_tainted_str_new(ptr, len); } /* no default_internal or same encoding, no conversion */ ienc = rb_default_internal_encoding(); if (!ienc || eenc == ienc) { return rb_tainted_str_new_with_enc(ptr, len, eenc); } /* ASCII compatible, and ASCII only string, no conversion in * default_internal */ if ((eidx == rb_ascii8bit_encindex()) || (eidx == rb_usascii_encindex()) || (rb_enc_asciicompat(eenc) && !search_nonascii(ptr, ptr + len))) { return rb_tainted_str_new_with_enc(ptr, len, ienc); } /* convert from the given encoding to default_internal */ str = rb_tainted_str_new_with_enc(NULL, 0, ienc); /* when the conversion failed for some reason, just ignore the * default_internal and result in the given encoding as-is. */ if (NIL_P(rb_str_cat_conv_enc_opts(str, 0, ptr, len, eenc, 0, Qnil))) { rb_str_initialize(str, ptr, len, eenc); } return str; } VALUE rb_external_str_with_enc(VALUE str, rb_encoding *eenc) { int eidx = rb_enc_to_index(eenc); if (eidx == rb_usascii_encindex() && rb_enc_str_coderange(str) != ENC_CODERANGE_7BIT) { rb_enc_associate_index(str, rb_ascii8bit_encindex()); return str; } rb_enc_associate_index(str, eidx); return rb_str_conv_enc(str, eenc, rb_default_internal_encoding()); } VALUE rb_external_str_new(const char *ptr, long len) { return rb_external_str_new_with_enc(ptr, len, rb_default_external_encoding()); } VALUE rb_external_str_new_cstr(const char *ptr) { return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_default_external_encoding()); } VALUE rb_locale_str_new(const char *ptr, long len) { return rb_external_str_new_with_enc(ptr, len, rb_locale_encoding()); } VALUE rb_locale_str_new_cstr(const char *ptr) { return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_locale_encoding()); } VALUE rb_filesystem_str_new(const char *ptr, long len) { return rb_external_str_new_with_enc(ptr, len, rb_filesystem_encoding()); } VALUE rb_filesystem_str_new_cstr(const char *ptr) { return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_filesystem_encoding()); } VALUE rb_str_export(VALUE str) { return rb_str_conv_enc(str, STR_ENC_GET(str), rb_default_external_encoding()); } VALUE rb_str_export_locale(VALUE str) { return rb_str_conv_enc(str, STR_ENC_GET(str), rb_locale_encoding()); } VALUE rb_str_export_to_enc(VALUE str, rb_encoding *enc) { return rb_str_conv_enc(str, STR_ENC_GET(str), enc); } static VALUE str_replace_shared_without_enc(VALUE str2, VALUE str) { const int termlen = TERM_LEN(str); char *ptr; long len; RSTRING_GETMEM(str, ptr, len); if (STR_EMBEDDABLE_P(len, termlen)) { char *ptr2 = RSTRING(str2)->as.ary; STR_SET_EMBED(str2); memcpy(ptr2, RSTRING_PTR(str), len); STR_SET_EMBED_LEN(str2, len); TERM_FILL(ptr2+len, termlen); } else { str = rb_str_new_frozen(str); FL_SET(str2, STR_NOEMBED); RSTRING_GETMEM(str, ptr, len); RSTRING(str2)->as.heap.len = len; RSTRING(str2)->as.heap.ptr = ptr; STR_SET_SHARED(str2, str); } return str2; } static VALUE str_replace_shared(VALUE str2, VALUE str) { str_replace_shared_without_enc(str2, str); rb_enc_cr_str_exact_copy(str2, str); return str2; } static VALUE str_new_shared(VALUE klass, VALUE str) { return str_replace_shared(str_alloc(klass), str); } VALUE rb_str_new_shared(VALUE str) { VALUE str2 = str_new_shared(rb_obj_class(str), str); OBJ_INFECT(str2, str); return str2; } VALUE rb_str_new_frozen(VALUE orig) { VALUE str; if (OBJ_FROZEN(orig)) return orig; str = str_new_frozen(rb_obj_class(orig), orig); OBJ_INFECT(str, orig); return str; } VALUE rb_str_tmp_frozen_acquire(VALUE orig) { VALUE tmp; if (OBJ_FROZEN_RAW(orig)) return orig; tmp = str_new_frozen(0, orig); OBJ_INFECT(tmp, orig); return tmp; } void rb_str_tmp_frozen_release(VALUE orig, VALUE tmp) { if (RBASIC_CLASS(tmp) != 0) return; if (STR_EMBED_P(tmp)) { assert(OBJ_FROZEN_RAW(tmp)); rb_gc_force_recycle(tmp); } else if (FL_TEST_RAW(orig, STR_SHARED) && !FL_TEST_RAW(orig, STR_TMPLOCK|RUBY_FL_FREEZE)) { VALUE shared = RSTRING(orig)->as.heap.aux.shared; if (shared == tmp && !FL_TEST_RAW(tmp, STR_IS_SHARED_M)) { FL_UNSET_RAW(orig, STR_SHARED); assert(RSTRING(orig)->as.heap.ptr == RSTRING(tmp)->as.heap.ptr); assert(RSTRING(orig)->as.heap.len == RSTRING(tmp)->as.heap.len); RSTRING(orig)->as.heap.aux.capa = RSTRING(tmp)->as.heap.aux.capa; RBASIC(orig)->flags |= RBASIC(tmp)->flags & STR_NOFREE; assert(OBJ_FROZEN_RAW(tmp)); rb_gc_force_recycle(tmp); } } } static VALUE str_new_frozen(VALUE klass, VALUE orig) { VALUE str; if (STR_EMBED_P(orig)) { str = str_new(klass, RSTRING_PTR(orig), RSTRING_LEN(orig)); } else { if (FL_TEST_RAW(orig, STR_SHARED)) { VALUE shared = RSTRING(orig)->as.heap.aux.shared; long ofs = RSTRING(orig)->as.heap.ptr - RSTRING(shared)->as.heap.ptr; long rest = RSTRING(shared)->as.heap.len - ofs - RSTRING(orig)->as.heap.len; assert(!STR_EMBED_P(shared)); assert(OBJ_FROZEN(shared)); if ((ofs > 0) || (rest > 0) || (klass != RBASIC(shared)->klass) || ((RBASIC(shared)->flags ^ RBASIC(orig)->flags) & FL_TAINT) || ENCODING_GET(shared) != ENCODING_GET(orig)) { str = str_new_shared(klass, shared); RSTRING(str)->as.heap.ptr += ofs; RSTRING(str)->as.heap.len -= ofs + rest; } else { if (RBASIC_CLASS(shared) == 0) FL_SET_RAW(shared, STR_IS_SHARED_M); return shared; } } else if (STR_EMBEDDABLE_P(RSTRING_LEN(orig), TERM_LEN(orig))) { str = str_alloc(klass); STR_SET_EMBED(str); memcpy(RSTRING_PTR(str), RSTRING_PTR(orig), RSTRING_LEN(orig)); STR_SET_EMBED_LEN(str, RSTRING_LEN(orig)); TERM_FILL(RSTRING_END(str), TERM_LEN(orig)); } else { str = str_alloc(klass); STR_SET_NOEMBED(str); RSTRING(str)->as.heap.len = RSTRING_LEN(orig); RSTRING(str)->as.heap.ptr = RSTRING_PTR(orig); RSTRING(str)->as.heap.aux.capa = RSTRING(orig)->as.heap.aux.capa; RBASIC(str)->flags |= RBASIC(orig)->flags & STR_NOFREE; RBASIC(orig)->flags &= ~STR_NOFREE; STR_SET_SHARED(orig, str); if (klass == 0) FL_UNSET_RAW(str, STR_IS_SHARED_M); } } rb_enc_cr_str_exact_copy(str, orig); OBJ_FREEZE(str); return str; } VALUE rb_str_new_with_class(VALUE obj, const char *ptr, long len) { return str_new0(rb_obj_class(obj), ptr, len, TERM_LEN(obj)); } static VALUE str_new_empty(VALUE str) { VALUE v = rb_str_new_with_class(str, 0, 0); rb_enc_copy(v, str); OBJ_INFECT(v, str); return v; } #define STR_BUF_MIN_SIZE 127 VALUE rb_str_buf_new(long capa) { VALUE str = str_alloc(rb_cString); if (capa < STR_BUF_MIN_SIZE) { capa = STR_BUF_MIN_SIZE; } FL_SET(str, STR_NOEMBED); RSTRING(str)->as.heap.aux.capa = capa; RSTRING(str)->as.heap.ptr = ALLOC_N(char, (size_t)capa + 1); RSTRING(str)->as.heap.ptr[0] = '\0'; return str; } VALUE rb_str_buf_new_cstr(const char *ptr) { VALUE str; long len = strlen(ptr); str = rb_str_buf_new(len); rb_str_buf_cat(str, ptr, len); return str; } VALUE rb_str_tmp_new(long len) { return str_new(0, 0, len); } void rb_str_free(VALUE str) { if (FL_TEST(str, RSTRING_FSTR)) { st_data_t fstr = (st_data_t)str; st_delete(rb_vm_fstring_table(), &fstr, NULL); RB_DEBUG_COUNTER_INC(obj_str_fstr); } if (STR_EMBED_P(str)) { RB_DEBUG_COUNTER_INC(obj_str_embed); } else if (FL_TEST(str, STR_SHARED | STR_NOFREE)) { (void)RB_DEBUG_COUNTER_INC_IF(obj_str_shared, FL_TEST(str, STR_SHARED)); (void)RB_DEBUG_COUNTER_INC_IF(obj_str_shared, FL_TEST(str, STR_NOFREE)); } else { RB_DEBUG_COUNTER_INC(obj_str_ptr); ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str)); } } RUBY_FUNC_EXPORTED size_t rb_str_memsize(VALUE str) { if (FL_TEST(str, STR_NOEMBED|STR_SHARED|STR_NOFREE) == STR_NOEMBED) { return STR_HEAP_SIZE(str); } else { return 0; } } VALUE rb_str_to_str(VALUE str) { return rb_convert_type_with_id(str, T_STRING, "String", idTo_str); } static inline void str_discard(VALUE str); static void str_shared_replace(VALUE str, VALUE str2); void rb_str_shared_replace(VALUE str, VALUE str2) { if (str != str2) str_shared_replace(str, str2); } static void str_shared_replace(VALUE str, VALUE str2) { rb_encoding *enc; int cr; int termlen; RUBY_ASSERT(str2 != str); enc = STR_ENC_GET(str2); cr = ENC_CODERANGE(str2); str_discard(str); OBJ_INFECT(str, str2); termlen = rb_enc_mbminlen(enc); if (STR_EMBEDDABLE_P(RSTRING_LEN(str2), termlen)) { STR_SET_EMBED(str); memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), (size_t)RSTRING_LEN(str2) + termlen); STR_SET_EMBED_LEN(str, RSTRING_LEN(str2)); rb_enc_associate(str, enc); ENC_CODERANGE_SET(str, cr); } else { STR_SET_NOEMBED(str); FL_UNSET(str, STR_SHARED); RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2); RSTRING(str)->as.heap.len = RSTRING_LEN(str2); if (FL_TEST(str2, STR_SHARED)) { VALUE shared = RSTRING(str2)->as.heap.aux.shared; STR_SET_SHARED(str, shared); } else { RSTRING(str)->as.heap.aux.capa = RSTRING(str2)->as.heap.aux.capa; } /* abandon str2 */ STR_SET_EMBED(str2); RSTRING_PTR(str2)[0] = 0; STR_SET_EMBED_LEN(str2, 0); rb_enc_associate(str, enc); ENC_CODERANGE_SET(str, cr); } } VALUE rb_obj_as_string_result(VALUE str, VALUE obj); VALUE rb_obj_as_string(VALUE obj) { VALUE str; if (RB_TYPE_P(obj, T_STRING)) { return obj; } str = rb_funcall(obj, idTo_s, 0); return rb_obj_as_string_result(str, obj); } VALUE rb_obj_as_string_result(VALUE str, VALUE obj) { if (!RB_TYPE_P(str, T_STRING)) return rb_any_to_s(obj); if (!FL_TEST_RAW(str, RSTRING_FSTR) && FL_ABLE(obj)) /* fstring must not be tainted, at least */ OBJ_INFECT_RAW(str, obj); return str; } static VALUE str_replace(VALUE str, VALUE str2) { long len; len = RSTRING_LEN(str2); if (STR_SHARED_P(str2)) { VALUE shared = RSTRING(str2)->as.heap.aux.shared; assert(OBJ_FROZEN(shared)); STR_SET_NOEMBED(str); RSTRING(str)->as.heap.len = len; RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2); STR_SET_SHARED(str, shared); rb_enc_cr_str_exact_copy(str, str2); } else { str_replace_shared(str, str2); } OBJ_INFECT(str, str2); return str; } static inline VALUE str_duplicate(VALUE klass, VALUE str) { enum {embed_size = RSTRING_EMBED_LEN_MAX + 1}; const VALUE flag_mask = RSTRING_NOEMBED | RSTRING_EMBED_LEN_MASK | ENC_CODERANGE_MASK | ENCODING_MASK | FL_TAINT | FL_FREEZE ; VALUE flags = FL_TEST_RAW(str, flag_mask); VALUE dup = str_alloc(klass); MEMCPY(RSTRING(dup)->as.ary, RSTRING(str)->as.ary, char, embed_size); if (flags & STR_NOEMBED) { if (UNLIKELY(!(flags & FL_FREEZE))) { str = str_new_frozen(klass, str); FL_SET_RAW(str, flags & FL_TAINT); flags = FL_TEST_RAW(str, flag_mask); } if (flags & STR_NOEMBED) { RB_OBJ_WRITE(dup, &RSTRING(dup)->as.heap.aux.shared, str); flags |= STR_SHARED; } else { MEMCPY(RSTRING(dup)->as.ary, RSTRING(str)->as.ary, char, embed_size); } } FL_SET_RAW(dup, flags & ~FL_FREEZE); return dup; } VALUE rb_str_dup(VALUE str) { return str_duplicate(rb_obj_class(str), str); } VALUE rb_str_resurrect(VALUE str) { RUBY_DTRACE_CREATE_HOOK(STRING, RSTRING_LEN(str)); return str_duplicate(rb_cString, str); } /* * call-seq: * String.new(str="") -> new_str * String.new(str="", encoding: enc) -> new_str * String.new(str="", capacity: size) -> new_str * * Returns a new string object containing a copy of str. * * The optional encoding keyword argument specifies the encoding * of the new string. * If not specified, the encoding of str is used * (or ASCII-8BIT, if str is not specified). * * The optional capacity keyword argument specifies the size * of the internal buffer. * This may improve performance, when the string will be concatenated many * times (causing many realloc calls). */ static VALUE rb_str_init(int argc, VALUE *argv, VALUE str) { static ID keyword_ids[2]; VALUE orig, opt, venc, vcapa; VALUE kwargs[2]; rb_encoding *enc = 0; int n; if (!keyword_ids[0]) { keyword_ids[0] = rb_id_encoding(); CONST_ID(keyword_ids[1], "capacity"); } n = rb_scan_args(argc, argv, "01:", &orig, &opt); if (!NIL_P(opt)) { rb_get_kwargs(opt, keyword_ids, 0, 2, kwargs); venc = kwargs[0]; vcapa = kwargs[1]; if (venc != Qundef && !NIL_P(venc)) { enc = rb_to_encoding(venc); } if (vcapa != Qundef && !NIL_P(vcapa)) { long capa = NUM2LONG(vcapa); long len = 0; int termlen = enc ? rb_enc_mbminlen(enc) : 1; if (capa < STR_BUF_MIN_SIZE) { capa = STR_BUF_MIN_SIZE; } if (n == 1) { StringValue(orig); len = RSTRING_LEN(orig); if (capa < len) { capa = len; } if (orig == str) n = 0; } str_modifiable(str); if (STR_EMBED_P(str)) { /* make noembed always */ RSTRING(str)->as.heap.ptr = ALLOC_N(char, (size_t)capa + termlen); } else if (STR_HEAP_SIZE(str) != (size_t)capa + termlen) { REALLOC_N(RSTRING(str)->as.heap.ptr, char, (size_t)capa + termlen); } RSTRING(str)->as.heap.len = len; TERM_FILL(&RSTRING(str)->as.heap.ptr[len], termlen); if (n == 1) { memcpy(RSTRING(str)->as.heap.ptr, RSTRING_PTR(orig), len); rb_enc_cr_str_exact_copy(str, orig); } FL_SET(str, STR_NOEMBED); RSTRING(str)->as.heap.aux.capa = capa; } else if (n == 1) { rb_str_replace(str, orig); } if (enc) { rb_enc_associate(str, enc); ENC_CODERANGE_CLEAR(str); } } else if (n == 1) { rb_str_replace(str, orig); } return str; } #ifdef NONASCII_MASK #define is_utf8_lead_byte(c) (((c)&0xC0) != 0x80) /* * UTF-8 leading bytes have either 0xxxxxxx or 11xxxxxx * bit representation. (see http://en.wikipedia.org/wiki/UTF-8) * Therefore, the following pseudocode can detect UTF-8 leading bytes. * * if (!(byte & 0x80)) * byte |= 0x40; // turn on bit6 * return ((byte>>6) & 1); // bit6 represent whether this byte is leading or not. * * This function calculates whether a byte is leading or not for all bytes * in the argument word by concurrently using the above logic, and then * adds up the number of leading bytes in the word. */ static inline uintptr_t count_utf8_lead_bytes_with_word(const uintptr_t *s) { uintptr_t d = *s; /* Transform so that bit0 indicates whether we have a UTF-8 leading byte or not. */ d = (d>>6) | (~d>>7); d &= NONASCII_MASK >> 7; /* Gather all bytes. */ #if defined(HAVE_BUILTIN___BUILTIN_POPCOUNT) && defined(__POPCNT__) /* use only if it can use POPCNT */ return rb_popcount_intptr(d); #else d += (d>>8); d += (d>>16); # if SIZEOF_VOIDP == 8 d += (d>>32); # endif return (d&0xF); #endif } #endif static inline long enc_strlen(const char *p, const char *e, rb_encoding *enc, int cr) { long c; const char *q; if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) { long diff = (long)(e - p); return diff / rb_enc_mbminlen(enc) + !!(diff % rb_enc_mbminlen(enc)); } #ifdef NONASCII_MASK else if (cr == ENC_CODERANGE_VALID && enc == rb_utf8_encoding()) { uintptr_t len = 0; if ((int)sizeof(uintptr_t) * 2 < e - p) { const uintptr_t *s, *t; const uintptr_t lowbits = sizeof(uintptr_t) - 1; s = (const uintptr_t*)(~lowbits & ((uintptr_t)p + lowbits)); t = (const uintptr_t*)(~lowbits & (uintptr_t)e); while (p < (const char *)s) { if (is_utf8_lead_byte(*p)) len++; p++; } while (s < t) { len += count_utf8_lead_bytes_with_word(s); s++; } p = (const char *)s; } while (p < e) { if (is_utf8_lead_byte(*p)) len++; p++; } return (long)len; } #endif else if (rb_enc_asciicompat(enc)) { c = 0; if (ENC_CODERANGE_CLEAN_P(cr)) { while (p < e) { if (ISASCII(*p)) { q = search_nonascii(p, e); if (!q) return c + (e - p); c += q - p; p = q; } p += rb_enc_fast_mbclen(p, e, enc); c++; } } else { while (p < e) { if (ISASCII(*p)) { q = search_nonascii(p, e); if (!q) return c + (e - p); c += q - p; p = q; } p += rb_enc_mbclen(p, e, enc); c++; } } return c; } for (c=0; p integer * str.size -> integer * * Returns the character length of str. */ VALUE rb_str_length(VALUE str) { return LONG2NUM(str_strlen(str, NULL)); } /* * call-seq: * str.bytesize -> integer * * Returns the length of +str+ in bytes. * * "\x80\u3042".bytesize #=> 4 * "hello".bytesize #=> 5 */ static VALUE rb_str_bytesize(VALUE str) { return LONG2NUM(RSTRING_LEN(str)); } /* * call-seq: * str.empty? -> true or false * * Returns true if str has a length of zero. * * "hello".empty? #=> false * " ".empty? #=> false * "".empty? #=> true */ static VALUE rb_str_empty(VALUE str) { if (RSTRING_LEN(str) == 0) return Qtrue; return Qfalse; } /* * call-seq: * str + other_str -> new_str * * Concatenation---Returns a new String containing * other_str concatenated to str. * * "Hello from " + self.to_s #=> "Hello from main" */ VALUE rb_str_plus(VALUE str1, VALUE str2) { VALUE str3; rb_encoding *enc; char *ptr1, *ptr2, *ptr3; long len1, len2; int termlen; StringValue(str2); enc = rb_enc_check_str(str1, str2); RSTRING_GETMEM(str1, ptr1, len1); RSTRING_GETMEM(str2, ptr2, len2); termlen = rb_enc_mbminlen(enc); if (len1 > LONG_MAX - len2) { rb_raise(rb_eArgError, "string size too big"); } str3 = str_new0(rb_cString, 0, len1+len2, termlen); ptr3 = RSTRING_PTR(str3); memcpy(ptr3, ptr1, len1); memcpy(ptr3+len1, ptr2, len2); TERM_FILL(&ptr3[len1+len2], termlen); FL_SET_RAW(str3, OBJ_TAINTED_RAW(str1) | OBJ_TAINTED_RAW(str2)); ENCODING_CODERANGE_SET(str3, rb_enc_to_index(enc), ENC_CODERANGE_AND(ENC_CODERANGE(str1), ENC_CODERANGE(str2))); RB_GC_GUARD(str1); RB_GC_GUARD(str2); return str3; } /* * call-seq: * str * integer -> new_str * * Copy --- Returns a new String containing +integer+ copies of the receiver. * +integer+ must be greater than or equal to 0. * * "Ho! " * 3 #=> "Ho! Ho! Ho! " * "Ho! " * 0 #=> "" */ VALUE rb_str_times(VALUE str, VALUE times) { VALUE str2; long n, len; char *ptr2; int termlen; if (times == INT2FIX(1)) { return rb_str_dup(str); } if (times == INT2FIX(0)) { str2 = str_alloc(rb_obj_class(str)); rb_enc_copy(str2, str); OBJ_INFECT(str2, str); return str2; } len = NUM2LONG(times); if (len < 0) { rb_raise(rb_eArgError, "negative argument"); } if (RSTRING_LEN(str) == 1 && RSTRING_PTR(str)[0] == 0) { str2 = str_alloc(rb_obj_class(str)); if (!STR_EMBEDDABLE_P(len, 1)) { RSTRING(str2)->as.heap.aux.capa = len; RSTRING(str2)->as.heap.ptr = ZALLOC_N(char, (size_t)len + 1); STR_SET_NOEMBED(str2); } STR_SET_LEN(str2, len); rb_enc_copy(str2, str); OBJ_INFECT(str2, str); return str2; } if (len && LONG_MAX/len < RSTRING_LEN(str)) { rb_raise(rb_eArgError, "argument too big"); } len *= RSTRING_LEN(str); termlen = TERM_LEN(str); str2 = str_new0(rb_obj_class(str), 0, len, termlen); ptr2 = RSTRING_PTR(str2); if (len) { n = RSTRING_LEN(str); memcpy(ptr2, RSTRING_PTR(str), n); while (n <= len/2) { memcpy(ptr2 + n, ptr2, n); n *= 2; } memcpy(ptr2 + n, ptr2, len-n); } STR_SET_LEN(str2, len); TERM_FILL(&ptr2[len], termlen); OBJ_INFECT(str2, str); rb_enc_cr_str_copy_for_substr(str2, str); return str2; } /* * call-seq: * str % arg -> new_str * * Format---Uses str as a format specification, and returns the result * of applying it to arg. If the format specification contains more than * one substitution, then arg must be an Array or Hash * containing the values to be substituted. See Kernel::sprintf for * details of the format string. * * "%05d" % 123 #=> "00123" * "%-5s: %08x" % [ "ID", self.object_id ] #=> "ID : 200e14d6" * "foo = %{foo}" % { :foo => 'bar' } #=> "foo = bar" */ static VALUE rb_str_format_m(VALUE str, VALUE arg) { VALUE tmp = rb_check_array_type(arg); if (!NIL_P(tmp)) { VALUE rv = rb_str_format(RARRAY_LENINT(tmp), RARRAY_CONST_PTR(tmp), str); RB_GC_GUARD(tmp); return rv; } return rb_str_format(1, &arg, str); } static inline void rb_check_lockedtmp(VALUE str) { if (FL_TEST(str, STR_TMPLOCK)) { rb_raise(rb_eRuntimeError, "can't modify string; temporarily locked"); } } static inline void str_modifiable(VALUE str) { rb_check_lockedtmp(str); rb_check_frozen(str); } static inline int str_dependent_p(VALUE str) { if (STR_EMBED_P(str) || !FL_TEST(str, STR_SHARED|STR_NOFREE)) { return 0; } else { return 1; } } static inline int str_independent(VALUE str) { str_modifiable(str); return !str_dependent_p(str); } static void str_make_independent_expand(VALUE str, long len, long expand, const int termlen) { char *ptr; const char *oldptr; long capa = len + expand; if (len > capa) len = capa; if (!STR_EMBED_P(str) && STR_EMBEDDABLE_P(capa, termlen)) { ptr = RSTRING(str)->as.heap.ptr; STR_SET_EMBED(str); memcpy(RSTRING(str)->as.ary, ptr, len); TERM_FILL(RSTRING(str)->as.ary + len, termlen); STR_SET_EMBED_LEN(str, len); return; } ptr = ALLOC_N(char, (size_t)capa + termlen); oldptr = RSTRING_PTR(str); if (oldptr) { memcpy(ptr, oldptr, len); } STR_SET_NOEMBED(str); FL_UNSET(str, STR_SHARED|STR_NOFREE); TERM_FILL(ptr + len, termlen); RSTRING(str)->as.heap.ptr = ptr; RSTRING(str)->as.heap.len = len; RSTRING(str)->as.heap.aux.capa = capa; } void rb_str_modify(VALUE str) { if (!str_independent(str)) str_make_independent(str); ENC_CODERANGE_CLEAR(str); } void rb_str_modify_expand(VALUE str, long expand) { int termlen = TERM_LEN(str); long len = RSTRING_LEN(str); if (expand < 0) { rb_raise(rb_eArgError, "negative expanding string size"); } if (expand > LONG_MAX - len) { rb_raise(rb_eArgError, "string size too big"); } if (!str_independent(str)) { str_make_independent_expand(str, len, expand, termlen); } else if (expand > 0) { RESIZE_CAPA_TERM(str, len + expand, termlen); } ENC_CODERANGE_CLEAR(str); } /* As rb_str_modify(), but don't clear coderange */ static void str_modify_keep_cr(VALUE str) { if (!str_independent(str)) str_make_independent(str); if (ENC_CODERANGE(str) == ENC_CODERANGE_BROKEN) /* Force re-scan later */ ENC_CODERANGE_CLEAR(str); } static inline void str_discard(VALUE str) { str_modifiable(str); if (!STR_EMBED_P(str) && !FL_TEST(str, STR_SHARED|STR_NOFREE)) { ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str)); RSTRING(str)->as.heap.ptr = 0; RSTRING(str)->as.heap.len = 0; } } void rb_must_asciicompat(VALUE str) { rb_encoding *enc = rb_enc_get(str); if (!rb_enc_asciicompat(enc)) { rb_raise(rb_eEncCompatError, "ASCII incompatible encoding: %s", rb_enc_name(enc)); } } VALUE rb_string_value(volatile VALUE *ptr) { VALUE s = *ptr; if (!RB_TYPE_P(s, T_STRING)) { s = rb_str_to_str(s); *ptr = s; } return s; } char * rb_string_value_ptr(volatile VALUE *ptr) { VALUE str = rb_string_value(ptr); return RSTRING_PTR(str); } static int zero_filled(const char *s, int n) { for (; n > 0; --n) { if (*s++) return 0; } return 1; } static const char * str_null_char(const char *s, long len, const int minlen, rb_encoding *enc) { const char *e = s + len; for (; s + minlen <= e; s += rb_enc_mbclen(s, e, enc)) { if (zero_filled(s, minlen)) return s; } return 0; } static char * str_fill_term(VALUE str, char *s, long len, int termlen) { /* This function assumes that (capa + termlen) bytes of memory * is allocated, like many other functions in this file. */ if (str_dependent_p(str)) { if (!zero_filled(s + len, termlen)) str_make_independent_expand(str, len, 0L, termlen); } else { TERM_FILL(s + len, termlen); return s; } return RSTRING_PTR(str); } void rb_str_change_terminator_length(VALUE str, const int oldtermlen, const int termlen) { long capa = str_capacity(str, oldtermlen) + oldtermlen; long len = RSTRING_LEN(str); assert(capa >= len); if (capa - len < termlen) { rb_check_lockedtmp(str); str_make_independent_expand(str, len, 0L, termlen); } else if (str_dependent_p(str)) { if (termlen > oldtermlen) str_make_independent_expand(str, len, 0L, termlen); } else { if (!STR_EMBED_P(str)) { /* modify capa instead of realloc */ assert(!FL_TEST((str), STR_SHARED)); RSTRING(str)->as.heap.aux.capa = capa - termlen; } if (termlen > oldtermlen) { TERM_FILL(RSTRING_PTR(str) + len, termlen); } } return; } static char * str_null_check(VALUE str, int *w) { char *s = RSTRING_PTR(str); long len = RSTRING_LEN(str); rb_encoding *enc = rb_enc_get(str); const int minlen = rb_enc_mbminlen(enc); if (minlen > 1) { *w = 1; if (str_null_char(s, len, minlen, enc)) { return NULL; } return str_fill_term(str, s, len, minlen); } *w = 0; if (!s || memchr(s, 0, len)) { return NULL; } if (s[len]) { s = str_fill_term(str, s, len, minlen); } return s; } char * rb_str_to_cstr(VALUE str) { int w; return str_null_check(str, &w); } char * rb_string_value_cstr(volatile VALUE *ptr) { VALUE str = rb_string_value(ptr); int w; char *s = str_null_check(str, &w); if (!s) { if (w) { rb_raise(rb_eArgError, "string contains null char"); } rb_raise(rb_eArgError, "string contains null byte"); } return s; } char * rb_str_fill_terminator(VALUE str, const int newminlen) { char *s = RSTRING_PTR(str); long len = RSTRING_LEN(str); return str_fill_term(str, s, len, newminlen); } VALUE rb_check_string_type(VALUE str) { str = rb_check_convert_type_with_id(str, T_STRING, "String", idTo_str); return str; } /* * call-seq: * String.try_convert(obj) -> string or nil * * Try to convert obj into a String, using to_str method. * Returns converted string or nil if obj cannot be converted * for any reason. * * String.try_convert("str") #=> "str" * String.try_convert(/re/) #=> nil */ static VALUE rb_str_s_try_convert(VALUE dummy, VALUE str) { return rb_check_string_type(str); } static char* str_nth_len(const char *p, const char *e, long *nthp, rb_encoding *enc) { long nth = *nthp; if (rb_enc_mbmaxlen(enc) == 1) { p += nth; } else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) { p += nth * rb_enc_mbmaxlen(enc); } else if (rb_enc_asciicompat(enc)) { const char *p2, *e2; int n; while (p < e && 0 < nth) { e2 = p + nth; if (e < e2) { *nthp = nth; return (char *)e; } if (ISASCII(*p)) { p2 = search_nonascii(p, e2); if (!p2) { nth -= e2 - p; *nthp = nth; return (char *)e2; } nth -= p2 - p; p = p2; } n = rb_enc_mbclen(p, e, enc); p += n; nth--; } *nthp = nth; if (nth != 0) { return (char *)e; } return (char *)p; } else { while (p < e && nth--) { p += rb_enc_mbclen(p, e, enc); } } if (p > e) p = e; *nthp = nth; return (char*)p; } char* rb_enc_nth(const char *p, const char *e, long nth, rb_encoding *enc) { return str_nth_len(p, e, &nth, enc); } static char* str_nth(const char *p, const char *e, long nth, rb_encoding *enc, int singlebyte) { if (singlebyte) p += nth; else { p = str_nth_len(p, e, &nth, enc); } if (!p) return 0; if (p > e) p = e; return (char *)p; } /* char offset to byte offset */ static long str_offset(const char *p, const char *e, long nth, rb_encoding *enc, int singlebyte) { const char *pp = str_nth(p, e, nth, enc, singlebyte); if (!pp) return e - p; return pp - p; } long rb_str_offset(VALUE str, long pos) { return str_offset(RSTRING_PTR(str), RSTRING_END(str), pos, STR_ENC_GET(str), single_byte_optimizable(str)); } #ifdef NONASCII_MASK static char * str_utf8_nth(const char *p, const char *e, long *nthp) { long nth = *nthp; if ((int)SIZEOF_VOIDP * 2 < e - p && (int)SIZEOF_VOIDP * 2 < nth) { const uintptr_t *s, *t; const uintptr_t lowbits = SIZEOF_VOIDP - 1; s = (const uintptr_t*)(~lowbits & ((uintptr_t)p + lowbits)); t = (const uintptr_t*)(~lowbits & (uintptr_t)e); while (p < (const char *)s) { if (is_utf8_lead_byte(*p)) nth--; p++; } do { nth -= count_utf8_lead_bytes_with_word(s); s++; } while (s < t && (int)SIZEOF_VOIDP <= nth); p = (char *)s; } while (p < e) { if (is_utf8_lead_byte(*p)) { if (nth == 0) break; nth--; } p++; } *nthp = nth; return (char *)p; } static long str_utf8_offset(const char *p, const char *e, long nth) { const char *pp = str_utf8_nth(p, e, &nth); return pp - p; } #endif /* byte offset to char offset */ long rb_str_sublen(VALUE str, long pos) { if (single_byte_optimizable(str) || pos < 0) return pos; else { char *p = RSTRING_PTR(str); return enc_strlen(p, p + pos, STR_ENC_GET(str), ENC_CODERANGE(str)); } } VALUE rb_str_subseq(VALUE str, long beg, long len) { VALUE str2; if (!STR_EMBEDDABLE_P(len, TERM_LEN(str)) && SHARABLE_SUBSTRING_P(beg, len, RSTRING_LEN(str))) { long olen; str2 = rb_str_new_shared(rb_str_new_frozen(str)); RSTRING(str2)->as.heap.ptr += beg; olen = RSTRING(str2)->as.heap.len; if (olen > len) RSTRING(str2)->as.heap.len = len; } else { str2 = rb_str_new_with_class(str, RSTRING_PTR(str)+beg, len); RB_GC_GUARD(str); } rb_enc_cr_str_copy_for_substr(str2, str); OBJ_INFECT(str2, str); return str2; } char * rb_str_subpos(VALUE str, long beg, long *lenp) { long len = *lenp; long slen = -1L; long blen = RSTRING_LEN(str); rb_encoding *enc = STR_ENC_GET(str); char *p, *s = RSTRING_PTR(str), *e = s + blen; if (len < 0) return 0; if (!blen) { len = 0; } if (single_byte_optimizable(str)) { if (beg > blen) return 0; if (beg < 0) { beg += blen; if (beg < 0) return 0; } if (len > blen - beg) len = blen - beg; if (len < 0) return 0; p = s + beg; goto end; } if (beg < 0) { if (len > -beg) len = -beg; if (-beg * rb_enc_mbmaxlen(enc) < RSTRING_LEN(str) / 8) { beg = -beg; while (beg-- > len && (e = rb_enc_prev_char(s, e, e, enc)) != 0); p = e; if (!p) return 0; while (len-- > 0 && (p = rb_enc_prev_char(s, p, e, enc)) != 0); if (!p) return 0; len = e - p; goto end; } else { slen = str_strlen(str, enc); beg += slen; if (beg < 0) return 0; p = s + beg; if (len == 0) goto end; } } else if (beg > 0 && beg > RSTRING_LEN(str)) { return 0; } if (len == 0) { if (beg > str_strlen(str, enc)) return 0; /* str's enc */ p = s + beg; } #ifdef NONASCII_MASK else if (ENC_CODERANGE(str) == ENC_CODERANGE_VALID && enc == rb_utf8_encoding()) { p = str_utf8_nth(s, e, &beg); if (beg > 0) return 0; len = str_utf8_offset(p, e, len); } #endif else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) { int char_sz = rb_enc_mbmaxlen(enc); p = s + beg * char_sz; if (p > e) { return 0; } else if (len * char_sz > e - p) len = e - p; else len *= char_sz; } else if ((p = str_nth_len(s, e, &beg, enc)) == e) { if (beg > 0) return 0; len = 0; } else { len = str_offset(p, e, len, enc, 0); } end: *lenp = len; RB_GC_GUARD(str); return p; } static VALUE str_substr(VALUE str, long beg, long len, int empty); VALUE rb_str_substr(VALUE str, long beg, long len) { return str_substr(str, beg, len, TRUE); } static VALUE str_substr(VALUE str, long beg, long len, int empty) { VALUE str2; char *p = rb_str_subpos(str, beg, &len); if (!p) return Qnil; if (!STR_EMBEDDABLE_P(len, TERM_LEN(str)) && SHARABLE_SUBSTRING_P(p, len, RSTRING_END(str))) { long ofs = p - RSTRING_PTR(str); str2 = rb_str_new_frozen(str); str2 = str_new_shared(rb_obj_class(str2), str2); RSTRING(str2)->as.heap.ptr += ofs; RSTRING(str2)->as.heap.len = len; } else { if (!len && !empty) return Qnil; str2 = rb_str_new_with_class(str, p, len); OBJ_INFECT(str2, str); RB_GC_GUARD(str); } rb_enc_cr_str_copy_for_substr(str2, str); return str2; } VALUE rb_str_freeze(VALUE str) { if (OBJ_FROZEN(str)) return str; rb_str_resize(str, RSTRING_LEN(str)); return rb_obj_freeze(str); } /* * call-seq: * +str -> str (mutable) * * If the string is frozen, then return duplicated mutable string. * * If the string is not frozen, then return the string itself. */ static VALUE str_uplus(VALUE str) { if (OBJ_FROZEN(str)) { return rb_str_dup(str); } else { return str; } } /* * call-seq: * -str -> str (frozen) * * If the string is frozen, then return the string itself. * * If the string is not frozen, return a frozen, possibly pre-existing * copy of it. */ static VALUE str_uminus(VALUE str) { if (OBJ_FROZEN(str)) { return str; } else { return rb_fstring(str); } } RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str)) #define rb_str_dup_frozen rb_str_new_frozen VALUE rb_str_locktmp(VALUE str) { if (FL_TEST(str, STR_TMPLOCK)) { rb_raise(rb_eRuntimeError, "temporal locking already locked string"); } FL_SET(str, STR_TMPLOCK); return str; } VALUE rb_str_unlocktmp(VALUE str) { if (!FL_TEST(str, STR_TMPLOCK)) { rb_raise(rb_eRuntimeError, "temporal unlocking already unlocked string"); } FL_UNSET(str, STR_TMPLOCK); return str; } RUBY_FUNC_EXPORTED VALUE rb_str_locktmp_ensure(VALUE str, VALUE (*func)(VALUE), VALUE arg) { rb_str_locktmp(str); return rb_ensure(func, arg, rb_str_unlocktmp, str); } void rb_str_set_len(VALUE str, long len) { long capa; const int termlen = TERM_LEN(str); str_modifiable(str); if (STR_SHARED_P(str)) { rb_raise(rb_eRuntimeError, "can't set length of shared string"); } if (len > (capa = (long)str_capacity(str, termlen)) || len < 0) { rb_bug("probable buffer overflow: %ld for %ld", len, capa); } STR_SET_LEN(str, len); TERM_FILL(&RSTRING_PTR(str)[len], termlen); } VALUE rb_str_resize(VALUE str, long len) { long slen; int independent; if (len < 0) { rb_raise(rb_eArgError, "negative string size (or size too big)"); } independent = str_independent(str); ENC_CODERANGE_CLEAR(str); slen = RSTRING_LEN(str); { long capa; const int termlen = TERM_LEN(str); if (STR_EMBED_P(str)) { if (len == slen) return str; if (STR_EMBEDDABLE_P(len, termlen)) { STR_SET_EMBED_LEN(str, len); TERM_FILL(RSTRING(str)->as.ary + len, termlen); return str; } str_make_independent_expand(str, slen, len - slen, termlen); } else if (STR_EMBEDDABLE_P(len, termlen)) { char *ptr = STR_HEAP_PTR(str); STR_SET_EMBED(str); if (slen > len) slen = len; if (slen > 0) MEMCPY(RSTRING(str)->as.ary, ptr, char, slen); TERM_FILL(RSTRING(str)->as.ary + len, termlen); STR_SET_EMBED_LEN(str, len); if (independent) ruby_xfree(ptr); return str; } else if (!independent) { if (len == slen) return str; str_make_independent_expand(str, slen, len - slen, termlen); } else if ((capa = RSTRING(str)->as.heap.aux.capa) < len || (capa - len) > (len < 1024 ? len : 1024)) { REALLOC_N(RSTRING(str)->as.heap.ptr, char, (size_t)len + termlen); RSTRING(str)->as.heap.aux.capa = len; } else if (len == slen) return str; RSTRING(str)->as.heap.len = len; TERM_FILL(RSTRING(str)->as.heap.ptr + len, termlen); /* sentinel */ } return str; } static VALUE str_buf_cat(VALUE str, const char *ptr, long len) { long capa, total, olen, off = -1; char *sptr; const int termlen = TERM_LEN(str); assert(termlen < RSTRING_EMBED_LEN_MAX + 1); /* < (LONG_MAX/2) */ RSTRING_GETMEM(str, sptr, olen); if (ptr >= sptr && ptr <= sptr + olen) { off = ptr - sptr; } rb_str_modify(str); if (len == 0) return 0; if (STR_EMBED_P(str)) { capa = RSTRING_EMBED_LEN_MAX + 1 - termlen; sptr = RSTRING(str)->as.ary; olen = RSTRING_EMBED_LEN(str); } else { capa = RSTRING(str)->as.heap.aux.capa; sptr = RSTRING(str)->as.heap.ptr; olen = RSTRING(str)->as.heap.len; } if (olen > LONG_MAX - len) { rb_raise(rb_eArgError, "string sizes too big"); } total = olen + len; if (capa < total) { if (total >= LONG_MAX / 2) { capa = total; } while (total > capa) { capa = 2 * capa + termlen; /* == 2*(capa+termlen)-termlen */ } RESIZE_CAPA_TERM(str, capa, termlen); sptr = RSTRING_PTR(str); } if (off != -1) { ptr = sptr + off; } memcpy(sptr + olen, ptr, len); STR_SET_LEN(str, total); TERM_FILL(sptr + total, termlen); /* sentinel */ return str; } #define str_buf_cat2(str, ptr) str_buf_cat((str), (ptr), strlen(ptr)) VALUE rb_str_cat(VALUE str, const char *ptr, long len) { if (len == 0) return str; if (len < 0) { rb_raise(rb_eArgError, "negative string size (or size too big)"); } return str_buf_cat(str, ptr, len); } VALUE rb_str_cat_cstr(VALUE str, const char *ptr) { must_not_null(ptr); return rb_str_buf_cat(str, ptr, strlen(ptr)); } RUBY_ALIAS_FUNCTION(rb_str_buf_cat(VALUE str, const char *ptr, long len), rb_str_cat, (str, ptr, len)) RUBY_ALIAS_FUNCTION(rb_str_buf_cat2(VALUE str, const char *ptr), rb_str_cat_cstr, (str, ptr)) RUBY_ALIAS_FUNCTION(rb_str_cat2(VALUE str, const char *ptr), rb_str_cat_cstr, (str, ptr)) static VALUE rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len, int ptr_encindex, int ptr_cr, int *ptr_cr_ret) { int str_encindex = ENCODING_GET(str); int res_encindex; int str_cr, res_cr; rb_encoding *str_enc, *ptr_enc; str_cr = RSTRING_LEN(str) ? ENC_CODERANGE(str) : ENC_CODERANGE_7BIT; if (str_encindex == ptr_encindex) { if (str_cr != ENC_CODERANGE_UNKNOWN && ptr_cr == ENC_CODERANGE_UNKNOWN) { ptr_cr = coderange_scan(ptr, len, rb_enc_from_index(ptr_encindex)); } } else { str_enc = rb_enc_from_index(str_encindex); ptr_enc = rb_enc_from_index(ptr_encindex); if (!rb_enc_asciicompat(str_enc) || !rb_enc_asciicompat(ptr_enc)) { if (len == 0) return str; if (RSTRING_LEN(str) == 0) { rb_str_buf_cat(str, ptr, len); ENCODING_CODERANGE_SET(str, ptr_encindex, ptr_cr); return str; } goto incompatible; } if (ptr_cr == ENC_CODERANGE_UNKNOWN) { ptr_cr = coderange_scan(ptr, len, ptr_enc); } if (str_cr == ENC_CODERANGE_UNKNOWN) { if (ENCODING_IS_ASCII8BIT(str) || ptr_cr != ENC_CODERANGE_7BIT) { str_cr = rb_enc_str_coderange(str); } } } if (ptr_cr_ret) *ptr_cr_ret = ptr_cr; if (str_encindex != ptr_encindex && str_cr != ENC_CODERANGE_7BIT && ptr_cr != ENC_CODERANGE_7BIT) { str_enc = rb_enc_from_index(str_encindex); ptr_enc = rb_enc_from_index(ptr_encindex); incompatible: rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s", rb_enc_name(str_enc), rb_enc_name(ptr_enc)); } if (str_cr == ENC_CODERANGE_UNKNOWN) { res_encindex = str_encindex; res_cr = ENC_CODERANGE_UNKNOWN; } else if (str_cr == ENC_CODERANGE_7BIT) { if (ptr_cr == ENC_CODERANGE_7BIT) { res_encindex = str_encindex; res_cr = ENC_CODERANGE_7BIT; } else { res_encindex = ptr_encindex; res_cr = ptr_cr; } } else if (str_cr == ENC_CODERANGE_VALID) { res_encindex = str_encindex; if (ENC_CODERANGE_CLEAN_P(ptr_cr)) res_cr = str_cr; else res_cr = ptr_cr; } else { /* str_cr == ENC_CODERANGE_BROKEN */ res_encindex = str_encindex; res_cr = str_cr; if (0 < len) res_cr = ENC_CODERANGE_UNKNOWN; } if (len < 0) { rb_raise(rb_eArgError, "negative string size (or size too big)"); } str_buf_cat(str, ptr, len); ENCODING_CODERANGE_SET(str, res_encindex, res_cr); return str; } VALUE rb_enc_str_buf_cat(VALUE str, const char *ptr, long len, rb_encoding *ptr_enc) { return rb_enc_cr_str_buf_cat(str, ptr, len, rb_enc_to_index(ptr_enc), ENC_CODERANGE_UNKNOWN, NULL); } VALUE rb_str_buf_cat_ascii(VALUE str, const char *ptr) { /* ptr must reference NUL terminated ASCII string. */ int encindex = ENCODING_GET(str); rb_encoding *enc = rb_enc_from_index(encindex); if (rb_enc_asciicompat(enc)) { return rb_enc_cr_str_buf_cat(str, ptr, strlen(ptr), encindex, ENC_CODERANGE_7BIT, 0); } else { char *buf = ALLOCA_N(char, rb_enc_mbmaxlen(enc)); while (*ptr) { unsigned int c = (unsigned char)*ptr; int len = rb_enc_codelen(c, enc); rb_enc_mbcput(c, buf, enc); rb_enc_cr_str_buf_cat(str, buf, len, encindex, ENC_CODERANGE_VALID, 0); ptr++; } return str; } } VALUE rb_str_buf_append(VALUE str, VALUE str2) { int str2_cr; str2_cr = ENC_CODERANGE(str2); rb_enc_cr_str_buf_cat(str, RSTRING_PTR(str2), RSTRING_LEN(str2), ENCODING_GET(str2), str2_cr, &str2_cr); OBJ_INFECT(str, str2); ENC_CODERANGE_SET(str2, str2_cr); return str; } VALUE rb_str_append(VALUE str, VALUE str2) { StringValue(str2); return rb_str_buf_append(str, str2); } #define MIN_PRE_ALLOC_SIZE 48 VALUE rb_str_concat_literals(size_t num, const VALUE *strary) { VALUE str; size_t i, s; long len = 1; if (UNLIKELY(!num)) return rb_str_new(0, 0); if (UNLIKELY(num == 1)) return rb_str_resurrect(strary[0]); for (i = 0; i < num; ++i) { len += RSTRING_LEN(strary[i]); } if (LIKELY(len < MIN_PRE_ALLOC_SIZE)) { str = rb_str_resurrect(strary[0]); s = 1; } else { str = rb_str_buf_new(len); rb_enc_copy(str, strary[0]); s = 0; } for (i = s; i < num; ++i) { const VALUE v = strary[i]; int encidx = ENCODING_GET(v); rb_enc_cr_str_buf_cat(str, RSTRING_PTR(v), RSTRING_LEN(v), encidx, ENC_CODERANGE(v), NULL); OBJ_INFECT_RAW(str, v); if (encidx != ENCINDEX_US_ASCII) { if (ENCODING_GET_INLINED(str) == ENCINDEX_US_ASCII) rb_enc_set_index(str, encidx); } } return str; } /* * call-seq: * str.concat(obj1, obj2,...) -> str * * Concatenates the given object(s) to str. If an object is an * Integer, it is considered a codepoint and converted * to a character before concatenation. * * +concat+ can take multiple arguments, and all the arguments are * concatenated in order. * * a = "hello " * a.concat("world", 33) #=> "hello world!" * a #=> "hello world!" * * b = "sn" * b.concat("_", b, "_", b) #=> "sn_sn_sn" * * See also String#<<, which takes a single argument. */ static VALUE rb_str_concat_multi(int argc, VALUE *argv, VALUE str) { str_modifiable(str); if (argc == 1) { return rb_str_concat(str, argv[0]); } else if (argc > 1) { int i; VALUE arg_str = rb_str_tmp_new(0); rb_enc_copy(arg_str, str); for (i = 0; i < argc; i++) { rb_str_concat(arg_str, argv[i]); } rb_str_buf_append(str, arg_str); } return str; } /* * call-seq: * str << obj -> str * str << integer -> str * * Appends the given object to str. If the object is an * Integer, it is considered a codepoint and converted * to a character before being appended. * * a = "hello " * a << "world" #=> "hello world" * a << 33 #=> "hello world!" * * See also String#concat, which takes multiple arguments. */ VALUE rb_str_concat(VALUE str1, VALUE str2) { unsigned int code; rb_encoding *enc = STR_ENC_GET(str1); int encidx; if (RB_INTEGER_TYPE_P(str2)) { if (rb_num_to_uint(str2, &code) == 0) { } else if (FIXNUM_P(str2)) { rb_raise(rb_eRangeError, "%ld out of char range", FIX2LONG(str2)); } else { rb_raise(rb_eRangeError, "bignum out of char range"); } } else { return rb_str_append(str1, str2); } encidx = rb_enc_to_index(enc); if (encidx == ENCINDEX_ASCII || encidx == ENCINDEX_US_ASCII) { /* US-ASCII automatically extended to ASCII-8BIT */ char buf[1]; buf[0] = (char)code; if (code > 0xFF) { rb_raise(rb_eRangeError, "%u out of char range", code); } rb_str_cat(str1, buf, 1); if (encidx == ENCINDEX_US_ASCII && code > 127) { rb_enc_associate_index(str1, ENCINDEX_ASCII); ENC_CODERANGE_SET(str1, ENC_CODERANGE_VALID); } } else { long pos = RSTRING_LEN(str1); int cr = ENC_CODERANGE(str1); int len; char *buf; switch (len = rb_enc_codelen(code, enc)) { case ONIGERR_INVALID_CODE_POINT_VALUE: rb_raise(rb_eRangeError, "invalid codepoint 0x%X in %s", code, rb_enc_name(enc)); break; case ONIGERR_TOO_BIG_WIDE_CHAR_VALUE: case 0: rb_raise(rb_eRangeError, "%u out of char range", code); break; } buf = ALLOCA_N(char, len + 1); rb_enc_mbcput(code, buf, enc); if (rb_enc_precise_mbclen(buf, buf + len + 1, enc) != len) { rb_raise(rb_eRangeError, "invalid codepoint 0x%X in %s", code, rb_enc_name(enc)); } rb_str_resize(str1, pos+len); memcpy(RSTRING_PTR(str1) + pos, buf, len); if (cr == ENC_CODERANGE_7BIT && code > 127) cr = ENC_CODERANGE_VALID; ENC_CODERANGE_SET(str1, cr); } return str1; } /* * call-seq: * str.prepend(other_str1, other_str2,...) -> str * * Prepend---Prepend the given strings to str. * * a = "!" * a.prepend("hello ", "world") #=> "hello world!" * a #=> "hello world!" * * See also String#concat. */ static VALUE rb_str_prepend_multi(int argc, VALUE *argv, VALUE str) { str_modifiable(str); if (argc == 1) { rb_str_update(str, 0L, 0L, argv[0]); } else if (argc > 1) { int i; VALUE arg_str = rb_str_tmp_new(0); rb_enc_copy(arg_str, str); for (i = 0; i < argc; i++) { rb_str_append(arg_str, argv[i]); } rb_str_update(str, 0L, 0L, arg_str); } return str; } st_index_t rb_str_hash(VALUE str) { int e = ENCODING_GET(str); if (e && rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT) { e = 0; } return rb_memhash((const void *)RSTRING_PTR(str), RSTRING_LEN(str)) ^ e; } int rb_str_hash_cmp(VALUE str1, VALUE str2) { long len1, len2; const char *ptr1, *ptr2; RSTRING_GETMEM(str1, ptr1, len1); RSTRING_GETMEM(str2, ptr2, len2); return (len1 != len2 || !rb_str_comparable(str1, str2) || memcmp(ptr1, ptr2, len1) != 0); } /* * call-seq: * str.hash -> integer * * Return a hash based on the string's length, content and encoding. * * See also Object#hash. */ static VALUE rb_str_hash_m(VALUE str) { st_index_t hval = rb_str_hash(str); return ST2FIX(hval); } #define lesser(a,b) (((a)>(b))?(b):(a)) int rb_str_comparable(VALUE str1, VALUE str2) { int idx1, idx2; int rc1, rc2; if (RSTRING_LEN(str1) == 0) return TRUE; if (RSTRING_LEN(str2) == 0) return TRUE; idx1 = ENCODING_GET(str1); idx2 = ENCODING_GET(str2); if (idx1 == idx2) return TRUE; rc1 = rb_enc_str_coderange(str1); rc2 = rb_enc_str_coderange(str2); if (rc1 == ENC_CODERANGE_7BIT) { if (rc2 == ENC_CODERANGE_7BIT) return TRUE; if (rb_enc_asciicompat(rb_enc_from_index(idx2))) return TRUE; } if (rc2 == ENC_CODERANGE_7BIT) { if (rb_enc_asciicompat(rb_enc_from_index(idx1))) return TRUE; } return FALSE; } int rb_str_cmp(VALUE str1, VALUE str2) { long len1, len2; const char *ptr1, *ptr2; int retval; if (str1 == str2) return 0; RSTRING_GETMEM(str1, ptr1, len1); RSTRING_GETMEM(str2, ptr2, len2); if (ptr1 == ptr2 || (retval = memcmp(ptr1, ptr2, lesser(len1, len2))) == 0) { if (len1 == len2) { if (!rb_str_comparable(str1, str2)) { if (ENCODING_GET(str1) > ENCODING_GET(str2)) return 1; return -1; } return 0; } if (len1 > len2) return 1; return -1; } if (retval > 0) return 1; return -1; } /* expect tail call optimization */ static VALUE str_eql(const VALUE str1, const VALUE str2) { const long len = RSTRING_LEN(str1); const char *ptr1, *ptr2; if (len != RSTRING_LEN(str2)) return Qfalse; if (!rb_str_comparable(str1, str2)) return Qfalse; if ((ptr1 = RSTRING_PTR(str1)) == (ptr2 = RSTRING_PTR(str2))) return Qtrue; if (memcmp(ptr1, ptr2, len) == 0) return Qtrue; return Qfalse; } /* * call-seq: * str == obj -> true or false * str === obj -> true or false * * Equality---Returns whether +str+ == +obj+, similar to Object#==. * * If +obj+ is not an instance of String but responds to +to_str+, then the * two strings are compared using obj.==. * * Otherwise, returns similarly to String#eql?, comparing length and content. */ VALUE rb_str_equal(VALUE str1, VALUE str2) { if (str1 == str2) return Qtrue; if (!RB_TYPE_P(str2, T_STRING)) { if (!rb_respond_to(str2, idTo_str)) { return Qfalse; } return rb_equal(str2, str1); } return str_eql(str1, str2); } /* * call-seq: * str.eql?(other) -> true or false * * Two strings are equal if they have the same length and content. */ VALUE rb_str_eql(VALUE str1, VALUE str2) { if (str1 == str2) return Qtrue; if (!RB_TYPE_P(str2, T_STRING)) return Qfalse; return str_eql(str1, str2); } /* * call-seq: * string <=> other_string -> -1, 0, +1, or nil * * Comparison---Returns -1, 0, +1, or +nil+ depending on whether +string+ is * less than, equal to, or greater than +other_string+. * * +nil+ is returned if the two values are incomparable. * * If the strings are of different lengths, and the strings are equal when * compared up to the shortest length, then the longer string is considered * greater than the shorter one. * * <=> is the basis for the methods <, * <=, >, >=, and * between?, included from module Comparable. The method * String#== does not use Comparable#==. * * "abcdef" <=> "abcde" #=> 1 * "abcdef" <=> "abcdef" #=> 0 * "abcdef" <=> "abcdefg" #=> -1 * "abcdef" <=> "ABCDEF" #=> 1 * "abcdef" <=> 1 #=> nil */ static VALUE rb_str_cmp_m(VALUE str1, VALUE str2) { int result; VALUE s = rb_check_string_type(str2); if (NIL_P(s)) { return rb_invcmp(str1, str2); } result = rb_str_cmp(str1, s); return INT2FIX(result); } static VALUE str_casecmp(VALUE str1, VALUE str2); static VALUE str_casecmp_p(VALUE str1, VALUE str2); /* * call-seq: * str.casecmp(other_str) -> -1, 0, +1, or nil * * Case-insensitive version of String#<=>. * Currently, case-insensitivity only works on characters A-Z/a-z, * not all of Unicode. This is different from String#casecmp?. * * "aBcDeF".casecmp("abcde") #=> 1 * "aBcDeF".casecmp("abcdef") #=> 0 * "aBcDeF".casecmp("abcdefg") #=> -1 * "abcdef".casecmp("ABCDEF") #=> 0 * * +nil+ is returned if the two strings have incompatible encodings, * or if +other_str+ is not a string. * * "foo".casecmp(2) #=> nil * "\u{e4 f6 fc}".encode("ISO-8859-1").casecmp("\u{c4 d6 dc}") #=> nil */ static VALUE rb_str_casecmp(VALUE str1, VALUE str2) { VALUE s = rb_check_string_type(str2); if (NIL_P(s)) { return Qnil; } return str_casecmp(str1, s); } static VALUE str_casecmp(VALUE str1, VALUE str2) { long len; rb_encoding *enc; char *p1, *p1end, *p2, *p2end; enc = rb_enc_compatible(str1, str2); if (!enc) { return Qnil; } p1 = RSTRING_PTR(str1); p1end = RSTRING_END(str1); p2 = RSTRING_PTR(str2); p2end = RSTRING_END(str2); if (single_byte_optimizable(str1) && single_byte_optimizable(str2)) { while (p1 < p1end && p2 < p2end) { if (*p1 != *p2) { unsigned int c1 = TOUPPER(*p1 & 0xff); unsigned int c2 = TOUPPER(*p2 & 0xff); if (c1 != c2) return INT2FIX(c1 < c2 ? -1 : 1); } p1++; p2++; } } else { while (p1 < p1end && p2 < p2end) { int l1, c1 = rb_enc_ascget(p1, p1end, &l1, enc); int l2, c2 = rb_enc_ascget(p2, p2end, &l2, enc); if (0 <= c1 && 0 <= c2) { c1 = TOUPPER(c1); c2 = TOUPPER(c2); if (c1 != c2) return INT2FIX(c1 < c2 ? -1 : 1); } else { int r; l1 = rb_enc_mbclen(p1, p1end, enc); l2 = rb_enc_mbclen(p2, p2end, enc); len = l1 < l2 ? l1 : l2; r = memcmp(p1, p2, len); if (r != 0) return INT2FIX(r < 0 ? -1 : 1); if (l1 != l2) return INT2FIX(l1 < l2 ? -1 : 1); } p1 += l1; p2 += l2; } } if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) return INT2FIX(0); if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return INT2FIX(1); return INT2FIX(-1); } /* * call-seq: * str.casecmp?(other_str) -> true, false, or nil * * Returns +true+ if +str+ and +other_str+ are equal after * Unicode case folding, +false+ if they are not equal. * * "aBcDeF".casecmp?("abcde") #=> false * "aBcDeF".casecmp?("abcdef") #=> true * "aBcDeF".casecmp?("abcdefg") #=> false * "abcdef".casecmp?("ABCDEF") #=> true * "\u{e4 f6 fc}".casecmp?("\u{c4 d6 dc}") #=> true * * +nil+ is returned if the two strings have incompatible encodings, * or if +other_str+ is not a string. * * "foo".casecmp?(2) #=> nil * "\u{e4 f6 fc}".encode("ISO-8859-1").casecmp?("\u{c4 d6 dc}") #=> nil */ static VALUE rb_str_casecmp_p(VALUE str1, VALUE str2) { VALUE s = rb_check_string_type(str2); if (NIL_P(s)) { return Qnil; } return str_casecmp_p(str1, s); } static VALUE str_casecmp_p(VALUE str1, VALUE str2) { rb_encoding *enc; VALUE folded_str1, folded_str2; VALUE fold_opt = sym_fold; enc = rb_enc_compatible(str1, str2); if (!enc) { return Qnil; } folded_str1 = rb_str_downcase(1, &fold_opt, str1); folded_str2 = rb_str_downcase(1, &fold_opt, str2); return rb_str_eql(folded_str1, folded_str2); } static long strseq_core(const char *str_ptr, const char *str_ptr_end, long str_len, const char *sub_ptr, long sub_len, long offset, rb_encoding *enc) { const char *search_start = str_ptr; long pos, search_len = str_len - offset; for (;;) { const char *t; pos = rb_memsearch(sub_ptr, sub_len, search_start, search_len, enc); if (pos < 0) return pos; t = rb_enc_right_char_head(search_start, search_start+pos, str_ptr_end, enc); if (t == search_start + pos) break; search_len -= t - search_start; if (search_len <= 0) return -1; offset += t - search_start; search_start = t; } return pos + offset; } #define rb_str_index(str, sub, offset) rb_strseq_index(str, sub, offset, 0) static long rb_strseq_index(VALUE str, VALUE sub, long offset, int in_byte) { const char *str_ptr, *str_ptr_end, *sub_ptr; long str_len, sub_len; int single_byte = single_byte_optimizable(str); rb_encoding *enc; enc = rb_enc_check(str, sub); if (is_broken_string(sub)) return -1; str_ptr = RSTRING_PTR(str); str_ptr_end = RSTRING_END(str); str_len = RSTRING_LEN(str); sub_ptr = RSTRING_PTR(sub); sub_len = RSTRING_LEN(sub); if (str_len < sub_len) return -1; if (offset != 0) { long str_len_char, sub_len_char; str_len_char = (in_byte || single_byte) ? str_len : str_strlen(str, enc); sub_len_char = in_byte ? sub_len : str_strlen(sub, enc); if (offset < 0) { offset += str_len_char; if (offset < 0) return -1; } if (str_len_char - offset < sub_len_char) return -1; if (!in_byte) offset = str_offset(str_ptr, str_ptr_end, offset, enc, single_byte); str_ptr += offset; } if (sub_len == 0) return offset; /* need proceed one character at a time */ return strseq_core(str_ptr, str_ptr_end, str_len, sub_ptr, sub_len, offset, enc); } /* * call-seq: * str.index(substring [, offset]) -> integer or nil * str.index(regexp [, offset]) -> integer or nil * * Returns the index of the first occurrence of the given substring or * pattern (regexp) in str. Returns nil if not * found. If the second parameter is present, it specifies the position in the * string to begin the search. * * "hello".index('e') #=> 1 * "hello".index('lo') #=> 3 * "hello".index('a') #=> nil * "hello".index(?e) #=> 1 * "hello".index(/[aeiou]/, -3) #=> 4 */ static VALUE rb_str_index_m(int argc, VALUE *argv, VALUE str) { VALUE sub; VALUE initpos; long pos; if (rb_scan_args(argc, argv, "11", &sub, &initpos) == 2) { pos = NUM2LONG(initpos); } else { pos = 0; } if (pos < 0) { pos += str_strlen(str, NULL); if (pos < 0) { if (RB_TYPE_P(sub, T_REGEXP)) { rb_backref_set(Qnil); } return Qnil; } } if (SPECIAL_CONST_P(sub)) goto generic; switch (BUILTIN_TYPE(sub)) { case T_REGEXP: if (pos > str_strlen(str, NULL)) return Qnil; pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos, rb_enc_check(str, sub), single_byte_optimizable(str)); pos = rb_reg_search(sub, str, pos, 0); pos = rb_str_sublen(str, pos); break; generic: default: { VALUE tmp; tmp = rb_check_string_type(sub); if (NIL_P(tmp)) { rb_raise(rb_eTypeError, "type mismatch: %s given", rb_obj_classname(sub)); } sub = tmp; } /* fall through */ case T_STRING: pos = rb_str_index(str, sub, pos); pos = rb_str_sublen(str, pos); break; } if (pos == -1) return Qnil; return LONG2NUM(pos); } #ifdef HAVE_MEMRCHR static long str_rindex(VALUE str, VALUE sub, const char *s, long pos, rb_encoding *enc) { char *hit, *adjusted; int c; long slen, searchlen; char *sbeg, *e, *t; slen = RSTRING_LEN(sub); if (slen == 0) return pos; sbeg = RSTRING_PTR(str); e = RSTRING_END(str); t = RSTRING_PTR(sub); c = *t & 0xff; searchlen = s - sbeg + 1; do { hit = memrchr(sbeg, c, searchlen); if (!hit) break; adjusted = rb_enc_left_char_head(sbeg, hit, e, enc); if (hit != adjusted) { searchlen = adjusted - sbeg; continue; } if (memcmp(hit, t, slen) == 0) return rb_str_sublen(str, hit - sbeg); searchlen = adjusted - sbeg; } while (searchlen > 0); return -1; } #else static long str_rindex(VALUE str, VALUE sub, const char *s, long pos, rb_encoding *enc) { long slen; char *sbeg, *e, *t; sbeg = RSTRING_PTR(str); e = RSTRING_END(str); t = RSTRING_PTR(sub); slen = RSTRING_LEN(sub); while (s) { if (memcmp(s, t, slen) == 0) { return pos; } if (pos == 0) break; pos--; s = rb_enc_prev_char(sbeg, s, e, enc); } return -1; } #endif static long rb_str_rindex(VALUE str, VALUE sub, long pos) { long len, slen; char *sbeg, *s; rb_encoding *enc; int singlebyte; enc = rb_enc_check(str, sub); if (is_broken_string(sub)) return -1; singlebyte = single_byte_optimizable(str); len = singlebyte ? RSTRING_LEN(str) : str_strlen(str, enc); /* rb_enc_check */ slen = str_strlen(sub, enc); /* rb_enc_check */ /* substring longer than string */ if (len < slen) return -1; if (len - pos < slen) pos = len - slen; if (len == 0) return pos; sbeg = RSTRING_PTR(str); if (pos == 0) { if (memcmp(sbeg, RSTRING_PTR(sub), RSTRING_LEN(sub)) == 0) return 0; else return -1; } s = str_nth(sbeg, RSTRING_END(str), pos, enc, singlebyte); return str_rindex(str, sub, s, pos, enc); } /* * call-seq: * str.rindex(substring [, integer]) -> integer or nil * str.rindex(regexp [, integer]) -> integer or nil * * Returns the index of the last occurrence of the given substring or * pattern (regexp) in str. Returns nil if not * found. If the second parameter is present, it specifies the position in the * string to end the search---characters beyond this point will not be * considered. * * "hello".rindex('e') #=> 1 * "hello".rindex('l') #=> 3 * "hello".rindex('a') #=> nil * "hello".rindex(?e) #=> 1 * "hello".rindex(/[aeiou]/, -2) #=> 1 */ static VALUE rb_str_rindex_m(int argc, VALUE *argv, VALUE str) { VALUE sub; VALUE vpos; rb_encoding *enc = STR_ENC_GET(str); long pos, len = str_strlen(str, enc); /* str's enc */ if (rb_scan_args(argc, argv, "11", &sub, &vpos) == 2) { pos = NUM2LONG(vpos); if (pos < 0) { pos += len; if (pos < 0) { if (RB_TYPE_P(sub, T_REGEXP)) { rb_backref_set(Qnil); } return Qnil; } } if (pos > len) pos = len; } else { pos = len; } if (SPECIAL_CONST_P(sub)) goto generic; switch (BUILTIN_TYPE(sub)) { case T_REGEXP: /* enc = rb_get_check(str, sub); */ pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos, enc, single_byte_optimizable(str)); pos = rb_reg_search(sub, str, pos, 1); pos = rb_str_sublen(str, pos); if (pos >= 0) return LONG2NUM(pos); break; generic: default: { VALUE tmp; tmp = rb_check_string_type(sub); if (NIL_P(tmp)) { rb_raise(rb_eTypeError, "type mismatch: %s given", rb_obj_classname(sub)); } sub = tmp; } /* fall through */ case T_STRING: pos = rb_str_rindex(str, sub, pos); if (pos >= 0) return LONG2NUM(pos); break; } return Qnil; } /* * call-seq: * str =~ obj -> integer or nil * * Match---If obj is a Regexp, use it as a pattern to match * against str,and returns the position the match starts, or * nil if there is no match. Otherwise, invokes * obj.=~, passing str as an argument. The default * =~ in Object returns nil. * * Note: str =~ regexp is not the same as * regexp =~ str. Strings captured from named capture groups * are assigned to local variables only in the second case. * * "cat o' 9 tails" =~ /\d/ #=> 7 * "cat o' 9 tails" =~ 9 #=> nil */ static VALUE rb_str_match(VALUE x, VALUE y) { if (SPECIAL_CONST_P(y)) goto generic; switch (BUILTIN_TYPE(y)) { case T_STRING: rb_raise(rb_eTypeError, "type mismatch: String given"); case T_REGEXP: return rb_reg_match(y, x); generic: default: return rb_funcall(y, idEqTilde, 1, x); } } static VALUE get_pat(VALUE); /* * call-seq: * str.match(pattern) -> matchdata or nil * str.match(pattern, pos) -> matchdata or nil * * Converts pattern to a Regexp (if it isn't already one), * then invokes its match method on str. If the second * parameter is present, it specifies the position in the string to begin the * search. * * 'hello'.match('(.)\1') #=> # * 'hello'.match('(.)\1')[0] #=> "ll" * 'hello'.match(/(.)\1/)[0] #=> "ll" * 'hello'.match(/(.)\1/, 3) #=> nil * 'hello'.match('xx') #=> nil * * If a block is given, invoke the block with MatchData if match succeed, so * that you can write * * str.match(pat) {|m| ...} * * instead of * * if m = str.match(pat) * ... * end * * The return value is a value from block execution in this case. */ static VALUE rb_str_match_m(int argc, VALUE *argv, VALUE str) { VALUE re, result; if (argc < 1) rb_check_arity(argc, 1, 2); re = argv[0]; argv[0] = str; result = rb_funcallv(get_pat(re), rb_intern("match"), argc, argv); if (!NIL_P(result) && rb_block_given_p()) { return rb_yield(result); } return result; } /* * call-seq: * str.match?(pattern) -> true or false * str.match?(pattern, pos) -> true or false * * Converts _pattern_ to a +Regexp+ (if it isn't already one), then * returns a +true+ or +false+ indicates whether the regexp is * matched _str_ or not without updating $~ and other * related variables. If the second parameter is present, it * specifies the position in the string to begin the search. * * "Ruby".match?(/R.../) #=> true * "Ruby".match?(/R.../, 1) #=> false * "Ruby".match?(/P.../) #=> false * $& #=> nil */ static VALUE rb_str_match_m_p(int argc, VALUE *argv, VALUE str) { VALUE re; rb_check_arity(argc, 1, 2); re = get_pat(argv[0]); return rb_reg_match_p(re, str, argc > 1 ? NUM2LONG(argv[1]) : 0); } enum neighbor_char { NEIGHBOR_NOT_CHAR, NEIGHBOR_FOUND, NEIGHBOR_WRAPPED }; static enum neighbor_char enc_succ_char(char *p, long len, rb_encoding *enc) { long i; int l; if (rb_enc_mbminlen(enc) > 1) { /* wchar, trivial case */ int r = rb_enc_precise_mbclen(p, p + len, enc), c; if (!MBCLEN_CHARFOUND_P(r)) { return NEIGHBOR_NOT_CHAR; } c = rb_enc_mbc_to_codepoint(p, p + len, enc) + 1; l = rb_enc_code_to_mbclen(c, enc); if (!l) return NEIGHBOR_NOT_CHAR; if (l != len) return NEIGHBOR_WRAPPED; rb_enc_mbcput(c, p, enc); r = rb_enc_precise_mbclen(p, p + len, enc); if (!MBCLEN_CHARFOUND_P(r)) { return NEIGHBOR_NOT_CHAR; } return NEIGHBOR_FOUND; } while (1) { for (i = len-1; 0 <= i && (unsigned char)p[i] == 0xff; i--) p[i] = '\0'; if (i < 0) return NEIGHBOR_WRAPPED; ++((unsigned char*)p)[i]; l = rb_enc_precise_mbclen(p, p+len, enc); if (MBCLEN_CHARFOUND_P(l)) { l = MBCLEN_CHARFOUND_LEN(l); if (l == len) { return NEIGHBOR_FOUND; } else { memset(p+l, 0xff, len-l); } } if (MBCLEN_INVALID_P(l) && i < len-1) { long len2; int l2; for (len2 = len-1; 0 < len2; len2--) { l2 = rb_enc_precise_mbclen(p, p+len2, enc); if (!MBCLEN_INVALID_P(l2)) break; } memset(p+len2+1, 0xff, len-(len2+1)); } } } static enum neighbor_char enc_pred_char(char *p, long len, rb_encoding *enc) { long i; int l; if (rb_enc_mbminlen(enc) > 1) { /* wchar, trivial case */ int r = rb_enc_precise_mbclen(p, p + len, enc), c; if (!MBCLEN_CHARFOUND_P(r)) { return NEIGHBOR_NOT_CHAR; } c = rb_enc_mbc_to_codepoint(p, p + len, enc); if (!c) return NEIGHBOR_NOT_CHAR; --c; l = rb_enc_code_to_mbclen(c, enc); if (!l) return NEIGHBOR_NOT_CHAR; if (l != len) return NEIGHBOR_WRAPPED; rb_enc_mbcput(c, p, enc); r = rb_enc_precise_mbclen(p, p + len, enc); if (!MBCLEN_CHARFOUND_P(r)) { return NEIGHBOR_NOT_CHAR; } return NEIGHBOR_FOUND; } while (1) { for (i = len-1; 0 <= i && (unsigned char)p[i] == 0; i--) p[i] = '\xff'; if (i < 0) return NEIGHBOR_WRAPPED; --((unsigned char*)p)[i]; l = rb_enc_precise_mbclen(p, p+len, enc); if (MBCLEN_CHARFOUND_P(l)) { l = MBCLEN_CHARFOUND_LEN(l); if (l == len) { return NEIGHBOR_FOUND; } else { memset(p+l, 0, len-l); } } if (MBCLEN_INVALID_P(l) && i < len-1) { long len2; int l2; for (len2 = len-1; 0 < len2; len2--) { l2 = rb_enc_precise_mbclen(p, p+len2, enc); if (!MBCLEN_INVALID_P(l2)) break; } memset(p+len2+1, 0, len-(len2+1)); } } } /* overwrite +p+ by succeeding letter in +enc+ and returns NEIGHBOR_FOUND or NEIGHBOR_WRAPPED. When NEIGHBOR_WRAPPED, carried-out letter is stored into carry. assuming each ranges are successive, and mbclen never change in each ranges. NEIGHBOR_NOT_CHAR is returned if invalid character or the range has only one character. */ static enum neighbor_char enc_succ_alnum_char(char *p, long len, rb_encoding *enc, char *carry) { enum neighbor_char ret; unsigned int c; int ctype; int range; char save[ONIGENC_CODE_TO_MBC_MAXLEN]; /* skip 03A2, invalid char between GREEK CAPITAL LETTERS */ int try; const int max_gaps = 1; c = rb_enc_mbc_to_codepoint(p, p+len, enc); if (rb_enc_isctype(c, ONIGENC_CTYPE_DIGIT, enc)) ctype = ONIGENC_CTYPE_DIGIT; else if (rb_enc_isctype(c, ONIGENC_CTYPE_ALPHA, enc)) ctype = ONIGENC_CTYPE_ALPHA; else return NEIGHBOR_NOT_CHAR; MEMCPY(save, p, char, len); for (try = 0; try <= max_gaps; ++try) { ret = enc_succ_char(p, len, enc); if (ret == NEIGHBOR_FOUND) { c = rb_enc_mbc_to_codepoint(p, p+len, enc); if (rb_enc_isctype(c, ctype, enc)) return NEIGHBOR_FOUND; } } MEMCPY(p, save, char, len); range = 1; while (1) { MEMCPY(save, p, char, len); ret = enc_pred_char(p, len, enc); if (ret == NEIGHBOR_FOUND) { c = rb_enc_mbc_to_codepoint(p, p+len, enc); if (!rb_enc_isctype(c, ctype, enc)) { MEMCPY(p, save, char, len); break; } } else { MEMCPY(p, save, char, len); break; } range++; } if (range == 1) { return NEIGHBOR_NOT_CHAR; } if (ctype != ONIGENC_CTYPE_DIGIT) { MEMCPY(carry, p, char, len); return NEIGHBOR_WRAPPED; } MEMCPY(carry, p, char, len); enc_succ_char(carry, len, enc); return NEIGHBOR_WRAPPED; } static VALUE str_succ(VALUE str); /* * call-seq: * str.succ -> new_str * str.next -> new_str * * Returns the successor to str. The successor is calculated by * incrementing characters starting from the rightmost alphanumeric (or * the rightmost character if there are no alphanumerics) in the * string. Incrementing a digit always results in another digit, and * incrementing a letter results in another letter of the same case. * Incrementing nonalphanumerics uses the underlying character set's * collating sequence. * * If the increment generates a ``carry,'' the character to the left of * it is incremented. This process repeats until there is no carry, * adding an additional character if necessary. * * "abcd".succ #=> "abce" * "THX1138".succ #=> "THX1139" * "<>".succ #=> "<>" * "1999zzz".succ #=> "2000aaa" * "ZZZ9999".succ #=> "AAAA0000" * "***".succ #=> "**+" */ VALUE rb_str_succ(VALUE orig) { VALUE str; str = rb_str_new_with_class(orig, RSTRING_PTR(orig), RSTRING_LEN(orig)); rb_enc_cr_str_copy_for_substr(str, orig); OBJ_INFECT(str, orig); return str_succ(str); } static VALUE str_succ(VALUE str) { rb_encoding *enc; char *sbeg, *s, *e, *last_alnum = 0; int c = -1; long l, slen; char carry[ONIGENC_CODE_TO_MBC_MAXLEN] = "\1"; long carry_pos = 0, carry_len = 1; enum neighbor_char neighbor = NEIGHBOR_FOUND; slen = RSTRING_LEN(str); if (slen == 0) return str; enc = STR_ENC_GET(str); sbeg = RSTRING_PTR(str); s = e = sbeg + slen; while ((s = rb_enc_prev_char(sbeg, s, e, enc)) != 0) { if (neighbor == NEIGHBOR_NOT_CHAR && last_alnum) { if (ISALPHA(*last_alnum) ? ISDIGIT(*s) : ISDIGIT(*last_alnum) ? ISALPHA(*s) : 0) { s = last_alnum; break; } } l = rb_enc_precise_mbclen(s, e, enc); if (!ONIGENC_MBCLEN_CHARFOUND_P(l)) continue; l = ONIGENC_MBCLEN_CHARFOUND_LEN(l); neighbor = enc_succ_alnum_char(s, l, enc, carry); switch (neighbor) { case NEIGHBOR_NOT_CHAR: continue; case NEIGHBOR_FOUND: return str; case NEIGHBOR_WRAPPED: last_alnum = s; break; } c = 1; carry_pos = s - sbeg; carry_len = l; } if (c == -1) { /* str contains no alnum */ s = e; while ((s = rb_enc_prev_char(sbeg, s, e, enc)) != 0) { enum neighbor_char neighbor; char tmp[ONIGENC_CODE_TO_MBC_MAXLEN]; l = rb_enc_precise_mbclen(s, e, enc); if (!ONIGENC_MBCLEN_CHARFOUND_P(l)) continue; l = ONIGENC_MBCLEN_CHARFOUND_LEN(l); MEMCPY(tmp, s, char, l); neighbor = enc_succ_char(tmp, l, enc); switch (neighbor) { case NEIGHBOR_FOUND: MEMCPY(s, tmp, char, l); return str; break; case NEIGHBOR_WRAPPED: MEMCPY(s, tmp, char, l); break; case NEIGHBOR_NOT_CHAR: break; } if (rb_enc_precise_mbclen(s, s+l, enc) != l) { /* wrapped to \0...\0. search next valid char. */ enc_succ_char(s, l, enc); } if (!rb_enc_asciicompat(enc)) { MEMCPY(carry, s, char, l); carry_len = l; } carry_pos = s - sbeg; } ENC_CODERANGE_SET(str, ENC_CODERANGE_UNKNOWN); } RESIZE_CAPA(str, slen + carry_len); sbeg = RSTRING_PTR(str); s = sbeg + carry_pos; memmove(s + carry_len, s, slen - carry_pos); memmove(s, carry, carry_len); slen += carry_len; STR_SET_LEN(str, slen); TERM_FILL(&sbeg[slen], rb_enc_mbminlen(enc)); rb_enc_str_coderange(str); return str; } /* * call-seq: * str.succ! -> str * str.next! -> str * * Equivalent to String#succ, but modifies the receiver in * place. */ static VALUE rb_str_succ_bang(VALUE str) { rb_str_modify(str); str_succ(str); return str; } static int all_digits_p(const char *s, long len) { while (len-- > 0) { if (!ISDIGIT(*s)) return 0; s++; } return 1; } static VALUE str_upto_each(VALUE beg, VALUE end, int excl, int (*each)(VALUE, VALUE), VALUE); static int str_upto_i(VALUE str, VALUE arg) { rb_yield(str); return 0; } /* * call-seq: * str.upto(other_str, exclusive=false) {|s| block } -> str * str.upto(other_str, exclusive=false) -> an_enumerator * * Iterates through successive values, starting at str and * ending at other_str inclusive, passing each value in turn to * the block. The String#succ method is used to generate * each value. If optional second argument exclusive is omitted or is false, * the last value will be included; otherwise it will be excluded. * * If no block is given, an enumerator is returned instead. * * "a8".upto("b6") {|s| print s, ' ' } * for s in "a8".."b6" * print s, ' ' * end * * produces: * * a8 a9 b0 b1 b2 b3 b4 b5 b6 * a8 a9 b0 b1 b2 b3 b4 b5 b6 * * If str and other_str contains only ascii numeric characters, * both are recognized as decimal numbers. In addition, the width of * string (e.g. leading zeros) is handled appropriately. * * "9".upto("11").to_a #=> ["9", "10", "11"] * "25".upto("5").to_a #=> [] * "07".upto("11").to_a #=> ["07", "08", "09", "10", "11"] */ static VALUE rb_str_upto(int argc, VALUE *argv, VALUE beg) { VALUE end, exclusive; rb_scan_args(argc, argv, "11", &end, &exclusive); RETURN_ENUMERATOR(beg, argc, argv); return str_upto_each(beg, end, RTEST(exclusive), str_upto_i, Qnil); } static VALUE str_upto_each(VALUE beg, VALUE end, int excl, int (*each)(VALUE, VALUE), VALUE arg) { VALUE current, after_end; ID succ; int n, ascii; rb_encoding *enc; CONST_ID(succ, "succ"); StringValue(end); enc = rb_enc_check(beg, end); ascii = (is_ascii_string(beg) && is_ascii_string(end)); /* single character */ if (RSTRING_LEN(beg) == 1 && RSTRING_LEN(end) == 1 && ascii) { char c = RSTRING_PTR(beg)[0]; char e = RSTRING_PTR(end)[0]; if (c > e || (excl && c == e)) return beg; for (;;) { if ((*each)(rb_enc_str_new(&c, 1, enc), arg)) break; if (!excl && c == e) break; c++; if (excl && c == e) break; } return beg; } /* both edges are all digits */ if (ascii && ISDIGIT(RSTRING_PTR(beg)[0]) && ISDIGIT(RSTRING_PTR(end)[0]) && all_digits_p(RSTRING_PTR(beg), RSTRING_LEN(beg)) && all_digits_p(RSTRING_PTR(end), RSTRING_LEN(end))) { VALUE b, e; int width; width = RSTRING_LENINT(beg); b = rb_str_to_inum(beg, 10, FALSE); e = rb_str_to_inum(end, 10, FALSE); if (FIXNUM_P(b) && FIXNUM_P(e)) { long bi = FIX2LONG(b); long ei = FIX2LONG(e); rb_encoding *usascii = rb_usascii_encoding(); while (bi <= ei) { if (excl && bi == ei) break; if ((*each)(rb_enc_sprintf(usascii, "%.*ld", width, bi), arg)) break; bi++; } } else { ID op = excl ? '<' : idLE; VALUE args[2], fmt = rb_fstring_cstr("%.*d"); args[0] = INT2FIX(width); while (rb_funcall(b, op, 1, e)) { args[1] = b; if ((*each)(rb_str_format(numberof(args), args, fmt), arg)) break; b = rb_funcallv(b, succ, 0, 0); } } return beg; } /* normal case */ n = rb_str_cmp(beg, end); if (n > 0 || (excl && n == 0)) return beg; after_end = rb_funcallv(end, succ, 0, 0); current = rb_str_dup(beg); while (!rb_str_equal(current, after_end)) { VALUE next = Qnil; if (excl || !rb_str_equal(current, end)) next = rb_funcallv(current, succ, 0, 0); if ((*each)(current, arg)) break; if (NIL_P(next)) break; current = next; StringValue(current); if (excl && rb_str_equal(current, end)) break; if (RSTRING_LEN(current) > RSTRING_LEN(end) || RSTRING_LEN(current) == 0) break; } return beg; } static int include_range_i(VALUE str, VALUE arg) { VALUE *argp = (VALUE *)arg; if (!rb_equal(str, *argp)) return 0; *argp = Qnil; return 1; } VALUE rb_str_include_range_p(VALUE beg, VALUE end, VALUE val, VALUE exclusive) { beg = rb_str_new_frozen(beg); StringValue(end); end = rb_str_new_frozen(end); if (NIL_P(val)) return Qfalse; val = rb_check_string_type(val); if (NIL_P(val)) return Qfalse; if (rb_enc_asciicompat(STR_ENC_GET(beg)) && rb_enc_asciicompat(STR_ENC_GET(end)) && rb_enc_asciicompat(STR_ENC_GET(val))) { const char *bp = RSTRING_PTR(beg); const char *ep = RSTRING_PTR(end); const char *vp = RSTRING_PTR(val); if (RSTRING_LEN(beg) == 1 && RSTRING_LEN(end) == 1) { if (RSTRING_LEN(val) == 0 || RSTRING_LEN(val) > 1) return Qfalse; else { char b = *bp; char e = *ep; char v = *vp; if (ISASCII(b) && ISASCII(e) && ISASCII(v)) { if (b <= v && v < e) return Qtrue; if (!RTEST(exclusive) && v == e) return Qtrue; return Qfalse; } } } #if 0 /* both edges are all digits */ if (ISDIGIT(*bp) && ISDIGIT(*ep) && all_digits_p(bp, RSTRING_LEN(beg)) && all_digits_p(ep, RSTRING_LEN(end))) { /* TODO */ } #endif } str_upto_each(beg, end, RTEST(exclusive), include_range_i, (VALUE)&val); return NIL_P(val) ? Qtrue : Qfalse; } static VALUE rb_str_subpat(VALUE str, VALUE re, VALUE backref) { if (rb_reg_search(re, str, 0, 0) >= 0) { VALUE match = rb_backref_get(); int nth = rb_reg_backref_number(match, backref); return rb_reg_nth_match(nth, match); } return Qnil; } static VALUE rb_str_aref(VALUE str, VALUE indx) { long idx; if (FIXNUM_P(indx)) { idx = FIX2LONG(indx); } else if (RB_TYPE_P(indx, T_REGEXP)) { return rb_str_subpat(str, indx, INT2FIX(0)); } else if (RB_TYPE_P(indx, T_STRING)) { if (rb_str_index(str, indx, 0) != -1) return rb_str_dup(indx); return Qnil; } else { /* check if indx is Range */ long beg, len = str_strlen(str, NULL); switch (rb_range_beg_len(indx, &beg, &len, len, 0)) { case Qfalse: break; case Qnil: return Qnil; default: return rb_str_substr(str, beg, len); } idx = NUM2LONG(indx); } return str_substr(str, idx, 1, FALSE); } /* * call-seq: * str[index] -> new_str or nil * str[start, length] -> new_str or nil * str[range] -> new_str or nil * str[regexp] -> new_str or nil * str[regexp, capture] -> new_str or nil * str[match_str] -> new_str or nil * str.slice(index) -> new_str or nil * str.slice(start, length) -> new_str or nil * str.slice(range) -> new_str or nil * str.slice(regexp) -> new_str or nil * str.slice(regexp, capture) -> new_str or nil * str.slice(match_str) -> new_str or nil * * Element Reference --- If passed a single +index+, returns a substring of * one character at that index. If passed a +start+ index and a +length+, * returns a substring containing +length+ characters starting at the * +start+ index. If passed a +range+, its beginning and end are interpreted as * offsets delimiting the substring to be returned. * * In these three cases, if an index is negative, it is counted from the end * of the string. For the +start+ and +range+ cases the starting index * is just before a character and an index matching the string's size. * Additionally, an empty string is returned when the starting index for a * character range is at the end of the string. * * Returns +nil+ if the initial index falls outside the string or the length * is negative. * * If a +Regexp+ is supplied, the matching portion of the string is * returned. If a +capture+ follows the regular expression, which may be a * capture group index or name, follows the regular expression that component * of the MatchData is returned instead. * * If a +match_str+ is given, that string is returned if it occurs in * the string. * * Returns +nil+ if the regular expression does not match or the match string * cannot be found. * * a = "hello there" * * a[1] #=> "e" * a[2, 3] #=> "llo" * a[2..3] #=> "ll" * * a[-3, 2] #=> "er" * a[7..-2] #=> "her" * a[-4..-2] #=> "her" * a[-2..-4] #=> "" * * a[11, 0] #=> "" * a[11] #=> nil * a[12, 0] #=> nil * a[12..-1] #=> nil * * a[/[aeiou](.)\1/] #=> "ell" * a[/[aeiou](.)\1/, 0] #=> "ell" * a[/[aeiou](.)\1/, 1] #=> "l" * a[/[aeiou](.)\1/, 2] #=> nil * * a[/(?[aeiou])(?[^aeiou])/, "non_vowel"] #=> "l" * a[/(?[aeiou])(?[^aeiou])/, "vowel"] #=> "e" * * a["lo"] #=> "lo" * a["bye"] #=> nil */ static VALUE rb_str_aref_m(int argc, VALUE *argv, VALUE str) { if (argc == 2) { if (RB_TYPE_P(argv[0], T_REGEXP)) { return rb_str_subpat(str, argv[0], argv[1]); } else { long beg = NUM2LONG(argv[0]); long len = NUM2LONG(argv[1]); return rb_str_substr(str, beg, len); } } rb_check_arity(argc, 1, 2); return rb_str_aref(str, argv[0]); } VALUE rb_str_drop_bytes(VALUE str, long len) { char *ptr = RSTRING_PTR(str); long olen = RSTRING_LEN(str), nlen; str_modifiable(str); if (len > olen) len = olen; nlen = olen - len; if (STR_EMBEDDABLE_P(nlen, TERM_LEN(str))) { char *oldptr = ptr; int fl = (int)(RBASIC(str)->flags & (STR_NOEMBED|STR_SHARED|STR_NOFREE)); STR_SET_EMBED(str); STR_SET_EMBED_LEN(str, nlen); ptr = RSTRING(str)->as.ary; memmove(ptr, oldptr + len, nlen); if (fl == STR_NOEMBED) xfree(oldptr); } else { if (!STR_SHARED_P(str)) rb_str_new_frozen(str); ptr = RSTRING(str)->as.heap.ptr += len; RSTRING(str)->as.heap.len = nlen; } ptr[nlen] = 0; ENC_CODERANGE_CLEAR(str); return str; } static void rb_str_splice_0(VALUE str, long beg, long len, VALUE val) { char *sptr; long slen, vlen = RSTRING_LEN(val); int cr; if (beg == 0 && vlen == 0) { rb_str_drop_bytes(str, len); OBJ_INFECT(str, val); return; } str_modify_keep_cr(str); RSTRING_GETMEM(str, sptr, slen); if (len < vlen) { /* expand string */ RESIZE_CAPA(str, slen + vlen - len); sptr = RSTRING_PTR(str); } if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) cr = rb_enc_str_coderange(val); else cr = ENC_CODERANGE_UNKNOWN; if (vlen != len) { memmove(sptr + beg + vlen, sptr + beg + len, slen - (beg + len)); } if (vlen < beg && len < 0) { MEMZERO(sptr + slen, char, -len); } if (vlen > 0) { memmove(sptr + beg, RSTRING_PTR(val), vlen); } slen += vlen - len; STR_SET_LEN(str, slen); TERM_FILL(&sptr[slen], TERM_LEN(str)); OBJ_INFECT(str, val); ENC_CODERANGE_SET(str, cr); } void rb_str_update(VALUE str, long beg, long len, VALUE val) { long slen; char *p, *e; rb_encoding *enc; int singlebyte = single_byte_optimizable(str); int cr; if (len < 0) rb_raise(rb_eIndexError, "negative length %ld", len); StringValue(val); enc = rb_enc_check(str, val); slen = str_strlen(str, enc); /* rb_enc_check */ if (slen < beg) { out_of_range: rb_raise(rb_eIndexError, "index %ld out of string", beg); } if (beg < 0) { if (beg + slen < 0) { goto out_of_range; } beg += slen; } assert(beg >= 0); assert(beg <= slen); if (len > slen - beg) { len = slen - beg; } str_modify_keep_cr(str); p = str_nth(RSTRING_PTR(str), RSTRING_END(str), beg, enc, singlebyte); if (!p) p = RSTRING_END(str); e = str_nth(p, RSTRING_END(str), len, enc, singlebyte); if (!e) e = RSTRING_END(str); /* error check */ beg = p - RSTRING_PTR(str); /* physical position */ len = e - p; /* physical length */ rb_str_splice_0(str, beg, len, val); rb_enc_associate(str, enc); cr = ENC_CODERANGE_AND(ENC_CODERANGE(str), ENC_CODERANGE(val)); if (cr != ENC_CODERANGE_BROKEN) ENC_CODERANGE_SET(str, cr); } #define rb_str_splice(str, beg, len, val) rb_str_update(str, beg, len, val) static void rb_str_subpat_set(VALUE str, VALUE re, VALUE backref, VALUE val) { int nth; VALUE match; long start, end, len; rb_encoding *enc; struct re_registers *regs; if (rb_reg_search(re, str, 0, 0) < 0) { rb_raise(rb_eIndexError, "regexp not matched"); } match = rb_backref_get(); nth = rb_reg_backref_number(match, backref); regs = RMATCH_REGS(match); if (nth >= regs->num_regs) { out_of_range: rb_raise(rb_eIndexError, "index %d out of regexp", nth); } if (nth < 0) { if (-nth >= regs->num_regs) { goto out_of_range; } nth += regs->num_regs; } start = BEG(nth); if (start == -1) { rb_raise(rb_eIndexError, "regexp group %d not matched", nth); } end = END(nth); len = end - start; StringValue(val); enc = rb_enc_check_str(str, val); rb_str_splice_0(str, start, len, val); rb_enc_associate(str, enc); } static VALUE rb_str_aset(VALUE str, VALUE indx, VALUE val) { long idx, beg; if (FIXNUM_P(indx)) { idx = FIX2LONG(indx); num_index: rb_str_splice(str, idx, 1, val); return val; } if (SPECIAL_CONST_P(indx)) goto generic; switch (TYPE(indx)) { case T_REGEXP: rb_str_subpat_set(str, indx, INT2FIX(0), val); return val; case T_STRING: beg = rb_str_index(str, indx, 0); if (beg < 0) { rb_raise(rb_eIndexError, "string not matched"); } beg = rb_str_sublen(str, beg); rb_str_splice(str, beg, str_strlen(indx, NULL), val); return val; generic: default: /* check if indx is Range */ { long beg, len; if (rb_range_beg_len(indx, &beg, &len, str_strlen(str, NULL), 2)) { rb_str_splice(str, beg, len, val); return val; } } idx = NUM2LONG(indx); goto num_index; } } /* * call-seq: * str[integer] = new_str * str[integer, integer] = new_str * str[range] = aString * str[regexp] = new_str * str[regexp, integer] = new_str * str[regexp, name] = new_str * str[other_str] = new_str * * Element Assignment---Replaces some or all of the content of str. The * portion of the string affected is determined using the same criteria as * String#[]. If the replacement string is not the same length as * the text it is replacing, the string will be adjusted accordingly. If the * regular expression or string is used as the index doesn't match a position * in the string, IndexError is raised. If the regular expression * form is used, the optional second Integer allows you to specify * which portion of the match to replace (effectively using the * MatchData indexing rules. The forms that take an * Integer will raise an IndexError if the value is * out of range; the Range form will raise a * RangeError, and the Regexp and String * will raise an IndexError on negative match. */ static VALUE rb_str_aset_m(int argc, VALUE *argv, VALUE str) { if (argc == 3) { if (RB_TYPE_P(argv[0], T_REGEXP)) { rb_str_subpat_set(str, argv[0], argv[1], argv[2]); } else { rb_str_splice(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]), argv[2]); } return argv[2]; } rb_check_arity(argc, 2, 3); return rb_str_aset(str, argv[0], argv[1]); } /* * call-seq: * str.insert(index, other_str) -> str * * Inserts other_str before the character at the given * index, modifying str. Negative indices count from the * end of the string, and insert after the given character. * The intent is insert aString so that it starts at the given * index. * * "abcd".insert(0, 'X') #=> "Xabcd" * "abcd".insert(3, 'X') #=> "abcXd" * "abcd".insert(4, 'X') #=> "abcdX" * "abcd".insert(-3, 'X') #=> "abXcd" * "abcd".insert(-1, 'X') #=> "abcdX" */ static VALUE rb_str_insert(VALUE str, VALUE idx, VALUE str2) { long pos = NUM2LONG(idx); if (pos == -1) { return rb_str_append(str, str2); } else if (pos < 0) { pos++; } rb_str_splice(str, pos, 0, str2); return str; } /* * call-seq: * str.slice!(integer) -> new_str or nil * str.slice!(integer, integer) -> new_str or nil * str.slice!(range) -> new_str or nil * str.slice!(regexp) -> new_str or nil * str.slice!(other_str) -> new_str or nil * * Deletes the specified portion from str, and returns the portion * deleted. * * string = "this is a string" * string.slice!(2) #=> "i" * string.slice!(3..6) #=> " is " * string.slice!(/s.*t/) #=> "sa st" * string.slice!("r") #=> "r" * string #=> "thing" */ static VALUE rb_str_slice_bang(int argc, VALUE *argv, VALUE str) { VALUE result; VALUE buf[3]; int i; rb_check_arity(argc, 1, 2); for (i=0; i= 0) { VALUE match; str = rb_str_new_frozen(str); rb_backref_set_string(str, pos, RSTRING_LEN(pat)); match = rb_backref_get(); OBJ_INFECT(match, pat); } else { rb_backref_set(Qnil); } } return pos; } else { return rb_reg_search0(pat, str, pos, 0, set_backref_str); } } /* * call-seq: * str.sub!(pattern, replacement) -> str or nil * str.sub!(pattern) {|match| block } -> str or nil * * Performs the same substitution as String#sub in-place. * * Returns +str+ if a substitution was performed or +nil+ if no substitution * was performed. */ static VALUE rb_str_sub_bang(int argc, VALUE *argv, VALUE str) { VALUE pat, repl, hash = Qnil; int iter = 0; int tainted = 0; long plen; int min_arity = rb_block_given_p() ? 1 : 2; long beg; rb_check_arity(argc, min_arity, 2); if (argc == 1) { iter = 1; } else { repl = argv[1]; hash = rb_check_hash_type(argv[1]); if (NIL_P(hash)) { StringValue(repl); } tainted = OBJ_TAINTED_RAW(repl); } pat = get_pat_quoted(argv[0], 1); str_modifiable(str); beg = rb_pat_search(pat, str, 0, 1); if (beg >= 0) { rb_encoding *enc; int cr = ENC_CODERANGE(str); long beg0, end0; VALUE match, match0 = Qnil; struct re_registers *regs; char *p, *rp; long len, rlen; match = rb_backref_get(); regs = RMATCH_REGS(match); if (RB_TYPE_P(pat, T_STRING)) { beg0 = beg; end0 = beg0 + RSTRING_LEN(pat); match0 = pat; } else { beg0 = BEG(0); end0 = END(0); if (iter) match0 = rb_reg_nth_match(0, match); } if (iter || !NIL_P(hash)) { p = RSTRING_PTR(str); len = RSTRING_LEN(str); if (iter) { repl = rb_obj_as_string(rb_yield(match0)); } else { repl = rb_hash_aref(hash, rb_str_subseq(str, beg0, end0 - beg0)); repl = rb_obj_as_string(repl); } str_mod_check(str, p, len); rb_check_frozen(str); } else { repl = rb_reg_regsub(repl, str, regs, RB_TYPE_P(pat, T_STRING) ? Qnil : pat); } enc = rb_enc_compatible(str, repl); if (!enc) { rb_encoding *str_enc = STR_ENC_GET(str); p = RSTRING_PTR(str); len = RSTRING_LEN(str); if (coderange_scan(p, beg0, str_enc) != ENC_CODERANGE_7BIT || coderange_scan(p+end0, len-end0, str_enc) != ENC_CODERANGE_7BIT) { rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s", rb_enc_name(str_enc), rb_enc_name(STR_ENC_GET(repl))); } enc = STR_ENC_GET(repl); } rb_str_modify(str); rb_enc_associate(str, enc); tainted |= OBJ_TAINTED_RAW(repl); if (ENC_CODERANGE_UNKNOWN < cr && cr < ENC_CODERANGE_BROKEN) { int cr2 = ENC_CODERANGE(repl); if (cr2 == ENC_CODERANGE_BROKEN || (cr == ENC_CODERANGE_VALID && cr2 == ENC_CODERANGE_7BIT)) cr = ENC_CODERANGE_UNKNOWN; else cr = cr2; } plen = end0 - beg0; rp = RSTRING_PTR(repl); rlen = RSTRING_LEN(repl); len = RSTRING_LEN(str); if (rlen > plen) { RESIZE_CAPA(str, len + rlen - plen); } p = RSTRING_PTR(str); if (rlen != plen) { memmove(p + beg0 + rlen, p + beg0 + plen, len - beg0 - plen); } memcpy(p + beg0, rp, rlen); len += rlen - plen; STR_SET_LEN(str, len); TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str)); ENC_CODERANGE_SET(str, cr); FL_SET_RAW(str, tainted); return str; } return Qnil; } /* * call-seq: * str.sub(pattern, replacement) -> new_str * str.sub(pattern, hash) -> new_str * str.sub(pattern) {|match| block } -> new_str * * Returns a copy of +str+ with the _first_ occurrence of +pattern+ * replaced by the second argument. The +pattern+ is typically a Regexp; if * given as a String, any regular expression metacharacters it contains will * be interpreted literally, e.g. '\\\d' will match a backslash * followed by 'd', instead of a digit. * * If +replacement+ is a String it will be substituted for the matched text. * It may contain back-references to the pattern's capture groups of the form * "\\d", where d is a group number, or * "\\k", where n is a group name. If it is a * double-quoted string, both back-references must be preceded by an * additional backslash. However, within +replacement+ the special match * variables, such as $&, will not refer to the current match. * If +replacement+ is a String that looks like a pattern's capture group but * is actually not a pattern capture group e.g. "\\'", then it * will have to be preceded by two backslashes like so "\\\\'". * * If the second argument is a Hash, and the matched text is one of its keys, * the corresponding value is the replacement string. * * In the block form, the current match string is passed in as a parameter, * and variables such as $1, $2, $`, * $&, and $' will be set appropriately. The value * returned by the block will be substituted for the match on each call. * * The result inherits any tainting in the original string or any supplied * replacement string. * * "hello".sub(/[aeiou]/, '*') #=> "h*llo" * "hello".sub(/([aeiou])/, '<\1>') #=> "hllo" * "hello".sub(/./) {|s| s.ord.to_s + ' ' } #=> "104 ello" * "hello".sub(/(?[aeiou])/, '*\k*') #=> "h*e*llo" * 'Is SHELL your preferred shell?'.sub(/[[:upper:]]{2,}/, ENV) * #=> "Is /bin/bash your preferred shell?" */ static VALUE rb_str_sub(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_sub_bang(argc, argv, str); return str; } static VALUE str_gsub(int argc, VALUE *argv, VALUE str, int bang) { VALUE pat, val = Qnil, repl, match, match0 = Qnil, dest, hash = Qnil; struct re_registers *regs; long beg, beg0, end0; long offset, blen, slen, len, last; enum {STR, ITER, MAP} mode = STR; char *sp, *cp; int tainted = 0; int need_backref = -1; rb_encoding *str_enc; switch (argc) { case 1: RETURN_ENUMERATOR(str, argc, argv); mode = ITER; break; case 2: repl = argv[1]; hash = rb_check_hash_type(argv[1]); if (NIL_P(hash)) { StringValue(repl); } else { mode = MAP; } tainted = OBJ_TAINTED_RAW(repl); break; default: rb_check_arity(argc, 1, 2); } pat = get_pat_quoted(argv[0], 1); beg = rb_pat_search(pat, str, 0, need_backref); if (beg < 0) { if (bang) return Qnil; /* no match, no substitution */ return rb_str_dup(str); } offset = 0; blen = RSTRING_LEN(str) + 30; /* len + margin */ dest = rb_str_buf_new(blen); sp = RSTRING_PTR(str); slen = RSTRING_LEN(str); cp = sp; str_enc = STR_ENC_GET(str); rb_enc_associate(dest, str_enc); ENC_CODERANGE_SET(dest, rb_enc_asciicompat(str_enc) ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID); do { match = rb_backref_get(); regs = RMATCH_REGS(match); if (RB_TYPE_P(pat, T_STRING)) { beg0 = beg; end0 = beg0 + RSTRING_LEN(pat); match0 = pat; } else { beg0 = BEG(0); end0 = END(0); if (mode == ITER) match0 = rb_reg_nth_match(0, match); } if (mode) { if (mode == ITER) { val = rb_obj_as_string(rb_yield(match0)); } else { val = rb_hash_aref(hash, rb_str_subseq(str, beg0, end0 - beg0)); val = rb_obj_as_string(val); } str_mod_check(str, sp, slen); if (val == dest) { /* paranoid check [ruby-dev:24827] */ rb_raise(rb_eRuntimeError, "block should not cheat"); } } else if (need_backref) { val = rb_reg_regsub(repl, str, regs, RB_TYPE_P(pat, T_STRING) ? Qnil : pat); if (need_backref < 0) { need_backref = val != repl; } } else { val = repl; } tainted |= OBJ_TAINTED_RAW(val); len = beg0 - offset; /* copy pre-match substr */ if (len) { rb_enc_str_buf_cat(dest, cp, len, str_enc); } rb_str_buf_append(dest, val); last = offset; offset = end0; if (beg0 == end0) { /* * Always consume at least one character of the input string * in order to prevent infinite loops. */ if (RSTRING_LEN(str) <= end0) break; len = rb_enc_fast_mbclen(RSTRING_PTR(str)+end0, RSTRING_END(str), str_enc); rb_enc_str_buf_cat(dest, RSTRING_PTR(str)+end0, len, str_enc); offset = end0 + len; } cp = RSTRING_PTR(str) + offset; if (offset > RSTRING_LEN(str)) break; beg = rb_pat_search(pat, str, offset, need_backref); } while (beg >= 0); if (RSTRING_LEN(str) > offset) { rb_enc_str_buf_cat(dest, cp, RSTRING_LEN(str) - offset, str_enc); } rb_pat_search(pat, str, last, 1); if (bang) { str_shared_replace(str, dest); } else { RBASIC_SET_CLASS(dest, rb_obj_class(str)); tainted |= OBJ_TAINTED_RAW(str); str = dest; } FL_SET_RAW(str, tainted); return str; } /* * call-seq: * str.gsub!(pattern, replacement) -> str or nil * str.gsub!(pattern, hash) -> str or nil * str.gsub!(pattern) {|match| block } -> str or nil * str.gsub!(pattern) -> an_enumerator * * Performs the substitutions of String#gsub in place, returning * str, or nil if no substitutions were performed. * If no block and no replacement is given, an enumerator is returned instead. */ static VALUE rb_str_gsub_bang(int argc, VALUE *argv, VALUE str) { str_modify_keep_cr(str); return str_gsub(argc, argv, str, 1); } /* * call-seq: * str.gsub(pattern, replacement) -> new_str * str.gsub(pattern, hash) -> new_str * str.gsub(pattern) {|match| block } -> new_str * str.gsub(pattern) -> enumerator * * Returns a copy of str with all occurrences of * pattern substituted for the second argument. The pattern is * typically a Regexp; if given as a String, any * regular expression metacharacters it contains will be interpreted * literally, e.g. '\\\d' will match a backslash followed by 'd', * instead of a digit. * * If replacement is a String it will be substituted for * the matched text. It may contain back-references to the pattern's capture * groups of the form \\\d, where d is a group number, or * \\\k, where n is a group name. If it is a * double-quoted string, both back-references must be preceded by an * additional backslash. However, within replacement the special match * variables, such as $&, will not refer to the current match. * * If the second argument is a Hash, and the matched text is one * of its keys, the corresponding value is the replacement string. * * In the block form, the current match string is passed in as a parameter, * and variables such as $1, $2, $`, * $&, and $' will be set appropriately. The value * returned by the block will be substituted for the match on each call. * * The result inherits any tainting in the original string or any supplied * replacement string. * * When neither a block nor a second argument is supplied, an * Enumerator is returned. * * "hello".gsub(/[aeiou]/, '*') #=> "h*ll*" * "hello".gsub(/([aeiou])/, '<\1>') #=> "hll" * "hello".gsub(/./) {|s| s.ord.to_s + ' '} #=> "104 101 108 108 111 " * "hello".gsub(/(?[aeiou])/, '{\k}') #=> "h{e}ll{o}" * 'hello'.gsub(/[eo]/, 'e' => 3, 'o' => '*') #=> "h3ll*" */ static VALUE rb_str_gsub(int argc, VALUE *argv, VALUE str) { return str_gsub(argc, argv, str, 0); } /* * call-seq: * str.replace(other_str) -> str * * Replaces the contents and taintedness of str with the corresponding * values in other_str. * * s = "hello" #=> "hello" * s.replace "world" #=> "world" */ VALUE rb_str_replace(VALUE str, VALUE str2) { str_modifiable(str); if (str == str2) return str; StringValue(str2); str_discard(str); return str_replace(str, str2); } /* * call-seq: * string.clear -> string * * Makes string empty. * * a = "abcde" * a.clear #=> "" */ static VALUE rb_str_clear(VALUE str) { str_discard(str); STR_SET_EMBED(str); STR_SET_EMBED_LEN(str, 0); RSTRING_PTR(str)[0] = 0; if (rb_enc_asciicompat(STR_ENC_GET(str))) ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT); else ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID); return str; } /* * call-seq: * string.chr -> string * * Returns a one-character string at the beginning of the string. * * a = "abcde" * a.chr #=> "a" */ static VALUE rb_str_chr(VALUE str) { return rb_str_substr(str, 0, 1); } /* * call-seq: * str.getbyte(index) -> 0 .. 255 * * returns the indexth byte as an integer. */ static VALUE rb_str_getbyte(VALUE str, VALUE index) { long pos = NUM2LONG(index); if (pos < 0) pos += RSTRING_LEN(str); if (pos < 0 || RSTRING_LEN(str) <= pos) return Qnil; return INT2FIX((unsigned char)RSTRING_PTR(str)[pos]); } /* * call-seq: * str.setbyte(index, integer) -> integer * * modifies the indexth byte as integer. */ static VALUE rb_str_setbyte(VALUE str, VALUE index, VALUE value) { long pos = NUM2LONG(index); int byte = NUM2INT(value); long len = RSTRING_LEN(str); char *head, *ptr, *left = 0; rb_encoding *enc; int cr = ENC_CODERANGE_UNKNOWN, width, nlen; if (pos < -len || len <= pos) rb_raise(rb_eIndexError, "index %ld out of string", pos); if (pos < 0) pos += len; if (!str_independent(str)) str_make_independent(str); enc = STR_ENC_GET(str); head = RSTRING_PTR(str); ptr = &head[pos]; if (!STR_EMBED_P(str)) { cr = ENC_CODERANGE(str); switch (cr) { case ENC_CODERANGE_7BIT: left = ptr; *ptr = byte; if (ISASCII(byte)) goto end; nlen = rb_enc_precise_mbclen(left, head+len, enc); if (!MBCLEN_CHARFOUND_P(nlen)) ENC_CODERANGE_SET(str, ENC_CODERANGE_BROKEN); else ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID); goto end; case ENC_CODERANGE_VALID: left = rb_enc_left_char_head(head, ptr, head+len, enc); width = rb_enc_precise_mbclen(left, head+len, enc); *ptr = byte; nlen = rb_enc_precise_mbclen(left, head+len, enc); if (!MBCLEN_CHARFOUND_P(nlen)) ENC_CODERANGE_SET(str, ENC_CODERANGE_BROKEN); else if (MBCLEN_CHARFOUND_LEN(nlen) != width || ISASCII(byte)) ENC_CODERANGE_CLEAR(str); goto end; } } ENC_CODERANGE_CLEAR(str); *ptr = byte; end: return value; } static VALUE str_byte_substr(VALUE str, long beg, long len, int empty) { char *p, *s = RSTRING_PTR(str); long n = RSTRING_LEN(str); VALUE str2; if (beg > n || len < 0) return Qnil; if (beg < 0) { beg += n; if (beg < 0) return Qnil; } if (len > n - beg) len = n - beg; if (len <= 0) { if (!empty) return Qnil; len = 0; p = 0; } else p = s + beg; if (!STR_EMBEDDABLE_P(len, TERM_LEN(str)) && SHARABLE_SUBSTRING_P(beg, len, n)) { str2 = rb_str_new_frozen(str); str2 = str_new_shared(rb_obj_class(str2), str2); RSTRING(str2)->as.heap.ptr += beg; RSTRING(str2)->as.heap.len = len; } else { str2 = rb_str_new_with_class(str, p, len); } str_enc_copy(str2, str); if (RSTRING_LEN(str2) == 0) { if (!rb_enc_asciicompat(STR_ENC_GET(str))) ENC_CODERANGE_SET(str2, ENC_CODERANGE_VALID); else ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT); } else { switch (ENC_CODERANGE(str)) { case ENC_CODERANGE_7BIT: ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT); break; default: ENC_CODERANGE_SET(str2, ENC_CODERANGE_UNKNOWN); break; } } OBJ_INFECT_RAW(str2, str); return str2; } static VALUE str_byte_aref(VALUE str, VALUE indx) { long idx; if (FIXNUM_P(indx)) { idx = FIX2LONG(indx); } else { /* check if indx is Range */ long beg, len = RSTRING_LEN(str); switch (rb_range_beg_len(indx, &beg, &len, len, 0)) { case Qfalse: break; case Qnil: return Qnil; default: return str_byte_substr(str, beg, len, TRUE); } idx = NUM2LONG(indx); } return str_byte_substr(str, idx, 1, FALSE); } /* * call-seq: * str.byteslice(integer) -> new_str or nil * str.byteslice(integer, integer) -> new_str or nil * str.byteslice(range) -> new_str or nil * * Byte Reference---If passed a single Integer, returns a * substring of one byte at that position. If passed two Integer * objects, returns a substring starting at the offset given by the first, and * a length given by the second. If given a Range, a substring containing * bytes at offsets given by the range is returned. In all three cases, if * an offset is negative, it is counted from the end of str. Returns * nil if the initial offset falls outside the string, the length * is negative, or the beginning of the range is greater than the end. * The encoding of the resulted string keeps original encoding. * * "hello".byteslice(1) #=> "e" * "hello".byteslice(-1) #=> "o" * "hello".byteslice(1, 2) #=> "el" * "\x80\u3042".byteslice(1, 3) #=> "\u3042" * "\x03\u3042\xff".byteslice(1..3) #=> "\u3042" */ static VALUE rb_str_byteslice(int argc, VALUE *argv, VALUE str) { if (argc == 2) { long beg = NUM2LONG(argv[0]); long end = NUM2LONG(argv[1]); return str_byte_substr(str, beg, end, TRUE); } rb_check_arity(argc, 1, 2); return str_byte_aref(str, argv[0]); } /* * call-seq: * str.reverse -> new_str * * Returns a new string with the characters from str in reverse order. * * "stressed".reverse #=> "desserts" */ static VALUE rb_str_reverse(VALUE str) { rb_encoding *enc; VALUE rev; char *s, *e, *p; int cr; if (RSTRING_LEN(str) <= 1) return rb_str_dup(str); enc = STR_ENC_GET(str); rev = rb_str_new_with_class(str, 0, RSTRING_LEN(str)); s = RSTRING_PTR(str); e = RSTRING_END(str); p = RSTRING_END(rev); cr = ENC_CODERANGE(str); if (RSTRING_LEN(str) > 1) { if (single_byte_optimizable(str)) { while (s < e) { *--p = *s++; } } else if (cr == ENC_CODERANGE_VALID) { while (s < e) { int clen = rb_enc_fast_mbclen(s, e, enc); p -= clen; memcpy(p, s, clen); s += clen; } } else { cr = rb_enc_asciicompat(enc) ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID; while (s < e) { int clen = rb_enc_mbclen(s, e, enc); if (clen > 1 || (*s & 0x80)) cr = ENC_CODERANGE_UNKNOWN; p -= clen; memcpy(p, s, clen); s += clen; } } } STR_SET_LEN(rev, RSTRING_LEN(str)); OBJ_INFECT_RAW(rev, str); str_enc_copy(rev, str); ENC_CODERANGE_SET(rev, cr); return rev; } /* * call-seq: * str.reverse! -> str * * Reverses str in place. */ static VALUE rb_str_reverse_bang(VALUE str) { if (RSTRING_LEN(str) > 1) { if (single_byte_optimizable(str)) { char *s, *e, c; str_modify_keep_cr(str); s = RSTRING_PTR(str); e = RSTRING_END(str) - 1; while (s < e) { c = *s; *s++ = *e; *e-- = c; } } else { str_shared_replace(str, rb_str_reverse(str)); } } else { str_modify_keep_cr(str); } return str; } /* * call-seq: * str.include? other_str -> true or false * * Returns true if str contains the given string or * character. * * "hello".include? "lo" #=> true * "hello".include? "ol" #=> false * "hello".include? ?h #=> true */ static VALUE rb_str_include(VALUE str, VALUE arg) { long i; StringValue(arg); i = rb_str_index(str, arg, 0); if (i == -1) return Qfalse; return Qtrue; } /* * call-seq: * str.to_i(base=10) -> integer * * Returns the result of interpreting leading characters in str as an * integer base base (between 2 and 36). Extraneous characters past the * end of a valid number are ignored. If there is not a valid number at the * start of str, 0 is returned. This method never raises an * exception when base is valid. * * "12345".to_i #=> 12345 * "99 red balloons".to_i #=> 99 * "0a".to_i #=> 0 * "0a".to_i(16) #=> 10 * "hello".to_i #=> 0 * "1100101".to_i(2) #=> 101 * "1100101".to_i(8) #=> 294977 * "1100101".to_i(10) #=> 1100101 * "1100101".to_i(16) #=> 17826049 */ static VALUE rb_str_to_i(int argc, VALUE *argv, VALUE str) { int base; if (argc == 0) base = 10; else { VALUE b; rb_scan_args(argc, argv, "01", &b); base = NUM2INT(b); } if (base < 0) { rb_raise(rb_eArgError, "invalid radix %d", base); } return rb_str_to_inum(str, base, FALSE); } /* * call-seq: * str.to_f -> float * * Returns the result of interpreting leading characters in str as a * floating point number. Extraneous characters past the end of a valid number * are ignored. If there is not a valid number at the start of str, * 0.0 is returned. This method never raises an exception. * * "123.45e1".to_f #=> 1234.5 * "45.67 degrees".to_f #=> 45.67 * "thx1138".to_f #=> 0.0 */ static VALUE rb_str_to_f(VALUE str) { return DBL2NUM(rb_str_to_dbl(str, FALSE)); } /* * call-seq: * str.to_s -> str * str.to_str -> str * * Returns +self+. * * If called on a subclass of String, converts the receiver to a String object. */ static VALUE rb_str_to_s(VALUE str) { if (rb_obj_class(str) != rb_cString) { return str_duplicate(rb_cString, str); } return str; } #if 0 static void str_cat_char(VALUE str, unsigned int c, rb_encoding *enc) { char s[RUBY_MAX_CHAR_LEN]; int n = rb_enc_codelen(c, enc); rb_enc_mbcput(c, s, enc); rb_enc_str_buf_cat(str, s, n, enc); } #endif #define CHAR_ESC_LEN 13 /* sizeof(\x{ hex of 32bit unsigned int } \0) */ int rb_str_buf_cat_escaped_char(VALUE result, unsigned int c, int unicode_p) { char buf[CHAR_ESC_LEN + 1]; int l; #if SIZEOF_INT > 4 c &= 0xffffffff; #endif if (unicode_p) { if (c < 0x7F && ISPRINT(c)) { snprintf(buf, CHAR_ESC_LEN, "%c", c); } else if (c < 0x10000) { snprintf(buf, CHAR_ESC_LEN, "\\u%04X", c); } else { snprintf(buf, CHAR_ESC_LEN, "\\u{%X}", c); } } else { if (c < 0x100) { snprintf(buf, CHAR_ESC_LEN, "\\x%02X", c); } else { snprintf(buf, CHAR_ESC_LEN, "\\x{%X}", c); } } l = (int)strlen(buf); /* CHAR_ESC_LEN cannot exceed INT_MAX */ rb_str_buf_cat(result, buf, l); return l; } VALUE rb_str_escape(VALUE str) { int encidx = ENCODING_GET(str); rb_encoding *enc = rb_enc_from_index(encidx); const char *p = RSTRING_PTR(str); const char *pend = RSTRING_END(str); const char *prev = p; char buf[CHAR_ESC_LEN + 1]; VALUE result = rb_str_buf_new(0); int unicode_p = rb_enc_unicode_p(enc); int asciicompat = rb_enc_asciicompat(enc); while (p < pend) { unsigned int c, cc; int n = rb_enc_precise_mbclen(p, pend, enc); if (!MBCLEN_CHARFOUND_P(n)) { if (p > prev) str_buf_cat(result, prev, p - prev); n = rb_enc_mbminlen(enc); if (pend < p + n) n = (int)(pend - p); while (n--) { snprintf(buf, CHAR_ESC_LEN, "\\x%02X", *p & 0377); str_buf_cat(result, buf, strlen(buf)); prev = ++p; } continue; } n = MBCLEN_CHARFOUND_LEN(n); c = rb_enc_mbc_to_codepoint(p, pend, enc); p += n; switch (c) { case '\n': cc = 'n'; break; case '\r': cc = 'r'; break; case '\t': cc = 't'; break; case '\f': cc = 'f'; break; case '\013': cc = 'v'; break; case '\010': cc = 'b'; break; case '\007': cc = 'a'; break; case 033: cc = 'e'; break; default: cc = 0; break; } if (cc) { if (p - n > prev) str_buf_cat(result, prev, p - n - prev); buf[0] = '\\'; buf[1] = (char)cc; str_buf_cat(result, buf, 2); prev = p; } else if (asciicompat && rb_enc_isascii(c, enc) && ISPRINT(c)) { } else { if (p - n > prev) str_buf_cat(result, prev, p - n - prev); rb_str_buf_cat_escaped_char(result, c, unicode_p); prev = p; } } if (p > prev) str_buf_cat(result, prev, p - prev); ENCODING_CODERANGE_SET(result, rb_usascii_encindex(), ENC_CODERANGE_7BIT); OBJ_INFECT_RAW(result, str); return result; } /* * call-seq: * str.inspect -> string * * Returns a printable version of _str_, surrounded by quote marks, * with special characters escaped. * * str = "hello" * str[3] = "\b" * str.inspect #=> "\"hel\\bo\"" */ VALUE rb_str_inspect(VALUE str) { int encidx = ENCODING_GET(str); rb_encoding *enc = rb_enc_from_index(encidx), *actenc; const char *p, *pend, *prev; char buf[CHAR_ESC_LEN + 1]; VALUE result = rb_str_buf_new(0); rb_encoding *resenc = rb_default_internal_encoding(); int unicode_p = rb_enc_unicode_p(enc); int asciicompat = rb_enc_asciicompat(enc); if (resenc == NULL) resenc = rb_default_external_encoding(); if (!rb_enc_asciicompat(resenc)) resenc = rb_usascii_encoding(); rb_enc_associate(result, resenc); str_buf_cat2(result, "\""); p = RSTRING_PTR(str); pend = RSTRING_END(str); prev = p; actenc = get_actual_encoding(encidx, str); if (actenc != enc) { enc = actenc; if (unicode_p) unicode_p = rb_enc_unicode_p(enc); } while (p < pend) { unsigned int c, cc; int n; n = rb_enc_precise_mbclen(p, pend, enc); if (!MBCLEN_CHARFOUND_P(n)) { if (p > prev) str_buf_cat(result, prev, p - prev); n = rb_enc_mbminlen(enc); if (pend < p + n) n = (int)(pend - p); while (n--) { snprintf(buf, CHAR_ESC_LEN, "\\x%02X", *p & 0377); str_buf_cat(result, buf, strlen(buf)); prev = ++p; } continue; } n = MBCLEN_CHARFOUND_LEN(n); c = rb_enc_mbc_to_codepoint(p, pend, enc); p += n; if ((asciicompat || unicode_p) && (c == '"'|| c == '\\' || (c == '#' && p < pend && MBCLEN_CHARFOUND_P(rb_enc_precise_mbclen(p,pend,enc)) && (cc = rb_enc_codepoint(p,pend,enc), (cc == '$' || cc == '@' || cc == '{'))))) { if (p - n > prev) str_buf_cat(result, prev, p - n - prev); str_buf_cat2(result, "\\"); if (asciicompat || enc == resenc) { prev = p - n; continue; } } switch (c) { case '\n': cc = 'n'; break; case '\r': cc = 'r'; break; case '\t': cc = 't'; break; case '\f': cc = 'f'; break; case '\013': cc = 'v'; break; case '\010': cc = 'b'; break; case '\007': cc = 'a'; break; case 033: cc = 'e'; break; default: cc = 0; break; } if (cc) { if (p - n > prev) str_buf_cat(result, prev, p - n - prev); buf[0] = '\\'; buf[1] = (char)cc; str_buf_cat(result, buf, 2); prev = p; continue; } if ((enc == resenc && rb_enc_isprint(c, enc)) || (asciicompat && rb_enc_isascii(c, enc) && ISPRINT(c))) { continue; } else { if (p - n > prev) str_buf_cat(result, prev, p - n - prev); rb_str_buf_cat_escaped_char(result, c, unicode_p); prev = p; continue; } } if (p > prev) str_buf_cat(result, prev, p - prev); str_buf_cat2(result, "\""); OBJ_INFECT_RAW(result, str); return result; } #define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{')) /* * call-seq: * str.dump -> new_str * * Produces a version of +str+ with all non-printing characters replaced by * \nnn notation and all special characters escaped. * * "hello \n ''".dump #=> "\"hello \\n ''\"" */ VALUE rb_str_dump(VALUE str) { int encidx = rb_enc_get_index(str); rb_encoding *enc = rb_enc_from_index(encidx); long len; const char *p, *pend; char *q, *qend; VALUE result; int u8 = (encidx == rb_utf8_encindex()); static const char nonascii_suffix[] = ".force_encoding(\"%s\")"; len = 2; /* "" */ if (!rb_enc_asciicompat(enc)) { len += strlen(nonascii_suffix) - rb_strlen_lit("%s"); len += strlen(enc->name); } p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str); while (p < pend) { int clen; unsigned char c = *p++; switch (c) { case '"': case '\\': case '\n': case '\r': case '\t': case '\f': case '\013': case '\010': case '\007': case '\033': clen = 2; break; case '#': clen = IS_EVSTR(p, pend) ? 2 : 1; break; default: if (ISPRINT(c)) { clen = 1; } else { if (u8 && c > 0x7F) { /* \u notation */ int n = rb_enc_precise_mbclen(p-1, pend, enc); if (MBCLEN_CHARFOUND_P(n)) { unsigned int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc); if (cc <= 0xFFFF) clen = 6; /* \uXXXX */ else if (cc <= 0xFFFFF) clen = 9; /* \u{XXXXX} */ else clen = 10; /* \u{XXXXXX} */ p += MBCLEN_CHARFOUND_LEN(n)-1; break; } } clen = 4; /* \xNN */ } break; } if (clen > LONG_MAX - len) { rb_raise(rb_eRuntimeError, "string size too big"); } len += clen; } result = rb_str_new_with_class(str, 0, len); p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str); q = RSTRING_PTR(result); qend = q + len + 1; *q++ = '"'; while (p < pend) { unsigned char c = *p++; if (c == '"' || c == '\\') { *q++ = '\\'; *q++ = c; } else if (c == '#') { if (IS_EVSTR(p, pend)) *q++ = '\\'; *q++ = '#'; } else if (c == '\n') { *q++ = '\\'; *q++ = 'n'; } else if (c == '\r') { *q++ = '\\'; *q++ = 'r'; } else if (c == '\t') { *q++ = '\\'; *q++ = 't'; } else if (c == '\f') { *q++ = '\\'; *q++ = 'f'; } else if (c == '\013') { *q++ = '\\'; *q++ = 'v'; } else if (c == '\010') { *q++ = '\\'; *q++ = 'b'; } else if (c == '\007') { *q++ = '\\'; *q++ = 'a'; } else if (c == '\033') { *q++ = '\\'; *q++ = 'e'; } else if (ISPRINT(c)) { *q++ = c; } else { *q++ = '\\'; if (u8) { int n = rb_enc_precise_mbclen(p-1, pend, enc) - 1; if (MBCLEN_CHARFOUND_P(n)) { int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc); p += n; if (cc <= 0xFFFF) snprintf(q, qend-q, "u%04X", cc); /* \uXXXX */ else snprintf(q, qend-q, "u{%X}", cc); /* \u{XXXXX} or \u{XXXXXX} */ q += strlen(q); continue; } } snprintf(q, qend-q, "x%02X", c); q += 3; } } *q++ = '"'; *q = '\0'; if (!rb_enc_asciicompat(enc)) { snprintf(q, qend-q, nonascii_suffix, enc->name); encidx = rb_ascii8bit_encindex(); } OBJ_INFECT_RAW(result, str); /* result from dump is ASCII */ rb_enc_associate_index(result, encidx); ENC_CODERANGE_SET(result, ENC_CODERANGE_7BIT); return result; } static int unescape_ascii(unsigned int c) { switch (c) { case 'n': return '\n'; case 'r': return '\r'; case 't': return '\t'; case 'f': return '\f'; case 'v': return '\13'; case 'b': return '\010'; case 'a': return '\007'; case 'e': return 033; default: UNREACHABLE; } } static void undump_after_backslash(VALUE undumped, const char **ss, const char *s_end, rb_encoding **penc, bool *utf8, bool *binary) { const char *s = *ss; unsigned int c; int codelen; size_t hexlen; char buf[6]; static rb_encoding *enc_utf8 = NULL; switch (*s) { case '\\': case '"': case '#': rb_str_cat(undumped, s, 1); /* cat itself */ s++; break; case 'n': case 'r': case 't': case 'f': case 'v': case 'b': case 'a': case 'e': *buf = (char)unescape_ascii(*s); rb_str_cat(undumped, buf, 1); s++; break; case 'u': if (*binary) { rb_raise(rb_eRuntimeError, "hex escape and Unicode escape are mixed"); } *utf8 = true; if (++s >= s_end) { rb_raise(rb_eRuntimeError, "invalid Unicode escape"); } if (enc_utf8 == NULL) enc_utf8 = rb_utf8_encoding(); if (*penc != enc_utf8) { *penc = enc_utf8; rb_enc_associate(undumped, enc_utf8); } if (*s == '{') { /* handle \u{...} form */ s++; for (;;) { if (s >= s_end) { rb_raise(rb_eRuntimeError, "unterminated Unicode escape"); } if (*s == '}') { s++; break; } if (ISSPACE(*s)) { s++; continue; } c = scan_hex(s, s_end-s, &hexlen); if (hexlen == 0 || hexlen > 6) { rb_raise(rb_eRuntimeError, "invalid Unicode escape"); } if (c > 0x10ffff) { rb_raise(rb_eRuntimeError, "invalid Unicode codepoint (too large)"); } if (0xd800 <= c && c <= 0xdfff) { rb_raise(rb_eRuntimeError, "invalid Unicode codepoint"); } codelen = rb_enc_mbcput(c, buf, *penc); rb_str_cat(undumped, buf, codelen); s += hexlen; } } else { /* handle \uXXXX form */ c = scan_hex(s, 4, &hexlen); if (hexlen != 4) { rb_raise(rb_eRuntimeError, "invalid Unicode escape"); } if (0xd800 <= c && c <= 0xdfff) { rb_raise(rb_eRuntimeError, "invalid Unicode codepoint"); } codelen = rb_enc_mbcput(c, buf, *penc); rb_str_cat(undumped, buf, codelen); s += hexlen; } break; case 'x': if (*utf8) { rb_raise(rb_eRuntimeError, "hex escape and Unicode escape are mixed"); } *binary = true; if (++s >= s_end) { rb_raise(rb_eRuntimeError, "invalid hex escape"); } *buf = scan_hex(s, 2, &hexlen); if (hexlen != 2) { rb_raise(rb_eRuntimeError, "invalid hex escape"); } rb_str_cat(undumped, buf, 1); s += hexlen; break; default: rb_str_cat(undumped, s-1, 2); s++; } *ss = s; } static VALUE rb_str_is_ascii_only_p(VALUE str); /* * call-seq: * str.undump -> new_str * * Produces unescaped version of +str+. * See also String#dump because String#undump does inverse of String#dump. * * "\"hello \\n ''\"".undump #=> "hello \n ''" */ static VALUE str_undump(VALUE str) { const char *s = RSTRING_PTR(str); const char *s_end = RSTRING_END(str); rb_encoding *enc = rb_enc_get(str); VALUE undumped = rb_enc_str_new(s, 0L, enc); bool utf8 = false; bool binary = false; int w; rb_must_asciicompat(str); if (rb_str_is_ascii_only_p(str) == Qfalse) { rb_raise(rb_eRuntimeError, "non-ASCII character detected"); } if (!str_null_check(str, &w)) { rb_raise(rb_eRuntimeError, "string contains null byte"); } if (RSTRING_LEN(str) < 2) goto invalid_format; if (*s != '"') goto invalid_format; /* strip '"' at the start */ s++; for (;;) { if (s >= s_end) { rb_raise(rb_eRuntimeError, "unterminated dumped string"); } if (*s == '"') { /* epilogue */ s++; if (s == s_end) { /* ascii compatible dumped string */ break; } else { const char *encname; int encidx; ptrdiff_t size; if (utf8) { rb_raise(rb_eRuntimeError, "dumped string contained Unicode escape but used force_encoding"); } size = rb_strlen_lit(".force_encoding(\""); if (s_end - s <= size) goto invalid_format; if (memcmp(s, ".force_encoding(\"", size) != 0) goto invalid_format; s += size; encname = s; s = memchr(s, '"', s_end-s); size = s - encname; if (!s) goto invalid_format; if (s_end - s != 2) goto invalid_format; if (s[0] != '"' || s[1] != ')') goto invalid_format; encidx = rb_enc_find_index2(encname, (long)size); if (encidx < 0) { rb_raise(rb_eRuntimeError, "dumped string has unknown encoding name"); } rb_enc_associate_index(undumped, encidx); } break; } if (*s == '\\') { s++; if (s >= s_end) { rb_raise(rb_eRuntimeError, "invalid escape"); } undump_after_backslash(undumped, &s, s_end, &enc, &utf8, &binary); } else { rb_str_cat(undumped, s++, 1); } } OBJ_INFECT(undumped, str); return undumped; invalid_format: rb_raise(rb_eRuntimeError, "invalid dumped string; not wrapped with '\"' nor '\"...\".force_encoding(\"...\")' form"); } static void rb_str_check_dummy_enc(rb_encoding *enc) { if (rb_enc_dummy_p(enc)) { rb_raise(rb_eEncCompatError, "incompatible encoding with this operation: %s", rb_enc_name(enc)); } } static OnigCaseFoldType check_case_options(int argc, VALUE *argv, OnigCaseFoldType flags) { if (argc==0) return flags; if (argc>2) rb_raise(rb_eArgError, "too many options"); if (argv[0]==sym_turkic) { flags |= ONIGENC_CASE_FOLD_TURKISH_AZERI; if (argc==2) { if (argv[1]==sym_lithuanian) flags |= ONIGENC_CASE_FOLD_LITHUANIAN; else rb_raise(rb_eArgError, "invalid second option"); } } else if (argv[0]==sym_lithuanian) { flags |= ONIGENC_CASE_FOLD_LITHUANIAN; if (argc==2) { if (argv[1]==sym_turkic) flags |= ONIGENC_CASE_FOLD_TURKISH_AZERI; else rb_raise(rb_eArgError, "invalid second option"); } } else if (argc>1) rb_raise(rb_eArgError, "too many options"); else if (argv[0]==sym_ascii) flags |= ONIGENC_CASE_ASCII_ONLY; else if (argv[0]==sym_fold) { if ((flags & (ONIGENC_CASE_UPCASE|ONIGENC_CASE_DOWNCASE)) == ONIGENC_CASE_DOWNCASE) flags ^= ONIGENC_CASE_FOLD|ONIGENC_CASE_DOWNCASE; else rb_raise(rb_eArgError, "option :fold only allowed for downcasing"); } else rb_raise(rb_eArgError, "invalid option"); return flags; } /* 16 should be long enough to absorb any kind of single character length increase */ #define CASE_MAPPING_ADDITIONAL_LENGTH 20 #ifndef CASEMAP_DEBUG # define CASEMAP_DEBUG 0 #endif struct mapping_buffer; typedef struct mapping_buffer { size_t capa; size_t used; struct mapping_buffer *next; OnigUChar space[FLEX_ARY_LEN]; } mapping_buffer; static VALUE rb_str_casemap(VALUE source, OnigCaseFoldType *flags, rb_encoding *enc) { VALUE target; OnigUChar *source_current, *source_end; int target_length = 0; mapping_buffer pre_buffer, /* only next pointer used */ *current_buffer = &pre_buffer; size_t buffer_count = 0; int buffer_length_or_invalid; if (RSTRING_LEN(source) == 0) return rb_str_dup(source); source_current = (OnigUChar*)RSTRING_PTR(source); source_end = (OnigUChar*)RSTRING_END(source); while (source_current < source_end) { /* increase multiplier using buffer count to converge quickly */ size_t capa = (size_t)(source_end-source_current)*++buffer_count + CASE_MAPPING_ADDITIONAL_LENGTH; if (CASEMAP_DEBUG) { fprintf(stderr, "Buffer allocation, capa is %"PRIuSIZE"\n", capa); /* for tuning */ } current_buffer->next = xmalloc(sizeof(mapping_buffer) + capa); current_buffer = current_buffer->next; current_buffer->next = NULL; current_buffer->capa = capa; buffer_length_or_invalid = enc->case_map(flags, (const OnigUChar**)&source_current, source_end, current_buffer->space, current_buffer->space+current_buffer->capa, enc); if (buffer_length_or_invalid < 0) { mapping_buffer *previous_buffer; current_buffer = pre_buffer.next; while (current_buffer) { previous_buffer = current_buffer; current_buffer = current_buffer->next; xfree(previous_buffer); } rb_raise(rb_eArgError, "input string invalid"); } target_length += current_buffer->used = buffer_length_or_invalid; } if (CASEMAP_DEBUG) { fprintf(stderr, "Buffer count is %"PRIuSIZE"\n", buffer_count); /* for tuning */ } if (buffer_count==1) { target = rb_str_new_with_class(source, (const char*)current_buffer->space, target_length); xfree(current_buffer); } else { char *target_current; mapping_buffer *previous_buffer; target = rb_str_new_with_class(source, 0, target_length); target_current = RSTRING_PTR(target); current_buffer=pre_buffer.next; while (current_buffer) { memcpy(target_current, current_buffer->space, current_buffer->used); target_current += current_buffer->used; previous_buffer = current_buffer; current_buffer = current_buffer->next; xfree(previous_buffer); } } /* TODO: check about string terminator character */ OBJ_INFECT_RAW(target, source); str_enc_copy(target, source); /*ENC_CODERANGE_SET(mapped, cr);*/ return target; } static void rb_str_ascii_casemap(VALUE source, OnigCaseFoldType *flags, rb_encoding *enc) { OnigUChar *source_current, *source_end; long old_length = RSTRING_LEN(source); int length_or_invalid; if (old_length == 0) return; source_current = (OnigUChar*)RSTRING_PTR(source); source_end = (OnigUChar*)RSTRING_END(source); length_or_invalid = onigenc_ascii_only_case_map(flags, (const OnigUChar**)&source_current, source_end, source_current, source_end, enc); if (length_or_invalid < 0) rb_raise(rb_eArgError, "input string invalid"); if (CASEMAP_DEBUG && length_or_invalid != old_length) { fprintf(stderr, "problem with rb_str_ascii_casemap" "; old_length=%ld, new_length=%d\n", old_length, length_or_invalid); rb_raise(rb_eArgError, "internal problem with rb_str_ascii_casemap" "; old_length=%ld, new_length=%d\n", old_length, length_or_invalid); } } /* * call-seq: * str.upcase! -> str or nil * str.upcase!([options]) -> str or nil * * Upcases the contents of str, returning nil if no changes * were made. * * See String#downcase for meaning of +options+ and use with different encodings. */ static VALUE rb_str_upcase_bang(int argc, VALUE *argv, VALUE str) { rb_encoding *enc; OnigCaseFoldType flags = ONIGENC_CASE_UPCASE; flags = check_case_options(argc, argv, flags); str_modify_keep_cr(str); enc = STR_ENC_GET(str); rb_str_check_dummy_enc(enc); if (((flags&ONIGENC_CASE_ASCII_ONLY) && (enc==rb_utf8_encoding() || rb_enc_mbmaxlen(enc)==1)) || (!(flags&ONIGENC_CASE_FOLD_TURKISH_AZERI) && ENC_CODERANGE(str)==ENC_CODERANGE_7BIT)) { char *s = RSTRING_PTR(str), *send = RSTRING_END(str); while (s < send) { unsigned int c = *(unsigned char*)s; if (rb_enc_isascii(c, enc) && 'a' <= c && c <= 'z') { *s = 'A' + (c - 'a'); flags |= ONIGENC_CASE_MODIFIED; } s++; } } else if (flags&ONIGENC_CASE_ASCII_ONLY) rb_str_ascii_casemap(str, &flags, enc); else str_shared_replace(str, rb_str_casemap(str, &flags, enc)); if (ONIGENC_CASE_MODIFIED&flags) return str; return Qnil; } /* * call-seq: * str.upcase -> new_str * str.upcase([options]) -> new_str * * Returns a copy of str with all lowercase letters replaced with their * uppercase counterparts. * * See String#downcase for meaning of +options+ and use with different encodings. * * "hEllO".upcase #=> "HELLO" */ static VALUE rb_str_upcase(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_upcase_bang(argc, argv, str); return str; } /* * call-seq: * str.downcase! -> str or nil * str.downcase!([options]) -> str or nil * * Downcases the contents of str, returning nil if no * changes were made. * * See String#downcase for meaning of +options+ and use with different encodings. */ static VALUE rb_str_downcase_bang(int argc, VALUE *argv, VALUE str) { rb_encoding *enc; OnigCaseFoldType flags = ONIGENC_CASE_DOWNCASE; flags = check_case_options(argc, argv, flags); str_modify_keep_cr(str); enc = STR_ENC_GET(str); rb_str_check_dummy_enc(enc); if (((flags&ONIGENC_CASE_ASCII_ONLY) && (enc==rb_utf8_encoding() || rb_enc_mbmaxlen(enc)==1)) || (!(flags&ONIGENC_CASE_FOLD_TURKISH_AZERI) && ENC_CODERANGE(str)==ENC_CODERANGE_7BIT)) { char *s = RSTRING_PTR(str), *send = RSTRING_END(str); while (s < send) { unsigned int c = *(unsigned char*)s; if (rb_enc_isascii(c, enc) && 'A' <= c && c <= 'Z') { *s = 'a' + (c - 'A'); flags |= ONIGENC_CASE_MODIFIED; } s++; } } else if (flags&ONIGENC_CASE_ASCII_ONLY) rb_str_ascii_casemap(str, &flags, enc); else str_shared_replace(str, rb_str_casemap(str, &flags, enc)); if (ONIGENC_CASE_MODIFIED&flags) return str; return Qnil; } /* * call-seq: * str.downcase -> new_str * str.downcase([options]) -> new_str * * Returns a copy of str with all uppercase letters replaced with their * lowercase counterparts. Which letters exactly are replaced, and by which * other letters, depends on the presence or absence of options, and on the * +encoding+ of the string. * * The meaning of the +options+ is as follows: * * No option :: * Full Unicode case mapping, suitable for most languages * (see :turkic and :lithuanian options below for exceptions). * Context-dependent case mapping as described in Table 3-14 of the * Unicode standard is currently not supported. * :ascii :: * Only the ASCII region, i.e. the characters ``A'' to ``Z'' and * ``a'' to ``z'', are affected. * This option cannot be combined with any other option. * :turkic :: * Full Unicode case mapping, adapted for Turkic languages * (Turkish, Azerbaijani,...). This means that upper case I is mapped to * lower case dotless i, and so on. * :lithuanian :: * Currently, just full Unicode case mapping. In the future, full Unicode * case mapping adapted for Lithuanian (keeping the dot on the lower case * i even if there is an accent on top). * :fold :: * Only available on +downcase+ and +downcase!+. Unicode case folding, * which is more far-reaching than Unicode case mapping. * This option currently cannot be combined with any other option * (i.e. there is currently no variant for turkic languages). * * Please note that several assumptions that are valid for ASCII-only case * conversions do not hold for more general case conversions. For example, * the length of the result may not be the same as the length of the input * (neither in characters nor in bytes), some roundtrip assumptions * (e.g. str.downcase == str.upcase.downcase) may not apply, and Unicode * normalization (i.e. String#unicode_normalize) is not necessarily maintained * by case mapping operations. * * Non-ASCII case mapping/folding is currently supported for UTF-8, * UTF-16BE/LE, UTF-32BE/LE, and ISO-8859-1~16 Strings/Symbols. * This support will be extended to other encodings. * * "hEllO".downcase #=> "hello" */ static VALUE rb_str_downcase(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_downcase_bang(argc, argv, str); return str; } /* * call-seq: * str.capitalize! -> str or nil * str.capitalize!([options]) -> str or nil * * Modifies str by converting the first character to uppercase and the * remainder to lowercase. Returns nil if no changes are made. * * See String#downcase for meaning of +options+ and use with different encodings. * * a = "hello" * a.capitalize! #=> "Hello" * a #=> "Hello" * a.capitalize! #=> nil */ static VALUE rb_str_capitalize_bang(int argc, VALUE *argv, VALUE str) { rb_encoding *enc; OnigCaseFoldType flags = ONIGENC_CASE_UPCASE | ONIGENC_CASE_TITLECASE; flags = check_case_options(argc, argv, flags); str_modify_keep_cr(str); enc = STR_ENC_GET(str); rb_str_check_dummy_enc(enc); if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil; if (flags&ONIGENC_CASE_ASCII_ONLY) rb_str_ascii_casemap(str, &flags, enc); else str_shared_replace(str, rb_str_casemap(str, &flags, enc)); if (ONIGENC_CASE_MODIFIED&flags) return str; return Qnil; } /* * call-seq: * str.capitalize -> new_str * str.capitalize([options]) -> new_str * * Returns a copy of str with the first character converted to uppercase * and the remainder to lowercase. * * See String#downcase for meaning of +options+ and use with different encodings. * * "hello".capitalize #=> "Hello" * "HELLO".capitalize #=> "Hello" * "123ABC".capitalize #=> "123abc" */ static VALUE rb_str_capitalize(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_capitalize_bang(argc, argv, str); return str; } /* * call-seq: * str.swapcase! -> str or nil * str.swapcase!([options]) -> str or nil * * Equivalent to String#swapcase, but modifies the receiver in * place, returning str, or nil if no changes were made. * * See String#downcase for meaning of +options+ and use with different encodings. */ static VALUE rb_str_swapcase_bang(int argc, VALUE *argv, VALUE str) { rb_encoding *enc; OnigCaseFoldType flags = ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE; flags = check_case_options(argc, argv, flags); str_modify_keep_cr(str); enc = STR_ENC_GET(str); rb_str_check_dummy_enc(enc); if (flags&ONIGENC_CASE_ASCII_ONLY) rb_str_ascii_casemap(str, &flags, enc); else str_shared_replace(str, rb_str_casemap(str, &flags, enc)); if (ONIGENC_CASE_MODIFIED&flags) return str; return Qnil; } /* * call-seq: * str.swapcase -> new_str * str.swapcase([options]) -> new_str * * Returns a copy of str with uppercase alphabetic characters converted * to lowercase and lowercase characters converted to uppercase. * * See String#downcase for meaning of +options+ and use with different encodings. * * "Hello".swapcase #=> "hELLO" * "cYbEr_PuNk11".swapcase #=> "CyBeR_pUnK11" */ static VALUE rb_str_swapcase(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_swapcase_bang(argc, argv, str); return str; } typedef unsigned char *USTR; struct tr { int gen; unsigned int now, max; char *p, *pend; }; static unsigned int trnext(struct tr *t, rb_encoding *enc) { int n; for (;;) { if (!t->gen) { nextpart: if (t->p == t->pend) return -1; if (rb_enc_ascget(t->p, t->pend, &n, enc) == '\\' && t->p + n < t->pend) { t->p += n; } t->now = rb_enc_codepoint_len(t->p, t->pend, &n, enc); t->p += n; if (rb_enc_ascget(t->p, t->pend, &n, enc) == '-' && t->p + n < t->pend) { t->p += n; if (t->p < t->pend) { unsigned int c = rb_enc_codepoint_len(t->p, t->pend, &n, enc); t->p += n; if (t->now > c) { if (t->now < 0x80 && c < 0x80) { rb_raise(rb_eArgError, "invalid range \"%c-%c\" in string transliteration", t->now, c); } else { rb_raise(rb_eArgError, "invalid range in string transliteration"); } continue; /* not reached */ } t->gen = 1; t->max = c; } } return t->now; } else { while (ONIGENC_CODE_TO_MBCLEN(enc, ++t->now) <= 0) { if (t->now == t->max) { t->gen = 0; goto nextpart; } } if (t->now < t->max) { return t->now; } else { t->gen = 0; return t->max; } } } } static VALUE rb_str_delete_bang(int,VALUE*,VALUE); static VALUE tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) { const unsigned int errc = -1; unsigned int trans[256]; rb_encoding *enc, *e1, *e2; struct tr trsrc, trrepl; int cflag = 0; unsigned int c, c0, last = 0; int modify = 0, i, l; char *s, *send; VALUE hash = 0; int singlebyte = single_byte_optimizable(str); int termlen; int cr; #define CHECK_IF_ASCII(c) \ (void)((cr == ENC_CODERANGE_7BIT && !rb_isascii(c)) ? \ (cr = ENC_CODERANGE_VALID) : 0) StringValue(src); StringValue(repl); if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil; if (RSTRING_LEN(repl) == 0) { return rb_str_delete_bang(1, &src, str); } cr = ENC_CODERANGE(str); e1 = rb_enc_check(str, src); e2 = rb_enc_check(str, repl); if (e1 == e2) { enc = e1; } else { enc = rb_enc_check(src, repl); } trsrc.p = RSTRING_PTR(src); trsrc.pend = trsrc.p + RSTRING_LEN(src); if (RSTRING_LEN(src) > 1 && rb_enc_ascget(trsrc.p, trsrc.pend, &l, enc) == '^' && trsrc.p + l < trsrc.pend) { cflag = 1; trsrc.p += l; } trrepl.p = RSTRING_PTR(repl); trrepl.pend = trrepl.p + RSTRING_LEN(repl); trsrc.gen = trrepl.gen = 0; trsrc.now = trrepl.now = 0; trsrc.max = trrepl.max = 0; if (cflag) { for (i=0; i<256; i++) { trans[i] = 1; } while ((c = trnext(&trsrc, enc)) != errc) { if (c < 256) { trans[c] = errc; } else { if (!hash) hash = rb_hash_new(); rb_hash_aset(hash, UINT2NUM(c), Qtrue); } } while ((c = trnext(&trrepl, enc)) != errc) /* retrieve last replacer */; last = trrepl.now; for (i=0; i<256; i++) { if (trans[i] != errc) { trans[i] = last; } } } else { unsigned int r; for (i=0; i<256; i++) { trans[i] = errc; } while ((c = trnext(&trsrc, enc)) != errc) { r = trnext(&trrepl, enc); if (r == errc) r = trrepl.now; if (c < 256) { trans[c] = r; if (rb_enc_codelen(r, enc) != 1) singlebyte = 0; } else { if (!hash) hash = rb_hash_new(); rb_hash_aset(hash, UINT2NUM(c), UINT2NUM(r)); } } } if (cr == ENC_CODERANGE_VALID && rb_enc_asciicompat(e1)) cr = ENC_CODERANGE_7BIT; str_modify_keep_cr(str); s = RSTRING_PTR(str); send = RSTRING_END(str); termlen = rb_enc_mbminlen(enc); if (sflag) { int clen, tlen; long offset, max = RSTRING_LEN(str); unsigned int save = -1; char *buf = ALLOC_N(char, max + termlen), *t = buf; while (s < send) { int may_modify = 0; c0 = c = rb_enc_codepoint_len(s, send, &clen, e1); tlen = enc == e1 ? clen : rb_enc_codelen(c, enc); s += clen; if (c < 256) { c = trans[c]; } else if (hash) { VALUE tmp = rb_hash_lookup(hash, UINT2NUM(c)); if (NIL_P(tmp)) { if (cflag) c = last; else c = errc; } else if (cflag) c = errc; else c = NUM2INT(tmp); } else { c = errc; } if (c != (unsigned int)-1) { if (save == c) { CHECK_IF_ASCII(c); continue; } save = c; tlen = rb_enc_codelen(c, enc); modify = 1; } else { save = -1; c = c0; if (enc != e1) may_modify = 1; } if ((offset = t - buf) + tlen > max) { max = offset + tlen + (send - s); REALLOC_N(buf, char, max + termlen); t = buf + offset; } rb_enc_mbcput(c, t, enc); if (may_modify && memcmp(s, t, tlen) != 0) { modify = 1; } CHECK_IF_ASCII(c); t += tlen; } if (!STR_EMBED_P(str)) { ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str)); } TERM_FILL(t, termlen); RSTRING(str)->as.heap.ptr = buf; RSTRING(str)->as.heap.len = t - buf; STR_SET_NOEMBED(str); RSTRING(str)->as.heap.aux.capa = max; } else if (rb_enc_mbmaxlen(enc) == 1 || (singlebyte && !hash)) { while (s < send) { c = (unsigned char)*s; if (trans[c] != errc) { if (!cflag) { c = trans[c]; *s = c; modify = 1; } else { *s = last; modify = 1; } } CHECK_IF_ASCII(c); s++; } } else { int clen, tlen; long offset, max = (long)((send - s) * 1.2); char *buf = ALLOC_N(char, max + termlen), *t = buf; while (s < send) { int may_modify = 0; c0 = c = rb_enc_codepoint_len(s, send, &clen, e1); tlen = enc == e1 ? clen : rb_enc_codelen(c, enc); if (c < 256) { c = trans[c]; } else if (hash) { VALUE tmp = rb_hash_lookup(hash, UINT2NUM(c)); if (NIL_P(tmp)) { if (cflag) c = last; else c = errc; } else if (cflag) c = errc; else c = NUM2INT(tmp); } else { c = cflag ? last : errc; } if (c != errc) { tlen = rb_enc_codelen(c, enc); modify = 1; } else { c = c0; if (enc != e1) may_modify = 1; } if ((offset = t - buf) + tlen > max) { max = offset + tlen + (long)((send - s) * 1.2); REALLOC_N(buf, char, max + termlen); t = buf + offset; } if (s != t) { rb_enc_mbcput(c, t, enc); if (may_modify && memcmp(s, t, tlen) != 0) { modify = 1; } } CHECK_IF_ASCII(c); s += clen; t += tlen; } if (!STR_EMBED_P(str)) { ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str)); } TERM_FILL(t, termlen); RSTRING(str)->as.heap.ptr = buf; RSTRING(str)->as.heap.len = t - buf; STR_SET_NOEMBED(str); RSTRING(str)->as.heap.aux.capa = max; } if (modify) { if (cr != ENC_CODERANGE_BROKEN) ENC_CODERANGE_SET(str, cr); rb_enc_associate(str, enc); return str; } return Qnil; } /* * call-seq: * str.tr!(from_str, to_str) -> str or nil * * Translates str in place, using the same rules as * String#tr. Returns str, or nil if no * changes were made. */ static VALUE rb_str_tr_bang(VALUE str, VALUE src, VALUE repl) { return tr_trans(str, src, repl, 0); } /* * call-seq: * str.tr(from_str, to_str) => new_str * * Returns a copy of +str+ with the characters in +from_str+ replaced by the * corresponding characters in +to_str+. If +to_str+ is shorter than * +from_str+, it is padded with its last character in order to maintain the * correspondence. * * "hello".tr('el', 'ip') #=> "hippo" * "hello".tr('aeiou', '*') #=> "h*ll*" * "hello".tr('aeiou', 'AA*') #=> "hAll*" * * Both strings may use the c1-c2 notation to denote ranges of * characters, and +from_str+ may start with a ^, which denotes * all characters except those listed. * * "hello".tr('a-y', 'b-z') #=> "ifmmp" * "hello".tr('^aeiou', '*') #=> "*e**o" * * The backslash character \\ can be used to escape * ^ or - and is otherwise ignored unless it * appears at the end of a range or the end of the +from_str+ or +to_str+: * * "hello^world".tr("\\^aeiou", "*") #=> "h*ll**w*rld" * "hello-world".tr("a\\-eo", "*") #=> "h*ll**w*rld" * * "hello\r\nworld".tr("\r", "") #=> "hello\nworld" * "hello\r\nworld".tr("\\r", "") #=> "hello\r\nwold" * "hello\r\nworld".tr("\\\r", "") #=> "hello\nworld" * * "X['\\b']".tr("X\\", "") #=> "['b']" * "X['\\b']".tr("X-\\]", "") #=> "'b'" */ static VALUE rb_str_tr(VALUE str, VALUE src, VALUE repl) { str = rb_str_dup(str); tr_trans(str, src, repl, 0); return str; } #define TR_TABLE_SIZE 257 static void tr_setup_table(VALUE str, char stable[TR_TABLE_SIZE], int first, VALUE *tablep, VALUE *ctablep, rb_encoding *enc) { const unsigned int errc = -1; char buf[256]; struct tr tr; unsigned int c; VALUE table = 0, ptable = 0; int i, l, cflag = 0; tr.p = RSTRING_PTR(str); tr.pend = tr.p + RSTRING_LEN(str); tr.gen = tr.now = tr.max = 0; if (RSTRING_LEN(str) > 1 && rb_enc_ascget(tr.p, tr.pend, &l, enc) == '^') { cflag = 1; tr.p += l; } if (first) { for (i=0; i<256; i++) { stable[i] = 1; } stable[256] = cflag; } else if (stable[256] && !cflag) { stable[256] = 0; } for (i=0; i<256; i++) { buf[i] = cflag; } while ((c = trnext(&tr, enc)) != errc) { if (c < 256) { buf[c & 0xff] = !cflag; } else { VALUE key = UINT2NUM(c); if (!table && (first || *tablep || stable[256])) { if (cflag) { ptable = *ctablep; table = ptable ? ptable : rb_hash_new(); *ctablep = table; } else { table = rb_hash_new(); ptable = *tablep; *tablep = table; } } if (table && (!ptable || (cflag ^ !NIL_P(rb_hash_aref(ptable, key))))) { rb_hash_aset(table, key, Qtrue); } } } for (i=0; i<256; i++) { stable[i] = stable[i] && buf[i]; } if (!table && !cflag) { *tablep = 0; } } static int tr_find(unsigned int c, const char table[TR_TABLE_SIZE], VALUE del, VALUE nodel) { if (c < 256) { return table[c] != 0; } else { VALUE v = UINT2NUM(c); if (del) { if (!NIL_P(rb_hash_lookup(del, v)) && (!nodel || NIL_P(rb_hash_lookup(nodel, v)))) { return TRUE; } } else if (nodel && !NIL_P(rb_hash_lookup(nodel, v))) { return FALSE; } return table[256] ? TRUE : FALSE; } } /* * call-seq: * str.delete!([other_str]+) -> str or nil * * Performs a delete operation in place, returning str, or * nil if str was not modified. */ static VALUE rb_str_delete_bang(int argc, VALUE *argv, VALUE str) { char squeez[TR_TABLE_SIZE]; rb_encoding *enc = 0; char *s, *send, *t; VALUE del = 0, nodel = 0; int modify = 0; int i, ascompat, cr; if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil; rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS); for (i=0; i new_str * * Returns a copy of str with all characters in the intersection of its * arguments deleted. Uses the same rules for building the set of characters as * String#count. * * "hello".delete "l","lo" #=> "heo" * "hello".delete "lo" #=> "he" * "hello".delete "aeiou", "^e" #=> "hell" * "hello".delete "ej-m" #=> "ho" */ static VALUE rb_str_delete(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_delete_bang(argc, argv, str); return str; } /* * call-seq: * str.squeeze!([other_str]*) -> str or nil * * Squeezes str in place, returning either str, or * nil if no changes were made. */ static VALUE rb_str_squeeze_bang(int argc, VALUE *argv, VALUE str) { char squeez[TR_TABLE_SIZE]; rb_encoding *enc = 0; VALUE del = 0, nodel = 0; char *s, *send, *t; int i, modify = 0; int ascompat, singlebyte = single_byte_optimizable(str); unsigned int save; if (argc == 0) { enc = STR_ENC_GET(str); } else { for (i=0; i 0 && !squeez[c])) { *t++ = save = c; } } } else { while (s < send) { unsigned int c; int clen; if (ascompat && (c = *(unsigned char*)s) < 0x80) { if (c != save || (argc > 0 && !squeez[c])) { *t++ = save = c; } s++; } else { c = rb_enc_codepoint_len(s, send, &clen, enc); if (c != save || (argc > 0 && !tr_find(c, squeez, del, nodel))) { if (t != s) rb_enc_mbcput(c, t, enc); save = c; t += clen; } s += clen; } } } TERM_FILL(t, TERM_LEN(str)); if (t - RSTRING_PTR(str) != RSTRING_LEN(str)) { STR_SET_LEN(str, t - RSTRING_PTR(str)); modify = 1; } if (modify) return str; return Qnil; } /* * call-seq: * str.squeeze([other_str]*) -> new_str * * Builds a set of characters from the other_str parameter(s) using the * procedure described for String#count. Returns a new string * where runs of the same character that occur in this set are replaced by a * single character. If no arguments are given, all runs of identical * characters are replaced by a single character. * * "yellow moon".squeeze #=> "yelow mon" * " now is the".squeeze(" ") #=> " now is the" * "putters shoot balls".squeeze("m-z") #=> "puters shot balls" */ static VALUE rb_str_squeeze(int argc, VALUE *argv, VALUE str) { str = rb_str_dup(str); rb_str_squeeze_bang(argc, argv, str); return str; } /* * call-seq: * str.tr_s!(from_str, to_str) -> str or nil * * Performs String#tr_s processing on str in place, * returning str, or nil if no changes were made. */ static VALUE rb_str_tr_s_bang(VALUE str, VALUE src, VALUE repl) { return tr_trans(str, src, repl, 1); } /* * call-seq: * str.tr_s(from_str, to_str) -> new_str * * Processes a copy of str as described under String#tr, * then removes duplicate characters in regions that were affected by the * translation. * * "hello".tr_s('l', 'r') #=> "hero" * "hello".tr_s('el', '*') #=> "h*o" * "hello".tr_s('el', 'hx') #=> "hhxo" */ static VALUE rb_str_tr_s(VALUE str, VALUE src, VALUE repl) { str = rb_str_dup(str); tr_trans(str, src, repl, 1); return str; } /* * call-seq: * str.count([other_str]+) -> integer * * Each +other_str+ parameter defines a set of characters to count. The * intersection of these sets defines the characters to count in +str+. Any * +other_str+ that starts with a caret ^ is negated. The * sequence c1-c2 means all characters between c1 and c2. The * backslash character \\ can be used to escape ^ or * - and is otherwise ignored unless it appears at the end of a * sequence or the end of a +other_str+. * * a = "hello world" * a.count "lo" #=> 5 * a.count "lo", "o" #=> 2 * a.count "hello", "^l" #=> 4 * a.count "ej-m" #=> 4 * * "hello^world".count "\\^aeiou" #=> 4 * "hello-world".count "a\\-eo" #=> 4 * * c = "hello world\\r\\n" * c.count "\\" #=> 2 * c.count "\\A" #=> 0 * c.count "X-\\w" #=> 3 */ static VALUE rb_str_count(int argc, VALUE *argv, VALUE str) { char table[TR_TABLE_SIZE]; rb_encoding *enc = 0; VALUE del = 0, nodel = 0, tstr; char *s, *send; int i; int ascompat; rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS); tstr = argv[0]; StringValue(tstr); enc = rb_enc_check(str, tstr); if (argc == 1) { const char *ptstr; if (RSTRING_LEN(tstr) == 1 && rb_enc_asciicompat(enc) && (ptstr = RSTRING_PTR(tstr), ONIGENC_IS_ALLOWED_REVERSE_MATCH(enc, (const unsigned char *)ptstr, (const unsigned char *)ptstr+1)) && !is_broken_string(str)) { int n = 0; int clen; unsigned char c = rb_enc_codepoint_len(ptstr, ptstr+1, &clen, enc); s = RSTRING_PTR(str); if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0); send = RSTRING_END(str); while (s < send) { if (*(unsigned char*)s++ == c) n++; } return INT2NUM(n); } } tr_setup_table(tstr, table, TRUE, &del, &nodel, enc); for (i=1; i an_array * * Divides str into substrings based on a delimiter, returning an array * of these substrings. * * If pattern is a String, then its contents are used as * the delimiter when splitting str. If pattern is a single * space, str is split on whitespace, with leading whitespace and runs * of contiguous whitespace characters ignored. * * If pattern is a Regexp, str is divided where the * pattern matches. Whenever the pattern matches a zero-length string, * str is split into individual characters. If pattern contains * groups, the respective matches will be returned in the array as well. * * If pattern is nil, the value of $; is used. * If $; is nil (which is the default), str is * split on whitespace as if ' ' were specified. * * If the limit parameter is omitted, trailing null fields are * suppressed. If limit is a positive number, at most that number * of split substrings will be returned (captured groups will be returned * as well, but are not counted towards the limit). * If limit is 1, the entire * string is returned as the only entry in an array. If negative, there is no * limit to the number of fields returned, and trailing null fields are not * suppressed. * * When the input +str+ is empty an empty Array is returned as the string is * considered to have no fields to split. * * " now's the time".split #=> ["now's", "the", "time"] * " now's the time".split(' ') #=> ["now's", "the", "time"] * " now's the time".split(/ /) #=> ["", "now's", "", "the", "time"] * "1, 2.34,56, 7".split(%r{,\s*}) #=> ["1", "2.34", "56", "7"] * "hello".split(//) #=> ["h", "e", "l", "l", "o"] * "hello".split(//, 3) #=> ["h", "e", "llo"] * "hi mom".split(%r{\s*}) #=> ["h", "i", "m", "o", "m"] * * "mellow yellow".split("ello") #=> ["m", "w y", "w"] * "1,2,,3,4,,".split(',') #=> ["1", "2", "", "3", "4"] * "1,2,,3,4,,".split(',', 4) #=> ["1", "2", "", "3,4,,"] * "1,2,,3,4,,".split(',', -4) #=> ["1", "2", "", "3", "4", "", ""] * * "1:2:3".split(/(:)()()/, 2) #=> ["1", ":", "", "", "2:3"] * * "".split(',', -1) #=> [] */ static VALUE rb_str_split_m(int argc, VALUE *argv, VALUE str) { rb_encoding *enc; VALUE spat; VALUE limit; enum {awk, string, regexp} split_type; long beg, end, i = 0; int lim = 0; VALUE result, tmp; if (rb_scan_args(argc, argv, "02", &spat, &limit) == 2) { lim = NUM2INT(limit); if (lim <= 0) limit = Qnil; else if (lim == 1) { if (RSTRING_LEN(str) == 0) return rb_ary_new2(0); return rb_ary_new3(1, rb_str_dup(str)); } i = 1; } enc = STR_ENC_GET(str); split_type = regexp; if (!NIL_P(spat)) { spat = get_pat_quoted(spat, 0); } else if (NIL_P(spat = rb_fs)) { split_type = awk; } else if (!(spat = rb_fs_check(spat))) { rb_raise(rb_eTypeError, "value of $; must be String or Regexp"); } if (split_type != awk) { if (BUILTIN_TYPE(spat) == T_STRING) { rb_encoding *enc2 = STR_ENC_GET(spat); mustnot_broken(spat); split_type = string; if (RSTRING_LEN(spat) == 0) { /* Special case - split into chars */ spat = rb_reg_regcomp(spat); split_type = regexp; } else if (rb_enc_asciicompat(enc2) == 1) { if (RSTRING_LEN(spat) == 1 && RSTRING_PTR(spat)[0] == ' ') { split_type = awk; } } else { int l; if (rb_enc_ascget(RSTRING_PTR(spat), RSTRING_END(spat), &l, enc2) == ' ' && RSTRING_LEN(spat) == l) { split_type = awk; } } } } result = rb_ary_new(); beg = 0; if (split_type == awk) { char *ptr = RSTRING_PTR(str); char *eptr = RSTRING_END(str); char *bptr = ptr; int skip = 1; unsigned int c; end = beg; if (is_ascii_string(str)) { while (ptr < eptr) { c = (unsigned char)*ptr++; if (skip) { if (ascii_isspace(c)) { beg = ptr - bptr; } else { end = ptr - bptr; skip = 0; if (!NIL_P(limit) && lim <= i) break; } } else if (ascii_isspace(c)) { rb_ary_push(result, rb_str_subseq(str, beg, end-beg)); skip = 1; beg = ptr - bptr; if (!NIL_P(limit)) ++i; } else { end = ptr - bptr; } } } else { while (ptr < eptr) { int n; c = rb_enc_codepoint_len(ptr, eptr, &n, enc); ptr += n; if (skip) { if (rb_isspace(c)) { beg = ptr - bptr; } else { end = ptr - bptr; skip = 0; if (!NIL_P(limit) && lim <= i) break; } } else if (rb_isspace(c)) { rb_ary_push(result, rb_str_subseq(str, beg, end-beg)); skip = 1; beg = ptr - bptr; if (!NIL_P(limit)) ++i; } else { end = ptr - bptr; } } } } else if (split_type == string) { char *ptr = RSTRING_PTR(str); char *str_start = ptr; char *substr_start = ptr; char *eptr = RSTRING_END(str); char *sptr = RSTRING_PTR(spat); long slen = RSTRING_LEN(spat); mustnot_broken(str); enc = rb_enc_check(str, spat); while (ptr < eptr && (end = rb_memsearch(sptr, slen, ptr, eptr - ptr, enc)) >= 0) { /* Check we are at the start of a char */ char *t = rb_enc_right_char_head(ptr, ptr + end, eptr, enc); if (t != ptr + end) { ptr = t; continue; } rb_ary_push(result, rb_str_subseq(str, substr_start - str_start, (ptr+end) - substr_start)); ptr += end + slen; substr_start = ptr; if (!NIL_P(limit) && lim <= ++i) break; } beg = ptr - str_start; } else { char *ptr = RSTRING_PTR(str); long len = RSTRING_LEN(str); long start = beg; long idx; int last_null = 0; struct re_registers *regs; while ((end = rb_reg_search(spat, str, start, 0)) >= 0) { regs = RMATCH_REGS(rb_backref_get()); if (start == end && BEG(0) == END(0)) { if (!ptr) { rb_ary_push(result, str_new_empty(str)); break; } else if (last_null == 1) { rb_ary_push(result, rb_str_subseq(str, beg, rb_enc_fast_mbclen(ptr+beg, ptr+len, enc))); beg = start; } else { if (start == len) start++; else start += rb_enc_fast_mbclen(ptr+start,ptr+len,enc); last_null = 1; continue; } } else { rb_ary_push(result, rb_str_subseq(str, beg, end-beg)); beg = start = END(0); } last_null = 0; for (idx=1; idx < regs->num_regs; idx++) { if (BEG(idx) == -1) continue; if (BEG(idx) == END(idx)) tmp = str_new_empty(str); else tmp = rb_str_subseq(str, BEG(idx), END(idx)-BEG(idx)); rb_ary_push(result, tmp); } if (!NIL_P(limit) && lim <= ++i) break; } } if (RSTRING_LEN(str) > 0 && (!NIL_P(limit) || RSTRING_LEN(str) > beg || lim < 0)) { if (RSTRING_LEN(str) == beg) tmp = str_new_empty(str); else tmp = rb_str_subseq(str, beg, RSTRING_LEN(str)-beg); rb_ary_push(result, tmp); } if (NIL_P(limit) && lim == 0) { long len; while ((len = RARRAY_LEN(result)) > 0 && (tmp = RARRAY_AREF(result, len-1), RSTRING_LEN(tmp) == 0)) rb_ary_pop(result); } return result; } VALUE rb_str_split(VALUE str, const char *sep0) { VALUE sep; StringValue(str); sep = rb_str_new_cstr(sep0); return rb_str_split_m(1, &sep, str); } static int enumerator_wantarray(const char *method) { if (rb_block_given_p()) { #if STRING_ENUMERATORS_WANTARRAY rb_warn("given block not used"); #else rb_warning("passing a block to String#%s is deprecated", method); return 0; #endif } return 1; } #define WANTARRAY(m, size) \ (enumerator_wantarray(m) ? rb_ary_new_capa(size) : 0) static inline int enumerator_element(VALUE ary, VALUE e) { if (ary) { rb_ary_push(ary, e); return 0; } else { rb_yield(e); return 1; } } #define ENUM_ELEM(ary, e) enumerator_element(ary, e) static const char * chomp_newline(const char *p, const char *e, rb_encoding *enc) { const char *prev = rb_enc_prev_char(p, e, e, enc); if (rb_enc_is_newline(prev, e, enc)) { e = prev; prev = rb_enc_prev_char(p, e, e, enc); if (prev && rb_enc_ascget(prev, e, NULL, enc) == '\r') e = prev; } return e; } static VALUE rb_str_enumerate_lines(int argc, VALUE *argv, VALUE str, VALUE ary) { rb_encoding *enc; VALUE line, rs, orig = str, opts = Qnil, chomp = Qfalse; const char *ptr, *pend, *subptr, *subend, *rsptr, *hit, *adjusted; long pos, len, rslen; int rsnewline = 0; if (rb_scan_args(argc, argv, "01:", &rs, &opts) == 0) rs = rb_rs; if (!NIL_P(opts)) { static ID keywords[1]; if (!keywords[0]) { keywords[0] = rb_intern_const("chomp"); } rb_get_kwargs(opts, keywords, 0, 1, &chomp); chomp = (chomp != Qundef && RTEST(chomp)); } if (NIL_P(rs)) { if (!ENUM_ELEM(ary, str)) { return ary; } else { return orig; } } if (!RSTRING_LEN(str)) goto end; str = rb_str_new_frozen(str); ptr = subptr = RSTRING_PTR(str); pend = RSTRING_END(str); len = RSTRING_LEN(str); StringValue(rs); rslen = RSTRING_LEN(rs); if (rs == rb_default_rs) enc = rb_enc_get(str); else enc = rb_enc_check(str, rs); if (rslen == 0) { /* paragraph mode */ int n; const char *eol = NULL; subend = subptr; while (subend < pend) { do { if (rb_enc_ascget(subend, pend, &n, enc) != '\r') n = 0; rslen = n + rb_enc_mbclen(subend + n, pend, enc); if (rb_enc_is_newline(subend + n, pend, enc)) { if (eol == subend) break; subend += rslen; if (subptr) eol = subend; } else { if (!subptr) subptr = subend; subend += rslen; } rslen = 0; } while (subend < pend); if (!subptr) break; line = rb_str_subseq(str, subptr - ptr, subend - subptr + (chomp ? 0 : rslen)); if (ENUM_ELEM(ary, line)) { str_mod_check(str, ptr, len); } subptr = eol = NULL; } goto end; } else { rsptr = RSTRING_PTR(rs); if (RSTRING_LEN(rs) == rb_enc_mbminlen(enc) && rb_enc_is_newline(rsptr, rsptr + RSTRING_LEN(rs), enc)) { rsnewline = 1; } } if ((rs == rb_default_rs) && !rb_enc_asciicompat(enc)) { rs = rb_str_new(rsptr, rslen); rs = rb_str_encode(rs, rb_enc_from_encoding(enc), 0, Qnil); rsptr = RSTRING_PTR(rs); rslen = RSTRING_LEN(rs); } while (subptr < pend) { pos = rb_memsearch(rsptr, rslen, subptr, pend - subptr, enc); if (pos < 0) break; hit = subptr + pos; adjusted = rb_enc_right_char_head(subptr, hit, pend, enc); if (hit != adjusted) { subptr = adjusted; continue; } subend = hit += rslen; if (chomp) { if (rsnewline) { subend = chomp_newline(subptr, subend, enc); } else { subend -= rslen; } } line = rb_str_subseq(str, subptr - ptr, subend - subptr); if (ENUM_ELEM(ary, line)) { str_mod_check(str, ptr, len); } subptr = hit; } if (subptr != pend) { if (chomp) { if (rsnewline) { pend = chomp_newline(subptr, pend, enc); } else if (pend - subptr >= rslen && memcmp(pend - rslen, rsptr, rslen) == 0) { pend -= rslen; } } line = rb_str_subseq(str, subptr - ptr, pend - subptr); ENUM_ELEM(ary, line); RB_GC_GUARD(str); } end: if (ary) return ary; else return orig; } /* * call-seq: * str.each_line(separator=$/ [, getline_args]) {|substr| block } -> str * str.each_line(separator=$/ [, getline_args]) -> an_enumerator * * Splits str using the supplied parameter as the record * separator ($/ by default), passing each substring in * turn to the supplied block. If a zero-length record separator is * supplied, the string is split into paragraphs delimited by * multiple successive newlines. * * See IO.readlines for details about getline_args. * * If no block is given, an enumerator is returned instead. * * print "Example one\n" * "hello\nworld".each_line {|s| p s} * print "Example two\n" * "hello\nworld".each_line('l') {|s| p s} * print "Example three\n" * "hello\n\n\nworld".each_line('') {|s| p s} * * produces: * * Example one * "hello\n" * "world" * Example two * "hel" * "l" * "o\nworl" * "d" * Example three * "hello\n\n" * "world" */ static VALUE rb_str_each_line(int argc, VALUE *argv, VALUE str) { RETURN_SIZED_ENUMERATOR(str, argc, argv, 0); return rb_str_enumerate_lines(argc, argv, str, 0); } /* * call-seq: * str.lines(separator=$/) -> an_array * * Returns an array of lines in str split using the supplied * record separator ($/ by default). This is a * shorthand for str.each_line(separator).to_a. * * If a block is given, which is a deprecated form, works the same as * each_line. */ static VALUE rb_str_lines(int argc, VALUE *argv, VALUE str) { VALUE ary = WANTARRAY("lines", 0); return rb_str_enumerate_lines(argc, argv, str, ary); } static VALUE rb_str_each_byte_size(VALUE str, VALUE args, VALUE eobj) { return LONG2FIX(RSTRING_LEN(str)); } static VALUE rb_str_enumerate_bytes(VALUE str, VALUE ary) { long i; for (i=0; i str * str.each_byte -> an_enumerator * * Passes each byte in str to the given block, or returns an * enumerator if no block is given. * * "hello".each_byte {|c| print c, ' ' } * * produces: * * 104 101 108 108 111 */ static VALUE rb_str_each_byte(VALUE str) { RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_byte_size); return rb_str_enumerate_bytes(str, 0); } /* * call-seq: * str.bytes -> an_array * * Returns an array of bytes in str. This is a shorthand for * str.each_byte.to_a. * * If a block is given, which is a deprecated form, works the same as * each_byte. */ static VALUE rb_str_bytes(VALUE str) { VALUE ary = WANTARRAY("bytes", RSTRING_LEN(str)); return rb_str_enumerate_bytes(str, ary); } static VALUE rb_str_each_char_size(VALUE str, VALUE args, VALUE eobj) { return rb_str_length(str); } static VALUE rb_str_enumerate_chars(VALUE str, VALUE ary) { VALUE orig = str; long i, len, n; const char *ptr; rb_encoding *enc; str = rb_str_new_frozen(str); ptr = RSTRING_PTR(str); len = RSTRING_LEN(str); enc = rb_enc_get(str); if (ENC_CODERANGE_CLEAN_P(ENC_CODERANGE(str))) { for (i = 0; i < len; i += n) { n = rb_enc_fast_mbclen(ptr + i, ptr + len, enc); ENUM_ELEM(ary, rb_str_subseq(str, i, n)); } } else { for (i = 0; i < len; i += n) { n = rb_enc_mbclen(ptr + i, ptr + len, enc); ENUM_ELEM(ary, rb_str_subseq(str, i, n)); } } RB_GC_GUARD(str); if (ary) return ary; else return orig; } /* * call-seq: * str.each_char {|cstr| block } -> str * str.each_char -> an_enumerator * * Passes each character in str to the given block, or returns * an enumerator if no block is given. * * "hello".each_char {|c| print c, ' ' } * * produces: * * h e l l o */ static VALUE rb_str_each_char(VALUE str) { RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_char_size); return rb_str_enumerate_chars(str, 0); } /* * call-seq: * str.chars -> an_array * * Returns an array of characters in str. This is a shorthand * for str.each_char.to_a. * * If a block is given, which is a deprecated form, works the same as * each_char. */ static VALUE rb_str_chars(VALUE str) { VALUE ary = WANTARRAY("chars", rb_str_strlen(str)); return rb_str_enumerate_chars(str, ary); } static VALUE rb_str_enumerate_codepoints(VALUE str, VALUE ary) { VALUE orig = str; int n; unsigned int c; const char *ptr, *end; rb_encoding *enc; if (single_byte_optimizable(str)) return rb_str_enumerate_bytes(str, ary); str = rb_str_new_frozen(str); ptr = RSTRING_PTR(str); end = RSTRING_END(str); enc = STR_ENC_GET(str); while (ptr < end) { c = rb_enc_codepoint_len(ptr, end, &n, enc); ENUM_ELEM(ary, UINT2NUM(c)); ptr += n; } RB_GC_GUARD(str); if (ary) return ary; else return orig; } /* * call-seq: * str.each_codepoint {|integer| block } -> str * str.each_codepoint -> an_enumerator * * Passes the Integer ordinal of each character in str, * also known as a codepoint when applied to Unicode strings to the * given block. For encodings other than UTF-8/UTF-16(BE|LE)/UTF-32(BE|LE), * values are directly derived from the binary representation * of each character. * * If no block is given, an enumerator is returned instead. * * "hello\u0639".each_codepoint {|c| print c, ' ' } * * produces: * * 104 101 108 108 111 1593 */ static VALUE rb_str_each_codepoint(VALUE str) { RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_char_size); return rb_str_enumerate_codepoints(str, 0); } /* * call-seq: * str.codepoints -> an_array * * Returns an array of the Integer ordinals of the * characters in str. This is a shorthand for * str.each_codepoint.to_a. * * If a block is given, which is a deprecated form, works the same as * each_codepoint. */ static VALUE rb_str_codepoints(VALUE str) { VALUE ary = WANTARRAY("codepoints", rb_str_strlen(str)); return rb_str_enumerate_codepoints(str, ary); } static VALUE rb_str_enumerate_grapheme_clusters(VALUE str, VALUE ary) { VALUE orig = str; regex_t *reg_grapheme_cluster = NULL; static regex_t *reg_grapheme_cluster_utf8 = NULL; int encidx = ENCODING_GET(str); rb_encoding *enc = rb_enc_from_index(encidx); int unicode_p = rb_enc_unicode_p(enc); const char *ptr, *end; if (!unicode_p || single_byte_optimizable(str)) { return rb_str_enumerate_chars(str, ary); } /* synchronize */ if (encidx == rb_utf8_encindex() && reg_grapheme_cluster_utf8) { reg_grapheme_cluster = reg_grapheme_cluster_utf8; } if (!reg_grapheme_cluster) { const OnigUChar source[] = "\\X"; int r = onig_new(®_grapheme_cluster, source, source + sizeof(source) - 1, ONIG_OPTION_DEFAULT, enc, OnigDefaultSyntax, NULL); if (r) { rb_bug("cannot compile grapheme cluster regexp"); } if (encidx == rb_utf8_encindex()) { reg_grapheme_cluster_utf8 = reg_grapheme_cluster; } } if (!ary) str = rb_str_new_frozen(str); ptr = RSTRING_PTR(str); end = RSTRING_END(str); while (ptr < end) { OnigPosition len = onig_match(reg_grapheme_cluster, (const OnigUChar *)ptr, (const OnigUChar *)end, (const OnigUChar *)ptr, NULL, 0); if (len == 0) break; if (len < 0) { break; } ENUM_ELEM(ary, rb_enc_str_new(ptr, len, enc)); ptr += len; } RB_GC_GUARD(str); if (ary) return ary; else return orig; } /* * call-seq: * str.each_grapheme_cluster {|cstr| block } -> str * str.each_grapheme_cluster -> an_enumerator * * Passes each grapheme cluster in str to the given block, or returns * an enumerator if no block is given. * Unlike String#each_char, this enumerates by grapheme clusters defined by * Unicode Standard Annex #29 http://unicode.org/reports/tr29/ * * "a\u0300".each_char.to_a.size #=> 2 * "a\u0300".each_grapheme_cluster.to_a.size #=> 1 * */ static VALUE rb_str_each_grapheme_cluster(VALUE str) { RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_char_size); return rb_str_enumerate_grapheme_clusters(str, 0); } /* * call-seq: * str.grapheme_clusters -> an_array * * Returns an array of grapheme clusters in str. This is a shorthand * for str.each_grapheme_cluster.to_a. * * If a block is given, which is a deprecated form, works the same as * each_grapheme_cluster. */ static VALUE rb_str_grapheme_clusters(VALUE str) { VALUE ary = WANTARRAY("grapheme_clusters", rb_str_strlen(str)); return rb_str_enumerate_grapheme_clusters(str, ary); } static long chopped_length(VALUE str) { rb_encoding *enc = STR_ENC_GET(str); const char *p, *p2, *beg, *end; beg = RSTRING_PTR(str); end = beg + RSTRING_LEN(str); if (beg > end) return 0; p = rb_enc_prev_char(beg, end, end, enc); if (!p) return 0; if (p > beg && rb_enc_ascget(p, end, 0, enc) == '\n') { p2 = rb_enc_prev_char(beg, p, end, enc); if (p2 && rb_enc_ascget(p2, end, 0, enc) == '\r') p = p2; } return p - beg; } /* * call-seq: * str.chop! -> str or nil * * Processes str as for String#chop, returning str, * or nil if str is the empty string. See also * String#chomp!. */ static VALUE rb_str_chop_bang(VALUE str) { str_modify_keep_cr(str); if (RSTRING_LEN(str) > 0) { long len; len = chopped_length(str); STR_SET_LEN(str, len); TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str)); if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) { ENC_CODERANGE_CLEAR(str); } return str; } return Qnil; } /* * call-seq: * str.chop -> new_str * * Returns a new String with the last character removed. If the * string ends with \r\n, both characters are removed. Applying * chop to an empty string returns an empty * string. String#chomp is often a safer alternative, as it leaves * the string unchanged if it doesn't end in a record separator. * * "string\r\n".chop #=> "string" * "string\n\r".chop #=> "string\n" * "string\n".chop #=> "string" * "string".chop #=> "strin" * "x".chop.chop #=> "" */ static VALUE rb_str_chop(VALUE str) { return rb_str_subseq(str, 0, chopped_length(str)); } static long chompped_length(VALUE str, VALUE rs) { rb_encoding *enc; int newline; char *pp, *e, *rsptr; long rslen; char *const p = RSTRING_PTR(str); long len = RSTRING_LEN(str); if (len == 0) return 0; e = p + len; if (rs == rb_default_rs) { smart_chomp: enc = rb_enc_get(str); if (rb_enc_mbminlen(enc) > 1) { pp = rb_enc_left_char_head(p, e-rb_enc_mbminlen(enc), e, enc); if (rb_enc_is_newline(pp, e, enc)) { e = pp; } pp = e - rb_enc_mbminlen(enc); if (pp >= p) { pp = rb_enc_left_char_head(p, pp, e, enc); if (rb_enc_ascget(pp, e, 0, enc) == '\r') { e = pp; } } } else { switch (*(e-1)) { /* not e[-1] to get rid of VC bug */ case '\n': if (--e > p && *(e-1) == '\r') { --e; } break; case '\r': --e; break; } } return e - p; } enc = rb_enc_get(str); RSTRING_GETMEM(rs, rsptr, rslen); if (rslen == 0) { if (rb_enc_mbminlen(enc) > 1) { while (e > p) { pp = rb_enc_left_char_head(p, e-rb_enc_mbminlen(enc), e, enc); if (!rb_enc_is_newline(pp, e, enc)) break; e = pp; pp -= rb_enc_mbminlen(enc); if (pp >= p) { pp = rb_enc_left_char_head(p, pp, e, enc); if (rb_enc_ascget(pp, e, 0, enc) == '\r') { e = pp; } } } } else { while (e > p && *(e-1) == '\n') { --e; if (e > p && *(e-1) == '\r') --e; } } return e - p; } if (rslen > len) return len; enc = rb_enc_get(rs); newline = rsptr[rslen-1]; if (rslen == rb_enc_mbminlen(enc)) { if (rslen == 1) { if (newline == '\n') goto smart_chomp; } else { if (rb_enc_is_newline(rsptr, rsptr+rslen, enc)) goto smart_chomp; } } enc = rb_enc_check(str, rs); if (is_broken_string(rs)) { return len; } pp = e - rslen; if (p[len-1] == newline && (rslen <= 1 || memcmp(rsptr, pp, rslen) == 0)) { if (rb_enc_left_char_head(p, pp, e, enc) == pp) return len - rslen; RB_GC_GUARD(rs); } return len; } /*! * Returns the separator for arguments of rb_str_chomp. * * @return returns rb_ps ($/) as default, the default value of rb_ps ($/) is "\n". */ static VALUE chomp_rs(int argc, const VALUE *argv) { rb_check_arity(argc, 0, 1); if (argc > 0) { VALUE rs = argv[0]; if (!NIL_P(rs)) StringValue(rs); return rs; } else { return rb_rs; } } VALUE rb_str_chomp_string(VALUE str, VALUE rs) { long olen = RSTRING_LEN(str); long len = chompped_length(str, rs); if (len >= olen) return Qnil; str_modify_keep_cr(str); STR_SET_LEN(str, len); TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str)); if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) { ENC_CODERANGE_CLEAR(str); } return str; } /* * call-seq: * str.chomp!(separator=$/) -> str or nil * * Modifies str in place as described for String#chomp, * returning str, or nil if no modifications were made. */ static VALUE rb_str_chomp_bang(int argc, VALUE *argv, VALUE str) { VALUE rs; str_modifiable(str); if (RSTRING_LEN(str) == 0) return Qnil; rs = chomp_rs(argc, argv); if (NIL_P(rs)) return Qnil; return rb_str_chomp_string(str, rs); } /* * call-seq: * str.chomp(separator=$/) -> new_str * * Returns a new String with the given record separator removed * from the end of str (if present). If $/ has not been * changed from the default Ruby record separator, then chomp also * removes carriage return characters (that is it will remove \n, * \r, and \r\n). If $/ is an empty string, * it will remove all trailing newlines from the string. * * "hello".chomp #=> "hello" * "hello\n".chomp #=> "hello" * "hello\r\n".chomp #=> "hello" * "hello\n\r".chomp #=> "hello\n" * "hello\r".chomp #=> "hello" * "hello \n there".chomp #=> "hello \n there" * "hello".chomp("llo") #=> "he" * "hello\r\n\r\n".chomp('') #=> "hello" * "hello\r\n\r\r\n".chomp('') #=> "hello\r\n\r" */ static VALUE rb_str_chomp(int argc, VALUE *argv, VALUE str) { VALUE rs = chomp_rs(argc, argv); if (NIL_P(rs)) return rb_str_dup(str); return rb_str_subseq(str, 0, chompped_length(str, rs)); } static long lstrip_offset(VALUE str, const char *s, const char *e, rb_encoding *enc) { const char *const start = s; if (!s || s >= e) return 0; /* remove spaces at head */ if (single_byte_optimizable(str)) { while (s < e && ascii_isspace(*s)) s++; } else { while (s < e) { int n; unsigned int cc = rb_enc_codepoint_len(s, e, &n, enc); if (!rb_isspace(cc)) break; s += n; } } return s - start; } /* * call-seq: * str.lstrip! -> self or nil * * Removes leading whitespace from str, returning nil if no * change was made. See also String#rstrip! and * String#strip!. * * Refer to strip for the definition of whitespace. * * " hello ".lstrip! #=> "hello " * "hello ".lstrip! #=> nil * "hello".lstrip! #=> nil */ static VALUE rb_str_lstrip_bang(VALUE str) { rb_encoding *enc; char *start, *s; long olen, loffset; str_modify_keep_cr(str); enc = STR_ENC_GET(str); RSTRING_GETMEM(str, start, olen); loffset = lstrip_offset(str, start, start+olen, enc); if (loffset > 0) { long len = olen-loffset; s = start + loffset; memmove(start, s, len); STR_SET_LEN(str, len); #if !SHARABLE_MIDDLE_SUBSTRING TERM_FILL(start+len, rb_enc_mbminlen(enc)); #endif return str; } return Qnil; } /* * call-seq: * str.lstrip -> new_str * * Returns a copy of str with leading whitespace removed. See also * String#rstrip and String#strip. * * Refer to strip for the definition of whitespace. * * " hello ".lstrip #=> "hello " * "hello".lstrip #=> "hello" */ static VALUE rb_str_lstrip(VALUE str) { char *start; long len, loffset; RSTRING_GETMEM(str, start, len); loffset = lstrip_offset(str, start, start+len, STR_ENC_GET(str)); if (loffset <= 0) return rb_str_dup(str); return rb_str_subseq(str, loffset, len - loffset); } static long rstrip_offset(VALUE str, const char *s, const char *e, rb_encoding *enc) { const char *t; rb_str_check_dummy_enc(enc); if (!s || s >= e) return 0; t = e; /* remove trailing spaces or '\0's */ if (single_byte_optimizable(str)) { unsigned char c; while (s < t && ((c = *(t-1)) == '\0' || ascii_isspace(c))) t--; } else { char *tp; while ((tp = rb_enc_prev_char(s, t, e, enc)) != NULL) { unsigned int c = rb_enc_codepoint(tp, e, enc); if (c && !rb_isspace(c)) break; t = tp; } } return e - t; } /* * call-seq: * str.rstrip! -> self or nil * * Removes trailing whitespace from str, returning nil if * no change was made. See also String#lstrip! and * String#strip!. * * Refer to strip for the definition of whitespace. * * " hello ".rstrip! #=> " hello" * " hello".rstrip! #=> nil * "hello".rstrip! #=> nil */ static VALUE rb_str_rstrip_bang(VALUE str) { rb_encoding *enc; char *start; long olen, roffset; str_modify_keep_cr(str); enc = STR_ENC_GET(str); RSTRING_GETMEM(str, start, olen); roffset = rstrip_offset(str, start, start+olen, enc); if (roffset > 0) { long len = olen - roffset; STR_SET_LEN(str, len); #if !SHARABLE_MIDDLE_SUBSTRING TERM_FILL(start+len, rb_enc_mbminlen(enc)); #endif return str; } return Qnil; } /* * call-seq: * str.rstrip -> new_str * * Returns a copy of str with trailing whitespace removed. See also * String#lstrip and String#strip. * * Refer to strip for the definition of whitespace. * * " hello ".rstrip #=> " hello" * "hello".rstrip #=> "hello" */ static VALUE rb_str_rstrip(VALUE str) { rb_encoding *enc; char *start; long olen, roffset; enc = STR_ENC_GET(str); RSTRING_GETMEM(str, start, olen); roffset = rstrip_offset(str, start, start+olen, enc); if (roffset <= 0) return rb_str_dup(str); return rb_str_subseq(str, 0, olen-roffset); } /* * call-seq: * str.strip! -> str or nil * * Removes leading and trailing whitespace from str. Returns * nil if str was not altered. * * Refer to strip for the definition of whitespace. */ static VALUE rb_str_strip_bang(VALUE str) { char *start; long olen, loffset, roffset; rb_encoding *enc; str_modify_keep_cr(str); enc = STR_ENC_GET(str); RSTRING_GETMEM(str, start, olen); loffset = lstrip_offset(str, start, start+olen, enc); roffset = rstrip_offset(str, start+loffset, start+olen, enc); if (loffset > 0 || roffset > 0) { long len = olen-roffset; if (loffset > 0) { len -= loffset; memmove(start, start + loffset, len); } STR_SET_LEN(str, len); #if !SHARABLE_MIDDLE_SUBSTRING TERM_FILL(start+len, rb_enc_mbminlen(enc)); #endif return str; } return Qnil; } /* * call-seq: * str.strip -> new_str * * Returns a copy of str with leading and trailing whitespace removed. * * Whitespace is defined as any of the following characters: * null, horizontal tab, line feed, vertical tab, form feed, carriage return, space. * * " hello ".strip #=> "hello" * "\tgoodbye\r\n".strip #=> "goodbye" * "\x00\t\n\v\f\r ".strip #=> "" */ static VALUE rb_str_strip(VALUE str) { char *start; long olen, loffset, roffset; rb_encoding *enc = STR_ENC_GET(str); RSTRING_GETMEM(str, start, olen); loffset = lstrip_offset(str, start, start+olen, enc); roffset = rstrip_offset(str, start+loffset, start+olen, enc); if (loffset <= 0 && roffset <= 0) return rb_str_dup(str); return rb_str_subseq(str, loffset, olen-loffset-roffset); } static VALUE scan_once(VALUE str, VALUE pat, long *start, int set_backref_str) { VALUE result, match; struct re_registers *regs; int i; long end, pos = rb_pat_search(pat, str, *start, set_backref_str); if (pos >= 0) { if (BUILTIN_TYPE(pat) == T_STRING) { regs = NULL; end = pos + RSTRING_LEN(pat); } else { match = rb_backref_get(); regs = RMATCH_REGS(match); end = END(0); } if (pos == end) { rb_encoding *enc = STR_ENC_GET(str); /* * Always consume at least one character of the input string */ if (RSTRING_LEN(str) > end) *start = end + rb_enc_fast_mbclen(RSTRING_PTR(str) + end, RSTRING_END(str), enc); else *start = end + 1; } else { *start = end; } if (!regs || regs->num_regs == 1) { result = rb_str_subseq(str, pos, end - pos); OBJ_INFECT(result, pat); return result; } result = rb_ary_new2(regs->num_regs); for (i=1; i < regs->num_regs; i++) { VALUE s = Qnil; if (BEG(i) >= 0) { s = rb_str_subseq(str, BEG(i), END(i)-BEG(i)); OBJ_INFECT(s, pat); } rb_ary_push(result, s); } return result; } return Qnil; } /* * call-seq: * str.scan(pattern) -> array * str.scan(pattern) {|match, ...| block } -> str * * Both forms iterate through str, matching the pattern (which may be a * Regexp or a String). For each match, a result is * generated and either added to the result array or passed to the block. If * the pattern contains no groups, each individual result consists of the * matched string, $&. If the pattern contains groups, each * individual result is itself an array containing one entry per group. * * a = "cruel world" * a.scan(/\w+/) #=> ["cruel", "world"] * a.scan(/.../) #=> ["cru", "el ", "wor"] * a.scan(/(...)/) #=> [["cru"], ["el "], ["wor"]] * a.scan(/(..)(..)/) #=> [["cr", "ue"], ["l ", "wo"]] * * And the block form: * * a.scan(/\w+/) {|w| print "<<#{w}>> " } * print "\n" * a.scan(/(.)(.)/) {|x,y| print y, x } * print "\n" * * produces: * * <> <> * rceu lowlr */ static VALUE rb_str_scan(VALUE str, VALUE pat) { VALUE result; long start = 0; long last = -1, prev = 0; char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str); pat = get_pat_quoted(pat, 1); mustnot_broken(str); if (!rb_block_given_p()) { VALUE ary = rb_ary_new(); while (!NIL_P(result = scan_once(str, pat, &start, 0))) { last = prev; prev = start; rb_ary_push(ary, result); } if (last >= 0) rb_pat_search(pat, str, last, 1); else rb_backref_set(Qnil); return ary; } while (!NIL_P(result = scan_once(str, pat, &start, 1))) { last = prev; prev = start; rb_yield(result); str_mod_check(str, p, len); } if (last >= 0) rb_pat_search(pat, str, last, 1); return str; } /* * call-seq: * str.hex -> integer * * Treats leading characters from str as a string of hexadecimal digits * (with an optional sign and an optional 0x) and returns the * corresponding number. Zero is returned on error. * * "0x0a".hex #=> 10 * "-1234".hex #=> -4660 * "0".hex #=> 0 * "wombat".hex #=> 0 */ static VALUE rb_str_hex(VALUE str) { return rb_str_to_inum(str, 16, FALSE); } /* * call-seq: * str.oct -> integer * * Treats leading characters of str as a string of octal digits (with an * optional sign) and returns the corresponding number. Returns 0 if the * conversion fails. * * "123".oct #=> 83 * "-377".oct #=> -255 * "bad".oct #=> 0 * "0377bad".oct #=> 255 * * If +str+ starts with 0, radix indicators are honored. * See Kernel#Integer. */ static VALUE rb_str_oct(VALUE str) { return rb_str_to_inum(str, -8, FALSE); } /* * call-seq: * str.crypt(salt_str) -> new_str * * Applies a one-way cryptographic hash to str by invoking the * standard library function crypt(3) with the given * salt string. While the format and the result are system and * implementation dependent, using a salt matching the regular * expression \A[a-zA-Z0-9./]{2} should be valid and * safe on any platform, in which only the first two characters are * significant. * * This method is for use in system specific scripts, so if you want * a cross-platform hash function consider using Digest or OpenSSL * instead. */ static VALUE rb_str_crypt(VALUE str, VALUE salt) { #ifdef HAVE_CRYPT_R VALUE databuf; struct crypt_data *data; # define CRYPT_END() ALLOCV_END(databuf) #else extern char *crypt(const char *, const char *); # define CRYPT_END() (void)0 #endif VALUE result; const char *s, *saltp; char *res; #ifdef BROKEN_CRYPT char salt_8bit_clean[3]; #endif StringValue(salt); mustnot_wchar(str); mustnot_wchar(salt); if (RSTRING_LEN(salt) < 2) { short_salt: rb_raise(rb_eArgError, "salt too short (need >=2 bytes)"); } s = StringValueCStr(str); saltp = RSTRING_PTR(salt); if (!saltp[0] || !saltp[1]) goto short_salt; #ifdef BROKEN_CRYPT if (!ISASCII((unsigned char)saltp[0]) || !ISASCII((unsigned char)saltp[1])) { salt_8bit_clean[0] = saltp[0] & 0x7f; salt_8bit_clean[1] = saltp[1] & 0x7f; salt_8bit_clean[2] = '\0'; saltp = salt_8bit_clean; } #endif #ifdef HAVE_CRYPT_R data = ALLOCV(databuf, sizeof(struct crypt_data)); # ifdef HAVE_STRUCT_CRYPT_DATA_INITIALIZED data->initialized = 0; # endif res = crypt_r(s, saltp, data); #else res = crypt(s, saltp); #endif if (!res) { int err = errno; CRYPT_END(); rb_syserr_fail(err, "crypt"); } result = rb_str_new_cstr(res); CRYPT_END(); FL_SET_RAW(result, OBJ_TAINTED_RAW(str) | OBJ_TAINTED_RAW(salt)); return result; } /* * call-seq: * str.ord -> integer * * Return the Integer ordinal of a one-character string. * * "a".ord #=> 97 */ VALUE rb_str_ord(VALUE s) { unsigned int c; c = rb_enc_codepoint(RSTRING_PTR(s), RSTRING_END(s), STR_ENC_GET(s)); return UINT2NUM(c); } /* * call-seq: * str.sum(n=16) -> integer * * Returns a basic n-bit checksum of the characters in str, * where n is the optional Integer parameter, defaulting * to 16. The result is simply the sum of the binary value of each byte in * str modulo 2**n - 1. This is not a particularly good * checksum. */ static VALUE rb_str_sum(int argc, VALUE *argv, VALUE str) { VALUE vbits; int bits; char *ptr, *p, *pend; long len; VALUE sum = INT2FIX(0); unsigned long sum0 = 0; if (argc == 0) { bits = 16; } else { rb_scan_args(argc, argv, "01", &vbits); bits = NUM2INT(vbits); if (bits < 0) bits = 0; } ptr = p = RSTRING_PTR(str); len = RSTRING_LEN(str); pend = p + len; while (p < pend) { if (FIXNUM_MAX - UCHAR_MAX < sum0) { sum = rb_funcall(sum, '+', 1, LONG2FIX(sum0)); str_mod_check(str, ptr, len); sum0 = 0; } sum0 += (unsigned char)*p; p++; } if (bits == 0) { if (sum0) { sum = rb_funcall(sum, '+', 1, LONG2FIX(sum0)); } } else { if (sum == INT2FIX(0)) { if (bits < (int)sizeof(long)*CHAR_BIT) { sum0 &= (((unsigned long)1)<= width) return rb_str_dup(str); n = width - len; llen = (jflag == 'l') ? 0 : ((jflag == 'r') ? n : n/2); rlen = n - llen; cr = ENC_CODERANGE(str); if (flen > 1) { llen2 = str_offset(f, f + flen, llen % fclen, enc, singlebyte); rlen2 = str_offset(f, f + flen, rlen % fclen, enc, singlebyte); } size = RSTRING_LEN(str); if ((len = llen / fclen + rlen / fclen) >= LONG_MAX / flen || (len *= flen) >= LONG_MAX - llen2 - rlen2 || (len += llen2 + rlen2) >= LONG_MAX - size) { rb_raise(rb_eArgError, "argument too big"); } len += size; res = str_new0(rb_obj_class(str), 0, len, termlen); p = RSTRING_PTR(res); if (flen <= 1) { memset(p, *f, llen); p += llen; } else { while (llen >= fclen) { memcpy(p,f,flen); p += flen; llen -= fclen; } if (llen > 0) { memcpy(p, f, llen2); p += llen2; } } memcpy(p, RSTRING_PTR(str), size); p += size; if (flen <= 1) { memset(p, *f, rlen); p += rlen; } else { while (rlen >= fclen) { memcpy(p,f,flen); p += flen; rlen -= fclen; } if (rlen > 0) { memcpy(p, f, rlen2); p += rlen2; } } TERM_FILL(p, termlen); STR_SET_LEN(res, p-RSTRING_PTR(res)); OBJ_INFECT_RAW(res, str); if (!NIL_P(pad)) OBJ_INFECT_RAW(res, pad); rb_enc_associate(res, enc); if (argc == 2) cr = ENC_CODERANGE_AND(cr, ENC_CODERANGE(pad)); if (cr != ENC_CODERANGE_BROKEN) ENC_CODERANGE_SET(res, cr); RB_GC_GUARD(pad); return res; } /* * call-seq: * str.ljust(integer, padstr=' ') -> new_str * * If integer is greater than the length of str, returns a new * String of length integer with str left justified * and padded with padstr; otherwise, returns str. * * "hello".ljust(4) #=> "hello" * "hello".ljust(20) #=> "hello " * "hello".ljust(20, '1234') #=> "hello123412341234123" */ static VALUE rb_str_ljust(int argc, VALUE *argv, VALUE str) { return rb_str_justify(argc, argv, str, 'l'); } /* * call-seq: * str.rjust(integer, padstr=' ') -> new_str * * If integer is greater than the length of str, returns a new * String of length integer with str right justified * and padded with padstr; otherwise, returns str. * * "hello".rjust(4) #=> "hello" * "hello".rjust(20) #=> " hello" * "hello".rjust(20, '1234') #=> "123412341234123hello" */ static VALUE rb_str_rjust(int argc, VALUE *argv, VALUE str) { return rb_str_justify(argc, argv, str, 'r'); } /* * call-seq: * str.center(width, padstr=' ') -> new_str * * Centers +str+ in +width+. If +width+ is greater than the length of +str+, * returns a new String of length +width+ with +str+ centered and padded with * +padstr+; otherwise, returns +str+. * * "hello".center(4) #=> "hello" * "hello".center(20) #=> " hello " * "hello".center(20, '123') #=> "1231231hello12312312" */ static VALUE rb_str_center(int argc, VALUE *argv, VALUE str) { return rb_str_justify(argc, argv, str, 'c'); } /* * call-seq: * str.partition(sep) -> [head, sep, tail] * str.partition(regexp) -> [head, match, tail] * * Searches sep or pattern (regexp) in the string * and returns the part before it, the match, and the part * after it. * If it is not found, returns two empty strings and str. * * "hello".partition("l") #=> ["he", "l", "lo"] * "hello".partition("x") #=> ["hello", "", ""] * "hello".partition(/.l/) #=> ["h", "el", "lo"] */ static VALUE rb_str_partition(VALUE str, VALUE sep) { long pos; sep = get_pat_quoted(sep, 0); if (RB_TYPE_P(sep, T_REGEXP)) { pos = rb_reg_search(sep, str, 0, 0); if (pos < 0) { failed: return rb_ary_new3(3, rb_str_dup(str), str_new_empty(str), str_new_empty(str)); } sep = rb_str_subpat(str, sep, INT2FIX(0)); if (pos == 0 && RSTRING_LEN(sep) == 0) goto failed; } else { pos = rb_str_index(str, sep, 0); if (pos < 0) goto failed; } return rb_ary_new3(3, rb_str_subseq(str, 0, pos), sep, rb_str_subseq(str, pos+RSTRING_LEN(sep), RSTRING_LEN(str)-pos-RSTRING_LEN(sep))); } /* * call-seq: * str.rpartition(sep) -> [head, sep, tail] * str.rpartition(regexp) -> [head, match, tail] * * Searches sep or pattern (regexp) in the string from the end * of the string, and returns the part before it, the match, and the part * after it. * If it is not found, returns two empty strings and str. * * "hello".rpartition("l") #=> ["hel", "l", "o"] * "hello".rpartition("x") #=> ["", "", "hello"] * "hello".rpartition(/.l/) #=> ["he", "ll", "o"] */ static VALUE rb_str_rpartition(VALUE str, VALUE sep) { long pos = RSTRING_LEN(str); int regex = FALSE; if (RB_TYPE_P(sep, T_REGEXP)) { pos = rb_reg_search(sep, str, pos, 1); regex = TRUE; } else { VALUE tmp; tmp = rb_check_string_type(sep); if (NIL_P(tmp)) { rb_raise(rb_eTypeError, "type mismatch: %s given", rb_obj_classname(sep)); } sep = tmp; pos = rb_str_sublen(str, pos); pos = rb_str_rindex(str, sep, pos); } if (pos < 0) { return rb_ary_new3(3, str_new_empty(str), str_new_empty(str), rb_str_dup(str)); } if (regex) { sep = rb_reg_nth_match(0, rb_backref_get()); } else { pos = rb_str_offset(str, pos); } return rb_ary_new3(3, rb_str_subseq(str, 0, pos), sep, rb_str_subseq(str, pos+RSTRING_LEN(sep), RSTRING_LEN(str)-pos-RSTRING_LEN(sep))); } /* * call-seq: * str.start_with?([prefixes]+) -> true or false * * Returns true if +str+ starts with one of the +prefixes+ given. * * "hello".start_with?("hell") #=> true * * # returns true if one of the prefixes matches. * "hello".start_with?("heaven", "hell") #=> true * "hello".start_with?("heaven", "paradise") #=> false */ static VALUE rb_str_start_with(int argc, VALUE *argv, VALUE str) { int i; for (i=0; i true or false * * Returns true if +str+ ends with one of the +suffixes+ given. * * "hello".end_with?("ello") #=> true * * # returns true if one of the +suffixes+ matches. * "hello".end_with?("heaven", "ello") #=> true * "hello".end_with?("heaven", "paradise") #=> false */ static VALUE rb_str_end_with(int argc, VALUE *argv, VALUE str) { int i; char *p, *s, *e; rb_encoding *enc; for (i=0; iprefix to be deleted in the given str, * returning 0 if str does not start with the prefix. * * @param str the target * @param prefix the prefix * @retval 0 if the given str does not start with the given prefix * @retval Positive-Integer otherwise */ static long deleted_prefix_length(VALUE str, VALUE prefix) { char *strptr, *prefixptr; long olen, prefixlen; StringValue(prefix); if (is_broken_string(prefix)) return 0; rb_enc_check(str, prefix); /* return 0 if not start with prefix */ prefixlen = RSTRING_LEN(prefix); if (prefixlen <= 0) return 0; olen = RSTRING_LEN(str); if (olen < prefixlen) return 0; strptr = RSTRING_PTR(str); prefixptr = RSTRING_PTR(prefix); if (memcmp(strptr, prefixptr, prefixlen) != 0) return 0; return prefixlen; } /* * call-seq: * str.delete_prefix!(prefix) -> self or nil * * Deletes leading prefix from str, returning * nil if no change was made. * * "hello".delete_prefix!("hel") #=> "lo" * "hello".delete_prefix!("llo") #=> nil */ static VALUE rb_str_delete_prefix_bang(VALUE str, VALUE prefix) { long prefixlen; str_modify_keep_cr(str); prefixlen = deleted_prefix_length(str, prefix); if (prefixlen <= 0) return Qnil; return rb_str_drop_bytes(str, prefixlen); } /* * call-seq: * str.delete_prefix(prefix) -> new_str * * Returns a copy of str with leading prefix deleted. * * "hello".delete_prefix("hel") #=> "lo" * "hello".delete_prefix("llo") #=> "hello" */ static VALUE rb_str_delete_prefix(VALUE str, VALUE prefix) { long prefixlen; prefixlen = deleted_prefix_length(str, prefix); if (prefixlen <= 0) return rb_str_dup(str); return rb_str_subseq(str, prefixlen, RSTRING_LEN(str) - prefixlen); } /*! * Returns the length of the suffix to be deleted in the given str, * returning 0 if str does not end with the suffix. * * @param str the target * @param suffix the suffix * @retval 0 if the given str does not end with the given suffix * @retval Positive-Integer otherwise */ static long deleted_suffix_length(VALUE str, VALUE suffix) { char *strptr, *suffixptr, *s; long olen, suffixlen; rb_encoding *enc; StringValue(suffix); if (is_broken_string(suffix)) return 0; enc = rb_enc_check(str, suffix); /* return 0 if not start with suffix */ suffixlen = RSTRING_LEN(suffix); if (suffixlen <= 0) return 0; olen = RSTRING_LEN(str); if (olen < suffixlen) return 0; strptr = RSTRING_PTR(str); suffixptr = RSTRING_PTR(suffix); s = strptr + olen - suffixlen; if (memcmp(s, suffixptr, suffixlen) != 0) return 0; if (rb_enc_left_char_head(strptr, s, strptr + olen, enc) != s) return 0; return suffixlen; } /* * call-seq: * str.delete_suffix!(suffix) -> self or nil * * Deletes trailing suffix from str, returning * nil if no change was made. * * "hello".delete_suffix!("llo") #=> "he" * "hello".delete_suffix!("hel") #=> nil */ static VALUE rb_str_delete_suffix_bang(VALUE str, VALUE suffix) { long olen, suffixlen, len; str_modifiable(str); suffixlen = deleted_suffix_length(str, suffix); if (suffixlen <= 0) return Qnil; olen = RSTRING_LEN(str); str_modify_keep_cr(str); len = olen - suffixlen; STR_SET_LEN(str, len); TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str)); if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) { ENC_CODERANGE_CLEAR(str); } return str; } /* * call-seq: * str.delete_suffix(suffix) -> new_str * * Returns a copy of str with trailing suffix deleted. * * "hello".delete_suffix("llo") #=> "he" * "hello".delete_suffix("hel") #=> "hello" */ static VALUE rb_str_delete_suffix(VALUE str, VALUE suffix) { long suffixlen; suffixlen = deleted_suffix_length(str, suffix); if (suffixlen <= 0) return rb_str_dup(str); return rb_str_subseq(str, 0, RSTRING_LEN(str) - suffixlen); } void rb_str_setter(VALUE val, ID id, VALUE *var) { if (!NIL_P(val) && !RB_TYPE_P(val, T_STRING)) { rb_raise(rb_eTypeError, "value of %"PRIsVALUE" must be String", rb_id2str(id)); } *var = val; } static void rb_fs_setter(VALUE val, ID id, VALUE *var) { val = rb_fs_check(val); if (!val) { rb_raise(rb_eTypeError, "value of %"PRIsVALUE" must be String or Regexp", rb_id2str(id)); } *var = val; } /* * call-seq: * str.force_encoding(encoding) -> str * * Changes the encoding to +encoding+ and returns self. */ static VALUE rb_str_force_encoding(VALUE str, VALUE enc) { str_modifiable(str); rb_enc_associate(str, rb_to_encoding(enc)); ENC_CODERANGE_CLEAR(str); return str; } /* * call-seq: * str.b -> str * * Returns a copied string whose encoding is ASCII-8BIT. */ static VALUE rb_str_b(VALUE str) { VALUE str2 = str_alloc(rb_cString); str_replace_shared_without_enc(str2, str); OBJ_INFECT_RAW(str2, str); ENC_CODERANGE_CLEAR(str2); return str2; } /* * call-seq: * str.valid_encoding? -> true or false * * Returns true for a string which is encoded correctly. * * "\xc2\xa1".force_encoding("UTF-8").valid_encoding? #=> true * "\xc2".force_encoding("UTF-8").valid_encoding? #=> false * "\x80".force_encoding("UTF-8").valid_encoding? #=> false */ static VALUE rb_str_valid_encoding_p(VALUE str) { int cr = rb_enc_str_coderange(str); return cr == ENC_CODERANGE_BROKEN ? Qfalse : Qtrue; } /* * call-seq: * str.ascii_only? -> true or false * * Returns true for a string which has only ASCII characters. * * "abc".force_encoding("UTF-8").ascii_only? #=> true * "abc\u{6666}".force_encoding("UTF-8").ascii_only? #=> false */ static VALUE rb_str_is_ascii_only_p(VALUE str) { int cr = rb_enc_str_coderange(str); return cr == ENC_CODERANGE_7BIT ? Qtrue : Qfalse; } /** * Shortens _str_ and adds three dots, an ellipsis, if it is longer * than _len_ characters. * * \param str the string to ellipsize. * \param len the maximum string length. * \return the ellipsized string. * \pre _len_ must not be negative. * \post the length of the returned string in characters is less than or equal to _len_. * \post If the length of _str_ is less than or equal _len_, returns _str_ itself. * \post the encoding of returned string is equal to the encoding of _str_. * \post the class of returned string is equal to the class of _str_. * \note the length is counted in characters. */ VALUE rb_str_ellipsize(VALUE str, long len) { static const char ellipsis[] = "..."; const long ellipsislen = sizeof(ellipsis) - 1; rb_encoding *const enc = rb_enc_get(str); const long blen = RSTRING_LEN(str); const char *const p = RSTRING_PTR(str), *e = p + blen; VALUE estr, ret = 0; if (len < 0) rb_raise(rb_eIndexError, "negative length %ld", len); if (len * rb_enc_mbminlen(enc) >= blen || (e = rb_enc_nth(p, e, len, enc)) - p == blen) { ret = str; } else if (len <= ellipsislen || !(e = rb_enc_step_back(p, e, e, len = ellipsislen, enc))) { if (rb_enc_asciicompat(enc)) { ret = rb_str_new_with_class(str, ellipsis, len); rb_enc_associate(ret, enc); } else { estr = rb_usascii_str_new(ellipsis, len); ret = rb_str_encode(estr, rb_enc_from_encoding(enc), 0, Qnil); } } else if (ret = rb_str_subseq(str, 0, e - p), rb_enc_asciicompat(enc)) { rb_str_cat(ret, ellipsis, ellipsislen); } else { estr = rb_str_encode(rb_usascii_str_new(ellipsis, ellipsislen), rb_enc_from_encoding(enc), 0, Qnil); rb_str_append(ret, estr); } return ret; } static VALUE str_compat_and_valid(VALUE str, rb_encoding *enc) { int cr; str = StringValue(str); cr = rb_enc_str_coderange(str); if (cr == ENC_CODERANGE_BROKEN) { rb_raise(rb_eArgError, "replacement must be valid byte sequence '%+"PRIsVALUE"'", str); } else { rb_encoding *e = STR_ENC_GET(str); if (cr == ENC_CODERANGE_7BIT ? rb_enc_mbminlen(enc) != 1 : enc != e) { rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s", rb_enc_name(enc), rb_enc_name(e)); } } return str; } static VALUE enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl, int cr); /** * @param str the string to be scrubbed * @param repl the replacement character * @return If given string is invalid, returns a new string. Otherwise, returns Qnil. */ VALUE rb_str_scrub(VALUE str, VALUE repl) { rb_encoding *enc = STR_ENC_GET(str); return enc_str_scrub(enc, str, repl, ENC_CODERANGE(str)); } VALUE rb_enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl) { int cr = ENC_CODERANGE_UNKNOWN; if (enc == STR_ENC_GET(str)) { /* cached coderange makes sense only when enc equals the * actual encoding of str */ cr = ENC_CODERANGE(str); } return enc_str_scrub(enc, str, repl, cr); } static VALUE enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl, int cr) { int encidx; VALUE buf = Qnil; const char *rep; long replen = -1; int tainted = 0; if (rb_block_given_p()) { if (!NIL_P(repl)) rb_raise(rb_eArgError, "both of block and replacement given"); replen = 0; } if (ENC_CODERANGE_CLEAN_P(cr)) return Qnil; if (!NIL_P(repl)) { repl = str_compat_and_valid(repl, enc); tainted = OBJ_TAINTED_RAW(repl); } if (rb_enc_dummy_p(enc)) { return Qnil; } encidx = rb_enc_to_index(enc); #define DEFAULT_REPLACE_CHAR(str) do { \ static const char replace[sizeof(str)-1] = str; \ rep = replace; replen = (int)sizeof(replace); \ } while (0) if (rb_enc_asciicompat(enc)) { const char *p = RSTRING_PTR(str); const char *e = RSTRING_END(str); const char *p1 = p; int rep7bit_p; if (!replen) { rep = NULL; rep7bit_p = FALSE; } else if (!NIL_P(repl)) { rep = RSTRING_PTR(repl); replen = RSTRING_LEN(repl); rep7bit_p = (ENC_CODERANGE(repl) == ENC_CODERANGE_7BIT); } else if (encidx == rb_utf8_encindex()) { DEFAULT_REPLACE_CHAR("\xEF\xBF\xBD"); rep7bit_p = FALSE; } else { DEFAULT_REPLACE_CHAR("?"); rep7bit_p = TRUE; } cr = ENC_CODERANGE_7BIT; p = search_nonascii(p, e); if (!p) { p = e; } while (p < e) { int ret = rb_enc_precise_mbclen(p, e, enc); if (MBCLEN_NEEDMORE_P(ret)) { break; } else if (MBCLEN_CHARFOUND_P(ret)) { cr = ENC_CODERANGE_VALID; p += MBCLEN_CHARFOUND_LEN(ret); } else if (MBCLEN_INVALID_P(ret)) { /* * p1~p: valid ascii/multibyte chars * p ~e: invalid bytes + unknown bytes */ long clen = rb_enc_mbmaxlen(enc); if (NIL_P(buf)) buf = rb_str_buf_new(RSTRING_LEN(str)); if (p > p1) { rb_str_buf_cat(buf, p1, p - p1); } if (e - p < clen) clen = e - p; if (clen <= 2) { clen = 1; } else { const char *q = p; clen--; for (; clen > 1; clen--) { ret = rb_enc_precise_mbclen(q, q + clen, enc); if (MBCLEN_NEEDMORE_P(ret)) break; if (MBCLEN_INVALID_P(ret)) continue; UNREACHABLE; } } if (rep) { rb_str_buf_cat(buf, rep, replen); if (!rep7bit_p) cr = ENC_CODERANGE_VALID; } else { repl = rb_yield(rb_enc_str_new(p, clen, enc)); repl = str_compat_and_valid(repl, enc); tainted |= OBJ_TAINTED_RAW(repl); rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl)); if (ENC_CODERANGE(repl) == ENC_CODERANGE_VALID) cr = ENC_CODERANGE_VALID; } p += clen; p1 = p; p = search_nonascii(p, e); if (!p) { p = e; break; } } else { UNREACHABLE; } } if (NIL_P(buf)) { if (p == e) { ENC_CODERANGE_SET(str, cr); return Qnil; } buf = rb_str_buf_new(RSTRING_LEN(str)); } if (p1 < p) { rb_str_buf_cat(buf, p1, p - p1); } if (p < e) { if (rep) { rb_str_buf_cat(buf, rep, replen); if (!rep7bit_p) cr = ENC_CODERANGE_VALID; } else { repl = rb_yield(rb_enc_str_new(p, e-p, enc)); repl = str_compat_and_valid(repl, enc); tainted |= OBJ_TAINTED_RAW(repl); rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl)); if (ENC_CODERANGE(repl) == ENC_CODERANGE_VALID) cr = ENC_CODERANGE_VALID; } } } else { /* ASCII incompatible */ const char *p = RSTRING_PTR(str); const char *e = RSTRING_END(str); const char *p1 = p; long mbminlen = rb_enc_mbminlen(enc); if (!replen) { rep = NULL; } else if (!NIL_P(repl)) { rep = RSTRING_PTR(repl); replen = RSTRING_LEN(repl); } else if (encidx == ENCINDEX_UTF_16BE) { DEFAULT_REPLACE_CHAR("\xFF\xFD"); } else if (encidx == ENCINDEX_UTF_16LE) { DEFAULT_REPLACE_CHAR("\xFD\xFF"); } else if (encidx == ENCINDEX_UTF_32BE) { DEFAULT_REPLACE_CHAR("\x00\x00\xFF\xFD"); } else if (encidx == ENCINDEX_UTF_32LE) { DEFAULT_REPLACE_CHAR("\xFD\xFF\x00\x00"); } else { DEFAULT_REPLACE_CHAR("?"); } while (p < e) { int ret = rb_enc_precise_mbclen(p, e, enc); if (MBCLEN_NEEDMORE_P(ret)) { break; } else if (MBCLEN_CHARFOUND_P(ret)) { p += MBCLEN_CHARFOUND_LEN(ret); } else if (MBCLEN_INVALID_P(ret)) { const char *q = p; long clen = rb_enc_mbmaxlen(enc); if (NIL_P(buf)) buf = rb_str_buf_new(RSTRING_LEN(str)); if (p > p1) rb_str_buf_cat(buf, p1, p - p1); if (e - p < clen) clen = e - p; if (clen <= mbminlen * 2) { clen = mbminlen; } else { clen -= mbminlen; for (; clen > mbminlen; clen-=mbminlen) { ret = rb_enc_precise_mbclen(q, q + clen, enc); if (MBCLEN_NEEDMORE_P(ret)) break; if (MBCLEN_INVALID_P(ret)) continue; UNREACHABLE; } } if (rep) { rb_str_buf_cat(buf, rep, replen); } else { repl = rb_yield(rb_enc_str_new(p, clen, enc)); repl = str_compat_and_valid(repl, enc); tainted |= OBJ_TAINTED_RAW(repl); rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl)); } p += clen; p1 = p; } else { UNREACHABLE; } } if (NIL_P(buf)) { if (p == e) { ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID); return Qnil; } buf = rb_str_buf_new(RSTRING_LEN(str)); } if (p1 < p) { rb_str_buf_cat(buf, p1, p - p1); } if (p < e) { if (rep) { rb_str_buf_cat(buf, rep, replen); } else { repl = rb_yield(rb_enc_str_new(p, e-p, enc)); repl = str_compat_and_valid(repl, enc); tainted |= OBJ_TAINTED_RAW(repl); rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl)); } } cr = ENC_CODERANGE_VALID; } FL_SET_RAW(buf, tainted|OBJ_TAINTED_RAW(str)); ENCODING_CODERANGE_SET(buf, rb_enc_to_index(enc), cr); return buf; } /* * call-seq: * str.scrub -> new_str * str.scrub(repl) -> new_str * str.scrub{|bytes|} -> new_str * * If the string is invalid byte sequence then replace invalid bytes with given replacement * character, else returns self. * If block is given, replace invalid bytes with returned value of the block. * * "abc\u3042\x81".scrub #=> "abc\u3042\uFFFD" * "abc\u3042\x81".scrub("*") #=> "abc\u3042*" * "abc\u3042\xE3\x80".scrub{|bytes| '<'+bytes.unpack('H*')[0]+'>' } #=> "abc\u3042" */ static VALUE str_scrub(int argc, VALUE *argv, VALUE str) { VALUE repl = argc ? (rb_check_arity(argc, 0, 1), argv[0]) : Qnil; VALUE new = rb_str_scrub(str, repl); return NIL_P(new) ? rb_str_dup(str): new; } /* * call-seq: * str.scrub! -> str * str.scrub!(repl) -> str * str.scrub!{|bytes|} -> str * * If the string is invalid byte sequence then replace invalid bytes with given replacement * character, else returns self. * If block is given, replace invalid bytes with returned value of the block. * * "abc\u3042\x81".scrub! #=> "abc\u3042\uFFFD" * "abc\u3042\x81".scrub!("*") #=> "abc\u3042*" * "abc\u3042\xE3\x80".scrub!{|bytes| '<'+bytes.unpack('H*')[0]+'>' } #=> "abc\u3042" */ static VALUE str_scrub_bang(int argc, VALUE *argv, VALUE str) { VALUE repl = argc ? (rb_check_arity(argc, 0, 1), argv[0]) : Qnil; VALUE new = rb_str_scrub(str, repl); if (!NIL_P(new)) rb_str_replace(str, new); return str; } static ID id_normalize; static ID id_normalized_p; static VALUE mUnicodeNormalize; static VALUE unicode_normalize_common(int argc, VALUE *argv, VALUE str, ID id) { static int UnicodeNormalizeRequired = 0; VALUE argv2[2]; if (!UnicodeNormalizeRequired) { rb_require("unicode_normalize/normalize.rb"); UnicodeNormalizeRequired = 1; } argv2[0] = str; rb_scan_args(argc, argv, "01", &argv2[1]); return rb_funcallv(mUnicodeNormalize, id, argc+1, argv2); } /* * call-seq: * str.unicode_normalize(form=:nfc) * * Unicode Normalization---Returns a normalized form of +str+, * using Unicode normalizations NFC, NFD, NFKC, or NFKD. * The normalization form used is determined by +form+, which can * be any of the four values +:nfc+, +:nfd+, +:nfkc+, or +:nfkd+. * The default is +:nfc+. * * If the string is not in a Unicode Encoding, then an Exception is raised. * In this context, 'Unicode Encoding' means any of UTF-8, UTF-16BE/LE, * and UTF-32BE/LE, as well as GB18030, UCS_2BE, and UCS_4BE. * Anything other than UTF-8 is implemented by converting to UTF-8, * which makes it slower than UTF-8. * * "a\u0300".unicode_normalize #=> "\u00E0" * "a\u0300".unicode_normalize(:nfc) #=> "\u00E0" * "\u00E0".unicode_normalize(:nfd) #=> "a\u0300" * "\xE0".force_encoding('ISO-8859-1').unicode_normalize(:nfd) * #=> Encoding::CompatibilityError raised */ static VALUE rb_str_unicode_normalize(int argc, VALUE *argv, VALUE str) { return unicode_normalize_common(argc, argv, str, id_normalize); } /* * call-seq: * str.unicode_normalize!(form=:nfc) * * Destructive version of String#unicode_normalize, doing Unicode * normalization in place. */ static VALUE rb_str_unicode_normalize_bang(int argc, VALUE *argv, VALUE str) { return rb_str_replace(str, unicode_normalize_common(argc, argv, str, id_normalize)); } /* call-seq: * str.unicode_normalized?(form=:nfc) * * Checks whether +str+ is in Unicode normalization form +form+, * which can be any of the four values +:nfc+, +:nfd+, +:nfkc+, or +:nfkd+. * The default is +:nfc+. * * If the string is not in a Unicode Encoding, then an Exception is raised. * For details, see String#unicode_normalize. * * "a\u0300".unicode_normalized? #=> false * "a\u0300".unicode_normalized?(:nfd) #=> true * "\u00E0".unicode_normalized? #=> true * "\u00E0".unicode_normalized?(:nfd) #=> false * "\xE0".force_encoding('ISO-8859-1').unicode_normalized? * #=> Encoding::CompatibilityError raised */ static VALUE rb_str_unicode_normalized_p(int argc, VALUE *argv, VALUE str) { return unicode_normalize_common(argc, argv, str, id_normalized_p); } /********************************************************************** * Document-class: Symbol * * Symbol objects represent names and some strings * inside the Ruby * interpreter. They are generated using the :name and * :"string" literals * syntax, and by the various to_sym methods. The same * Symbol object will be created for a given name or string * for the duration of a program's execution, regardless of the context * or meaning of that name. Thus if Fred is a constant in * one context, a method in another, and a class in a third, the * Symbol :Fred will be the same object in * all three contexts. * * module One * class Fred * end * $f1 = :Fred * end * module Two * Fred = 1 * $f2 = :Fred * end * def Fred() * end * $f3 = :Fred * $f1.object_id #=> 2514190 * $f2.object_id #=> 2514190 * $f3.object_id #=> 2514190 * */ /* * call-seq: * sym == obj -> true or false * * Equality---If sym and obj are exactly the same * symbol, returns true. */ #define sym_equal rb_obj_equal static int sym_printable(const char *s, const char *send, rb_encoding *enc) { while (s < send) { int n; int c = rb_enc_precise_mbclen(s, send, enc); if (!MBCLEN_CHARFOUND_P(c)) return FALSE; n = MBCLEN_CHARFOUND_LEN(c); c = rb_enc_mbc_to_codepoint(s, send, enc); if (!rb_enc_isprint(c, enc)) return FALSE; s += n; } return TRUE; } int rb_str_symname_p(VALUE sym) { rb_encoding *enc; const char *ptr; long len; rb_encoding *resenc = rb_default_internal_encoding(); if (resenc == NULL) resenc = rb_default_external_encoding(); enc = STR_ENC_GET(sym); ptr = RSTRING_PTR(sym); len = RSTRING_LEN(sym); if ((resenc != enc && !rb_str_is_ascii_only_p(sym)) || len != (long)strlen(ptr) || !rb_enc_symname_p(ptr, enc) || !sym_printable(ptr, ptr + len, enc)) { return FALSE; } return TRUE; } VALUE rb_str_quote_unprintable(VALUE str) { rb_encoding *enc; const char *ptr; long len; rb_encoding *resenc; Check_Type(str, T_STRING); resenc = rb_default_internal_encoding(); if (resenc == NULL) resenc = rb_default_external_encoding(); enc = STR_ENC_GET(str); ptr = RSTRING_PTR(str); len = RSTRING_LEN(str); if ((resenc != enc && !rb_str_is_ascii_only_p(str)) || !sym_printable(ptr, ptr + len, enc)) { return rb_str_inspect(str); } return str; } VALUE rb_id_quote_unprintable(ID id) { return rb_str_quote_unprintable(rb_id2str(id)); } /* * call-seq: * sym.inspect -> string * * Returns the representation of sym as a symbol literal. * * :fred.inspect #=> ":fred" */ static VALUE sym_inspect(VALUE sym) { VALUE str = rb_sym2str(sym); const char *ptr; long len; char *dest; if (!rb_str_symname_p(str)) { str = rb_str_inspect(str); len = RSTRING_LEN(str); rb_str_resize(str, len + 1); dest = RSTRING_PTR(str); memmove(dest + 1, dest, len); } else { rb_encoding *enc = STR_ENC_GET(str); RSTRING_GETMEM(str, ptr, len); str = rb_enc_str_new(0, len + 1, enc); dest = RSTRING_PTR(str); memcpy(dest + 1, ptr, len); } dest[0] = ':'; return str; } /* * call-seq: * sym.id2name -> string * sym.to_s -> string * * Returns the name or string corresponding to sym. * * :fred.id2name #=> "fred" * :ginger.to_s #=> "ginger" */ VALUE rb_sym_to_s(VALUE sym) { return str_new_shared(rb_cString, rb_sym2str(sym)); } /* * call-seq: * sym.to_sym -> sym * sym.intern -> sym * * In general, to_sym returns the Symbol corresponding * to an object. As sym is already a symbol, self is returned * in this case. */ static VALUE sym_to_sym(VALUE sym) { return sym; } VALUE rb_sym_proc_call(ID mid, int argc, const VALUE *argv, VALUE passed_proc) { VALUE obj; if (argc < 1) { rb_raise(rb_eArgError, "no receiver given"); } obj = argv[0]; return rb_funcall_with_block(obj, mid, argc - 1, argv + 1, passed_proc); } #if 0 /* * call-seq: * sym.to_proc * * Returns a _Proc_ object which responds to the given method by _sym_. * * (1..3).collect(&:to_s) #=> ["1", "2", "3"] */ VALUE rb_sym_to_proc(VALUE sym) { } #endif /* * call-seq: * * sym.succ * * Same as sym.to_s.succ.intern. */ static VALUE sym_succ(VALUE sym) { return rb_str_intern(rb_str_succ(rb_sym2str(sym))); } /* * call-seq: * * symbol <=> other_symbol -> -1, 0, +1, or nil * * Compares +symbol+ with +other_symbol+ after calling #to_s on each of the * symbols. Returns -1, 0, +1, or +nil+ depending on whether +symbol+ is * less than, equal to, or greater than +other_symbol+. * * +nil+ is returned if the two values are incomparable. * * See String#<=> for more information. */ static VALUE sym_cmp(VALUE sym, VALUE other) { if (!SYMBOL_P(other)) { return Qnil; } return rb_str_cmp_m(rb_sym2str(sym), rb_sym2str(other)); } /* * call-seq: * sym.casecmp(other_symbol) -> -1, 0, +1, or nil * * Case-insensitive version of Symbol#<=>. * Currently, case-insensitivity only works on characters A-Z/a-z, * not all of Unicode. This is different from Symbol#casecmp?. * * :aBcDeF.casecmp(:abcde) #=> 1 * :aBcDeF.casecmp(:abcdef) #=> 0 * :aBcDeF.casecmp(:abcdefg) #=> -1 * :abcdef.casecmp(:ABCDEF) #=> 0 * * +nil+ is returned if the two symbols have incompatible encodings, * or if +other_symbol+ is not a symbol. * * :foo.casecmp(2) #=> nil * "\u{e4 f6 fc}".encode("ISO-8859-1").to_sym.casecmp(:"\u{c4 d6 dc}") #=> nil */ static VALUE sym_casecmp(VALUE sym, VALUE other) { if (!SYMBOL_P(other)) { return Qnil; } return str_casecmp(rb_sym2str(sym), rb_sym2str(other)); } /* * call-seq: * sym.casecmp?(other_symbol) -> true, false, or nil * * Returns +true+ if +sym+ and +other_symbol+ are equal after * Unicode case folding, +false+ if they are not equal. * * :aBcDeF.casecmp?(:abcde) #=> false * :aBcDeF.casecmp?(:abcdef) #=> true * :aBcDeF.casecmp?(:abcdefg) #=> false * :abcdef.casecmp?(:ABCDEF) #=> true * :"\u{e4 f6 fc}".casecmp?(:"\u{c4 d6 dc}") #=> true * * +nil+ is returned if the two symbols have incompatible encodings, * or if +other_symbol+ is not a symbol. * * :foo.casecmp?(2) #=> nil * "\u{e4 f6 fc}".encode("ISO-8859-1").to_sym.casecmp?(:"\u{c4 d6 dc}") #=> nil */ static VALUE sym_casecmp_p(VALUE sym, VALUE other) { if (!SYMBOL_P(other)) { return Qnil; } return str_casecmp_p(rb_sym2str(sym), rb_sym2str(other)); } /* * call-seq: * sym =~ obj -> integer or nil * * Returns sym.to_s =~ obj. */ static VALUE sym_match(VALUE sym, VALUE other) { return rb_str_match(rb_sym2str(sym), other); } /* * call-seq: * sym.match(pattern) -> matchdata or nil * sym.match(pattern, pos) -> matchdata or nil * * Returns sym.to_s.match. */ static VALUE sym_match_m(int argc, VALUE *argv, VALUE sym) { return rb_str_match_m(argc, argv, rb_sym2str(sym)); } /* * call-seq: * sym.match?(pattern) -> true or false * sym.match?(pattern, pos) -> true or false * * Returns sym.to_s.match?. */ static VALUE sym_match_m_p(int argc, VALUE *argv, VALUE sym) { return rb_str_match_m_p(argc, argv, sym); } /* * call-seq: * sym[idx] -> char * sym[b, n] -> string * sym.slice(idx) -> char * sym.slice(b, n) -> string * * Returns sym.to_s[]. */ static VALUE sym_aref(int argc, VALUE *argv, VALUE sym) { return rb_str_aref_m(argc, argv, rb_sym2str(sym)); } /* * call-seq: * sym.length -> integer * sym.size -> integer * * Same as sym.to_s.length. */ static VALUE sym_length(VALUE sym) { return rb_str_length(rb_sym2str(sym)); } /* * call-seq: * sym.empty? -> true or false * * Returns whether _sym_ is :"" or not. */ static VALUE sym_empty(VALUE sym) { return rb_str_empty(rb_sym2str(sym)); } /* * call-seq: * sym.upcase -> symbol * sym.upcase([options]) -> symbol * * Same as sym.to_s.upcase.intern. */ static VALUE sym_upcase(int argc, VALUE *argv, VALUE sym) { return rb_str_intern(rb_str_upcase(argc, argv, rb_sym2str(sym))); } /* * call-seq: * sym.downcase -> symbol * sym.downcase([options]) -> symbol * * Same as sym.to_s.downcase.intern. */ static VALUE sym_downcase(int argc, VALUE *argv, VALUE sym) { return rb_str_intern(rb_str_downcase(argc, argv, rb_sym2str(sym))); } /* * call-seq: * sym.capitalize -> symbol * sym.capitalize([options]) -> symbol * * Same as sym.to_s.capitalize.intern. */ static VALUE sym_capitalize(int argc, VALUE *argv, VALUE sym) { return rb_str_intern(rb_str_capitalize(argc, argv, rb_sym2str(sym))); } /* * call-seq: * sym.swapcase -> symbol * sym.swapcase([options]) -> symbol * * Same as sym.to_s.swapcase.intern. */ static VALUE sym_swapcase(int argc, VALUE *argv, VALUE sym) { return rb_str_intern(rb_str_swapcase(argc, argv, rb_sym2str(sym))); } /* * call-seq: * sym.encoding -> encoding * * Returns the Encoding object that represents the encoding of _sym_. */ static VALUE sym_encoding(VALUE sym) { return rb_obj_encoding(rb_sym2str(sym)); } static VALUE string_for_symbol(VALUE name) { if (!RB_TYPE_P(name, T_STRING)) { VALUE tmp = rb_check_string_type(name); if (NIL_P(tmp)) { rb_raise(rb_eTypeError, "%+"PRIsVALUE" is not a symbol", name); } name = tmp; } return name; } ID rb_to_id(VALUE name) { if (SYMBOL_P(name)) { return SYM2ID(name); } name = string_for_symbol(name); return rb_intern_str(name); } VALUE rb_to_symbol(VALUE name) { if (SYMBOL_P(name)) { return name; } name = string_for_symbol(name); return rb_str_intern(name); } /* * A String object holds and manipulates an arbitrary sequence of * bytes, typically representing characters. String objects may be created * using String::new or as literals. * * Because of aliasing issues, users of strings should be aware of the methods * that modify the contents of a String object. Typically, * methods with names ending in ``!'' modify their receiver, while those * without a ``!'' return a new String. However, there are * exceptions, such as String#[]=. * */ void Init_String(void) { #undef rb_intern #define rb_intern(str) rb_intern_const(str) rb_cString = rb_define_class("String", rb_cObject); assert(rb_vm_fstring_table()); st_foreach(rb_vm_fstring_table(), fstring_set_class_i, rb_cString); rb_include_module(rb_cString, rb_mComparable); rb_define_alloc_func(rb_cString, empty_str_alloc); rb_define_singleton_method(rb_cString, "try_convert", rb_str_s_try_convert, 1); rb_define_method(rb_cString, "initialize", rb_str_init, -1); rb_define_method(rb_cString, "initialize_copy", rb_str_replace, 1); rb_define_method(rb_cString, "<=>", rb_str_cmp_m, 1); rb_define_method(rb_cString, "==", rb_str_equal, 1); rb_define_method(rb_cString, "===", rb_str_equal, 1); rb_define_method(rb_cString, "eql?", rb_str_eql, 1); rb_define_method(rb_cString, "hash", rb_str_hash_m, 0); rb_define_method(rb_cString, "casecmp", rb_str_casecmp, 1); rb_define_method(rb_cString, "casecmp?", rb_str_casecmp_p, 1); rb_define_method(rb_cString, "+", rb_str_plus, 1); rb_define_method(rb_cString, "*", rb_str_times, 1); rb_define_method(rb_cString, "%", rb_str_format_m, 1); rb_define_method(rb_cString, "[]", rb_str_aref_m, -1); rb_define_method(rb_cString, "[]=", rb_str_aset_m, -1); rb_define_method(rb_cString, "insert", rb_str_insert, 2); rb_define_method(rb_cString, "length", rb_str_length, 0); rb_define_method(rb_cString, "size", rb_str_length, 0); rb_define_method(rb_cString, "bytesize", rb_str_bytesize, 0); rb_define_method(rb_cString, "empty?", rb_str_empty, 0); rb_define_method(rb_cString, "=~", rb_str_match, 1); rb_define_method(rb_cString, "match", rb_str_match_m, -1); rb_define_method(rb_cString, "match?", rb_str_match_m_p, -1); rb_define_method(rb_cString, "succ", rb_str_succ, 0); rb_define_method(rb_cString, "succ!", rb_str_succ_bang, 0); rb_define_method(rb_cString, "next", rb_str_succ, 0); rb_define_method(rb_cString, "next!", rb_str_succ_bang, 0); rb_define_method(rb_cString, "upto", rb_str_upto, -1); rb_define_method(rb_cString, "index", rb_str_index_m, -1); rb_define_method(rb_cString, "rindex", rb_str_rindex_m, -1); rb_define_method(rb_cString, "replace", rb_str_replace, 1); rb_define_method(rb_cString, "clear", rb_str_clear, 0); rb_define_method(rb_cString, "chr", rb_str_chr, 0); rb_define_method(rb_cString, "getbyte", rb_str_getbyte, 1); rb_define_method(rb_cString, "setbyte", rb_str_setbyte, 2); rb_define_method(rb_cString, "byteslice", rb_str_byteslice, -1); rb_define_method(rb_cString, "scrub", str_scrub, -1); rb_define_method(rb_cString, "scrub!", str_scrub_bang, -1); rb_define_method(rb_cString, "freeze", rb_str_freeze, 0); rb_define_method(rb_cString, "+@", str_uplus, 0); rb_define_method(rb_cString, "-@", str_uminus, 0); rb_define_method(rb_cString, "to_i", rb_str_to_i, -1); rb_define_method(rb_cString, "to_f", rb_str_to_f, 0); rb_define_method(rb_cString, "to_s", rb_str_to_s, 0); rb_define_method(rb_cString, "to_str", rb_str_to_s, 0); rb_define_method(rb_cString, "inspect", rb_str_inspect, 0); rb_define_method(rb_cString, "dump", rb_str_dump, 0); rb_define_method(rb_cString, "undump", str_undump, 0); sym_ascii = ID2SYM(rb_intern("ascii")); sym_turkic = ID2SYM(rb_intern("turkic")); sym_lithuanian = ID2SYM(rb_intern("lithuanian")); sym_fold = ID2SYM(rb_intern("fold")); rb_define_method(rb_cString, "upcase", rb_str_upcase, -1); rb_define_method(rb_cString, "downcase", rb_str_downcase, -1); rb_define_method(rb_cString, "capitalize", rb_str_capitalize, -1); rb_define_method(rb_cString, "swapcase", rb_str_swapcase, -1); rb_define_method(rb_cString, "upcase!", rb_str_upcase_bang, -1); rb_define_method(rb_cString, "downcase!", rb_str_downcase_bang, -1); rb_define_method(rb_cString, "capitalize!", rb_str_capitalize_bang, -1); rb_define_method(rb_cString, "swapcase!", rb_str_swapcase_bang, -1); rb_define_method(rb_cString, "hex", rb_str_hex, 0); rb_define_method(rb_cString, "oct", rb_str_oct, 0); rb_define_method(rb_cString, "split", rb_str_split_m, -1); rb_define_method(rb_cString, "lines", rb_str_lines, -1); rb_define_method(rb_cString, "bytes", rb_str_bytes, 0); rb_define_method(rb_cString, "chars", rb_str_chars, 0); rb_define_method(rb_cString, "codepoints", rb_str_codepoints, 0); rb_define_method(rb_cString, "grapheme_clusters", rb_str_grapheme_clusters, 0); rb_define_method(rb_cString, "reverse", rb_str_reverse, 0); rb_define_method(rb_cString, "reverse!", rb_str_reverse_bang, 0); rb_define_method(rb_cString, "concat", rb_str_concat_multi, -1); rb_define_method(rb_cString, "<<", rb_str_concat, 1); rb_define_method(rb_cString, "prepend", rb_str_prepend_multi, -1); rb_define_method(rb_cString, "crypt", rb_str_crypt, 1); rb_define_method(rb_cString, "intern", rb_str_intern, 0); /* in symbol.c */ rb_define_method(rb_cString, "to_sym", rb_str_intern, 0); /* in symbol.c */ rb_define_method(rb_cString, "ord", rb_str_ord, 0); rb_define_method(rb_cString, "include?", rb_str_include, 1); rb_define_method(rb_cString, "start_with?", rb_str_start_with, -1); rb_define_method(rb_cString, "end_with?", rb_str_end_with, -1); rb_define_method(rb_cString, "scan", rb_str_scan, 1); rb_define_method(rb_cString, "ljust", rb_str_ljust, -1); rb_define_method(rb_cString, "rjust", rb_str_rjust, -1); rb_define_method(rb_cString, "center", rb_str_center, -1); rb_define_method(rb_cString, "sub", rb_str_sub, -1); rb_define_method(rb_cString, "gsub", rb_str_gsub, -1); rb_define_method(rb_cString, "chop", rb_str_chop, 0); rb_define_method(rb_cString, "chomp", rb_str_chomp, -1); rb_define_method(rb_cString, "strip", rb_str_strip, 0); rb_define_method(rb_cString, "lstrip", rb_str_lstrip, 0); rb_define_method(rb_cString, "rstrip", rb_str_rstrip, 0); rb_define_method(rb_cString, "delete_prefix", rb_str_delete_prefix, 1); rb_define_method(rb_cString, "delete_suffix", rb_str_delete_suffix, 1); rb_define_method(rb_cString, "sub!", rb_str_sub_bang, -1); rb_define_method(rb_cString, "gsub!", rb_str_gsub_bang, -1); rb_define_method(rb_cString, "chop!", rb_str_chop_bang, 0); rb_define_method(rb_cString, "chomp!", rb_str_chomp_bang, -1); rb_define_method(rb_cString, "strip!", rb_str_strip_bang, 0); rb_define_method(rb_cString, "lstrip!", rb_str_lstrip_bang, 0); rb_define_method(rb_cString, "rstrip!", rb_str_rstrip_bang, 0); rb_define_method(rb_cString, "delete_prefix!", rb_str_delete_prefix_bang, 1); rb_define_method(rb_cString, "delete_suffix!", rb_str_delete_suffix_bang, 1); rb_define_method(rb_cString, "tr", rb_str_tr, 2); rb_define_method(rb_cString, "tr_s", rb_str_tr_s, 2); rb_define_method(rb_cString, "delete", rb_str_delete, -1); rb_define_method(rb_cString, "squeeze", rb_str_squeeze, -1); rb_define_method(rb_cString, "count", rb_str_count, -1); rb_define_method(rb_cString, "tr!", rb_str_tr_bang, 2); rb_define_method(rb_cString, "tr_s!", rb_str_tr_s_bang, 2); rb_define_method(rb_cString, "delete!", rb_str_delete_bang, -1); rb_define_method(rb_cString, "squeeze!", rb_str_squeeze_bang, -1); rb_define_method(rb_cString, "each_line", rb_str_each_line, -1); rb_define_method(rb_cString, "each_byte", rb_str_each_byte, 0); rb_define_method(rb_cString, "each_char", rb_str_each_char, 0); rb_define_method(rb_cString, "each_codepoint", rb_str_each_codepoint, 0); rb_define_method(rb_cString, "each_grapheme_cluster", rb_str_each_grapheme_cluster, 0); rb_define_method(rb_cString, "sum", rb_str_sum, -1); rb_define_method(rb_cString, "slice", rb_str_aref_m, -1); rb_define_method(rb_cString, "slice!", rb_str_slice_bang, -1); rb_define_method(rb_cString, "partition", rb_str_partition, 1); rb_define_method(rb_cString, "rpartition", rb_str_rpartition, 1); rb_define_method(rb_cString, "encoding", rb_obj_encoding, 0); /* in encoding.c */ rb_define_method(rb_cString, "force_encoding", rb_str_force_encoding, 1); rb_define_method(rb_cString, "b", rb_str_b, 0); rb_define_method(rb_cString, "valid_encoding?", rb_str_valid_encoding_p, 0); rb_define_method(rb_cString, "ascii_only?", rb_str_is_ascii_only_p, 0); /* define UnicodeNormalize module here so that we don't have to look it up */ mUnicodeNormalize = rb_define_module("UnicodeNormalize"); id_normalize = rb_intern("normalize"); id_normalized_p = rb_intern("normalized?"); rb_define_method(rb_cString, "unicode_normalize", rb_str_unicode_normalize, -1); rb_define_method(rb_cString, "unicode_normalize!", rb_str_unicode_normalize_bang, -1); rb_define_method(rb_cString, "unicode_normalized?", rb_str_unicode_normalized_p, -1); rb_fs = Qnil; rb_define_hooked_variable("$;", &rb_fs, 0, rb_fs_setter); rb_define_hooked_variable("$-F", &rb_fs, 0, rb_fs_setter); rb_gc_register_address(&rb_fs); rb_cSymbol = rb_define_class("Symbol", rb_cObject); rb_include_module(rb_cSymbol, rb_mComparable); rb_undef_alloc_func(rb_cSymbol); rb_undef_method(CLASS_OF(rb_cSymbol), "new"); rb_define_singleton_method(rb_cSymbol, "all_symbols", rb_sym_all_symbols, 0); /* in symbol.c */ rb_define_method(rb_cSymbol, "==", sym_equal, 1); rb_define_method(rb_cSymbol, "===", sym_equal, 1); rb_define_method(rb_cSymbol, "inspect", sym_inspect, 0); rb_define_method(rb_cSymbol, "to_s", rb_sym_to_s, 0); rb_define_method(rb_cSymbol, "id2name", rb_sym_to_s, 0); rb_define_method(rb_cSymbol, "intern", sym_to_sym, 0); rb_define_method(rb_cSymbol, "to_sym", sym_to_sym, 0); rb_define_method(rb_cSymbol, "to_proc", rb_sym_to_proc, 0); rb_define_method(rb_cSymbol, "succ", sym_succ, 0); rb_define_method(rb_cSymbol, "next", sym_succ, 0); rb_define_method(rb_cSymbol, "<=>", sym_cmp, 1); rb_define_method(rb_cSymbol, "casecmp", sym_casecmp, 1); rb_define_method(rb_cSymbol, "casecmp?", sym_casecmp_p, 1); rb_define_method(rb_cSymbol, "=~", sym_match, 1); rb_define_method(rb_cSymbol, "[]", sym_aref, -1); rb_define_method(rb_cSymbol, "slice", sym_aref, -1); rb_define_method(rb_cSymbol, "length", sym_length, 0); rb_define_method(rb_cSymbol, "size", sym_length, 0); rb_define_method(rb_cSymbol, "empty?", sym_empty, 0); rb_define_method(rb_cSymbol, "match", sym_match_m, -1); rb_define_method(rb_cSymbol, "match?", sym_match_m_p, -1); rb_define_method(rb_cSymbol, "upcase", sym_upcase, -1); rb_define_method(rb_cSymbol, "downcase", sym_downcase, -1); rb_define_method(rb_cSymbol, "capitalize", sym_capitalize, -1); rb_define_method(rb_cSymbol, "swapcase", sym_swapcase, -1); rb_define_method(rb_cSymbol, "encoding", sym_encoding, 0); }