diff options
Diffstat (limited to 'ext/mbstring/oniguruma/regparse.c')
| -rw-r--r-- | ext/mbstring/oniguruma/regparse.c | 4215 |
1 files changed, 0 insertions, 4215 deletions
diff --git a/ext/mbstring/oniguruma/regparse.c b/ext/mbstring/oniguruma/regparse.c deleted file mode 100644 index 95a55b2a06..0000000000 --- a/ext/mbstring/oniguruma/regparse.c +++ /dev/null @@ -1,4215 +0,0 @@ -/********************************************************************** - - regparse.c - Oniguruma (regular expression library) - - Copyright (C) 2003 K.Kosako (kosako@sofnec.co.jp) - -**********************************************************************/ -#include "regparse.h" - -#define WARN_BUFSIZE 256 - -#define SYN_POSIX_COMMON_OP \ - ( REG_SYN_OP_ANYCHAR | REG_SYN_OP_POSIX_BRACKET | REG_SYN_OP_BACK_REF | \ - REG_SYN_OP_CC | REG_SYN_OP_0INF | REG_SYN_OP_LINE_ANCHOR | \ - REG_SYN_OP_ESC_CONTROL_CHAR ) - -#define SYN_GNU_REGEX_OP \ - ( REG_SYN_OP_ANYCHAR | REG_SYN_OP_CC | \ - REG_SYN_OP_POSIX_BRACKET | REG_SYN_OP_BACK_REF | \ - REG_SYN_OP_INTERVAL | REG_SYN_OP_SUBEXP | REG_SYN_OP_ALT | \ - REG_SYN_OP_0INF | REG_SYN_OP_1INF | REG_SYN_OP_01 | \ - REG_SYN_OP_ESC_BUF_ANCHOR | REG_SYN_OP_ESC_WORD | \ - REG_SYN_OP_ESC_WORD_BOUND | REG_SYN_OP_ESC_WORD_BEGIN_END | \ - REG_SYN_OP_ESC_WHITE_SPACE | REG_SYN_OP_ESC_DIGIT | \ - REG_SYN_OP_LINE_ANCHOR ) - -#define SYN_GNU_REGEX_BV \ - ( REG_SYN_CONTEXT_INDEP_ANCHORS | REG_SYN_CONTEXT_INDEP_OPS | \ - REG_SYN_CONTEXT_INVALID_OPS | REG_SYN_ALLOW_INVALID_INTERVAL | \ - REG_SYN_ESCAPE_IN_CC | REG_SYN_ALLOW_RANGE_OP_IN_CC ) - -#ifdef USE_VARIABLE_SYNTAX -RegSyntaxType RegSyntaxPosixBasic = { - ( SYN_POSIX_COMMON_OP | REG_SYN_OP_ESC_SUBEXP | REG_SYN_OP_ESC_INTERVAL ) - , 0 - , 0 - , ( REG_OPTION_SINGLELINE | REG_OPTION_MULTILINE ) -}; - -RegSyntaxType RegSyntaxPosixExtended = { - ( SYN_POSIX_COMMON_OP | REG_SYN_OP_SUBEXP | REG_SYN_OP_INTERVAL | - REG_SYN_OP_1INF | REG_SYN_OP_01 | REG_SYN_OP_ALT ) - , 0 - , ( REG_SYN_CONTEXT_INDEP_ANCHORS | - REG_SYN_CONTEXT_INDEP_OPS | REG_SYN_CONTEXT_INVALID_OPS | - REG_SYN_ALLOW_UNMATCHED_CLOSE_SUBEXP | REG_SYN_ALLOW_RANGE_OP_IN_CC ) - , ( REG_OPTION_SINGLELINE | REG_OPTION_MULTILINE ) -}; - -RegSyntaxType RegSyntaxEmacs = { - ( REG_SYN_OP_ANYCHAR | REG_SYN_OP_CC | REG_SYN_OP_ESC_INTERVAL | - REG_SYN_OP_ESC_SUBEXP | REG_SYN_OP_ESC_ALT | - REG_SYN_OP_0INF | REG_SYN_OP_1INF | REG_SYN_OP_01 | - REG_SYN_OP_BACK_REF | REG_SYN_OP_LINE_ANCHOR | - REG_SYN_OP_ESC_GNU_BUF_ANCHOR | REG_SYN_OP_ESC_CONTROL_CHAR ) - , 0 - , REG_SYN_ALLOW_EMPTY_RANGE_IN_CC - , REG_OPTION_NONE -}; - -RegSyntaxType RegSyntaxGrep = { - ( REG_SYN_OP_ANYCHAR | REG_SYN_OP_CC | REG_SYN_OP_POSIX_BRACKET | - REG_SYN_OP_INTERVAL | REG_SYN_OP_ESC_SUBEXP | REG_SYN_OP_ESC_ALT | - REG_SYN_OP_0INF | REG_SYN_OP_ESC_1INF | REG_SYN_OP_ESC_01 | - REG_SYN_OP_LINE_ANCHOR ) - , 0 - , ( REG_SYN_ALLOW_EMPTY_RANGE_IN_CC | REG_SYN_NOT_NEWLINE_IN_NEGATIVE_CC ) - , REG_OPTION_NONE -}; - -RegSyntaxType RegSyntaxGnuRegex = { - SYN_GNU_REGEX_OP - , 0 - , SYN_GNU_REGEX_BV - , REG_OPTION_NONE -}; - -RegSyntaxType RegSyntaxJava = { - (( SYN_GNU_REGEX_OP | REG_SYN_OP_NON_GREEDY | REG_SYN_OP_SUBEXP_EFFECT | - REG_SYN_OP_ESC_CONTROL_CHAR | REG_SYN_OP_ESC_C_CONTROL | - REG_SYN_OP_QUOTE | REG_SYN_OP_ESC_OCTAL3 | REG_SYN_OP_ESC_X_HEX2 ) - & ~REG_SYN_OP_ESC_WORD_BEGIN_END ) - , ( REG_SYN_OP2_OPTION_PERL | - REG_SYN_OP2_POSSESSIVE_REPEAT | REG_SYN_OP2_POSSESSIVE_INTERVAL | - REG_SYN_OP2_CCLASS_SET | REG_SYN_OP2_ESC_V_VTAB | - REG_SYN_OP2_ESC_U_HEX4 ) - , ( SYN_GNU_REGEX_BV | REG_SYN_DIFFERENT_LEN_ALT_LOOK_BEHIND ) - , REG_OPTION_SINGLELINE -}; - -RegSyntaxType RegSyntaxPerl = { - (( SYN_GNU_REGEX_OP | REG_SYN_OP_NON_GREEDY | REG_SYN_OP_SUBEXP_EFFECT | - REG_SYN_OP_ESC_OCTAL3 | REG_SYN_OP_ESC_X_HEX2 | - REG_SYN_OP_ESC_X_BRACE_HEX8 | REG_SYN_OP_ESC_CONTROL_CHAR | - REG_SYN_OP_ESC_C_CONTROL | REG_SYN_OP_QUOTE ) - & ~REG_SYN_OP_ESC_WORD_BEGIN_END ) - , REG_SYN_OP2_OPTION_PERL - , SYN_GNU_REGEX_BV - , REG_OPTION_SINGLELINE -}; -#endif /* USE_VARIABLE_SYNTAX */ - -RegSyntaxType RegSyntaxRuby = { - (( SYN_GNU_REGEX_OP | REG_SYN_OP_NON_GREEDY | REG_SYN_OP_SUBEXP_EFFECT | - REG_SYN_OP_ESC_OCTAL3 | REG_SYN_OP_ESC_X_HEX2 | - REG_SYN_OP_ESC_X_BRACE_HEX8 | REG_SYN_OP_ESC_CONTROL_CHAR | - REG_SYN_OP_ESC_C_CONTROL ) - & ~REG_SYN_OP_ESC_WORD_BEGIN_END ) - , ( REG_SYN_OP2_OPTION_RUBY | - REG_SYN_OP2_NAMED_SUBEXP | REG_SYN_OP2_SUBEXP_CALL | - REG_SYN_OP2_POSSESSIVE_REPEAT | REG_SYN_OP2_CCLASS_SET | - REG_SYN_OP2_ESC_CAPITAL_C_BAR_CONTROL | - REG_SYN_OP2_ESC_M_BAR_META | REG_SYN_OP2_ESC_V_VTAB ) - , ( SYN_GNU_REGEX_BV | REG_SYN_WARN_FOR_CC_OP_NOT_ESCAPED | - REG_SYN_DIFFERENT_LEN_ALT_LOOK_BEHIND ) - , REG_OPTION_NONE -}; - -RegSyntaxType* RegDefaultSyntax = REG_SYNTAX_RUBY; - -#ifdef USE_VARIABLE_SYNTAX -extern int -regex_set_default_syntax(RegSyntaxType* syntax) -{ - if (IS_NULL(syntax)) - syntax = REG_SYNTAX_RUBY; - - RegDefaultSyntax = syntax; - return 0; -} -#endif - -static void -bbuf_free(BBuf* bbuf) -{ - if (IS_NOT_NULL(bbuf)) { - if (IS_NOT_NULL(bbuf->p)) xfree(bbuf->p); - xfree(bbuf); - } -} - -static int -bbuf_clone(BBuf** rto, BBuf* from) -{ - int r; - BBuf *to; - - *rto = to = (BBuf* )xmalloc(sizeof(BBuf)); - CHECK_NULL_RETURN_VAL(to, REGERR_MEMORY); - r = BBUF_INIT(to, from->alloc); - if (r != 0) return r; - to->used = from->used; - xmemcpy(to->p, from->p, from->used); - return 0; -} - -#define WC2MB_MAX_BUFLEN 7 -#define ONOFF(v,f,negative) (negative) ? ((v) &= ~(f)) : ((v) |= (f)) - -#define SET_ALL_MULTI_BYTE_RANGE(pbuf) \ - add_wc_range_to_buf(pbuf, (WCINT )0x80, ~((WCINT )0),\ - (UChar )0x80, (UChar )0xff); - -#define ADD_ALL_MULTI_BYTE_RANGE(code, mbuf) do {\ - if (! IS_SINGLEBYTE_CODE(code)) {\ - r = SET_ALL_MULTI_BYTE_RANGE(&(mbuf));\ - if (r) return r;\ - }\ -} while (0) - - -#define BITSET_IS_EMPTY(bs,empty) do {\ - int i;\ - empty = 1;\ - for (i = 0; i < BITSET_SIZE; i++) {\ - if ((bs)[i] != 0) {\ - empty = 0; break;\ - }\ - }\ -} while (0) - -static void -bitset_set_range(BitSetRef bs, int from, int to) -{ - int i; - for (i = from; i <= to && i < SINGLE_BYTE_SIZE; i++) { - BITSET_SET_BIT(bs, i); - } -} - -static void -bitset_set_all(BitSetRef bs) -{ - int i; - for (i = 0; i < BITSET_SIZE; i++) { - bs[i] = ~((Bits )0); - } -} - -static void -bitset_invert(BitSetRef bs) -{ - int i; - for (i = 0; i < BITSET_SIZE; i++) { - bs[i] = ~(bs[i]); - } -} - -static void -bitset_invert_to(BitSetRef from, BitSetRef to) -{ - int i; - for (i = 0; i < BITSET_SIZE; i++) { - to[i] = ~(from[i]); - } -} - -static void -bitset_and(BitSetRef dest, BitSetRef bs) -{ - int i; - for (i = 0; i < BITSET_SIZE; i++) { - dest[i] &= bs[i]; - } -} - -static void -bitset_or(BitSetRef dest, BitSetRef bs) -{ - int i; - for (i = 0; i < BITSET_SIZE; i++) { - dest[i] |= bs[i]; - } -} - -static void -bitset_copy(BitSetRef dest, BitSetRef bs) -{ - int i; - for (i = 0; i < BITSET_SIZE; i++) { - dest[i] = bs[i]; - } -} - -static int -k_strncmp(UChar* s1, UChar* s2, int n) -{ - int x; - - while (n-- > 0) { - x = *s2++ - *s1++; - if (x) return x; - } - return 0; -} - -static void -k_strcpy(UChar* dest, UChar* src, UChar* end) -{ - int len = end - src; - if (len > 0) { - xmemcpy(dest, src, len); - dest[len] = (UChar )0; - } -} - -extern UChar* -regex_strdup(UChar* s, UChar* end) -{ - int len = end - s; - - if (len > 0) { - UChar* r = (UChar* )xmalloc(len + 1); - CHECK_NULL_RETURN(r); - xmemcpy(r, s, len); - r[len] = (UChar )0; - return r; - } - else return NULL; -} - -/* scan pattern methods */ -#define PEND_VALUE -1 - -#define PFETCH(c) do { (c) = *p++; } while (0) -#define PUNFETCH p-- -#define PINC p++ -#define PPEEK (p < end ? *p : PEND_VALUE) -#define PEND (p < end ? 0 : 1) - -#ifdef REG_RUBY_M17N - -static int -wc2mb_buf(WCINT wc, UChar **bufs, UChar **bufe, RegCharEncoding enc) -{ - int c, len; - - c = m17n_firstbyte(enc, wc); - len = mblen(enc, c); - if (len > (*bufe - *bufs)) { - *bufs = xmalloc(len); - CHECK_NULL_RETURN_VAL(*bufs, REGERR_MEMORY); - } - m17n_mbcput(enc, wc, *bufs); - *bufe = *bufs + len; - return 0; -} - -#else /* REG_RUBY_M17N */ - -extern int -regex_wc2mb_first(RegCharEncoding code, WCINT wc) -{ - if (code == REGCODE_ASCII) { - return (wc & 0xff); - } - else if (code == REGCODE_UTF8) { - if ((wc & 0xffffff80) == 0) - return wc; - else { - if ((wc & 0xfffff800) == 0) - return ((wc>>6)& 0x1f) | 0xc0; - else if ((wc & 0xffff0000) == 0) - return ((wc>>12) & 0x0f) | 0xe0; - else if ((wc & 0xffe00000) == 0) - return ((wc>>18) & 0x07) | 0xf0; - else if ((wc & 0xfc000000) == 0) - return ((wc>>24) & 0x03) | 0xf8; - else if ((wc & 0x80000000) == 0) - return ((wc>>30) & 0x01) | 0xfc; - else { - return REGERR_TOO_BIG_WIDE_CHAR_VALUE; - } - } - } - else { - int first; - - if ((wc & 0xff0000) != 0) { - first = (wc >> 16) & 0xff; - if (mblen(code, first) != 3) - return REGERR_INVALID_WIDE_CHAR_VALUE; - } - else if ((wc & 0xff00) != 0) { - first = (wc >> 8) & 0xff; - if (mblen(code, first) != 2) - return REGERR_INVALID_WIDE_CHAR_VALUE; - } - else { - if (mblen(code, wc) != 1) - return REGERR_INVALID_WIDE_CHAR_VALUE; - return wc; - } - return first; - } -} - -static int -wc2mb(WCINT wc, UChar buf[], RegCharEncoding code) -{ -#define UTF8_TRAILS(wc, shift) ((((wc) >> (shift)) & 0x3f) | 0x80) -#define UTF8_TRAIL0(wc) (((wc) & 0x3f) | 0x80) - - UChar *p = buf; - - if (code == REGCODE_UTF8) { - if ((wc & 0xffffff80) == 0) - *p++ = wc; - else { - if ((wc & 0xfffff800) == 0) { - *p++ = ((wc>>6)& 0x1f) | 0xc0; - } - else if ((wc & 0xffff0000) == 0) { - *p++ = ((wc>>12) & 0x0f) | 0xe0; - *p++ = UTF8_TRAILS(wc, 6); - } - else if ((wc & 0xffe00000) == 0) { - *p++ = ((wc>>18) & 0x07) | 0xf0; - *p++ = UTF8_TRAILS(wc, 12); - *p++ = UTF8_TRAILS(wc, 6); - } - else if ((wc & 0xfc000000) == 0) { - *p++ = ((wc>>24) & 0x03) | 0xf8; - *p++ = UTF8_TRAILS(wc, 18); - *p++ = UTF8_TRAILS(wc, 12); - *p++ = UTF8_TRAILS(wc, 6); - } - else if ((wc & 0x80000000) == 0) { - *p++ = ((wc>>30) & 0x01) | 0xfc; - *p++ = UTF8_TRAILS(wc, 24); - *p++ = UTF8_TRAILS(wc, 18); - *p++ = UTF8_TRAILS(wc, 12); - *p++ = UTF8_TRAILS(wc, 6); - } - else { - return REGERR_TOO_BIG_WIDE_CHAR_VALUE; - } - *p++ = UTF8_TRAIL0(wc); - } - } - else { - if ((wc & 0xff0000) != 0) *p++ = ((wc >> 16) & 0xff); - if ((wc & 0xff00) != 0) *p++ = ((wc >> 8) & 0xff); - *p++ = (wc & 0xff); - - if (mblen(code, buf[0]) != (p - buf)) - return REGERR_INVALID_WIDE_CHAR_VALUE; - } - - return p - buf; -} - -static int -wc2mb_buf(WCINT wc, UChar **bufs, UChar **bufe, RegCharEncoding code) -{ - int r; - r = wc2mb(wc, *bufs, code); - if (r < 0) return r; - - *bufe = (*bufs) + r; - return 0; -} -#endif /* not REG_RUBY_M17N */ - -/* used as function pointer value */ -static int -is_code_ascii(RegCharEncoding code, UChar c) -{ - return (c < 128 ? 1 : 0); -} - -static int -is_code_graph(RegCharEncoding code, UChar c) { return IS_CODE_GRAPH(code, c); } -static int -is_code_print(RegCharEncoding code, UChar c) { return IS_CODE_PRINT(code, c); } -static int -is_code_alnum(RegCharEncoding code, UChar c) { return IS_CODE_ALNUM(code, c); } -static int -is_code_alpha(RegCharEncoding code, UChar c) { return IS_CODE_ALPHA(code, c); } -static int -is_code_lower(RegCharEncoding code, UChar c) { return IS_CODE_LOWER(code, c); } -static int -is_code_upper(RegCharEncoding code, UChar c) { return IS_CODE_UPPER(code, c); } -static int -is_code_cntrl(RegCharEncoding code, UChar c) { return IS_CODE_CNTRL(code, c); } -static int -is_code_punct(RegCharEncoding code, UChar c) { return IS_CODE_PUNCT(code, c); } -static int -is_code_space(RegCharEncoding code, UChar c) { return IS_CODE_SPACE(code, c); } -static int -is_code_blank(RegCharEncoding code, UChar c) { return IS_CODE_BLANK(code, c); } -static int -is_code_digit(RegCharEncoding code, UChar c) { return IS_CODE_DIGIT(code, c); } -static int -is_code_xdigit(RegCharEncoding code, UChar c) { return IS_CODE_XDIGIT(code, c); } - -static UChar* -k_strcat_capa(UChar* dest, UChar* dest_end, UChar* src, UChar* src_end, int capa) -{ - UChar* r; - - if (dest) - r = (UChar* )xrealloc(dest, capa + 1); - else - r = (UChar* )xmalloc(capa + 1); - - CHECK_NULL_RETURN(r); - k_strcpy(r + (dest_end - dest), src, src_end); - return r; -} - -/* dest on static area */ -static UChar* -strcat_capa_from_static(UChar* dest, UChar* dest_end, - UChar* src, UChar* src_end, int capa) -{ - UChar* r; - - r = (UChar* )xmalloc(capa + 1); - CHECK_NULL_RETURN(r); - k_strcpy(r, dest, dest_end); - k_strcpy(r + (dest_end - dest), src, src_end); - return r; -} - -#ifdef USE_NAMED_SUBEXP - -#define INIT_NAME_BACKREFS_ALLOC_NUM 8 - -typedef struct { - UChar* name; - int name_len; /* byte length */ - int back_num; /* number of backrefs */ - int back_alloc; - int back_ref1; - int* back_refs; -} NameEntry; - -#ifdef USE_ST_HASH_TABLE - -#include <st.h> - -typedef st_table NameTable; -typedef st_data_t HashDataType; /* 1.6 st.h doesn't define st_data_t type */ - -#define NAMEBUF_SIZE 24 -#define NAMEBUF_SIZE_1 25 - -#ifdef REG_DEBUG -static int -i_print_name_entry(UChar* key, NameEntry* e, void* arg) -{ - int i; - FILE* fp = (FILE* )arg; - - fprintf(fp, "%s: ", e->name); - if (e->back_num == 0) - fputs("-", fp); - else if (e->back_num == 1) - fprintf(fp, "%d", e->back_ref1); - else { - for (i = 0; i < e->back_num; i++) { - if (i > 0) fprintf(fp, ", "); - fprintf(fp, "%d", e->back_refs[i]); - } - } - fputs("\n", fp); - return ST_CONTINUE; -} - -extern int -regex_print_names(FILE* fp, regex_t* reg) -{ - NameTable* t = (NameTable* )reg->name_table; - - if (IS_NOT_NULL(t)) { - fprintf(fp, "name table\n"); - st_foreach(t, i_print_name_entry, (HashDataType )fp); - fputs("\n", fp); - } - return 0; -} -#endif - -static int -i_free_name_entry(UChar* key, NameEntry* e, void* arg) -{ - xfree(e->name); /* == key */ - if (IS_NOT_NULL(e->back_refs)) xfree(e->back_refs); - return ST_DELETE; -} - -static int -names_clear(regex_t* reg) -{ - NameTable* t = (NameTable* )reg->name_table; - - if (IS_NOT_NULL(t)) { - st_foreach(t, i_free_name_entry, 0); - } - return 0; -} - -extern int -regex_names_free(regex_t* reg) -{ - int r; - NameTable* t; - - r = names_clear(reg); - if (r) return r; - - t = (NameTable* )reg->name_table; - if (IS_NOT_NULL(t)) st_free_table(t); - reg->name_table = (void* )NULL; - return 0; -} - -static NameEntry* -name_find(regex_t* reg, UChar* name, UChar* name_end) -{ - int len; - UChar namebuf[NAMEBUF_SIZE_1]; - UChar *key; - NameEntry* e; - NameTable* t = (NameTable* )reg->name_table; - - e = (NameEntry* )NULL; - if (IS_NOT_NULL(t)) { - if (*name_end == '\0') { - key = name; - } - else { - /* dirty, but st.c API claims NULL terminated key. */ - len = name_end - name; - if (len <= NAMEBUF_SIZE) { - xmemcpy(namebuf, name, len); - namebuf[len] = '\0'; - key = namebuf; - } - else { - key = regex_strdup(name, name_end); - if (IS_NULL(key)) return (NameEntry* )NULL; - } - } - - st_lookup(t, (HashDataType )key, (HashDataType * )&e); - if (key != name && key != namebuf) xfree(key); - } - return e; -} - -typedef struct { - int (*func)(UChar*,int,int*,void*); - void* arg; - int ret; -} INamesArg; - -static int -i_names(UChar* key, NameEntry* e, INamesArg* arg) -{ - int r = (*(arg->func))(e->name, e->back_num, - (e->back_num > 1 ? e->back_refs : &(e->back_ref1)), arg->arg); - if (r != 0) { - arg->ret = r; - return ST_STOP; - } - return ST_CONTINUE; -} - -extern int -regex_foreach_name(regex_t* reg, int (*func)(UChar*,int,int*,void*), void* arg) -{ - INamesArg narg; - NameTable* t = (NameTable* )reg->name_table; - - narg.ret = 0; - if (IS_NOT_NULL(t)) { - narg.func = func; - narg.arg = arg; - st_foreach(t, i_names, (HashDataType )&narg); - } - return narg.ret; -} - -#else /* USE_ST_HASH_TABLE */ - -#define INIT_NAMES_ALLOC_NUM 8 - -typedef struct { - NameEntry* e; - int num; - int alloc; -} NameTable; - - -#ifdef REG_DEBUG -extern int -regex_print_names(FILE* fp, regex_t* reg) -{ - int i, j; - NameEntry* e; - NameTable* t = (NameTable* )reg->name_table; - - if (IS_NOT_NULL(t) && t->num > 0) { - fprintf(fp, "name table\n"); - for (i = 0; i < t->num; i++) { - e = &(t->e[i]); - fprintf(fp, "%s: ", e->name); - if (e->back_num == 0) { - fputs("-", fp); - } - else if (e->back_num == 1) { - fprintf(fp, "%d", e->back_ref1); - } - else { - for (j = 0; j < e->back_num; j++) { - if (j > 0) fprintf(fp, ", "); - fprintf(fp, "%d", e->back_refs[j]); - } - } - fputs("\n", fp); - } - fputs("\n", fp); - } - return 0; -} -#endif - -static int -names_clear(regex_t* reg) -{ - int i; - NameEntry* e; - NameTable* t = (NameTable* )reg->name_table; - - if (IS_NOT_NULL(t)) { - for (i = 0; i < t->num; i++) { - e = &(t->e[i]); - if (IS_NOT_NULL(e->name)) { - xfree(e->name); - e->name = NULL; - e->name_len = 0; - e->back_num = 0; - e->back_alloc = 0; - if (IS_NOT_NULL(e->back_refs)) xfree(e->back_refs); - e->back_refs = (int* )NULL; - } - } - t->num = 0; - } - return 0; -} - -extern int -regex_names_free(regex_t* reg) -{ - int r; - NameTable* t; - - r = names_clear(reg); - if (r) return r; - - t = (NameTable* )reg->name_table; - if (IS_NOT_NULL(t)) xfree(t); - reg->name_table = NULL; - return 0; -} - -static NameEntry* -name_find(regex_t* reg, UChar* name, UChar* name_end) -{ - int i, len; - NameEntry* e; - NameTable* t = (NameTable* )reg->name_table; - - if (IS_NOT_NULL(t)) { - len = name_end - name; - for (i = 0; i < t->num; i++) { - e = &(t->e[i]); - if (len == e->name_len && k_strncmp(name, e->name, len) == 0) - return e; - } - } - return (NameEntry* )NULL; -} - -extern int -regex_foreach_name(regex_t* reg, int (*func)(UChar*,int,int*,void*), void* arg) -{ - int i, r; - NameEntry* e; - NameTable* t = (NameTable* )reg->name_table; - - if (IS_NOT_NULL(t)) { - for (i = 0; i < t->num; i++) { - e = &(t->e[i]); - r = (*func)(e->name, e->back_num, - (e->back_num > 1 ? e->back_refs : &(e->back_ref1)), arg); - if (r != 0) return r; - } - } - return 0; -} - -#endif /* else USE_ST_HASH_TABLE */ - -static int -name_add(regex_t* reg, UChar* name, UChar* name_end, int backref) -{ - int alloc; - NameEntry* e; - NameTable* t = (NameTable* )reg->name_table; - - if (name_end - name <= 0) - return REGERR_INVALID_SUBEXP_NAME; - - e = name_find(reg, name, name_end); - if (IS_NULL(e)) { -#ifdef USE_ST_HASH_TABLE - if (IS_NULL(t)) { - reg->name_table = t = st_init_strtable(); - } - e = (NameEntry* )xmalloc(sizeof(NameEntry)); - CHECK_NULL_RETURN_VAL(e, REGERR_MEMORY); - - e->name = regex_strdup(name, name_end); - if (IS_NULL(e->name)) return REGERR_MEMORY; - st_insert(t, (HashDataType )e->name, (HashDataType )e); - - e->name_len = name_end - name; - e->back_num = 0; - e->back_alloc = 0; - e->back_refs = (int* )NULL; - -#else - - if (IS_NULL(t)) { - alloc = INIT_NAMES_ALLOC_NUM; - t = (NameTable* )xmalloc(sizeof(NameTable)); - CHECK_NULL_RETURN_VAL(t, REGERR_MEMORY); - t->e = NULL; - t->alloc = 0; - t->num = 0; - - t->e = (NameEntry* )xmalloc(sizeof(NameEntry) * alloc); - if (IS_NULL(t->e)) { - xfree(t); - return REGERR_MEMORY; - } - t->alloc = alloc; - reg->name_table = t; - goto clear; - } - else if (t->num == t->alloc) { - int i; - - alloc = t->alloc * 2; - t->e = (NameEntry* )xrealloc(t->e, sizeof(NameEntry) * alloc); - CHECK_NULL_RETURN_VAL(t->e, REGERR_MEMORY); - t->alloc = alloc; - - clear: - for (i = t->num; i < t->alloc; i++) { - t->e[i].name = NULL; - t->e[i].name_len = 0; - t->e[i].back_num = 0; - t->e[i].back_alloc = 0; - t->e[i].back_refs = (int* )NULL; - } - } - e = &(t->e[t->num]); - t->num++; - e->name = regex_strdup(name, name_end); - e->name_len = name_end - name; -#endif - } - - e->back_num++; - if (e->back_num == 1) { - e->back_ref1 = backref; - } - else if (e->back_num == 2) { - alloc = INIT_NAME_BACKREFS_ALLOC_NUM; - e->back_refs = (int* )xmalloc(sizeof(int) * alloc); - CHECK_NULL_RETURN_VAL(e->back_refs, REGERR_MEMORY); - e->back_alloc = alloc; - e->back_refs[0] = e->back_ref1; - e->back_refs[1] = backref; - } - else { - if (e->back_num > e->back_alloc) { - alloc = e->back_alloc * 2; - e->back_refs = (int* )xrealloc(e->back_refs, sizeof(int) * alloc); - CHECK_NULL_RETURN_VAL(e->back_refs, REGERR_MEMORY); - e->back_alloc = alloc; - } - e->back_refs[e->back_num - 1] = backref; - } - - return 0; -} - -extern int -regex_name_to_group_numbers(regex_t* reg, UChar* name, UChar* name_end, - int** nums) -{ - NameEntry* e; - - e = name_find(reg, name, name_end); - if (IS_NULL(e)) return REGERR_UNDEFINED_NAME_REFERENCE; - - switch (e->back_num) { - case 0: - break; - case 1: - *nums = &(e->back_ref1); - break; - default: - *nums = e->back_refs; - break; - } - return e->back_num; -} - -#else - -extern int -regex_name_to_group_numbers(regex_t* reg, UChar* name, UChar* name_end, - int** nums) -{ - return REG_NO_SUPPORT_CONFIG; -} - -extern int -regex_foreach_name(regex_t* reg, int (*func)(UChar*,int,int*,void*), void* arg) -{ - return REG_NO_SUPPORT_CONFIG; -} -#endif - - -#define INIT_SCANENV_MEMNODES_ALLOC_SIZE 16 - -static void -scan_env_clear(ScanEnv* env) -{ - int i; - - BIT_STATUS_CLEAR(env->backtrack_mem); - BIT_STATUS_CLEAR(env->backrefed_mem); - env->error = (UChar* )NULL; - env->error_end = (UChar* )NULL; - env->num_call = 0; - env->num_mem = 0; - env->mem_alloc = 0; - env->mem_nodes_dynamic = (Node** )NULL; - - for (i = 0; i < SCANENV_MEMNODES_SIZE; i++) - env->mem_nodes_static[i] = NULL_NODE; -} - -static int -scan_env_add_mem_entry(ScanEnv* env) -{ - int i, need, alloc; - Node** p; - - need = env->num_mem + 1; - if (need >= SCANENV_MEMNODES_SIZE) { - if (env->mem_alloc <= need) { - if (IS_NULL(env->mem_nodes_dynamic)) { - alloc = INIT_SCANENV_MEMNODES_ALLOC_SIZE; - p = (Node** )xmalloc(sizeof(Node*) * alloc); - xmemcpy(p, env->mem_nodes_static, - sizeof(Node*) * SCANENV_MEMNODES_SIZE); - } - else { - alloc = env->mem_alloc * 2; - p = (Node** )xrealloc(env->mem_nodes_dynamic, sizeof(Node*) * alloc); - } - CHECK_NULL_RETURN_VAL(p, REGERR_MEMORY); - - for (i = env->num_mem + 1; i < alloc; i++) - p[i] = NULL_NODE; - - env->mem_nodes_dynamic = p; - env->mem_alloc = alloc; - } - } - - env->num_mem++; - return env->num_mem; -} - -static int -scan_env_set_mem_node(ScanEnv* env, int num, Node* node) -{ - if (env->num_mem >= num) - SCANENV_MEM_NODES(env)[num] = node; - else - return REGERR_INVALID_BACKREF; - return 0; -} - - -#ifdef USE_RECYCLE_NODE -typedef struct _FreeNode { - struct _FreeNode* next; -} FreeNode; - -static FreeNode* FreeNodeList = (FreeNode* )NULL; -#endif - -extern void -regex_node_free(Node* node) -{ - if (IS_NULL(node)) return ; - - switch (NTYPE(node)) { - case N_STRING: - if (IS_NOT_NULL(NSTRING(node).s) && NSTRING(node).s != NSTRING(node).buf) { - xfree(NSTRING(node).s); - } - break; - - case N_LIST: - case N_ALT: - regex_node_free(NCONS(node).left); - regex_node_free(NCONS(node).right); - break; - - case N_CCLASS: - if (NCCLASS(node).mbuf) - bbuf_free(NCCLASS(node).mbuf); - break; - - case N_QUALIFIER: - if (NQUALIFIER(node).target) - regex_node_free(NQUALIFIER(node).target); - break; - - case N_EFFECT: - if (NEFFECT(node).target) - regex_node_free(NEFFECT(node).target); - break; - - case N_BACKREF: - if (IS_NOT_NULL(NBACKREF(node).back_dynamic)) - xfree(NBACKREF(node).back_dynamic); - break; - - case N_ANCHOR: - if (NANCHOR(node).target) - regex_node_free(NANCHOR(node).target); - break; - } - -#ifdef USE_RECYCLE_NODE - { - FreeNode* n; - - n = (FreeNode* )node; - n->next = FreeNodeList; - FreeNodeList = n; - } -#else - xfree(node); -#endif -} - -#ifdef USE_RECYCLE_NODE -extern int -regex_free_node_list() -{ - FreeNode* n; - - THREAD_ATOMIC_START; - while (FreeNodeList) { - n = FreeNodeList; - FreeNodeList = FreeNodeList->next; - xfree(n); - } - THREAD_ATOMIC_END; - return 0; -} -#endif - -static Node* -node_new() -{ - Node* node; - -#ifdef USE_RECYCLE_NODE - if (IS_NOT_NULL(FreeNodeList)) { - node = (Node* )FreeNodeList; - FreeNodeList = FreeNodeList->next; - return node; - } -#endif - - node = (Node* )xmalloc(sizeof(Node)); - return node; -} - - -static void -initialize_cclass(CClassNode* cc) -{ - BITSET_CLEAR(cc->bs); - cc->not = 0; - cc->mbuf = NULL; -} - -static Node* -node_new_cclass() -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_CCLASS; - - initialize_cclass(&(NCCLASS(node))); - return node; -} - -static Node* -node_new_ctype(int type) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_CTYPE; - NCTYPE(node).type = type; - return node; -} - -static Node* -node_new_anychar() -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_ANYCHAR; - return node; -} - -static Node* -node_new_list(Node* left, Node* right) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_LIST; - NCONS(node).left = left; - NCONS(node).right = right; - return node; -} - -static Node* -node_new_alt(Node* left, Node* right) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_ALT; - NCONS(node).left = left; - NCONS(node).right = right; - return node; -} - -extern Node* -regex_node_new_anchor(int type) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_ANCHOR; - NANCHOR(node).type = type; - NANCHOR(node).target = NULL; - NANCHOR(node).char_len = -1; - return node; -} - -static Node* -node_new_backref(int back_num, int* backrefs, ScanEnv* env) -{ - int i; - Node* node = node_new(); - - CHECK_NULL_RETURN(node); - node->type = N_BACKREF; - NBACKREF(node).state = 0; - NBACKREF(node).back_num = back_num; - NBACKREF(node).back_dynamic = (int* )NULL; - - for (i = 0; i < back_num; i++) { - if (backrefs[i] <= env->num_mem && - IS_NULL(SCANENV_MEM_NODES(env)[backrefs[i]])) { - NBACKREF(node).state |= NST_RECURSION; /* /...(\1).../ */ - break; - } - } - - if (back_num <= NODE_BACKREFS_SIZE) { - for (i = 0; i < back_num; i++) - NBACKREF(node).back_static[i] = backrefs[i]; - } - else { - int* p = (int* )xmalloc(sizeof(int) * back_num); - if (IS_NULL(p)) { - regex_node_free(node); - return NULL; - } - NBACKREF(node).back_dynamic = p; - for (i = 0; i < back_num; i++) - p[i] = backrefs[i]; - } - return node; -} - -#ifdef USE_SUBEXP_CALL -static Node* -node_new_call(UChar* name, UChar* name_end) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - - node->type = N_CALL; - NCALL(node).state = 0; - NCALL(node).ref_num = CALLNODE_REFNUM_UNDEF; - NCALL(node).target = NULL_NODE; - NCALL(node).name = name; - NCALL(node).name_end = name_end; - return node; -} -#endif - -static Node* -node_new_qualifier(int lower, int upper, int by_number) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_QUALIFIER; - NQUALIFIER(node).target = NULL; - NQUALIFIER(node).lower = lower; - NQUALIFIER(node).upper = upper; - NQUALIFIER(node).greedy = 1; - NQUALIFIER(node).by_number = by_number; - NQUALIFIER(node).target_may_empty = 0; - NQUALIFIER(node).head_exact = NULL_NODE; - NQUALIFIER(node).next_head_exact = NULL_NODE; - NQUALIFIER(node).is_refered = 0; - return node; -} - -static Node* -node_new_effect(int type) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - node->type = N_EFFECT; - NEFFECT(node).type = type; - NEFFECT(node).state = 0; - NEFFECT(node).regnum = 0; - NEFFECT(node).option = 0; - NEFFECT(node).target = NULL; - NEFFECT(node).call_addr = -1; - NEFFECT(node).opt_count = 0; - return node; -} - -extern Node* -regex_node_new_effect(int type) -{ - return node_new_effect(type); -} - -static Node* -node_new_option(RegOptionType option) -{ - Node* node = node_new_effect(EFFECT_OPTION); - CHECK_NULL_RETURN(node); - NEFFECT(node).option = option; - return node; -} - -extern int -regex_node_str_cat(Node* node, UChar* s, UChar* end) -{ - int addlen = end - s; - - if (addlen > 0) { - int len = NSTRING(node).end - NSTRING(node).s; - - if (NSTRING(node).capa > 0 || (len + addlen > NODE_STR_BUF_SIZE - 1)) { - UChar* p; - int capa = len + addlen + NODE_STR_MARGIN; - - if (capa <= NSTRING(node).capa) { - k_strcpy(NSTRING(node).s + len, s, end); - } - else { - if (NSTRING(node).s == NSTRING(node).buf) - p = strcat_capa_from_static(NSTRING(node).s, NSTRING(node).end, - s, end, capa); - else - p = k_strcat_capa(NSTRING(node).s, NSTRING(node).end, s, end, capa); - - CHECK_NULL_RETURN_VAL(p, REGERR_MEMORY); - NSTRING(node).s = p; - NSTRING(node).capa = capa; - } - } - else { - k_strcpy(NSTRING(node).s + len, s, end); - } - NSTRING(node).end = NSTRING(node).s + len + addlen; - } - - return 0; -} - -static int -node_str_cat_char(Node* node, UChar c) -{ - UChar s[1]; - - s[0] = c; - return regex_node_str_cat(node, s, s + 1); -} - -extern void -regex_node_conv_to_str_node(Node* node, int flag) -{ - node->type = N_STRING; - - NSTRING(node).flag = flag; - NSTRING(node).capa = 0; - NSTRING(node).s = NSTRING(node).buf; - NSTRING(node).end = NSTRING(node).buf; -} - -static Node* -node_new_str(UChar* s, UChar* end) -{ - Node* node = node_new(); - CHECK_NULL_RETURN(node); - - node->type = N_STRING; - NSTRING(node).capa = 0; - NSTRING(node).flag = 0; - NSTRING(node).s = NSTRING(node).buf; - NSTRING(node).end = NSTRING(node).buf; - if (regex_node_str_cat(node, s, end)) { - regex_node_free(node); - return NULL; - } - return node; -} - -static Node* -node_new_str_raw(UChar* s, UChar* end) -{ - Node* node = node_new_str(s, end); - NSTRING_SET_RAW(node); - return node; -} - -static Node* -node_new_empty() -{ - return node_new_str(NULL, NULL); -} - -static Node* -node_new_str_char(UChar c) -{ - UChar p[1]; - - p[0] = c; - return node_new_str(p, p + 1); -} - -static Node* -node_new_str_raw_char(UChar c) -{ - UChar p[1]; - - p[0] = c; - return node_new_str_raw(p, p + 1); -} - -static Node* -str_node_split_last_char(StrNode* sn, RegCharEncoding enc) -{ - UChar *p; - Node* n = NULL_NODE; - - if (sn->end > sn->s) { - p = regex_get_prev_char_head(enc, sn->s, sn->end); - if (p && p > sn->s) { /* can be splitted. */ - n = node_new_str(p, sn->end); - if ((sn->flag & NSTR_RAW) != 0) - NSTRING_SET_RAW(n); - sn->end = p; - } - } - return n; -} - -static int -str_node_can_be_split(StrNode* sn, RegCharEncoding enc) -{ - if (sn->end > sn->s) { - return ((mblen(enc, *(sn->s)) < sn->end - sn->s) ? 1 : 0); - } - return 0; -} - -extern int -regex_scan_unsigned_number(UChar** src, UChar* end, RegCharEncoding enc) -{ - unsigned int num, val; - int c; - UChar* p = *src; - - num = 0; - while (!PEND) { - PFETCH(c); - if (IS_CODE_DIGIT(enc, c)) { - val = (unsigned int )DIGITVAL(c); - if ((INT_MAX_LIMIT - val) / 10UL < num) - return -1; /* overflow */ - - num = num * 10 + val; - } - else { - PUNFETCH; - break; - } - } - *src = p; - return num; -} - -static int -scan_unsigned_hexadecimal_number(UChar** src, UChar* end, int maxlen, - RegCharEncoding enc) -{ - int c; - unsigned int num, val; - UChar* p = *src; - - num = 0; - while (!PEND && maxlen-- != 0) { - PFETCH(c); - if (IS_CODE_XDIGIT(enc, c)) { - val = (unsigned int )XDIGITVAL(c); - if ((INT_MAX_LIMIT - val) / 16UL < num) - return -1; /* overflow */ - - num = (num << 4) + XDIGITVAL(c); - } - else { - PUNFETCH; - break; - } - } - *src = p; - return num; -} - -static int -scan_unsigned_octal_number(UChar** src, UChar* end, int maxlen, - RegCharEncoding enc) -{ - int c; - unsigned int num, val; - UChar* p = *src; - - num = 0; - while (!PEND && maxlen-- != 0) { - PFETCH(c); - if (IS_CODE_ODIGIT(enc, c)) { - val = ODIGITVAL(c); - if ((INT_MAX_LIMIT - val) / 8UL < num) - return -1; /* overflow */ - - num = (num << 3) + val; - } - else { - PUNFETCH; - break; - } - } - *src = p; - return num; -} - - -#define BBUF_WRITE_WCINT(bbuf,pos,wc) \ - BBUF_WRITE(bbuf, pos, &(wc), SIZE_WCINT) - -/* data format: - [multi-byte-head-BitSet][n][from-1][to-1][from-2][to-2] ... [from-n][to-n] - (all data size is WCINT) - */ -static int -new_wc_range(BBuf** pbuf) -{ -#define INIT_MULTI_BYTE_RANGE_SIZE (SIZE_WCINT * 5) - int r; - WCINT n; - BBuf* bbuf; - - bbuf = *pbuf = (BBuf* )xmalloc(sizeof(BBuf)); - CHECK_NULL_RETURN_VAL(*pbuf, REGERR_MEMORY); - r = BBUF_INIT(*pbuf, SIZE_BITSET + INIT_MULTI_BYTE_RANGE_SIZE); - if (r) return r; - - n = 0; - BBUF_WRITE_WCINT(bbuf, SIZE_BITSET, n); - BITSET_CLEAR((BitSetRef )bbuf->p); - return 0; -} - -static int -add_wc_range_to_buf(BBuf** pbuf, WCINT from, WCINT to, UChar cfrom, UChar cto) -{ - int r, inc_n, pos; - int low, high, bound, x; - WCINT n, *data; - BBuf* bbuf; - - if (from > to) { - n = from; from = to; to = n; - } - - if (IS_NULL(*pbuf)) { - r = new_wc_range(pbuf); - if (r) return r; - bbuf = *pbuf; - n = 0; - } - else { - bbuf = *pbuf; - GET_WCINT(n, bbuf->p + SIZE_BITSET); - } - data = (WCINT* )(bbuf->p + SIZE_BITSET); - data++; - - for (low = 0, bound = n; low < bound; ) { - x = (low + bound) >> 1; - if (from > data[x*2 + 1]) - low = x + 1; - else - bound = x; - } - - for (high = low, bound = n; high < bound; ) { - x = (high + bound) >> 1; - if (to >= data[x*2] - 1) - high = x + 1; - else - bound = x; - } - - inc_n = low + 1 - high; - if (n + inc_n > REG_MAX_MULTI_BYTE_RANGES_NUM) - return REGERR_TOO_MANY_MULTI_BYTE_RANGES; - - if (inc_n != 1) { - if (from > data[low*2]) - from = data[low*2]; - if (to < data[(high - 1)*2 + 1]) - to = data[(high - 1)*2 + 1]; - } - - if (inc_n != 0 && high < n) { - int from_pos = SIZE_BITSET + SIZE_WCINT * (1 + high * 2); - int to_pos = SIZE_BITSET + SIZE_WCINT * (1 + (low + 1) * 2); - int size = (n - high) * 2 * SIZE_WCINT; - - if (inc_n > 0) { - BBUF_MOVE_RIGHT(bbuf, from_pos, to_pos, size); - } - else { - BBUF_MOVE_LEFT_REDUCE(bbuf, from_pos, to_pos); - } - } - - pos = SIZE_BITSET + SIZE_WCINT * (1 + low * 2); - BBUF_ENSURE_SIZE(bbuf, pos + SIZE_WCINT * 2); - BBUF_WRITE_WCINT(bbuf, pos, from); - BBUF_WRITE_WCINT(bbuf, pos + SIZE_WCINT, to); - n += inc_n; - BBUF_WRITE_WCINT(bbuf, SIZE_BITSET, n); - - if (inc_n > 0) { - int i; - UChar tmp; - - if (cfrom > cto) { - tmp = cfrom; cfrom = cto; cto = tmp; - } - - for (i = cfrom; i <= cto; i++) { - BITSET_SET_BIT((BitSetRef)bbuf->p, i); - } - } - return 0; -} - -static int -add_wc_range(BBuf** pbuf, ScanEnv* env, WCINT from, WCINT to) -{ - int cfrom, cto; - - if (from > to) { - if (IS_SYNTAX_BV(env->syntax, REG_SYN_ALLOW_EMPTY_RANGE_IN_CC)) - return 0; - else - return REGERR_EMPTY_RANGE_IN_CHAR_CLASS; - } - - cfrom = WC2MB_FIRST(env->enc, from); - if (cfrom < 0) return cfrom; - cto = WC2MB_FIRST(env->enc, to); - if (cto < 0) return cto; - return add_wc_range_to_buf(pbuf, from, to, (UChar )cfrom, (UChar )cto); -} - -static int -not_wc_range_buf(BBuf* bbuf, BBuf** pbuf) -{ - int r, i, n; - WCINT pre, from, to, *data; - - *pbuf = (BBuf* )NULL; - if (IS_NULL(bbuf)) { - set_all: - return SET_ALL_MULTI_BYTE_RANGE(pbuf); - } - - data = (WCINT* )(bbuf->p + SIZE_BITSET); - GET_WCINT(n, data); - data++; - if (n <= 0) goto set_all; - - r = 0; - pre = 0x80; - for (i = 0; i < n; i++) { - from = data[i*2]; - to = data[i*2+1]; - if (pre <= from - 1) { - r = add_wc_range_to_buf(pbuf, pre, from - 1, (UChar )0, (UChar )0); - if (r != 0) return r; - } - if (to == ~((WCINT )0)) break; - pre = to + 1; - } - if (to < ~((WCINT )0)) { - r = add_wc_range_to_buf(pbuf, to + 1, ~((WCINT )0), (UChar )0, (UChar )0); - } - return r; -} - -#define SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2) do {\ - BBuf *tbuf; \ - int tnot; \ - tnot = not1; not1 = not2; not2 = tnot; \ - tbuf = bbuf1; bbuf1 = bbuf2; bbuf2 = tbuf; \ -} while (0) - -static int -or_wc_range_buf(BBuf* bbuf1, int not1, BBuf* bbuf2, int not2, BBuf** pbuf) -{ - int i, r; - WCINT n1, *data1; - WCINT from, to; - - *pbuf = (BBuf* )NULL; - if (IS_NULL(bbuf1) && IS_NULL(bbuf2)) { - if (not1 != 0 || not2 != 0) - return SET_ALL_MULTI_BYTE_RANGE(pbuf); - return 0; - } - - r = 0; - if (IS_NULL(bbuf2)) - SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2); - - if (IS_NULL(bbuf1)) { - if (not1 != 0) { - return SET_ALL_MULTI_BYTE_RANGE(pbuf); - } - else { - if (not2 == 0) { - return bbuf_clone(pbuf, bbuf2); - } - else { - return not_wc_range_buf(bbuf2, pbuf); - } - } - } - - if (not1 != 0) - SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2); - - data1 = (WCINT* )(bbuf1->p + SIZE_BITSET); - GET_WCINT(n1, data1); - data1++; - - if (not2 == 0 && not1 == 0) { /* 1 OR 2 */ - r = bbuf_clone(pbuf, bbuf2); - } - else if (not1 == 0) { /* 1 OR (not 2) */ - r = not_wc_range_buf(bbuf2, pbuf); - } - if (r != 0) return r; - - for (i = 0; i < n1; i++) { - from = data1[i*2]; - to = data1[i*2+1]; - r = add_wc_range_to_buf(pbuf, from, to, (UChar )0, (UChar )0); - if (r != 0) return r; - } - return 0; -} - -static int -and_wc_range1(BBuf** pbuf, WCINT from1, WCINT to1, WCINT* data, int n) -{ - int i, r; - WCINT from2, to2; - - for (i = 0; i < n; i++) { - from2 = data[i*2]; - to2 = data[i*2+1]; - if (from2 < from1) { - if (to2 < from1) continue; - else { - from1 = to2 + 1; - } - } - else if (from2 <= to1) { - if (to2 < to1) { - if (from1 <= from2 - 1) { - r = add_wc_range_to_buf(pbuf, from1, from2-1, (UChar )0, (UChar )0); - if (r != 0) return r; - } - from1 = to2 + 1; - } - else { - to1 = from2 - 1; - } - } - else { - from1 = from2; - } - if (from1 > to1) break; - } - if (from1 <= to1) { - r = add_wc_range_to_buf(pbuf, from1, to1, (UChar )0, (UChar )0); - if (r != 0) return r; - } - return 0; -} - -static int -and_wc_range_buf(BBuf* bbuf1, int not1, BBuf* bbuf2, int not2, BBuf** pbuf) -{ - int i, j, r; - WCINT n1, n2, *data1, *data2; - WCINT from, to, from1, to1, from2, to2; - - *pbuf = (BBuf* )NULL; - if (IS_NULL(bbuf1)) { - if (not1 != 0 && IS_NOT_NULL(bbuf2)) /* not1 != 0 -> not2 == 0 */ - return bbuf_clone(pbuf, bbuf2); - return 0; - } - else if (IS_NULL(bbuf2)) { - if (not2 != 0) - return bbuf_clone(pbuf, bbuf1); - return 0; - } - - if (not1 != 0) - SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2); - - data1 = (WCINT* )(bbuf1->p + SIZE_BITSET); - data2 = (WCINT* )(bbuf2->p + SIZE_BITSET); - GET_WCINT(n1, data1); - GET_WCINT(n2, data2); - data1++; - data2++; - - if (not2 == 0 && not1 == 0) { /* 1 AND 2 */ - for (i = 0; i < n1; i++) { - from1 = data1[i*2]; - to1 = data1[i*2+1]; - for (j = 0; j < n2; j++) { - from2 = data2[j*2]; - to2 = data2[j*2+1]; - if (from2 > to1) break; - if (to2 < from1) continue; - from = MAX(from1, from2); - to = MIN(to1, to2); - r = add_wc_range_to_buf(pbuf, from, to, (UChar )0, (UChar )0); - if (r != 0) return r; - } - } - } - else if (not1 == 0) { /* 1 AND (not 2) */ - for (i = 0; i < n1; i++) { - from1 = data1[i*2]; - to1 = data1[i*2+1]; - r = and_wc_range1(pbuf, from1, to1, data2, n2); - if (r != 0) return r; - } - } - - return 0; -} - -static int -and_cclass(CClassNode* dest, CClassNode* cc) -{ - int r, not1, not2; - BBuf *buf1, *buf2, *pbuf; - BitSetRef bsr1, bsr2; - BitSet bs1, bs2; - - not1 = dest->not; - bsr1 = dest->bs; - buf1 = dest->mbuf; - not2 = cc->not; - bsr2 = cc->bs; - buf2 = cc->mbuf; - - if (not1 != 0) { - bitset_invert_to(bsr1, bs1); - bsr1 = bs1; - } - if (not2 != 0) { - bitset_invert_to(bsr2, bs2); - bsr2 = bs2; - } - bitset_and(bsr1, bsr2); - if (bsr1 != dest->bs) { - bitset_copy(dest->bs, bsr1); - bsr1 = dest->bs; - } - if (not1 != 0) { - bitset_invert(dest->bs); - } - - if (not1 != 0 && not2 != 0) { - r = or_wc_range_buf(buf1, 0, buf2, 0, &pbuf); - } - else { - r = and_wc_range_buf(buf1, not1, buf2, not2, &pbuf); - if (r == 0 && not1 != 0) { - BBuf *tbuf; - r = not_wc_range_buf(pbuf, &tbuf); - if (r != 0) { - bbuf_free(pbuf); - return r; - } - bbuf_free(pbuf); - pbuf = tbuf; - } - } - if (r != 0) return r; - - dest->mbuf = pbuf; - bbuf_free(buf1); - if (IS_NOT_NULL(pbuf)) { - bitset_set_all((BitSetRef )pbuf->p); /* Sorry, but I'm tired. */ - } - return r; -} - -static int -or_cclass(CClassNode* dest, CClassNode* cc) -{ - int r, not1, not2; - BBuf *buf1, *buf2, *pbuf; - BitSetRef bsr1, bsr2; - BitSet bs1, bs2; - - not1 = dest->not; - bsr1 = dest->bs; - buf1 = dest->mbuf; - not2 = cc->not; - bsr2 = cc->bs; - buf2 = cc->mbuf; - - if (not1 != 0) { - bitset_invert_to(bsr1, bs1); - bsr1 = bs1; - } - if (not2 != 0) { - bitset_invert_to(bsr2, bs2); - bsr2 = bs2; - } - bitset_or(bsr1, bsr2); - if (bsr1 != dest->bs) { - bitset_copy(dest->bs, bsr1); - bsr1 = dest->bs; - } - if (not1 != 0) { - bitset_invert(dest->bs); - } - - if (not1 != 0 && not2 != 0) { - r = and_wc_range_buf(buf1, 0, buf2, 0, &pbuf); - } - else { - r = or_wc_range_buf(buf1, not1, buf2, not2, &pbuf); - if (r == 0 && not1 != 0) { - BBuf *tbuf; - r = not_wc_range_buf(pbuf, &tbuf); - if (r != 0) { - bbuf_free(pbuf); - return r; - } - bbuf_free(pbuf); - pbuf = tbuf; - } - } - if (r != 0) return r; - - dest->mbuf = pbuf; - bbuf_free(buf1); - if (IS_NOT_NULL(pbuf)) { - bitset_set_all((BitSetRef )pbuf->p); /* Sorry, but I'm tired. */ - } - return r; -} - -static int -conv_backslash_value(int c, ScanEnv* env) -{ - if (IS_SYNTAX_OP(env->syntax, REG_SYN_OP_ESC_CONTROL_CHAR)) { - switch (c) { - case 'n': return '\n'; - case 't': return '\t'; - case 'r': return '\r'; - case 'f': return '\f'; - case 'a': return '\007'; - case 'b': return '\010'; - case 'e': return '\033'; - case 'v': - if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_ESC_V_VTAB)) - return '\v'; - break; - - default: - break; - } - } - return c; -} - -static int -is_invalid_qualifier_target(Node* node) -{ - switch (NTYPE(node)) { - case N_ANCHOR: - return 1; - break; - - case N_EFFECT: - if (NEFFECT(node).type == EFFECT_OPTION) - return is_invalid_qualifier_target(NEFFECT(node).target); - break; - - case N_LIST: /* ex. (?:\G\A)* */ - do { - if (! is_invalid_qualifier_target(NCONS(node).left)) return 0; - } while (IS_NOT_NULL(node = NCONS(node).right)); - return 0; - break; - - case N_ALT: /* ex. (?:abc|\A)* */ - do { - if (is_invalid_qualifier_target(NCONS(node).left)) return 1; - } while (IS_NOT_NULL(node = NCONS(node).right)); - break; - - default: - break; - } - return 0; -} - -/* ?:0, *:1, +:2, ??:3, *?:4, +?:5 */ -static int -popular_qualifier_num(QualifierNode* qf) -{ - if (qf->greedy) { - if (qf->lower == 0) { - if (qf->upper == 1) return 0; - else if (IS_REPEAT_INFINITE(qf->upper)) return 1; - } - else if (qf->lower == 1) { - if (IS_REPEAT_INFINITE(qf->upper)) return 2; - } - } - else { - if (qf->lower == 0) { - if (qf->upper == 1) return 3; - else if (IS_REPEAT_INFINITE(qf->upper)) return 4; - } - else if (qf->lower == 1) { - if (IS_REPEAT_INFINITE(qf->upper)) return 5; - } - } - return -1; -} - -static void -reduce_nested_qualifier(Node* pnode, Node* cnode) -{ -#define NQ_ASIS 0 /* as is */ -#define NQ_DEL 1 /* delete parent */ -#define NQ_A 2 /* to '*' */ -#define NQ_AQ 3 /* to '*?' */ -#define NQ_QQ 4 /* to '??' */ -#define NQ_P_QQ 5 /* to '+)??' */ -#define NQ_PQ_Q 6 /* to '+?)?' */ - - static char reduces[][6] = { - {NQ_DEL, NQ_A, NQ_A, NQ_QQ, NQ_AQ, NQ_ASIS}, /* '?' */ - {NQ_DEL, NQ_DEL, NQ_DEL, NQ_P_QQ, NQ_P_QQ, NQ_DEL}, /* '*' */ - {NQ_A, NQ_A, NQ_DEL, NQ_ASIS, NQ_P_QQ, NQ_DEL}, /* '+' */ - {NQ_DEL, NQ_AQ, NQ_AQ, NQ_DEL, NQ_AQ, NQ_AQ}, /* '??' */ - {NQ_DEL, NQ_DEL, NQ_DEL, NQ_DEL, NQ_DEL, NQ_DEL}, /* '*?' */ - {NQ_ASIS, NQ_PQ_Q, NQ_DEL, NQ_AQ, NQ_AQ, NQ_DEL} /* '+?' */ - }; - - int pnum, cnum; - QualifierNode *p, *c; - - p = &(NQUALIFIER(pnode)); - c = &(NQUALIFIER(cnode)); - pnum = popular_qualifier_num(p); - cnum = popular_qualifier_num(c); - - switch(reduces[cnum][pnum]) { - case NQ_DEL: - *p = *c; - break; - case NQ_A: - p->target = c->target; - p->lower = 0; p->upper = REPEAT_INFINITE; p->greedy = 1; - break; - case NQ_AQ: - p->target = c->target; - p->lower = 0; p->upper = REPEAT_INFINITE; p->greedy = 0; - break; - case NQ_QQ: - p->target = c->target; - p->lower = 0; p->upper = 1; p->greedy = 0; - break; - case NQ_P_QQ: - p->target = cnode; - p->lower = 0; p->upper = 1; p->greedy = 0; - c->lower = 1; c->upper = REPEAT_INFINITE; c->greedy = 1; - return ; - break; - case NQ_PQ_Q: - p->target = cnode; - p->lower = 0; p->upper = 1; p->greedy = 1; - c->lower = 1; c->upper = REPEAT_INFINITE; c->greedy = 0; - return ; - break; - case NQ_ASIS: - p->target = cnode; - return ; - break; - } - - c->target = NULL_NODE; - regex_node_free(cnode); -} - - -enum TokenSyms { - TK_EOT = 0, /* end of token */ - TK_BYTE = 1, - TK_RAW_BYTE = 2, - TK_WC, - TK_ANYCHAR, - TK_CHAR_TYPE, - TK_BACKREF, - TK_CALL, - TK_ANCHOR, - TK_OP_REPEAT, - TK_INTERVAL, - TK_ALT, - TK_SUBEXP_OPEN, - TK_SUBEXP_CLOSE, - TK_CC_OPEN, - TK_QUOTE_OPEN, - /* in cc */ - TK_CC_CLOSE, - TK_CC_RANGE, - TK_POSIX_BRACKET_OPEN, - TK_CC_AND, /* && */ - TK_CC_CC_OPEN /* [ */ -}; - -typedef struct { - enum TokenSyms type; - int escaped; - int base; /* is number: 8, 16 (used in [....]) */ - UChar* backp; - union { - int c; - WCINT wc; - int anchor; - int subtype; - struct { - int lower; - int upper; - int greedy; - int possessive; - } repeat; - struct { - int num; - int ref1; - int* refs; - } backref; - struct { - UChar* name; - UChar* name_end; - } call; - } u; -} RegToken; - - -static int -fetch_range_qualifier(UChar** src, UChar* end, RegToken* tok, ScanEnv* env) -{ - int low, up, syn_allow; - int c; - UChar* p = *src; - - syn_allow = IS_SYNTAX_BV(env->syntax, REG_SYN_ALLOW_INVALID_INTERVAL); - - if (PEND) { - if (syn_allow) - return 1; /* "....{" : OK! */ - else - return REGERR_END_PATTERN_AT_LEFT_BRACE; /* "....{" syntax error */ - } - - if (! syn_allow) { - c = PPEEK; - if (c == ')' || c == '(' || c == '|') { - return REGERR_END_PATTERN_AT_LEFT_BRACE; - } - } - - low = regex_scan_unsigned_number(&p, end, env->enc); - if (low < 0) return REGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; - if (low > REG_MAX_REPEAT_NUM) - return REGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; - - if (p == *src) goto invalid; /* can't read low */ - - if (PEND) goto invalid; - PFETCH(c); - if (c == ',') { - UChar* prev = p; - up = regex_scan_unsigned_number(&p, end, env->enc); - if (up < 0) return REGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; - if (up > REG_MAX_REPEAT_NUM) - return REGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; - - if (p == prev) up = REPEAT_INFINITE; /* {n,} : {n,infinite} */ - } - else { - PUNFETCH; - up = low; /* {n} : exact n times */ - } - - if (PEND) goto invalid; - PFETCH(c); - if (IS_SYNTAX_OP(env->syntax, REG_SYN_OP_ESC_INTERVAL)) { - if (c != '\\') goto invalid; - PFETCH(c); - } - if (c != '}') goto invalid; - - if (!IS_REPEAT_INFINITE(up) && low > up) { - return REGERR_UPPER_SMALLER_THAN_LOWER_IN_REPEAT_RANGE; - } - - tok->type = TK_INTERVAL; - tok->u.repeat.lower = low; - tok->u.repeat.upper = up; - *src = p; - return 0; - - invalid: - if (syn_allow) - return 1; /* OK */ - else - return REGERR_INVALID_REPEAT_RANGE_PATTERN; -} - -/* \M-, \C-, \c, or \... */ -static int -fetch_escaped_value(UChar** src, UChar* end, ScanEnv* env) -{ - int c; - UChar* p = *src; - - if (PEND) return REGERR_END_PATTERN_AT_BACKSLASH; - - PFETCH(c); - switch (c) { - case 'M': - if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_ESC_M_BAR_META)) { - if (PEND) return REGERR_END_PATTERN_AT_META; - PFETCH(c); - if (c != '-') return REGERR_META_CODE_SYNTAX; - if (PEND) return REGERR_END_PATTERN_AT_META; - PFETCH(c); - if (c == '\\') { - c = fetch_escaped_value(&p, end, env); - if (c < 0) return c; - } - c = ((c & 0xff) | 0x80); - } - else - goto backslash; - break; - - case 'C': - if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_ESC_CAPITAL_C_BAR_CONTROL)) { - if (PEND) return REGERR_END_PATTERN_AT_CONTROL; - PFETCH(c); - if (c != '-') return REGERR_CONTROL_CODE_SYNTAX; - goto control; - } - else - goto backslash; - - case 'c': - if (IS_SYNTAX_OP(env->syntax, REG_SYN_OP_ESC_C_CONTROL)) { - control: - if (PEND) return REGERR_END_PATTERN_AT_CONTROL; - PFETCH(c); - if (c == '\\') { - c = fetch_escaped_value(&p, end, env); - if (c < 0) return c; - } - else if (c == '?') - c = 0177; - else - c &= 0x9f; - break; - } - /* fall through */ - - default: - { - backslash: - c = conv_backslash_value(c, env); - } - break; - } - - *src = p; - return c; -} - -static int fetch_token(RegToken* tok, UChar** src, UChar* end, ScanEnv* env); - -#ifdef USE_NAMED_SUBEXP -static int -fetch_name(UChar** src, UChar* end, UChar** name_end, ScanEnv* env) -{ - int len; - int c = 0; - UChar *p = *src; - - while (!PEND) { - *name_end = p; - PFETCH(c); - if (c == '>') break; - else if (c == ')' || c == '\\' || c == '\0') - return REGERR_INVALID_SUBEXP_NAME; - - len = mblen(env->enc, c); - while (!PEND && len-- > 1) { - PFETCH(c); - } - } - if (c != '>') return REGERR_INVALID_SUBEXP_NAME; - *src = p; - return 0; -} -#endif - -static void -CC_ESC_WARN(ScanEnv* env, UChar *c) -{ -#ifdef WARNING - if (IS_SYNTAX_BV(env->syntax, REG_SYN_WARN_FOR_CC_OP_NOT_ESCAPED) && - IS_SYNTAX_BV(env->syntax, REG_SYN_ESCAPE_IN_CC)) { - char buf[WARN_BUFSIZE]; - regex_snprintf_with_pattern(buf, WARN_BUFSIZE, env->enc, - env->pattern, env->pattern_end, - "character class has '%s' without escape", c); - WARNING(buf); - } -#endif -} - -static void -CCEND_ESC_WARN(ScanEnv* env, UChar* c) -{ -#ifdef WARNING - if (IS_SYNTAX_BV((env)->syntax, REG_SYN_WARN_FOR_CC_OP_NOT_ESCAPED)) { - char buf[WARN_BUFSIZE]; - regex_snprintf_with_pattern(buf, WARN_BUFSIZE, (env)->enc, - (env)->pattern, (env)->pattern_end, - "regular expression has '%s' without escape", c); - WARNING(buf); - } -#endif -} - -static UChar* -find_str_position(WCINT s[], int n, UChar* from, UChar* to, UChar **next, - RegCharEncoding enc) -{ - int i; - WCINT x; - UChar *q; - UChar *p = from; - - while (p < to) { - x = mb2wc(p, to, enc); - q = p + mblen(enc, *p); - if (x == s[0]) { - for (i = 1; i < n && q < to; i++) { - x = mb2wc(q, to, enc); - if (x != s[i]) break; - q += mblen(enc, *q); - } - if (i >= n) { - if (IS_NOT_NULL(next)) - *next = q; - return p; - } - } - p = q; - } - return NULL_UCHARP; -} - -static int -str_exist_check_with_esc(WCINT s[], int n, UChar* from, UChar* to, - WCINT bad, RegCharEncoding enc) -{ - int i, in_esc; - WCINT x; - UChar *q; - UChar *p = from; - - in_esc = 0; - while (p < to) { - if (in_esc) { - in_esc = 0; - p += mblen(enc, *p); - } - else { - x = mb2wc(p, to, enc); - q = p + mblen(enc, *p); - if (x == s[0]) { - for (i = 1; i < n && q < to; i++) { - x = mb2wc(q, to, enc); - if (x != s[i]) break; - q += mblen(enc, *q); - } - if (i >= n) return 1; - p += mblen(enc, *p); - } - else { - x = mb2wc(p, to, enc); - if (x == bad) return 0; - else if (x == '\\') in_esc = 1; - p = q; - } - } - } - return 0; -} - -static int -fetch_token_in_cc(RegToken* tok, UChar** src, UChar* end, ScanEnv* env) -{ - int c, num; - RegSyntaxType* syn = env->syntax; - UChar* prev; - UChar* p = *src; - - if (PEND) { - tok->type = TK_EOT; - return tok->type; - } - - PFETCH(c); - tok->type = TK_BYTE; - tok->base = 0; - tok->u.c = c; - if (c == ']') { - tok->type = TK_CC_CLOSE; - } - else if (c == '-') { - tok->type = TK_CC_RANGE; - } - else if (c == '\\') { - if (! IS_SYNTAX_BV(syn, REG_SYN_ESCAPE_IN_CC)) - goto end; - - if (PEND) return REGERR_END_PATTERN_AT_BACKSLASH; - - PFETCH(c); - tok->escaped = 1; - tok->u.c = c; - switch (c) { - case 'w': - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_WORD; - break; - case 'W': - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_NOT_WORD; - break; - case 'd': - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_DIGIT; - break; - case 'D': - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_NOT_DIGIT; - break; - case 's': - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_WHITE_SPACE; - break; - case 'S': - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_NOT_WHITE_SPACE; - break; - - case 'x': - if (PEND) break; - - prev = p; - if (PPEEK == '{' && IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_X_BRACE_HEX8)) { - PINC; - num = scan_unsigned_hexadecimal_number(&p, end, 8, env->enc); - if (num < 0) return REGERR_TOO_BIG_WIDE_CHAR_VALUE; - if (!PEND && IS_XDIGIT(*p) && p - prev >= 9) - return REGERR_TOO_LONG_WIDE_CHAR_VALUE; - - if (p > prev + 1 && !PEND && PPEEK == '}') { - PINC; - tok->type = TK_WC; - tok->base = 16; - tok->u.wc = (WCINT )num; - } - else { - /* can't read nothing or invalid format */ - p = prev; - } - } - else if (IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_X_HEX2)) { - num = scan_unsigned_hexadecimal_number(&p, end, 2, env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (p == prev) { /* can't read nothing. */ - num = 0; /* but, it's not error */ - } - tok->type = TK_RAW_BYTE; - tok->base = 16; - tok->u.c = num; - } - break; - - case 'u': - if (PEND) break; - - prev = p; - if (IS_SYNTAX_OP2(syn, REG_SYN_OP2_ESC_U_HEX4)) { - num = scan_unsigned_hexadecimal_number(&p, end, 4, env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (p == prev) { /* can't read nothing. */ - num = 0; /* but, it's not error */ - } - tok->type = TK_RAW_BYTE; - tok->base = 16; - tok->u.c = num; - } - break; - - case '0': - case '1': case '2': case '3': case '4': case '5': case '6': case '7': - if (IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_OCTAL3)) { - PUNFETCH; - prev = p; - num = scan_unsigned_octal_number(&p, end, 3, env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (p == prev) { /* can't read nothing. */ - num = 0; /* but, it's not error */ - } - tok->type = TK_RAW_BYTE; - tok->base = 8; - tok->u.c = num; - } - break; - - default: - PUNFETCH; - num = fetch_escaped_value(&p, end, env); - if (num < 0) return num; - if (tok->u.c != num) { - tok->u.c = num; - tok->type = TK_RAW_BYTE; - } - break; - } - } - else if (c == '[') { - if (IS_SYNTAX_OP(syn, REG_SYN_OP_POSIX_BRACKET) && PPEEK == ':') { - WCINT send[] = { (WCINT )':', (WCINT )']' }; - tok->backp = p; /* point at '[' is readed */ - PINC; - if (str_exist_check_with_esc(send, 2, p, end, (WCINT )']', env->enc)) { - tok->type = TK_POSIX_BRACKET_OPEN; - } - else { - PUNFETCH; - goto cc_in_cc; - } - } - else { - cc_in_cc: - if (IS_SYNTAX_OP2(syn, REG_SYN_OP2_CCLASS_SET)) { - tok->type = TK_CC_CC_OPEN; - } - else { - CC_ESC_WARN(env, "["); - } - } - } - else if (c == '&') { - if (IS_SYNTAX_OP2(syn, REG_SYN_OP2_CCLASS_SET) && !PEND && PPEEK == '&') { - PINC; - tok->type = TK_CC_AND; - } - } - - end: - *src = p; - return tok->type; -} - -static int -fetch_token(RegToken* tok, UChar** src, UChar* end, ScanEnv* env) -{ - int r, c, num; - RegSyntaxType* syn = env->syntax; - UChar* prev; - UChar* p = *src; - - start: - if (PEND) { - tok->type = TK_EOT; - return tok->type; - } - - tok->type = TK_BYTE; - tok->base = 0; - PFETCH(c); - if (c == '\\') { - if (PEND) return REGERR_END_PATTERN_AT_BACKSLASH; - - PFETCH(c); - tok->u.c = c; - tok->escaped = 1; - switch (c) { - case '*': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_0INF)) break; - tok->type = TK_OP_REPEAT; - tok->u.repeat.lower = 0; - tok->u.repeat.upper = REPEAT_INFINITE; - goto greedy_check; - break; - - case '+': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_1INF)) break; - tok->type = TK_OP_REPEAT; - tok->u.repeat.lower = 1; - tok->u.repeat.upper = REPEAT_INFINITE; - goto greedy_check; - break; - - case '?': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_01)) break; - tok->type = TK_OP_REPEAT; - tok->u.repeat.lower = 0; - tok->u.repeat.upper = 1; - greedy_check: - if (!PEND && PPEEK == '?' && IS_SYNTAX_OP(syn, REG_SYN_OP_NON_GREEDY)) { - PFETCH(c); - tok->u.repeat.greedy = 0; - tok->u.repeat.possessive = 0; - } - else if (!PEND && PPEEK == '+' && - ((IS_SYNTAX_OP2(syn, REG_SYN_OP2_POSSESSIVE_REPEAT) && - tok->type != TK_INTERVAL) || - (IS_SYNTAX_OP2(syn, REG_SYN_OP2_POSSESSIVE_INTERVAL) && - tok->type == TK_INTERVAL))) { - PFETCH(c); - tok->u.repeat.greedy = 1; - tok->u.repeat.possessive = 1; - } - else { - tok->u.repeat.greedy = 1; - tok->u.repeat.possessive = 0; - } - break; - - case '{': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_INTERVAL)) break; - tok->backp = p; - r = fetch_range_qualifier(&p, end, tok, env); - if (r < 0) return r; /* error */ - if (r > 0) { - /* normal char */ - } - else - goto greedy_check; - break; - - case '|': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_ALT)) break; - tok->type = TK_ALT; - break; - - case '(': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_SUBEXP)) break; - tok->type = TK_SUBEXP_OPEN; - break; - - case ')': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_SUBEXP)) break; - tok->type = TK_SUBEXP_CLOSE; - break; - - case 'w': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WORD)) break; - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_WORD; - break; - - case 'W': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WORD)) break; - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_NOT_WORD; - break; - - case 'b': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WORD_BOUND)) break; - tok->type = TK_ANCHOR; - tok->u.anchor = ANCHOR_WORD_BOUND; - break; - - case 'B': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WORD_BOUND)) break; - tok->type = TK_ANCHOR; - tok->u.anchor = ANCHOR_NOT_WORD_BOUND; - break; - -#ifdef USE_WORD_BEGIN_END - case '<': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WORD_BEGIN_END)) break; - tok->type = TK_ANCHOR; - tok->u.anchor = ANCHOR_WORD_BEGIN; - break; - - case '>': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WORD_BEGIN_END)) break; - tok->type = TK_ANCHOR; - tok->u.anchor = ANCHOR_WORD_END; - break; -#endif - - case 's': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WHITE_SPACE)) break; - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_WHITE_SPACE; - break; - - case 'S': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_WHITE_SPACE)) break; - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_NOT_WHITE_SPACE; - break; - - case 'd': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_DIGIT)) break; - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_DIGIT; - break; - - case 'D': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_DIGIT)) break; - tok->type = TK_CHAR_TYPE; - tok->u.subtype = CTYPE_NOT_DIGIT; - break; - - case 'A': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_BUF_ANCHOR)) break; - begin_buf: - tok->type = TK_ANCHOR; - tok->u.subtype = ANCHOR_BEGIN_BUF; - break; - - case 'Z': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_BUF_ANCHOR)) break; - tok->type = TK_ANCHOR; - tok->u.subtype = ANCHOR_SEMI_END_BUF; - break; - - case 'z': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_BUF_ANCHOR)) break; - end_buf: - tok->type = TK_ANCHOR; - tok->u.subtype = ANCHOR_END_BUF; - break; - - case 'G': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_BUF_ANCHOR)) break; - tok->type = TK_ANCHOR; - tok->u.subtype = ANCHOR_BEGIN_POSITION; - break; - - case '`': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_GNU_BUF_ANCHOR)) break; - goto begin_buf; - break; - - case '\'': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_GNU_BUF_ANCHOR)) break; - goto end_buf; - break; - - case 'x': - if (PEND) break; - - prev = p; - if (PPEEK == '{' && IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_X_BRACE_HEX8)) { - PINC; - num = scan_unsigned_hexadecimal_number(&p, end, 8, env->enc); - if (num < 0) return REGERR_TOO_BIG_WIDE_CHAR_VALUE; - if (!PEND && IS_XDIGIT(*p) && p - prev >= 9) - return REGERR_TOO_LONG_WIDE_CHAR_VALUE; - - if (p > prev + 1 && !PEND && PPEEK == '}') { - PINC; - tok->type = TK_WC; - tok->u.wc = (WCINT )num; - } - else { - /* can't read nothing or invalid format */ - p = prev; - } - } - else if (IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_X_HEX2)) { - num = scan_unsigned_hexadecimal_number(&p, end, 2, env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (p == prev) { /* can't read nothing. */ - num = 0; /* but, it's not error */ - } - tok->type = TK_RAW_BYTE; - tok->base = 16; - tok->u.c = num; - } - break; - - case 'u': - if (PEND) break; - - prev = p; - if (IS_SYNTAX_OP2(syn, REG_SYN_OP2_ESC_U_HEX4)) { - num = scan_unsigned_hexadecimal_number(&p, end, 4, env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (p == prev) { /* can't read nothing. */ - num = 0; /* but, it's not error */ - } - tok->type = TK_RAW_BYTE; - tok->base = 16; - tok->u.c = num; - } - break; - - case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - PUNFETCH; - prev = p; - num = regex_scan_unsigned_number(&p, end, env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (num > REG_MAX_BACKREF_NUM) return REGERR_TOO_BIG_BACKREF_NUMBER; - - if (IS_SYNTAX_OP(syn, REG_SYN_OP_BACK_REF) && - (num <= env->num_mem || num <= 9)) { /* This spec. from GNU regex */ - if (IS_SYNTAX_BV(syn, REG_SYN_STRICT_CHECK_BACKREF)) { - if (num > env->num_mem || IS_NULL(SCANENV_MEM_NODES(env)[num])) - return REGERR_INVALID_BACKREF; - } - - tok->type = TK_BACKREF; - tok->u.backref.num = 1; - tok->u.backref.ref1 = num; - break; - } - else if (c == '8' || c == '9') { - /* normal char */ - p = prev; PINC; - break; - } - - p = prev; - /* fall through */ - case '0': - if (IS_SYNTAX_OP(syn, REG_SYN_OP_ESC_OCTAL3)) { - prev = p; - num = scan_unsigned_octal_number(&p, end, (c == '0' ? 2:3), env->enc); - if (num < 0) return REGERR_TOO_BIG_NUMBER; - if (p == prev) { /* can't read nothing. */ - num = 0; /* but, it's not error */ - } - tok->type = TK_RAW_BYTE; - tok->base = 8; - tok->u.c = num; - } - else if (c != '0') { - PINC; - } - break; - -#ifdef USE_NAMED_SUBEXP - case 'k': - if (IS_SYNTAX_OP2(syn, REG_SYN_OP2_NAMED_SUBEXP)) { - PFETCH(c); - if (c == '<') { - UChar* name_end; - int* backs; - - prev = p; - r = fetch_name(&p, end, &name_end, env); - if (r < 0) return r; - num = regex_name_to_group_numbers(env->reg, prev, name_end, &backs); - if (num <= 0) { - regex_scan_env_set_error_string(env, - REGERR_UNDEFINED_NAME_REFERENCE, prev, name_end); - return REGERR_UNDEFINED_NAME_REFERENCE; - } - if (IS_SYNTAX_BV(syn, REG_SYN_STRICT_CHECK_BACKREF)) { - int i; - for (i = 0; i < num; i++) { - if (backs[i] > env->num_mem || - IS_NULL(SCANENV_MEM_NODES(env)[backs[i]])) - return REGERR_INVALID_BACKREF; - } - } - - tok->type = TK_BACKREF; - if (num == 1) { - tok->u.backref.num = 1; - tok->u.backref.ref1 = backs[0]; - } - else { - tok->u.backref.num = num; - tok->u.backref.refs = backs; - } - } - else - PUNFETCH; - } - break; -#endif - -#ifdef USE_SUBEXP_CALL - case 'g': - if (IS_SYNTAX_OP2(syn, REG_SYN_OP2_SUBEXP_CALL)) { - PFETCH(c); - if (c == '<') { - UChar* name_end; - - prev = p; - r = fetch_name(&p, end, &name_end, env); - if (r < 0) return r; - - tok->type = TK_CALL; - tok->u.call.name = prev; - tok->u.call.name_end = name_end; - } - else - PUNFETCH; - } - break; -#endif - - case 'Q': - if (IS_SYNTAX_OP(syn, REG_SYN_OP_QUOTE)) { - tok->type = TK_QUOTE_OPEN; - } - break; - - default: - PUNFETCH; - num = fetch_escaped_value(&p, end, env); - if (num < 0) return num; - /* set_raw: */ - if (tok->u.c != num) { - tok->type = TK_RAW_BYTE; - tok->u.c = num; - } - break; - } - } - else { - tok->u.c = c; - tok->escaped = 0; - - switch (c) { - case '.': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ANYCHAR)) break; - tok->type = TK_ANYCHAR; - break; - - case '*': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_0INF)) break; - tok->type = TK_OP_REPEAT; - tok->u.repeat.lower = 0; - tok->u.repeat.upper = REPEAT_INFINITE; - goto greedy_check; - break; - - case '+': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_1INF)) break; - tok->type = TK_OP_REPEAT; - tok->u.repeat.lower = 1; - tok->u.repeat.upper = REPEAT_INFINITE; - goto greedy_check; - break; - - case '?': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_01)) break; - tok->type = TK_OP_REPEAT; - tok->u.repeat.lower = 0; - tok->u.repeat.upper = 1; - goto greedy_check; - break; - - case '{': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_INTERVAL)) break; - tok->backp = p; - r = fetch_range_qualifier(&p, end, tok, env); - if (r < 0) return r; /* error */ - if (r > 0) { - /* normal char */ - } - else - goto greedy_check; - break; - - case '|': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_ALT)) break; - tok->type = TK_ALT; - break; - - case '(': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_SUBEXP)) break; - tok->type = TK_SUBEXP_OPEN; - break; - - case ')': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_SUBEXP)) break; - tok->type = TK_SUBEXP_CLOSE; - break; - - case '^': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_LINE_ANCHOR)) break; - tok->type = TK_ANCHOR; - tok->u.subtype = (IS_SINGLELINE(env->option) - ? ANCHOR_BEGIN_BUF : ANCHOR_BEGIN_LINE); - break; - - case '$': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_LINE_ANCHOR)) break; - tok->type = TK_ANCHOR; - tok->u.subtype = (IS_SINGLELINE(env->option) - ? ANCHOR_END_BUF : ANCHOR_END_LINE); - break; - - case '[': - if (! IS_SYNTAX_OP(syn, REG_SYN_OP_CC)) break; - tok->type = TK_CC_OPEN; - break; - - case ']': - if (*src > env->pattern) /* /].../ is allowed. */ - CCEND_ESC_WARN(env, "]"); - break; - - case '#': - if (IS_EXTEND(env->option)) { - while (!PEND) { - PFETCH(c); - if (IS_NEWLINE(c)) - break; - } - goto start; - break; - } - break; - - case ' ': case '\t': case '\n': case '\r': case '\f': - if (IS_EXTEND(env->option)) - goto start; - break; - - default: - break; - } - } - - *src = p; - return tok->type; -} - -static void -bitset_by_pred_func(BitSetRef bs, int (*pf)(RegCharEncoding, UChar), - RegCharEncoding code, int not) -{ - int c; - - if (not) { - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (! pf(code, (UChar )c)) BITSET_SET_BIT(bs, c); - } - } - else { - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (pf(code, (UChar )c)) BITSET_SET_BIT(bs, c); - } - } -} - -typedef struct { - UChar *name; - int (*pf)(RegCharEncoding, UChar); - short int len; -} PosixBracketEntryType; - -static int -parse_posix_bracket(CClassNode* cc, UChar** src, UChar* end, ScanEnv* env) -{ -#define POSIX_BRACKET_CHECK_LIMIT_LENGTH 20 -#define POSIX_BRACKET_NAME_MAX_LEN 6 - - static PosixBracketEntryType PBS[] = { - { "alnum", is_code_alnum, 5 }, - { "alpha", is_code_alpha, 5 }, - { "blank", is_code_blank, 5 }, - { "cntrl", is_code_cntrl, 5 }, - { "digit", is_code_digit, 5 }, - { "graph", is_code_graph, 5 }, - { "lower", is_code_lower, 5 }, - { "print", is_code_print, 5 }, - { "punct", is_code_punct, 5 }, - { "space", is_code_space, 5 }, - { "upper", is_code_upper, 5 }, - { "xdigit", is_code_xdigit, 6 }, - { "ascii", is_code_ascii, 5 }, /* I don't know origin. Perl? */ - { (UChar* )NULL, is_code_alnum, 0 } - }; - - PosixBracketEntryType *pb; - int not, i, c; - UChar *p = *src; - - if (PPEEK == '^') { - PINC; - not = 1; - } - else - not = 0; - - if (end - p < POSIX_BRACKET_NAME_MAX_LEN + 1) - goto not_posix_bracket; - - for (pb = PBS; IS_NOT_NULL(pb->name); pb++) { - if (k_strncmp(p, pb->name, pb->len) == 0) { - p += pb->len; - if (end - p < 2 || *p != ':' || *(p+1) != ']') - return REGERR_INVALID_POSIX_BRACKET_TYPE; - - bitset_by_pred_func(cc->bs, pb->pf, env->enc, not); - PINC; PINC; - *src = p; - return 0; - } - } - - not_posix_bracket: - c = 0; - i = 0; - while (!PEND && ((c = PPEEK) != ':') && c != ']') { - PINC; - if (++i > POSIX_BRACKET_CHECK_LIMIT_LENGTH) break; - } - if (c == ':' && !PEND) { - PINC; - if (!PEND) { - PFETCH(c); - if (c == ']') - return REGERR_INVALID_POSIX_BRACKET_TYPE; - } - } - - return 1; /* 1: is not POSIX bracket, but no error. */ -} - - -enum CCSTATE { - CCS_VALUE, - CCS_RANGE, - CCS_COMPLETE, - CCS_START -}; - -enum CCVALTYPE { - CCV_SB, - CCV_WC, - CCV_CLASS -}; - -static int -next_state_class(CClassNode* cc, RegToken* tok, WCINT* vs, - enum CCVALTYPE* type, enum CCSTATE* state, ScanEnv* env) -{ - int r, c; - - if (*state == CCS_RANGE) - return REGERR_CHAR_CLASS_VALUE_AT_END_OF_RANGE; - - if (*state == CCS_VALUE && *type != CCV_CLASS) { - if (*type == CCV_SB) - BITSET_SET_BIT(cc->bs, (int )(*vs)); - else if (*type == CCV_WC) { - r = add_wc_range(&(cc->mbuf), env, *vs, *vs); - if (r < 0) return r; - } - } - - if (tok->type == TK_CHAR_TYPE) { - switch (tok->u.subtype) { - case CTYPE_WORD: - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (IS_CODE_WORD(env->enc, c)) BITSET_SET_BIT(cc->bs, c); - } - ADD_ALL_MULTI_BYTE_RANGE(env->enc, cc->mbuf); - break; - case CTYPE_NOT_WORD: - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (! IS_CODE_WORD(env->enc, c)) BITSET_SET_BIT(cc->bs, c); - } - break; - case CTYPE_WHITE_SPACE: - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (IS_CODE_SPACE(env->enc, c)) BITSET_SET_BIT(cc->bs, c); - } - break; - case CTYPE_NOT_WHITE_SPACE: - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (! IS_CODE_SPACE(env->enc, c)) BITSET_SET_BIT(cc->bs, c); - } - ADD_ALL_MULTI_BYTE_RANGE(env->enc, cc->mbuf); - break; - case CTYPE_DIGIT: - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (IS_CODE_DIGIT(env->enc, c)) BITSET_SET_BIT(cc->bs, c); - } - break; - case CTYPE_NOT_DIGIT: - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (! IS_CODE_DIGIT(env->enc, c)) BITSET_SET_BIT(cc->bs, c); - } - ADD_ALL_MULTI_BYTE_RANGE(env->enc, cc->mbuf); - break; - default: - return REGERR_PARSER_BUG; - break; - } - } - else { /* TK_POSIX_BRACKET_OPEN */ - /* nothing */ - } - - *state = CCS_VALUE; - *type = CCV_CLASS; - return 0; -} - -static int -next_state_val(CClassNode* cc, WCINT *vs, WCINT v, int* vs_israw, int v_israw, - enum CCVALTYPE intype, enum CCVALTYPE* type, - enum CCSTATE* state, ScanEnv* env) -{ - int r; - - switch (*state) { - case CCS_VALUE: - if (*type == CCV_SB) - BITSET_SET_BIT(cc->bs, (int )(*vs)); - else if (*type == CCV_WC) { - r = add_wc_range(&(cc->mbuf), env, *vs, *vs); - if (r < 0) return r; - } - break; - - case CCS_RANGE: - if (intype == *type) { - if (intype == CCV_SB) { - if (IS_IGNORECASE(env->option) && (*vs_israw == 0 && v_israw == 0)) { - int low, high; - - low = TOLOWER(env->enc, *vs); - high = TOLOWER(env->enc, v); - if (low > high) { - if (IS_SYNTAX_BV(env->syntax, REG_SYN_ALLOW_EMPTY_RANGE_IN_CC)) - goto ccs_range_end; - else - return REGERR_EMPTY_RANGE_IN_CHAR_CLASS; - } - - if (low < 'A' && high >= 'a' && high <= 'z') { - bitset_set_range(cc->bs, low, (int )'A' - 1); - bitset_set_range(cc->bs, (int )'a', high); - } - else if (high > 'z' && low >= 'a' && low <= 'z') { - bitset_set_range(cc->bs, low, (int )'z'); - bitset_set_range(cc->bs, (int )'z' + 1, high); - } - else { - bitset_set_range(cc->bs, low, high); - } - } - else { - if (*vs > v) { - if (IS_SYNTAX_BV(env->syntax, REG_SYN_ALLOW_EMPTY_RANGE_IN_CC)) - goto ccs_range_end; - else - return REGERR_EMPTY_RANGE_IN_CHAR_CLASS; - } - bitset_set_range(cc->bs, (int )*vs, (int )v); - } - } - else { - r = add_wc_range(&(cc->mbuf), env, *vs, v); - if (r < 0) return r; - } - } - else { -#ifndef REG_RUBY_M17N - if (env->enc == REGCODE_UTF8 && intype == CCV_WC && *type == CCV_SB) { - bitset_set_range(cc->bs, (int )*vs, 0x7f); - r = add_wc_range(&(cc->mbuf), env, (WCINT )0x80, v); - if (r < 0) return r; - } - else -#endif - return REGERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE; - } - ccs_range_end: - *state = CCS_COMPLETE; - break; - - case CCS_COMPLETE: - case CCS_START: - *state = CCS_VALUE; - break; - - default: - break; - } - - *vs_israw = v_israw; - *vs = v; - *type = intype; - return 0; -} - -static int -char_exist_check(UChar c, UChar* from, UChar* to, int ignore_escaped, - RegCharEncoding enc) -{ - int in_esc; - UChar* p = from; - - in_esc = 0; - while (p < to) { - if (ignore_escaped && in_esc) { - in_esc = 0; - } - else { - if (*p == c) return 1; - if (*p == '\\') in_esc = 1; - } - p += mblen(enc, *p); - } - return 0; -} - -static int -parse_char_class(Node** np, RegToken* tok, UChar** src, UChar* end, - ScanEnv* env) -{ - int r, neg, len, fetched, and_start; - WCINT v, vs; - UChar *p; - Node* node; - CClassNode *cc, *prev_cc; - CClassNode work_cc; - - enum CCSTATE state; - enum CCVALTYPE val_type, in_type; - int val_israw, in_israw; - - *np = NULL_NODE; - r = fetch_token_in_cc(tok, src, end, env); - if (r == TK_BYTE && tok->u.c == '^') { - neg = 1; - r = fetch_token_in_cc(tok, src, end, env); - } - else { - neg = 0; - } - - if (r < 0) return r; - if (r == TK_CC_CLOSE) { - if (! char_exist_check(']', *src, env->pattern_end, 1, env->enc)) - return REGERR_EMPTY_CHAR_CLASS; - - CC_ESC_WARN(env, "]"); - r = tok->type = TK_BYTE; /* allow []...] */ - } - - *np = node = node_new_cclass(); - CHECK_NULL_RETURN_VAL(node, REGERR_MEMORY); - cc = &(NCCLASS(node)); - prev_cc = (CClassNode* )NULL; - - and_start = 0; - state = CCS_START; - p = *src; - while (r != TK_CC_CLOSE) { - fetched = 0; - switch (r) { - case TK_BYTE: - len = mblen(env->enc, tok->u.c); - if (len > 1) { - PUNFETCH; - v = MB2WC(p, end, env->enc); - p += len; - } - else { - sb_char: - v = (WCINT )tok->u.c; - } - in_israw = 0; - goto val_entry; - break; - - case TK_RAW_BYTE: - len = mblen(env->enc, tok->u.c); - if (len > 1 && tok->base != 0) { /* tok->base != 0 : octal or hexadec. */ - UChar buf[WC2MB_MAX_BUFLEN]; - UChar* bufp = buf; - UChar* bufe = buf + WC2MB_MAX_BUFLEN; - int i, base = tok->base; - - if (len > WC2MB_MAX_BUFLEN) { - bufp = (UChar* )xmalloc(len); - if (IS_NULL(bufp)) { - r = REGERR_MEMORY; - goto err; - } - bufe = bufp + len; - } - bufp[0] = tok->u.c; - for (i = 1; i < len; i++) { - r = fetch_token_in_cc(tok, &p, end, env); - if (r < 0) goto raw_byte_err; - if (r != TK_RAW_BYTE || tok->base != base) break; - bufp[i] = tok->u.c; - } - if (i < len) { - r = REGERR_TOO_SHORT_MULTI_BYTE_STRING; - raw_byte_err: - if (bufp != buf) xfree(bufp); - goto err; - } - v = MB2WC(bufp, bufe, env->enc); - fetched = 1; - if (bufp != buf) xfree(bufp); - } - else { - v = (WCINT )tok->u.c; - } - in_israw = 1; - goto val_entry; - break; - - case TK_WC: - v = tok->u.wc; - in_israw = 1; - val_entry: - in_type = (v < SINGLE_BYTE_SIZE ? CCV_SB : CCV_WC); - r = next_state_val(cc, &vs, v, &val_israw, in_israw, in_type, &val_type, - &state, env); - if (r != 0) goto err; - break; - - case TK_POSIX_BRACKET_OPEN: - r = parse_posix_bracket(cc, &p, end, env); - if (r < 0) goto err; - if (r == 1) { /* is not POSIX bracket */ - CC_ESC_WARN(env, "["); - p = tok->backp; - v = (WCINT )tok->u.c; - in_israw = 0; - goto val_entry; - } - /* POSIX bracket fall */ - case TK_CHAR_TYPE: - r = next_state_class(cc, tok, &vs, &val_type, &state, env); - if (r != 0) goto err; - break; - - case TK_CC_RANGE: - if (state == CCS_VALUE) { - r = fetch_token_in_cc(tok, &p, end, env); - if (r < 0) goto err; - fetched = 1; - if (r == TK_CC_CLOSE) { /* allow [x-] */ - range_end_val: - v = (WCINT )'-'; - in_israw = 0; - goto val_entry; - } - else if (r == TK_CC_AND) { - CC_ESC_WARN(env, "-"); - goto range_end_val; - } - state = CCS_RANGE; - } - else if (state == CCS_START) { - /* [-xa] is allowed */ - v = (WCINT )tok->u.c; - in_israw = 0; - - r = fetch_token_in_cc(tok, &p, end, env); - if (r < 0) goto err; - fetched = 1; - /* [--x] or [a&&-x] is warned. */ - if (r == TK_CC_RANGE || and_start != 0) - CC_ESC_WARN(env, "-"); - - goto val_entry; - } - else if (state == CCS_RANGE) { - CC_ESC_WARN(env, "-"); - goto sb_char; /* [!--x] is allowed */ - } - else { /* CCS_COMPLETE */ - r = fetch_token_in_cc(tok, &p, end, env); - if (r < 0) goto err; - fetched = 1; - if (r == TK_CC_CLOSE) goto range_end_val; /* allow [a-b-] */ - else if (r == TK_CC_AND) { - CC_ESC_WARN(env, "-"); - goto range_end_val; - } - - if (IS_SYNTAX_BV(env->syntax, REG_SYN_ALLOW_RANGE_OP_IN_CC)) { - CC_ESC_WARN(env, "-"); - goto sb_char; /* [0-9-a] is allowed as [0-9\-a] */ - } - r = REGERR_UNMATCHED_RANGE_SPECIFIER_IN_CHAR_CLASS; - goto err; - } - break; - - case TK_CC_CC_OPEN: /* [ */ - { - Node *anode; - CClassNode* acc; - - r = parse_char_class(&anode, tok, &p, end, env); - if (r != 0) goto cc_open_err; - acc = &(NCCLASS(anode)); - r = or_cclass(cc, acc); - - cc_open_err: - regex_node_free(anode); - if (r != 0) goto err; - } - break; - - case TK_CC_AND: /* && */ - { - if (state == CCS_VALUE) { - r = next_state_val(cc, &vs, 0, &val_israw, 0, CCV_SB, - &val_type, &state, env); - if (r != 0) goto err; - } - /* initialize local variables */ - and_start = 1; - state = CCS_START; - - if (IS_NOT_NULL(prev_cc)) { - r = and_cclass(prev_cc, cc); - if (r != 0) goto err; - } - else { - prev_cc = cc; - cc = &work_cc; - } - initialize_cclass(cc); - } - break; - - case TK_EOT: - r = REGERR_PREMATURE_END_OF_CHAR_CLASS; - goto err; - break; - default: - r = REGERR_PARSER_BUG; - goto err; - break; - } - - if (fetched) - r = tok->type; - else { - r = fetch_token_in_cc(tok, &p, end, env); - if (r < 0) goto err; - } - } - - if (state == CCS_VALUE) { - r = next_state_val(cc, &vs, 0, &val_israw, 0, CCV_SB, - &val_type, &state, env); - if (r != 0) goto err; - } - - if (IS_NOT_NULL(prev_cc)) { - r = and_cclass(prev_cc, cc); - if (r != 0) goto err; - cc = prev_cc; - } - - cc->not = neg; - if (cc->not != 0 && - IS_SYNTAX_BV(env->syntax, REG_SYN_NOT_NEWLINE_IN_NEGATIVE_CC)) { - int is_empty; - - is_empty = (IS_NULL(cc->mbuf) ? 1 : 0); - if (is_empty != 0) - BITSET_IS_EMPTY(cc->bs, is_empty); - if (is_empty == 0) - BITSET_SET_BIT(cc->bs, NEWLINE); - } - *src = p; - return 0; - - err: - regex_node_free(*np); - return r; -} - -static int parse_subexp(Node** top, RegToken* tok, int term, - UChar** src, UChar* end, ScanEnv* env); - -static int -parse_effect(Node** np, RegToken* tok, int term, UChar** src, UChar* end, - ScanEnv* env) -{ - Node *target; - RegOptionType option; - int r, c, num; - UChar* p = *src; - - *np = NULL; - if (PEND) return REGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS; - - option = env->option; - if (PPEEK == '?' && IS_SYNTAX_OP(env->syntax, REG_SYN_OP_SUBEXP_EFFECT)) { - PINC; - if (PEND) return REGERR_END_PATTERN_IN_GROUP; - - PFETCH(c); - switch (c) { - case '#': /* (?#...) comment */ - while (1) { - if (PEND) return REGERR_END_PATTERN_IN_GROUP; - PFETCH(c); - if (c == ')') break; - } - *src = p; - return 3; /* 3: comment */ - break; - - case ':': /* (?:...) grouping only */ - goto group; - break; - - case '=': - *np = regex_node_new_anchor(ANCHOR_PREC_READ); - break; - case '!': /* preceding read */ - *np = regex_node_new_anchor(ANCHOR_PREC_READ_NOT); - break; - case '>': /* (?>...) stop backtrack */ - *np = node_new_effect(EFFECT_STOP_BACKTRACK); - break; - - case '<': /* look behind (?<=...), (?<!...) */ - PFETCH(c); - if (c == '=') - *np = regex_node_new_anchor(ANCHOR_LOOK_BEHIND); - else if (c == '!') - *np = regex_node_new_anchor(ANCHOR_LOOK_BEHIND_NOT); -#ifdef USE_NAMED_SUBEXP - else if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_NAMED_SUBEXP)) { - UChar *name; - UChar *name_end; - PUNFETCH; - name = p; - r = fetch_name(&p, end, &name_end, env); - if (r < 0) return r; - - *np = node_new_effect(EFFECT_MEMORY); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - num = scan_env_add_mem_entry(env); - if (num < 0) return num; - NEFFECT(*np).regnum = num; - r = name_add(env->reg, name, name_end, num); - if (r != 0) return r; - } -#endif - else - return REGERR_UNDEFINED_GROUP_OPTION; - break; - -#ifdef USE_POSIXLINE_OPTION - case 'p': -#endif - case '-': case 'i': case 'm': case 's': case 'x': - { - int neg = 0; - - while (1) { - switch (c) { - case ':': - case ')': - break; - - case '-': neg = 1; break; - case 'x': ONOFF(option, REG_OPTION_EXTEND, neg); break; - case 'i': ONOFF(option, REG_OPTION_IGNORECASE, neg); break; - case 's': - if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_OPTION_PERL)) { - ONOFF(option, REG_OPTION_MULTILINE, neg); - } - else - return REGERR_UNDEFINED_GROUP_OPTION; - break; - - case 'm': - if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_OPTION_PERL)) { - ONOFF(option, REG_OPTION_SINGLELINE, (neg == 0 ? 1 : 0)); - } - else if (IS_SYNTAX_OP2(env->syntax, REG_SYN_OP2_OPTION_RUBY)) { - ONOFF(option, REG_OPTION_MULTILINE, neg); - } - else - return REGERR_UNDEFINED_GROUP_OPTION; - break; -#ifdef USE_POSIXLINE_OPTION - case 'p': - ONOFF(option, REG_OPTION_MULTILINE|REG_OPTION_SINGLELINE, neg); - break; -#endif - default: - return REGERR_UNDEFINED_GROUP_OPTION; - } - - if (c == ')') { /* option only */ - if (option == env->option) { - *np = node_new_empty(); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - *src = p; - return 0; - } - else { - *np = node_new_option(option); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - *src = p; - return 2; /* option only */ - } - } - else if (c == ':') { - if (env->option == option) { - group: - r = fetch_token(tok, &p, end, env); - if (r < 0) return r; - r = parse_subexp(np, tok, term, &p, end, env); - if (r < 0) return r; - *src = p; - return 1; /* group */ - } - else { - RegOptionType prev = env->option; - - env->option = option; - r = fetch_token(tok, &p, end, env); - if (r < 0) return r; - r = parse_subexp(&target, tok, term, &p, end, env); - env->option = prev; - if (r < 0) return r; - *np = node_new_option(option); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - NEFFECT(*np).target = target; - *src = p; - return 0; - } - } - - if (PEND) return REGERR_END_PATTERN_IN_GROUP; - PFETCH(c); - } - } - break; - - default: - return REGERR_UNDEFINED_GROUP_OPTION; - } - } - else { -#ifdef USE_NAMED_SUBEXP - if (IS_REG_OPTION_ON(env->option, REG_OPTION_CAPTURE_ONLY_NAMED_GROUP)) { - goto group; - } -#endif - *np = node_new_effect(EFFECT_MEMORY); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - num = scan_env_add_mem_entry(env); - if (num < 0) return num; - NEFFECT(*np).regnum = num; - } - - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - r = fetch_token(tok, &p, end, env); - if (r < 0) return r; - r = parse_subexp(&target, tok, term, &p, end, env); - if (r < 0) return r; - - if (NTYPE(*np) == N_ANCHOR) - NANCHOR(*np).target = target; - else - NEFFECT(*np).target = target; - - *src = p; - return 0; -} - -static int -set_qualifier(Node* qnode, Node* target, int group, ScanEnv* env) -{ - QualifierNode* qn; - - qn = &(NQUALIFIER(qnode)); - if (qn->lower == 1 && qn->upper == 1) { - return 1; - } - - switch (NTYPE(target)) { - case N_STRING: - if (! group) { - StrNode* sn = &(NSTRING(target)); - if (str_node_can_be_split(sn, env->enc)) { - Node* n = str_node_split_last_char(sn, env->enc); - if (IS_NOT_NULL(n)) { - qn->target = n; - return 2; - } - } - } - break; - - case N_QUALIFIER: - { /* check redundant double repeat. */ - /* verbose warn (?:.?)? etc... but not warn (.?)? etc... */ - QualifierNode* qnt = &(NQUALIFIER(target)); - -#ifdef USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR - if (qn->by_number == 0 && qnt->by_number == 0) { - if (IS_REPEAT_INFINITE(qn->upper)) { - if (qn->lower == 0) { /* '*' */ - redundant: - { - char buf[WARN_BUFSIZE]; - regex_snprintf_with_pattern(buf, WARN_BUFSIZE, env->enc, - env->pattern, env->pattern_end, - "redundant nested repeat operator"); - VERB_WARNING(buf); - goto warn_exit; - } - } - else if (qn->lower == 1) { /* '+' */ - /* (?:a?)+? only allowed. */ - if (qn->greedy || !(qnt->upper == 1 && qnt->greedy)) - goto redundant; - } - } - else if (qn->upper == 1 && qn->lower == 0) { - if (qn->greedy) { /* '?' */ - if (!(qnt->lower == 1 && qnt->greedy == 0)) /* not '+?' */ - goto redundant; - } - else { /* '??' */ - /* '(?:a+)?? only allowd. (?:a*)?? can be replaced to (?:a+)?? */ - if (!(qnt->greedy && qnt->lower == 1 && - IS_REPEAT_INFINITE(qnt->upper))) - goto redundant; - } - } - } -#endif - -#ifdef USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR - warn_exit: -#endif - if (popular_qualifier_num(qnt) >= 0 && popular_qualifier_num(qn) >= 0) { - reduce_nested_qualifier(qnode, target); - goto q_exit; - } - } - break; - - default: - break; - } - - qn->target = target; - q_exit: - return 0; -} - -static int -parse_exp(Node** np, RegToken* tok, int term, - UChar** src, UChar* end, ScanEnv* env) -{ - int r, len, c, group = 0; - Node* qn; - - start: - *np = NULL; - if (tok->type == term) - goto end_of_token; - - switch (tok->type) { - case TK_ALT: - case TK_EOT: - end_of_token: - *np = node_new_empty(); - return tok->type; - break; - - case TK_SUBEXP_OPEN: - r = parse_effect(np, tok, TK_SUBEXP_CLOSE, src, end, env); - if (r < 0) return r; - if (r == 1) group = 1; - else if (r == 2) { /* option only */ - Node* target; - r = fetch_token(tok, src, end, env); - if (r < 0) return r; - r = parse_subexp(&target, tok, term, src, end, env); - if (r < 0) return r; - NEFFECT(*np).target = target; - return tok->type; - } - else if (r == 3) { /* comment */ - r = fetch_token(tok, src, end, env); - if (r < 0) return r; - goto start; - } - else { - if (NTYPE(*np) == N_EFFECT && NEFFECT(*np).type == EFFECT_MEMORY) { - r = scan_env_set_mem_node(env, NEFFECT(*np).regnum, *np); - if (r != 0) return r; - } - } - break; - - case TK_SUBEXP_CLOSE: - if (! IS_SYNTAX_BV(env->syntax, REG_SYN_ALLOW_UNMATCHED_CLOSE_SUBEXP)) - return REGERR_UNMATCHED_CLOSE_PARENTHESIS; - - if (tok->escaped) goto tk_raw_byte; - else goto tk_byte; - break; - - case TK_BYTE: - tk_byte: - *np = node_new_str_char((UChar )tok->u.c); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - len = mblen(env->enc, tok->u.c); - if (len > 1) { - regex_node_str_cat(*np, *src, *src + len - 1); - *src += (len - 1); - } - while (1) { - r = fetch_token(tok, src, end, env); - if (r < 0) return r; - if (r != TK_BYTE) goto repeat; - - r = node_str_cat_char(*np, (UChar )tok->u.c); - if (r < 0) return r; - len = mblen(env->enc, tok->u.c); - if (len > 1) { - regex_node_str_cat(*np, *src, *src + len - 1); - *src += (len - 1); - } - } - break; - - case TK_RAW_BYTE: - tk_raw_byte: - *np = node_new_str_raw_char((UChar )tok->u.c); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - while (1) { - r = fetch_token(tok, src, end, env); - if (r < 0) return r; - if (r != TK_RAW_BYTE) goto repeat; - - r = node_str_cat_char(*np, (UChar )tok->u.c); - if (r < 0) return r; - } - break; - - case TK_WC: - { - UChar buf[WC2MB_MAX_BUFLEN]; - UChar* bufs = buf; - UChar* bufe = bufs + WC2MB_MAX_BUFLEN; - int num = wc2mb_buf(tok->u.wc, &bufs, &bufe, env->enc); - if (num < 0) return num; - *np = node_new_str_raw(bufs, bufe); - if (bufs != buf) xfree(bufs); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - } - break; - - case TK_QUOTE_OPEN: - { - WCINT end_op[] = { (WCINT )'\\', (WCINT )'E' }; - UChar *qstart, *qend, *nextp; - - qstart = *src; - qend = find_str_position(end_op, 2, qstart, end, &nextp, env->enc); - if (IS_NULL(qend)) { - nextp = qend = end; - } - *np = node_new_str(qstart, qend); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - *src = nextp; - } - break; - - case TK_CHAR_TYPE: - switch (tok->u.subtype) { - case CTYPE_WORD: - case CTYPE_NOT_WORD: - *np = node_new_ctype(tok->u.subtype); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - break; - - case CTYPE_WHITE_SPACE: - *np = node_new_cclass(); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (IS_CODE_SPACE(env->enc, c)) BITSET_SET_BIT(NCCLASS(*np).bs, c); - } - break; - - case CTYPE_NOT_WHITE_SPACE: - *np = node_new_cclass(); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (! IS_CODE_SPACE(env->enc, c)) BITSET_SET_BIT(NCCLASS(*np).bs, c); - } - break; - - case CTYPE_DIGIT: - *np = node_new_cclass(); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (IS_CODE_DIGIT(env->enc, c)) BITSET_SET_BIT(NCCLASS(*np).bs, c); - } - break; - - case CTYPE_NOT_DIGIT: - *np = node_new_cclass(); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - for (c = 0; c < SINGLE_BYTE_SIZE; c++) { - if (! IS_CODE_DIGIT(env->enc, c)) BITSET_SET_BIT(NCCLASS(*np).bs, c); - } - break; - - default: - return REGERR_PARSER_BUG; - break; - } - break; - - case TK_CC_OPEN: - r = parse_char_class(np, tok, src, end, env); - if (r != 0) return r; - break; - - case TK_ANYCHAR: - *np = node_new_anychar(); - break; - - case TK_BACKREF: - len = tok->u.backref.num; - *np = node_new_backref(len, - (len > 1 ? tok->u.backref.refs : &(tok->u.backref.ref1)), env); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - break; - -#ifdef USE_SUBEXP_CALL - case TK_CALL: - *np = node_new_call(tok->u.call.name, tok->u.call.name_end); - CHECK_NULL_RETURN_VAL(*np, REGERR_MEMORY); - env->num_call++; - break; -#endif - - case TK_ANCHOR: - *np = regex_node_new_anchor(tok->u.anchor); - break; - - case TK_OP_REPEAT: - case TK_INTERVAL: - if (IS_SYNTAX_BV(env->syntax, REG_SYN_CONTEXT_INDEP_OPS)) { - if (IS_SYNTAX_BV(env->syntax, REG_SYN_CONTEXT_INVALID_OPS)) - return REGERR_TARGET_OF_REPEAT_OPERATOR_NOT_SPECIFIED; - else - *np = node_new_empty(); - } - else { - *src = tok->backp; - goto tk_byte; - } - break; - - default: - return REGERR_PARSER_BUG; - break; - } - - re_entry: - r = fetch_token(tok, src, end, env); - if (r < 0) return r; - - repeat: - if (r == TK_OP_REPEAT || r == TK_INTERVAL) { - if (is_invalid_qualifier_target(*np)) - return REGERR_TARGET_OF_REPEAT_OPERATOR_INVALID; - - qn = node_new_qualifier(tok->u.repeat.lower, tok->u.repeat.upper, - (r == TK_INTERVAL ? 1 : 0)); - CHECK_NULL_RETURN_VAL(qn, REGERR_MEMORY); - NQUALIFIER(qn).greedy = tok->u.repeat.greedy; - r = set_qualifier(qn, *np, group, env); - if (r < 0) return r; - - if (tok->u.repeat.possessive != 0) { - Node* en; - en = node_new_effect(EFFECT_STOP_BACKTRACK); - CHECK_NULL_RETURN_VAL(en, REGERR_MEMORY); - NEFFECT(en).target = qn; - qn = en; - } - - if (r == 0) { - *np = qn; - } - else if (r == 2) { /* split case: /abc+/ */ - Node* target = *np; - *np = node_new_list(target, NULL); - NCONS(*np).right = node_new_list(qn, NULL); - } - goto re_entry; - } - - return r; -} - -static int -parse_branch(Node** top, RegToken* tok, int term, - UChar** src, UChar* end, ScanEnv* env) -{ - int r; - Node *node, **headp; - - *top = NULL; - r = parse_exp(&node, tok, term, src, end, env); - if (r < 0) return r; - - if (r == TK_EOT || r == term || r == TK_ALT) { - *top = node; - } - else { - *top = node_new_list(node, NULL); - headp = &(NCONS(*top).right); - while (r != TK_EOT && r != term && r != TK_ALT) { - r = parse_exp(&node, tok, term, src, end, env); - if (r < 0) return r; - - if (NTYPE(node) == N_LIST) { - *headp = node; - while (IS_NOT_NULL(NCONS(node).right)) node = NCONS(node).right; - headp = &(NCONS(node).right); - } - else { - *headp = node_new_list(node, NULL); - headp = &(NCONS(*headp).right); - } - } - } - - return r; -} - -/* term_tok: TK_EOT or TK_SUBEXP_CLOSE */ -static int -parse_subexp(Node** top, RegToken* tok, int term, - UChar** src, UChar* end, ScanEnv* env) -{ - int r; - Node *node, **headp; - - *top = NULL; - r = parse_branch(&node, tok, term, src, end, env); - if (r < 0) return r; - - if (r == term) { - *top = node; - } - else if (r == TK_ALT) { - *top = node_new_alt(node, NULL); - headp = &(NCONS(*top).right); - while (r == TK_ALT) { - r = fetch_token(tok, src, end, env); - if (r < 0) return r; - r = parse_branch(&node, tok, term, src, end, env); - if (r < 0) return r; - - *headp = node_new_alt(node, NULL); - headp = &(NCONS(*headp).right); - } - - if (tok->type != term) - goto err; - } - else { - err: - if (term == TK_SUBEXP_CLOSE) - return REGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS; - else - return REGERR_PARSER_BUG; - } - - return r; -} - -static int -parse_regexp(Node** top, UChar** src, UChar* end, ScanEnv* env) -{ - int r; - RegToken tok; - - r = fetch_token(&tok, src, end, env); - if (r < 0) return r; - r = parse_subexp(top, &tok, TK_EOT, src, end, env); - if (r < 0) return r; - return 0; -} - -extern int -regex_parse_make_tree(Node** root, UChar* pattern, UChar* end, regex_t* reg, - ScanEnv* env) -{ - int r; - UChar* p; - -#ifdef USE_NAMED_SUBEXP - names_clear(reg); -#endif - - scan_env_clear(env); - env->option = reg->options; - env->enc = reg->enc; - env->syntax = reg->syntax; - env->pattern = pattern; - env->pattern_end = end; - env->reg = reg; - - *root = NULL; - p = pattern; - r = parse_regexp(root, &p, end, env); - reg->num_mem = env->num_mem; - return r; -} - -extern void -regex_scan_env_set_error_string(ScanEnv* env, int ecode, - UChar* arg, UChar* arg_end) -{ - env->error = arg; - env->error_end = arg_end; -} |