diff options
Diffstat (limited to 'ext/encoder/encoder.c')
| -rw-r--r-- | ext/encoder/encoder.c | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/ext/encoder/encoder.c b/ext/encoder/encoder.c new file mode 100644 index 0000000..6f1492c --- /dev/null +++ b/ext/encoder/encoder.c @@ -0,0 +1,394 @@ +#include <ruby.h> +#include <yajl/yajl_gen.h> + +static VALUE mFFI_Yajl, mExt, mEncoder, mEncoder2, cEncodeError; +static VALUE cDate, cTime, cDateTime, cStringIO; +static VALUE cYajl_Gen; + +/* FIXME: the json gem does a whole bunch of indirection around monkeypatching... not sure if we need to as well... */ + +static VALUE mEncoder_do_yajl_encode(VALUE self, VALUE obj, VALUE yajl_gen_opts, VALUE json_opts) { + ID sym_ffi_yajl = rb_intern("ffi_yajl"); + VALUE sym_yajl_gen_beautify = ID2SYM(rb_intern("yajl_gen_beautify")); + VALUE sym_yajl_gen_validate_utf8 = ID2SYM(rb_intern("yajl_gen_validate_utf8")); + VALUE sym_yajl_gen_indent_string = ID2SYM(rb_intern("yajl_gen_indent_string")); + yajl_gen yajl_gen; + const unsigned char *buf; + size_t len; + VALUE state; + VALUE ret; + VALUE indent_string; + VALUE rb_yajl_gen; + + yajl_gen = yajl_gen_alloc(NULL); + + if ( rb_hash_aref(yajl_gen_opts, sym_yajl_gen_beautify) == Qtrue ) { + yajl_gen_config(yajl_gen, yajl_gen_beautify, 1); + } + if ( rb_hash_aref(yajl_gen_opts, sym_yajl_gen_validate_utf8) == Qtrue ) { + yajl_gen_config(yajl_gen, yajl_gen_validate_utf8, 1); + } + + indent_string = rb_hash_aref(yajl_gen_opts, sym_yajl_gen_indent_string); + if (indent_string != Qnil) { + yajl_gen_config(yajl_gen, yajl_gen_indent_string, RSTRING_PTR(indent_string)); + } else { + yajl_gen_config(yajl_gen, yajl_gen_indent_string, " "); + } + + state = rb_hash_new(); + + rb_hash_aset(state, rb_str_new2("processing_key"), Qfalse); + + rb_hash_aset(state, rb_str_new2("json_opts"), json_opts); + + rb_yajl_gen = Data_Wrap_Struct(cYajl_Gen, NULL, NULL, yajl_gen); + + rb_funcall(obj, sym_ffi_yajl, 2, rb_yajl_gen, state); + + yajl_gen_get_buf(yajl_gen, &buf, &len); + + ret = rb_str_new2((char *)buf); + + yajl_gen_free(yajl_gen); + + return ret; +} + +int rb_cHash_ffi_yajl_callback(VALUE key, VALUE val, VALUE extra) { + ID sym_ffi_yajl = rb_intern("ffi_yajl"); + VALUE state = rb_hash_aref(extra, rb_str_new2("state")); + VALUE rb_yajl_gen = rb_hash_aref(extra, rb_str_new2("yajl_gen")); + + rb_hash_aset(state, rb_str_new2("processing_key"), Qtrue); + rb_funcall(key, sym_ffi_yajl, 2, rb_yajl_gen, state); + rb_hash_aset(state, rb_str_new2("processing_key"), Qfalse); + + rb_funcall(val, sym_ffi_yajl, 2, rb_yajl_gen, state); + + return 0; +} + +#define RB_FUNC0(call) rb_funcall(self, rb_intern(call), 0) + +/* + * wrappers around yajl_gen_* functions + */ + +/* encode a c-string as a yajl string */ +VALUE gen_cstring(VALUE rb_yajl_gen, char *cptr, int len) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_string(yajl_gen, (unsigned char *)cptr, len)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new(cptr, len)); + } + + return Qnil; +} + +/* encode a ruby-sring as a yajl string */ +VALUE gen_string(VALUE rb_yajl_gen, VALUE str) { + char *cptr = RSTRING_PTR(str); + int len = RSTRING_LEN(str); + + return gen_cstring(rb_yajl_gen, cptr, len); +} + +/* calls #to_s on an object to encode it as a yajl string */ +static VALUE gen_string_to_s(VALUE rb_yajl_gen, VALUE self) { + return gen_string(rb_yajl_gen, RB_FUNC0("to_s")); +} + +/* encode a ruby string as a yajl number (also used to embed already-rendered json from #to_json) */ +VALUE gen_number(VALUE rb_yajl_gen, VALUE str) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + char *cptr = RSTRING_PTR(str); + int len = RSTRING_LEN(str); + + if ((status = yajl_gen_number(yajl_gen, cptr, len)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), str); + } + + return Qnil; +} + +/* encode hash open */ +VALUE gen_map_open(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_map_open(yajl_gen)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("{")); + } + + return Qnil; +} + +/* encode a hash close */ +VALUE gen_map_close(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_map_close(yajl_gen)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("}")); + } + + return Qnil; +} + +/* encode an array open */ +VALUE gen_array_open(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_array_open(yajl_gen)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("[")); + } + + return Qnil; +} + +/* encode an array close */ +VALUE gen_array_close(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_array_close(yajl_gen)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("]")); + } + + return Qnil; +} + +/* encode a json null */ +VALUE gen_null(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_null(yajl_gen)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("null")); + } + + return Qnil; +} + +/* encode a true value */ +VALUE gen_true(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_bool(yajl_gen, 1)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("true")); + } + + return Qnil; +} + +/* encode a false value */ +VALUE gen_false(VALUE rb_yajl_gen) { + yajl_gen_status status; + struct yajl_gen_t *yajl_gen; + Data_Get_Struct(rb_yajl_gen, struct yajl_gen_t, yajl_gen); + + if ((status = yajl_gen_bool(yajl_gen, 0)) != yajl_gen_status_ok) { + rb_funcall(mEncoder2, rb_intern("raise_error_for_status"), 2, INT2FIX(status), rb_str_new2("false")); + } + + return Qnil; +} + +/* + * <Object>#to_ffi_yajl() method calls + */ + +static VALUE rb_cHash_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + if ( rb_hash_aref(state, rb_str_new2("processing_key")) == Qtrue ) { + gen_string(rb_yajl_gen, rb_funcall(self, rb_intern("to_s"), 0)); + } else { + + /* FIXME: i think this got refactored from something else and it is now pointless -- + should just pass rb_yajl_gen directly instead of this 'extra' hash -- i don't + *think* this indirection is doing anything useful to mark memory against the GC */ + + VALUE extra = rb_hash_new(); + + rb_hash_aset(extra, rb_str_new2("yajl_gen"), rb_yajl_gen); + + rb_hash_aset(extra, rb_str_new2("state"), state); + + gen_map_open(rb_yajl_gen); + + rb_hash_foreach(self, rb_cHash_ffi_yajl_callback, extra); + + gen_map_close(rb_yajl_gen); + } + + return Qnil; +} + +static VALUE rb_cArray_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + if ( rb_hash_aref(state, rb_str_new2("processing_key")) == Qtrue ) { + gen_string(rb_yajl_gen, rb_funcall(self, rb_intern("to_s"), 0)); + } else { + VALUE val; + long i; + ID sym_ffi_yajl = rb_intern("ffi_yajl"); + + gen_array_open(rb_yajl_gen); + + for(i=0; i<RARRAY_LEN(self); i++) { + val = rb_ary_entry(self, i); + rb_funcall(val, sym_ffi_yajl, 2, rb_yajl_gen, state); + } + + gen_array_close(rb_yajl_gen); + } + + return Qnil; +} + +static VALUE rb_cNilClass_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + if ( rb_hash_aref(state, rb_str_new2("processing_key")) == Qtrue ) { + gen_cstring(rb_yajl_gen, "", sizeof("")-1); + } else { + gen_null(rb_yajl_gen); + } + + return Qnil; +} + +static VALUE rb_cTrueClass_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + if ( rb_hash_aref(state, rb_str_new2("processing_key")) == Qtrue ) { + gen_cstring(rb_yajl_gen, "true", sizeof("true")-1); + } else { + gen_true(rb_yajl_gen); + } + + return Qnil; +} + +static VALUE rb_cFalseClass_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + if ( rb_hash_aref(state, rb_str_new2("processing_key")) == Qtrue ) { + gen_cstring(rb_yajl_gen, "false", sizeof("false")-1); + } else { + gen_false(rb_yajl_gen); + } + + return Qnil; +} + +static VALUE rb_cFixnum_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + VALUE str = rb_funcall(self, rb_intern("to_s"), 0); + char *cptr = RSTRING_PTR(str); + + if (memcmp(cptr, "NaN", sizeof("NaN")) == 0 || memcmp(cptr, "Infinity", sizeof("Infinity")) == 0 || memcmp(cptr, "-Infinity", sizeof("-Infinity")) == 0) { + rb_raise(cEncodeError, "'%s' is an invalid number", cptr); + } + + if ( rb_hash_aref(state, rb_str_new2("processing_key")) == Qtrue ) { + gen_string(rb_yajl_gen, str); + } else { + gen_number(rb_yajl_gen, str); + } + + return Qnil; +} + +static VALUE rb_cBignum_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return rb_cFixnum_ffi_yajl(self, rb_yajl_gen, state); +} + +static VALUE rb_cFloat_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return rb_cFixnum_ffi_yajl(self, rb_yajl_gen, state); +} + +static VALUE rb_cString_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return gen_string(rb_yajl_gen, self); +} + +static VALUE rb_cSymbol_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return gen_string_to_s(rb_yajl_gen, self); +} + +static VALUE rb_cDate_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return gen_string_to_s(rb_yajl_gen, self); +} + +static VALUE rb_cTime_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + ID sym_strftime = rb_intern("strftime"); + VALUE str = rb_funcall(self, sym_strftime, 1, rb_str_new2("%Y-%m-%d %H:%M:%S %z")); + + return gen_string(rb_yajl_gen, str); +} + +static VALUE rb_cStringIO_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return gen_string(rb_yajl_gen, RB_FUNC0("read")); +} + +static VALUE rb_cDateTime_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + return gen_string_to_s(rb_yajl_gen, self); +} + +static VALUE rb_cObject_ffi_yajl(VALUE self, VALUE rb_yajl_gen, VALUE state) { + ID sym_to_json = rb_intern("to_json"); + if ( rb_hash_aref(state, rb_str_new2("processing_key")) != Qtrue && rb_respond_to(self, sym_to_json) ) { + VALUE json_opts = rb_hash_aref(state, rb_str_new2("json_opts")); + VALUE str = rb_funcall(self, sym_to_json, 1, json_opts); + + gen_number(rb_yajl_gen, str); + } else { + gen_string_to_s(rb_yajl_gen, self); + } + + return Qnil; +} + +void Init_encoder() { + mFFI_Yajl = rb_define_module("FFI_Yajl"); + mEncoder2 = rb_define_class_under(mFFI_Yajl, "Encoder", rb_cObject); + cEncodeError = rb_define_class_under(mFFI_Yajl, "EncodeError", rb_eStandardError); + mExt = rb_define_module_under(mFFI_Yajl, "Ext"); + mEncoder = rb_define_module_under(mExt, "Encoder"); + cYajl_Gen = rb_define_class_under(mEncoder, "YajlGen", rb_cObject); + rb_define_method(mEncoder, "do_yajl_encode", mEncoder_do_yajl_encode, 3); + + /* use rb_const_get instead of rb_define_class so that we don't get superclass mismatches */ + ID sym_Date = rb_intern("Date"); + cDate = rb_const_get(rb_cObject, sym_Date); + ID sym_Time = rb_intern("Time"); + cTime = rb_const_get(rb_cObject, sym_Time); + ID sym_DateTime = rb_intern("DateTime"); + cDateTime = rb_const_get(rb_cObject, sym_DateTime); + ID sym_StringIO = rb_intern("StringIO"); + cStringIO = rb_const_get(rb_cObject, sym_StringIO); + + rb_define_method(rb_cHash, "ffi_yajl", rb_cHash_ffi_yajl, 2); + rb_define_method(rb_cArray, "ffi_yajl", rb_cArray_ffi_yajl, 2); + rb_define_method(rb_cNilClass, "ffi_yajl", rb_cNilClass_ffi_yajl, 2); + rb_define_method(rb_cTrueClass, "ffi_yajl", rb_cTrueClass_ffi_yajl, 2); + rb_define_method(rb_cFalseClass, "ffi_yajl", rb_cFalseClass_ffi_yajl, 2); +#ifdef rb_cFixnum /* ruby < 2.4 */ + rb_define_method(rb_cFixnum, "ffi_yajl", rb_cFixnum_ffi_yajl, 2); + rb_define_method(rb_cBignum, "ffi_yajl", rb_cBignum_ffi_yajl, 2); +#else + rb_define_method(rb_cInteger, "ffi_yajl", rb_cFixnum_ffi_yajl, 2); +#endif + rb_define_method(rb_cFloat, "ffi_yajl", rb_cFloat_ffi_yajl, 2); + rb_define_method(rb_cString, "ffi_yajl", rb_cString_ffi_yajl, 2); + rb_define_method(rb_cSymbol, "ffi_yajl", rb_cSymbol_ffi_yajl, 2); + rb_define_method(cDate, "ffi_yajl", rb_cDate_ffi_yajl, 2); + rb_define_method(cTime, "ffi_yajl", rb_cTime_ffi_yajl, 2); + rb_define_method(cDateTime, "ffi_yajl", rb_cDateTime_ffi_yajl, 2); + rb_define_method(cStringIO, "ffi_yajl", rb_cStringIO_ffi_yajl, 2); + rb_define_method(rb_cObject, "ffi_yajl", rb_cObject_ffi_yajl, 2); +} |