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#include <psych.h>
static VALUE parse_string(VALUE self, VALUE string)
{
yaml_parser_t parser;
yaml_event_t event;
yaml_parser_initialize(&parser);
yaml_parser_set_input_string(
&parser,
StringValuePtr(string),
RSTRING_LEN(string)
);
int done = 0;
VALUE handler = rb_iv_get(self, "@handler");
while(!done) {
if(!yaml_parser_parse(&parser, &event)) {
yaml_parser_delete(&parser);
rb_raise(rb_eRuntimeError, "couldn't parse YAML");
}
switch(event.type) {
case YAML_STREAM_START_EVENT:
rb_funcall(handler, rb_intern("start_stream"), 1,
INT2NUM((long)event.data.stream_start.encoding)
);
break;
case YAML_DOCUMENT_START_EVENT:
{
// Grab the document version
VALUE version = event.data.document_start.version_directive ?
rb_ary_new3(
(long)2,
INT2NUM((long)event.data.document_start.version_directive->major),
INT2NUM((long)event.data.document_start.version_directive->minor)
) : rb_ary_new();
// Get a list of tag directives (if any)
VALUE tag_directives = rb_ary_new();
if(event.data.document_start.tag_directives.start) {
yaml_tag_directive_t *start =
event.data.document_start.tag_directives.start;
yaml_tag_directive_t *end =
event.data.document_start.tag_directives.end;
for(; start != end; start++) {
VALUE pair = rb_ary_new3((long)2,
start->handle ? rb_str_new2(start->handle) : Qnil,
start->prefix ? rb_str_new2(start->prefix) : Qnil
);
rb_ary_push(tag_directives, pair);
}
}
rb_funcall(handler, rb_intern("start_document"), 3,
version, tag_directives,
event.data.document_start.implicit == 1 ? Qtrue : Qfalse
);
}
break;
case YAML_STREAM_END_EVENT:
rb_funcall(handler, rb_intern("end_stream"), 0);
done = 1;
break;
}
}
return self;
}
VALUE cPsychParser;
void Init_psych_parser()
{
cPsychParser = rb_define_class_under(mPsych, "Parser", rb_cObject);
rb_define_private_method(cPsychParser, "parse_string", parse_string, 1);
}
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