mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
565 lines
15 KiB
C
565 lines
15 KiB
C
#include <psych.h>
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VALUE cPsychParser;
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static ID id_read;
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static ID id_path;
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static ID id_empty;
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static ID id_start_stream;
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static ID id_end_stream;
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static ID id_start_document;
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static ID id_end_document;
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static ID id_alias;
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static ID id_scalar;
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static ID id_start_sequence;
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static ID id_end_sequence;
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static ID id_start_mapping;
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static ID id_end_mapping;
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static ID id_event_location;
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#define PSYCH_TRANSCODE(_str, _yaml_enc, _internal_enc) \
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do { \
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rb_enc_associate_index((_str), (_yaml_enc)); \
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if(_internal_enc) \
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(_str) = rb_str_export_to_enc((_str), (_internal_enc)); \
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} while (0)
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static int io_reader(void * data, unsigned char *buf, size_t size, size_t *read)
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{
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VALUE io = (VALUE)data;
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VALUE string = rb_funcall(io, id_read, 1, SIZET2NUM(size));
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*read = 0;
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if(! NIL_P(string)) {
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void * str = (void *)StringValuePtr(string);
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*read = (size_t)RSTRING_LEN(string);
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memcpy(buf, str, *read);
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}
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return 1;
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}
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static void dealloc(void * ptr)
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{
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yaml_parser_t * parser;
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parser = (yaml_parser_t *)ptr;
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yaml_parser_delete(parser);
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xfree(parser);
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}
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#if 0
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static size_t memsize(const void *ptr)
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{
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const yaml_parser_t *parser = ptr;
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/* TODO: calculate parser's size */
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return 0;
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}
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#endif
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static const rb_data_type_t psych_parser_type = {
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"Psych/parser",
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{0, dealloc, 0,},
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0, 0,
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#ifdef RUBY_TYPED_FREE_IMMEDIATELY
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RUBY_TYPED_FREE_IMMEDIATELY,
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#endif
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};
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static VALUE allocate(VALUE klass)
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{
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yaml_parser_t * parser;
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VALUE obj = TypedData_Make_Struct(klass, yaml_parser_t, &psych_parser_type, parser);
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yaml_parser_initialize(parser);
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return obj;
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}
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static VALUE make_exception(yaml_parser_t * parser, VALUE path)
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{
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if (parser->error == YAML_MEMORY_ERROR) {
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return rb_eNoMemError;
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} else {
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size_t line, column;
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VALUE ePsychSyntaxError;
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line = parser->context_mark.line + 1;
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column = parser->context_mark.column + 1;
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ePsychSyntaxError = rb_const_get(mPsych, rb_intern("SyntaxError"));
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return rb_funcall(ePsychSyntaxError, rb_intern("new"), 6,
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path,
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SIZET2NUM(line),
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SIZET2NUM(column),
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SIZET2NUM(parser->problem_offset),
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parser->problem ? rb_usascii_str_new2(parser->problem) : Qnil,
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parser->context ? rb_usascii_str_new2(parser->context) : Qnil);
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}
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}
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static VALUE transcode_string(VALUE src, int * parser_encoding)
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{
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int utf8 = rb_utf8_encindex();
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int utf16le = rb_enc_find_index("UTF-16LE");
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int utf16be = rb_enc_find_index("UTF-16BE");
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int source_encoding = rb_enc_get_index(src);
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if (source_encoding == utf8) {
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*parser_encoding = YAML_UTF8_ENCODING;
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return src;
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}
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if (source_encoding == utf16le) {
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*parser_encoding = YAML_UTF16LE_ENCODING;
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return src;
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}
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if (source_encoding == utf16be) {
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*parser_encoding = YAML_UTF16BE_ENCODING;
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return src;
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}
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src = rb_str_export_to_enc(src, rb_utf8_encoding());
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RB_GC_GUARD(src);
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*parser_encoding = YAML_UTF8_ENCODING;
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return src;
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}
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static VALUE transcode_io(VALUE src, int * parser_encoding)
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{
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VALUE io_external_encoding;
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int io_external_enc_index;
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io_external_encoding = rb_funcall(src, rb_intern("external_encoding"), 0);
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/* if no encoding is returned, assume ascii8bit. */
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if (NIL_P(io_external_encoding)) {
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io_external_enc_index = rb_ascii8bit_encindex();
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} else {
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io_external_enc_index = rb_to_encoding_index(io_external_encoding);
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}
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/* Treat US-ASCII as utf_8 */
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if (io_external_enc_index == rb_usascii_encindex()) {
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*parser_encoding = YAML_UTF8_ENCODING;
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return src;
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}
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if (io_external_enc_index == rb_utf8_encindex()) {
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*parser_encoding = YAML_UTF8_ENCODING;
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return src;
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}
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if (io_external_enc_index == rb_enc_find_index("UTF-16LE")) {
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*parser_encoding = YAML_UTF16LE_ENCODING;
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return src;
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}
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if (io_external_enc_index == rb_enc_find_index("UTF-16BE")) {
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*parser_encoding = YAML_UTF16BE_ENCODING;
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return src;
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}
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/* Just guess on ASCII-8BIT */
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if (io_external_enc_index == rb_ascii8bit_encindex()) {
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*parser_encoding = YAML_ANY_ENCODING;
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return src;
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}
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/* If the external encoding is something we don't know how to handle,
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* fall back to YAML_ANY_ENCODING. */
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*parser_encoding = YAML_ANY_ENCODING;
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return src;
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}
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static VALUE protected_start_stream(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall(args[0], id_start_stream, 1, args[1]);
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}
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static VALUE protected_start_document(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall3(args[0], id_start_document, 3, args + 1);
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}
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static VALUE protected_end_document(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall(args[0], id_end_document, 1, args[1]);
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}
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static VALUE protected_alias(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall(args[0], id_alias, 1, args[1]);
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}
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static VALUE protected_scalar(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall3(args[0], id_scalar, 6, args + 1);
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}
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static VALUE protected_start_sequence(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall3(args[0], id_start_sequence, 4, args + 1);
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}
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static VALUE protected_end_sequence(VALUE handler)
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{
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return rb_funcall(handler, id_end_sequence, 0);
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}
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static VALUE protected_start_mapping(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall3(args[0], id_start_mapping, 4, args + 1);
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}
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static VALUE protected_end_mapping(VALUE handler)
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{
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return rb_funcall(handler, id_end_mapping, 0);
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}
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static VALUE protected_empty(VALUE handler)
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{
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return rb_funcall(handler, id_empty, 0);
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}
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static VALUE protected_end_stream(VALUE handler)
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{
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return rb_funcall(handler, id_end_stream, 0);
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}
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static VALUE protected_event_location(VALUE pointer)
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{
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VALUE *args = (VALUE *)pointer;
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return rb_funcall3(args[0], id_event_location, 4, args + 1);
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}
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static VALUE parse(VALUE self, VALUE handler, VALUE yaml, VALUE path)
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{
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yaml_parser_t * parser;
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yaml_event_t event;
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int done = 0;
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int state = 0;
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int parser_encoding = YAML_ANY_ENCODING;
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int encoding = rb_utf8_encindex();
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rb_encoding * internal_enc = rb_default_internal_encoding();
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TypedData_Get_Struct(self, yaml_parser_t, &psych_parser_type, parser);
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yaml_parser_delete(parser);
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yaml_parser_initialize(parser);
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if (rb_respond_to(yaml, id_read)) {
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yaml = transcode_io(yaml, &parser_encoding);
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yaml_parser_set_encoding(parser, parser_encoding);
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yaml_parser_set_input(parser, io_reader, (void *)yaml);
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} else {
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StringValue(yaml);
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yaml = transcode_string(yaml, &parser_encoding);
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yaml_parser_set_encoding(parser, parser_encoding);
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yaml_parser_set_input_string(
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parser,
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(const unsigned char *)RSTRING_PTR(yaml),
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(size_t)RSTRING_LEN(yaml)
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);
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}
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while(!done) {
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VALUE event_args[5];
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VALUE start_line, start_column, end_line, end_column;
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if(parser->error || !yaml_parser_parse(parser, &event)) {
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VALUE exception;
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exception = make_exception(parser, path);
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yaml_parser_delete(parser);
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yaml_parser_initialize(parser);
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rb_exc_raise(exception);
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}
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start_line = SIZET2NUM(event.start_mark.line);
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start_column = SIZET2NUM(event.start_mark.column);
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end_line = SIZET2NUM(event.end_mark.line);
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end_column = SIZET2NUM(event.end_mark.column);
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event_args[0] = handler;
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event_args[1] = start_line;
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event_args[2] = start_column;
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event_args[3] = end_line;
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event_args[4] = end_column;
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rb_protect(protected_event_location, (VALUE)event_args, &state);
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switch(event.type) {
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case YAML_STREAM_START_EVENT:
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{
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VALUE args[2];
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args[0] = handler;
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args[1] = INT2NUM(event.data.stream_start.encoding);
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rb_protect(protected_start_stream, (VALUE)args, &state);
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}
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break;
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case YAML_DOCUMENT_START_EVENT:
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{
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VALUE args[4];
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/* Get a list of tag directives (if any) */
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VALUE tag_directives = rb_ary_new();
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/* Grab the document version */
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VALUE version = event.data.document_start.version_directive ?
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rb_ary_new3(
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(long)2,
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INT2NUM(event.data.document_start.version_directive->major),
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INT2NUM(event.data.document_start.version_directive->minor)
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) : rb_ary_new();
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if(event.data.document_start.tag_directives.start) {
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yaml_tag_directive_t *start =
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event.data.document_start.tag_directives.start;
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yaml_tag_directive_t *end =
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event.data.document_start.tag_directives.end;
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for(; start != end; start++) {
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VALUE handle = Qnil;
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VALUE prefix = Qnil;
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if(start->handle) {
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handle = rb_str_new2((const char *)start->handle);
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PSYCH_TRANSCODE(handle, encoding, internal_enc);
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}
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if(start->prefix) {
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prefix = rb_str_new2((const char *)start->prefix);
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PSYCH_TRANSCODE(prefix, encoding, internal_enc);
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}
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rb_ary_push(tag_directives, rb_ary_new3((long)2, handle, prefix));
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}
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}
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args[0] = handler;
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args[1] = version;
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args[2] = tag_directives;
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args[3] = event.data.document_start.implicit == 1 ? Qtrue : Qfalse;
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rb_protect(protected_start_document, (VALUE)args, &state);
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}
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break;
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case YAML_DOCUMENT_END_EVENT:
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{
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VALUE args[2];
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args[0] = handler;
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args[1] = event.data.document_end.implicit == 1 ? Qtrue : Qfalse;
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rb_protect(protected_end_document, (VALUE)args, &state);
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}
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break;
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case YAML_ALIAS_EVENT:
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{
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VALUE args[2];
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VALUE alias = Qnil;
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if(event.data.alias.anchor) {
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alias = rb_str_new2((const char *)event.data.alias.anchor);
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PSYCH_TRANSCODE(alias, encoding, internal_enc);
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}
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args[0] = handler;
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args[1] = alias;
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rb_protect(protected_alias, (VALUE)args, &state);
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}
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break;
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case YAML_SCALAR_EVENT:
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{
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VALUE args[7];
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VALUE anchor = Qnil;
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VALUE tag = Qnil;
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VALUE plain_implicit, quoted_implicit, style;
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VALUE val = rb_str_new(
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(const char *)event.data.scalar.value,
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(long)event.data.scalar.length
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);
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PSYCH_TRANSCODE(val, encoding, internal_enc);
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if(event.data.scalar.anchor) {
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anchor = rb_str_new2((const char *)event.data.scalar.anchor);
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PSYCH_TRANSCODE(anchor, encoding, internal_enc);
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}
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if(event.data.scalar.tag) {
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tag = rb_str_new2((const char *)event.data.scalar.tag);
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PSYCH_TRANSCODE(tag, encoding, internal_enc);
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}
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plain_implicit =
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event.data.scalar.plain_implicit == 0 ? Qfalse : Qtrue;
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quoted_implicit =
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event.data.scalar.quoted_implicit == 0 ? Qfalse : Qtrue;
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style = INT2NUM(event.data.scalar.style);
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args[0] = handler;
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args[1] = val;
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args[2] = anchor;
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args[3] = tag;
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args[4] = plain_implicit;
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args[5] = quoted_implicit;
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args[6] = style;
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rb_protect(protected_scalar, (VALUE)args, &state);
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}
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break;
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case YAML_SEQUENCE_START_EVENT:
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{
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VALUE args[5];
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VALUE anchor = Qnil;
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VALUE tag = Qnil;
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VALUE implicit, style;
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if(event.data.sequence_start.anchor) {
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anchor = rb_str_new2((const char *)event.data.sequence_start.anchor);
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PSYCH_TRANSCODE(anchor, encoding, internal_enc);
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}
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tag = Qnil;
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if(event.data.sequence_start.tag) {
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tag = rb_str_new2((const char *)event.data.sequence_start.tag);
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PSYCH_TRANSCODE(tag, encoding, internal_enc);
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}
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implicit =
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event.data.sequence_start.implicit == 0 ? Qfalse : Qtrue;
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style = INT2NUM(event.data.sequence_start.style);
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args[0] = handler;
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args[1] = anchor;
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args[2] = tag;
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args[3] = implicit;
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args[4] = style;
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rb_protect(protected_start_sequence, (VALUE)args, &state);
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}
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break;
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case YAML_SEQUENCE_END_EVENT:
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rb_protect(protected_end_sequence, handler, &state);
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break;
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case YAML_MAPPING_START_EVENT:
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{
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VALUE args[5];
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VALUE anchor = Qnil;
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VALUE tag = Qnil;
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VALUE implicit, style;
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if(event.data.mapping_start.anchor) {
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anchor = rb_str_new2((const char *)event.data.mapping_start.anchor);
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PSYCH_TRANSCODE(anchor, encoding, internal_enc);
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}
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if(event.data.mapping_start.tag) {
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tag = rb_str_new2((const char *)event.data.mapping_start.tag);
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PSYCH_TRANSCODE(tag, encoding, internal_enc);
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}
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implicit =
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event.data.mapping_start.implicit == 0 ? Qfalse : Qtrue;
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style = INT2NUM(event.data.mapping_start.style);
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args[0] = handler;
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args[1] = anchor;
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args[2] = tag;
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args[3] = implicit;
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args[4] = style;
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rb_protect(protected_start_mapping, (VALUE)args, &state);
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}
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break;
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case YAML_MAPPING_END_EVENT:
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rb_protect(protected_end_mapping, handler, &state);
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break;
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case YAML_NO_EVENT:
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rb_protect(protected_empty, handler, &state);
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break;
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case YAML_STREAM_END_EVENT:
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rb_protect(protected_end_stream, handler, &state);
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done = 1;
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break;
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}
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yaml_event_delete(&event);
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if (state) rb_jump_tag(state);
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}
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return self;
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}
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/*
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* call-seq:
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* parser.mark # => #<Psych::Parser::Mark>
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*
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* Returns a Psych::Parser::Mark object that contains line, column, and index
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* information.
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*/
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static VALUE mark(VALUE self)
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{
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VALUE mark_klass;
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VALUE args[3];
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yaml_parser_t * parser;
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TypedData_Get_Struct(self, yaml_parser_t, &psych_parser_type, parser);
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mark_klass = rb_const_get_at(cPsychParser, rb_intern("Mark"));
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args[0] = SIZET2NUM(parser->mark.index);
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args[1] = SIZET2NUM(parser->mark.line);
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args[2] = SIZET2NUM(parser->mark.column);
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return rb_class_new_instance(3, args, mark_klass);
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}
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void Init_psych_parser(void)
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{
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#undef rb_intern
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#if 0
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mPsych = rb_define_module("Psych");
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#endif
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cPsychParser = rb_define_class_under(mPsych, "Parser", rb_cObject);
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rb_define_alloc_func(cPsychParser, allocate);
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/* Any encoding: Let the parser choose the encoding */
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rb_define_const(cPsychParser, "ANY", INT2NUM(YAML_ANY_ENCODING));
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/* UTF-8 Encoding */
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rb_define_const(cPsychParser, "UTF8", INT2NUM(YAML_UTF8_ENCODING));
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|
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/* UTF-16-LE Encoding with BOM */
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rb_define_const(cPsychParser, "UTF16LE", INT2NUM(YAML_UTF16LE_ENCODING));
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|
|
/* UTF-16-BE Encoding with BOM */
|
|
rb_define_const(cPsychParser, "UTF16BE", INT2NUM(YAML_UTF16BE_ENCODING));
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|
|
rb_require("psych/syntax_error");
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|
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rb_define_private_method(cPsychParser, "_native_parse", parse, 3);
|
|
rb_define_method(cPsychParser, "mark", mark, 0);
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id_read = rb_intern("read");
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id_path = rb_intern("path");
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|
id_empty = rb_intern("empty");
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|
id_start_stream = rb_intern("start_stream");
|
|
id_end_stream = rb_intern("end_stream");
|
|
id_start_document = rb_intern("start_document");
|
|
id_end_document = rb_intern("end_document");
|
|
id_alias = rb_intern("alias");
|
|
id_scalar = rb_intern("scalar");
|
|
id_start_sequence = rb_intern("start_sequence");
|
|
id_end_sequence = rb_intern("end_sequence");
|
|
id_start_mapping = rb_intern("start_mapping");
|
|
id_end_mapping = rb_intern("end_mapping");
|
|
id_event_location = rb_intern("event_location");
|
|
}
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/* vim: set noet sws=4 sw=4: */
|