diff options
Diffstat (limited to 'ext/psych/emitter.c')
-rw-r--r-- | ext/psych/emitter.c | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/ext/psych/emitter.c b/ext/psych/emitter.c new file mode 100644 index 0000000000..74f91f22bc --- /dev/null +++ b/ext/psych/emitter.c @@ -0,0 +1,413 @@ +#include <psych.h> + +VALUE cPsychEmitter; +static ID id_write; + +static void emit(yaml_emitter_t * emitter, yaml_event_t * event) +{ + if(!yaml_emitter_emit(emitter, event)) + rb_raise(rb_eRuntimeError, "%s", emitter->problem); +} + +static int writer(void *ctx, unsigned char *buffer, size_t size) +{ + VALUE io = (VALUE)ctx; + VALUE str = rb_str_new((const char *)buffer, (long)size); + VALUE wrote = rb_funcall(io, id_write, 1, str); + return (int)NUM2INT(wrote); +} + +static void dealloc(yaml_emitter_t * emitter) +{ + yaml_emitter_delete(emitter); + free(emitter); +} + +static VALUE allocate(VALUE klass) +{ + yaml_emitter_t * emitter = malloc(sizeof(yaml_emitter_t)); + yaml_emitter_initialize(emitter); + yaml_emitter_set_unicode(emitter, 1); + yaml_emitter_set_indent(emitter, 2); + + return Data_Wrap_Struct(klass, 0, dealloc, emitter); +} + +/* call-seq: Psych::Emitter.new(io) + * + * Create a new Psych::Emitter that writes to +io+. + */ +static VALUE initialize(VALUE self, VALUE io) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_emitter_set_output(emitter, writer, (void *)io); + + return self; +} + +/* call-seq: emitter.start_stream(encoding) + * + * Start a stream emission with +encoding+ + * + * See Psych::Handler#start_stream + */ +static VALUE start_stream(VALUE self, VALUE encoding) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + Check_Type(encoding, T_FIXNUM); + + yaml_event_t event; + yaml_stream_start_event_initialize(&event, (yaml_encoding_t)NUM2INT(encoding)); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.end_stream + * + * End a stream emission + * + * See Psych::Handler#end_stream + */ +static VALUE end_stream(VALUE self) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_stream_end_event_initialize(&event); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.start_document(version, tags, implicit) + * + * Start a document emission with YAML +version+, +tags+, and an +implicit+ + * start. + * + * See Psych::Handler#start_document + */ +static VALUE start_document(VALUE self, VALUE version, VALUE tags, VALUE imp) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_version_directive_t version_directive; + + Check_Type(version, T_ARRAY); + + if(RARRAY_LEN(version) > 0) { + VALUE major = rb_ary_entry(version, (long)0); + VALUE minor = rb_ary_entry(version, (long)1); + + version_directive.major = NUM2INT(major); + version_directive.minor = NUM2INT(minor); + } + + yaml_tag_directive_t * head = NULL; + yaml_tag_directive_t * tail = NULL; + + if(RTEST(tags)) { + int i = 0; + + Check_Type(tags, T_ARRAY); + + head = xcalloc((size_t)RARRAY_LEN(tags), sizeof(yaml_tag_directive_t)); + tail = head; + + for(i = 0; i < RARRAY_LEN(tags); i++) { + VALUE tuple = RARRAY_PTR(tags)[i]; + Check_Type(tuple, T_ARRAY); + + if(RARRAY_LEN(tuple) < 2) { + xfree(head); + rb_raise(rb_eRuntimeError, "tag tuple must be of length 2"); + } + + tail->handle = (yaml_char_t *)StringValuePtr(RARRAY_PTR(tuple)[0]); + tail->prefix = (yaml_char_t *)StringValuePtr(RARRAY_PTR(tuple)[1]); + + tail++; + } + } + + yaml_event_t event; + yaml_document_start_event_initialize( + &event, + (RARRAY_LEN(version) > 0) ? &version_directive : NULL, + head, + tail, + imp ? 1 : 0 + ); + + emit(emitter, &event); + + if(head) xfree(head); + + return self; +} + +/* call-seq: emitter.end_document(implicit) + * + * End a document emission with an +implicit+ ending. + * + * See Psych::Handler#end_document + */ +static VALUE end_document(VALUE self, VALUE imp) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_document_end_event_initialize(&event, imp ? 1 : 0); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.scalar(value, anchor, tag, plain, quoted, style) + * + * Emit a scalar with +value+, +anchor+, +tag+, and a +plain+ or +quoted+ + * string type with +style+. + * + * See Psych::Handler#scalar + */ +static VALUE scalar( + VALUE self, + VALUE value, + VALUE anchor, + VALUE tag, + VALUE plain, + VALUE quoted, + VALUE style + ) { + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + Check_Type(value, T_STRING); + + yaml_event_t event; + yaml_scalar_event_initialize( + &event, + (yaml_char_t *)(NIL_P(anchor) ? NULL : StringValuePtr(anchor)), + (yaml_char_t *)(NIL_P(tag) ? NULL : StringValuePtr(tag)), + (yaml_char_t*)StringValuePtr(value), + (int)RSTRING_LEN(value), + plain ? 1 : 0, + quoted ? 1 : 0, + (yaml_scalar_style_t)NUM2INT(style) + ); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.start_sequence(anchor, tag, implicit, style) + * + * Start emitting a sequence with +anchor+, a +tag+, +implicit+ sequence + * start and end, along with +style+. + * + * See Psych::Handler#start_sequence + */ +static VALUE start_sequence( + VALUE self, + VALUE anchor, + VALUE tag, + VALUE implicit, + VALUE style + ) { + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_sequence_start_event_initialize( + &event, + (yaml_char_t *)(NIL_P(anchor) ? NULL : StringValuePtr(anchor)), + (yaml_char_t *)(NIL_P(tag) ? NULL : StringValuePtr(tag)), + implicit ? 1 : 0, + (yaml_sequence_style_t)NUM2INT(style) + ); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.end_sequence + * + * End sequence emission. + * + * See Psych::Handler#end_sequence + */ +static VALUE end_sequence(VALUE self) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_sequence_end_event_initialize(&event); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.start_mapping(anchor, tag, implicit, style) + * + * Start emitting a YAML map with +anchor+, +tag+, an +implicit+ start + * and end, and +style+. + * + * See Psych::Handler#start_mapping + */ +static VALUE start_mapping( + VALUE self, + VALUE anchor, + VALUE tag, + VALUE implicit, + VALUE style + ) { + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_mapping_start_event_initialize( + &event, + (yaml_char_t *)(NIL_P(anchor) ? NULL : StringValuePtr(anchor)), + (yaml_char_t *)(NIL_P(tag) ? NULL : StringValuePtr(tag)), + implicit ? 1 : 0, + (yaml_sequence_style_t)NUM2INT(style) + ); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.end_mapping + * + * Emit the end of a mapping. + * + * See Psych::Handler#end_mapping + */ +static VALUE end_mapping(VALUE self) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_mapping_end_event_initialize(&event); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.alias(anchor) + * + * Emit an alias with +anchor+. + * + * See Psych::Handler#alias + */ +static VALUE alias(VALUE self, VALUE anchor) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_event_t event; + yaml_alias_event_initialize( + &event, + (yaml_char_t *)(NIL_P(anchor) ? NULL : StringValuePtr(anchor)) + ); + + emit(emitter, &event); + + return self; +} + +/* call-seq: emitter.canonical = true + * + * Set the output style to canonical, or not. + */ +static VALUE set_canonical(VALUE self, VALUE style) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_emitter_set_canonical(emitter, Qtrue == style ? 1 : 0); + + return style; +} + +/* call-seq: emitter.canonical + * + * Get the output style, canonical or not. + */ +static VALUE canonical(VALUE self) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + return (emitter->canonical == 0) ? Qfalse : Qtrue; +} + +/* call-seq: emitter.indentation = level + * + * Set the indentation level to +level+. + */ +static VALUE set_indentation(VALUE self, VALUE level) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + yaml_emitter_set_indent(emitter, NUM2INT(level)); + + return level; +} + +/* call-seq: emitter.indentation + * + * Get the indentation level. + */ +static VALUE indentation(VALUE self) +{ + yaml_emitter_t * emitter; + Data_Get_Struct(self, yaml_emitter_t, emitter); + + return INT2NUM(emitter->best_indent); +} + +void Init_psych_emitter() +{ + VALUE psych = rb_define_module("Psych"); + VALUE handler = rb_define_class_under(psych, "Handler", rb_cObject); + cPsychEmitter = rb_define_class_under(psych, "Emitter", handler); + + rb_define_alloc_func(cPsychEmitter, allocate); + + rb_define_method(cPsychEmitter, "initialize", initialize, 1); + rb_define_method(cPsychEmitter, "start_stream", start_stream, 1); + rb_define_method(cPsychEmitter, "end_stream", end_stream, 0); + rb_define_method(cPsychEmitter, "start_document", start_document, 3); + rb_define_method(cPsychEmitter, "end_document", end_document, 1); + rb_define_method(cPsychEmitter, "scalar", scalar, 6); + rb_define_method(cPsychEmitter, "start_sequence", start_sequence, 4); + rb_define_method(cPsychEmitter, "end_sequence", end_sequence, 0); + rb_define_method(cPsychEmitter, "start_mapping", start_mapping, 4); + rb_define_method(cPsychEmitter, "end_mapping", end_mapping, 0); + rb_define_method(cPsychEmitter, "alias", alias, 1); + rb_define_method(cPsychEmitter, "canonical", canonical, 0); + rb_define_method(cPsychEmitter, "canonical=", set_canonical, 1); + rb_define_method(cPsychEmitter, "indentation", indentation, 0); + rb_define_method(cPsychEmitter, "indentation=", set_indentation, 1); + + id_write = rb_intern("write"); +} +/* vim: set noet sws=4 sw=4: */ |