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/*
* MessagePack unpacking routine for Ruby
*
* Copyright (C) 2008 FURUHASHI Sadayuki
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ruby.h"
#include "unpack_context.h"
#include <stdio.h>
#define UNPACKER(from, name) \
msgpack_unpacker *name = NULL; \
Data_Get_Struct(from, msgpack_unpacker, name); \
if(name == NULL) { \
rb_raise(rb_eArgError, "NULL found for " # name " when shouldn't be."); \
}
#define CHECK_STRING_TYPE(value) \
value = rb_check_string_type(value); \
if( NIL_P(value) ) { \
rb_raise(rb_eTypeError, "instance of String needed"); \
}
static VALUE cUnpacker;
static VALUE eUnpackError;
static void MessagePack_Unpacker_free(void* data)
{
if(data) { free(data); }
}
static void MessagePack_Unpacker_mark(msgpack_unpacker *mp)
{
unsigned int i;
for(i=0; i < mp->top; ++i) {
rb_gc_mark(mp->stack[i].obj);
rb_gc_mark(mp->stack[i].tmp.map_key);
}
}
static VALUE MessagePack_Unpacker_alloc(VALUE klass)
{
VALUE obj;
msgpack_unpacker* mp = ALLOC_N(msgpack_unpacker, 1);
obj = Data_Wrap_Struct(klass, MessagePack_Unpacker_mark,
MessagePack_Unpacker_free, mp);
return obj;
}
static VALUE MessagePack_Unpacker_reset(VALUE self)
{
UNPACKER(self, mp);
mp->user.finished = false;
msgpack_unpacker_init(mp);
return self;
}
static VALUE MessagePack_Unpacker_initialize(VALUE self)
{
return MessagePack_Unpacker_reset(self);
}
static VALUE MessagePack_Unpacker_execute_impl(VALUE args)
{
VALUE self = ((VALUE*)args)[0];
VALUE data = ((VALUE*)args)[1];
VALUE off = ((VALUE*)args)[2];
UNPACKER(self, mp);
size_t from = NUM2UINT(off);
char* dptr = RSTRING_PTR(data);
long dlen = RSTRING_LEN(data);
int ret;
if(from >= dlen) {
rb_raise(eUnpackError, "Requested start is after data buffer end.");
}
ret = msgpack_unpacker_execute(mp, dptr, (size_t)dlen, &from);
if(ret < 0) {
rb_raise(eUnpackError, "Parse error.");
} else if(ret > 0) {
mp->user.finished = true;
return ULONG2NUM(from);
} else {
mp->user.finished = false;
return ULONG2NUM(from);
}
}
static VALUE MessagePack_Unpacker_execute_rescue(VALUE nouse)
{
rb_gc_enable();
#ifdef RUBY_VM
rb_exc_raise(rb_errinfo());
#else
rb_exc_raise(ruby_errinfo);
#endif
}
static VALUE MessagePack_Unpacker_execute(VALUE self, VALUE data, VALUE off)
{
// FIXME execute実行中はmp->topが更新されないのでGC markが機能しない
rb_gc_disable();
VALUE args[3] = {self, data, off};
VALUE ret = rb_rescue(MessagePack_Unpacker_execute_impl, (VALUE)args,
MessagePack_Unpacker_execute_rescue, Qnil);
rb_gc_enable();
return ret;
}
static VALUE MessagePack_Unpacker_finished_p(VALUE self)
{
UNPACKER(self, mp);
if(mp->user.finished) {
return Qtrue;
}
return Qfalse;
}
static VALUE MessagePack_Unpacker_data(VALUE self)
{
UNPACKER(self, mp);
return msgpack_unpacker_data(mp);
}
static VALUE MessagePack_unpack_impl(VALUE args)
{
msgpack_unpacker* mp = (msgpack_unpacker*)((VALUE*)args)[0];
VALUE data = ((VALUE*)args)[1];
size_t from = 0;
char* dptr = RSTRING_PTR(data);
long dlen = RSTRING_LEN(data);
int ret;
ret = msgpack_unpacker_execute(mp, dptr, (size_t)dlen, &from);
if(ret < 0) {
rb_raise(eUnpackError, "Parse error.");
} else if(ret == 0) {
rb_raise(eUnpackError, "Insufficient bytes.");
} else {
if(from < dlen) {
rb_raise(eUnpackError, "Extra bytes.");
}
return msgpack_unpacker_data(mp);
}
}
static VALUE MessagePack_unpack_rescue(VALUE args)
{
rb_gc_enable();
#ifdef RUBY_VM
rb_exc_raise(rb_errinfo());
#else
rb_exc_raise(ruby_errinfo);
#endif
}
static VALUE MessagePack_unpack(VALUE self, VALUE data)
{
CHECK_STRING_TYPE(data);
msgpack_unpacker mp;
msgpack_unpacker_init(&mp);
rb_gc_disable();
VALUE args[2] = {(VALUE)&mp, data};
VALUE ret = rb_rescue(MessagePack_unpack_impl, (VALUE)args,
MessagePack_unpack_rescue, Qnil);
rb_gc_enable();
return ret;
}
void Init_msgpack_unpack(VALUE mMessagePack)
{
eUnpackError = rb_define_class_under(mMessagePack, "UnpackError", rb_eStandardError);
cUnpacker = rb_define_class_under(mMessagePack, "Unpacker", rb_cObject);
rb_define_alloc_func(cUnpacker, MessagePack_Unpacker_alloc);
rb_define_method(cUnpacker, "initialize", MessagePack_Unpacker_initialize, 0);
rb_define_method(cUnpacker, "execute", MessagePack_Unpacker_execute, 2);
rb_define_method(cUnpacker, "finished?", MessagePack_Unpacker_finished_p, 0);
rb_define_method(cUnpacker, "data", MessagePack_Unpacker_data, 0);
rb_define_method(cUnpacker, "reset", MessagePack_Unpacker_reset, 0);
rb_define_module_function(mMessagePack, "unpack", MessagePack_unpack, 1);
}
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