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/*
* MessagePack for Ruby
*
* Copyright (C) 2008-2013 Sadayuki Furuhashi
*
* 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 "packer.h"
#include "buffer_class.h"
#if !defined(HAVE_RB_PROC_CALL_WITH_BLOCK)
#define rb_proc_call_with_block(recv, argc, argv, block) rb_funcallv(recv, rb_intern("call"), argc, argv)
#endif
void msgpack_packer_init(msgpack_packer_t* pk)
{
msgpack_buffer_init(PACKER_BUFFER_(pk));
}
void msgpack_packer_destroy(msgpack_packer_t* pk)
{
msgpack_buffer_destroy(PACKER_BUFFER_(pk));
}
void msgpack_packer_mark(msgpack_packer_t* pk)
{
/* See MessagePack_Buffer_wrap */
/* msgpack_buffer_mark(PACKER_BUFFER_(pk)); */
rb_gc_mark(pk->buffer_ref);
rb_gc_mark(pk->to_msgpack_arg);
}
void msgpack_packer_reset(msgpack_packer_t* pk)
{
msgpack_buffer_clear(PACKER_BUFFER_(pk));
pk->buffer_ref = Qnil;
}
void msgpack_packer_write_array_value(msgpack_packer_t* pk, VALUE v)
{
/* actual return type of RARRAY_LEN is long */
unsigned long len = RARRAY_LEN(v);
if(len > 0xffffffffUL) {
rb_raise(rb_eArgError, "size of array is too long to pack: %lu bytes should be <= %lu", len, 0xffffffffUL);
}
unsigned int len32 = (unsigned int)len;
msgpack_packer_write_array_header(pk, len32);
unsigned int i;
for(i=0; i < len32; ++i) {
VALUE e = rb_ary_entry(v, i);
msgpack_packer_write_value(pk, e);
}
}
static int write_hash_foreach(VALUE key, VALUE value, VALUE pk_value)
{
if (key == Qundef) {
return ST_CONTINUE;
}
msgpack_packer_t* pk = (msgpack_packer_t*) pk_value;
msgpack_packer_write_value(pk, key);
msgpack_packer_write_value(pk, value);
return ST_CONTINUE;
}
void msgpack_packer_write_hash_value(msgpack_packer_t* pk, VALUE v)
{
/* actual return type of RHASH_SIZE is long (if SIZEOF_LONG == SIZEOF_VOIDP
* or long long (if SIZEOF_LONG_LONG == SIZEOF_VOIDP. See st.h. */
unsigned long len = RHASH_SIZE(v);
if(len > 0xffffffffUL) {
rb_raise(rb_eArgError, "size of array is too long to pack: %ld bytes should be <= %lu", len, 0xffffffffUL);
}
unsigned int len32 = (unsigned int)len;
msgpack_packer_write_map_header(pk, len32);
rb_hash_foreach(v, write_hash_foreach, (VALUE) pk);
}
struct msgpack_call_proc_args_t;
typedef struct msgpack_call_proc_args_t msgpack_call_proc_args_t;
struct msgpack_call_proc_args_t {
VALUE proc;
VALUE args[2];
};
VALUE msgpack_packer_try_calling_proc(VALUE value)
{
msgpack_call_proc_args_t *args = (msgpack_call_proc_args_t *)value;
return rb_proc_call_with_block(args->proc, 2, args->args, Qnil);
}
bool msgpack_packer_try_write_with_ext_type_lookup(msgpack_packer_t* pk, VALUE v)
{
int ext_type, ext_flags;
VALUE proc = msgpack_packer_ext_registry_lookup(&pk->ext_registry, v, &ext_type, &ext_flags);
if(proc == Qnil) {
return false;
}
if(ext_flags & MSGPACK_EXT_RECURSIVE) {
VALUE held_buffer = MessagePack_Buffer_hold(&pk->buffer);
msgpack_buffer_t parent_buffer = pk->buffer;
msgpack_buffer_init(PACKER_BUFFER_(pk));
int exception_occured = 0;
msgpack_call_proc_args_t args = { proc, { v, pk->to_msgpack_arg } };
rb_protect(msgpack_packer_try_calling_proc, (VALUE)&args, &exception_occured);
if (exception_occured) {
msgpack_buffer_destroy(PACKER_BUFFER_(pk));
pk->buffer = parent_buffer;
rb_jump_tag(exception_occured); // re-raise the exception
} else {
VALUE payload = msgpack_buffer_all_as_string(PACKER_BUFFER_(pk));
StringValue(payload);
msgpack_buffer_destroy(PACKER_BUFFER_(pk));
pk->buffer = parent_buffer;
msgpack_packer_write_ext(pk, ext_type, payload);
}
RB_GC_GUARD(held_buffer);
} else {
VALUE payload = rb_proc_call_with_block(proc, 1, &v, Qnil);
StringValue(payload);
msgpack_packer_write_ext(pk, ext_type, payload);
}
return true;
}
void msgpack_packer_write_other_value(msgpack_packer_t* pk, VALUE v)
{
if(!(msgpack_packer_try_write_with_ext_type_lookup(pk, v))) {
rb_funcall(v, pk->to_msgpack_method, 1, pk->to_msgpack_arg);
}
}
void msgpack_packer_write_value(msgpack_packer_t* pk, VALUE v)
{
switch(rb_type(v)) {
case T_NIL:
msgpack_packer_write_nil(pk);
break;
case T_TRUE:
msgpack_packer_write_true(pk);
break;
case T_FALSE:
msgpack_packer_write_false(pk);
break;
case T_FIXNUM:
msgpack_packer_write_fixnum_value(pk, v);
break;
case T_SYMBOL:
msgpack_packer_write_symbol_value(pk, v);
break;
case T_STRING:
if(rb_class_of(v) == rb_cString || !msgpack_packer_try_write_with_ext_type_lookup(pk, v)) {
msgpack_packer_write_string_value(pk, v);
}
break;
case T_ARRAY:
if(rb_class_of(v) == rb_cArray || !msgpack_packer_try_write_with_ext_type_lookup(pk, v)) {
msgpack_packer_write_array_value(pk, v);
}
break;
case T_HASH:
if(rb_class_of(v) == rb_cHash || !msgpack_packer_try_write_with_ext_type_lookup(pk, v)) {
msgpack_packer_write_hash_value(pk, v);
}
break;
case T_BIGNUM:
msgpack_packer_write_bignum_value(pk, v);
break;
case T_FLOAT:
msgpack_packer_write_float_value(pk, v);
break;
default:
msgpack_packer_write_other_value(pk, v);
}
}
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