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/*
* MessagePack for C unpacking routine
*
* Copyright (C) 2008-2009 FURUHASHI Sadayuki
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
*/
#include "msgpack/unpack.h"
#include "msgpack/unpack_define.h"
#include "msgpack/util.h"
#include <stdlib.h>
#ifdef _msgpack_atomic_counter_header
#include _msgpack_atomic_counter_header
#endif
typedef struct {
msgpack_zone* z;
bool referenced;
} unpack_user;
#define msgpack_unpack_struct(name) \
struct template ## name
#define msgpack_unpack_func(ret, name) \
ret template ## name
#define msgpack_unpack_callback(name) \
template_callback ## name
#define msgpack_unpack_object msgpack_object
#define msgpack_unpack_user unpack_user
struct template_context;
typedef struct template_context template_context;
static void template_init(template_context* ctx);
static msgpack_object template_data(template_context* ctx);
static int template_execute(
template_context* ctx, const char* data, size_t len, size_t* off);
static inline msgpack_object template_callback_root(unpack_user* u)
{
msgpack_object o;
MSGPACK_UNUSED(u);
o.type = MSGPACK_OBJECT_NIL;
return o;
}
static inline int template_callback_uint8(unpack_user* u, uint8_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = d;
return 0;
}
static inline int template_callback_uint16(unpack_user* u, uint16_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = d;
return 0;
}
static inline int template_callback_uint32(unpack_user* u, uint32_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = d;
return 0;
}
static inline int template_callback_uint64(unpack_user* u, uint64_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = d;
return 0;
}
static inline int template_callback_int8(unpack_user* u, int8_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
if(d >= 0) {
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = (uint64_t)d;
return 0;
}
else {
o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
o->via.i64 = d;
return 0;
}
}
static inline int template_callback_int16(unpack_user* u, int16_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
if(d >= 0) {
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = (uint64_t)d;
return 0;
}
else {
o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
o->via.i64 = d;
return 0;
}
}
static inline int template_callback_int32(unpack_user* u, int32_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
if(d >= 0) {
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = (uint64_t)d;
return 0;
}
else {
o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
o->via.i64 = d;
return 0;
}
}
static inline int template_callback_int64(unpack_user* u, int64_t d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
if(d >= 0) {
o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
o->via.u64 = (uint64_t)d;
return 0;
}
else {
o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
o->via.i64 = d;
return 0;
}
}
static inline int template_callback_float(unpack_user* u, float d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_FLOAT32;
o->via.f64 = d;
return 0;
}
static inline int template_callback_double(unpack_user* u, double d, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_FLOAT64;
o->via.f64 = d;
return 0;
}
static inline int template_callback_nil(unpack_user* u, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_NIL;
return 0;
}
static inline int template_callback_true(unpack_user* u, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_BOOLEAN;
o->via.boolean = true;
return 0;
}
static inline int template_callback_false(unpack_user* u, msgpack_object* o)
{
MSGPACK_UNUSED(u);
o->type = MSGPACK_OBJECT_BOOLEAN;
o->via.boolean = false;
return 0;
}
static inline int template_callback_array(unpack_user* u, unsigned int n, msgpack_object* o)
{
unsigned int size;
o->type = MSGPACK_OBJECT_ARRAY;
o->via.array.size = 0;
size = n*sizeof(msgpack_object);
if (size / sizeof(msgpack_object) != n) {
// integer overflow
return MSGPACK_UNPACK_NOMEM_ERROR;
}
o->via.array.ptr = (msgpack_object*)msgpack_zone_malloc(u->z, size);
if(o->via.array.ptr == NULL) { return MSGPACK_UNPACK_NOMEM_ERROR; }
return 0;
}
static inline int template_callback_array_item(unpack_user* u, msgpack_object* c, msgpack_object o)
{
MSGPACK_UNUSED(u);
#if defined(__GNUC__) && !defined(__clang__)
memcpy(&c->via.array.ptr[c->via.array.size], &o, sizeof(msgpack_object));
#else /* __GNUC__ && !__clang__ */
c->via.array.ptr[c->via.array.size] = o;
#endif /* __GNUC__ && !__clang__ */
++c->via.array.size;
return 0;
}
static inline int template_callback_map(unpack_user* u, unsigned int n, msgpack_object* o)
{
unsigned int size;
o->type = MSGPACK_OBJECT_MAP;
o->via.map.size = 0;
size = n*sizeof(msgpack_object_kv);
if (size / sizeof(msgpack_object_kv) != n) {
// integer overflow
return MSGPACK_UNPACK_NOMEM_ERROR;
}
o->via.map.ptr = (msgpack_object_kv*)msgpack_zone_malloc(u->z, size);
if(o->via.map.ptr == NULL) { return MSGPACK_UNPACK_NOMEM_ERROR; }
return 0;
}
static inline int template_callback_map_item(unpack_user* u, msgpack_object* c, msgpack_object k, msgpack_object v)
{
MSGPACK_UNUSED(u);
#if defined(__GNUC__) && !defined(__clang__)
memcpy(&c->via.map.ptr[c->via.map.size].key, &k, sizeof(msgpack_object));
memcpy(&c->via.map.ptr[c->via.map.size].val, &v, sizeof(msgpack_object));
#else /* __GNUC__ && !__clang__ */
c->via.map.ptr[c->via.map.size].key = k;
c->via.map.ptr[c->via.map.size].val = v;
#endif /* __GNUC__ && !__clang__ */
++c->via.map.size;
return 0;
}
static inline int template_callback_str(unpack_user* u, const char* b, const char* p, unsigned int l, msgpack_object* o)
{
MSGPACK_UNUSED(u);
MSGPACK_UNUSED(b);
o->type = MSGPACK_OBJECT_STR;
o->via.str.ptr = p;
o->via.str.size = l;
u->referenced = true;
return 0;
}
static inline int template_callback_bin(unpack_user* u, const char* b, const char* p, unsigned int l, msgpack_object* o)
{
MSGPACK_UNUSED(u);
MSGPACK_UNUSED(b);
o->type = MSGPACK_OBJECT_BIN;
o->via.bin.ptr = p;
o->via.bin.size = l;
u->referenced = true;
return 0;
}
static inline int template_callback_ext(unpack_user* u, const char* b, const char* p, unsigned int l, msgpack_object* o)
{
if (l == 0) {
return MSGPACK_UNPACK_PARSE_ERROR;
}
MSGPACK_UNUSED(u);
MSGPACK_UNUSED(b);
o->type = MSGPACK_OBJECT_EXT;
o->via.ext.type = *p;
o->via.ext.ptr = p + 1;
o->via.ext.size = l - 1;
u->referenced = true;
return 0;
}
#include "msgpack/unpack_template.h"
#define CTX_CAST(m) ((template_context*)(m))
#define CTX_REFERENCED(mpac) CTX_CAST((mpac)->ctx)->user.referenced
#define COUNTER_SIZE (sizeof(_msgpack_atomic_counter_t))
static inline void init_count(void* buffer)
{
*(volatile _msgpack_atomic_counter_t*)buffer = 1;
}
static inline void decr_count(void* buffer)
{
// atomic if(--*(_msgpack_atomic_counter_t*)buffer == 0) { free(buffer); }
if(_msgpack_sync_decr_and_fetch((volatile _msgpack_atomic_counter_t*)buffer) == 0) {
free(buffer);
}
}
static inline void incr_count(void* buffer)
{
// atomic ++*(_msgpack_atomic_counter_t*)buffer;
_msgpack_sync_incr_and_fetch((volatile _msgpack_atomic_counter_t*)buffer);
}
static inline _msgpack_atomic_counter_t get_count(void* buffer)
{
return *(volatile _msgpack_atomic_counter_t*)buffer;
}
bool msgpack_unpacker_init(msgpack_unpacker* mpac, size_t initial_buffer_size)
{
char* buffer;
void* ctx;
msgpack_zone* z;
if(initial_buffer_size < COUNTER_SIZE) {
initial_buffer_size = COUNTER_SIZE;
}
buffer = (char*)malloc(initial_buffer_size);
if(buffer == NULL) {
return false;
}
ctx = malloc(sizeof(template_context));
if(ctx == NULL) {
free(buffer);
return false;
}
z = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
if(z == NULL) {
free(ctx);
free(buffer);
return false;
}
mpac->buffer = buffer;
mpac->used = COUNTER_SIZE;
mpac->free = initial_buffer_size - mpac->used;
mpac->off = COUNTER_SIZE;
mpac->parsed = 0;
mpac->initial_buffer_size = initial_buffer_size;
mpac->z = z;
mpac->ctx = ctx;
init_count(mpac->buffer);
template_init(CTX_CAST(mpac->ctx));
CTX_CAST(mpac->ctx)->user.z = mpac->z;
CTX_CAST(mpac->ctx)->user.referenced = false;
return true;
}
void msgpack_unpacker_destroy(msgpack_unpacker* mpac)
{
msgpack_zone_free(mpac->z);
free(mpac->ctx);
decr_count(mpac->buffer);
}
msgpack_unpacker* msgpack_unpacker_new(size_t initial_buffer_size)
{
msgpack_unpacker* mpac = (msgpack_unpacker*)malloc(sizeof(msgpack_unpacker));
if(mpac == NULL) {
return NULL;
}
if(!msgpack_unpacker_init(mpac, initial_buffer_size)) {
free(mpac);
return NULL;
}
return mpac;
}
void msgpack_unpacker_free(msgpack_unpacker* mpac)
{
msgpack_unpacker_destroy(mpac);
free(mpac);
}
bool msgpack_unpacker_expand_buffer(msgpack_unpacker* mpac, size_t size)
{
if(mpac->used == mpac->off && get_count(mpac->buffer) == 1
&& !CTX_REFERENCED(mpac)) {
// rewind buffer
mpac->free += mpac->used - COUNTER_SIZE;
mpac->used = COUNTER_SIZE;
mpac->off = COUNTER_SIZE;
if(mpac->free >= size) {
return true;
}
}
if(mpac->off == COUNTER_SIZE) {
char* tmp;
size_t next_size = (mpac->used + mpac->free) * 2; // include COUNTER_SIZE
while(next_size < size + mpac->used) {
size_t tmp_next_size = next_size * 2;
if (tmp_next_size <= next_size) {
next_size = size + mpac->used;
break;
}
next_size = tmp_next_size;
}
tmp = (char*)realloc(mpac->buffer, next_size);
if(tmp == NULL) {
return false;
}
mpac->buffer = tmp;
mpac->free = next_size - mpac->used;
} else {
char* tmp;
size_t next_size = mpac->initial_buffer_size; // include COUNTER_SIZE
size_t not_parsed = mpac->used - mpac->off;
while(next_size < size + not_parsed + COUNTER_SIZE) {
size_t tmp_next_size = next_size * 2;
if (tmp_next_size <= next_size) {
next_size = size + not_parsed + COUNTER_SIZE;
break;
}
next_size = tmp_next_size;
}
tmp = (char*)malloc(next_size);
if(tmp == NULL) {
return false;
}
init_count(tmp);
memcpy(tmp+COUNTER_SIZE, mpac->buffer+mpac->off, not_parsed);
if(CTX_REFERENCED(mpac)) {
if(!msgpack_zone_push_finalizer(mpac->z, decr_count, mpac->buffer)) {
free(tmp);
return false;
}
CTX_REFERENCED(mpac) = false;
} else {
decr_count(mpac->buffer);
}
mpac->buffer = tmp;
mpac->used = not_parsed + COUNTER_SIZE;
mpac->free = next_size - mpac->used;
mpac->off = COUNTER_SIZE;
}
return true;
}
int msgpack_unpacker_execute(msgpack_unpacker* mpac)
{
size_t off = mpac->off;
int ret = template_execute(CTX_CAST(mpac->ctx),
mpac->buffer, mpac->used, &mpac->off);
if(mpac->off > off) {
mpac->parsed += mpac->off - off;
}
return ret;
}
msgpack_object msgpack_unpacker_data(msgpack_unpacker* mpac)
{
return template_data(CTX_CAST(mpac->ctx));
}
msgpack_zone* msgpack_unpacker_release_zone(msgpack_unpacker* mpac)
{
msgpack_zone* r;
msgpack_zone* old;
if(!msgpack_unpacker_flush_zone(mpac)) {
return NULL;
}
r = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
if(r == NULL) {
return NULL;
}
old = mpac->z;
mpac->z = r;
CTX_CAST(mpac->ctx)->user.z = mpac->z;
return old;
}
void msgpack_unpacker_reset_zone(msgpack_unpacker* mpac)
{
msgpack_zone_clear(mpac->z);
}
bool msgpack_unpacker_flush_zone(msgpack_unpacker* mpac)
{
if(CTX_REFERENCED(mpac)) {
if(!msgpack_zone_push_finalizer(mpac->z, decr_count, mpac->buffer)) {
return false;
}
CTX_REFERENCED(mpac) = false;
incr_count(mpac->buffer);
}
return true;
}
void msgpack_unpacker_reset(msgpack_unpacker* mpac)
{
template_init(CTX_CAST(mpac->ctx));
// don't reset referenced flag
mpac->parsed = 0;
}
static inline msgpack_unpack_return unpacker_next(msgpack_unpacker* mpac,
msgpack_unpacked* result)
{
int ret;
msgpack_unpacked_destroy(result);
ret = msgpack_unpacker_execute(mpac);
if(ret < 0) {
result->zone = NULL;
memset(&result->data, 0, sizeof(msgpack_object));
return ret;
}
if(ret == 0) {
return MSGPACK_UNPACK_CONTINUE;
}
result->zone = msgpack_unpacker_release_zone(mpac);
result->data = msgpack_unpacker_data(mpac);
return MSGPACK_UNPACK_SUCCESS;
}
msgpack_unpack_return msgpack_unpacker_next(msgpack_unpacker* mpac,
msgpack_unpacked* result)
{
int ret;
ret = unpacker_next(mpac, result);
if (ret == MSGPACK_UNPACK_SUCCESS) {
msgpack_unpacker_reset(mpac);
}
return ret;
}
msgpack_unpack_return
msgpack_unpacker_next_with_size(msgpack_unpacker* mpac,
msgpack_unpacked* result, size_t *p_bytes)
{
int ret;
ret = unpacker_next(mpac, result);
if (ret == MSGPACK_UNPACK_SUCCESS || ret == MSGPACK_UNPACK_CONTINUE) {
*p_bytes = mpac->parsed;
}
if (ret == MSGPACK_UNPACK_SUCCESS) {
msgpack_unpacker_reset(mpac);
}
return ret;
}
msgpack_unpack_return
msgpack_unpack(const char* data, size_t len, size_t* off,
msgpack_zone* result_zone, msgpack_object* result)
{
size_t noff = 0;
if(off != NULL) { noff = *off; }
if(len <= noff) {
// FIXME
return MSGPACK_UNPACK_CONTINUE;
}
else {
int e;
template_context ctx;
template_init(&ctx);
ctx.user.z = result_zone;
ctx.user.referenced = false;
e = template_execute(&ctx, data, len, &noff);
if(e < 0) {
return e;
}
if(off != NULL) { *off = noff; }
if(e == 0) {
return MSGPACK_UNPACK_CONTINUE;
}
*result = template_data(&ctx);
if(noff < len) {
return MSGPACK_UNPACK_EXTRA_BYTES;
}
return MSGPACK_UNPACK_SUCCESS;
}
}
msgpack_unpack_return
msgpack_unpack_next(msgpack_unpacked* result,
const char* data, size_t len, size_t* off)
{
size_t noff = 0;
msgpack_unpacked_destroy(result);
if(off != NULL) { noff = *off; }
if(len <= noff) {
return MSGPACK_UNPACK_CONTINUE;
}
if (!result->zone) {
result->zone = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
}
if (!result->zone) {
return MSGPACK_UNPACK_NOMEM_ERROR;
}
else {
int e;
template_context ctx;
template_init(&ctx);
ctx.user.z = result->zone;
ctx.user.referenced = false;
e = template_execute(&ctx, data, len, &noff);
if(off != NULL) { *off = noff; }
if(e < 0) {
msgpack_zone_free(result->zone);
result->zone = NULL;
return e;
}
if(e == 0) {
return MSGPACK_UNPACK_CONTINUE;
}
result->data = template_data(&ctx);
return MSGPACK_UNPACK_SUCCESS;
}
}
#if defined(MSGPACK_OLD_COMPILER_BUS_ERROR_WORKAROUND)
// FIXME: Dirty hack to avoid a bus error caused by OS X's old gcc.
static void dummy_function_to_avoid_bus_error()
{
}
#endif