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/*
* Copyright (c) 2007-2014, Lloyd Hilaiel <me@lloyd.io>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "api/yajl_parse.h"
#include "yajl_lex.h"
#include "yajl_parser.h"
#include "yajl_alloc.h"
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
const char *
yajl_status_to_string(yajl_status stat)
{
const char * statStr = "unknown";
switch (stat) {
case yajl_status_ok:
statStr = "ok, no error";
break;
case yajl_status_client_canceled:
statStr = "client canceled parse";
break;
case yajl_status_error:
statStr = "parse error";
break;
}
return statStr;
}
yajl_handle
yajl_alloc(const yajl_callbacks * callbacks,
yajl_alloc_funcs * afs,
void * ctx)
{
yajl_handle hand = NULL;
yajl_alloc_funcs afsBuffer;
/* first order of business is to set up memory allocation routines */
if (afs != NULL) {
if (afs->malloc == NULL || afs->realloc == NULL || afs->free == NULL)
{
return NULL;
}
} else {
yajl_set_default_alloc_funcs(&afsBuffer);
afs = &afsBuffer;
}
hand = (yajl_handle) YA_MALLOC(afs, sizeof(struct yajl_handle_t));
if (hand == NULL) {
return NULL;
}
/* copy in pointers to allocation routines */
memcpy((void *) &(hand->alloc), (void *) afs, sizeof(yajl_alloc_funcs));
hand->callbacks = callbacks;
hand->ctx = ctx;
hand->lexer = NULL;
hand->bytesConsumed = 0;
hand->decodeBuf = yajl_buf_alloc(&(hand->alloc));
hand->flags = 0;
hand->memoryLimit = 0;
yajl_bs_init(hand->stateStack, &(hand->alloc));
yajl_bs_push(hand->stateStack, yajl_state_start);
return hand;
}
int
yajl_config(yajl_handle h, yajl_option opt, ...)
{
int rv = 1;
va_list ap;
va_start(ap, opt);
switch(opt) {
case yajl_allow_comments:
case yajl_dont_validate_strings:
case yajl_allow_trailing_garbage:
case yajl_allow_multiple_values:
case yajl_allow_partial_values:
if (va_arg(ap, int)) h->flags |= opt;
else h->flags &= ~opt;
break;
default:
rv = 0;
}
va_end(ap);
return rv;
}
/** set limit for total size of internal buffers */
void yajl_set_memory_limit(yajl_handle h, unsigned long limit)
{
h->memoryLimit = limit;
}
void
yajl_free(yajl_handle handle)
{
yajl_bs_free(handle->stateStack);
yajl_buf_free(handle->decodeBuf);
if (handle->lexer) {
yajl_lex_free(handle->lexer);
handle->lexer = NULL;
}
YA_FREE(&(handle->alloc), handle);
}
yajl_status
yajl_parse(yajl_handle hand, const unsigned char * jsonText,
size_t jsonTextLen)
{
yajl_status status;
/* lazy allocation of the lexer */
if (hand->lexer == NULL) {
hand->lexer = yajl_lex_alloc(&(hand->alloc),
hand->flags & yajl_allow_comments,
!(hand->flags & yajl_dont_validate_strings));
}
status = yajl_do_parse(hand, jsonText, jsonTextLen);
if (status == yajl_status_ok &&
hand->memoryLimit != 0 &&
yajl_buf_capacity(hand->decodeBuf) + yajl_lex_buf_capacity(hand->lexer) > hand->memoryLimit)
{
hand->parseError = "Out of memory (this is typically caused by an inefficient representation of strings in JSON)";
status = yajl_status_error;
yajl_bs_push(hand->stateStack, status);
}
return status;
}
yajl_status
yajl_complete_parse(yajl_handle hand)
{
/* The lexer is lazy allocated in the first call to parse. if parse is
* never called, then no data was provided to parse at all. This is a
* "premature EOF" error unless yajl_allow_partial_values is specified.
* allocating the lexer now is the simplest possible way to handle this
* case while preserving all the other semantics of the parser
* (multiple values, partial values, etc). */
if (hand->lexer == NULL) {
hand->lexer = yajl_lex_alloc(&(hand->alloc),
hand->flags & yajl_allow_comments,
!(hand->flags & yajl_dont_validate_strings));
}
return yajl_do_finish(hand);
}
unsigned char *
yajl_get_error(yajl_handle hand, int verbose,
const unsigned char * jsonText, size_t jsonTextLen)
{
return yajl_render_error_string(hand, jsonText, jsonTextLen, verbose);
}
size_t
yajl_get_bytes_consumed(yajl_handle hand)
{
if (!hand) return 0;
else return hand->bytesConsumed;
}
void
yajl_free_error(yajl_handle hand, unsigned char * str)
{
/* use memory allocation functions if set */
YA_FREE(&(hand->alloc), str);
}
/* XXX: add utility routines to parse from file */
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