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/*
* Copyright 2007, Lloyd Hilaiel.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. Neither the name of Lloyd Hilaiel nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "yajl_common.h"
#ifndef __YAJL_PARSE_H__
#define __YAJL_PARSE_H__
#ifdef __cplusplus
extern "C" {
#endif
/** error codes returned from this interface */
typedef enum {
yajl_status_ok,
yajl_status_client_canceled,
yajl_status_insufficient_data,
yajl_status_error
} yajl_status;
/** attain a human readable, english, string for an error */
const char * YAJL_API yajl_status_to_string(yajl_status code);
/** an opaque handle to a parser */
typedef struct yajl_handle_t * yajl_handle;
/** yajl is an event driven parser. this means as json elements are
* parsed, you are called back to do something with the data. The
* functions in this table indicate the various events for which
* you will be called back. Each callback accepts a "context"
* pointer, this is a void * that is passed into the yajl_parse
* function which the client code may use to pass around context.
*
* All callbacks return an integer. If non-zero, the parse will
* continue. If zero, the parse will be canceled and
* yajl_status_client_canceled will be returned from the parse.
*/
typedef struct {
int (* yajl_null)(void * ctx);
int (* yajl_boolean)(void * ctx, int boolVal);
int (* yajl_integer)(void * ctx, long integerVal);
int (* yajl_double)(void * ctx, double doubleVal);
/* strings are returned as pointers into the JSON text when,
* possible, they are not null padded */
int (* yajl_string)(void * ctx, const unsigned char * stringVal,
unsigned int stringLen);
int (* yajl_start_map)(void * ctx);
int (* yajl_map_key)(void * ctx, const unsigned char * key,
unsigned int stringLen);
int (* yajl_end_map)(void * ctx);
int (* yajl_start_array)(void * ctx);
int (* yajl_end_array)(void * ctx);
} yajl_callbacks;
/** configuration structure for the generator */
typedef struct {
/** if nonzero, javascript style comments will be allowed in
* the json input, both slash star and slash slash */
unsigned int allowComments;
} yajl_parser_config;
/** allocate a parser handle
* \param callbacks a yajl callbacks structure specifying the
* functions to call when different JSON entities
* are encountered in the input text. May be NULL,
* which is only useful for validation.
* \param config configuration parameters for the parse.
* \param ctx a context pointer that will be passed to callbacks.
*/
yajl_handle YAJL_API yajl_alloc(const yajl_callbacks * callbacks,
const yajl_parser_config * config,
void * ctx);
/** free a parser handle */
void YAJL_API yajl_free(yajl_handle handle);
/** parse some json! */
yajl_status YAJL_API yajl_parse(yajl_handle hand,
const unsigned char * jsonText,
unsigned int jsonTextLength);
/** get an error string describing the state of the
* parse.
*
* If verbose is non-zero, the message will include the JSON
* text where the error occured, along with an arrow pointing to
* the specific char.
*
* A dynamically allocated string will be returned which should
* be freed with yajl_free_error
*/
unsigned char * YAJL_API yajl_get_error(yajl_handle hand, int verbose,
const unsigned char * jsonText,
unsigned int jsonTextLength);
void YAJL_API yajl_free_error(unsigned char * str);
#ifdef __cplusplus
};
#endif
#endif
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