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json_parser.h
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json_parser.h
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#ifndef json_parser_h
#define json_parser_h 1
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _MSC_VER
# include <stddef.h>
#endif
#include <sys/types.h>
#ifndef JSON_PARSER_STRICT
# define JSON_PARSER_STRICT 1
#else
# define JSON_PARSER_STRICT 0
#endif
#ifndef JSON_PARSER_DEPTH
# define JSON_PARSER_DEPTH 100
#endif
typedef struct json_parser json_parser;
/* Callbacks should return non-zero to indicate an error. The parse will
* then halt execution.
*
* json_data_cb does not return data chunks. It will be call arbitrarilly
* many times for each string, same for on_int, on_frac and on on_exp. The and ofan in of a string
* will be signaled by a call to on_separator, between a key and a value, or between two values of
* an array or an object, or a call to on_end at the end of an array or an object.
*
*/
typedef int (*json_data_cb) (json_parser*, const char *at, size_t length);
typedef int (*json_cb) (json_parser*);
/* How much state to encode at each state level, currently 3 */
#define JSON_PARSER_STACK_BIT_PER_LEVEL 1
#define JSON_PARSER_STACK_SIZE (JSON_PARSER_DEPTH/(sizeof(char)*(8>>(JSON_PARSER_STACK_BIT_PER_LEVEL-1)))+1)
struct json_parser {
unsigned short state;
size_t stack_size;
size_t nread;
unsigned short stop_on_callback : 1;
unsigned short error : 1;
void *data;
const char *data_mark;
size_t data_size;
json_cb on_array_begin;
json_cb on_object_begin;
json_data_cb on_string;
json_cb on_end;
/* numbers */
json_cb on_separator;
json_cb on_minus;
json_data_cb on_int;
json_data_cb on_frac;
json_data_cb on_exp;
unsigned char stack[JSON_PARSER_STACK_SIZE];
};
void json_parser_init(json_parser *);
size_t json_parser_execute(json_parser *, const char *data, size_t len,
size_t depth);
#ifdef __cplusplus
}
#endif
#endif