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    1: /*************************************************************************
    2: * (C) 2017 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
    3: *  by Michael Pounov <misho@elwix.org>
    4: *
    5: * $Author: misho $
    6: * $Id: ajson.h,v 1.1.2.6 2017/11/28 02:00:45 misho Exp $
    7: *
    8: **************************************************************************
    9: The ELWIX and AITNET software is distributed under the following
   10: terms:
   11: 
   12: All of the documentation and software included in the ELWIX and AITNET
   13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
   14: 
   15: Copyright 2004 - 2017
   16: 	by Michael Pounov <misho@elwix.org>.  All rights reserved.
   17: 
   18: Redistribution and use in source and binary forms, with or without
   19: modification, are permitted provided that the following conditions
   20: are met:
   21: 1. Redistributions of source code must retain the above copyright
   22:    notice, this list of conditions and the following disclaimer.
   23: 2. Redistributions in binary form must reproduce the above copyright
   24:    notice, this list of conditions and the following disclaimer in the
   25:    documentation and/or other materials provided with the distribution.
   26: 3. All advertising materials mentioning features or use of this software
   27:    must display the following acknowledgement:
   28: This product includes software developed by Michael Pounov <misho@elwix.org>
   29: ELWIX - Embedded LightWeight unIX and its contributors.
   30: 4. Neither the name of AITNET nor the names of its contributors
   31:    may be used to endorse or promote products derived from this software
   32:    without specific prior written permission.
   33: 
   34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
   35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   37: ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   44: SUCH DAMAGE.
   45: */
   46: #ifndef __AJSON_H
   47: #define __AJSON_H
   48: 
   49: 
   50: /* JSON type identifiers */
   51: typedef enum {
   52: 	J_UNDEF = 0,
   53: 	J_OBJECT = 1,
   54: 	J_ARRAY = 2,
   55: 	J_STRING = 3,
   56: 	J_VALUE = 4
   57: } jtype_t;
   58: 
   59: /* JSON error numbers */
   60: typedef enum {
   61: 	J_ERR_OK = 0,
   62: 	J_ERR_NOMEM = 1,
   63: 	J_ERR_INVAL = 2,
   64: 	J_ERR_PART = 3,
   65: 	J_ERR_PARAM = 4
   66: } jerr_t;
   67: 
   68: typedef struct _tagHandler {
   69: 	unsigned long	h_pos;
   70: 	unsigned long	h_next;
   71: 	long		h_parent;
   72: 	void		*h_alloc;
   73: 	int		h_strict;
   74: } json_t;
   75: #define json_toksnum(x)		(x)->h_next
   76: 
   77: typedef struct _tagToken {
   78: 	jtype_t		tok_type;
   79: 	long		tok_start;
   80: 	long		tok_end;
   81: 	long		tok_size;
   82: 	long		tok_parent;
   83: } jtok_t;
   84: #define json_toktype(x)		(x)->tok_type
   85: #define json_toksize(x)		(x)->tok_size
   86: #define json_toklen(x)		((x)->tok_end - (x)->tok_start)
   87: #define json_tokstr(j, x)	((j) + (x)->tok_start)
   88: #define json_tokstrcpy(d, j, x)	{ strncpy((d), json_tokstr((j), (x)), json_toklen(x) - 1); \
   89: 					(d)[json_toklen(x)] = 0; } 
   90: 
   91: 
   92: /*
   93:  * json_init() - Initialize JSON handler
   94:  *
   95:  * @json = JSON handler, if there is NULL then dynamically will be allocated
   96:  * @jstrict = JSON strict mode, when we select strict mode every unquoted value is error
   97:  * return: =NULL error or !=NULL ready for use JSON handler and should be free with json_free()
   98:  */
   99: json_t *json_init(json_t * __restrict json, int jstrict);
  100: 
  101: /*
  102:  * json_free() - Free JSON handler
  103:  *
  104:  * @json = JSON handler
  105:  * return: none
  106:  */
  107: void json_free(json_t * __restrict json);
  108: 
  109: /*
  110:  * json_parse() - Parse JSON string
  111:  *
  112:  * @json = JSON handler
  113:  * @jstr = JSON string
  114:  * @jlen = JSON string length
  115:  * @jtoks = Token array
  116:  * @toksnum = Token array size, return number of allocated tokens in array
  117:  * return: -1 error or number of found tokens 
  118:  */
  119: unsigned int json_parse(json_t * __restrict json, const char *jstr, size_t jlen, 
  120: 		jtok_t * __restrict jtoks, unsigned int toksnum);
  121: 
  122: /*
  123:  * json_token2val() - Return token to AIT variable
  124:  *
  125:  * @jstr = JSON string
  126:  * @tok = Token for convert
  127:  * @return =NULL error or !=NULL variable, after use should be ait_freeVar()
  128:  */
  129: ait_val_t *json_token2val(const char *jstr, jtok_t * __restrict tok);
  130: /*
  131:  * json_token2str() - Return token to string
  132:  *
  133:  * @jstr = JSON string
  134:  * @tok = Token for convert
  135:  * @return =NULL error or !=NULL allocated str, after use should be e_free()
  136:  */
  137: char *json_token2str(const char *jstr, jtok_t * __restrict tok);
  138: /*
  139:  * json_token2num() - Return token to numeric
  140:  *
  141:  * @jstr = JSON string
  142:  * @tok = Token for convert
  143:  * @return number
  144:  */
  145: long json_token2num(const char *jstr, jtok_t * __restrict tok);
  146: /*
  147:  * json_token2array() - Convert token to array
  148:  *
  149:  * @jstr = JSON string
  150:  * @tok = Token for convert
  151:  * return: =NULL error or !=NULL allocated array with variables, 
  152:  * 		after use should be ait_freeVars()
  153:  */
  154: array_t *json_token2array(const char *jstr, jtok_t * __restrict tok);
  155: 
  156: /*
  157:  * json_findbykey() - Find data by key
  158:  *
  159:  * @jstr = JSON string
  160:  * @key = Search key
  161:  * @toks = Parsed tokens
  162:  * @toksnum = Number of parsed tokens
  163:  * return: =NULL error or !=NULL data token found 
  164:  */
  165: jtok_t *json_findbykey(const char *jstr, const char *key, 
  166: 		jtok_t * __restrict toks, int toksnum);
  167: 
  168: 
  169: #endif