Annotation of libelwix/inc/elwix/ajson.h, revision 1.4
1.2 misho 1: /*************************************************************************
2: * (C) 2017 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
1.4 ! misho 6: * $Id: ajson.h,v 1.3.4.1 2018/03/07 12:26:38 misho Exp $
1.2 misho 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:
1.4 ! misho 15: Copyright 2004 - 2018
1.2 misho 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: long tok_idx;
79: jtype_t tok_type;
80: long tok_start;
81: long tok_end;
82: long tok_size;
83: long tok_parent;
84: } jtok_t;
85: #define json_toktype(x) (x)->tok_type
86: #define json_toksize(x) (x)->tok_size
87: #define json_toklen(x) ((x)->tok_end - (x)->tok_start)
88: #define json_tokstr(j, x) ((j) + (x)->tok_start)
89: #define json_tokstrcpy(d, j, x) { strncpy((d), json_tokstr((j), (x)), json_toklen(x)); \
90: (d)[json_toklen(x)] = 0; }
91:
92:
93: /*
94: * json_init() - Initialize JSON handler
95: *
96: * @json = JSON handler, if there is NULL then dynamically will be allocated
97: * @jstrict = JSON strict mode, when we select strict mode every unquoted value is error
98: * return: =NULL error or !=NULL ready for use JSON handler and should be free with json_free()
99: */
100: json_t *json_init(json_t * __restrict json, int jstrict);
101:
102: /*
103: * json_free() - Free JSON handler
104: *
105: * @json = JSON handler
106: * return: none
107: */
108: void json_free(json_t * __restrict json);
109:
110: /*
111: * json_parse() - Parse JSON string
112: *
113: * @json = JSON handler
114: * @jstr = JSON string
115: * @jlen = JSON string length
116: * @jtoks = Token array
117: * @toksnum = Token array size, return number of allocated tokens in array
118: * return: -1 error or number of found tokens
119: */
120: unsigned int json_parse(json_t * __restrict json, const char *jstr, size_t jlen,
121: jtok_t * __restrict jtoks, unsigned int toksnum);
122:
123: /*
124: * json_token2val() - Return token to AIT variable
125: *
126: * @jstr = JSON string
127: * @tok = Token for convert
128: * @return =NULL error or !=NULL variable, after use should be ait_freeVar()
129: */
130: ait_val_t *json_token2val(const char *jstr, jtok_t * __restrict tok);
131: /*
132: * json_token2str() - Return token to string
133: *
134: * @jstr = JSON string
135: * @tok = Token for convert
136: * @return =NULL error or !=NULL allocated str, after use should be e_free()
137: */
138: char *json_token2str(const char *jstr, jtok_t * __restrict tok);
139: /*
140: * json_token2num() - Return token to numeric
141: *
142: * @jstr = JSON string
143: * @tok = Token for convert
144: * @return number
145: */
146: long json_token2num(const char *jstr, jtok_t * __restrict tok);
147: /*
148: * json_token2array() - Convert token to string array
149: *
150: * @jstr = JSON string
151: * @tok = Token for convert
152: * return: =NULL error or !=NULL allocated array with string variables,
153: * after use should be ait_freeVars()
154: */
155: array_t *json_token2array(const char *jstr, jtok_t * __restrict tok);
156:
157: /*
158: * json_findbykey() - Find data by key
159: *
160: * @jstr = JSON string
161: * @key = Search key
1.4 ! misho 162: * @type = Search key for particular token type, if is J_UNDEF this mean any type
1.2 misho 163: * @toks = Parsed tokens
164: * @toksnum = Number of parsed tokens
165: * return: =NULL error or !=NULL data token found
166: */
167: jtok_t *json_findbykey(const char *jstr, const char *key,
1.4 ! misho 168: jtype_t type, jtok_t * __restrict toks, int toksnum);
1.3 misho 169:
170:
171: /*
172: * json_dump_yaml() - Dump parsed JSON string to YAML format
173: *
174: * @f = Output handler
175: * @jstr = JSON string
176: * @toks = JSON tokens
177: * @toksnum = Number of tokens
178: * @indent = Start indent spaces
179: * return: 0 done and 1 added one more item
180: */
181: int json_dump_yaml(FILE *f, const char *jstr, jtok_t *toks, int toksnum, int indent);
1.2 misho 182:
183:
184: /*
185: * json_add_begin_object() - Adds begin of object {
186: *
187: * @jstr = JSON string
188: * @jlen = JSON string length
189: * @wspace = whitespace include
190: * return: -1 error or !=-1 actual JSON string length
191: */
192: int json_add_begin_object(char * __restrict jstr, int jlen, int wspace);
193: /*
194: * json_add_end_object() - Adds end of object }
195: *
196: * @jstr = JSON string
197: * @jlen = JSON string length
198: * @wspace = whitespace include
199: * return: -1 error or !=-1 actual JSON string length
200: */
201: int json_add_end_object(char * __restrict jstr, int jlen, int wspace);
202: /*
203: * json_add_begin_array() - Adds begin of array [
204: *
205: * @jstr = JSON string
206: * @jlen = JSON string length
207: * @wspace = whitespace include
208: * return: -1 error or !=-1 actual JSON string length
209: */
210: int json_add_begin_array(char * __restrict jstr, int jlen, int wspace);
211: /*
212: * json_add_end_array() - Adds end of array ]
213: *
214: * @jstr = JSON string
215: * @jlen = JSON string length
216: * @wspace = whitespace include
217: * return: -1 error or !=-1 actual JSON string length
218: */
219: int json_add_end_array(char * __restrict jstr, int jlen, int wspace);
220: /*
221: * json_add_char() - Adds character
222: *
223: * @jstr = JSON string
224: * @jlen = JSON string length
225: * @ch = Character
226: * return: -1 error or !=-1 actual JSON string length
227: */
228: int json_add_char(char * __restrict jstr, int jlen, unsigned char ch);
229: /*
230: * json_add_colon() - Adds key/value pair delimiter colon :
231: *
232: * @jstr = JSON string
233: * @jlen = JSON string length
234: * @wspace = whitespace include
235: * return: -1 error or !=-1 actual JSON string length
236: */
237: int json_add_colon(char * __restrict jstr, int jlen, int wspace);
238: /*
239: * json_add_comma() - Adds value delimiter comma ,
240: *
241: * @jstr = JSON string
242: * @jlen = JSON string length
243: * @wspace = whitespace include
244: * return: -1 error or !=-1 actual JSON string length
245: */
246: int json_add_comma(char * __restrict jstr, int jlen, int wspace);
247: /*
248: * json_add_string() - Adds string
249: *
250: * @jstr = JSON string
251: * @jlen = JSON string length
252: * @unquot = Unquoted string
253: * @str = String, it can't be NULL
254: * return: -1 error or !=-1 actual JSON string length
255: */
256: int json_add_string(char * __restrict jstr, int jlen, int unquot, const char *str);
257: /*
258: * json_add_value() - Adds value
259: *
260: * @jstr = JSON string
261: * @jlen = JSON string length
262: * @unquot = Unquoted number
263: * @num = Number
264: * return: -1 error or !=-1 actual JSON string length
265: */
266: int json_add_value(char * __restrict jstr, int jlen, int unquot, long num);
267: /*
268: * json_add_pair() - Adds key/value pair
269: *
270: * @jstr = JSON string
271: * @jlen = JSON string length
272: * @wspace = whitespace include
273: * @key = Key string
274: * @val = Value string
275: * return: -1 error or !=-1 actual JSON string length
276: */
277: int json_add_pair(char * __restrict jstr, int jlen, int wspace,
278: const char *key, const char *val);
279: /*
280: * json_add_array() - Adds array
281: *
282: * @jstr = JSON string
283: * @jlen = JSON string length
284: * @wspace = whitespace include
285: * @arr = Array with variables
286: * return: -1 error or !=-1 actual JSON string length
287: */
288: int json_add_array(char * __restrict jstr, int jlen, int wspace,
289: array_t * __restrict arr);
290:
291:
292: #endif
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