1: /*************************************************************************
2: * (C) 2017 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
6: * $Id: json.c,v 1.4.6.1 2018/04/16 14:02:35 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 - 2018
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: #include "global.h"
47:
48:
49: /* JSON error strings */
50: const char *jerrstr[] = {
51: "No error",
52: "Not enough tokens were provided",
53: "Invalid character",
54: "JSON string isn't full",
55: "Invalid parameter",
56: NULL
57: };
58:
59:
60: /*
61: * json_init() - Initialize JSON handler
62: *
63: * @json = JSON handler, if there is NULL then dynamically will be allocated
64: * @jstrict = JSON strict mode, when we select strict mode every unquoted value is error
65: * return: =NULL error or !=NULL ready for use JSON handler and should be free with json_free()
66: */
67: json_t *
68: json_init(json_t * __restrict json, int jstrict)
69: {
70: json_t *j = json;
71:
72: if (!j) {
73: j = e_malloc(sizeof(json_t));
74: if (!j) {
75: LOGERR;
76: return NULL;
77: }
78: }
79:
80: memset(j, 0, sizeof(json_t));
81: j->h_parent = -1;
82: j->h_strict = jstrict;
83:
84: /* handler is dynamically allocated! */
85: if (!json)
86: j->h_alloc = j;
87:
88: return j;
89: }
90:
91: /*
92: * json_free() - Free JSON handler
93: *
94: * @json = JSON handler
95: * return: none
96: */
97: void
98: json_free(json_t * __restrict json)
99: {
100: if (json) {
101: if (json->h_alloc)
102: e_free(json);
103: else
104: memset(json, 0, sizeof(json_t));
105: }
106: }
107:
108: static jtok_t *
109: json_gettoken(json_t * __restrict json, jtok_t * __restrict jtoks, u_int toksnum)
110: {
111: jtok_t *tok;
112:
113: assert(json || !(!jtoks && toksnum));
114:
115: if (json->h_next >= toksnum) {
116: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
117: return NULL;
118: } else
119: tok = &jtoks[json->h_next];
120: tok->tok_idx = json->h_next++;
121: tok->tok_start = tok->tok_end = tok->tok_parent = -1;
122: tok->tok_size = 0;
123:
124: return tok;
125: }
126:
127: inline void
128: json_filltoken(jtok_t * __restrict tok, jtype_t type, long start, long end, long parent)
129: {
130: assert(tok);
131:
132: tok->tok_type = type;
133: tok->tok_start = start;
134: tok->tok_end = end;
135: tok->tok_parent = parent;
136: tok->tok_size = 0;
137: }
138:
139: static int
140: json_parse_string(json_t * __restrict json, const char *jstr, size_t jlen, jtok_t * __restrict jtoks, u_int toksnum)
141: {
142: jtok_t *tok;
143: u_long pos;
144: char ch;
145: register int i;
146:
147: assert(json || jstr || !(!jtoks && toksnum));
148:
149: for (pos = json->h_pos++; json->h_pos < jlen && jstr[json->h_pos]; json->h_pos++) {
150: ch = jstr[json->h_pos];
151:
152: if (ch == '\"') {
153: if (!jtoks)
154: return 0;
155: if (!(tok = json_gettoken(json, jtoks, toksnum))) {
156: json->h_pos = pos;
157: return -1;
158: } else
159: json_filltoken(tok, J_STRING, pos + 1, json->h_pos, json->h_parent);
160: return 0;
161: }
162:
163: if (ch == '\\' && json->h_pos + 1 < jlen) {
164: switch (jstr[++json->h_pos]) {
165: case '\"':
166: case '/':
167: case '\\':
168: case 'b':
169: case 'f':
170: case 'r':
171: case 'n':
172: case 't':
173: /* Allowed escaped symbols */
174: break;
175: case 'u':
176: /* Allows escaped symbol \uXXXX */
177: json->h_pos++;
178: for (i = 0; i < 4 && json->h_pos < jlen && jstr[json->h_pos]; i++, json->h_pos++) {
179: /* If it isn't a hex character we have an error */
180: if (!((jstr[json->h_pos] >= 48 && jstr[json->h_pos] <= 57) || /* 0-9 */
181: (jstr[json->h_pos] >= 65 && jstr[json->h_pos] <= 70) || /* A-F */
182: (jstr[json->h_pos] >= 97 && jstr[json->h_pos] <= 102))) { /* a-f */
183: json->h_pos = pos;
184: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
185: return -1;
186: }
187: }
188: json->h_pos--;
189: break;
190: default:
191: /* Unexpected symbol */
192: json->h_pos = pos;
193: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
194: return -1;
195: }
196: }
197: }
198:
199: json->h_pos = pos;
200: elwix_SetErr(J_ERR_PART, "%s", jerrstr[J_ERR_PART]);
201: return -1;
202: }
203:
204: static int
205: json_parse_value(json_t * __restrict json, const char *jstr, size_t jlen, jtok_t * __restrict jtoks, u_int toksnum)
206: {
207: jtok_t *tok;
208: u_long pos;
209:
210: assert(json || jstr || !(!jtoks && toksnum));
211:
212: for (pos = json->h_pos; json->h_pos < jlen && jstr[json->h_pos]; json->h_pos++) {
213: switch (jstr[json->h_pos]) {
214: case ':':
215: if (json->h_strict)
216: goto found;
217: break;
218: case '\t':
219: case '\r':
220: case '\n':
221: case ' ':
222: case ',':
223: case ']':
224: case '}':
225: goto found;
226: }
227: if (jstr[json->h_pos] < 32 || jstr[json->h_pos] > 127) {
228: json->h_pos = pos;
229: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
230: return -1;
231: }
232: }
233:
234: if (json->h_strict) {
235: json->h_pos = pos;
236: elwix_SetErr(J_ERR_PART, "%s", jerrstr[J_ERR_PART]);
237: return -1;
238: }
239: found:
240: if (jtoks) {
241: if (!(tok = json_gettoken(json, jtoks, toksnum))) {
242: json->h_pos = pos;
243: return -1;
244: } else
245: json_filltoken(tok, J_VALUE, pos, json->h_pos, json->h_parent);
246: }
247:
248: json->h_pos--;
249: return 0;
250: }
251:
252: /*
253: * json_parse() - Parse JSON string
254: *
255: * @json = JSON handler
256: * @jstr = JSON string
257: * @jlen = JSON string length
258: * @jtoks = Token array
259: * @toksnum = Token array size, return number of allocated tokens in array
260: * return: -1 error or number of found tokens
261: */
262: u_int
263: json_parse(json_t * __restrict json, const char *jstr, size_t jlen, jtok_t * __restrict jtoks, u_int toksnum)
264: {
265: register int i;
266: register u_int cx;
267: jtype_t type;
268: jtok_t *tok;
269: char ch;
270:
271: if (!json || !jstr || (!jtoks && toksnum)) {
272: elwix_SetErr(J_ERR_PARAM, "%s", jerrstr[J_ERR_PARAM]);
273: return (u_int) -1;
274: }
275:
276: for (cx = json->h_next; json->h_pos < jlen && jstr[json->h_pos]; json->h_pos++) {
277: switch ((ch = jstr[json->h_pos])) {
278: case '{':
279: case '[':
280: cx++; /* start new object/array token */
281: if (!jtoks)
282: break;
283:
284: tok = json_gettoken(json, jtoks, toksnum);
285: if (!tok)
286: return (u_int) -1;
287: if (json->h_parent != -1) {
288: jtoks[json->h_parent].tok_size++;
289: tok->tok_parent = json->h_parent;
290: }
291: tok->tok_type = (ch == '{' ? J_OBJECT : J_ARRAY);
292: tok->tok_start = json->h_pos;
293: json->h_parent = json->h_next - 1;
294: break;
295: case '}':
296: case ']':
297: if (!jtoks)
298: break;
299:
300: if (json->h_next < 1) {
301: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
302: return (u_int) -1;
303: }
304:
305: type = (ch == '}' ? J_OBJECT : J_ARRAY);
306: tok = &jtoks[json->h_next - 1];
307: while (42) {
308: if (tok->tok_start != -1 && tok->tok_end == -1) {
309: if (tok->tok_type != type) {
310: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
311: return (u_int) -1;
312: }
313: tok->tok_end = json->h_pos + 1;
314: json->h_parent = tok->tok_parent;
315: break;
316: }
317: if (tok->tok_parent == -1) {
318: if (tok->tok_type != type || json->h_parent == -1) {
319: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
320: return (u_int) -1;
321: }
322: break;
323: }
324: tok = &jtoks[tok->tok_parent];
325: }
326: break;
327: case '\"':
328: if (json_parse_string(json, jstr, jlen, jtoks, toksnum) == -1)
329: return (u_int) -1;
330: cx++; /* start new string token */
331: if (jtoks && json->h_parent != -1)
332: jtoks[json->h_parent].tok_size++;
333: break;
334: case '\t':
335: case '\r':
336: case '\n':
337: case ' ':
338: /* whitespace, skip */
339: break;
340: case ':':
341: json->h_parent = json->h_next - 1;
342: break;
343: case ',':
344: if (jtoks && json->h_parent != -1 &&
345: jtoks[json->h_parent].tok_type != J_OBJECT &&
346: jtoks[json->h_parent].tok_type != J_ARRAY)
347: json->h_parent = jtoks[json->h_parent].tok_parent;
348: break;
349: case '-':
350: case '0':
351: case '1':
352: case '2':
353: case '3':
354: case '4':
355: case '5':
356: case '6':
357: case '7':
358: case '8':
359: case '9':
360: case 't':
361: case 'f':
362: case 'n':
363: if (json->h_strict) {
364: if (jtoks && json->h_parent != -1) {
365: /* they must not be keys of the object */
366: if (jtoks[json->h_parent].tok_type == J_OBJECT ||
367: (jtoks[json->h_parent].tok_type == J_STRING &&
368: jtoks[json->h_parent].tok_size)) {
369: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
370: return (u_int) -1;
371: }
372: }
373:
374: if (json_parse_value(json, jstr, jlen, jtoks, toksnum) == -1)
375: return (u_int) -1;
376: cx++; /* start new value token */
377: if (jtoks && json->h_parent != -1)
378: jtoks[json->h_parent].tok_size++;
379: break;
380: }
381: default:
382: if (json->h_strict) {
383: elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
384: return (u_int) -1;
385: }
386:
387: if (json_parse_value(json, jstr, jlen, jtoks, toksnum) == -1)
388: return (u_int) -1;
389: cx++; /* start new value token */
390: if (jtoks && json->h_parent != -1)
391: jtoks[json->h_parent].tok_size++;
392: break;
393: }
394: }
395:
396: if (jtoks) {
397: for (i = json->h_next - 1; i >= 0; i--) {
398: /* unmatched opened object or array */
399: if (jtoks[i].tok_start != -1 && jtoks[i].tok_end == -1) {
400: elwix_SetErr(J_ERR_PART, "%s", jerrstr[J_ERR_PART]);
401: return (u_int) -1;
402: }
403: }
404: } else
405: cx++; /* increment needed tokens number for termination empty token */
406:
407: return cx;
408: }
409:
410: /*
411: * json_token2val() - Return token to AIT variable
412: *
413: * @jstr = JSON string
414: * @tok = Token for convert
415: * @return =NULL error or !=NULL allocated variable, after use should be ait_freeVar()
416: */
417: ait_val_t *
418: json_token2val(const char *jstr, jtok_t * __restrict tok)
419: {
420: ait_val_t *v = NULL;
421:
422: if (!jstr || !tok)
423: return NULL;
424:
425: v = ait_allocVar();
426: if (!v)
427: return NULL;
428:
429: AIT_SET_STRSIZ(v, json_toklen(tok));
430: strncpy(AIT_GET_STR(v), json_tokstr(jstr, tok), AIT_LEN(v) - 1);
431:
432: return v;
433: }
434:
435: /*
436: * json_token2str() - Return token to string
437: *
438: * @jstr = JSON string
439: * @tok = Token for convert
440: * @return =NULL error or !=NULL allocated str, after use should be json_freestr()|e_free()
441: */
442: char *
443: json_token2str(const char *jstr, jtok_t * __restrict tok)
444: {
445: char *str = NULL;
446: size_t len;
447:
448: if (!jstr || !tok)
449: return NULL;
450:
451: len = json_toklen(tok);
452: str = e_malloc(len + 1);
453: if (!str)
454: return NULL;
455: else {
456: strncpy(str, json_tokstr(jstr, tok), len);
457: str[len] = 0;
458: }
459:
460: return str;
461: }
462:
463: /*
464: * json_token2num() - Return token to numeric
465: *
466: * @jstr = JSON string
467: * @tok = Token for convert
468: * @return number
469: */
470: long
471: json_token2num(const char *jstr, jtok_t * __restrict tok)
472: {
473: long ret = 0;
474: char *str;
475:
476: str = json_token2str(jstr, tok);
477: if (!str)
478: return 0;
479:
480: ret = strtol(str, NULL, 0);
481: e_free(str);
482: return ret;
483: }
484:
485: /*
486: * json_token2dbl() - Return token to double
487: *
488: * @jstr = JSON string
489: * @tok = Token for convert
490: * @return number
491: */
492: double
493: json_token2dbl(const char *jstr, jtok_t * __restrict tok)
494: {
495: long ret = 0;
496: char *str;
497:
498: str = json_token2str(jstr, tok);
499: if (!str)
500: return 0;
501:
502: ret = strtod(str, NULL);
503: e_free(str);
504: return ret;
505: }
506:
507: /*
508: * json_findbykey() - Find data by key
509: *
510: * @jstr = JSON string
511: * @key = Search key
512: * @type = Search key for particular token type, if is J_UNDEF this mean any type
513: * @toks = Parsed tokens
514: * @toksnum = Number of parsed tokens
515: * return: =NULL error or !=NULL data token found
516: */
517: jtok_t *
518: json_findbykey(const char *jstr, const char *key, jtype_t type, jtok_t * __restrict toks, int toksnum)
519: {
520: jtok_t *tok = NULL;
521: register int i;
522: int klen;
523:
524: if (!jstr || !key || !toks)
525: return NULL;
526: else
527: klen = strlen(key);
528:
529: for (i = 1; i < toksnum; i++) {
530: if (toks[i].tok_type == J_STRING &&
531: klen == toks[i].tok_end - toks[i].tok_start &&
532: !strncmp(jstr + toks[i].tok_start, key, klen)) {
533: if (type != J_UNDEF) {
534: if (toks[i + 1].tok_type == type) {
535: tok = toks + i + 1;
536: break;
537: }
538: } else {
539: tok = toks + i + 1;
540: break;
541: }
542: }
543: }
544:
545: return tok;
546: }
547:
548: /*
549: * json_token2array() - Convert token to string array
550: *
551: * @jstr = JSON string
552: * @tok = Token for convert
553: * return: =NULL error or !=NULL allocated array with string variables,
554: * after use should be ait_freeVars()
555: */
556: array_t *
557: json_token2array(const char *jstr, jtok_t * __restrict tok)
558: {
559: array_t *arr = NULL;
560: register int i;
561: int siz;
562: ait_val_t *v;
563: jtok_t *t;
564:
565: if (!jstr || !tok)
566: return NULL;
567:
568: siz = tok->tok_size;
569: if (!siz && json_toktype(tok) != J_ARRAY && json_toktype(tok) != J_OBJECT)
570: siz++;
571:
572: arr = ait_allocVars(siz);
573: if (!arr)
574: return NULL;
575:
576: if (tok->tok_type == J_STRING || tok->tok_type == J_VALUE) {
577: v = ait_getVars(&arr, 0);
578: AIT_SET_STRSIZ(v, json_toklen(tok) + 1);
579: json_tokstrcpy(AIT_GET_STR(v), jstr, tok);
580: } else if (tok->tok_type == J_ARRAY) {
581: for (i = 0; i < tok->tok_size; i++) {
582: t = &tok[i + 1];
583: v = ait_getVars(&arr, i);
584: AIT_SET_STRSIZ(v, json_toklen(t) + 1);
585: json_tokstrcpy(AIT_GET_STR(v), jstr, t);
586: }
587: } else if (tok->tok_type == J_OBJECT) {
588: for (i = 0; tok->tok_idx <= tok[i + 1].tok_parent; i++) {
589: t = &tok[i + 1];
590: v = ait_getVars(&arr, i);
591: AIT_SET_STRSIZ(v, json_toklen(t) + 1);
592: json_tokstrcpy(AIT_GET_STR(v), jstr, t);
593: }
594: } else {
595: elwix_SetErr(J_ERR_PARAM, "%s", jerrstr[J_ERR_PARAM]);
596: ait_freeVars(&arr);
597: return NULL;
598: }
599:
600: return arr;
601: }
602:
603:
604:
605: /*
606: * json_add_begin_object() - Adds begin of object {
607: *
608: * @jstr = JSON string
609: * @jlen = JSON string length
610: * @wspace = whitespace include
611: * return: -1 error or !=-1 actual JSON string length
612: */
613: int
614: json_add_begin_object(char * __restrict jstr, int jlen, int wspace)
615: {
616: int len;
617: size_t eos;
618:
619: if (!jstr)
620: return -1;
621: else
622: eos = strlen(jstr);
623:
624:
625: if (wspace)
626: len = strlcat(jstr, "{ ", jlen);
627: else
628: len = strlcat(jstr, "{", jlen);
629:
630: if (len >= jlen) {
631: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
632: jstr[eos] = 0;
633: return -1;
634: }
635:
636: return len;
637: }
638:
639: /*
640: * json_add_end_object() - Adds end of object }
641: *
642: * @jstr = JSON string
643: * @jlen = JSON string length
644: * @wspace = whitespace include
645: * return: -1 error or !=-1 actual JSON string length
646: */
647: int
648: json_add_end_object(char * __restrict jstr, int jlen, int wspace)
649: {
650: int len;
651: size_t eos;
652:
653: if (!jstr)
654: return -1;
655: else
656: eos = strlen(jstr);
657:
658: if (wspace)
659: len = strlcat(jstr, " }", jlen);
660: else
661: len = strlcat(jstr, "}", jlen);
662:
663: if (len >= jlen) {
664: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
665: jstr[eos] = 0;
666: return -1;
667: }
668:
669: return len;
670: }
671:
672: /*
673: * json_add_begin_array() - Adds begin of array [
674: *
675: * @jstr = JSON string
676: * @jlen = JSON string length
677: * @wspace = whitespace include
678: * return: -1 error or !=-1 actual JSON string length
679: */
680: int
681: json_add_begin_array(char * __restrict jstr, int jlen, int wspace)
682: {
683: int len;
684: size_t eos;
685:
686: if (!jstr)
687: return -1;
688: else
689: eos = strlen(jstr);
690:
691: if (wspace)
692: len = strlcat(jstr, "[ ", jlen);
693: else
694: len = strlcat(jstr, "[", jlen);
695:
696: if (len >= jlen) {
697: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
698: jstr[eos] = 0;
699: return -1;
700: }
701:
702: return len;
703: }
704:
705: /*
706: * json_add_end_array() - Adds end of array ]
707: *
708: * @jstr = JSON string
709: * @jlen = JSON string length
710: * @wspace = whitespace include
711: * return: -1 error or !=-1 actual JSON string length
712: */
713: int
714: json_add_end_array(char * __restrict jstr, int jlen, int wspace)
715: {
716: int len;
717: size_t eos;
718:
719: if (!jstr)
720: return -1;
721: else
722: eos = strlen(jstr);
723:
724: if (wspace)
725: len = strlcat(jstr, " ]", jlen);
726: else
727: len = strlcat(jstr, "]", jlen);
728:
729: if (len >= jlen) {
730: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
731: jstr[eos] = 0;
732: return -1;
733: }
734:
735: return len;
736: }
737:
738: /*
739: * json_add_char() - Adds character
740: *
741: * @jstr = JSON string
742: * @jlen = JSON string length
743: * @ch = Character
744: * return: -1 error or !=-1 actual JSON string length
745: */
746: int
747: json_add_char(char * __restrict jstr, int jlen, u_char ch)
748: {
749: int len;
750:
751: if (!jstr)
752: return -1;
753:
754: len = strlen(jstr) + 1;
755: if (len >= jlen) {
756: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
757: return -1;
758: } else {
759: jstr[len++] = (char) ch;
760: jstr[len] = 0;
761: }
762:
763: return len;
764: }
765:
766: /*
767: * json_add_colon() - Adds key/value pair delimiter colon :
768: *
769: * @jstr = JSON string
770: * @jlen = JSON string length
771: * @wspace = whitespace include
772: * return: -1 error or !=-1 actual JSON string length
773: */
774: int
775: json_add_colon(char * __restrict jstr, int jlen, int wspace)
776: {
777: int len;
778: size_t eos;
779:
780: if (!jstr)
781: return -1;
782: else
783: eos = strlen(jstr);
784:
785: if (wspace)
786: len = strlcat(jstr, ": ", jlen);
787: else
788: len = strlcat(jstr, ":", jlen);
789:
790: if (len >= jlen) {
791: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
792: jstr[eos] = 0;
793: return -1;
794: }
795:
796: return len;
797: }
798:
799: /*
800: * json_add_comma() - Adds value delimiter comma ,
801: *
802: * @jstr = JSON string
803: * @jlen = JSON string length
804: * @wspace = whitespace include
805: * return: -1 error or !=-1 actual JSON string length
806: */
807: int
808: json_add_comma(char * __restrict jstr, int jlen, int wspace)
809: {
810: int len;
811: size_t eos;
812:
813: if (!jstr)
814: return -1;
815: else
816: eos = strlen(jstr);
817:
818: if (wspace)
819: len = strlcat(jstr, ", ", jlen);
820: else
821: len = strlcat(jstr, ",", jlen);
822:
823: if (len >= jlen) {
824: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
825: jstr[eos] = 0;
826: return -1;
827: }
828:
829: return len;
830: }
831:
832: /*
833: * json_add_string() - Adds string
834: *
835: * @jstr = JSON string
836: * @jlen = JSON string length
837: * @unquot = Unquoted string
838: * @str = String, it can't be NULL
839: * return: -1 error or !=-1 actual JSON string length
840: */
841: int
842: json_add_string(char * __restrict jstr, int jlen, int unquot, const char *str)
843: {
844: int len;
845: size_t eos;
846:
847: if (!jstr || !str)
848: return -1;
849: else
850: eos = strlen(jstr);
851:
852: if (!unquot) {
853: len = strlcat(jstr, "\"", jlen);
854: if (len >= jlen) {
855: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
856: jstr[eos] = 0;
857: return -1;
858: }
859: }
860: len = strlcat(jstr, str, jlen);
861: if (len >= jlen) {
862: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
863: jstr[eos] = 0;
864: return -1;
865: }
866: if (!unquot) {
867: len = strlcat(jstr, "\"", jlen);
868: if (len >= jlen) {
869: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
870: jstr[eos] = 0;
871: return -1;
872: }
873: }
874:
875: return len;
876: }
877:
878: /*
879: * json_add_value() - Adds value
880: *
881: * @jstr = JSON string
882: * @jlen = JSON string length
883: * @unquot = Unquoted number
884: * @num = Number
885: * return: -1 error or !=-1 actual JSON string length
886: */
887: int
888: json_add_value(char * __restrict jstr, int jlen, int unquot, long num)
889: {
890: int len;
891: char wrk[STRSIZ] = { [0 ... STRSIZ - 1] = 0 };
892: size_t eos;
893:
894: if (!jstr)
895: return -1;
896: else
897: eos = strlen(jstr);
898:
899: if (!unquot) {
900: len = strlcat(jstr, "\"", jlen);
901: if (len >= jlen) {
902: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
903: jstr[eos] = 0;
904: return -1;
905: }
906: }
907: snprintf(wrk, sizeof wrk, "%ld", num);
908: len = strlcat(jstr, wrk, jlen);
909: if (len >= jlen) {
910: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
911: jstr[eos] = 0;
912: return -1;
913: }
914: if (!unquot) {
915: len = strlcat(jstr, "\"", jlen);
916: if (len >= jlen) {
917: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
918: jstr[eos] = 0;
919: return -1;
920: }
921: }
922:
923: return len;
924: }
925:
926: /*
927: * json_add_pair() - Adds key/value pair
928: *
929: * @jstr = JSON string
930: * @jlen = JSON string length
931: * @wspace = whitespace include
932: * @key = Key string
933: * @val = Value string
934: * return: -1 error or !=-1 actual JSON string length
935: */
936: int
937: json_add_pair(char * __restrict jstr, int jlen, int wspace, const char *key, const char *val)
938: {
939: int len = -1;
940: size_t eos;
941:
942: if (!jstr || !key || !val)
943: return -1;
944: else
945: eos = strlen(jstr);
946:
947: if (json_add_string(jstr, jlen, 0, key) == -1) {
948: jstr[eos] = 0;
949: return -1;
950: }
951: if (json_add_colon(jstr, jlen, wspace) == -1) {
952: jstr[eos] = 0;
953: return -1;
954: }
955: if ((len = json_add_string(jstr, jlen, 0, val)) == -1) {
956: jstr[eos] = 0;
957: return -1;
958: }
959:
960: return len;
961: }
962:
963: /*
964: * json_add_array() - Adds array
965: *
966: * @jstr = JSON string
967: * @jlen = JSON string length
968: * @wspace = whitespace include
969: * @arr = Array with variables
970: * return: -1 error or !=-1 actual JSON string length
971: */
972: int
973: json_add_array(char * __restrict jstr, int jlen, int wspace, array_t * __restrict arr)
974: {
975: int len = -1;
976: register int i;
977: ait_val_t *v;
978: size_t eos;
979:
980: if (!jstr || !arr)
981: return -1;
982: else
983: eos = strlen(jstr);
984:
985: if (json_add_begin_array(jstr, jlen, wspace) == -1) {
986: jstr[eos] = 0;
987: return -1;
988: }
989: for (i = 0; i < array_Size(arr); i++) {
990: v = array(arr, i, ait_val_t*);
991: if (v) {
992: if (AIT_TYPE(v) == string) {
993: if (json_add_string(jstr, jlen, 0, AIT_GET_STR(v)) == -1) {
994: jstr[eos] = 0;
995: return -1;
996: }
997: } else {
998: if (json_add_value(jstr, jlen, 0, AIT_GET_LIKE(v, long)) == -1) {
999: jstr[eos] = 0;
1000: return -1;
1001: }
1002: }
1003: if (i < array_Size(arr) - 1 && json_add_comma(jstr, jlen, wspace) == -1) {
1004: jstr[eos] = 0;
1005: return -1;
1006: }
1007: }
1008: }
1009: if ((len = json_add_end_array(jstr, jlen, wspace)) == -1) {
1010: jstr[eos] = 0;
1011: return -1;
1012: }
1013:
1014: return len;
1015: }
1016:
1017: /*
1018: * json_dump_yaml() - Dump parsed JSON string to YAML format
1019: *
1020: * @f = Output handler
1021: * @jstr = JSON string
1022: * @toks = JSON tokens
1023: * @toksnum = Number of tokens
1024: * @indent = Start indent spaces
1025: * return: 0 done and 1 added one more item
1026: */
1027: int
1028: json_dump_yaml(FILE *f, const char *jstr, jtok_t *toks, int toksnum, int indent)
1029: {
1030: register int i, j, k;
1031:
1032: if (!toksnum)
1033: return 0;
1034:
1035: if (toks->tok_type == J_VALUE) {
1036: fprintf(f, "%.*s", (int) json_toklen(toks), json_tokstr(jstr, toks));
1037: return 1;
1038: } else if (toks->tok_type == J_STRING) {
1039: fprintf(f, "%.*s", (int) json_toklen(toks), json_tokstr(jstr, toks));
1040: return 1;
1041: } else if (toks->tok_type == J_OBJECT) {
1042: fprintf(f, "\n");
1043: for (j = i = 0; i < json_toksize(toks); i++) {
1044: for (k = 0; k < indent; k++)
1045: fprintf(f, " ");
1046: j += json_dump_yaml(f, jstr, toks + j + 1, toksnum - j, indent + 1);
1047: fprintf(f, ": ");
1048: j += json_dump_yaml(f, jstr, toks + j + 1, toksnum - j, indent + 1);
1049: fprintf(f, "\n");
1050: }
1051: return j + 1;
1052: } else if (toks->tok_type == J_ARRAY) {
1053: fprintf(f, "\n");
1054: for (j = i = 0; i < json_toksize(toks); i++) {
1055: for (k = 0; k < indent - 1; k++)
1056: fprintf(f, " ");
1057: fprintf(f, " - ");
1058: j += json_dump_yaml(f, jstr, toks + j + 1, toksnum - j, indent + 1);
1059: fprintf(f, "\n");
1060: }
1061: return j + 1;
1062: }
1063:
1064: return 0;
1065: }
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