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 2018/03/07 12:29:28 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 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_findbykey() - Find data by key
487: *
488: * @jstr = JSON string
489: * @key = Search key
490: * @type = Search key for particular token type, if is J_UNDEF this mean any type
491: * @toks = Parsed tokens
492: * @toksnum = Number of parsed tokens
493: * return: =NULL error or !=NULL data token found
494: */
495: jtok_t *
496: json_findbykey(const char *jstr, const char *key, jtype_t type, jtok_t * __restrict toks, int toksnum)
497: {
498: jtok_t *tok = NULL;
499: register int i;
500: int klen;
501:
502: if (!jstr || !key || !toks)
503: return NULL;
504: else
505: klen = strlen(key);
506:
507: for (i = 1; i < toksnum; i++) {
508: if (toks[i].tok_type == J_STRING &&
509: klen == toks[i].tok_end - toks[i].tok_start &&
510: !strncmp(jstr + toks[i].tok_start, key, klen)) {
511: if (type != J_UNDEF) {
512: if (toks[i + 1].tok_type == type) {
513: tok = toks + i + 1;
514: break;
515: }
516: } else {
517: tok = toks + i + 1;
518: break;
519: }
520: }
521: }
522:
523: return tok;
524: }
525:
526: /*
527: * json_token2array() - Convert token to string array
528: *
529: * @jstr = JSON string
530: * @tok = Token for convert
531: * return: =NULL error or !=NULL allocated array with string variables,
532: * after use should be ait_freeVars()
533: */
534: array_t *
535: json_token2array(const char *jstr, jtok_t * __restrict tok)
536: {
537: array_t *arr = NULL;
538: register int i;
539: int siz;
540: ait_val_t *v;
541: jtok_t *t;
542:
543: if (!jstr || !tok)
544: return NULL;
545:
546: siz = tok->tok_size;
547: if (!siz && json_toktype(tok) != J_ARRAY && json_toktype(tok) != J_OBJECT)
548: siz++;
549:
550: arr = ait_allocVars(siz);
551: if (!arr)
552: return NULL;
553:
554: if (tok->tok_type == J_STRING || tok->tok_type == J_VALUE) {
555: v = ait_getVars(&arr, 0);
556: AIT_SET_STRSIZ(v, json_toklen(tok) + 1);
557: json_tokstrcpy(AIT_GET_STR(v), jstr, tok);
558: } else if (tok->tok_type == J_ARRAY) {
559: for (i = 0; i < tok->tok_size; i++) {
560: t = &tok[i + 1];
561: v = ait_getVars(&arr, i);
562: AIT_SET_STRSIZ(v, json_toklen(t) + 1);
563: json_tokstrcpy(AIT_GET_STR(v), jstr, t);
564: }
565: } else if (tok->tok_type == J_OBJECT) {
566: for (i = 0; tok->tok_idx <= tok[i + 1].tok_parent; i++) {
567: t = &tok[i + 1];
568: v = ait_getVars(&arr, i);
569: AIT_SET_STRSIZ(v, json_toklen(t) + 1);
570: json_tokstrcpy(AIT_GET_STR(v), jstr, t);
571: }
572: } else {
573: elwix_SetErr(J_ERR_PARAM, "%s", jerrstr[J_ERR_PARAM]);
574: ait_freeVars(&arr);
575: return NULL;
576: }
577:
578: return arr;
579: }
580:
581:
582:
583: /*
584: * json_add_begin_object() - Adds begin of object {
585: *
586: * @jstr = JSON string
587: * @jlen = JSON string length
588: * @wspace = whitespace include
589: * return: -1 error or !=-1 actual JSON string length
590: */
591: int
592: json_add_begin_object(char * __restrict jstr, int jlen, int wspace)
593: {
594: int len;
595: size_t eos;
596:
597: if (!jstr)
598: return -1;
599: else
600: eos = strlen(jstr);
601:
602:
603: if (wspace)
604: len = strlcat(jstr, "{ ", jlen);
605: else
606: len = strlcat(jstr, "{", jlen);
607:
608: if (len >= jlen) {
609: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
610: jstr[eos] = 0;
611: return -1;
612: }
613:
614: return len;
615: }
616:
617: /*
618: * json_add_end_object() - Adds end of object }
619: *
620: * @jstr = JSON string
621: * @jlen = JSON string length
622: * @wspace = whitespace include
623: * return: -1 error or !=-1 actual JSON string length
624: */
625: int
626: json_add_end_object(char * __restrict jstr, int jlen, int wspace)
627: {
628: int len;
629: size_t eos;
630:
631: if (!jstr)
632: return -1;
633: else
634: eos = strlen(jstr);
635:
636: if (wspace)
637: len = strlcat(jstr, " }", jlen);
638: else
639: len = strlcat(jstr, "}", jlen);
640:
641: if (len >= jlen) {
642: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
643: jstr[eos] = 0;
644: return -1;
645: }
646:
647: return len;
648: }
649:
650: /*
651: * json_add_begin_array() - Adds begin of array [
652: *
653: * @jstr = JSON string
654: * @jlen = JSON string length
655: * @wspace = whitespace include
656: * return: -1 error or !=-1 actual JSON string length
657: */
658: int
659: json_add_begin_array(char * __restrict jstr, int jlen, int wspace)
660: {
661: int len;
662: size_t eos;
663:
664: if (!jstr)
665: return -1;
666: else
667: eos = strlen(jstr);
668:
669: if (wspace)
670: len = strlcat(jstr, "[ ", jlen);
671: else
672: len = strlcat(jstr, "[", jlen);
673:
674: if (len >= jlen) {
675: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
676: jstr[eos] = 0;
677: return -1;
678: }
679:
680: return len;
681: }
682:
683: /*
684: * json_add_end_array() - Adds end of array ]
685: *
686: * @jstr = JSON string
687: * @jlen = JSON string length
688: * @wspace = whitespace include
689: * return: -1 error or !=-1 actual JSON string length
690: */
691: int
692: json_add_end_array(char * __restrict jstr, int jlen, int wspace)
693: {
694: int len;
695: size_t eos;
696:
697: if (!jstr)
698: return -1;
699: else
700: eos = strlen(jstr);
701:
702: if (wspace)
703: len = strlcat(jstr, " ]", jlen);
704: else
705: len = strlcat(jstr, "]", jlen);
706:
707: if (len >= jlen) {
708: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
709: jstr[eos] = 0;
710: return -1;
711: }
712:
713: return len;
714: }
715:
716: /*
717: * json_add_char() - Adds character
718: *
719: * @jstr = JSON string
720: * @jlen = JSON string length
721: * @ch = Character
722: * return: -1 error or !=-1 actual JSON string length
723: */
724: int
725: json_add_char(char * __restrict jstr, int jlen, u_char ch)
726: {
727: int len;
728:
729: if (!jstr)
730: return -1;
731:
732: len = strlen(jstr) + 1;
733: if (len >= jlen) {
734: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
735: return -1;
736: } else {
737: jstr[len++] = (char) ch;
738: jstr[len] = 0;
739: }
740:
741: return len;
742: }
743:
744: /*
745: * json_add_colon() - Adds key/value pair delimiter colon :
746: *
747: * @jstr = JSON string
748: * @jlen = JSON string length
749: * @wspace = whitespace include
750: * return: -1 error or !=-1 actual JSON string length
751: */
752: int
753: json_add_colon(char * __restrict jstr, int jlen, int wspace)
754: {
755: int len;
756: size_t eos;
757:
758: if (!jstr)
759: return -1;
760: else
761: eos = strlen(jstr);
762:
763: if (wspace)
764: len = strlcat(jstr, ": ", jlen);
765: else
766: len = strlcat(jstr, ":", jlen);
767:
768: if (len >= jlen) {
769: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
770: jstr[eos] = 0;
771: return -1;
772: }
773:
774: return len;
775: }
776:
777: /*
778: * json_add_comma() - Adds value delimiter comma ,
779: *
780: * @jstr = JSON string
781: * @jlen = JSON string length
782: * @wspace = whitespace include
783: * return: -1 error or !=-1 actual JSON string length
784: */
785: int
786: json_add_comma(char * __restrict jstr, int jlen, int wspace)
787: {
788: int len;
789: size_t eos;
790:
791: if (!jstr)
792: return -1;
793: else
794: eos = strlen(jstr);
795:
796: if (wspace)
797: len = strlcat(jstr, ", ", jlen);
798: else
799: len = strlcat(jstr, ",", jlen);
800:
801: if (len >= jlen) {
802: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
803: jstr[eos] = 0;
804: return -1;
805: }
806:
807: return len;
808: }
809:
810: /*
811: * json_add_string() - Adds string
812: *
813: * @jstr = JSON string
814: * @jlen = JSON string length
815: * @unquot = Unquoted string
816: * @str = String, it can't be NULL
817: * return: -1 error or !=-1 actual JSON string length
818: */
819: int
820: json_add_string(char * __restrict jstr, int jlen, int unquot, const char *str)
821: {
822: int len;
823: size_t eos;
824:
825: if (!jstr || !str)
826: return -1;
827: else
828: eos = strlen(jstr);
829:
830: if (!unquot) {
831: len = strlcat(jstr, "\"", jlen);
832: if (len >= jlen) {
833: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
834: jstr[eos] = 0;
835: return -1;
836: }
837: }
838: len = strlcat(jstr, str, jlen);
839: if (len >= jlen) {
840: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
841: jstr[eos] = 0;
842: return -1;
843: }
844: if (!unquot) {
845: len = strlcat(jstr, "\"", jlen);
846: if (len >= jlen) {
847: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
848: jstr[eos] = 0;
849: return -1;
850: }
851: }
852:
853: return len;
854: }
855:
856: /*
857: * json_add_value() - Adds value
858: *
859: * @jstr = JSON string
860: * @jlen = JSON string length
861: * @unquot = Unquoted number
862: * @num = Number
863: * return: -1 error or !=-1 actual JSON string length
864: */
865: int
866: json_add_value(char * __restrict jstr, int jlen, int unquot, long num)
867: {
868: int len;
869: char wrk[STRSIZ] = { [0 ... STRSIZ - 1] = 0 };
870: size_t eos;
871:
872: if (!jstr)
873: return -1;
874: else
875: eos = strlen(jstr);
876:
877: if (!unquot) {
878: len = strlcat(jstr, "\"", jlen);
879: if (len >= jlen) {
880: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
881: jstr[eos] = 0;
882: return -1;
883: }
884: }
885: snprintf(wrk, sizeof wrk, "%ld", num);
886: len = strlcat(jstr, wrk, jlen);
887: if (len >= jlen) {
888: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
889: jstr[eos] = 0;
890: return -1;
891: }
892: if (!unquot) {
893: len = strlcat(jstr, "\"", jlen);
894: if (len >= jlen) {
895: elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
896: jstr[eos] = 0;
897: return -1;
898: }
899: }
900:
901: return len;
902: }
903:
904: /*
905: * json_add_pair() - Adds key/value pair
906: *
907: * @jstr = JSON string
908: * @jlen = JSON string length
909: * @wspace = whitespace include
910: * @key = Key string
911: * @val = Value string
912: * return: -1 error or !=-1 actual JSON string length
913: */
914: int
915: json_add_pair(char * __restrict jstr, int jlen, int wspace, const char *key, const char *val)
916: {
917: int len = -1;
918: size_t eos;
919:
920: if (!jstr || !key || !val)
921: return -1;
922: else
923: eos = strlen(jstr);
924:
925: if (json_add_string(jstr, jlen, 0, key) == -1) {
926: jstr[eos] = 0;
927: return -1;
928: }
929: if (json_add_colon(jstr, jlen, wspace) == -1) {
930: jstr[eos] = 0;
931: return -1;
932: }
933: if ((len = json_add_string(jstr, jlen, 0, val)) == -1) {
934: jstr[eos] = 0;
935: return -1;
936: }
937:
938: return len;
939: }
940:
941: /*
942: * json_add_array() - Adds array
943: *
944: * @jstr = JSON string
945: * @jlen = JSON string length
946: * @wspace = whitespace include
947: * @arr = Array with variables
948: * return: -1 error or !=-1 actual JSON string length
949: */
950: int
951: json_add_array(char * __restrict jstr, int jlen, int wspace, array_t * __restrict arr)
952: {
953: int len = -1;
954: register int i;
955: ait_val_t *v;
956: size_t eos;
957:
958: if (!jstr || !arr)
959: return -1;
960: else
961: eos = strlen(jstr);
962:
963: if (json_add_begin_array(jstr, jlen, wspace) == -1) {
964: jstr[eos] = 0;
965: return -1;
966: }
967: for (i = 0; i < array_Size(arr); i++) {
968: v = array(arr, i, ait_val_t*);
969: if (v) {
970: if (AIT_TYPE(v) == string) {
971: if (json_add_string(jstr, jlen, 0, AIT_GET_STR(v)) == -1) {
972: jstr[eos] = 0;
973: return -1;
974: }
975: } else {
976: if (json_add_value(jstr, jlen, 0, AIT_GET_LIKE(v, long)) == -1) {
977: jstr[eos] = 0;
978: return -1;
979: }
980: }
981: if (i < array_Size(arr) - 1 && json_add_comma(jstr, jlen, wspace) == -1) {
982: jstr[eos] = 0;
983: return -1;
984: }
985: }
986: }
987: if ((len = json_add_end_array(jstr, jlen, wspace)) == -1) {
988: jstr[eos] = 0;
989: return -1;
990: }
991:
992: return len;
993: }
994:
995: /*
996: * json_dump_yaml() - Dump parsed JSON string to YAML format
997: *
998: * @f = Output handler
999: * @jstr = JSON string
1000: * @toks = JSON tokens
1001: * @toksnum = Number of tokens
1002: * @indent = Start indent spaces
1003: * return: 0 done and 1 added one more item
1004: */
1005: int
1006: json_dump_yaml(FILE *f, const char *jstr, jtok_t *toks, int toksnum, int indent)
1007: {
1008: register int i, j, k;
1009:
1010: if (!toksnum)
1011: return 0;
1012:
1013: if (toks->tok_type == J_VALUE) {
1014: fprintf(f, "%.*s", (int) json_toklen(toks), json_tokstr(jstr, toks));
1015: return 1;
1016: } else if (toks->tok_type == J_STRING) {
1017: fprintf(f, "%.*s", (int) json_toklen(toks), json_tokstr(jstr, toks));
1018: return 1;
1019: } else if (toks->tok_type == J_OBJECT) {
1020: fprintf(f, "\n");
1021: for (j = i = 0; i < json_toksize(toks); i++) {
1022: for (k = 0; k < indent; k++)
1023: fprintf(f, " ");
1024: j += json_dump_yaml(f, jstr, toks + j + 1, toksnum - j, indent + 1);
1025: fprintf(f, ": ");
1026: j += json_dump_yaml(f, jstr, toks + j + 1, toksnum - j, indent + 1);
1027: fprintf(f, "\n");
1028: }
1029: return j + 1;
1030: } else if (toks->tok_type == J_ARRAY) {
1031: fprintf(f, "\n");
1032: for (j = i = 0; i < json_toksize(toks); i++) {
1033: for (k = 0; k < indent - 1; k++)
1034: fprintf(f, " ");
1035: fprintf(f, " - ");
1036: j += json_dump_yaml(f, jstr, toks + j + 1, toksnum - j, indent + 1);
1037: fprintf(f, "\n");
1038: }
1039: return j + 1;
1040: }
1041:
1042: return 0;
1043: }
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