1: /*
2: Copyright (c) 2009 Dave Gamble
3:
4: Permission is hereby granted, free of charge, to any person obtaining a copy
5: of this software and associated documentation files (the "Software"), to deal
6: in the Software without restriction, including without limitation the rights
7: to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8: copies of the Software, and to permit persons to whom the Software is
9: furnished to do so, subject to the following conditions:
10:
11: The above copyright notice and this permission notice shall be included in
12: all copies or substantial portions of the Software.
13:
14: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15: IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16: FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17: AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18: LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19: OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20: THE SOFTWARE.
21: */
22:
23: /* cJSON */
24: /* JSON parser in C. */
25:
26: #include <string.h>
27: #include <stdio.h>
28: #include <math.h>
29: #include <stdlib.h>
30: #include <float.h>
31: #include <limits.h>
32: #include <ctype.h>
33: #ifdef HAVE_STDINT_H
34: #include <stdint.h>
35: #endif
36: #include <sys/types.h>
37: #include "cjson.h"
38:
39: #ifndef LLONG_MAX
40: #define LLONG_MAX 9223372036854775807LL
41: #endif
42: #ifndef LLONG_MIN
43: #define LLONG_MIN (-LLONG_MAX - 1LL)
44: #endif
45: static const char *global_ep;
46:
47: const char *cJSON_GetErrorPtr(void) {return global_ep;}
48:
49: static int cJSON_strcasecmp(const char *s1,const char *s2)
50: {
51: if (!s1) return (s1==s2)?0:1;if (!s2) return 1;
52: for(; tolower(*s1) == tolower(*s2); ++s1, ++s2) if(*s1 == 0) return 0;
53: return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
54: }
55:
56: static void *(*cJSON_malloc)(size_t sz) = malloc;
57: static void (*cJSON_free)(void *ptr) = free;
58:
59: static char* cJSON_strdup(const char* str)
60: {
61: size_t len;
62: char* copy;
63:
64: len = strlen(str) + 1;
65: if (!(copy = (char*)cJSON_malloc(len))) return 0;
66: memcpy(copy,str,len);
67: return copy;
68: }
69:
70: void cJSON_InitHooks(cJSON_Hooks* hooks)
71: {
72: if (!hooks) { /* Reset hooks */
73: cJSON_malloc = malloc;
74: cJSON_free = free;
75: return;
76: }
77:
78: cJSON_malloc = (hooks->malloc_fn)?hooks->malloc_fn:malloc;
79: cJSON_free = (hooks->free_fn)?hooks->free_fn:free;
80: }
81:
82: /* Internal constructor. */
83: static cJSON *cJSON_New_Item(void)
84: {
85: cJSON* node = (cJSON*)cJSON_malloc(sizeof(cJSON));
86: if (node) memset(node,0,sizeof(cJSON));
87: return node;
88: }
89:
90: /* Delete a cJSON structure. */
91: void cJSON_Delete(cJSON *c)
92: {
93: cJSON *next;
94: while (c)
95: {
96: next=c->next;
97: if (!(c->type&cJSON_IsReference) && c->child) cJSON_Delete(c->child);
98: if (!(c->type&cJSON_IsReference) && c->valuestring) cJSON_free(c->valuestring);
99: if (!(c->type&cJSON_StringIsConst) && c->string) cJSON_free(c->string);
100: cJSON_free(c);
101: c=next;
102: }
103: }
104:
105: /* Parse the input text to generate a number, and populate the result into item. */
106: static const char *parse_number(cJSON *item,const char *num)
107: {
108: double n=0,sign=1,scale=0;int subscale=0,signsubscale=1;
109:
110: if (*num=='-') sign=-1,num++; /* Has sign? */
111: if (*num=='0') num++; /* is zero */
112: if (*num>='1' && *num<='9') do n=(n*10.0)+(*num++ -'0'); while (*num>='0' && *num<='9'); /* Number? */
113: if (*num=='.' && num[1]>='0' && num[1]<='9') {num++; do n=(n*10.0)+(*num++ -'0'),scale--; while (*num>='0' && *num<='9');} /* Fractional part? */
114: if (*num=='e' || *num=='E') /* Exponent? */
115: { num++;if (*num=='+') num++; else if (*num=='-') signsubscale=-1,num++; /* With sign? */
116: while (*num>='0' && *num<='9') subscale=(subscale*10)+(*num++ - '0'); /* Number? */
117: }
118:
119: n=sign*n*pow(10.0,(scale+subscale*signsubscale)); /* number = +/- number.fraction * 10^+/- exponent */
120:
121: item->valuedouble=n;
122: item->valueint=(int64_t)n;
123: item->type=cJSON_Number;
124: return num;
125: }
126:
127: static int pow2gt (int x) { --x; x|=x>>1; x|=x>>2; x|=x>>4; x|=x>>8; x|=x>>16; return x+1; }
128:
129: typedef struct {char *buffer; int length; int offset; } printbuffer;
130:
131: static char* ensure(printbuffer *p,int needed)
132: {
133: char *newbuffer;int newsize;
134: if (!p || !p->buffer) return 0;
135: needed+=p->offset;
136: if (needed<=p->length) return p->buffer+p->offset;
137:
138: newsize=pow2gt(needed);
139: newbuffer=(char*)cJSON_malloc(newsize);
140: if (!newbuffer) {cJSON_free(p->buffer);p->length=0,p->buffer=0;return 0;}
141: if (newbuffer) memcpy(newbuffer,p->buffer,p->length);
142: cJSON_free(p->buffer);
143: p->length=newsize;
144: p->buffer=newbuffer;
145: return newbuffer+p->offset;
146: }
147:
148: static int update(printbuffer *p)
149: {
150: char *str;
151: if (!p || !p->buffer) return 0;
152: str=p->buffer+p->offset;
153: return p->offset+strlen(str);
154: }
155:
156: /* Render the number nicely from the given item into a string. */
157: static char *print_number(cJSON *item,printbuffer *p)
158: {
159: char *str=0;
160: double d=item->valuedouble;
161: if (d==0)
162: {
163: if (p) str=ensure(p,2);
164: else str=(char*)cJSON_malloc(2); /* special case for 0. */
165: if (str) strcpy(str,"0");
166: }
167: else if (fabs(((double)item->valueint)-d)<=DBL_EPSILON && d<=LLONG_MAX && d>=LLONG_MIN)
168: {
169: if (p) str=ensure(p,64);
170: else str=(char*)cJSON_malloc(64);
171: if (str) sprintf(str,"%lld",(long long) item->valueint);
172: }
173: else
174: {
175: if (p) str=ensure(p,64);
176: else str=(char*)cJSON_malloc(64); /* This is a nice tradeoff. */
177: if (str)
178: {
179: if (fpclassify(d) != FP_ZERO && !isnormal(d)) sprintf(str,"null");
180: else if (fabs(floor(d)-d)<=DBL_EPSILON && fabs(d)<1.0e60) sprintf(str,"%.0f",d);
181: else if (fabs(d)<1.0e-6 || fabs(d)>1.0e9) sprintf(str,"%e",d);
182: else sprintf(str,"%f",d);
183: }
184: }
185: return str;
186: }
187:
188: static unsigned parse_hex4(const char *str)
189: {
190: unsigned h=0;
191: if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
192: h=h<<4;str++;
193: if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
194: h=h<<4;str++;
195: if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
196: h=h<<4;str++;
197: if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
198: return h;
199: }
200:
201: /* Parse the input text into an unescaped cstring, and populate item. */
202: static const unsigned char firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
203: static const char *parse_string(cJSON *item,const char *str,const char **ep)
204: {
205: const char *ptr=str+1,*end_ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc,uc2;
206: if (*str!='\"') {*ep=str;return 0;} /* not a string! */
207:
208: while (*end_ptr!='\"' && *end_ptr && ++len) if (*end_ptr++ == '\\') end_ptr++; /* Skip escaped quotes. */
209:
210: out=(char*)cJSON_malloc(len+1); /* This is how long we need for the string, roughly. */
211: if (!out) return 0;
212: item->valuestring=out; /* assign here so out will be deleted during cJSON_Delete() later */
213: item->type=cJSON_String;
214:
215: ptr=str+1;ptr2=out;
216: while (ptr < end_ptr)
217: {
218: if (*ptr!='\\') *ptr2++=*ptr++;
219: else
220: {
221: ptr++;
222: switch (*ptr)
223: {
224: case 'b': *ptr2++='\b'; break;
225: case 'f': *ptr2++='\f'; break;
226: case 'n': *ptr2++='\n'; break;
227: case 'r': *ptr2++='\r'; break;
228: case 't': *ptr2++='\t'; break;
229: case 'u': /* transcode utf16 to utf8. */
230: uc=parse_hex4(ptr+1);ptr+=4; /* get the unicode char. */
231: if (ptr >= end_ptr) {*ep=str;return 0;} /* invalid */
232:
233: if ((uc>=0xDC00 && uc<=0xDFFF) || uc==0) {*ep=str;return 0;} /* check for invalid. */
234:
235: if (uc>=0xD800 && uc<=0xDBFF) /* UTF16 surrogate pairs. */
236: {
237: if (ptr+6 > end_ptr) {*ep=str;return 0;} /* invalid */
238: if (ptr[1]!='\\' || ptr[2]!='u') {*ep=str;return 0;} /* missing second-half of surrogate. */
239: uc2=parse_hex4(ptr+3);ptr+=6;
240: if (uc2<0xDC00 || uc2>0xDFFF) {*ep=str;return 0;} /* invalid second-half of surrogate. */
241: uc=0x10000 + (((uc&0x3FF)<<10) | (uc2&0x3FF));
242: }
243:
244: len=4;if (uc<0x80) len=1;else if (uc<0x800) len=2;else if (uc<0x10000) len=3; ptr2+=len;
245:
246: switch (len) {
247: case 4: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
248: case 3: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
249: case 2: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
250: case 1: *--ptr2 =(uc | firstByteMark[len]);
251: }
252: ptr2+=len;
253: break;
254: default: *ptr2++=*ptr; break;
255: }
256: ptr++;
257: }
258: }
259: *ptr2=0;
260: if (*ptr=='\"') ptr++;
261: return ptr;
262: }
263:
264: /* Render the cstring provided to an escaped version that can be printed. */
265: static char *print_string_ptr(const char *str,printbuffer *p)
266: {
267: const char *ptr;char *ptr2,*out;int len=0,flag=0;unsigned char token;
268:
269: if (!str)
270: {
271: if (p) out=ensure(p,3);
272: else out=(char*)cJSON_malloc(3);
273: if (!out) return 0;
274: strcpy(out,"\"\"");
275: return out;
276: }
277:
278: for (ptr=str;*ptr;ptr++) flag|=((*ptr>0 && *ptr<32)||(*ptr=='\"')||(*ptr=='\\'))?1:0;
279: if (!flag)
280: {
281: len=ptr-str;
282: if (p) out=ensure(p,len+3);
283: else out=(char*)cJSON_malloc(len+3);
284: if (!out) return 0;
285: ptr2=out;*ptr2++='\"';
286: strcpy(ptr2,str);
287: ptr2[len]='\"';
288: ptr2[len+1]=0;
289: return out;
290: }
291:
292: ptr=str;while ((token=*ptr) && ++len) {if (strchr("\"\\\b\f\n\r\t",token)) len++; else if (token<32) len+=5;ptr++;}
293:
294: if (p) out=ensure(p,len+3);
295: else out=(char*)cJSON_malloc(len+3);
296: if (!out) return 0;
297:
298: ptr2=out;ptr=str;
299: *ptr2++='\"';
300: while (*ptr)
301: {
302: if ((unsigned char)*ptr>31 && *ptr!='\"' && *ptr!='\\') *ptr2++=*ptr++;
303: else
304: {
305: *ptr2++='\\';
306: switch (token=*ptr++)
307: {
308: case '\\': *ptr2++='\\'; break;
309: case '\"': *ptr2++='\"'; break;
310: case '\b': *ptr2++='b'; break;
311: case '\f': *ptr2++='f'; break;
312: case '\n': *ptr2++='n'; break;
313: case '\r': *ptr2++='r'; break;
314: case '\t': *ptr2++='t'; break;
315: default: sprintf(ptr2,"u%04x",token);ptr2+=5; break; /* escape and print */
316: }
317: }
318: }
319: *ptr2++='\"';*ptr2++=0;
320: return out;
321: }
322: /* Invote print_string_ptr (which is useful) on an item. */
323: static char *print_string(cJSON *item,printbuffer *p) {return print_string_ptr(item->valuestring,p);}
324:
325: /* Predeclare these prototypes. */
326: static const char *parse_value(cJSON *item,const char *value,const char **ep);
327: static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p);
328: static const char *parse_array(cJSON *item,const char *value,const char **ep);
329: static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p);
330: static const char *parse_object(cJSON *item,const char *value,const char **ep);
331: static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p);
332:
333: /* Utility to jump whitespace and cr/lf */
334: static const char *skip(const char *in) {while (in && *in && (unsigned char)*in<=32) in++; return in;}
335:
336: /* Parse an object - create a new root, and populate. */
337: cJSON *cJSON_ParseWithOpts(const char *value,const char **return_parse_end,int require_null_terminated)
338: {
339: const char *end=0,**ep=return_parse_end?return_parse_end:&global_ep;
340: cJSON *c=cJSON_New_Item();
341: *ep=0;
342: if (!c) return 0; /* memory fail */
343:
344: end=parse_value(c,skip(value),ep);
345: if (!end) {cJSON_Delete(c);return 0;} /* parse failure. ep is set. */
346:
347: /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
348: if (require_null_terminated) {end=skip(end);if (*end) {cJSON_Delete(c);*ep=end;return 0;}}
349: if (return_parse_end) *return_parse_end=end;
350: return c;
351: }
352: /* Default options for cJSON_Parse */
353: cJSON *cJSON_Parse(const char *value) {return cJSON_ParseWithOpts(value,0,0);}
354:
355: /* Render a cJSON item/entity/structure to text. */
356: char *cJSON_Print(cJSON *item) {return print_value(item,0,1,0);}
357: char *cJSON_PrintUnformatted(cJSON *item) {return print_value(item,0,0,0);}
358:
359: char *cJSON_PrintBuffered(cJSON *item,int prebuffer,int fmt)
360: {
361: printbuffer p;
362: p.buffer=(char*)cJSON_malloc(prebuffer);
363: p.length=prebuffer;
364: p.offset=0;
365: return print_value(item,0,fmt,&p);
366: }
367:
368:
369: /* Parser core - when encountering text, process appropriately. */
370: static const char *parse_value(cJSON *item,const char *value,const char **ep)
371: {
372: if (!value) return 0; /* Fail on null. */
373: if (!strncmp(value,"null",4)) { item->type=cJSON_NULL; return value+4; }
374: if (!strncmp(value,"false",5)) { item->type=cJSON_False; return value+5; }
375: if (!strncmp(value,"true",4)) { item->type=cJSON_True; item->valueint=1; return value+4; }
376: if (*value=='\"') { return parse_string(item,value,ep); }
377: if (*value=='-' || (*value>='0' && *value<='9')) { return parse_number(item,value); }
378: if (*value=='[') { return parse_array(item,value,ep); }
379: if (*value=='{') { return parse_object(item,value,ep); }
380:
381: *ep=value;return 0; /* failure. */
382: }
383:
384: /* Render a value to text. */
385: static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p)
386: {
387: char *out=0;
388: if (!item) return 0;
389: if (p)
390: {
391: switch ((item->type)&255)
392: {
393: case cJSON_NULL: {out=ensure(p,5); if (out) strcpy(out,"null"); break;}
394: case cJSON_False: {out=ensure(p,6); if (out) strcpy(out,"false"); break;}
395: case cJSON_True: {out=ensure(p,5); if (out) strcpy(out,"true"); break;}
396: case cJSON_Number: out=print_number(item,p);break;
397: case cJSON_String: out=print_string(item,p);break;
398: case cJSON_Array: out=print_array(item,depth,fmt,p);break;
399: case cJSON_Object: out=print_object(item,depth,fmt,p);break;
400: }
401: }
402: else
403: {
404: switch ((item->type)&255)
405: {
406: case cJSON_NULL: out=cJSON_strdup("null"); break;
407: case cJSON_False: out=cJSON_strdup("false");break;
408: case cJSON_True: out=cJSON_strdup("true"); break;
409: case cJSON_Number: out=print_number(item,0);break;
410: case cJSON_String: out=print_string(item,0);break;
411: case cJSON_Array: out=print_array(item,depth,fmt,0);break;
412: case cJSON_Object: out=print_object(item,depth,fmt,0);break;
413: }
414: }
415: return out;
416: }
417:
418: /* Build an array from input text. */
419: static const char *parse_array(cJSON *item,const char *value,const char **ep)
420: {
421: cJSON *child;
422: if (*value!='[') {*ep=value;return 0;} /* not an array! */
423:
424: item->type=cJSON_Array;
425: value=skip(value+1);
426: if (*value==']') return value+1; /* empty array. */
427:
428: item->child=child=cJSON_New_Item();
429: if (!item->child) return 0; /* memory fail */
430: value=skip(parse_value(child,skip(value),ep)); /* skip any spacing, get the value. */
431: if (!value) return 0;
432:
433: while (*value==',')
434: {
435: cJSON *new_item;
436: if (!(new_item=cJSON_New_Item())) return 0; /* memory fail */
437: child->next=new_item;new_item->prev=child;child=new_item;
438: value=skip(parse_value(child,skip(value+1),ep));
439: if (!value) return 0; /* memory fail */
440: }
441:
442: if (*value==']') return value+1; /* end of array */
443: *ep=value;return 0; /* malformed. */
444: }
445:
446: /* Render an array to text */
447: static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p)
448: {
449: char **entries;
450: char *out=0,*ptr,*ret;int len=5;
451: cJSON *child=item->child;
452: int numentries=0,i=0,fail=0;
453: size_t tmplen=0;
454:
455: /* How many entries in the array? */
456: while (child) numentries++,child=child->next;
457: /* Explicitly handle numentries==0 */
458: if (!numentries)
459: {
460: if (p) out=ensure(p,3);
461: else out=(char*)cJSON_malloc(3);
462: if (out) strcpy(out,"[]");
463: return out;
464: }
465:
466: if (p)
467: {
468: /* Compose the output array. */
469: i=p->offset;
470: ptr=ensure(p,1);if (!ptr) return 0; *ptr='['; p->offset++;
471: child=item->child;
472: while (child && !fail)
473: {
474: print_value(child,depth+1,fmt,p);
475: p->offset=update(p);
476: if (child->next) {len=fmt?2:1;ptr=ensure(p,len+1);if (!ptr) return 0;*ptr++=',';if(fmt)*ptr++=' ';*ptr=0;p->offset+=len;}
477: child=child->next;
478: }
479: ptr=ensure(p,2);if (!ptr) return 0; *ptr++=']';*ptr=0;
480: out=(p->buffer)+i;
481: }
482: else
483: {
484: /* Allocate an array to hold the values for each */
485: entries=(char**)cJSON_malloc(numentries*sizeof(char*));
486: if (!entries) return 0;
487: memset(entries,0,numentries*sizeof(char*));
488: /* Retrieve all the results: */
489: child=item->child;
490: while (child && !fail)
491: {
492: ret=print_value(child,depth+1,fmt,0);
493: entries[i++]=ret;
494: if (ret) len+=strlen(ret)+2+(fmt?1:0); else fail=1;
495: child=child->next;
496: }
497:
498: /* If we didn't fail, try to malloc the output string */
499: if (!fail) out=(char*)cJSON_malloc(len);
500: /* If that fails, we fail. */
501: if (!out) fail=1;
502:
503: /* Handle failure. */
504: if (fail)
505: {
506: for (i=0;i<numentries;i++) if (entries[i]) cJSON_free(entries[i]);
507: cJSON_free(entries);
508: return 0;
509: }
510:
511: /* Compose the output array. */
512: *out='[';
513: ptr=out+1;*ptr=0;
514: for (i=0;i<numentries;i++)
515: {
516: tmplen=strlen(entries[i]);memcpy(ptr,entries[i],tmplen);ptr+=tmplen;
517: if (i!=numentries-1) {*ptr++=',';if(fmt)*ptr++=' ';*ptr=0;}
518: cJSON_free(entries[i]);
519: }
520: cJSON_free(entries);
521: *ptr++=']';*ptr++=0;
522: }
523: return out;
524: }
525:
526: /* Build an object from the text. */
527: static const char *parse_object(cJSON *item,const char *value,const char **ep)
528: {
529: cJSON *child;
530: if (*value!='{') {*ep=value;return 0;} /* not an object! */
531:
532: item->type=cJSON_Object;
533: value=skip(value+1);
534: if (*value=='}') return value+1; /* empty array. */
535:
536: item->child=child=cJSON_New_Item();
537: if (!item->child) return 0;
538: value=skip(parse_string(child,skip(value),ep));
539: if (!value) return 0;
540: child->string=child->valuestring;child->valuestring=0;
541: if (*value!=':') {*ep=value;return 0;} /* fail! */
542: value=skip(parse_value(child,skip(value+1),ep)); /* skip any spacing, get the value. */
543: if (!value) return 0;
544:
545: while (*value==',')
546: {
547: cJSON *new_item;
548: if (!(new_item=cJSON_New_Item())) return 0; /* memory fail */
549: child->next=new_item;new_item->prev=child;child=new_item;
550: value=skip(parse_string(child,skip(value+1),ep));
551: if (!value) return 0;
552: child->string=child->valuestring;child->valuestring=0;
553: if (*value!=':') {*ep=value;return 0;} /* fail! */
554: value=skip(parse_value(child,skip(value+1),ep)); /* skip any spacing, get the value. */
555: if (!value) return 0;
556: }
557:
558: if (*value=='}') return value+1; /* end of array */
559: *ep=value;return 0; /* malformed. */
560: }
561:
562: /* Render an object to text. */
563: static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p)
564: {
565: char **entries=0,**names=0;
566: char *out=0,*ptr,*ret,*str;int len=7,i=0,j;
567: cJSON *child=item->child;
568: int numentries=0,fail=0;
569: size_t tmplen=0;
570: /* Count the number of entries. */
571: while (child) numentries++,child=child->next;
572: /* Explicitly handle empty object case */
573: if (!numentries)
574: {
575: if (p) out=ensure(p,fmt?depth+4:3);
576: else out=(char*)cJSON_malloc(fmt?depth+4:3);
577: if (!out) return 0;
578: ptr=out;*ptr++='{';
579: if (fmt) {*ptr++='\n';for (i=0;i<depth;i++) *ptr++='\t';}
580: *ptr++='}';*ptr++=0;
581: return out;
582: }
583: if (p)
584: {
585: /* Compose the output: */
586: i=p->offset;
587: len=fmt?2:1; ptr=ensure(p,len+1); if (!ptr) return 0;
588: *ptr++='{'; if (fmt) *ptr++='\n'; *ptr=0; p->offset+=len;
589: child=item->child;depth++;
590: while (child)
591: {
592: if (fmt)
593: {
594: ptr=ensure(p,depth); if (!ptr) return 0;
595: for (j=0;j<depth;j++) *ptr++='\t';
596: p->offset+=depth;
597: }
598: print_string_ptr(child->string,p);
599: p->offset=update(p);
600:
601: len=fmt?2:1;
602: ptr=ensure(p,len); if (!ptr) return 0;
603: *ptr++=':';if (fmt) *ptr++='\t';
604: p->offset+=len;
605:
606: print_value(child,depth,fmt,p);
607: p->offset=update(p);
608:
609: len=(fmt?1:0)+(child->next?1:0);
610: ptr=ensure(p,len+1); if (!ptr) return 0;
611: if (child->next) *ptr++=',';
612: if (fmt) *ptr++='\n';*ptr=0;
613: p->offset+=len;
614: child=child->next;
615: }
616: ptr=ensure(p,fmt?(depth+1):2); if (!ptr) return 0;
617: if (fmt) for (i=0;i<depth-1;i++) *ptr++='\t';
618: *ptr++='}';*ptr=0;
619: out=(p->buffer)+i;
620: }
621: else
622: {
623: /* Allocate space for the names and the objects */
624: entries=(char**)cJSON_malloc(numentries*sizeof(char*));
625: if (!entries) return 0;
626: names=(char**)cJSON_malloc(numentries*sizeof(char*));
627: if (!names) {cJSON_free(entries);return 0;}
628: memset(entries,0,sizeof(char*)*numentries);
629: memset(names,0,sizeof(char*)*numentries);
630:
631: /* Collect all the results into our arrays: */
632: child=item->child;depth++;if (fmt) len+=depth;
633: while (child && !fail)
634: {
635: names[i]=str=print_string_ptr(child->string,0);
636: entries[i++]=ret=print_value(child,depth,fmt,0);
637: if (str && ret) len+=strlen(ret)+strlen(str)+2+(fmt?2+depth:0); else fail=1;
638: child=child->next;
639: }
640:
641: /* Try to allocate the output string */
642: if (!fail) out=(char*)cJSON_malloc(len);
643: if (!out) fail=1;
644:
645: /* Handle failure */
646: if (fail)
647: {
648: for (i=0;i<numentries;i++) {if (names[i]) cJSON_free(names[i]);if (entries[i]) cJSON_free(entries[i]);}
649: cJSON_free(names);cJSON_free(entries);
650: return 0;
651: }
652:
653: /* Compose the output: */
654: *out='{';ptr=out+1;if (fmt)*ptr++='\n';*ptr=0;
655: for (i=0;i<numentries;i++)
656: {
657: if (fmt) for (j=0;j<depth;j++) *ptr++='\t';
658: tmplen=strlen(names[i]);memcpy(ptr,names[i],tmplen);ptr+=tmplen;
659: *ptr++=':';if (fmt) *ptr++='\t';
660: strcpy(ptr,entries[i]);ptr+=strlen(entries[i]);
661: if (i!=numentries-1) *ptr++=',';
662: if (fmt) *ptr++='\n';*ptr=0;
663: cJSON_free(names[i]);cJSON_free(entries[i]);
664: }
665:
666: cJSON_free(names);cJSON_free(entries);
667: if (fmt) for (i=0;i<depth-1;i++) *ptr++='\t';
668: *ptr++='}';*ptr++=0;
669: }
670: return out;
671: }
672:
673: /* Get Array size/item / object item. */
674: int cJSON_GetArraySize(cJSON *array) {cJSON *c=array->child;int i=0;while(c)i++,c=c->next;return i;}
675: cJSON *cJSON_GetArrayItem(cJSON *array,int item) {cJSON *c=array?array->child:0;while (c && item>0) item--,c=c->next; return c;}
676: cJSON *cJSON_GetObjectItem(cJSON *object,const char *string) {cJSON *c=object?object->child:0;while (c && cJSON_strcasecmp(c->string,string)) c=c->next; return c;}
677: int cJSON_HasObjectItem(cJSON *object,const char *string) {return cJSON_GetObjectItem(object,string)?1:0;}
678:
679: /* Utility for array list handling. */
680: static void suffix_object(cJSON *prev,cJSON *item) {prev->next=item;item->prev=prev;}
681: /* Utility for handling references. */
682: static cJSON *create_reference(cJSON *item) {cJSON *ref=cJSON_New_Item();if (!ref) return 0;memcpy(ref,item,sizeof(cJSON));ref->string=0;ref->type|=cJSON_IsReference;ref->next=ref->prev=0;return ref;}
683:
684: /* Add item to array/object. */
685: void cJSON_AddItemToArray(cJSON *array, cJSON *item) {cJSON *c=array->child;if (!item) return; if (!c) {array->child=item;} else {while (c && c->next) c=c->next; suffix_object(c,item);}}
686: void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item) {if (!item) return; if (item->string) cJSON_free(item->string);item->string=cJSON_strdup(string);cJSON_AddItemToArray(object,item);}
687: void cJSON_AddItemToObjectCS(cJSON *object,const char *string,cJSON *item) {if (!item) return; if (!(item->type&cJSON_StringIsConst) && item->string) cJSON_free(item->string);item->string=(char*)string;item->type|=cJSON_StringIsConst;cJSON_AddItemToArray(object,item);}
688: void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) {cJSON_AddItemToArray(array,create_reference(item));}
689: void cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item) {cJSON_AddItemToObject(object,string,create_reference(item));}
690:
691: cJSON *cJSON_DetachItemFromArray(cJSON *array,int which) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return 0;
692: if (c->prev) c->prev->next=c->next;if (c->next) c->next->prev=c->prev;if (c==array->child) array->child=c->next;c->prev=c->next=0;return c;}
693: void cJSON_DeleteItemFromArray(cJSON *array,int which) {cJSON_Delete(cJSON_DetachItemFromArray(array,which));}
694: cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string) {int i=0;cJSON *c=object->child;while (c && cJSON_strcasecmp(c->string,string)) i++,c=c->next;if (c) return cJSON_DetachItemFromArray(object,i);return 0;}
695: void cJSON_DeleteItemFromObject(cJSON *object,const char *string) {cJSON_Delete(cJSON_DetachItemFromObject(object,string));}
696:
697: /* Replace array/object items with new ones. */
698: void cJSON_InsertItemInArray(cJSON *array,int which,cJSON *newitem) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) {cJSON_AddItemToArray(array,newitem);return;}
699: newitem->next=c;newitem->prev=c->prev;c->prev=newitem;if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;}
700: void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return;
701: newitem->next=c->next;newitem->prev=c->prev;if (newitem->next) newitem->next->prev=newitem;
702: if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;c->next=c->prev=0;cJSON_Delete(c);}
703: void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem){int i=0;cJSON *c=object->child;while(c && cJSON_strcasecmp(c->string,string))i++,c=c->next;if(c){newitem->string=cJSON_strdup(string);cJSON_ReplaceItemInArray(object,i,newitem);}}
704:
705: /* Create basic types: */
706: cJSON *cJSON_CreateNull(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_NULL;return item;}
707: cJSON *cJSON_CreateTrue(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_True;return item;}
708: cJSON *cJSON_CreateFalse(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_False;return item;}
709: cJSON *cJSON_CreateBool(int b) {cJSON *item=cJSON_New_Item();if(item)item->type=b?cJSON_True:cJSON_False;return item;}
710: cJSON *cJSON_CreateNumber(double num) {cJSON *item=cJSON_New_Item();if(item){item->type=cJSON_Number;item->valuedouble=num;item->valueint=(int64_t)num;}return item;}
711: cJSON *cJSON_CreateString(const char *string) {cJSON *item=cJSON_New_Item();if(item){item->type=cJSON_String;item->valuestring=cJSON_strdup(string);if(!item->valuestring){cJSON_Delete(item);return 0;}}return item;}
712: cJSON *cJSON_CreateArray(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Array;return item;}
713: cJSON *cJSON_CreateObject(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Object;return item;}
714:
715: /* Create Arrays: */
716: cJSON *cJSON_CreateIntArray(const int *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
717: cJSON *cJSON_CreateFloatArray(const float *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
718: cJSON *cJSON_CreateDoubleArray(const double *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
719: cJSON *cJSON_CreateStringArray(const char **strings,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateString(strings[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
720:
721: /* Duplication */
722: cJSON *cJSON_Duplicate(cJSON *item,int recurse)
723: {
724: cJSON *newitem,*cptr,*nptr=0,*newchild;
725: /* Bail on bad ptr */
726: if (!item) return 0;
727: /* Create new item */
728: newitem=cJSON_New_Item();
729: if (!newitem) return 0;
730: /* Copy over all vars */
731: newitem->type=item->type&(~cJSON_IsReference),newitem->valueint=item->valueint,newitem->valuedouble=item->valuedouble;
732: if (item->valuestring) {newitem->valuestring=cJSON_strdup(item->valuestring); if (!newitem->valuestring) {cJSON_Delete(newitem);return 0;}}
733: if (item->string) {newitem->string=cJSON_strdup(item->string); if (!newitem->string) {cJSON_Delete(newitem);return 0;}}
734: /* If non-recursive, then we're done! */
735: if (!recurse) return newitem;
736: /* Walk the ->next chain for the child. */
737: cptr=item->child;
738: while (cptr)
739: {
740: newchild=cJSON_Duplicate(cptr,1); /* Duplicate (with recurse) each item in the ->next chain */
741: if (!newchild) {cJSON_Delete(newitem);return 0;}
742: if (nptr) {nptr->next=newchild,newchild->prev=nptr;nptr=newchild;} /* If newitem->child already set, then crosswire ->prev and ->next and move on */
743: else {newitem->child=newchild;nptr=newchild;} /* Set newitem->child and move to it */
744: cptr=cptr->next;
745: }
746: return newitem;
747: }
748:
749: void cJSON_Minify(char *json)
750: {
751: char *into=json;
752: while (*json)
753: {
754: if (*json==' ') json++;
755: else if (*json=='\t') json++; /* Whitespace characters. */
756: else if (*json=='\r') json++;
757: else if (*json=='\n') json++;
758: else if (*json=='/' && json[1]=='/') while (*json && *json!='\n') json++; /* double-slash comments, to end of line. */
759: else if (*json=='/' && json[1]=='*') {while (*json && !(*json=='*' && json[1]=='/')) json++;json+=2;} /* multiline comments. */
760: else if (*json=='\"'){*into++=*json++;while (*json && *json!='\"'){if (*json=='\\') *into++=*json++;*into++=*json++;}*into++=*json++;} /* string literals, which are \" sensitive. */
761: else *into++=*json++; /* All other characters. */
762: }
763: *into=0; /* and null-terminate. */
764: }
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