Skip to content
Navigation Menu
{{ message }}
forked from DaveGamble/cJSON
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcJSON_Utils.c
More file actions
346 lines (299 loc) · 10.8 KB
/
Copy pathcJSON_Utils.c
File metadata and controls
346 lines (299 loc) · 10.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "cJSON_Utils.h"
static int cJSONUtils_strcasecmp(const char *s1,const char *s2)
{
if (!s1) return (s1==s2)?0:1;if (!s2) return 1;
for(; tolower(*s1) == tolower(*s2); ++s1, ++s2) if(*s1 == 0) return 0;
return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
}
/* JSON Pointer implementation: */
static int cJSONUtils_Pstrcasecmp(const char *a,const char *e)
{
if (!a || !e) return (a==e)?0:1;
for (;*a && *e && *e!='/';a++,e++) {
if (*e=='~') {if (!(e[1]=='0' && *a=='~') && !(e[1]=='1' && *a=='/')) return 1; else e++;}
else if (tolower(*a)!=tolower(*e)) return 1;
}
if ((*e!=0 && *e!='/') != (*a!=0)) return 1;
return 0;
}
static int cJSONUtils_PointerEncodedstrlen(const char *s) {int l=0;for (;*s;s++,l++) if (*s=='~' || *s=='/') l++;return l;}
static void cJSONUtils_PointerEncodedstrcpy(char *d,const char *s)
{
for (;*s;s++)
{
if (*s=='/') {*d++='~';*d++='1';}
else if (*s=='~') {*d++='~';*d++='0';}
else *d++=*s;
}
*d=0;
}
char *cJSONUtils_FindPointerFromObjectTo(cJSON *object,cJSON *target)
{
int type=object->type,c=0;cJSON *obj=0;
if (object==target) return strdup("");
for (obj=object->child;obj;obj=obj->next,c++)
{
char *found=cJSONUtils_FindPointerFromObjectTo(obj,target);
if (found)
{
if (type==cJSON_Array)
{
char *ret=(char*)malloc(strlen(found)+23);
sprintf(ret,"/%d%s",c,found);
free(found);
return ret;
}
else if (type==cJSON_Object)
{
char *ret=(char*)malloc(strlen(found)+cJSONUtils_PointerEncodedstrlen(obj->string)+2);
*ret='/';cJSONUtils_PointerEncodedstrcpy(ret+1,obj->string);
strcat(ret,found);
free(found);
return ret;
}
free(found);
return 0;
}
}
return 0;
}
cJSON *cJSONUtils_GetPointer(cJSON *object,const char *pointer)
{
while (*pointer++=='/' && object)
{
if (object->type==cJSON_Array)
{
int which=0; while (*pointer>='0' && *pointer<='9') which=(10*which) + *pointer++ - '0';
if (*pointer && *pointer!='/') return 0;
object=cJSON_GetArrayItem(object,which);
}
else if (object->type==cJSON_Object)
{
object=object->child; while (object && cJSONUtils_Pstrcasecmp(object->string,pointer)) object=object->next; /* GetObjectItem. */
while (*pointer && *pointer!='/') pointer++;
}
else return 0;
}
return object;
}
/* JSON Patch implementation. */
static void cJSONUtils_InplaceDecodePointerString(char *string)
{
char *s2=string;
for (;*string;s2++,string++) *s2=(*string!='~')?(*string):((*(++string)=='0')?'~':'/');
*s2=0;
}
static cJSON *cJSONUtils_PatchDetach(cJSON *object,const char *path)
{
char *parentptr=0,*childptr=0;cJSON *parent=0,*ret=0;
parentptr=strdup(path); childptr=strrchr(parentptr,'/'); if (childptr) *childptr++=0;
parent=cJSONUtils_GetPointer(object,parentptr);
cJSONUtils_InplaceDecodePointerString(childptr);
if (!parent) ret=0; /* Couldn't find object to remove child from. */
else if (parent->type==cJSON_Array) ret=cJSON_DetachItemFromArray(parent,atoi(childptr));
else if (parent->type==cJSON_Object) ret=cJSON_DetachItemFromObject(parent,childptr);
free(parentptr);
return ret;
}
static int cJSONUtils_Compare(cJSON *a,cJSON *b)
{
if (a->type!=b->type) return -1; /* mismatched type. */
switch (a->type)
{
case cJSON_Number: return (a->valueint!=b->valueint || a->valuedouble!=b->valuedouble)?-2:0; /* numeric mismatch. */
case cJSON_String: return (strcmp(a->valuestring,b->valuestring)!=0)?-3:0; /* string mismatch. */
case cJSON_Array: for (a=a->child,b=b->child;a && b;a=a->next,b=b->next) {int err=cJSONUtils_Compare(a,b);if (err) return err;}
return (a || b)?-4:0; /* array size mismatch. */
case cJSON_Object:
cJSONUtils_SortObject(a);
cJSONUtils_SortObject(b);
a=a->child,b=b->child;
while (a && b)
{
int err;
if (cJSONUtils_strcasecmp(a->string,b->string)) return -6; /* missing member */
err=cJSONUtils_Compare(a,b);if (err) return err;
a=a->next,b=b->next;
}
return (a || b)?-5:0; /* object length mismatch */
default: break;
}
return 0;
}
static int cJSONUtils_ApplyPatch(cJSON *object,cJSON *patch)
{
cJSON *op=0,*path=0,*value=0,*parent=0;int opcode=0;char *parentptr=0,*childptr=0;
op=cJSON_GetObjectItem(patch,"op");
path=cJSON_GetObjectItem(patch,"path");
if (!op || !path) return 2; /* malformed patch. */
if (!strcmp(op->valuestring,"add")) opcode=0;
else if (!strcmp(op->valuestring,"remove")) opcode=1;
else if (!strcmp(op->valuestring,"replace"))opcode=2;
else if (!strcmp(op->valuestring,"move")) opcode=3;
else if (!strcmp(op->valuestring,"copy")) opcode=4;
else if (!strcmp(op->valuestring,"test")) return cJSONUtils_Compare(cJSONUtils_GetPointer(object,path->valuestring),cJSON_GetObjectItem(patch,"value"));
else return 3; /* unknown opcode. */
if (opcode==1 || opcode==2) /* Remove/Replace */
{
cJSON_Delete(cJSONUtils_PatchDetach(object,path->valuestring)); /* Get rid of old. */
if (opcode==1) return 0; /* For Remove, this is job done. */
}
if (opcode==3 || opcode==4) /* Copy/Move uses "from". */
{
cJSON *from=cJSON_GetObjectItem(patch,"from"); if (!from) return 4; /* missing "from" for copy/move. */
if (opcode==3) value=cJSONUtils_PatchDetach(object,from->valuestring);
if (opcode==4) value=cJSONUtils_GetPointer(object,from->valuestring);
if (!value) return 5; /* missing "from" for copy/move. */
if (opcode==4) value=cJSON_Duplicate(value,1);
if (!value) return 6; /* out of memory for copy/move. */
}
else /* Add/Replace uses "value". */
{
value=cJSON_GetObjectItem(patch,"value");
if (!value) return 7; /* missing "value" for add/replace. */
value=cJSON_Duplicate(value,1);
if (!value) return 8; /* out of memory for add/replace. */
}
/* Now, just add "value" to "path". */
parentptr=strdup(path->valuestring); childptr=strrchr(parentptr,'/'); if (childptr) *childptr++=0;
parent=cJSONUtils_GetPointer(object,parentptr);
cJSONUtils_InplaceDecodePointerString(childptr);
/* add, remove, replace, move, copy, test. */
if (!parent) {free(parentptr); cJSON_Delete(value); return 9;} /* Couldn't find object to add to. */
else if (parent->type==cJSON_Array)
{
if (!strcmp(childptr,"-")) cJSON_AddItemToArray(parent,value);
else cJSON_InsertItemInArray(parent,atoi(childptr),value);
}
else if (parent->type==cJSON_Object)
{
cJSON_DeleteItemFromObject(parent,childptr);
cJSON_AddItemToObject(parent,childptr,value);
}
else
{
cJSON_Delete(value);
}
free(parentptr);
return 0;
}
int cJSONUtils_ApplyPatches(cJSON *object,cJSON *patches)
{
int err;
if (patches->type!=cJSON_Array) return 1; /* malformed patches. */
if (patches) patches=patches->child;
while (patches)
{
if ((err=cJSONUtils_ApplyPatch(object,patches))) return err;
patches=patches->next;
}
return 0;
}
static void cJSONUtils_GeneratePatch(cJSON *patches,const char *op,const char *path,const char *suffix,cJSON *val)
{
cJSON *patch=cJSON_CreateObject();
cJSON_AddItemToObject(patch,"op",cJSON_CreateString(op));
if (suffix)
{
char *newpath=(char*)malloc(strlen(path)+cJSONUtils_PointerEncodedstrlen(suffix)+2);
cJSONUtils_PointerEncodedstrcpy(newpath+sprintf(newpath,"%s/",path),suffix);
cJSON_AddItemToObject(patch,"path",cJSON_CreateString(newpath));
free(newpath);
}
else cJSON_AddItemToObject(patch,"path",cJSON_CreateString(path));
if (val) cJSON_AddItemToObject(patch,"value",cJSON_Duplicate(val,1));
cJSON_AddItemToArray(patches,patch);
}
void cJSONUtils_AddPatchToArray(cJSON *array,const char *op,const char *path,cJSON *val) {cJSONUtils_GeneratePatch(array,op,path,0,val);}
static void cJSONUtils_CompareToPatch(cJSON *patches,const char *path,cJSON *from,cJSON *to)
{
if (from->type!=to->type) {cJSONUtils_GeneratePatch(patches,"replace",path,0,to); return; }
switch (from->type)
{
case cJSON_Number:
if (from->valueint!=to->valueint || from->valuedouble!=to->valuedouble)
cJSONUtils_GeneratePatch(patches,"replace",path,0,to);
return;
case cJSON_String:
if (strcmp(from->valuestring,to->valuestring)!=0)
cJSONUtils_GeneratePatch(patches,"replace",path,0,to);
return;
case cJSON_Array:
{
int c;char *newpath=(char*)malloc(strlen(path)+23); /* Allow space for 64bit int. */
for (c=0,from=from->child,to=to->child;from && to;from=from->next,to=to->next,c++){
sprintf(newpath,"%s/%d",path,c); cJSONUtils_CompareToPatch(patches,newpath,from,to);
}
for (;from;from=from->next,c++) {sprintf(newpath,"%d",c); cJSONUtils_GeneratePatch(patches,"remove",path,newpath,0); }
for (;to;to=to->next,c++) cJSONUtils_GeneratePatch(patches,"add",path,"-",to);
free(newpath);
return;
}
case cJSON_Object:
{
cJSON *a,*b;
cJSONUtils_SortObject(from);
cJSONUtils_SortObject(to);
a=from->child,b=to->child;
while (a || b)
{
int diff=(!a)?1:(!b)?-1:cJSONUtils_strcasecmp(a->string,b->string);
if (!diff)
{
char *newpath=(char*)malloc(strlen(path)+cJSONUtils_PointerEncodedstrlen(a->string)+2);
cJSONUtils_PointerEncodedstrcpy(newpath+sprintf(newpath,"%s/",path),a->string);
cJSONUtils_CompareToPatch(patches,newpath,a,b);
free(newpath);
a=a->next;
b=b->next;
}
else if (diff<0) {cJSONUtils_GeneratePatch(patches,"remove",path,a->string,0); a=a->next;}
else {cJSONUtils_GeneratePatch(patches,"add",path,b->string,b); b=b->next;}
}
return;
}
default: break;
}
}
cJSON* cJSONUtils_GeneratePatches(cJSON *from,cJSON *to)
{
cJSON *patches=cJSON_CreateArray();
cJSONUtils_CompareToPatch(patches,"",from,to);
return patches;
}
static cJSON *cJSONUtils_SortList(cJSON *list)
{
cJSON *first=list,*second=list,*ptr=list;
if (!list || !list->next) return list; /* One entry is sorted already. */
while (ptr && ptr->next && cJSONUtils_strcasecmp(ptr->string,ptr->next->string)<0) ptr=ptr->next; /* Test for list sorted. */
if (!ptr || !ptr->next) return list; /* Leave sorted lists unmodified. */
ptr=list;
while (ptr) {second=second->next;ptr=ptr->next;if (ptr) ptr=ptr->next;} /* Walk two pointers to find the middle. */
if (second && second->prev) second->prev->next=0; /* Split the lists */
first=cJSONUtils_SortList(first); /* Recursively sort the sub-lists. */
second=cJSONUtils_SortList(second);
list=ptr=0;
while (first && second) /* Merge the sub-lists */
{
if (cJSONUtils_strcasecmp(first->string,second->string)<0)
{
if (!list) list=ptr=first;
else {ptr->next=first;first->prev=ptr;ptr=first;}
first=first->next;
}
else
{
if (!list) list=ptr=second;
else {ptr->next=second;second->prev=ptr;ptr=second;}
second=second->next;
}
}
if (first) { if (!list) return first; ptr->next=first; first->prev=ptr; } /* Append any tails. */
if (second) { if (!list) return second; ptr->next=second; second->prev=ptr; }
return list;
}
void cJSONUtils_SortObject(cJSON *object) {object->child=cJSONUtils_SortList(object->child);}
You can’t perform that action at this time.