SQLite

Check-in [3c4bee65d9]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Initial implementation of json_replace().
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | json
Files: files | file ages | folders
SHA1: 3c4bee65d93efc7f03f0f11817a068b02068d37c
User & Date: drh 2015-08-17 21:22:32.495
Context
2015-08-18
02:28
Initial implementation of json_set() and json_insert(). (check-in: 4aa49656d9 user: drh tags: json)
2015-08-17
21:22
Initial implementation of json_replace(). (check-in: 3c4bee65d9 user: drh tags: json)
20:14
Add an initial implementation for json_remove(). (check-in: 2a8267209d user: drh tags: json)
Changes
Unified Diff Ignore Whitespace Patch
Changes to ext/misc/json.c.
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
typedef struct Json Json;
struct Json {
  sqlite3_context *pCtx;   /* Function context - put error messages here */
  char *zBuf;              /* Append JSON content here */
  u64 nAlloc;              /* Bytes of storage available in zBuf[] */
  u64 nUsed;               /* Bytes of zBuf[] currently used */
  u8 bStatic;              /* True if zBuf is static space */
  u8 oom;                  /* True if an OOM has been encountered */
  char zSpace[100];        /* Initial static space */
};

/* JSON type values
*/
#define JSON_NULL     0
#define JSON_TRUE     1







|







38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
typedef struct Json Json;
struct Json {
  sqlite3_context *pCtx;   /* Function context - put error messages here */
  char *zBuf;              /* Append JSON content here */
  u64 nAlloc;              /* Bytes of storage available in zBuf[] */
  u64 nUsed;               /* Bytes of zBuf[] currently used */
  u8 bStatic;              /* True if zBuf is static space */
  u8 bErr;                 /* True if an error has been encountered */
  char zSpace[100];        /* Initial static space */
};

/* JSON type values
*/
#define JSON_NULL     0
#define JSON_TRUE     1
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
};

/* Bit values for the JsonNode.jnFlag field
*/
#define JNODE_RAW     0x01         /* Content is raw, not JSON encoded */
#define JNODE_ESCAPE  0x02         /* Content is text with \ escapes */
#define JNODE_REMOVE  0x04         /* Do not output */



/* A single node of parsed JSON
*/
typedef struct JsonNode JsonNode;
struct JsonNode {
  u8 eType;              /* One of the JSON_ type values */
  u8 jnFlags;            /* JNODE flags */

  u32 n;                 /* Bytes of content, or number of sub-nodes */
  const char *zJContent; /* JSON content */
};

/* A completely parsed JSON string
*/
typedef struct JsonParse JsonParse;
struct JsonParse {
  u32 nNode;         /* Number of slots of aNode[] used */
  u32 nAlloc;        /* Number of slots of aNode[] allocated */
  JsonNode *aNode;   /* Array of nodes containing the parse */
  const char *zJson; /* Original JSON string */
  u8 oom;            /* Set to true if out of memory */
};

/*
** Return the number of consecutive JsonNode slots need to represent
** the parsed JSON at pNode.  The minimum answer is 1.  For ARRAY and
** OBJECT types, the number might be larger.
*/
static u32 jsonSizeof(JsonNode *pNode){
  return pNode->eType>=JSON_ARRAY ? pNode->n+1 : 1;
}

/* Set the Json object to an empty string
*/
static void jsonZero(Json *p){
  p->zBuf = p->zSpace;
  p->nAlloc = sizeof(p->zSpace);
  p->nUsed = 0;
  p->bStatic = 1;
}

/* Initialize the Json object
*/
static void jsonInit(Json *p, sqlite3_context *pCtx){
  p->pCtx = pCtx;
  p->oom = 0;
  jsonZero(p);
}


/* Free all allocated memory and reset the Json object back to its
** initial state.
*/
static void jsonReset(Json *p){
  if( !p->bStatic ) sqlite3_free(p->zBuf);
  jsonZero(p);
}


/* Report an out-of-memory (OOM) condition 
*/
static void jsonOom(Json *p){

  p->oom = 1;
  sqlite3_result_error_nomem(p->pCtx);
  jsonReset(p);

}

/* Enlarge pJson->zBuf so that it can hold at least N more bytes.
** Return zero on success.  Return non-zero on an OOM error
*/
static int jsonGrow(Json *p, u32 N){
  u64 nTotal = N<p->nAlloc ? p->nAlloc*2 : p->nAlloc+N+10;
  char *zNew;
  if( p->bStatic ){
    if( p->oom ) return SQLITE_NOMEM;
    zNew = sqlite3_malloc64(nTotal);
    if( zNew==0 ){
      jsonOom(p);
      return SQLITE_NOMEM;
    }
    memcpy(zNew, p->zBuf, p->nUsed);
    p->zBuf = zNew;







>








>




















|
















|
















>
|
|
|
>









|







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
};

/* Bit values for the JsonNode.jnFlag field
*/
#define JNODE_RAW     0x01         /* Content is raw, not JSON encoded */
#define JNODE_ESCAPE  0x02         /* Content is text with \ escapes */
#define JNODE_REMOVE  0x04         /* Do not output */
#define JNODE_REPLACE 0x08         /* Replace with JsonNode.iVal */


/* A single node of parsed JSON
*/
typedef struct JsonNode JsonNode;
struct JsonNode {
  u8 eType;              /* One of the JSON_ type values */
  u8 jnFlags;            /* JNODE flags */
  u8 iVal;               /* Replacement value when JNODE_REPLACE */
  u32 n;                 /* Bytes of content, or number of sub-nodes */
  const char *zJContent; /* JSON content */
};

/* A completely parsed JSON string
*/
typedef struct JsonParse JsonParse;
struct JsonParse {
  u32 nNode;         /* Number of slots of aNode[] used */
  u32 nAlloc;        /* Number of slots of aNode[] allocated */
  JsonNode *aNode;   /* Array of nodes containing the parse */
  const char *zJson; /* Original JSON string */
  u8 oom;            /* Set to true if out of memory */
};

/*
** Return the number of consecutive JsonNode slots need to represent
** the parsed JSON at pNode.  The minimum answer is 1.  For ARRAY and
** OBJECT types, the number might be larger.
*/
static u32 jsonSize(JsonNode *pNode){
  return pNode->eType>=JSON_ARRAY ? pNode->n+1 : 1;
}

/* Set the Json object to an empty string
*/
static void jsonZero(Json *p){
  p->zBuf = p->zSpace;
  p->nAlloc = sizeof(p->zSpace);
  p->nUsed = 0;
  p->bStatic = 1;
}

/* Initialize the Json object
*/
static void jsonInit(Json *p, sqlite3_context *pCtx){
  p->pCtx = pCtx;
  p->bErr = 0;
  jsonZero(p);
}


/* Free all allocated memory and reset the Json object back to its
** initial state.
*/
static void jsonReset(Json *p){
  if( !p->bStatic ) sqlite3_free(p->zBuf);
  jsonZero(p);
}


/* Report an out-of-memory (OOM) condition 
*/
static void jsonOom(Json *p){
  if( !p->bErr ){
    p->bErr = 1;
    sqlite3_result_error_nomem(p->pCtx);
    jsonReset(p);
  }
}

/* Enlarge pJson->zBuf so that it can hold at least N more bytes.
** Return zero on success.  Return non-zero on an OOM error
*/
static int jsonGrow(Json *p, u32 N){
  u64 nTotal = N<p->nAlloc ? p->nAlloc*2 : p->nAlloc+N+10;
  char *zNew;
  if( p->bStatic ){
    if( p->bErr ) return 1;
    zNew = sqlite3_malloc64(nTotal);
    if( zNew==0 ){
      jsonOom(p);
      return SQLITE_NOMEM;
    }
    memcpy(zNew, p->zBuf, p->nUsed);
    p->zBuf = zNew;
168
169
170
171
172
173
174

175
176
177
178
179

180
181
182
183
184
185
186
*/
static void jsonAppendRaw(Json *p, const char *zIn, u32 N){
  if( (N+p->nUsed >= p->nAlloc) && jsonGrow(p,N)!=0 ) return;
  memcpy(p->zBuf+p->nUsed, zIn, N);
  p->nUsed += N;
}


/* Append the zero-terminated string zIn
*/
static void jsonAppend(Json *p, const char *zIn){
  jsonAppendRaw(p, zIn, (u32)strlen(zIn));
}


/* Append a single character
*/
static void jsonAppendChar(Json *p, char c){
  if( p->nUsed>=p->nAlloc && jsonGrow(p,1)!=0 ) return;
  p->zBuf[p->nUsed++] = c;
}







>





>







172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
*/
static void jsonAppendRaw(Json *p, const char *zIn, u32 N){
  if( (N+p->nUsed >= p->nAlloc) && jsonGrow(p,N)!=0 ) return;
  memcpy(p->zBuf+p->nUsed, zIn, N);
  p->nUsed += N;
}

#ifdef SQLITE_DEBUG
/* Append the zero-terminated string zIn
*/
static void jsonAppend(Json *p, const char *zIn){
  jsonAppendRaw(p, zIn, (u32)strlen(zIn));
}
#endif

/* Append a single character
*/
static void jsonAppendChar(Json *p, char c){
  if( p->nUsed>=p->nAlloc && jsonGrow(p,1)!=0 ) return;
  p->zBuf[p->nUsed++] = c;
}
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
      if( (p->nUsed+N+1-i > p->nAlloc) && jsonGrow(p,N+1-i)!=0 ) return;
      p->zBuf[p->nUsed++] = '\\';
    }
    p->zBuf[p->nUsed++] = c;
  }
  p->zBuf[p->nUsed++] = '"';
}







































/* Make the JSON in p the result of the SQL function.
*/
static void jsonResult(Json *p){
  if( p->oom==0 ){
    sqlite3_result_text64(p->pCtx, p->zBuf, p->nUsed, 
                          p->bStatic ? SQLITE_TRANSIENT : sqlite3_free,
                          SQLITE_UTF8);
    jsonZero(p);
  }
  assert( p->bStatic );
}

/*
** Convert the JsonNode pNode into a pure JSON string and
** append to pOut.  Subsubstructure is also included.  Return
** the number of JsonNode objects that are encoded.
*/
static int jsonRenderNode(JsonNode *pNode, Json *pOut){




  u32 j = 1;
  switch( pNode->eType ){
    case JSON_NULL: {
      jsonAppendRaw(pOut, "null", 4);
      break;
    }
    case JSON_TRUE: {








>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>



|













|
>
>
>
>







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
      if( (p->nUsed+N+1-i > p->nAlloc) && jsonGrow(p,N+1-i)!=0 ) return;
      p->zBuf[p->nUsed++] = '\\';
    }
    p->zBuf[p->nUsed++] = c;
  }
  p->zBuf[p->nUsed++] = '"';
}

/*
** Append a function parameter value to the JSON string under 
** construction.
*/
static void jsonAppendValue(
  Json *p,                       /* Append to this JSON string */
  sqlite3_value *pValue          /* Value to append */
){
  switch( sqlite3_value_type(pValue) ){
    case SQLITE_NULL: {
      jsonAppendRaw(p, "null", 4);
      break;
    }
    case SQLITE_INTEGER:
    case SQLITE_FLOAT: {
      const char *z = (const char*)sqlite3_value_text(pValue);
      u32 n = (u32)sqlite3_value_bytes(pValue);
      jsonAppendRaw(p, z, n);
      break;
    }
    case SQLITE_TEXT: {
      const char *z = (const char*)sqlite3_value_text(pValue);
      u32 n = (u32)sqlite3_value_bytes(pValue);
      jsonAppendString(p, z, n);
      break;
    }
    default: {
      if( p->bErr==0 ){
        sqlite3_result_error(p->pCtx, "JSON cannot hold BLOB values", -1);
        p->bErr = 1;
        jsonReset(p);
      }
      break;
    }
  }
}


/* Make the JSON in p the result of the SQL function.
*/
static void jsonResult(Json *p){
  if( p->bErr==0 ){
    sqlite3_result_text64(p->pCtx, p->zBuf, p->nUsed, 
                          p->bStatic ? SQLITE_TRANSIENT : sqlite3_free,
                          SQLITE_UTF8);
    jsonZero(p);
  }
  assert( p->bStatic );
}

/*
** Convert the JsonNode pNode into a pure JSON string and
** append to pOut.  Subsubstructure is also included.  Return
** the number of JsonNode objects that are encoded.
*/
static int jsonRenderNode(
  JsonNode *pNode,               /* The node to render */
  Json *pOut,                    /* Write JSON here */
  sqlite3_value **aReplace       /* Replacement values */
){
  u32 j = 1;
  switch( pNode->eType ){
    case JSON_NULL: {
      jsonAppendRaw(pOut, "null", 4);
      break;
    }
    case JSON_TRUE: {
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
    case JSON_INT: {
      jsonAppendRaw(pOut, pNode->zJContent, pNode->n);
      break;
    }
    case JSON_ARRAY: {
      jsonAppendChar(pOut, '[');
      while( j<=pNode->n ){

        if( pNode[j].jnFlags & JNODE_REMOVE ){



          j += jsonSizeof(&pNode[j]);
        }else{
          jsonAppendSeparator(pOut);
          j += jsonRenderNode(&pNode[j], pOut);
        }
      }
      jsonAppendChar(pOut, ']');
      break;
    }
    case JSON_OBJECT: {
      jsonAppendChar(pOut, '{');
      while( j<=pNode->n ){
        if( pNode[j+1].jnFlags & JNODE_REMOVE ){
          j += 1 + jsonSizeof(&pNode[j+1]);
        }else{
          jsonAppendSeparator(pOut);
          jsonRenderNode(&pNode[j], pOut);
          jsonAppendChar(pOut, ':');




          j += 1 + jsonRenderNode(&pNode[j+1], pOut);

        }
      }
      jsonAppendChar(pOut, '}');
      break;
    }
  }
  return j;
}

/*
** Make the JsonNode the return value of the function.
*/
static void jsonReturn(JsonNode *pNode, sqlite3_context *pCtx){




  switch( pNode->eType ){
    case JSON_NULL: {
      sqlite3_result_null(pCtx);
      break;
    }
    case JSON_TRUE: {
      sqlite3_result_int(pCtx, 1);







>
|
>
>
>
|


|









|


|

>
>
>
>
|
>












|
>
>
>
>







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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
    case JSON_INT: {
      jsonAppendRaw(pOut, pNode->zJContent, pNode->n);
      break;
    }
    case JSON_ARRAY: {
      jsonAppendChar(pOut, '[');
      while( j<=pNode->n ){
        if( pNode[j].jnFlags & (JNODE_REMOVE|JNODE_REPLACE) ){
          if( pNode[j].jnFlags & JNODE_REPLACE ){
            jsonAppendSeparator(pOut);
            jsonAppendValue(pOut, aReplace[pNode[j].iVal]);
          }
          j += jsonSize(&pNode[j]);
        }else{
          jsonAppendSeparator(pOut);
          j += jsonRenderNode(&pNode[j], pOut, aReplace);
        }
      }
      jsonAppendChar(pOut, ']');
      break;
    }
    case JSON_OBJECT: {
      jsonAppendChar(pOut, '{');
      while( j<=pNode->n ){
        if( pNode[j+1].jnFlags & JNODE_REMOVE ){
          j += 1 + jsonSize(&pNode[j+1]);
        }else{
          jsonAppendSeparator(pOut);
          jsonRenderNode(&pNode[j], pOut, aReplace);
          jsonAppendChar(pOut, ':');
          if( pNode[j+1].jnFlags & JNODE_REPLACE ){
            jsonAppendValue(pOut, aReplace[pNode[j+1].iVal]);
            j += 1 + jsonSize(&pNode[j+1]);
          }else{
            j += 1 + jsonRenderNode(&pNode[j+1], pOut, aReplace);
          }
        }
      }
      jsonAppendChar(pOut, '}');
      break;
    }
  }
  return j;
}

/*
** Make the JsonNode the return value of the function.
*/
static void jsonReturn(
  JsonNode *pNode,            /* Node to return */
  sqlite3_context *pCtx,      /* Return value for this function */
  sqlite3_value **aReplace    /* Array of replacement values */
){
  switch( pNode->eType ){
    case JSON_NULL: {
      sqlite3_result_null(pCtx);
      break;
    }
    case JSON_TRUE: {
      sqlite3_result_int(pCtx, 1);
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
      }
      break;
    }
    case JSON_ARRAY:
    case JSON_OBJECT: {
      Json s;
      jsonInit(&s, pCtx);
      jsonRenderNode(pNode, &s);
      jsonResult(&s);
      break;
    }
  }
}

/*







|







455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
      }
      break;
    }
    case JSON_ARRAY:
    case JSON_OBJECT: {
      Json s;
      jsonInit(&s, pCtx);
      jsonRenderNode(pNode, &s, aReplace);
      jsonResult(&s);
      break;
    }
  }
}

/*
433
434
435
436
437
438
439

440
441
442
443
444
445
446
    }
    pParse->nAlloc = nNew;
    pParse->aNode = pNew;
  }
  p = &pParse->aNode[pParse->nNode];
  p->eType = (u8)eType;
  p->jnFlags = 0;

  p->n = n;
  p->zJContent = zContent;
  return pParse->nNode++;
}

/*
** Parse a single JSON value which begins at pParse->zJson[i].  Return the







>







494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
    }
    pParse->nAlloc = nNew;
    pParse->aNode = pNew;
  }
  p = &pParse->aNode[pParse->nNode];
  p->eType = (u8)eType;
  p->jnFlags = 0;
  p->iVal = 0;
  p->n = n;
  p->zJContent = zContent;
  return pParse->nNode++;
}

/*
** Parse a single JSON value which begins at pParse->zJson[i].  Return the
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
    while( j<=pRoot->n ){
      if( pRoot[j].n==i+2
       && strncmp(&pRoot[j].zJContent[1],zPath,i)==0
      ){
        return jsonLookup(&pRoot[j+1], &zPath[i]);
      }
      j++;
      j += jsonSizeof(&pRoot[j]);
    }
  }else if( zPath[0]=='[' && isdigit(zPath[1]) ){
    if( pRoot->eType!=JSON_ARRAY ) return 0;
    i = 0;
    zPath++;
    while( isdigit(zPath[0]) ){
      i = i + zPath[0] - '0';
      zPath++;
    }
    if( zPath[0]!=']' ) return 0;
    zPath++;
    j = 1;
    while( i>0 && j<=pRoot->n ){
      j += jsonSizeof(&pRoot[j]);
      i--;
    }
    if( j<=pRoot->n ){
      return jsonLookup(&pRoot[j], zPath);
    }
  }
  return 0;







|













|







681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
    while( j<=pRoot->n ){
      if( pRoot[j].n==i+2
       && strncmp(&pRoot[j].zJContent[1],zPath,i)==0
      ){
        return jsonLookup(&pRoot[j+1], &zPath[i]);
      }
      j++;
      j += jsonSize(&pRoot[j]);
    }
  }else if( zPath[0]=='[' && isdigit(zPath[1]) ){
    if( pRoot->eType!=JSON_ARRAY ) return 0;
    i = 0;
    zPath++;
    while( isdigit(zPath[0]) ){
      i = i + zPath[0] - '0';
      zPath++;
    }
    if( zPath[0]!=']' ) return 0;
    zPath++;
    j = 1;
    while( i>0 && j<=pRoot->n ){
      j += jsonSize(&pRoot[j]);
      i--;
    }
    if( j<=pRoot->n ){
      return jsonLookup(&pRoot[j], zPath);
    }
  }
  return 0;
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
static void jsonTest1Func(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  JsonParse x;  /* The parse */
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0])) ) return;
  jsonReturn(x.aNode, context);
  sqlite3_free(x.aNode);
}

/*
** The json_nodecount(JSON) function returns the number of nodes in the
** input JSON string.
*/







|







752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
static void jsonTest1Func(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  JsonParse x;  /* The parse */
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0])) ) return;
  jsonReturn(x.aNode, context, 0);
  sqlite3_free(x.aNode);
}

/*
** The json_nodecount(JSON) function returns the number of nodes in the
** input JSON string.
*/
726
727
728
729
730
731
732
733
734
735

736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
static void jsonArrayFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int i;
  Json jx;
  char cSep = '[';

  jsonInit(&jx, context);

  for(i=0; i<argc; i++){
    jsonAppendRaw(&jx, &cSep, 1);
    cSep = ',';
    switch( sqlite3_value_type(argv[i]) ){
      case SQLITE_NULL: {
        jsonAppendRaw(&jx, "null", 4);
        break;
      }
      case SQLITE_INTEGER:
      case SQLITE_FLOAT: {
        const char *z = (const char*)sqlite3_value_text(argv[i]);
        u32 n = (u32)sqlite3_value_bytes(argv[i]);
        jsonAppendRaw(&jx, z, n);
        break;
      }
      case SQLITE_TEXT: {
        const char *z = (const char*)sqlite3_value_text(argv[i]);
        u32 n = (u32)sqlite3_value_bytes(argv[i]);
        jsonAppendString(&jx, z, n);
        break;
      }
      default: {
        jsonZero(&jx);
        sqlite3_result_error(context, "JSON cannot hold BLOB values", -1);
        return;
      }
    }
  }
  jsonAppendRaw(&jx, "]", 1);
  jsonResult(&jx);
}


/*
** json_array_length(JSON)
** json_array_length(JSON, PATH)







<


>

|
<
<
<
<
<
<
<
<
<
<
|
<
|
<
<
<
|
<
<
<
<
<
<
<
<
<
<







788
789
790
791
792
793
794

795
796
797
798
799










800

801



802










803
804
805
806
807
808
809
static void jsonArrayFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int i;
  Json jx;


  jsonInit(&jx, context);
  jsonAppendChar(&jx, '[');
  for(i=0; i<argc; i++){
    jsonAppendSeparator(&jx);










    jsonAppendValue(&jx, argv[i]);

  }



  jsonAppendChar(&jx, ']');










  jsonResult(&jx);
}


/*
** json_array_length(JSON)
** json_array_length(JSON, PATH)
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
  }
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0]))==0 ){
    if( x.nNode ){
      JsonNode *pNode = x.aNode;
      if( zPath ) pNode = jsonLookup(pNode, zPath);
      if( pNode->eType==JSON_ARRAY ){
        for(i=1; i<=pNode->n; n++){
          i += jsonSizeof(&pNode[i]);
        }
      }
    }
    sqlite3_free(x.aNode);
  }
  sqlite3_result_int64(context, n);
}







|







831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
  }
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0]))==0 ){
    if( x.nNode ){
      JsonNode *pNode = x.aNode;
      if( zPath ) pNode = jsonLookup(pNode, zPath);
      if( pNode->eType==JSON_ARRAY ){
        for(i=1; i<=pNode->n; n++){
          i += jsonSize(&pNode[i]);
        }
      }
    }
    sqlite3_free(x.aNode);
  }
  sqlite3_result_int64(context, n);
}
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857

858
859
860
861
862
863
864
865

866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
  zPath = (const char*)sqlite3_value_text(argv[1]);
  if( zPath==0 ) return;
  if( zPath[0]!='$' ) return;
  zPath++;
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0])) ) return;
  pNode = jsonLookup(x.aNode, zPath);
  if( pNode ){
    jsonReturn(pNode, context);
  }
  sqlite3_free(x.aNode);
}

/*
** Implementation of the json_object(NAME,VALUE,...) function.  Return a JSON
** object that contains all name/value given in arguments.  Or if any name
** is not a string or if any value is a BLOB, throw an error.
*/
static void jsonObjectFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int i;
  Json jx;
  char cSep = '{';
  const char *z;
  u32 n;

  if( argc&1 ){
    sqlite3_result_error(context, "json_object() requires an even number "
                                  "of arguments", -1);
    return;
  }
  jsonInit(&jx, context);

  for(i=0; i<argc; i+=2){
    jsonAppendRaw(&jx, &cSep, 1);
    cSep = ',';
    if( sqlite3_value_type(argv[i])!=SQLITE_TEXT ){
      sqlite3_result_error(context, "json_object() labels must be TEXT", -1);
      jsonZero(&jx);
      return;
    }

    z = (const char*)sqlite3_value_text(argv[i]);
    n = (u32)sqlite3_value_bytes(argv[i]);
    jsonAppendString(&jx, z, n);
    jsonAppendRaw(&jx, ":", 1);
    switch( sqlite3_value_type(argv[i+1]) ){
      case SQLITE_NULL: {
        jsonAppendRaw(&jx, "null", 4);
        break;
      }
      case SQLITE_INTEGER:
      case SQLITE_FLOAT: {
        z = (const char*)sqlite3_value_text(argv[i+1]);
        n = (u32)sqlite3_value_bytes(argv[i+1]);
        jsonAppendRaw(&jx, z, n);
        break;
      }
      case SQLITE_TEXT: {
        z = (const char*)sqlite3_value_text(argv[i+1]);
        n = (u32)sqlite3_value_bytes(argv[i+1]);
        jsonAppendString(&jx, z, n);
        break;
      }
      default: {
        jsonZero(&jx);
        sqlite3_result_error(context, "JSON cannot hold BLOB values", -1);
        return;
      }
    }
  }
  jsonAppendRaw(&jx, "}", 1);
  jsonResult(&jx);
}


/*
** json_remove(JSON, PATH, ...)
**







|
















<









>

<
<





>



|
<
<
<
<
<
<
<
<
<
|
<
|
<
<
<
|
<
<
<
<
<
<
<
<
<
<







862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885

886
887
888
889
890
891
892
893
894
895
896


897
898
899
900
901
902
903
904
905
906









907

908



909










910
911
912
913
914
915
916
  zPath = (const char*)sqlite3_value_text(argv[1]);
  if( zPath==0 ) return;
  if( zPath[0]!='$' ) return;
  zPath++;
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0])) ) return;
  pNode = jsonLookup(x.aNode, zPath);
  if( pNode ){
    jsonReturn(pNode, context, 0);
  }
  sqlite3_free(x.aNode);
}

/*
** Implementation of the json_object(NAME,VALUE,...) function.  Return a JSON
** object that contains all name/value given in arguments.  Or if any name
** is not a string or if any value is a BLOB, throw an error.
*/
static void jsonObjectFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int i;
  Json jx;

  const char *z;
  u32 n;

  if( argc&1 ){
    sqlite3_result_error(context, "json_object() requires an even number "
                                  "of arguments", -1);
    return;
  }
  jsonInit(&jx, context);
  jsonAppendChar(&jx, '{');
  for(i=0; i<argc; i+=2){


    if( sqlite3_value_type(argv[i])!=SQLITE_TEXT ){
      sqlite3_result_error(context, "json_object() labels must be TEXT", -1);
      jsonZero(&jx);
      return;
    }
    jsonAppendSeparator(&jx);
    z = (const char*)sqlite3_value_text(argv[i]);
    n = (u32)sqlite3_value_bytes(argv[i]);
    jsonAppendString(&jx, z, n);
    jsonAppendChar(&jx, ':');









    jsonAppendValue(&jx, argv[i+1]);

  }



  jsonAppendChar(&jx, '}');










  jsonResult(&jx);
}


/*
** json_remove(JSON, PATH, ...)
**
921
922
923
924
925
926
927











































928
929
930
931
932
933
934
935
      zPath = (const char*)sqlite3_value_text(argv[i]);
      if( zPath==0 ) continue;
      if( zPath[0]!='$' ) continue;
      pNode = jsonLookup(x.aNode, &zPath[1]);
      if( pNode ) pNode->jnFlags |= JNODE_REMOVE;
    }
    if( (x.aNode[0].jnFlags & JNODE_REMOVE)==0 ){











































      jsonReturn(x.aNode, context);
    }
  }
  sqlite3_free(x.aNode);
}

/*
** json_type(JSON)







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|







935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
      zPath = (const char*)sqlite3_value_text(argv[i]);
      if( zPath==0 ) continue;
      if( zPath[0]!='$' ) continue;
      pNode = jsonLookup(x.aNode, &zPath[1]);
      if( pNode ) pNode->jnFlags |= JNODE_REMOVE;
    }
    if( (x.aNode[0].jnFlags & JNODE_REMOVE)==0 ){
      jsonReturn(x.aNode, context, 0);
    }
  }
  sqlite3_free(x.aNode);
}

/*
** json_replace(JSON, PATH, VALUE, ...)
**
** Replace the value at PATH with VALUE.  If PATH does not already exist,
** this routine is a no-op.  If JSON is ill-formed, return NULL.
*/
static void jsonReplaceFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  JsonParse x;          /* The parse */
  JsonNode *pNode;
  const char *zPath;
  u32 i;

  if( argc<1 ) return;
  if( (argc&1)==0 ) {
    sqlite3_result_error(context,
                         "json_replace() needs an odd number of arguments", -1);
    return;
  }
  if( jsonParse(&x, (const char*)sqlite3_value_text(argv[0])) ) return;
  if( x.nNode ){
    for(i=1; i<argc; i+=2){
      zPath = (const char*)sqlite3_value_text(argv[i]);
      if( zPath==0 ) continue;
      if( zPath[0]!='$' ) continue;
      pNode = jsonLookup(x.aNode, &zPath[1]);
      if( pNode ){
        pNode->jnFlags |= JNODE_REPLACE;
        pNode->iVal = i+1;
      }
    }
    if( x.aNode[0].jnFlags & JNODE_REPLACE ){
      sqlite3_result_value(context, argv[x.aNode[0].iVal]);
    }else{
      jsonReturn(x.aNode, context, argv);
    }
  }
  sqlite3_free(x.aNode);
}

/*
** json_type(JSON)
980
981
982
983
984
985
986

987
988
989
990
991
992
993
  } aFunc[] = {
    { "json_array",          -1,    jsonArrayFunc         },
    { "json_array_length",    1,    jsonArrayLengthFunc   },
    { "json_array_length",    2,    jsonArrayLengthFunc   },
    { "json_extract",         2,    jsonExtractFunc       },
    { "json_object",         -1,    jsonObjectFunc        },
    { "json_remove",         -1,    jsonRemoveFunc        },

    { "json_type",            1,    jsonTypeFunc          },
    { "json_type",            2,    jsonTypeFunc          },

#if SQLITE_DEBUG
    /* DEBUG and TESTING functions */
    { "json_parse",           1,    jsonParseFunc     },
    { "json_test1",           1,    jsonTest1Func     },







>







1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
  } aFunc[] = {
    { "json_array",          -1,    jsonArrayFunc         },
    { "json_array_length",    1,    jsonArrayLengthFunc   },
    { "json_array_length",    2,    jsonArrayLengthFunc   },
    { "json_extract",         2,    jsonExtractFunc       },
    { "json_object",         -1,    jsonObjectFunc        },
    { "json_remove",         -1,    jsonRemoveFunc        },
    { "json_replace",        -1,    jsonReplaceFunc       },
    { "json_type",            1,    jsonTypeFunc          },
    { "json_type",            2,    jsonTypeFunc          },

#if SQLITE_DEBUG
    /* DEBUG and TESTING functions */
    { "json_parse",           1,    jsonParseFunc     },
    { "json_test1",           1,    jsonTest1Func     },