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Overview
| Comment: | Simplifications to the json1.c logic. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
1646a2bd85f87d03a14fcaec288107f5 |
| User & Date: | drh 2015-09-21 22:53:16 |
Context
|
2015-09-21
| ||
| 23:49 | Fix compilation under older versions of MSVC. check-in: 17150ada user: mistachkin tags: trunk | |
| 22:53 | Simplifications to the json1.c logic. check-in: 1646a2bd user: drh tags: trunk | |
|
2015-09-20
| ||
| 22:57 | Fix an overly-strict assert() in the btree logic. check-in: 825ce320 user: drh tags: trunk | |
Changes
Changes to ext/misc/json1.c.
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 ... 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 ... 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 ... 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 ... 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 ... 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 ... 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 .... 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 .... 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 .... 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 .... 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 .... 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 .... 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 .... 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 .... 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 .... 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 |
*/
static void jsonRenderNode(
JsonNode *pNode, /* The node to render */
JsonString *pOut, /* Write JSON here */
sqlite3_value **aReplace /* Replacement values */
){
switch( pNode->eType ){
case JSON_NULL: {
jsonAppendRaw(pOut, "null", 4);
break;
}
case JSON_TRUE: {
jsonAppendRaw(pOut, "true", 4);
break;
}
................................................................................
*/
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);
break;
}
................................................................................
if( z[0]=='-' ){ z++; }
while( z[0]>='0' && z[0]<='9' ){ i = i*10 + *(z++) - '0'; }
if( pNode->u.zJContent[0]=='-' ){ i = -i; }
sqlite3_result_int64(pCtx, i);
break;
}
case JSON_STRING: {
if( pNode->jnFlags & JNODE_RAW ){
sqlite3_result_text(pCtx, pNode->u.zJContent, pNode->n,
SQLITE_TRANSIENT);
}else if( (pNode->jnFlags & JNODE_ESCAPE)==0 ){
/* JSON formatted without any backslash-escapes */
sqlite3_result_text(pCtx, pNode->u.zJContent+1, pNode->n-2,
SQLITE_TRANSIENT);
}else{
/* Translate JSON formatted string into raw text */
u32 i;
u32 n = pNode->n;
................................................................................
/* Parse object */
iThis = jsonParseAddNode(pParse, JSON_OBJECT, 0, 0);
if( iThis<0 ) return -1;
for(j=i+1;;j++){
while( safe_isspace(pParse->zJson[j]) ){ j++; }
x = jsonParseValue(pParse, j);
if( x<0 ){
if( x==(-2) && pParse->nNode==(u32)iThis+1 ) return j+1;
return -1;
}
if( pParse->oom ) return -1;
pNode = &pParse->aNode[pParse->nNode-1];
if( pNode->eType!=JSON_STRING ) return -1;
pNode->jnFlags |= JNODE_LABEL;
j = x;
................................................................................
/* Parse array */
iThis = jsonParseAddNode(pParse, JSON_ARRAY, 0, 0);
if( iThis<0 ) return -1;
for(j=i+1;;j++){
while( safe_isspace(pParse->zJson[j]) ){ j++; }
x = jsonParseValue(pParse, j);
if( x<0 ){
if( x==(-3) && pParse->nNode==(u32)iThis+1 ) return j+1;
return -1;
}
j = x;
while( safe_isspace(pParse->zJson[j]) ){ j++; }
c = pParse->zJson[j];
if( c==',' ) continue;
if( c!=']' ) return -1;
................................................................................
if( zPath[0]=='.' ){
if( pRoot->eType!=JSON_OBJECT ) return 0;
zPath++;
if( zPath[0]=='"' ){
zKey = zPath + 1;
for(i=1; zPath[i] && zPath[i]!='"'; i++){}
nKey = i-1;
if( zPath[i] ) i++;
}else{
zKey = zPath;
for(i=0; zPath[i] && zPath[i]!='.' && zPath[i]!='['; i++){}
nKey = i;
}
if( nKey==0 ){
*pzErr = zPath;
................................................................................
JsonParse *pParse, /* The JSON to search */
const char *zPath, /* The path to search */
int *pApnd, /* Append nodes to complete path if not NULL */
sqlite3_context *pCtx /* Report errors here, if not NULL */
){
const char *zErr = 0;
JsonNode *pNode = 0;
if( zPath==0 ) return 0;
if( zPath[0]!='$' ){
zErr = zPath;
goto lookup_err;
}
zPath++;
pNode = jsonLookupStep(pParse, 0, zPath, pApnd, &zErr);
return pNode;
lookup_err:
pParse->nErr++;
if( zErr!=0 && pCtx!=0 ){
char *z = jsonPathSyntaxError(zErr);
if( z ){
sqlite3_result_error(pCtx, z, -1);
sqlite3_free(z);
}else{
sqlite3_result_error_nomem(pCtx);
}
}
return 0;
}
/*
** Report the wrong number of arguments for json_insert(), json_replace()
................................................................................
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
sqlite3_int64 n = 0;
u32 i;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
JsonNode *pNode;
if( argc==2 ){
const char *zPath = (const char*)sqlite3_value_text(argv[1]);
pNode = jsonLookup(&x, zPath, 0, ctx);
}else{
pNode = x.aNode;
}
if( pNode==0 ){
x.nErr = 1;
}else if( pNode->eType==JSON_ARRAY ){
assert( (pNode->jnFlags & JNODE_APPEND)==0 );
for(i=1; i<=pNode->n; n++){
i += jsonNodeSize(&pNode[i]);
}
}
}
if( x.nErr==0 ) sqlite3_result_int64(ctx, n);
jsonParseReset(&x);
}
/*
................................................................................
JsonParse x; /* The parse */
JsonNode *pNode;
const char *zPath;
u32 i;
if( argc<1 ) return;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i++){
zPath = (const char*)sqlite3_value_text(argv[i]);
if( zPath==0 ) goto remove_done;
pNode = jsonLookup(&x, zPath, 0, ctx);
if( x.nErr ) goto remove_done;
if( pNode ) pNode->jnFlags |= JNODE_REMOVE;
}
if( (x.aNode[0].jnFlags & JNODE_REMOVE)==0 ){
jsonReturnJson(x.aNode, ctx, 0);
}
}
remove_done:
jsonParseReset(&x);
}
/*
** json_replace(JSON, PATH, VALUE, ...)
................................................................................
if( argc<1 ) return;
if( (argc&1)==0 ) {
jsonWrongNumArgs(ctx, "replace");
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i+=2){
zPath = (const char*)sqlite3_value_text(argv[i]);
pNode = jsonLookup(&x, zPath, 0, ctx);
if( x.nErr ) goto replace_err;
if( pNode ){
pNode->jnFlags |= (u8)JNODE_REPLACE;
pNode->iVal = (u8)(i+1);
}
}
if( x.aNode[0].jnFlags & JNODE_REPLACE ){
sqlite3_result_value(ctx, argv[x.aNode[0].iVal]);
}else{
jsonReturnJson(x.aNode, ctx, argv);
}
}
replace_err:
jsonParseReset(&x);
}
/*
** json_set(JSON, PATH, VALUE, ...)
................................................................................
if( argc<1 ) return;
if( (argc&1)==0 ) {
jsonWrongNumArgs(ctx, bIsSet ? "set" : "insert");
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i+=2){
zPath = (const char*)sqlite3_value_text(argv[i]);
bApnd = 0;
pNode = jsonLookup(&x, zPath, &bApnd, ctx);
if( x.oom ){
sqlite3_result_error_nomem(ctx);
goto jsonSetDone;
}else if( x.nErr ){
goto jsonSetDone;
}else if( pNode && (bApnd || bIsSet) ){
pNode->jnFlags |= (u8)JNODE_REPLACE;
pNode->iVal = (u8)(i+1);
}
}
if( x.aNode[0].jnFlags & JNODE_REPLACE ){
sqlite3_result_value(ctx, argv[x.aNode[0].iVal]);
}else{
jsonReturnJson(x.aNode, ctx, argv);
}
}
jsonSetDone:
jsonParseReset(&x);
}
/*
** json_type(JSON)
................................................................................
static void jsonTypeFunc(
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
const char *zPath;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
JsonNode *pNode;
if( argc==2 ){
zPath = (const char*)sqlite3_value_text(argv[1]);
pNode = jsonLookup(&x, zPath, 0, ctx);
}else{
pNode = x.aNode;
}
if( pNode ){
sqlite3_result_text(ctx, jsonType[pNode->eType], -1, SQLITE_STATIC);
}
}
jsonParseReset(&x);
}
/*
** json_valid(JSON)
**
................................................................................
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
int rc = 0;
UNUSED_PARAM(argc);
if( jsonParse(&x, 0, (const char*)sqlite3_value_text(argv[0]))==0
&& x.nNode>0
){
rc = 1;
}
jsonParseReset(&x);
sqlite3_result_int(ctx, rc);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
UNUSED_PARAM(idxStr);
UNUSED_PARAM(argc);
jsonEachCursorReset(p);
if( idxNum==0 ) return SQLITE_OK;
z = (const char*)sqlite3_value_text(argv[0]);
if( z==0 ) return SQLITE_OK;
if( idxNum&2 ){
zRoot = (const char*)sqlite3_value_text(argv[1]);
if( zRoot==0 ) return SQLITE_OK;
if( zRoot[0]!='$' ){
sqlite3_free(cur->pVtab->zErrMsg);
cur->pVtab->zErrMsg = jsonPathSyntaxError(zRoot);
return cur->pVtab->zErrMsg ? SQLITE_ERROR : SQLITE_NOMEM;
}
}
n = sqlite3_value_bytes(argv[0]);
p->zJson = sqlite3_malloc64( n+1 );
if( p->zJson==0 ) return SQLITE_NOMEM;
memcpy(p->zJson, z, (size_t)n+1);
if( jsonParse(&p->sParse, 0, p->zJson) ){
int rc = SQLITE_NOMEM;
if( p->sParse.oom==0 ){
................................................................................
}else if( p->bRecursive && jsonParseFindParents(&p->sParse) ){
jsonEachCursorReset(p);
return SQLITE_NOMEM;
}else{
JsonNode *pNode;
if( idxNum==3 ){
const char *zErr = 0;
n = sqlite3_value_bytes(argv[1]);
p->zRoot = sqlite3_malloc64( n+1 );
if( p->zRoot==0 ) return SQLITE_NOMEM;
memcpy(p->zRoot, zRoot, (size_t)n+1);
pNode = jsonLookupStep(&p->sParse, 0, p->zRoot+1, 0, &zErr);
if( p->sParse.nErr ){
sqlite3_free(cur->pVtab->zErrMsg);
cur->pVtab->zErrMsg = jsonPathSyntaxError(zErr);
jsonEachCursorReset(p);
return cur->pVtab->zErrMsg ? SQLITE_ERROR : SQLITE_NOMEM;
}else if( pNode==0 ){
return SQLITE_OK;
}
................................................................................
}else{
p->i++;
}
}else{
p->iEnd = p->i+1;
}
}
return p->sParse.oom ? SQLITE_NOMEM : SQLITE_OK;
}
/* The methods of the json_each virtual table */
static sqlite3_module jsonEachModule = {
0, /* iVersion */
0, /* xCreate */
jsonEachConnect, /* xConnect */
|
| > | > > > > > > > | | | | > > > > > > | | | | | | | | < > | < | | | | | | | | | | | | < | | | | | | | | | | < | | | | | | | | | | | | | | < | | | | | | | | | | | | | | | | | | | < > | < | | | | | | | | < | < < < < < < < < < < < > > > > > | > | | |
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 ... 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 ... 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 ... 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 ... 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 ... 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 ... 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 .... 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 .... 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 .... 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 .... 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 .... 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 .... 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 .... 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 .... 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 .... 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 |
*/
static void jsonRenderNode(
JsonNode *pNode, /* The node to render */
JsonString *pOut, /* Write JSON here */
sqlite3_value **aReplace /* Replacement values */
){
switch( pNode->eType ){
default: {
assert( pNode->eType==JSON_NULL );
jsonAppendRaw(pOut, "null", 4);
break;
}
case JSON_TRUE: {
jsonAppendRaw(pOut, "true", 4);
break;
}
................................................................................
*/
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 ){
default: {
assert( pNode->eType==JSON_NULL );
sqlite3_result_null(pCtx);
break;
}
case JSON_TRUE: {
sqlite3_result_int(pCtx, 1);
break;
}
................................................................................
if( z[0]=='-' ){ z++; }
while( z[0]>='0' && z[0]<='9' ){ i = i*10 + *(z++) - '0'; }
if( pNode->u.zJContent[0]=='-' ){ i = -i; }
sqlite3_result_int64(pCtx, i);
break;
}
case JSON_STRING: {
#if 0 /* Never happens because JNODE_RAW is only set by json_set(),
** json_insert() and json_replace() and those routines do not
** call jsonReturn() */
if( pNode->jnFlags & JNODE_RAW ){
sqlite3_result_text(pCtx, pNode->u.zJContent, pNode->n,
SQLITE_TRANSIENT);
}else
#endif
assert( (pNode->jnFlags & JNODE_RAW)==0 );
if( (pNode->jnFlags & JNODE_ESCAPE)==0 ){
/* JSON formatted without any backslash-escapes */
sqlite3_result_text(pCtx, pNode->u.zJContent+1, pNode->n-2,
SQLITE_TRANSIENT);
}else{
/* Translate JSON formatted string into raw text */
u32 i;
u32 n = pNode->n;
................................................................................
/* Parse object */
iThis = jsonParseAddNode(pParse, JSON_OBJECT, 0, 0);
if( iThis<0 ) return -1;
for(j=i+1;;j++){
while( safe_isspace(pParse->zJson[j]) ){ j++; }
x = jsonParseValue(pParse, j);
if( x<0 ){
if( x==(-2) ) return j+1;
return -1;
}
if( pParse->oom ) return -1;
pNode = &pParse->aNode[pParse->nNode-1];
if( pNode->eType!=JSON_STRING ) return -1;
pNode->jnFlags |= JNODE_LABEL;
j = x;
................................................................................
/* Parse array */
iThis = jsonParseAddNode(pParse, JSON_ARRAY, 0, 0);
if( iThis<0 ) return -1;
for(j=i+1;;j++){
while( safe_isspace(pParse->zJson[j]) ){ j++; }
x = jsonParseValue(pParse, j);
if( x<0 ){
if( x==(-3) ) return j+1;
return -1;
}
j = x;
while( safe_isspace(pParse->zJson[j]) ){ j++; }
c = pParse->zJson[j];
if( c==',' ) continue;
if( c!=']' ) return -1;
................................................................................
if( zPath[0]=='.' ){
if( pRoot->eType!=JSON_OBJECT ) return 0;
zPath++;
if( zPath[0]=='"' ){
zKey = zPath + 1;
for(i=1; zPath[i] && zPath[i]!='"'; i++){}
nKey = i-1;
if( zPath[i] ){
i++;
}else{
*pzErr = zPath;
return 0;
}
}else{
zKey = zPath;
for(i=0; zPath[i] && zPath[i]!='.' && zPath[i]!='['; i++){}
nKey = i;
}
if( nKey==0 ){
*pzErr = zPath;
................................................................................
JsonParse *pParse, /* The JSON to search */
const char *zPath, /* The path to search */
int *pApnd, /* Append nodes to complete path if not NULL */
sqlite3_context *pCtx /* Report errors here, if not NULL */
){
const char *zErr = 0;
JsonNode *pNode = 0;
char *zMsg;
if( zPath==0 ) return 0;
if( zPath[0]!='$' ){
zErr = zPath;
goto lookup_err;
}
zPath++;
pNode = jsonLookupStep(pParse, 0, zPath, pApnd, &zErr);
if( zErr==0 ) return pNode;
lookup_err:
pParse->nErr++;
assert( zErr!=0 && pCtx!=0 );
zMsg = jsonPathSyntaxError(zErr);
if( zMsg ){
sqlite3_result_error(pCtx, zMsg, -1);
sqlite3_free(zMsg);
}else{
sqlite3_result_error_nomem(pCtx);
}
return 0;
}
/*
** Report the wrong number of arguments for json_insert(), json_replace()
................................................................................
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
sqlite3_int64 n = 0;
u32 i;
JsonNode *pNode;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
assert( x.nNode );
if( argc==2 ){
const char *zPath = (const char*)sqlite3_value_text(argv[1]);
pNode = jsonLookup(&x, zPath, 0, ctx);
}else{
pNode = x.aNode;
}
if( pNode==0 ){
x.nErr = 1;
}else if( pNode->eType==JSON_ARRAY ){
assert( (pNode->jnFlags & JNODE_APPEND)==0 );
for(i=1; i<=pNode->n; n++){
i += jsonNodeSize(&pNode[i]);
}
}
if( x.nErr==0 ) sqlite3_result_int64(ctx, n);
jsonParseReset(&x);
}
/*
................................................................................
JsonParse x; /* The parse */
JsonNode *pNode;
const char *zPath;
u32 i;
if( argc<1 ) return;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
assert( x.nNode );
for(i=1; i<(u32)argc; i++){
zPath = (const char*)sqlite3_value_text(argv[i]);
if( zPath==0 ) goto remove_done;
pNode = jsonLookup(&x, zPath, 0, ctx);
if( x.nErr ) goto remove_done;
if( pNode ) pNode->jnFlags |= JNODE_REMOVE;
}
if( (x.aNode[0].jnFlags & JNODE_REMOVE)==0 ){
jsonReturnJson(x.aNode, ctx, 0);
}
remove_done:
jsonParseReset(&x);
}
/*
** json_replace(JSON, PATH, VALUE, ...)
................................................................................
if( argc<1 ) return;
if( (argc&1)==0 ) {
jsonWrongNumArgs(ctx, "replace");
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
assert( x.nNode );
for(i=1; i<(u32)argc; i+=2){
zPath = (const char*)sqlite3_value_text(argv[i]);
pNode = jsonLookup(&x, zPath, 0, ctx);
if( x.nErr ) goto replace_err;
if( pNode ){
pNode->jnFlags |= (u8)JNODE_REPLACE;
pNode->iVal = (u8)(i+1);
}
}
if( x.aNode[0].jnFlags & JNODE_REPLACE ){
sqlite3_result_value(ctx, argv[x.aNode[0].iVal]);
}else{
jsonReturnJson(x.aNode, ctx, argv);
}
replace_err:
jsonParseReset(&x);
}
/*
** json_set(JSON, PATH, VALUE, ...)
................................................................................
if( argc<1 ) return;
if( (argc&1)==0 ) {
jsonWrongNumArgs(ctx, bIsSet ? "set" : "insert");
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
assert( x.nNode );
for(i=1; i<(u32)argc; i+=2){
zPath = (const char*)sqlite3_value_text(argv[i]);
bApnd = 0;
pNode = jsonLookup(&x, zPath, &bApnd, ctx);
if( x.oom ){
sqlite3_result_error_nomem(ctx);
goto jsonSetDone;
}else if( x.nErr ){
goto jsonSetDone;
}else if( pNode && (bApnd || bIsSet) ){
pNode->jnFlags |= (u8)JNODE_REPLACE;
pNode->iVal = (u8)(i+1);
}
}
if( x.aNode[0].jnFlags & JNODE_REPLACE ){
sqlite3_result_value(ctx, argv[x.aNode[0].iVal]);
}else{
jsonReturnJson(x.aNode, ctx, argv);
}
jsonSetDone:
jsonParseReset(&x);
}
/*
** json_type(JSON)
................................................................................
static void jsonTypeFunc(
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
const char *zPath;
JsonNode *pNode;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
assert( x.nNode );
if( argc==2 ){
zPath = (const char*)sqlite3_value_text(argv[1]);
pNode = jsonLookup(&x, zPath, 0, ctx);
}else{
pNode = x.aNode;
}
if( pNode ){
sqlite3_result_text(ctx, jsonType[pNode->eType], -1, SQLITE_STATIC);
}
jsonParseReset(&x);
}
/*
** json_valid(JSON)
**
................................................................................
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
int rc = 0;
UNUSED_PARAM(argc);
if( jsonParse(&x, 0, (const char*)sqlite3_value_text(argv[0]))==0 ){
rc = 1;
}
jsonParseReset(&x);
sqlite3_result_int(ctx, rc);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
UNUSED_PARAM(idxStr);
UNUSED_PARAM(argc);
jsonEachCursorReset(p);
if( idxNum==0 ) return SQLITE_OK;
z = (const char*)sqlite3_value_text(argv[0]);
if( z==0 ) return SQLITE_OK;
n = sqlite3_value_bytes(argv[0]);
p->zJson = sqlite3_malloc64( n+1 );
if( p->zJson==0 ) return SQLITE_NOMEM;
memcpy(p->zJson, z, (size_t)n+1);
if( jsonParse(&p->sParse, 0, p->zJson) ){
int rc = SQLITE_NOMEM;
if( p->sParse.oom==0 ){
................................................................................
}else if( p->bRecursive && jsonParseFindParents(&p->sParse) ){
jsonEachCursorReset(p);
return SQLITE_NOMEM;
}else{
JsonNode *pNode;
if( idxNum==3 ){
const char *zErr = 0;
zRoot = (const char*)sqlite3_value_text(argv[1]);
if( zRoot==0 ) return SQLITE_OK;
n = sqlite3_value_bytes(argv[1]);
p->zRoot = sqlite3_malloc64( n+1 );
if( p->zRoot==0 ) return SQLITE_NOMEM;
memcpy(p->zRoot, zRoot, (size_t)n+1);
if( zRoot[0]!='$' ){
zErr = zRoot;
}else{
pNode = jsonLookupStep(&p->sParse, 0, p->zRoot+1, 0, &zErr);
}
if( zErr ){
sqlite3_free(cur->pVtab->zErrMsg);
cur->pVtab->zErrMsg = jsonPathSyntaxError(zErr);
jsonEachCursorReset(p);
return cur->pVtab->zErrMsg ? SQLITE_ERROR : SQLITE_NOMEM;
}else if( pNode==0 ){
return SQLITE_OK;
}
................................................................................
}else{
p->i++;
}
}else{
p->iEnd = p->i+1;
}
}
return SQLITE_OK;
}
/* The methods of the json_each virtual table */
static sqlite3_module jsonEachModule = {
0, /* iVersion */
0, /* xCreate */
jsonEachConnect, /* xConnect */
|