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Overview
| Comment: | Change the json1.c module so that it throws an error if any of the JSON selector paths are malformed. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
3aa0855fd463076fc3277f1d9fe00d2f |
| User & Date: | drh 2015-08-29 00:54:49 |
Context
|
2015-08-29
| ||
| 16:02 | Do not consider an empty string to be valid JSON. Add some additional JSON test cases. check-in: fd19ff02 user: drh tags: trunk | |
| 00:54 | Change the json1.c module so that it throws an error if any of the JSON selector paths are malformed. check-in: 3aa0855f user: drh tags: trunk | |
|
2015-08-28
| ||
| 20:07 | Back out the json_check() routine. Instead, throw an error if the input to a json function (other than json_valid()) is not valid JSON. check-in: dc9ce7b1 user: drh tags: trunk | |
Changes
Changes to ext/misc/json1.c.
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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 */
u32 *aUp; /* Index of parent of each node */
u8 oom; /* Set to true if out of memory */
};
/**************************************************************************
** Utility routines for dealing with JsonString objects
**************************************************************************/
/* Set the JsonString object to an empty string
................................................................................
return SQLITE_NOMEM;
}
jsonParseFillInParentage(pParse, 0, 0);
return SQLITE_OK;
}
/* forward declaration */
static JsonNode *jsonLookupAppend(JsonParse*,const char*,int*);
/*
** Search along zPath to find the node specified. Return a pointer
** to that node, or NULL if zPath is malformed or if there is no such
** node.
**
** If pApnd!=0, then try to append new nodes to complete zPath if it is
** possible to do so and if no existing node corresponds to zPath. If
** new nodes are appended *pApnd is set to 1.
*/
static JsonNode *jsonLookup(
JsonParse *pParse, /* The JSON to search */
u32 iRoot, /* Begin the search at this node */
const char *zPath, /* The path to search */
int *pApnd /* Append nodes to complete path if not NULL */
){
u32 i, j, nKey;
const char *zKey;
JsonNode *pRoot = &pParse->aNode[iRoot];
if( zPath[0]==0 ) return pRoot;
if( zPath[0]=='.' ){
if( pRoot->eType!=JSON_OBJECT ) return 0;
................................................................................
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 ) return 0;
j = 1;
for(;;){
while( j<=pRoot->n ){
if( pRoot[j].n==nKey+2
&& strncmp(&pRoot[j].u.zJContent[1],zKey,nKey)==0
){
return jsonLookup(pParse, iRoot+j+1, &zPath[i], pApnd);
}
j++;
j += jsonNodeSize(&pRoot[j]);
}
if( (pRoot->jnFlags & JNODE_APPEND)==0 ) break;
iRoot += pRoot->u.iAppend;
pRoot = &pParse->aNode[iRoot];
................................................................................
}
if( pApnd ){
u32 iStart, iLabel;
JsonNode *pNode;
iStart = jsonParseAddNode(pParse, JSON_OBJECT, 2, 0);
iLabel = jsonParseAddNode(pParse, JSON_STRING, i, zPath);
zPath += i;
pNode = jsonLookupAppend(pParse, zPath, pApnd);
if( pParse->oom ) return 0;
if( pNode ){
pRoot = &pParse->aNode[iRoot];
pRoot->u.iAppend = iStart - iRoot;
pRoot->jnFlags |= JNODE_APPEND;
pParse->aNode[iLabel].jnFlags |= JNODE_RAW;
}
................................................................................
if( pRoot->eType!=JSON_ARRAY ) return 0;
i = 0;
zPath++;
while( isdigit(zPath[0]) ){
i = i*10 + zPath[0] - '0';
zPath++;
}
if( zPath[0]!=']' ) return 0;
zPath++;
j = 1;
for(;;){
while( j<=pRoot->n && (i>0 || (pRoot[j].jnFlags & JNODE_REMOVE)!=0) ){
if( (pRoot[j].jnFlags & JNODE_REMOVE)==0 ) i--;
j += jsonNodeSize(&pRoot[j]);
}
if( (pRoot->jnFlags & JNODE_APPEND)==0 ) break;
iRoot += pRoot->u.iAppend;
pRoot = &pParse->aNode[iRoot];
j = 1;
}
if( j<=pRoot->n ){
return jsonLookup(pParse, iRoot+j, zPath, pApnd);
}
if( i==0 && pApnd ){
u32 iStart;
JsonNode *pNode;
iStart = jsonParseAddNode(pParse, JSON_ARRAY, 1, 0);
pNode = jsonLookupAppend(pParse, zPath, pApnd);
if( pParse->oom ) return 0;
if( pNode ){
pRoot = &pParse->aNode[iRoot];
pRoot->u.iAppend = iStart - iRoot;
pRoot->jnFlags |= JNODE_APPEND;
}
return pNode;
}
}
return 0;
}
/*
** Append content to pParse that will complete zPath. Return a pointer
** to the inserted node, or return NULL if the append fails.
*/
static JsonNode *jsonLookupAppend(
JsonParse *pParse, /* Append content to the JSON parse */
const char *zPath, /* Description of content to append */
int *pApnd /* Set this flag to 1 */
){
*pApnd = 1;
if( zPath[0]==0 ){
jsonParseAddNode(pParse, JSON_NULL, 0, 0);
return pParse->oom ? 0 : &pParse->aNode[pParse->nNode-1];
}
if( zPath[0]=='.' ){
................................................................................
jsonParseAddNode(pParse, JSON_OBJECT, 0, 0);
}else if( strncmp(zPath,"[0]",3)==0 ){
jsonParseAddNode(pParse, JSON_ARRAY, 0, 0);
}else{
return 0;
}
if( pParse->oom ) return 0;
return jsonLookup(pParse, pParse->nNode-1, zPath, pApnd);
}
/*
** Report the wrong number of arguments for json_insert(), json_replace()
** or json_set().
*/
static void jsonWrongNumArgs(
sqlite3_context *pCtx,
................................................................................
const char *zFuncName
){
char *zMsg = sqlite3_mprintf("json_%s() needs an odd number of arguments",
zFuncName);
sqlite3_result_error(pCtx, zMsg, -1);
sqlite3_free(zMsg);
}
/****************************************************************************
** SQL functions used for testing and debugging
****************************************************************************/
#ifdef SQLITE_DEBUG
/*
................................................................................
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
sqlite3_int64 n = 0;
u32 i;
const char *zPath;
if( argc==2 ){
zPath = (const char*)sqlite3_value_text(argv[1]);
if( zPath==0 ) return;
if( zPath[0]!='$' ) return;
zPath++;
}else{
zPath = 0;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
JsonNode *pNode = x.aNode;
if( zPath ) pNode = jsonLookup(&x, 0, zPath, 0);
if( pNode->eType==JSON_ARRAY ){
assert( (pNode->jnFlags & JNODE_APPEND)==0 );
for(i=1; i<=pNode->n; n++){
i += jsonNodeSize(&pNode[i]);
}
}
}
jsonParseReset(&x);
sqlite3_result_int64(ctx, n);
}
/*
** json_extract(JSON, PATH)
**
** Return the element described by PATH. Return NULL if JSON is not
** valid JSON or if there is no PATH element or if PATH is malformed.
................................................................................
sqlite3_value **argv
){
JsonParse x; /* The parse */
JsonNode *pNode;
const char *zPath;
assert( argc==2 );
zPath = (const char*)sqlite3_value_text(argv[1]);
if( zPath==0 ) return;
if( zPath[0]!='$' ) return;
zPath++;
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
pNode = jsonLookup(&x, 0, zPath, 0);
if( pNode ){
jsonReturn(pNode, ctx, 0);
}
jsonParseReset(&x);
}
/*
................................................................................
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 ) continue;
if( zPath[0]!='$' ) continue;
pNode = jsonLookup(&x, 0, &zPath[1], 0);
if( pNode ) pNode->jnFlags |= JNODE_REMOVE;
}
if( (x.aNode[0].jnFlags & JNODE_REMOVE)==0 ){
jsonReturnJson(x.aNode, ctx, 0);
}
}
jsonParseReset(&x);
}
/*
** json_replace(JSON, PATH, VALUE, ...)
**
** Replace the value at PATH with VALUE. If PATH does not already exist,
................................................................................
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i+=2){
u8 jnFlags = JNODE_REPLACE;
zPath = (const char*)sqlite3_value_text(argv[i]);
if( zPath==0 ) continue;
if( zPath[0]!='$' ) continue;
if( zPath[1]=='$' ){
zPath++;
jnFlags = JNODE_REPLACE|JNODE_JSON;
}
pNode = jsonLookup(&x, 0, &zPath[1], 0);
if( pNode ){
pNode->jnFlags &= ~JNODE_JSON;
pNode->jnFlags |= jnFlags;
pNode->iVal = i+1;
}
}
if( x.aNode[0].jnFlags & JNODE_REPLACE ){
sqlite3_result_value(ctx, argv[x.aNode[0].iVal]);
}else{
jsonReturnJson(x.aNode, ctx, argv);
}
}
jsonParseReset(&x);
}
/*
** json_set(JSON, PATH, VALUE, ...)
**
** Set the value at PATH to VALUE. Create the PATH if it does not already
................................................................................
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i+=2){
u8 jnFlags = JNODE_REPLACE;
zPath = (const char*)sqlite3_value_text(argv[i]);
if( zPath==0 ) continue;
if( zPath[0]!='$' ) continue;
if( zPath[1]=='$' ){
zPath++;
jnFlags = JNODE_REPLACE|JNODE_JSON;
}
bApnd = 0;
pNode = jsonLookup(&x, 0, &zPath[1], &bApnd);
if( x.oom ){
sqlite3_result_error_nomem(ctx);
goto jsonSetDone;
}else if( pNode && (bApnd || bIsSet) ){
pNode->jnFlags &= ~JNODE_JSON;
pNode->jnFlags |= jnFlags;
pNode->iVal = i+1;
}
}
................................................................................
sqlite3_context *ctx,
int argc,
sqlite3_value **argv
){
JsonParse x; /* The parse */
const char *zPath;
if( argc==2 ){
zPath = (const char*)sqlite3_value_text(argv[1]);
if( zPath==0 ) return;
if( zPath[0]!='$' ) return;
zPath++;
}else{
zPath = 0;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
JsonNode *pNode = x.aNode;
if( zPath ) pNode = jsonLookup(&x, 0, zPath, 0);
if( pNode ){
sqlite3_result_text(ctx, jsonType[pNode->eType], -1, SQLITE_STATIC);
}
}
jsonParseReset(&x);
}
................................................................................
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 ){
zPath = (const char*)sqlite3_value_text(argv[1]);
if( zPath==0 || zPath[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)
|| (p->bRecursive && jsonParseFindParents(&p->sParse))
){
jsonEachCursorReset(p);
}else{
JsonNode *pNode;
if( idxNum==3 ){
p->bRecursive = 0;
n = sqlite3_value_bytes(argv[1]);
p->zPath = sqlite3_malloc64( n+1 );
if( p->zPath==0 ) return SQLITE_NOMEM;
memcpy(p->zPath, zPath, (size_t)n+1);
pNode = jsonLookup(&p->sParse, 0, p->zPath+1, 0);
if( pNode==0 ){
jsonEachCursorReset(p);
return SQLITE_OK;
}
}else{
pNode = p->sParse.aNode;
}
p->i = (int)(pNode - p->sParse.aNode);
p->eType = pNode->eType;
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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 */
u32 *aUp; /* Index of parent of each node */
u8 oom; /* Set to true if out of memory */
u8 nErr; /* Number of errors seen */
};
/**************************************************************************
** Utility routines for dealing with JsonString objects
**************************************************************************/
/* Set the JsonString object to an empty string
................................................................................
return SQLITE_NOMEM;
}
jsonParseFillInParentage(pParse, 0, 0);
return SQLITE_OK;
}
/* forward declaration */
static JsonNode *jsonLookupAppend(JsonParse*,const char*,int*,const char**);
/*
** Search along zPath to find the node specified. Return a pointer
** to that node, or NULL if zPath is malformed or if there is no such
** node.
**
** If pApnd!=0, then try to append new nodes to complete zPath if it is
** possible to do so and if no existing node corresponds to zPath. If
** new nodes are appended *pApnd is set to 1.
*/
static JsonNode *jsonLookupStep(
JsonParse *pParse, /* The JSON to search */
u32 iRoot, /* Begin the search at this node */
const char *zPath, /* The path to search */
int *pApnd, /* Append nodes to complete path if not NULL */
const char **pzErr /* Make *pzErr point to any syntax error in zPath */
){
u32 i, j, nKey;
const char *zKey;
JsonNode *pRoot = &pParse->aNode[iRoot];
if( zPath[0]==0 ) return pRoot;
if( zPath[0]=='.' ){
if( pRoot->eType!=JSON_OBJECT ) return 0;
................................................................................
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;
return 0;
}
j = 1;
for(;;){
while( j<=pRoot->n ){
if( pRoot[j].n==nKey+2
&& strncmp(&pRoot[j].u.zJContent[1],zKey,nKey)==0
){
return jsonLookupStep(pParse, iRoot+j+1, &zPath[i], pApnd, pzErr);
}
j++;
j += jsonNodeSize(&pRoot[j]);
}
if( (pRoot->jnFlags & JNODE_APPEND)==0 ) break;
iRoot += pRoot->u.iAppend;
pRoot = &pParse->aNode[iRoot];
................................................................................
}
if( pApnd ){
u32 iStart, iLabel;
JsonNode *pNode;
iStart = jsonParseAddNode(pParse, JSON_OBJECT, 2, 0);
iLabel = jsonParseAddNode(pParse, JSON_STRING, i, zPath);
zPath += i;
pNode = jsonLookupAppend(pParse, zPath, pApnd, pzErr);
if( pParse->oom ) return 0;
if( pNode ){
pRoot = &pParse->aNode[iRoot];
pRoot->u.iAppend = iStart - iRoot;
pRoot->jnFlags |= JNODE_APPEND;
pParse->aNode[iLabel].jnFlags |= JNODE_RAW;
}
................................................................................
if( pRoot->eType!=JSON_ARRAY ) return 0;
i = 0;
zPath++;
while( isdigit(zPath[0]) ){
i = i*10 + zPath[0] - '0';
zPath++;
}
if( zPath[0]!=']' ){
*pzErr = zPath;
return 0;
}
zPath++;
j = 1;
for(;;){
while( j<=pRoot->n && (i>0 || (pRoot[j].jnFlags & JNODE_REMOVE)!=0) ){
if( (pRoot[j].jnFlags & JNODE_REMOVE)==0 ) i--;
j += jsonNodeSize(&pRoot[j]);
}
if( (pRoot->jnFlags & JNODE_APPEND)==0 ) break;
iRoot += pRoot->u.iAppend;
pRoot = &pParse->aNode[iRoot];
j = 1;
}
if( j<=pRoot->n ){
return jsonLookupStep(pParse, iRoot+j, zPath, pApnd, pzErr);
}
if( i==0 && pApnd ){
u32 iStart;
JsonNode *pNode;
iStart = jsonParseAddNode(pParse, JSON_ARRAY, 1, 0);
pNode = jsonLookupAppend(pParse, zPath, pApnd, pzErr);
if( pParse->oom ) return 0;
if( pNode ){
pRoot = &pParse->aNode[iRoot];
pRoot->u.iAppend = iStart - iRoot;
pRoot->jnFlags |= JNODE_APPEND;
}
return pNode;
}
}else if( zPath[0]!=0 ){
*pzErr = zPath;
}
return 0;
}
/*
** Append content to pParse that will complete zPath. Return a pointer
** to the inserted node, or return NULL if the append fails.
*/
static JsonNode *jsonLookupAppend(
JsonParse *pParse, /* Append content to the JSON parse */
const char *zPath, /* Description of content to append */
int *pApnd, /* Set this flag to 1 */
const char **pzErr /* Make this point to any syntax error */
){
*pApnd = 1;
if( zPath[0]==0 ){
jsonParseAddNode(pParse, JSON_NULL, 0, 0);
return pParse->oom ? 0 : &pParse->aNode[pParse->nNode-1];
}
if( zPath[0]=='.' ){
................................................................................
jsonParseAddNode(pParse, JSON_OBJECT, 0, 0);
}else if( strncmp(zPath,"[0]",3)==0 ){
jsonParseAddNode(pParse, JSON_ARRAY, 0, 0);
}else{
return 0;
}
if( pParse->oom ) return 0;
return jsonLookupStep(pParse, pParse->nNode-1, zPath, pApnd, pzErr);
}
/*
** Return the text of a syntax error message on a JSON path. Space is
** obtained from sqlite3_malloc().
*/
static char *jsonPathSyntaxError(const char *zErr){
return sqlite3_mprintf("JSON path error near '%q'", zErr);
}
/*
** Do a node lookup using zPath. Return a pointer to the node on success.
** Return NULL if not found or if there is an error.
**
** On an error, write an error message into pCtx and increment the
** pParse->nErr counter.
**
** If pApnd!=NULL then try to append missing nodes and set *pApnd = 1 if
** nodes are appended.
**
** If the path starts with $$ then set *pFlags to JNODE_REPLACE|JNODE_JSON
** as a single to the caller that the input text to be inserted should be
** interpreted as JSON rather than as ordinary text.
*/
static JsonNode *jsonLookup(
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 */
u8 *pFlags /* Write JNODE_REPLACE or _REPLACE|_JSON here */
){
const char *zErr = 0;
JsonNode *pNode = 0;
u8 fg = JNODE_REPLACE;
if( zPath==0 ) return 0;
if( zPath[0]!='$' ){
zErr = zPath;
goto lookup_err;
}
zPath++;
if( zPath[0]=='$' ){
if( pFlags==0 ){
zErr = zPath;
goto lookup_err;
}
zPath++;
fg = JNODE_REPLACE|JNODE_JSON;
}
if( pFlags ) *pFlags = fg;
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);
}
}
if( pFlags ) *pFlags = fg;
return 0;
}
/*
** Report the wrong number of arguments for json_insert(), json_replace()
** or json_set().
*/
static void jsonWrongNumArgs(
sqlite3_context *pCtx,
................................................................................
const char *zFuncName
){
char *zMsg = sqlite3_mprintf("json_%s() needs an odd number of arguments",
zFuncName);
sqlite3_result_error(pCtx, zMsg, -1);
sqlite3_free(zMsg);
}
/****************************************************************************
** SQL functions used for testing and debugging
****************************************************************************/
#ifdef SQLITE_DEBUG
/*
................................................................................
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, 0);
}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);
}
/*
** json_extract(JSON, PATH)
**
** Return the element described by PATH. Return NULL if JSON is not
** valid JSON or if there is no PATH element or if PATH is malformed.
................................................................................
sqlite3_value **argv
){
JsonParse x; /* The parse */
JsonNode *pNode;
const char *zPath;
assert( argc==2 );
zPath = (const char*)sqlite3_value_text(argv[1]);
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
pNode = jsonLookup(&x, zPath, 0, ctx, 0);
if( pNode ){
jsonReturn(pNode, ctx, 0);
}
jsonParseReset(&x);
}
/*
................................................................................
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, 0);
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, ...)
**
** Replace the value at PATH with VALUE. If PATH does not already exist,
................................................................................
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i+=2){
u8 jnFlags = JNODE_REPLACE;
zPath = (const char*)sqlite3_value_text(argv[i]);
pNode = jsonLookup(&x, zPath, 0, ctx, &jnFlags);
if( x.nErr ) goto replace_err;
if( pNode ){
pNode->jnFlags &= ~JNODE_JSON;
pNode->jnFlags |= jnFlags;
pNode->iVal = 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, ...)
**
** Set the value at PATH to VALUE. Create the PATH if it does not already
................................................................................
return;
}
if( jsonParse(&x, ctx, (const char*)sqlite3_value_text(argv[0])) ) return;
if( x.nNode ){
for(i=1; i<(u32)argc; i+=2){
u8 jnFlags = JNODE_REPLACE;
zPath = (const char*)sqlite3_value_text(argv[i]);
bApnd = 0;
pNode = jsonLookup(&x, zPath, &bApnd, ctx, &jnFlags);
if( x.oom ){
sqlite3_result_error_nomem(ctx);
goto jsonSetDone;
}else if( x.nErr ){
goto jsonSetDone;
}else if( pNode && (bApnd || bIsSet) ){
pNode->jnFlags &= ~JNODE_JSON;
pNode->jnFlags |= jnFlags;
pNode->iVal = i+1;
}
}
................................................................................
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, 0);
}else{
pNode = x.aNode;
}
if( pNode ){
sqlite3_result_text(ctx, jsonType[pNode->eType], -1, SQLITE_STATIC);
}
}
jsonParseReset(&x);
}
................................................................................
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 ){
zPath = (const char*)sqlite3_value_text(argv[1]);
if( zPath==0 ) return SQLITE_OK;
if( zPath[0]!='$' ){
sqlite3_free(cur->pVtab->zErrMsg);
cur->pVtab->zErrMsg = jsonPathSyntaxError(zPath);
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 ){
sqlite3_free(cur->pVtab->zErrMsg);
cur->pVtab->zErrMsg = sqlite3_mprintf("malformed JSON");
if( cur->pVtab->zErrMsg ) rc = SQLITE_ERROR;
}
jsonEachCursorReset(p);
return rc;
}else if( p->bRecursive && jsonParseFindParents(&p->sParse) ){
jsonEachCursorReset(p);
return SQLITE_NOMEM;
}else{
JsonNode *pNode;
if( idxNum==3 ){
const char *zErr = 0;
p->bRecursive = 0;
n = sqlite3_value_bytes(argv[1]);
p->zPath = sqlite3_malloc64( n+1 );
if( p->zPath==0 ) return SQLITE_NOMEM;
memcpy(p->zPath, zPath, (size_t)n+1);
pNode = jsonLookupStep(&p->sParse, 0, p->zPath+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{
pNode = p->sParse.aNode;
}
p->i = (int)(pNode - p->sParse.aNode);
p->eType = pNode->eType;
|