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Overview
| Comment: | Simplified OOM detection in the instr() SQL function. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
6d85eb5736781b43aa674d9544c7523b |
| User & Date: | drh 2017-03-16 14:28:52 |
Context
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2017-03-16
| ||
| 18:55 | If the user has not set it explicitly, set the "PRAGMA synchronous" setting to SQLITE_DEFAULT_SYNCHRONOUS when a database connection changes from wal to rollback journal mode. check-in: 5c604479 user: dan tags: trunk | |
| 18:14 | If the user has not set it explicitly, set the "PRAGMA synchronous" setting to SQLITE_DEFAULT_SYNCHRONOUS when a database connection changes from wal to rollback journal mode. check-in: 78030c0f user: dan tags: default-synchronous-fix | |
| 14:28 | Simplified OOM detection in the instr() SQL function. check-in: 6d85eb57 user: drh tags: trunk | |
| 13:30 | Fix an uninitialized variable reference in the text generator for "PRAGMA vdbe_trace=ON" output. Problem discovered by OSS-Fuzz. check-in: e3d48716 user: drh tags: trunk | |
Changes
Changes to src/func.c.
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nHaystack = sqlite3_value_bytes(argv[0]);
nNeedle = sqlite3_value_bytes(argv[1]);
if( nNeedle>0 ){
if( typeHaystack==SQLITE_BLOB && typeNeedle==SQLITE_BLOB ){
zHaystack = sqlite3_value_blob(argv[0]);
zNeedle = sqlite3_value_blob(argv[1]);
isText = 0;
/* The following condition may be true if the arguments passed to this
** function are values returned by zeroblob() or similar and an OOM
** occurs while expanding the blob value. */
if( zNeedle==0 || (nHaystack && zHaystack==0) ) return;
}else{
zHaystack = sqlite3_value_text(argv[0]);
zNeedle = sqlite3_value_text(argv[1]);
isText = 1;
if( zHaystack==0 || zNeedle==0 ) return;
}
while( nNeedle<=nHaystack && memcmp(zHaystack, zNeedle, nNeedle)!=0 ){
N++;
do{
nHaystack--;
zHaystack++;
}while( isText && (zHaystack[0]&0xc0)==0x80 );
}
|
< < < < < > |
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 |
nHaystack = sqlite3_value_bytes(argv[0]);
nNeedle = sqlite3_value_bytes(argv[1]);
if( nNeedle>0 ){
if( typeHaystack==SQLITE_BLOB && typeNeedle==SQLITE_BLOB ){
zHaystack = sqlite3_value_blob(argv[0]);
zNeedle = sqlite3_value_blob(argv[1]);
isText = 0;
}else{
zHaystack = sqlite3_value_text(argv[0]);
zNeedle = sqlite3_value_text(argv[1]);
isText = 1;
}
if( zNeedle==0 || (nHaystack && zHaystack==0) ) return;
while( nNeedle<=nHaystack && memcmp(zHaystack, zNeedle, nNeedle)!=0 ){
N++;
do{
nHaystack--;
zHaystack++;
}while( isText && (zHaystack[0]&0xc0)==0x80 );
}
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