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Overview
| Comment: | The BLOB returned by sqlite3VdbeMemFromBtree() does not need to be zero-terminated. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
e0af9a9040768adf8bba42a8780adeb6 |
| User & Date: | drh 2017-09-20 18:07:50 |
References
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2017-09-22
| ||
| 12:52 | Partial backout of check-in [e0af9a904076]. It turns out we do need some extra space at the end of the record blob as an overrun area to use when decoding a maliciously malformed record. check-in: 403b88a8 user: drh tags: trunk | |
Context
|
2017-09-22
| ||
| 12:52 | Partial backout of check-in [e0af9a904076]. It turns out we do need some extra space at the end of the record blob as an overrun area to use when decoding a maliciously malformed record. check-in: 403b88a8 user: drh tags: trunk | |
|
2017-09-20
| ||
| 18:47 | Size and performance optimization on sqlite3VdbeMemGrow(). check-in: 4b3f7eac user: drh tags: trunk | |
| 18:07 | The BLOB returned by sqlite3VdbeMemFromBtree() does not need to be zero-terminated. check-in: e0af9a90 user: drh tags: trunk | |
| 17:49 | Small size and performance optimization in the bytecode engine. check-in: 3b3e32d4 user: drh tags: trunk | |
Changes
Changes to src/vdbemem.c.
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 |
BtCursor *pCur, /* Cursor pointing at record to retrieve. */
u32 offset, /* Offset from the start of data to return bytes from. */
u32 amt, /* Number of bytes to return. */
Mem *pMem /* OUT: Return data in this Mem structure. */
){
int rc;
pMem->flags = MEM_Null;
if( SQLITE_OK==(rc = sqlite3VdbeMemClearAndResize(pMem, amt+2)) ){
rc = sqlite3BtreePayload(pCur, offset, amt, pMem->z);
if( rc==SQLITE_OK ){
pMem->z[amt] = 0;
pMem->z[amt+1] = 0;
pMem->flags = MEM_Blob|MEM_Term;
pMem->n = (int)amt;
}else{
sqlite3VdbeMemRelease(pMem);
}
}
return rc;
}
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| < < | |
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 |
BtCursor *pCur, /* Cursor pointing at record to retrieve. */
u32 offset, /* Offset from the start of data to return bytes from. */
u32 amt, /* Number of bytes to return. */
Mem *pMem /* OUT: Return data in this Mem structure. */
){
int rc;
pMem->flags = MEM_Null;
if( SQLITE_OK==(rc = sqlite3VdbeMemClearAndResize(pMem, amt)) ){
rc = sqlite3BtreePayload(pCur, offset, amt, pMem->z);
if( rc==SQLITE_OK ){
pMem->flags = MEM_Blob;
pMem->n = (int)amt;
}else{
sqlite3VdbeMemRelease(pMem);
}
}
return rc;
}
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