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Overview
| Comment: | The "apndvfs" VFS shim now appears to be working for both reads and writes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | appendvfs |
| Files: | files | file ages | folders |
| SHA3-256: |
7f7b72d83633922e2b5dbf0d3455d0fe |
| User & Date: | drh 2017-12-14 16:57:11 |
Context
|
2017-12-14
| ||
| 19:24 | Fixes to the appendvfs.c extension. Add the "sqltclsh" application that uses appendvfs.c to find its scripts. (check-in: ee248b52 user: drh tags: appendvfs) | |
| 16:57 | The "apndvfs" VFS shim now appears to be working for both reads and writes. (check-in: 7f7b72d8 user: drh tags: appendvfs) | |
| 16:28 | Add the ability to write to an appended database. This check-in compiles but is otherwise untested. (check-in: e343c63c user: drh tags: appendvfs) | |
Changes
Changes to ext/misc/appendvfs.c.
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 ... 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 ... 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 |
static int apndWriteMark(ApndFile *p, sqlite3_file *pFile){
int i;
unsigned char a[APND_MARK_SIZE];
memcpy(a, APND_MARK_PREFIX, APND_MARK_PREFIX_SZ);
for(i=0; i<8; i++){
a[APND_MARK_PREFIX_SZ+i] = (p->iPgOne >> (56 - i*8)) & 0xff;
}
return pFile->pMethods->xWrite(pFile, a, APND_MARK_PREFIX_SZ, p->iMark);
}
/*
** Write data to an apnd-file.
*/
static int apndWrite(
sqlite3_file *pFile,
................................................................................
}
/*
** Return the device characteristic flags supported by an apnd-file.
*/
static int apndDeviceCharacteristics(sqlite3_file *pFile){
pFile = ORIGFILE(pFile);
return SQLITE_IOCAP_IMMUTABLE |
pFile->pMethods->xDeviceCharacteristics(pFile);
}
/* Create a shared memory file mapping */
static int apndShmMap(
sqlite3_file *pFile,
int iPg,
int pgsz,
................................................................................
){
int rc = SQLITE_OK;
sqlite3_vfs *pOrig;
SQLITE_EXTENSION_INIT2(pApi);
pOrig = sqlite3_vfs_find(0);
apnd_vfs.iVersion = pOrig->iVersion;
apnd_vfs.pAppData = pOrig;
apnd_vfs.szOsFile = sizeof(ApndFile);
rc = sqlite3_vfs_register(&apnd_vfs, 0);
#ifdef APPENDVFS_TEST
if( rc==SQLITE_OK ){
rc = sqlite3_auto_extension((void(*)(void))apndvfsRegister);
}
#endif
if( rc==SQLITE_OK ) rc = SQLITE_OK_LOAD_PERMANENTLY;
return rc;
}
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208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 ... 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 ... 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 |
static int apndWriteMark(ApndFile *p, sqlite3_file *pFile){
int i;
unsigned char a[APND_MARK_SIZE];
memcpy(a, APND_MARK_PREFIX, APND_MARK_PREFIX_SZ);
for(i=0; i<8; i++){
a[APND_MARK_PREFIX_SZ+i] = (p->iPgOne >> (56 - i*8)) & 0xff;
}
return pFile->pMethods->xWrite(pFile, a, APND_MARK_SIZE, p->iMark);
}
/*
** Write data to an apnd-file.
*/
static int apndWrite(
sqlite3_file *pFile,
................................................................................
}
/*
** Return the device characteristic flags supported by an apnd-file.
*/
static int apndDeviceCharacteristics(sqlite3_file *pFile){
pFile = ORIGFILE(pFile);
return pFile->pMethods->xDeviceCharacteristics(pFile);
}
/* Create a shared memory file mapping */
static int apndShmMap(
sqlite3_file *pFile,
int iPg,
int pgsz,
................................................................................
){
int rc = SQLITE_OK;
sqlite3_vfs *pOrig;
SQLITE_EXTENSION_INIT2(pApi);
pOrig = sqlite3_vfs_find(0);
apnd_vfs.iVersion = pOrig->iVersion;
apnd_vfs.pAppData = pOrig;
apnd_vfs.szOsFile = pOrig->szOsFile + sizeof(ApndFile);
rc = sqlite3_vfs_register(&apnd_vfs, 0);
#ifdef APPENDVFS_TEST
if( rc==SQLITE_OK ){
rc = sqlite3_auto_extension((void(*)(void))apndvfsRegister);
}
#endif
if( rc==SQLITE_OK ) rc = SQLITE_OK_LOAD_PERMANENTLY;
return rc;
}
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