/*
** File control method. For custom operations on an tvfs-file.
*/
static int tvfsFileControl(sqlite3_file *pFile, int op, void *pArg){
TestvfsFd *p = tvfsGetFd(pFile);
if( op==SQLITE_FCNTL_PRAGMA ){
char **argv = (char**)pArg;
if( sqlite3_stricmp(argv[1],"error")==0 ){
int rc = SQLITE_ERROR;
if( argv[2] ){
const char *z = argv[2];
int x = atoi(z);
if( x ){
rc = x;
while( sqlite3Isdigit(z[0]) ){ z++; }
while( sqlite3Isspace(z[0]) ){ z++; }
}
if( z[0] ) argv[0] = sqlite3_mprintf("%s", z);
}
return rc;
}
if( sqlite3_stricmp(argv[1], "filename")==0 ){
argv[0] = sqlite3_mprintf("%s", p->zFilename);
return SQLITE_OK;
}
}
return sqlite3OsFileControl(p->pReal, op, pArg);
}
/*
** Invoke the xFileControl method on a particular database.
*/
EXPORT_C int sqlite3_file_control(sqlite3 *db, const char *zDbName, int op, void *pArg){
int rc = SQLITE_ERROR;
int iDb;
sqlite3_mutex_enter(db->mutex);
if( zDbName==0 ){
iDb = 0;
}else{
for(iDb=0; iDb<db->nDb; iDb++){
if( strcmp(db->aDb[iDb].zName, zDbName)==0 ) break;
}
}
if( iDb<db->nDb ){
Btree *pBtree = db->aDb[iDb].pBt;
if( pBtree ){
Pager *pPager;
sqlite3BtreeEnter(pBtree);
pPager = sqlite3BtreePager(pBtree);
if( pPager ){
sqlite3_file *fd = sqlite3PagerFile(pPager);
if( fd ){
rc = sqlite3OsFileControl(fd, op, pArg);
}
}
sqlite3BtreeLeave(pBtree);
}
}
sqlite3_mutex_leave(db->mutex);
return rc;
}
static int cfFileControl(sqlite3_file *pFile, int op, void *pArg){
if( op==SQLITE_FCNTL_SIZE_HINT ){
CrashFile *pCrash = (CrashFile *)pFile;
i64 nByte = *(i64 *)pArg;
if( nByte>pCrash->iSize ){
if( SQLITE_OK==writeListAppend(pFile, nByte, 0, 0) ){
pCrash->iSize = (int)nByte;
}
}
return SQLITE_OK;
}
return sqlite3OsFileControl(((CrashFile *)pFile)->pRealFile, op, pArg);
}
/*
** Populate the pCsr->iOffset and pCsr->szPage member variables. Based on
** the current value of pCsr->iPageno.
*/
static void statSizeAndOffset(StatCursor *pCsr){
StatTable *pTab = (StatTable *)((sqlite3_vtab_cursor *)pCsr)->pVtab;
Btree *pBt = pTab->db->aDb[pTab->iDb].pBt;
Pager *pPager = sqlite3BtreePager(pBt);
sqlite3_file *fd;
sqlite3_int64 x[2];
/* The default page size and offset */
pCsr->szPage = sqlite3BtreeGetPageSize(pBt);
pCsr->iOffset = (i64)pCsr->szPage * (pCsr->iPageno - 1);
/* If connected to a ZIPVFS backend, override the page size and
** offset with actual values obtained from ZIPVFS.
*/
fd = sqlite3PagerFile(pPager);
x[0] = pCsr->iPageno;
if( fd->pMethods!=0 && sqlite3OsFileControl(fd, 230440, &x)==SQLITE_OK ){
pCsr->iOffset = x[0];
pCsr->szPage = (int)x[1];
}
}
static int cfFileControl(sqlite3_file *pFile, int op, void *pArg){
return sqlite3OsFileControl(((CrashFile *)pFile)->pRealFile, op, pArg);
}
/*
** File control method. For custom operations on an devsym-file.
*/
static int devsymFileControl(sqlite3_file *pFile, int op, void *pArg){
devsym_file *p = (devsym_file *)pFile;
return sqlite3OsFileControl(p->pReal, op, pArg);
}
/*
** File control method. For custom operations on an jt-file.
*/
static int jtFileControl(sqlite3_file *pFile, int op, void *pArg){
jt_file *p = (jt_file *)pFile;
return sqlite3OsFileControl(p->pReal, op, pArg);
}
/*
** File control method. For custom operations on an tvfs-file.
*/
static int tvfsFileControl(sqlite3_file *pFile, int op, void *pArg){
TestvfsFd *p = tvfsGetFd(pFile);
return sqlite3OsFileControl(p->pReal, op, pArg);
}
