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Very minor optimizations in the unix VFS.

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FossilOrigin-Name: 6db3ff45bc15ece29cb2c7a736e5c6d005dde200
This commit is contained in:
drh
2015-09-01 23:51:53 +00:00
parent 59a5364cf9
commit 02bf8b45b7
3 changed files with 10 additions and 11 deletions
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7
src/os_unix.c
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@@ -3146,7 +3146,6 @@ static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
TIMER_START;
assert( cnt==(cnt&0x1ffff) );
assert( id->h>2 );
cnt &= 0x1ffff;
do{
#if defined(USE_PREAD)
got = osPread(id->h, pBuf, cnt, offset);
@@ -3363,8 +3362,8 @@ static int unixWrite(
}
}
#endif
while( amt>0 && (wrote = seekAndWrite(pFile, offset, pBuf, amt))>0 ){
while( (wrote = seekAndWrite(pFile, offset, pBuf, amt))<amt && wrote>0 ){
amt -= wrote;
offset += wrote;
pBuf = &((char*)pBuf)[wrote];
@@ -3372,7 +3371,7 @@ static int unixWrite(
SimulateIOError(( wrote=(-1), amt=1 ));
SimulateDiskfullError(( wrote=0, amt=1 ));
if( amt>0 ){
if( amt>wrote ){
if( wrote<0 && pFile->lastErrno!=ENOSPC ){
/* lastErrno set by seekAndWrite */
return SQLITE_IOERR_WRITE;