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Simplify the code by removing the unsupported and undocumented

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SQLITE_HAS_CODEC compile-time option

FossilOrigin-Name: 5a877221ce90e7523059353a68650c5fdd28ed032807afc2f10afbfbf864bdfe
This commit is contained in:
drh
2020-02-07 01:12:53 +00:00
parent c84ad31851
commit b48c0d59fa
23 changed files with 85 additions and 628 deletions
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155
src/pager.c
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@@ -406,20 +406,6 @@ int sqlite3PagerTrace=1; /* True to enable tracing */
*/
#define UNKNOWN_LOCK (EXCLUSIVE_LOCK+1)
/*
** A macro used for invoking the codec if there is one
*/
#ifdef SQLITE_HAS_CODEC
# define CODEC1(P,D,N,X,E) \
if( P->xCodec && P->xCodec(P->pCodec,D,N,X)==0 ){ E; }
# define CODEC2(P,D,N,X,E,O) \
if( P->xCodec==0 ){ O=(char*)D; }else \
if( (O=(char*)(P->xCodec(P->pCodec,D,N,X)))==0 ){ E; }
#else
# define CODEC1(P,D,N,X,E) /* NO-OP */
# define CODEC2(P,D,N,X,E,O) O=(char*)D
#endif
/*
** The maximum allowed sector size. 64KiB. If the xSectorsize() method
** returns a value larger than this, then MAX_SECTOR_SIZE is used instead.
@@ -705,12 +691,6 @@ struct Pager {
#endif
void (*xReiniter)(DbPage*); /* Call this routine when reloading pages */
int (*xGet)(Pager*,Pgno,DbPage**,int); /* Routine to fetch a patch */
#ifdef SQLITE_HAS_CODEC
void *(*xCodec)(void*,void*,Pgno,int); /* Routine for en/decoding data */
void (*xCodecSizeChng)(void*,int,int); /* Notify of page size changes */
void (*xCodecFree)(void*); /* Destructor for the codec */
void *pCodec; /* First argument to xCodec... methods */
#endif
char *pTmpSpace; /* Pager.pageSize bytes of space for tmp use */
PCache *pPCache; /* Pointer to page cache object */
#ifndef SQLITE_OMIT_WAL
@@ -837,9 +817,6 @@ static const unsigned char aJournalMagic[] = {
int sqlite3PagerDirectReadOk(Pager *pPager, Pgno pgno){
if( pPager->fd->pMethods==0 ) return 0;
if( sqlite3PCacheIsDirty(pPager->pPCache) ) return 0;
#ifdef SQLITE_HAS_CODEC
if( pPager->xCodec!=0 ) return 0;
#endif
#ifndef SQLITE_OMIT_WAL
if( pPager->pWal ){
u32 iRead = 0;
@@ -1073,11 +1050,7 @@ static void setGetterMethod(Pager *pPager){
if( pPager->errCode ){
pPager->xGet = getPageError;
#if SQLITE_MAX_MMAP_SIZE>0
}else if( USEFETCH(pPager)
#ifdef SQLITE_HAS_CODEC
&& pPager->xCodec==0
#endif
){
}else if( USEFETCH(pPager) ){
pPager->xGet = getPageMMap;
#endif /* SQLITE_MAX_MMAP_SIZE>0 */
}else{
@@ -2225,35 +2198,6 @@ static u32 pager_cksum(Pager *pPager, const u8 *aData){
return cksum;
}
/*
** Report the current page size and number of reserved bytes back
** to the codec.
*/
#ifdef SQLITE_HAS_CODEC
static void pagerReportSize(Pager *pPager){
if( pPager->xCodecSizeChng ){
pPager->xCodecSizeChng(pPager->pCodec, pPager->pageSize,
(int)pPager->nReserve);
}
}
#else
# define pagerReportSize(X) /* No-op if we do not support a codec */
#endif
#ifdef SQLITE_HAS_CODEC
/*
** Make sure the number of reserved bits is the same in the destination
** pager as it is in the source. This comes up when a VACUUM changes the
** number of reserved bits to the "optimal" amount.
*/
void sqlite3PagerAlignReserve(Pager *pDest, Pager *pSrc){
if( pDest->nReserve!=pSrc->nReserve ){
pDest->nReserve = pSrc->nReserve;
pagerReportSize(pDest);
}
}
#endif
/*
** Read a single page from either the journal file (if isMainJrnl==1) or
** from the sub-journal (if isMainJrnl==0) and playback that page.
@@ -2305,11 +2249,6 @@ static int pager_playback_one_page(
char *aData; /* Temporary storage for the page */
sqlite3_file *jfd; /* The file descriptor for the journal file */
int isSynced; /* True if journal page is synced */
#ifdef SQLITE_HAS_CODEC
/* The jrnlEnc flag is true if Journal pages should be passed through
** the codec. It is false for pure in-memory journals. */
const int jrnlEnc = (isMainJrnl || pPager->subjInMemory==0);
#endif
assert( (isMainJrnl&~1)==0 ); /* isMainJrnl is 0 or 1 */
assert( (isSavepnt&~1)==0 ); /* isSavepnt is 0 or 1 */
@@ -2372,7 +2311,6 @@ static int pager_playback_one_page(
*/
if( pgno==1 && pPager->nReserve!=((u8*)aData)[20] ){
pPager->nReserve = ((u8*)aData)[20];
pagerReportSize(pPager);
}
/* If the pager is in CACHEMOD state, then there must be a copy of this
@@ -2440,26 +2378,12 @@ static int pager_playback_one_page(
** is if the data was just read from an in-memory sub-journal. In that
** case it must be encrypted here before it is copied into the database
** file. */
#ifdef SQLITE_HAS_CODEC
if( !jrnlEnc ){
CODEC2(pPager, aData, pgno, 7, rc=SQLITE_NOMEM_BKPT, aData);
rc = sqlite3OsWrite(pPager->fd, (u8 *)aData, pPager->pageSize, ofst);
CODEC1(pPager, aData, pgno, 3, rc=SQLITE_NOMEM_BKPT);
}else
#endif
rc = sqlite3OsWrite(pPager->fd, (u8 *)aData, pPager->pageSize, ofst);
if( pgno>pPager->dbFileSize ){
pPager->dbFileSize = pgno;
}
if( pPager->pBackup ){
#ifdef SQLITE_HAS_CODEC
if( jrnlEnc ){
CODEC1(pPager, aData, pgno, 3, rc=SQLITE_NOMEM_BKPT);
sqlite3BackupUpdate(pPager->pBackup, pgno, (u8*)aData);
CODEC2(pPager, aData, pgno, 7, rc=SQLITE_NOMEM_BKPT,aData);
}else
#endif
sqlite3BackupUpdate(pPager->pBackup, pgno, (u8*)aData);
}
}else if( !isMainJrnl && pPg==0 ){
@@ -2510,11 +2434,6 @@ static int pager_playback_one_page(
if( pgno==1 ){
memcpy(&pPager->dbFileVers, &((u8*)pData)[24],sizeof(pPager->dbFileVers));
}
/* Decode the page just read from disk */
#if SQLITE_HAS_CODEC
if( jrnlEnc ){ CODEC1(pPager, pData, pPg->pgno, 3, rc=SQLITE_NOMEM_BKPT); }
#endif
sqlite3PcacheRelease(pPg);
}
return rc;
@@ -3074,8 +2993,6 @@ static int readDbPage(PgHdr *pPg){
memcpy(&pPager->dbFileVers, dbFileVers, sizeof(pPager->dbFileVers));
}
}
CODEC1(pPager, pPg->pData, pPg->pgno, 3, rc = SQLITE_NOMEM_BKPT);
PAGER_INCR(sqlite3_pager_readdb_count);
PAGER_INCR(pPager->nRead);
IOTRACE(("PGIN %p %d\n", pPager, pPg->pgno));
@@ -3819,7 +3736,6 @@ int sqlite3PagerSetPagesize(Pager *pPager, u32 *pPageSize, int nReserve){
if( nReserve<0 ) nReserve = pPager->nReserve;
assert( nReserve>=0 && nReserve<1000 );
pPager->nReserve = (i16)nReserve;
pagerReportSize(pPager);
pagerFixMaplimit(pPager);
}
return rc;
@@ -4215,11 +4131,6 @@ int sqlite3PagerClose(Pager *pPager, sqlite3 *db){
sqlite3OsClose(pPager->fd);
sqlite3PageFree(pTmp);
sqlite3PcacheClose(pPager->pPCache);
#ifdef SQLITE_HAS_CODEC
if( pPager->xCodecFree ) pPager->xCodecFree(pPager->pCodec);
#endif
assert( !pPager->aSavepoint && !pPager->pInJournal );
assert( !isOpen(pPager->jfd) && !isOpen(pPager->sjfd) );
@@ -4470,8 +4381,7 @@ static int pager_write_pagelist(Pager *pPager, PgHdr *pList){
assert( (pList->flags&PGHDR_NEED_SYNC)==0 );
if( pList->pgno==1 ) pager_write_changecounter(pList);
/* Encode the database */
CODEC2(pPager, pList->pData, pgno, 6, return SQLITE_NOMEM_BKPT, pData);
pData = pList->pData;
/* Write out the page data. */
rc = sqlite3OsWrite(pPager->fd, pData, pPager->pageSize, offset);
@@ -4560,12 +4470,6 @@ static int subjournalPage(PgHdr *pPg){
void *pData = pPg->pData;
i64 offset = (i64)pPager->nSubRec*(4+pPager->pageSize);
char *pData2;
#if SQLITE_HAS_CODEC
if( !pPager->subjInMemory ){
CODEC2(pPager, pData, pPg->pgno, 7, return SQLITE_NOMEM_BKPT, pData2);
}else
#endif
pData2 = pData;
PAGERTRACE(("STMT-JOURNAL %d page %d\n", PAGERID(pPager), pPg->pgno));
rc = write32bits(pPager->sjfd, offset, pPg->pgno);
@@ -5647,9 +5551,6 @@ static int getPageMMap(
);
assert( USEFETCH(pPager) );
#ifdef SQLITE_HAS_CODEC
assert( pPager->xCodec==0 );
#endif
/* Optimization note: Adding the "pgno<=1" term before "pgno==0" here
** allows the compiler optimizer to reuse the results of the "pgno>1"
@@ -5978,7 +5879,7 @@ static SQLITE_NOINLINE int pagerAddPageToRollbackJournal(PgHdr *pPg){
assert( pPg->pgno!=PAGER_MJ_PGNO(pPager) );
assert( pPager->journalHdr<=pPager->journalOff );
CODEC2(pPager, pPg->pData, pPg->pgno, 7, return SQLITE_NOMEM_BKPT, pData2);
pData2 = pPg->pData;
cksum = pager_cksum(pPager, (u8*)pData2);
/* Even if an IO or diskfull error occurs while journalling the
@@ -6343,7 +6244,7 @@ static int pager_incr_changecounter(Pager *pPager, int isDirectMode){
if( DIRECT_MODE ){
const void *zBuf;
assert( pPager->dbFileSize>0 );
CODEC2(pPager, pPgHdr->pData, 1, 6, rc=SQLITE_NOMEM_BKPT, zBuf);
zBuf = pPgHdr->pData;
if( rc==SQLITE_OK ){
rc = sqlite3OsWrite(pPager->fd, zBuf, pPager->pageSize, 0);
pPager->aStat[PAGER_STAT_WRITE]++;
@@ -7102,54 +7003,6 @@ const char *sqlite3PagerJournalname(Pager *pPager){
return pPager->zJournal;
}
#ifdef SQLITE_HAS_CODEC
/*
** Set or retrieve the codec for this pager
*/
void sqlite3PagerSetCodec(
Pager *pPager,
void *(*xCodec)(void*,void*,Pgno,int),
void (*xCodecSizeChng)(void*,int,int),
void (*xCodecFree)(void*),
void *pCodec
){
if( pPager->xCodecFree ){
pPager->xCodecFree(pPager->pCodec);
}else{
pager_reset(pPager);
}
pPager->xCodec = pPager->memDb ? 0 : xCodec;
pPager->xCodecSizeChng = xCodecSizeChng;
pPager->xCodecFree = xCodecFree;
pPager->pCodec = pCodec;
setGetterMethod(pPager);
pagerReportSize(pPager);
}
void *sqlite3PagerGetCodec(Pager *pPager){
return pPager->pCodec;
}
/*
** This function is called by the wal module when writing page content
** into the log file.
**
** This function returns a pointer to a buffer containing the encrypted
** page content. If a malloc fails, this function may return NULL.
*/
void *sqlite3PagerCodec(PgHdr *pPg){
void *aData = 0;
CODEC2(pPg->pPager, pPg->pData, pPg->pgno, 6, return 0, aData);
return aData;
}
/*
** Return the current pager state
*/
int sqlite3PagerState(Pager *pPager){
return pPager->eState;
}
#endif /* SQLITE_HAS_CODEC */
#ifndef SQLITE_OMIT_AUTOVACUUM
/*
** Move the page pPg to location pgno in the file.