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Faster decoding of 32-bit variable-length integers in cases were we do not

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need to know the number of bytes in the encoding.

FossilOrigin-Name: 59a31b16b54a0068c81ee65bc2fa905c2c826e98da3a7ffd8c3ea860a2827b4a
This commit is contained in:
drh
2020-01-28 20:27:42 +00:00
parent 925ab5c17e
commit 02a95eb9bb
5 changed files with 18 additions and 16 deletions
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8
src/vdbeaux.c
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@@ -4503,7 +4503,7 @@ int sqlite3VdbeRecordCompareWithSkip(
/* RHS is a string */
else if( pRhs->flags & MEM_Str ){
getVarint32(&aKey1[idx1], serial_type);
getVarint32NR(&aKey1[idx1], serial_type);
testcase( serial_type==12 );
if( serial_type<12 ){
rc = -1;
@@ -4537,7 +4537,7 @@ int sqlite3VdbeRecordCompareWithSkip(
/* RHS is a blob */
else if( pRhs->flags & MEM_Blob ){
assert( (pRhs->flags & MEM_Zero)==0 || pRhs->n==0 );
getVarint32(&aKey1[idx1], serial_type);
getVarint32NR(&aKey1[idx1], serial_type);
testcase( serial_type==12 );
if( serial_type<12 || (serial_type & 0x01) ){
rc = -1;
@@ -4856,7 +4856,7 @@ int sqlite3VdbeIdxRowid(sqlite3 *db, BtCursor *pCur, i64 *rowid){
}
/* The index entry must begin with a header size */
(void)getVarint32((u8*)m.z, szHdr);
getVarint32NR((u8*)m.z, szHdr);
testcase( szHdr==3 );
testcase( szHdr==m.n );
testcase( szHdr>0x7fffffff );
@@ -4867,7 +4867,7 @@ int sqlite3VdbeIdxRowid(sqlite3 *db, BtCursor *pCur, i64 *rowid){
/* The last field of the index should be an integer - the ROWID.
** Verify that the last entry really is an integer. */
(void)getVarint32((u8*)&m.z[szHdr-1], typeRowid);
getVarint32NR((u8*)&m.z[szHdr-1], typeRowid);
testcase( typeRowid==1 );
testcase( typeRowid==2 );
testcase( typeRowid==3 );