database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-14 00:22:38 +03:00
Code Activity

Faster version of sqlite3VdbeSerialGet. (CVS 1495)

Browse Source 
FossilOrigin-Name: 80985505fe8ba8e505842dae95d37bf412fc586d
This commit is contained in:
drh
2004-05-30 01:51:52 +00:00
parent 6fec076238
commit 696b32fa4e
3 changed files with 23 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
src/vdbeaux.c
View File

@@ -1172,18 +1172,6 @@ int sqlite3VdbeSerialTypeLen(u32 serial_type){
static u8 aSize[] = { 0, 1, 2, 4, 8, 8, 0, };
return aSize[serial_type];
}
#if 0
switch(serial_type){
case 6: return 0; /* NULL */
case 1: return 1; /* 1 byte integer */
case 2: return 2; /* 2 byte integer */
case 3: return 4; /* 4 byte integer */
case 4: return 8; /* 8 byte integer */
case 5: return 8; /* 8 byte float */
}
assert( serial_type>=12 );
return ((serial_type-12)>>1); /* text or blob */
#endif
}
/*
@@ -1237,24 +1225,12 @@ int sqlite3VdbeSerialGet(
){
int len;
len = sqlite3VdbeSerialTypeLen(serial_type);
assert( serial_type!=0 );
/* memset(pMem, 0, sizeof(pMem)); */
pMem->flags = 0;
pMem->z = 0;
/* NULL */
if( serial_type==6 ){
pMem->flags = MEM_Null;
pMem->type = SQLITE3_NULL;
return 0;
}
/* Integer and Real */
if( serial_type<=5 ){
/* Integer and Real */
u64 v = 0;
int n;
len = sqlite3VdbeSerialTypeLen(serial_type);
if( buf[0]&0x80 ){
v = -1;
@@ -1271,18 +1247,21 @@ int sqlite3VdbeSerialGet(
pMem->i = *(i64*)&v;
pMem->type = SQLITE3_INTEGER;
}
return len;
}
/* String or blob */
assert( serial_type>=12 );
len = sqlite3VdbeSerialTypeLen(serial_type);
pMem->z = (char *)buf;
pMem->n = len;
if( serial_type&0x01 ){
pMem->flags = MEM_Str | MEM_Ephem;
}else if( serial_type>=12 ){
/* String or blob */
pMem->z = (char *)buf;
pMem->n = len;
if( serial_type&0x01 ){
pMem->flags = MEM_Str | MEM_Ephem;
}else{
pMem->flags = MEM_Blob | MEM_Ephem;
}
}else{
pMem->flags = MEM_Blob | MEM_Ephem;
/* NULL */
assert( serial_type==6 );
assert( len==0 );
pMem->flags = MEM_Null;
pMem->type = SQLITE3_NULL;
}
return len;
}