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Improvements to the application-defined function mechanism so that it is

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more compact and runs faster, especially when the application defines
thousands of new SQL functions.

FossilOrigin-Name: 3201fbcc5105d23132e6b8b7ac825e66af4f8a39
This commit is contained in:
drh
2016-02-15 00:34:16 +00:00
parent e75a9eb9bb
commit 80738d9c3e
15 changed files with 189 additions and 182 deletions
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15
src/util.c
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@@ -256,16 +256,25 @@ void sqlite3TokenInit(Token *p, char *z){
** independence" that SQLite uses internally when comparing identifiers.
*/
int sqlite3_stricmp(const char *zLeft, const char *zRight){
register unsigned char *a, *b;
if( zLeft==0 ){
return zRight ? -1 : 0;
}else if( zRight==0 ){
return 1;
}
return sqlite3StrICmp(zLeft, zRight);
}
int sqlite3StrICmp(const char *zLeft, const char *zRight){
unsigned char *a, *b;
int c;
a = (unsigned char *)zLeft;
b = (unsigned char *)zRight;
while( *a!=0 && UpperToLower[*a]==UpperToLower[*b]){ a++; b++; }
return UpperToLower[*a] - UpperToLower[*b];
for(;;){
c = (int)UpperToLower[*a] - (int)UpperToLower[*b];
if( c || *a==0 ) break;
a++;
b++;
}
return c;
}
int sqlite3_strnicmp(const char *zLeft, const char *zRight, int N){
register unsigned char *a, *b;