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Overview
| Comment: | Faster implementation of hexToInt that uses not branches. Ticket #3047. (CVS 4992) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
a70e9587569c99dd05e79c6745ff930a |
| User & Date: | drh 2008-04-11 19:37:56 |
Context
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2008-04-11
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| 21:20 | Add the speedtest8inst1.c program for running speed tests with an instrumented VFS. (CVS 4993) (check-in: baa8056c user: drh tags: trunk) | |
| 19:37 | Faster implementation of hexToInt that uses not branches. Ticket #3047. (CVS 4992) (check-in: a70e9587 user: drh tags: trunk) | |
| 19:18 | Avoid the use of uninitialized variables in sqlite3GenerateRowIndexDelete. Ticket #3048. (CVS 4991) (check-in: a93b7a34 user: drh tags: trunk) | |
Changes
Changes to src/util.c.
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** ************************************************************************* ** Utility functions used throughout sqlite. ** ** This file contains functions for allocating memory, comparing ** strings, and stuff like that. ** ** $Id: util.c,v 1.219 2008/04/05 18:41:43 drh Exp $ */ #include "sqliteInt.h" #include <stdarg.h> #include <ctype.h> /* ................................................................................ #if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC) /* ** Translate a single byte of Hex into an integer. ** This routinen only works if h really is a valid hexadecimal ** character: 0..9a..fA..F */ static int hexToInt(int h){ #if !defined(SQLITE_EBCDIC) int x = h - '0'; if( x>9 ){ x = (h - 'A' + 10) & 0xf; } assert( x>=0 && x<=15 ); return x; #else if( h>='0' && h<='9' ){ return h - '0'; }else if( h>='a' && h<='f' ){ return h - 'a' + 10; }else{ assert( h>='A' && h<='F' ); return h - 'A' + 10; } #endif } #endif /* !SQLITE_OMIT_BLOB_LITERAL || SQLITE_HAS_CODEC */ #if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC) /* ** Convert a BLOB literal of the form "x'hhhhhh'" into its binary ** value. Return a pointer to its binary value. Space to hold the |
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** ************************************************************************* ** Utility functions used throughout sqlite. ** ** This file contains functions for allocating memory, comparing ** strings, and stuff like that. ** ** $Id: util.c,v 1.220 2008/04/11 19:37:56 drh Exp $ */ #include "sqliteInt.h" #include <stdarg.h> #include <ctype.h> /* ................................................................................ #if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC) /* ** Translate a single byte of Hex into an integer. ** This routinen only works if h really is a valid hexadecimal ** character: 0..9a..fA..F */ static int hexToInt(int h){ assert( (h>='0' && h<='9') || (h>='a' && h<='f') || (h>='A' && h<='F') ); #if !defined(SQLITE_EBCDIC) h += 9*(1&(h>>6)); #else h += 9*(1&~(h>>4)); #endif return h & 0xf; } #endif /* !SQLITE_OMIT_BLOB_LITERAL || SQLITE_HAS_CODEC */ #if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC) /* ** Convert a BLOB literal of the form "x'hhhhhh'" into its binary ** value. Return a pointer to its binary value. Space to hold the |