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slight optimization

master
Felix von Leitner 14 years ago
parent
commit
fe4fef2e65
  1. 8
      scan/scan_fromhex.c

8
scan/scan_fromhex.c

@ -1,6 +1,13 @@
#include "scan.h"
int scan_fromhex(unsigned char c) {
c-='0';
if (c<=9) return c;
c&=~0x20;
c-='A'-'0';
if (c<6) return c+10;
return -1;
/* more readable but creates worse code:
if (c>='0' && c<='9')
return c-'0';
else if (c>='A' && c<='F')
@ -8,5 +15,6 @@ int scan_fromhex(unsigned char c) {
else if (c>='a' && c<='f')
return c-'a'+10;
return -1;
*/
}

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