Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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20 lines
352 B

#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')
return c-'A'+10;
else if (c>='a' && c<='f')
return c-'a'+10;
return -1;
*/
}