sys/src/libventi/parsescore.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <venti.h>
   4
   5 int
   6 vtparsescore(char *s, char **prefix, uchar score[VtScoreSize])
   7 {
   8         int i, c;
   9         char *buf, *colon;
  10
  11         if((colon = strchr(s, ':')) != nil)
  12                 buf = colon+1;
  13         else
  14                 buf = s;
  15
  16         if(strlen(buf) != 2*VtScoreSize)
  17                 return -1;
  18
  19         memset(score, 0, VtScoreSize);
  20         for(i=0; i<2*VtScoreSize; i++){
  21                 if(buf[i] >= '0' && buf[i] <= '9')
  22                         c = buf[i] - '0';
  23                 else if(buf[i] >= 'a' && buf[i] <= 'z')
  24                         c = buf[i] - 'a' + 10;
  25                 else if(buf[i] >= 'A' && buf[i] <= 'Z')
  26                         c = buf[i] - 'A' + 10;
  27                 else
  28                         return -1;
  29
  30                 if((i & 1) == 0)
  31                         c <<= 4;
  32                 score[i>>1] |= c;
  33         }
  34         if(colon){
  35                 *colon = 0;
  36                 if(prefix)
  37                         *prefix = s;
  38         }else{
  39                 if(prefix)
  40                         *prefix = nil;
  41         }
  42         return 0;
  43 }