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str_chr.c (378B)

      1 /* Public domain. */
      2 
      3 #include "str.h"
      4 
      5 unsigned int str_chr(register const char *s,int c)
      6 {
      7   register char ch;
      8   register const char *t;
      9 
     10   ch = c;
     11   t = s;
     12   for (;;) {
     13     if (!*t) break; if (*t == ch) break; ++t;
     14     if (!*t) break; if (*t == ch) break; ++t;
     15     if (!*t) break; if (*t == ch) break; ++t;
     16     if (!*t) break; if (*t == ch) break; ++t;
     17   }
     18   return t - s;
     19 }