1 #include "str.h"

     2 

     3 unsigned int str_rchr(s,c)

     4 register char *s;

     5 int c;

     6 {

     7   register char ch;

     8   register char *t;

     9   register char *u;

    10 

    11   ch = c;

    12   t = s;

    13   u = 0;

    14   for (;;) {

    15     if (!*t) break; if (*t == ch) u = t; ++t;

    16     if (!*t) break; if (*t == ch) u = t; ++t;

    17     if (!*t) break; if (*t == ch) u = t; ++t;

    18     if (!*t) break; if (*t == ch) u = t; ++t;

    19   }

    20   if (!u) u = t;

    21   return u - s;

    22 }