Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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  1. #include "byte.h"
  2. /* byte_rchr returns the largest integer i between 0 and len-1 inclusive
  3. * such that one[i] equals needle, or len if not found. */
  4. unsigned long byte_rchr(const void* haystack,unsigned long len,char needle) {
  5. register char c=needle;
  6. register const char* s=haystack;
  7. register const char* t=s+len;
  8. for (;;) {
  9. --t; if (s>=t) break; if (*t==c) break;
  10. --t; if (s>=t) break; if (*t==c) break;
  11. --t; if (s>=t) break; if (*t==c) break;
  12. --t; if (s>=t) break; if (*t==c) break;
  13. }
  14. return t-s;
  15. }