last_char_is.c 550 B

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * busybox library eXtended function
  4. *
  5. * Copyright (C) 2001 Larry Doolittle, <ldoolitt@recycle.lbl.gov>
  6. *
  7. * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  8. */
  9. #include "libbb.h"
  10. /* Find out if the last character of a string matches the one given.
  11. * Don't underrun the buffer if the string length is 0.
  12. */
  13. char* FAST_FUNC last_char_is(const char *s, int c)
  14. {
  15. if (s && *s) {
  16. size_t sz = strlen(s) - 1;
  17. s += sz;
  18. if ( (unsigned char)*s == c)
  19. return (char*)s;
  20. }
  21. return NULL;
  22. }