strnlen.c 690 B

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  1. /*
  2. * Copyright (C) 2002 Manuel Novoa III
  3. * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
  4. *
  5. * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  6. */
  7. #include "_string.h"
  8. #ifdef __USE_GNU
  9. #ifdef WANT_WIDE
  10. # define Wstrnlen wcsnlen
  11. #else
  12. # define Wstrnlen strnlen
  13. #endif
  14. libc_hidden_proto(Wstrnlen)
  15. size_t Wstrnlen(const Wchar *s, size_t max)
  16. {
  17. register const Wchar *p = s;
  18. #ifdef __BCC__
  19. /* bcc can optimize the counter if it thinks it is a pointer... */
  20. register const char *maxp = (const char *) max;
  21. #else
  22. # define maxp max
  23. #endif
  24. while (maxp && *p) {
  25. ++p;
  26. --maxp;
  27. }
  28. return p - s;
  29. }
  30. #undef maxp
  31. libc_hidden_def(Wstrnlen)
  32. #endif