strncasecmp.c 1.9 KB

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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. #include <ctype.h>
  9. #include <locale.h>
  10. #ifdef WANT_WIDE
  11. # define strncasecmp wcsncasecmp
  12. # define strncasecmp_l wcsncasecmp_l
  13. # ifdef __UCLIBC_DO_XLOCALE
  14. libc_hidden_proto(towlower_l)
  15. # define TOLOWER(C) towlower_l((C), locale_arg)
  16. # else
  17. libc_hidden_proto(towlower)
  18. # define TOLOWER(C) towlower((C))
  19. # endif
  20. #else
  21. # ifdef __UCLIBC_DO_XLOCALE
  22. libc_hidden_proto(tolower_l)
  23. # define TOLOWER(C) tolower_l((C), locale_arg)
  24. # else
  25. #ifndef __UCLIBC_HAS_XLOCALE__
  26. libc_hidden_proto(__ctype_tolower)
  27. #endif
  28. libc_hidden_proto(tolower)
  29. # define TOLOWER(C) tolower((C))
  30. # endif
  31. #endif
  32. #if defined(__UCLIBC_HAS_XLOCALE__) && !defined(__UCLIBC_DO_XLOCALE)
  33. libc_hidden_proto(strncasecmp_l)
  34. libc_hidden_proto(strncasecmp)
  35. int strncasecmp(register const Wchar *s1, register const Wchar *s2, size_t n)
  36. {
  37. return strncasecmp_l(s1, s2, n, __UCLIBC_CURLOCALE);
  38. }
  39. libc_hidden_def(strncasecmp)
  40. #else /* defined(__UCLIBC_HAS_XLOCALE__) && !defined(__UCLIBC_DO_XLOCALE) */
  41. libc_hidden_proto(__XL_NPP(strncasecmp))
  42. int __XL_NPP(strncasecmp)(register const Wchar *s1, register const Wchar *s2,
  43. size_t n __LOCALE_PARAM )
  44. {
  45. #ifdef WANT_WIDE
  46. while (n && ((*s1 == *s2) || (TOLOWER(*s1) == TOLOWER(*s2)))) {
  47. if (!*s1++) {
  48. return 0;
  49. }
  50. ++s2;
  51. --n;
  52. }
  53. return (n == 0)
  54. ? 0
  55. : ((((Wuchar)TOLOWER(*s1)) < ((Wuchar)TOLOWER(*s2))) ? -1 : 1);
  56. /* TODO -- should wide cmp funcs do wchar or Wuchar compares? */
  57. #else
  58. int r = 0;
  59. while ( n
  60. && ((s1 == s2) ||
  61. !(r = ((int)( TOLOWER(*((unsigned char *)s1))))
  62. - TOLOWER(*((unsigned char *)s2))))
  63. && (--n, ++s2, *s1++));
  64. return r;
  65. #endif
  66. }
  67. libc_hidden_def(__XL_NPP(strncasecmp))
  68. #endif /* defined(__UCLIBC_HAS_XLOCALE__) && !defined(__UCLIBC_DO_XLOCALE) */