lib/strings.in.h

   1 /* A substitute <strings.h>.
   2
   3    Copyright (C) 2007 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifndef _GL_STRINGS_H
  20
  21 /* The include_next requires a split double-inclusion guard.  */
  22 #@INCLUDE_NEXT@ @NEXT_STRINGS_H@
  23
  24 #ifndef _GL_STRINGS_H
  25 #define _GL_STRINGS_H
  26
  27
  28 /* The definition of GL_LINK_WARNING is copied here.  */
  29
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35
  36 /* Compare strings S1 and S2, ignoring case, returning less than, equal to or
  37    greater than zero if S1 is lexicographically less than, equal to or greater
  38    than S2.
  39    Note: This function does not work in multibyte locales.  */
  40 #if ! @HAVE_STRCASECMP@
  41 extern int strcasecmp (char const *s1, char const *s2);
  42 #endif
  43 #if defined GNULIB_POSIXCHECK
  44 /* strcasecmp() does not work with multibyte strings:
  45    POSIX says that it operates on "strings", and "string" in POSIX is defined
  46    as a sequence of bytes, not of characters.   */
  47 # undef strcasecmp
  48 # define strcasecmp(a,b) \
  49     (GL_LINK_WARNING ("strcasecmp cannot work correctly on character strings " \
  50                       "in multibyte locales - " \
  51                       "use mbscasecmp if you care about " \
  52                       "internationalization, or use c_strcasecmp (from " \
  53                       "gnulib module c-strcase) if you want a locale " \
  54                       "independent function"), \
  55      strcasecmp (a, b))
  56 #endif
  57
  58 /* Compare no more than N bytes of strings S1 and S2, ignoring case,
  59    returning less than, equal to or greater than zero if S1 is
  60    lexicographically less than, equal to or greater than S2.
  61    Note: This function cannot work correctly in multibyte locales.  */
  62 #if ! @HAVE_DECL_STRNCASECMP@
  63 extern int strncasecmp (char const *s1, char const *s2, size_t n);
  64 #endif
  65 #if defined GNULIB_POSIXCHECK
  66 /* strncasecmp() does not work with multibyte strings:
  67    POSIX says that it operates on "strings", and "string" in POSIX is defined
  68    as a sequence of bytes, not of characters.  */
  69 # undef strncasecmp
  70 # define strncasecmp(a,b,n) \
  71     (GL_LINK_WARNING ("strncasecmp cannot work correctly on character " \
  72                       "strings in multibyte locales - " \
  73                       "use mbsncasecmp or mbspcasecmp if you care about " \
  74                       "internationalization, or use c_strncasecmp (from " \
  75                       "gnulib module c-strcase) if you want a locale " \
  76                       "independent function"), \
  77      strncasecmp (a, b, n))
  78 #endif
  79
  80
  81 #ifdef __cplusplus
  82 }
  83 #endif
  84
  85 #endif /* _GL_STRING_H */
  86 #endif /* _GL_STRING_H */