lib/wchar.in.h

   1 /* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
   2
   3    Copyright (C) 2007-2008 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 /* Written by Eric Blake.  */
  20
  21 /*
  22  * ISO C 99 <wchar.h> for platforms that have issues.
  23  * <http://www.opengroup.org/susv3xbd/wchar.h.html>
  24  *
  25  * For now, this just ensures proper prerequisite inclusion order and
  26  * the declaration of wcwidth().
  27  */
  28
  29 @PRAGMA_SYSTEM_HEADER@
  30
  31 #ifdef __need_mbstate_t
  32 /* Special invocation convention inside uClibc header files.  */
  33
  34 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
  35
  36 #else
  37 /* Normal invocation convention.  */
  38
  39 #ifndef _GL_WCHAR_H
  40
  41 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
  42    <wchar.h>.
  43    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
  44    included before <wchar.h>.  */
  45 #include <stddef.h>
  46 #include <stdio.h>
  47 #include <time.h>
  48
  49 /* Include the original <wchar.h> if it exists.
  50    Some builds of uClibc lack it.  */
  51 /* The include_next requires a split double-inclusion guard.  */
  52 #if @HAVE_WCHAR_H@
  53 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
  54 #endif
  55
  56 #ifndef _GL_WCHAR_H
  57 #define _GL_WCHAR_H
  58
  59 /* The definition of GL_LINK_WARNING is copied here.  */
  60
  61 #ifdef __cplusplus
  62 extern "C" {
  63 #endif
  64
  65
  66 /* Return the number of screen columns needed for WC.  */
  67 #if @GNULIB_WCWIDTH@
  68 # if @REPLACE_WCWIDTH@
  69 #  undef wcwidth
  70 #  define wcwidth rpl_wcwidth
  71 extern int wcwidth (wchar_t);
  72 # else
  73 #  if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
  74 /* wcwidth exists but is not declared.  */
  75 extern int wcwidth (int /* actually wchar_t */);
  76 #  endif
  77 # endif
  78 #elif defined GNULIB_POSIXCHECK
  79 # undef wcwidth
  80 # define wcwidth(w) \
  81     (GL_LINK_WARNING ("wcwidth is unportable - " \
  82                       "use gnulib module wcwidth for portability"), \
  83      wcwidth (w))
  84 #endif
  85
  86
  87 #ifdef __cplusplus
  88 }
  89 #endif
  90
  91 #endif /* _GL_WCHAR_H */
  92 #endif /* _GL_WCHAR_H */
  93 #endif