/* Determine the number of screen columns needed for a character. Copyright (C) 2006 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef _gl_WCWIDTH_H #define _gl_WCWIDTH_H #if HAVE_WCHAR_T /* Get wcwidth if available, along with wchar_t. */ # if HAVE_WCHAR_H /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before <wchar.h>. BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before <wchar.h>. */ # include <stdio.h> # include <time.h> # include <wchar.h> # endif /* Get iswprint. */ # if HAVE_WCTYPE_H # include <wctype.h> # endif # if !defined iswprint && !HAVE_ISWPRINT static inline int iswprint (wint_t wc) { return (wc >= 0 && wc < 128 ? wc >= ' ' && wc <= '~' : 1); } # define iswprint iswprint # endif # ifndef HAVE_DECL_WCWIDTH "this configure-time declaration test was not run" # endif # ifndef wcwidth # if !HAVE_WCWIDTH /* wcwidth doesn't exist, so assume all printable characters have width 1. */ static inline int wcwidth (wchar_t wc) { return wc == 0 ? 0 : iswprint (wc) ? 1 : -1; } # elif !HAVE_DECL_WCWIDTH /* wcwidth exists but is not declared. */ extern # ifdef __cplusplus "C" # endif int wcwidth (int /* actually wchar_t */); # endif # endif #endif /* HAVE_WCHAR_H */ #endif /* _gl_WCWIDTH_H */