/* Determine the number of screen columns needed for a string.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright (C) 2000-2008 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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.
+ the Free Software Foundation; either version 3 of the License, 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
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <haible@clisp.cons.org>. */
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
-/* Get MB_LEN_MAX. */
-#if HAVE_LIMITS_H
-# include <limits.h>
-#endif
+/* Specification. */
+#include "mbswidth.h"
/* Get MB_CUR_MAX. */
-#if HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
+#include <stdlib.h>
-#if HAVE_STRING_H
-# include <string.h>
-#endif
+#include <string.h>
/* Get isprint(). */
#include <ctype.h>
/* Get mbstate_t, mbrtowc(), mbsinit(), wcwidth(). */
-#if HAVE_WCHAR_H
-# include <wchar.h>
-#endif
-
-/* Get iswprint(). */
-#if HAVE_WCTYPE_H
-# include <wctype.h>
-#endif
-#if !defined iswprint && !HAVE_ISWPRINT
-# define iswprint(wc) 1
-#endif
-
-/* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */
-#if HAVE_MBRTOWC && defined mbstate_t
-# define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0)
-# define mbsinit(ps) 1
-#endif
-
-#ifndef HAVE_DECL_WCWIDTH
-"this configure-time declaration test was not run"
-#endif
-#if !HAVE_DECL_WCWIDTH
-int wcwidth ();
-#endif
-
-#ifndef wcwidth
-# if !HAVE_WCWIDTH
-/* wcwidth doesn't exist, so assume all printable characters have
- width 1. */
-# define wcwidth(wc) ((wc) == 0 ? 0 : iswprint (wc) ? 1 : -1)
-# endif
-#endif
-
-/* Get ISPRINT. */
-#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
-# define IN_CTYPE_DOMAIN(c) 1
-#else
-# define IN_CTYPE_DOMAIN(c) isascii(c)
-#endif
-/* Undefine to protect against the definition in wctype.h of solaris2.6. */
-#undef ISPRINT
-#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
+#include <wchar.h>
-#include "mbswidth.h"
+/* Get iswcntrl(). */
+#include <wctype.h>
/* Returns the number of columns needed to represent the multibyte
character string pointed to by STRING. If a non-printable character
- occurs, -1 is returned, unless MBSW_ACCEPT_UNPRINTABLE is specified.
- With flags = 0, this is the multibyte analogon of the wcswidth function. */
+ occurs, and MBSW_REJECT_UNPRINTABLE is specified, -1 is returned.
+ With flags = MBSW_REJECT_INVALID | MBSW_REJECT_UNPRINTABLE, this is
+ the multibyte analogue of the wcswidth function.
+ If STRING is not of length < INT_MAX / 2, integer overflow can occur. */
int
mbswidth (const char *string, int flags)
{
/* Returns the number of columns needed to represent the multibyte
character string pointed to by STRING of length NBYTES. If a
- non-printable character occurs, -1 is returned, unless
- MBSW_ACCEPT_UNPRINTABLE is specified. */
+ non-printable character occurs, and MBSW_REJECT_UNPRINTABLE is
+ specified, -1 is returned.
+ If NBYTES is not < INT_MAX / 2, integer overflow can occur. */
int
mbsnwidth (const char *string, size_t nbytes, int flags)
{
int width;
width = 0;
-#if HAVE_MBRTOWC && (MB_LEN_MAX > 1)
if (MB_CUR_MAX > 1)
{
while (p < plimit)
if (bytes == (size_t) -1)
/* An invalid multibyte sequence was encountered. */
{
- if (flags & MBSW_ACCEPT_INVALID)
- break;
+ if (!(flags & MBSW_REJECT_INVALID))
+ {
+ p++;
+ width++;
+ break;
+ }
else
return -1;
}
if (bytes == (size_t) -2)
/* An incomplete multibyte character at the end. */
{
- if (flags & MBSW_ACCEPT_INVALID)
- break;
+ if (!(flags & MBSW_REJECT_INVALID))
+ {
+ p = plimit;
+ width++;
+ break;
+ }
else
return -1;
}
width += w;
else
/* An unprintable multibyte character. */
- if (flags & MBSW_ACCEPT_UNPRINTABLE)
- width += 1;
+ if (!(flags & MBSW_REJECT_UNPRINTABLE))
+ width += (iswcntrl (wc) ? 0 : 1);
else
return -1;
}
return width;
}
-#endif
while (p < plimit)
{
unsigned char c = (unsigned char) *p++;
- if ((flags & MBSW_ACCEPT_UNPRINTABLE) || ISPRINT (c))
+ if (isprint (c))
width++;
+ else if (!(flags & MBSW_REJECT_UNPRINTABLE))
+ width += (iscntrl (c) ? 0 : 1);
else
return -1;
}
projects / gnulib.git / blobdiff