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Diffstat (limited to 'lib/mbswidth.c')
| -rw-r--r-- | lib/mbswidth.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/lib/mbswidth.c b/lib/mbswidth.c deleted file mode 100644 index 072695172..000000000 --- a/lib/mbswidth.c +++ /dev/null @@ -1,194 +0,0 @@ -/* Determine the number of screen columns needed for a string. - Copyright (C) 2000-2006 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. */ - -/* Written by Bruno Haible <haible@clisp.cons.org>. */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -/* Specification. */ -#include "mbswidth.h" - -/* Get MB_CUR_MAX. */ -#include <stdlib.h> - -#include <string.h> - -/* Get isprint(). */ -#include <ctype.h> - -/* Get mbstate_t, mbrtowc(), mbsinit(). */ -#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 wcwidth(). */ -#include "wcwidth.h" - -/* Get iswcntrl(). */ -#if HAVE_WCTYPE_H -# include <wctype.h> -#endif -#if !defined iswcntrl && !HAVE_ISWCNTRL -# define iswcntrl(wc) (((wc) & ~0x1f) == 0 || (wc) == 0x7f) -#endif - -#ifndef mbsinit -# if !HAVE_MBSINIT -# define mbsinit(ps) 1 -# endif -#endif - -/* Returns the number of columns needed to represent the multibyte - character string pointed to by STRING. If a non-printable character - 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) -{ - return mbsnwidth (string, strlen (string), 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, 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) -{ - const char *p = string; - const char *plimit = p + nbytes; - int width; - - width = 0; -#if HAVE_MBRTOWC - if (MB_CUR_MAX > 1) - { - while (p < plimit) - switch (*p) - { - case ' ': case '!': case '"': case '#': case '%': - case '&': case '\'': case '(': case ')': case '*': - case '+': case ',': case '-': case '.': case '/': - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - case ':': case ';': case '<': case '=': case '>': - case '?': - case 'A': case 'B': case 'C': case 'D': case 'E': - case 'F': case 'G': case 'H': case 'I': case 'J': - case 'K': case 'L': case 'M': case 'N': case 'O': - case 'P': case 'Q': case 'R': case 'S': case 'T': - case 'U': case 'V': case 'W': case 'X': case 'Y': - case 'Z': - case '[': case '\\': case ']': case '^': case '_': - case 'a': case 'b': case 'c': case 'd': case 'e': - case 'f': case 'g': case 'h': case 'i': case 'j': - case 'k': case 'l': case 'm': case 'n': case 'o': - case 'p': case 'q': case 'r': case 's': case 't': - case 'u': case 'v': case 'w': case 'x': case 'y': - case 'z': case '{': case '|': case '}': case '~': - /* These characters are printable ASCII characters. */ - p++; - width++; - break; - default: - /* If we have a multibyte sequence, scan it up to its end. */ - { - mbstate_t mbstate; - memset (&mbstate, 0, sizeof mbstate); - do - { - wchar_t wc; - size_t bytes; - int w; - - bytes = mbrtowc (&wc, p, plimit - p, &mbstate); - - if (bytes == (size_t) -1) - /* An invalid multibyte sequence was encountered. */ - { - 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_REJECT_INVALID)) - { - p = plimit; - width++; - break; - } - else - return -1; - } - - if (bytes == 0) - /* A null wide character was encountered. */ - bytes = 1; - - w = wcwidth (wc); - if (w >= 0) - /* A printable multibyte character. */ - width += w; - else - /* An unprintable multibyte character. */ - if (!(flags & MBSW_REJECT_UNPRINTABLE)) - width += (iswcntrl (wc) ? 0 : 1); - else - return -1; - - p += bytes; - } - while (! mbsinit (&mbstate)); - } - break; - } - return width; - } -#endif - - while (p < plimit) - { - unsigned char c = (unsigned char) *p++; - - if (isprint (c)) - width++; - else if (!(flags & MBSW_REJECT_UNPRINTABLE)) - width += (iscntrl (c) ? 0 : 1); - else - return -1; - } - return width; -} |