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/* Determine the number of screen columns needed for a string.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* Written by Bruno Haible <haible@clisp.cons.org>. */
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/* Get mbstate_t, mbrtowc(), mbsinit(), wcwidth(). */
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#if !defined iswprint && !HAVE_ISWPRINT
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# define iswprint(wc) 1
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#ifndef HAVE_DECL_WCWIDTH
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"this configure-time declaration test was not run"
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#if !HAVE_DECL_WCWIDTH
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/* wcwidth doesn't exist, so assume all printable characters have
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# define wcwidth(wc) ((wc) == 0 ? 0 : iswprint (wc) ? 1 : -1)
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#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
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# define IN_CTYPE_DOMAIN(c) 1
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# define IN_CTYPE_DOMAIN(c) isascii(c)
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/* Undefine to protect against the definition in wctype.h of solaris2.6. */
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#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
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/* Returns the number of columns needed to represent the multibyte
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character string pointed to by STRING. If a non-printable character
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occurs, -1 is returned, unless MBSW_ACCEPT_UNPRINTABLE is specified.
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With flags = 0, this is the multibyte analogon of the wcswidth function. */
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mbswidth (const char *string, int flags)
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return mbsnwidth (string, strlen (string), flags);
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/* Returns the number of columns needed to represent the multibyte
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character string pointed to by STRING of length NBYTES. If a
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non-printable character occurs, -1 is returned, unless
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MBSW_ACCEPT_UNPRINTABLE is specified. */
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mbsnwidth (const char *string, size_t nbytes, int flags)
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const char *p = string;
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const char *plimit = p + nbytes;
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#if HAVE_MBRTOWC && (MB_LEN_MAX > 1)
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case ' ': case '!': case '"': case '#': case '%':
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case '&': case '\'': case '(': case ')': case '*':
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case '+': case ',': case '-': case '.': case '/':
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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case ':': case ';': case '<': case '=': case '>':
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case 'A': case 'B': case 'C': case 'D': case 'E':
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case 'F': case 'G': case 'H': case 'I': case 'J':
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case 'K': case 'L': case 'M': case 'N': case 'O':
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case 'P': case 'Q': case 'R': case 'S': case 'T':
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case 'U': case 'V': case 'W': case 'X': case 'Y':
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case '[': case '\\': case ']': case '^': case '_':
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case 'a': case 'b': case 'c': case 'd': case 'e':
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case 'f': case 'g': case 'h': case 'i': case 'j':
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case 'k': case 'l': case 'm': case 'n': case 'o':
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case 'p': case 'q': case 'r': case 's': case 't':
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case 'u': case 'v': case 'w': case 'x': case 'y':
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case 'z': case '{': case '|': case '}': case '~':
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/* These characters are printable ASCII characters. */
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/* If we have a multibyte sequence, scan it up to its end. */
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memset (&mbstate, 0, sizeof mbstate);
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bytes = mbrtowc (&wc, p, plimit - p, &mbstate);
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if (bytes == (size_t) -1)
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/* An invalid multibyte sequence was encountered. */
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if (flags & MBSW_ACCEPT_INVALID)
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if (bytes == (size_t) -2)
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/* An incomplete multibyte character at the end. */
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if (flags & MBSW_ACCEPT_INVALID)
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/* A null wide character was encountered. */
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/* A printable multibyte character. */
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/* An unprintable multibyte character. */
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if (flags & MBSW_ACCEPT_UNPRINTABLE)
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while (! mbsinit (&mbstate));
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unsigned char c = (unsigned char) *p++;
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if ((flags & MBSW_ACCEPT_UNPRINTABLE) || ISPRINT (c))