Index: bison/src/bison/2.4.1/bison-2.4.1-src/lib/mbswidth.c |
=================================================================== |
--- bison/src/bison/2.4.1/bison-2.4.1-src/lib/mbswidth.c (revision 0) |
+++ bison/src/bison/2.4.1/bison-2.4.1-src/lib/mbswidth.c (revision 0) |
@@ -0,0 +1,175 @@ |
+/* Determine the number of screen columns needed for a string. |
+ Copyright (C) 2000-2007 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 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 |
+ 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, see <http://www.gnu.org/licenses/>. */ |
+ |
+/* Written by Bruno Haible <haible@clisp.cons.org>. */ |
+ |
+#include <config.h> |
+ |
+/* Specification. */ |
+#include "mbswidth.h" |
+ |
+/* Get MB_CUR_MAX. */ |
+#include <stdlib.h> |
+ |
+#include <string.h> |
+ |
+/* Get isprint(). */ |
+#include <ctype.h> |
+ |
+/* Get mbstate_t, mbrtowc(), mbsinit(), wcwidth(). */ |
+#include <wchar.h> |
+ |
+/* Get iswcntrl(). */ |
+#include <wctype.h> |
+ |
+#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; |
+} |
Property changes on: bison\src\bison\2.4.1\bison-2.4.1-src\lib\mbswidth.c |
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Added: svn:eol-style |
+ LF |