| 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
|
| ___________________________________________________________________
|
| Added: svn:eol-style
|
| + LF
|
|
|
|
|