Import new gnulib.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
93cd84df63
commit
053cfcddf1
255 changed files with 12578 additions and 4948 deletions
199
grub-core/gnulib/mbswidth.c
Normal file
199
grub-core/gnulib/mbswidth.c
Normal file
|
|
@ -0,0 +1,199 @@
|
|||
/* Determine the number of screen columns needed for a string.
|
||||
Copyright (C) 2000-2013 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>
|
||||
|
||||
/* Get INT_MAX. */
|
||||
#include <limits.h>
|
||||
|
||||
/* 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. */
|
||||
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. */
|
||||
int
|
||||
mbsnwidth (const char *string, size_t nbytes, int flags)
|
||||
{
|
||||
const char *p = string;
|
||||
const char *plimit = p + nbytes;
|
||||
int width;
|
||||
|
||||
width = 0;
|
||||
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;
|
||||
case '\0':
|
||||
if (flags & MBSW_STOP_AT_NUL)
|
||||
return width;
|
||||
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. */
|
||||
{
|
||||
if (w > INT_MAX - width)
|
||||
goto overflow;
|
||||
width += w;
|
||||
}
|
||||
else
|
||||
/* An unprintable multibyte character. */
|
||||
if (!(flags & MBSW_REJECT_UNPRINTABLE))
|
||||
{
|
||||
if (!iswcntrl (wc))
|
||||
{
|
||||
if (width == INT_MAX)
|
||||
goto overflow;
|
||||
width++;
|
||||
}
|
||||
}
|
||||
else
|
||||
return -1;
|
||||
|
||||
p += bytes;
|
||||
}
|
||||
while (! mbsinit (&mbstate));
|
||||
}
|
||||
break;
|
||||
}
|
||||
return width;
|
||||
}
|
||||
|
||||
while (p < plimit)
|
||||
{
|
||||
unsigned char c = (unsigned char) *p++;
|
||||
|
||||
if (c == 0 && (flags & MBSW_STOP_AT_NUL))
|
||||
return width;
|
||||
|
||||
if (isprint (c))
|
||||
{
|
||||
if (width == INT_MAX)
|
||||
goto overflow;
|
||||
width++;
|
||||
}
|
||||
else if (!(flags & MBSW_REJECT_UNPRINTABLE))
|
||||
{
|
||||
if (!iscntrl (c))
|
||||
{
|
||||
if (width == INT_MAX)
|
||||
goto overflow;
|
||||
width++;
|
||||
}
|
||||
}
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
return width;
|
||||
|
||||
overflow:
|
||||
return INT_MAX;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue