mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include "../locale/localeinfo.h"
|
|
#include <ctype.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
|
|
long int _mb_shift = 0;
|
|
|
|
/* Convert the multibyte character at S, which is no longer
|
|
than N characters, to its `wchar_t' representation, placing
|
|
this n *PWC and returning its length. */
|
|
int
|
|
DEFUN(mbtowc, (pwc, s, n), wchar_t *pwc AND CONST char *s AND size_t n)
|
|
{
|
|
#if 0
|
|
register CONST mb_char *mb;
|
|
register wchar_t i;
|
|
#endif
|
|
|
|
if (s == NULL)
|
|
return _mb_shift != 0;
|
|
|
|
if (*s == '\0')
|
|
/* ANSI 4.10.7.2, line 19. */
|
|
return 0;
|
|
|
|
if (isascii (*s))
|
|
{
|
|
/* A normal ASCII character translates to itself. */
|
|
if (pwc != NULL)
|
|
*pwc = (wchar_t) *s;
|
|
return 1;
|
|
}
|
|
|
|
#if 0
|
|
if (_ctype_info->mbchar == NULL ||
|
|
_ctype_info->mbchar->mb_chars == NULL)
|
|
return -1;
|
|
|
|
if (n > MB_CUR_MAX)
|
|
n = MB_CUR_MAX;
|
|
|
|
for (i = 0; i < WCHAR_MAX; ++i)
|
|
{
|
|
mb = &_ctype_info->mbchar->mb_chars[i];
|
|
/* EOF and NUL aren't MB chars. */
|
|
if (i == (wchar_t) EOF || i == (wchar_t) '\0')
|
|
continue;
|
|
/* Normal ASCII values can't start MB chars. */
|
|
else if (isascii(i))
|
|
continue;
|
|
else if (mb->string == NULL || mb->len == 0)
|
|
continue;
|
|
else if (mb->len > n)
|
|
continue;
|
|
else if (!strncmp(mb->string, s, mb->len))
|
|
{
|
|
_mb_shift += mb->shift;
|
|
if (pwc != NULL)
|
|
*pwc = i;
|
|
return mb->len;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return -1;
|
|
}
|