glibc/stdlib/mbtowc.c
Ulrich Drepper 6455d2556c Update.
2002-03-13  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/ttyname.c: Comment out definition and
	use of __ttyname.

	* posix/regcomp.c (__re_error_msgid): Renamed from re_error_msgid.
	Define as hidden.
	(__re_error_msgid_idx): Renamed from re_error_msgid_idx.  Define as
	hidden.  Change all users of these variables.

	* posix/regex_internal.h (__re_error_msgid): Renamed from
	re_error_msgid.  Declare as hidden.
	(__re_error_msgid_idx): Renamed from re_error_msgid_idx.  Declare as
	hidden.

	* stdio-common/reg-printf.c (__printf_arginfo_table): Define as hidden.
	(__printf_function_table): Likewise.
	* stdio-common/printf-parse.h (__printf_arginfo_table): Declare as
	hidden.
	(__printf_function_table): Likewise.

	* nscd/nscd_proto.h: Declare __nss_not_use_nscd_passwd,
	__nss_not_use_nscd_group, and __nss_not_use_nscd_hosts as hidden.

	* nss/XXX-lookup.c (DATABASE_NAME_SYMBOL): Define as hidden.
	* nss/nsswitch.c: Declare _nss_*_database as hidden.

	* stdlib/wctomb.c (__no_r_state): Declare as hidden.
	* stdlib/mbtowc.c (__no_r_state): Define as hidden.
2002-03-13 08:59:47 +00:00

74 lines
2.3 KiB
C

/* Copyright (C) 1991, 1992, 1995-1999, 2002 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <gconv.h>
#include <wcsmbs/wcsmbsload.h>
/* Common state for all non-restartable conversion functions. */
mbstate_t __no_r_state attribute_hidden;
/* 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.
Attention: this function should NEVER be intentionally used.
The interface is completely stupid. The state is shared between
all conversion functions. You should use instead the restartable
version `mbrtowc'. */
int
mbtowc (wchar_t *pwc, const char *s, size_t n)
{
int result;
/* If S is NULL the function has to return null or not null
depending on the encoding having a state depending encoding or
not. */
if (s == NULL)
{
/* Make sure we use the correct value. */
update_conversion_ptrs ();
/* This is an extension in the Unix standard which does not directly
violate ISO C. */
memset (&__no_r_state, '\0', sizeof __no_r_state);
result = __wcsmbs_gconv_fcts.towc->__stateful;
}
else if (*s == '\0')
{
if (pwc != NULL)
*pwc = L'\0';
result = 0;
}
else
{
result = __mbrtowc (pwc, s, n, &__no_r_state);
/* The `mbrtowc' functions tell us more than we need. Fold the -1
and -2 result into -1. */
if (result < 0)
result = -1;
}
return result;
}