glibc/wcsmbs/mbrtowc.c
Ulrich Drepper fab656f5a7 Update.
* include/sys/stat.h: Add prototypes for __lxstat_internal and
	__lxstat64_internal.  Add macros __lxstat and __lxstat64 if not
	NOT_IN_libc.
	* sysdeps/generic/lxstat.c: Use INTDEF for __lxstat.
	* sysdeps/mach/hurd/lxstat.c: Likewise.
	* sysdeps/unix/common/lxstat.c: Likewise.
	* sysdeps/unix/sysv/aix/lxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/lxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/lxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/ia64/lxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/lxstat.c: Likewise.
	* sysdeps/generic/lxstat64.c: Use INTDEF for __lxstat64.
	* sysdeps/mach/hurd/lxstat64.c: Likewise.
	* sysdeps/unix/sysv/aix/lxstat64.c: Likewise.
	* sysdeps/unix/sysv/linuxx/lxstat64.c: Likewise.

	* include/wchar.h: Declare __mbrtowc_internal and __mbrlen_internal
	prototypes.  Add __mbrlen and __mbrtowc macros.
	* wcsmbs/mbrlen.c: Use INTDEF for __mbrlen.
	* wcsmbs/mbrtowc.c: Use INTDEF for __mbrtowc.

	* include/unistd.h: Add prototype for __write_internal and add
	__libc_write macro is SHARED.
	* sysdeps/generic/write.c: Use INTDEF for __write.
	* sysdeps/mach/hurd/write.c: Likewise.
	* sysdeps/unix/sysv/aix/write.c: Likewise.
	* sysdeps/unix/syscalls.list: Add __libc_write alias.

	* assert/assert.c: Replace STR_N_SIZE with something usable in
	macro arguments.
	* assert/assert-perr.c: Likewise.
2002-04-15 05:35:10 +00:00

111 lines
3.2 KiB
C

/* Copyright (C) 1996,1997,1998,1999,2000,2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
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 <dlfcn.h>
#include <errno.h>
#include <gconv.h>
#include <wchar.h>
#include <wcsmbsload.h>
#include <assert.h>
#ifndef EILSEQ
# define EILSEQ EINVAL
#endif
#undef __mbrtowc
/* This is the private state used if PS is NULL. */
static mbstate_t state;
size_t
__mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
{
wchar_t buf[1];
struct __gconv_step_data data;
int status;
size_t result;
size_t dummy;
const unsigned char *inbuf;
char *outbuf = (char *) (pwc ?: buf);
/* Set information for this step. */
data.__invocation_counter = 0;
data.__internal_use = 1;
data.__flags = __GCONV_IS_LAST;
data.__statep = ps ?: &state;
data.__trans = NULL;
/* A first special case is if S is NULL. This means put PS in the
initial state. */
if (s == NULL)
{
outbuf = (char *) buf;
s = "";
n = 1;
}
/* Tell where we want the result. */
data.__outbuf = outbuf;
data.__outbufend = outbuf + sizeof (wchar_t);
/* Make sure we use the correct function. */
update_conversion_ptrs ();
/* Do a normal conversion. */
inbuf = (const unsigned char *) s;
status = DL_CALL_FCT (__wcsmbs_gconv_fcts.towc->__fct,
(__wcsmbs_gconv_fcts.towc, &data, &inbuf, inbuf + n,
NULL, &dummy, 0, 1));
/* There must not be any problems with the conversion but illegal input
characters. The output buffer must be large enough, otherwise the
definition of MB_CUR_MAX is not correct. All the other possible
errors also must not happen. */
assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_ILLEGAL_INPUT
|| status == __GCONV_INCOMPLETE_INPUT
|| status == __GCONV_FULL_OUTPUT);
if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
|| status == __GCONV_FULL_OUTPUT)
{
if (data.__outbuf != (unsigned char *) outbuf
&& *(wchar_t *) outbuf == L'\0')
{
/* The converted character is the NUL character. */
assert (__mbsinit (data.__statep));
result = 0;
}
else
result = inbuf - (const unsigned char *) s;
}
else if (status == __GCONV_INCOMPLETE_INPUT)
result = (size_t) -2;
else
{
result = (size_t) -1;
__set_errno (EILSEQ);
}
return result;
}
INTDEF(__mbrtowc)
weak_alias (__mbrtowc, mbrtowc)