Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/wcsmbs/mbrtowc.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
100 lines (85 sloc)
2.92 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Copyright (C) 1996, 1997, 1998, 1999 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 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., 59 Temple Place - Suite 330, | |
Boston, MA 02111-1307, USA. */ | |
#include <errno.h> | |
#include <gconv.h> | |
#include <wchar.h> | |
#include <wcsmbsload.h> | |
#include <assert.h> | |
#ifndef EILSEQ | |
# define EILSEQ EINVAL | |
#endif | |
/* 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 char *inbuf; | |
char *outbuf = (char *) (pwc ?: buf); | |
/* Tell where we want the result. */ | |
data.outbuf = outbuf; | |
data.outbufend = outbuf + sizeof (wchar_t); | |
data.invocation_counter = 0; | |
data.internal_use = 1; | |
data.is_last = 1; | |
data.statep = ps ?: &state; | |
/* A first special case is if S is NULL. This means put PS in the | |
initial state. */ | |
if (s == NULL) | |
{ | |
data.outbuf = (char *) buf; | |
s = ""; | |
n = 1; | |
} | |
/* Make sure we use the correct function. */ | |
update_conversion_ptrs (); | |
/* Do a normal conversion. */ | |
inbuf = s; | |
status = (*__wcsmbs_gconv_fcts.towc->fct) (__wcsmbs_gconv_fcts.towc, | |
&data, &inbuf, inbuf + n, | |
&dummy, 0); | |
/* 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 != outbuf && *(wchar_t *)outbuf == L'\0') | |
{ | |
/* The converted character is the NUL character. */ | |
assert (__mbsinit (data.statep)); | |
result = 0; | |
} | |
else | |
result = inbuf - s; | |
} | |
else | |
{ | |
result = status == GCONV_INCOMPLETE_INPUT ? (size_t) -2 : (size_t) -1; | |
__set_errno (EILSEQ); | |
} | |
return result; | |
} | |
weak_alias (__mbrtowc, mbrtowc) |