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glibc/wcsmbs/wctob.c
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/* Copyright (C) 1996-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 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, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <dlfcn.h> | |
#include <gconv.h> | |
#include <stdio.h> | |
#include <string.h> | |
#include <wchar.h> | |
#include <wcsmbsload.h> | |
#include <sysdep.h> | |
int | |
wctob (wint_t c) | |
{ | |
unsigned char buf[MB_LEN_MAX]; | |
struct __gconv_step_data data; | |
wchar_t inbuf[1]; | |
wchar_t *inptr = inbuf; | |
size_t dummy; | |
int status; | |
const struct gconv_fcts *fcts; | |
if (c == WEOF) | |
return EOF; | |
/* We know that only ASCII compatible encodings are used for the | |
locale and that the wide character encoding is ISO 10646. */ | |
if (c >= L'\0' && c <= L'\x7f') | |
return (int) c; | |
/* Tell where we want the result. */ | |
data.__outbuf = buf; | |
data.__outbufend = buf + MB_LEN_MAX; | |
data.__invocation_counter = 0; | |
data.__internal_use = 1; | |
data.__flags = __GCONV_IS_LAST; | |
data.__statep = &data.__state; | |
/* Make sure we start in the initial state. */ | |
memset (&data.__state, '\0', sizeof (mbstate_t)); | |
/* Get the conversion functions. */ | |
fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); | |
/* Create the input string. */ | |
inbuf[0] = c; | |
const unsigned char *argptr = (const unsigned char *) inptr; | |
__gconv_fct fct = fcts->tomb->__fct; | |
#ifdef PTR_DEMANGLE | |
if (fcts->tomb->__shlib_handle != NULL) | |
PTR_DEMANGLE (fct); | |
#endif | |
status = DL_CALL_FCT (fct, | |
(fcts->tomb, &data, &argptr, | |
argptr + sizeof (inbuf[0]), NULL, &dummy, 0, 1)); | |
/* The conversion failed or the output is too long. */ | |
if ((status != __GCONV_OK && status != __GCONV_FULL_OUTPUT | |
&& status != __GCONV_EMPTY_INPUT) | |
|| data.__outbuf != (unsigned char *) (buf + 1)) | |
return EOF; | |
return buf[0]; | |
} |