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[glibc.git] / wcsmbs / wctob.c
blob8cbcbe41c3e12aae5037cfa05c255602b7b7e4d5
1 /* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <gconv.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <wchar.h>
24 #include <wcsmbsload.h>
27 int
28 wctob (c)
29 wint_t c;
31 char buf[MB_LEN_MAX];
32 struct gconv_step_data data;
33 wchar_t inbuf[1];
34 wchar_t *inptr = inbuf;
35 size_t dummy;
36 int status;
38 /* Tell where we want the result. */
39 data.outbuf = buf;
40 data.outbufend = buf + MB_LEN_MAX;
41 data.invocation_counter = 0;
42 data.internal_use = 1;
43 data.is_last = 1;
44 data.statep = &data.__state;
46 /* Make sure we start in the initial state. */
47 memset (&data.__state, '\0', sizeof (mbstate_t));
49 /* Make sure we use the correct function. */
50 update_conversion_ptrs ();
52 /* Create the input string. */
53 inbuf[0] = c;
55 status = (*__wcsmbs_gconv_fcts.tomb->fct) (__wcsmbs_gconv_fcts.tomb, &data,
56 (const char **) &inptr,
57 (const char *) &inbuf[1],
58 &dummy, 0);
59 /* The conversion failed or the output is too long. */
60 if ((status != GCONV_OK && status != GCONV_FULL_OUTPUT
61 && status != GCONV_EMPTY_INPUT)
62 || data.outbuf != buf + 1)
63 return EOF;
65 return buf[0];