1e74101e4STim J. Robbins /*-
2*4d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause
3d915a14eSPedro F. Giffuni *
487275e43STim J. Robbins * Copyright (c) 2002-2004 Tim J. Robbins.
5e74101e4STim J. Robbins * All rights reserved.
6e74101e4STim J. Robbins *
73c87aa1dSDavid Chisnall * Copyright (c) 2011 The FreeBSD Foundation
85b5fa75aSEd Maste *
93c87aa1dSDavid Chisnall * Portions of this software were developed by David Chisnall
103c87aa1dSDavid Chisnall * under sponsorship from the FreeBSD Foundation.
113c87aa1dSDavid Chisnall *
12e74101e4STim J. Robbins * Redistribution and use in source and binary forms, with or without
13e74101e4STim J. Robbins * modification, are permitted provided that the following conditions
14e74101e4STim J. Robbins * are met:
15e74101e4STim J. Robbins * 1. Redistributions of source code must retain the above copyright
16e74101e4STim J. Robbins * notice, this list of conditions and the following disclaimer.
17e74101e4STim J. Robbins * 2. Redistributions in binary form must reproduce the above copyright
18e74101e4STim J. Robbins * notice, this list of conditions and the following disclaimer in the
19e74101e4STim J. Robbins * documentation and/or other materials provided with the distribution.
20e74101e4STim J. Robbins *
21e74101e4STim J. Robbins * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22e74101e4STim J. Robbins * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23e74101e4STim J. Robbins * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24e74101e4STim J. Robbins * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25e74101e4STim J. Robbins * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26e74101e4STim J. Robbins * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27e74101e4STim J. Robbins * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28e74101e4STim J. Robbins * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29e74101e4STim J. Robbins * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30e74101e4STim J. Robbins * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31e74101e4STim J. Robbins * SUCH DAMAGE.
32e74101e4STim J. Robbins */
33e74101e4STim J. Robbins
34e74101e4STim J. Robbins #include "namespace.h"
35e74101e4STim J. Robbins #include <errno.h>
36d8f77b45SStefan Farfeleder #include <limits.h>
37e74101e4STim J. Robbins #include <stdio.h>
3824990dfaSTim J. Robbins #include <stdlib.h>
39e74101e4STim J. Robbins #include <wchar.h>
40e74101e4STim J. Robbins #include "un-namespace.h"
41e74101e4STim J. Robbins #include "libc_private.h"
42e74101e4STim J. Robbins #include "local.h"
43f9ceea9bSTim J. Robbins #include "mblocal.h"
443c87aa1dSDavid Chisnall #include "xlocale_private.h"
45e74101e4STim J. Robbins
465f147b57STim J. Robbins /*
475f147b57STim J. Robbins * Non-MT-safe version.
485f147b57STim J. Robbins */
49e74101e4STim J. Robbins wint_t
__ungetwc(wint_t wc,FILE * fp,locale_t locale)503c87aa1dSDavid Chisnall __ungetwc(wint_t wc, FILE *fp, locale_t locale)
51e74101e4STim J. Robbins {
5224990dfaSTim J. Robbins char buf[MB_LEN_MAX];
5324990dfaSTim J. Robbins size_t len;
543c87aa1dSDavid Chisnall struct xlocale_ctype *l = XLOCALE_CTYPE(locale);
55e74101e4STim J. Robbins
5624990dfaSTim J. Robbins if (wc == WEOF)
575f147b57STim J. Robbins return (WEOF);
583c87aa1dSDavid Chisnall if ((len = l->__wcrtomb(buf, wc, &fp->_mbstate)) == (size_t)-1) {
596180233fSTim J. Robbins fp->_flags |= __SERR;
605f147b57STim J. Robbins return (WEOF);
616180233fSTim J. Robbins }
6224990dfaSTim J. Robbins while (len-- != 0)
6392603416STim J. Robbins if (__ungetc((unsigned char)buf[len], fp) == EOF)
645f147b57STim J. Robbins return (WEOF);
6524990dfaSTim J. Robbins
6624990dfaSTim J. Robbins return (wc);
675f147b57STim J. Robbins }
6892603416STim J. Robbins
695f147b57STim J. Robbins /*
705f147b57STim J. Robbins * MT-safe version.
715f147b57STim J. Robbins */
725f147b57STim J. Robbins wint_t
ungetwc_l(wint_t wc,FILE * fp,locale_t locale)733c87aa1dSDavid Chisnall ungetwc_l(wint_t wc, FILE *fp, locale_t locale)
745f147b57STim J. Robbins {
755f147b57STim J. Robbins wint_t r;
763c87aa1dSDavid Chisnall FIX_LOCALE(locale);
775f147b57STim J. Robbins
78fda0a14fSKonstantin Belousov FLOCKFILE_CANCELSAFE(fp);
795f147b57STim J. Robbins ORIENT(fp, 1);
803c87aa1dSDavid Chisnall r = __ungetwc(wc, fp, locale);
81fda0a14fSKonstantin Belousov FUNLOCKFILE_CANCELSAFE();
825f147b57STim J. Robbins
835f147b57STim J. Robbins return (r);
84e74101e4STim J. Robbins }
853c87aa1dSDavid Chisnall wint_t
ungetwc(wint_t wc,FILE * fp)863c87aa1dSDavid Chisnall ungetwc(wint_t wc, FILE *fp)
873c87aa1dSDavid Chisnall {
883c87aa1dSDavid Chisnall return ungetwc_l(wc, fp, __get_locale());
893c87aa1dSDavid Chisnall }
90