1/* Copyright (C) 2005-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.org>.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdarg.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <wchar.h>
24#include <libioP.h>
25
26static int
27locked_vfxprintf (FILE *fp, const char *fmt, va_list ap,
28 unsigned int mode_flags)
29{
30 if (_IO_fwide (fp, 0) <= 0)
31 return __vfprintf_internal (fp, fmt, ap, mode_flags);
32
33 /* We must convert the narrow format string to a wide one.
34 Each byte can produce at most one wide character. */
35 wchar_t *wfmt;
36 mbstate_t mbstate;
37 int res;
38 int used_malloc = 0;
39 size_t len = strlen (fmt) + 1;
40
41 if (__glibc_unlikely (len > SIZE_MAX / sizeof (wchar_t)))
42 {
43 __set_errno (EOVERFLOW);
44 return -1;
45 }
46 if (__libc_use_alloca (len * sizeof (wchar_t)))
47 wfmt = alloca (len * sizeof (wchar_t));
48 else if ((wfmt = malloc (len * sizeof (wchar_t))) == NULL)
49 return -1;
50 else
51 used_malloc = 1;
52
53 memset (&mbstate, 0, sizeof mbstate);
54 res = __mbsrtowcs (wfmt, &fmt, len, &mbstate);
55
56 if (res != -1)
57 res = __vfwprintf_internal (fp, wfmt, ap, mode_flags);
58
59 if (used_malloc)
60 free (wfmt);
61
62 return res;
63}
64
65int
66__vfxprintf (FILE *fp, const char *fmt, va_list ap,
67 unsigned int mode_flags)
68{
69 if (fp == NULL)
70 fp = stderr;
71 _IO_flockfile (fp);
72 int res = locked_vfxprintf (fp, fmt, ap, mode_flags);
73 _IO_funlockfile (fp);
74 return res;
75}
76
77int
78__fxprintf (FILE *fp, const char *fmt, ...)
79{
80 va_list ap;
81 va_start (ap, fmt);
82 int res = __vfxprintf (fp, fmt, ap, 0);
83 va_end (ap);
84 return res;
85}
86
87int
88__fxprintf_nocancel (FILE *fp, const char *fmt, ...)
89{
90 if (fp == NULL)
91 fp = stderr;
92
93 va_list ap;
94 va_start (ap, fmt);
95 _IO_flockfile (fp);
96 int save_flags2 = fp->_flags2;
97 fp->_flags2 |= _IO_FLAGS2_NOTCANCEL;
98
99 int res = locked_vfxprintf (fp, fmt, ap, 0);
100
101 fp->_flags2 = save_flags2;
102 _IO_funlockfile (fp);
103 va_end (ap);
104 return res;
105}
106