1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/* Copyright (C) 2005-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.org>.
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 <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <libioP.h>
/* See libio/fwprintf.c. */
static int
call_fwprintf (FILE *stream, unsigned int mode_flags,
const wchar_t *format, ...)
{
va_list arg;
va_start (arg, format);
int done = __vfwprintf_internal (stream, format, arg, mode_flags);
va_end (arg);
return done;
}
static int
locked_vfxprintf (FILE *fp, const char *fmt, va_list ap,
unsigned int mode_flags)
{
if (_IO_fwide (fp, 0) <= 0)
return __vfprintf_internal (fp, fmt, ap, mode_flags);
int saved_errno = errno;
/* Format the narrow string as a multibyte string. Try to use an
on-stack buffer first, to avoid the heap allocation. */
char buffer[512];
va_list ap1;
va_copy (ap1, ap);
int res = __vsnprintf_internal (buffer, sizeof (buffer),
fmt, ap1, mode_flags);
va_end (ap1);
if (res < 0)
return res;
char *ptr;
if (res < sizeof (buffer))
ptr = buffer;
else
{
/* Use a heap allocation for a large buffer. */
if (res == INT_MAX)
{
__set_errno (EOVERFLOW);
return -1;
}
size_t len = res + 1;
ptr = malloc (len);
if (ptr == NULL)
return -1;
__set_errno (saved_errno);
res = __vsnprintf_internal (ptr, len, fmt, ap, mode_flags);
if (res < 0)
return -1;
}
/* Write the formatted multibyte string to the wide stream. */
if (res >= 0)
res = call_fwprintf (fp, mode_flags, L"%s", ptr);
if (ptr != buffer)
free (ptr);
__set_errno (saved_errno);
return res;
}
int
__vfxprintf (FILE *fp, const char *fmt, va_list ap,
unsigned int mode_flags)
{
if (fp == NULL)
fp = stderr;
_IO_flockfile (fp);
int res = locked_vfxprintf (fp, fmt, ap, mode_flags);
_IO_funlockfile (fp);
return res;
}
int
__fxprintf (FILE *fp, const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
int res = __vfxprintf (fp, fmt, ap, 0);
va_end (ap);
return res;
}
int
__fxprintf_nocancel (FILE *fp, const char *fmt, ...)
{
if (fp == NULL)
fp = stderr;
va_list ap;
va_start (ap, fmt);
_IO_flockfile (fp);
int save_flags2 = fp->_flags2;
fp->_flags2 |= _IO_FLAGS2_NOTCANCEL;
int res = locked_vfxprintf (fp, fmt, ap, 0);
fp->_flags2 = save_flags2;
_IO_funlockfile (fp);
va_end (ap);
return res;
}
|
