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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* POSIX compatible FILE stream read function.
Copyright (C) 2008-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2011.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <stdio.h>
/* Replace these functions only if module 'nonblocking' is requested. */
#if GNULIB_NONBLOCKING
/* On native Windows platforms, when read() is called on a non-blocking pipe
with an empty buffer, ReadFile() fails with error GetLastError() =
ERROR_NO_DATA, and read() in consequence fails with error EINVAL. This
read() function is at the basis of the function which fills the buffer of
a FILE stream. */
# if defined _WIN32 && ! defined __CYGWIN__
# include <errno.h>
# include <io.h>
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
# if GNULIB_MSVC_NOTHROW
# include "msvc-nothrow.h"
# else
# include <io.h>
# endif
/* Don't assume that UNICODE is not defined. */
# undef GetNamedPipeHandleState
# define GetNamedPipeHandleState GetNamedPipeHandleStateA
# define CALL_WITH_ERRNO_FIX(RETTYPE, EXPRESSION, FAILED) \
if (ferror (stream)) \
return (EXPRESSION); \
else \
{ \
RETTYPE ret; \
SetLastError (0); \
ret = (EXPRESSION); \
if (FAILED) \
{ \
if (GetLastError () == ERROR_NO_DATA && ferror (stream)) \
{ \
int fd = fileno (stream); \
if (fd >= 0) \
{ \
HANDLE h = (HANDLE) _get_osfhandle (fd); \
if (GetFileType (h) == FILE_TYPE_PIPE) \
{ \
/* h is a pipe or socket. */ \
DWORD state; \
if (GetNamedPipeHandleState (h, &state, NULL, NULL, \
NULL, NULL, 0) \
&& (state & PIPE_NOWAIT) != 0) \
/* h is a pipe in non-blocking mode. \
Change errno from EINVAL to EAGAIN. */ \
errno = EAGAIN; \
} \
} \
} \
} \
return ret; \
}
/* Enable this function definition only if gnulib's <stdio.h> has prepared it.
Otherwise we get a function definition conflict with mingw64's <stdio.h>. */
# if GNULIB_SCANF
int
scanf (const char *format, ...)
{
int retval;
va_list args;
va_start (args, format);
retval = vfscanf (stdin, format, args);
va_end (args);
return retval;
}
# endif
/* Enable this function definition only if gnulib's <stdio.h> has prepared it.
Otherwise we get a function definition conflict with mingw64's <stdio.h>. */
# if GNULIB_FSCANF
int
fscanf (FILE *stream, const char *format, ...)
{
int retval;
va_list args;
va_start (args, format);
retval = vfscanf (stream, format, args);
va_end (args);
return retval;
}
# endif
/* Enable this function definition only if gnulib's <stdio.h> has prepared it.
Otherwise we get a function definition conflict with mingw64's <stdio.h>. */
# if GNULIB_VSCANF
int
vscanf (const char *format, va_list args)
{
return vfscanf (stdin, format, args);
}
# endif
/* Enable this function definition only if gnulib's <stdio.h> has prepared it.
Otherwise we get a function definition conflict with mingw64's <stdio.h>. */
# if GNULIB_VFSCANF
int
vfscanf (FILE *stream, const char *format, va_list args)
#undef vfscanf
{
CALL_WITH_ERRNO_FIX (int, vfscanf (stream, format, args), ret == EOF)
}
# endif
int
getchar (void)
{
return fgetc (stdin);
}
int
fgetc (FILE *stream)
#undef fgetc
{
CALL_WITH_ERRNO_FIX (int, fgetc (stream), ret == EOF)
}
char *
fgets (char *s, int n, FILE *stream)
#undef fgets
{
CALL_WITH_ERRNO_FIX (char *, fgets (s, n, stream), ret == NULL)
}
/* We intentionally don't bother to fix gets. */
size_t
fread (void *ptr, size_t s, size_t n, FILE *stream)
#undef fread
{
CALL_WITH_ERRNO_FIX (size_t, fread (ptr, s, n, stream), ret < n)
}
# endif
#endif
|
