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
|
/* $Id: maybe_con_write.c 3547 2022-01-29 02:39:47Z bird $ */
/** @file
* maybe_con_write - Optimized console output on windows.
*/
/*
* Copyright (c) 2016-2018 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Alternatively, the content of this file may be used under the terms of the
* GPL version 2 or later, or LGPL version 2.1 or later.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "console.h"
#ifdef KBUILD_OS_WINDOWS
# include <windows.h>
#endif
#include <errno.h>
#ifdef _MSC_VER
# include <conio.h>
typedef unsigned int to_write_t;
#else
typedef size_t to_write_t;
#endif
/**
* Drop-in write replacement for optimizing console output on windows.
*
* @returns Number of bytes written, -1 + errno on failure.
* @param fd The file descript to write to.
* @param pvBuf What to write.
* @param cbToWrite How much to write.
*/
ssize_t maybe_con_write(int fd, void const *pvBuf, size_t cbToWrite)
{
ssize_t cbWritten;
#ifdef KBUILD_OS_WINDOWS
/*
* If it's a TTY, do our own conversion to wide char and
* call WriteConsoleW directly.
*/
if (cbToWrite > 0 && cbToWrite < INT_MAX / 2)
{
HANDLE hCon = (HANDLE)_get_osfhandle(fd);
if ( hCon != INVALID_HANDLE_VALUE
&& hCon != NULL)
{
if (is_console_handle((intptr_t)hCon))
{
wchar_t awcBuf[1024];
wchar_t *pawcBuf;
wchar_t *pawcBufFree = NULL;
size_t cwcBuf = cbToWrite * 2 + 16;
if (cwcBuf < sizeof(awcBuf) / sizeof(awcBuf[0]))
{
pawcBuf = awcBuf;
cwcBuf = sizeof(awcBuf) / sizeof(awcBuf[0]);
}
else
pawcBufFree = pawcBuf = (wchar_t *)malloc(cwcBuf * sizeof(wchar_t));
if (pawcBuf)
{
int cwcToWrite = MultiByteToWideChar(get_crt_codepage(), 0 /*dwFlags*/,
pvBuf, (int)cbToWrite,
pawcBuf, (int)(cwcBuf - 1));
if (cwcToWrite > 0)
{
int rc;
pawcBuf[cwcToWrite] = '\0';
/* Let the CRT do the rest. At least the Visual C++ 2010 CRT
sources indicates _cputws will do the right thing. */
rc = _cputws(pawcBuf);
if (pawcBufFree)
free(pawcBufFree);
if (rc >= 0)
return cbToWrite;
return -1;
}
free(pawcBufFree);
}
}
}
}
#endif
/*
* Semi regular write handling.
*/
cbWritten = write(fd, pvBuf, (to_write_t)cbToWrite);
if (cbWritten == (ssize_t)cbToWrite)
{ /* likely */ }
else if (cbWritten >= 0 || errno == EINTR)
{
if (cbWritten < 0)
cbWritten = 0;
while (cbWritten < (ssize_t)cbToWrite)
{
ssize_t cbThis = write(fd, (char *)pvBuf + cbWritten, (to_write_t)(cbToWrite - cbWritten));
if (cbThis >= 0)
cbWritten += cbThis;
else if (errno != EINTR)
return -1;
}
}
return cbWritten;
}
|
