-
Notifications
You must be signed in to change notification settings - Fork 1
/
redirector.hh
95 lines (81 loc) · 3.63 KB
/
redirector.hh
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
// Copyright 2021, The xtest authors.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of The xtest authors. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef XTEST_TESTS_REDIRECTOR_HH_
#define XTEST_TESTS_REDIRECTOR_HH_
#include <unistd.h>
#include <cstdint>
#include <cstdio>
#define REDIRECTOR_BUFFER_SIZE 1024
namespace xtest {
namespace testing {
enum class RedirectorContextStream {
kStdout,
kStderr,
};
class RedirectorContext {
public:
// Construct a `RedirectorContext` instance for the given context stream.
//
// Filles `M_output_buffer_` variable with all `NULL` to over-write garbage
// values.
explicit RedirectorContext(const RedirectorContextStream& stream);
// Removes the file created for redirecting data from the standard streams.
~RedirectorContext();
// Replaces given standard stream with context buffer for later retrieval of
// data. This method is marked as `public` and meant to be used from the user
// code.
void ReplaceStreamWithContextBuffer();
// This method is used to restore the standard stream that was replaced by
// the context buffer. This method is marked as `public` and meant to be used
// from the user code.
void RestoreStream();
private:
// Replaces given standard stream with context buffer for later retrieval of
// data. This method is marked as `private` and meant to be used within the
// public methods. This is the internal of `ReplaceStreamWithContextBuffer`
// method; allowing us to replace the given standard stream with the context
// buffer i.e., `M_output_buffer_`.
void ReplaceStreamWithContextBuffer(FILE* stream);
// This method is used to restore the standard stream that was replaced by
// the context buffer. This method is marked as `private` and meant to be
// used within the public methods. This is the internal of `RestoreStream`
// method; allowing us to restore the standard streams at any point in our
// code.
void RestoreStream(FILE* stream);
private:
RedirectorContextStream M_stream_;
int32_t M_out_err_fd_;
public:
char M_output_buffer_[REDIRECTOR_BUFFER_SIZE];
const char* M_redirector_file_name_;
const char* M_redirector_file_open_mode_;
};
} // namespace testing
} // namespace xtest
#endif // XTEST_TESTS_REDIRECTOR_HH_