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
|
// Copyright 2009 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license_dolphin.txt file included.
#include <cstddef>
#include <cstring>
#include <errno.h>
#include <type_traits>
#include "CommonFuncs.h"
#ifdef _WIN32
#include <windows.h>
#define strerror_r(err, buf, len) strerror_s(buf, len, err)
#endif
constexpr size_t BUFFER_SIZE = 256;
// Wrapper function to get last strerror(errno) string.
// This function might change the error code.
std::string LastStrerrorString()
{
char error_message[BUFFER_SIZE];
// There are two variants of strerror_r. The XSI version stores the message to the passed-in
// buffer and returns an int (0 on success). The GNU version returns a pointer to the message,
// which might have been stored in the passed-in buffer or might be a static string.
// We check defines in order to figure out variant is in use, and we store the returned value
// to a variable so that we'll get a compile-time check that our assumption was correct.
#if (defined(__GLIBC__) || __ANDROID_API__ >= 23) && \
(_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600))
const char* str = strerror_r(errno, error_message, BUFFER_SIZE);
return std::string(str);
#else
int error_code = strerror_r(errno, error_message, BUFFER_SIZE);
return error_code == 0 ? std::string(error_message) : "";
#endif
}
#ifdef _WIN32
// Wrapper function to get GetLastError() string.
// This function might change the error code.
std::string GetLastErrorString()
{
char error_message[BUFFER_SIZE];
FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), error_message, BUFFER_SIZE, nullptr);
return std::string(error_message);
}
#endif
|