1  // Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
 2  // Licensed under GPLv2 or any later version
 3  // Refer to the license.txt file included.
 4  
 5  #include <cstddef>
 6  #ifdef _WIN32
 7  #include <windows.h>
 8  #else
 9  #include <cerrno>
10  #include <cstring>
11  #endif
12  
13  #include "common/error.h"
14  
15  namespace Common {
16  
17  std::string NativeErrorToString(int e) {
18  #ifdef _WIN32
19      LPSTR err_str;
20  
21      DWORD res = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER |
22                                     FORMAT_MESSAGE_IGNORE_INSERTS,
23                                 nullptr, e, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
24                                 reinterpret_cast<LPSTR>(&err_str), 1, nullptr);
25      if (!res) {
26          return "(FormatMessageA failed to format error)";
27      }
28      std::string ret(err_str);
29      LocalFree(err_str);
30      return ret;
31  #else
32      char err_str[255];
33  #if defined(__GLIBC__) && (_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600)) ||   \
34      defined(ANDROID)
35      // Thread safe (GNU-specific)
36      const char* str = strerror_r(e, err_str, sizeof(err_str));
37      return std::string(str);
38  #else
39      // Thread safe (XSI-compliant)
40      int second_err = strerror_r(e, err_str, sizeof(err_str));
41      if (second_err != 0) {
42          return "(strerror_r failed to format error)";
43      }
44      return std::string(err_str);
45  #endif // GLIBC etc.
46  #endif // _WIN32
47  }
48  
49  std::string GetLastErrorMsg() {
50  #ifdef _WIN32
51      return NativeErrorToString(GetLastError());
52  #else
53      return NativeErrorToString(errno);
54  #endif
55  }
56  
57  } // namespace Common