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48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// Copyright 2009 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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// The code in GetErrorMessage can't handle some systems having the
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// GNU version of strerror_r and other systems having the XSI version,
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// so we undefine _GNU_SOURCE here in an attempt to always get the XSI version.
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// We include cstring before all other headers in case cstring is included
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// indirectly (without undefining _GNU_SOURCE) by some other header.
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#ifdef _GNU_SOURCE
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#undef _GNU_SOURCE
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#include <cstring>
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#define _GNU_SOURCE
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#else
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#include <cstring>
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#endif
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#include <cstddef>
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#include <errno.h>
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#include "Common/CommonFuncs.h"
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#ifdef _WIN32
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#include <windows.h>
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#endif
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// Generic function to get last error message.
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// Call directly after the command or use the error num.
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// This function might change the error code.
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std::string GetLastErrorMsg()
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{
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const size_t buff_size = 256;
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char err_str[buff_size];
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#ifdef _WIN32
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FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(),
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), err_str, buff_size, nullptr);
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#else
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// We assume that the XSI-compliant version of strerror_r (returns int) is used
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// rather than the GNU version (returns char*). The returned value is stored to
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// an int variable to get a compile-time check that the return type is not char*.
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const int result = strerror_r(errno, err_str, buff_size);
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if (result != 0)
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return "";
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#endif
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return std::string(err_str);
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}
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