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//
// Error.cpp
//
// Library: Foundation
// Package: Core
// Module: Error
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Foundation.h"
#include "Poco/UnicodeConverter.h"
#include "Poco/Error.h"
#include <string>
#include <string.h>
#include <errno.h>
namespace Poco {
#ifdef POCO_OS_FAMILY_WINDOWS
DWORD Error::last()
{
return GetLastError();
}
std::string Error::getMessage(DWORD errorCode)
{
std::string errMsg;
DWORD dwFlg = FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS;
#if defined(POCO_WIN32_UTF8) && !defined(POCO_NO_WSTRING)
LPWSTR lpMsgBuf = 0;
if (FormatMessageW(dwFlg, 0, errorCode, 0, (LPWSTR) & lpMsgBuf, 0, NULL))
UnicodeConverter::toUTF8(lpMsgBuf, errMsg);
#else
LPTSTR lpMsgBuf = 0;
if (FormatMessageA(dwFlg, 0, errorCode, 0, (LPTSTR) & lpMsgBuf, 0, NULL))
errMsg = lpMsgBuf;
#endif
LocalFree(lpMsgBuf);
return errMsg;
}
#else
int Error::last()
{
return errno;
}
class StrErrorHelper
/// This little hack magically handles all variants
/// of strerror_r() (POSIX and GLIBC) and strerror().
{
public:
explicit StrErrorHelper(int err)
{
_buffer[0] = 0;
#if (_XOPEN_SOURCE >= 600) || POCO_OS == POCO_OS_ANDROID || __APPLE__
setMessage(strerror_r(err, _buffer, sizeof(_buffer)));
#elif _GNU_SOURCE
setMessage(strerror_r(err, _buffer, sizeof(_buffer)));
#else
setMessage(strerror(err));
#endif
}
~StrErrorHelper()
{
}
const std::string& message() const
{
return _message;
}
protected:
void setMessage(int rc)
/// Handles POSIX variant
{
_message = _buffer;
}
void setMessage(const char* msg)
/// Handles GLIBC variant
{
_message = msg;
}
private:
char _buffer[256];
std::string _message;
};
std::string Error::getMessage(int errorCode)
{
StrErrorHelper helper(errorCode);
return helper.message();
}
#endif
} // namespace Poco
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