203 lines
4.5 KiB
C++
203 lines
4.5 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
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#include "./except.hpp"
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#include "./debug.hpp"
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#include "./platform.hpp"
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#include <cstring>
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#include <cerrno>
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using util::errno_error;
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///////////////////////////////////////////////////////////////////////////////
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/// Construct an errno_error from a given error value. The error value MUST signal an error at
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/// construction time.
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errno_error::errno_error (int _code):
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runtime_error (strerror (_code)),
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m_code (_code)
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{
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CHECK_NEQ (_code, 0);
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}
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///----------------------------------------------------------------------------
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/// Construct an errno_error from the current value of errno. errno MUST signal an error at
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/// construction time.
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errno_error::errno_error ():
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errno_error (last_code ())
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{
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CHECK_NEQ (m_code, 0);
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}
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///////////////////////////////////////////////////////////////////////////////
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int
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errno_error::last_code (void)
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{
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return errno;
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}
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//-----------------------------------------------------------------------------
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int
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errno_error::code (void) const
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{
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return m_code;
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}
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///////////////////////////////////////////////////////////////////////////////
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/// Throw an errno_error exception if errno currently signals an error.
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void
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errno_error::try_code (void)
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{
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try_code (last_code ());
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}
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///----------------------------------------------------------------------------
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/// Throw an errno_error exception if 'code' represents an error.
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void
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errno_error::try_code (int code)
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{
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if (__builtin_expect (code != 0, false))
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throw errno_error(code);
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}
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///----------------------------------------------------------------------------
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void
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errno_error::throw_code (void)
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{
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throw_code (last_code ());
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}
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///----------------------------------------------------------------------------
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void
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errno_error::throw_code (int code)
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{
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CHECK_NEQ (code, 0);
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throw errno_error (code);
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}
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///////////////////////////////////////////////////////////////////////////////
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#if defined(PLATFORM_WIN32)
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using util::win32_error;
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//-----------------------------------------------------------------------------
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win32_error::win32_error (DWORD _code):
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runtime_error (code_string (_code)),
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m_code (_code)
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{
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CHECK_NEQ (m_code, (DWORD)ERROR_SUCCESS);
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}
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//-----------------------------------------------------------------------------
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win32_error::win32_error (void):
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win32_error (last_code ())
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{ ; }
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///////////////////////////////////////////////////////////////////////////////
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DWORD
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win32_error::code (void) const
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{
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return m_code;
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}
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//-----------------------------------------------------------------------------
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DWORD
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win32_error::last_code (void)
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{
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return GetLastError ();
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}
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///////////////////////////////////////////////////////////////////////////////
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void
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win32_error::try_code (void)
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{
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try_code (last_code ());
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}
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//-----------------------------------------------------------------------------
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void
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win32_error::try_code (DWORD id)
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{
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if (__builtin_expect (id != ERROR_SUCCESS, false))
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throw_code (id);
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}
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//-----------------------------------------------------------------------------
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void
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win32_error::throw_code (void)
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{
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throw_code (last_code ());
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}
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//-----------------------------------------------------------------------------
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void
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win32_error::throw_code (DWORD code)
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{
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CHECK_NEQ (code, (DWORD)ERROR_SUCCESS);
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throw win32_error (code);
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}
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//-----------------------------------------------------------------------------
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std::string
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win32_error::code_string (void)
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{
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return code_string (last_code ());
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}
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//-----------------------------------------------------------------------------
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std::string
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win32_error::code_string (DWORD code)
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{
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char message[256];
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auto res = FormatMessage (
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FORMAT_MESSAGE_FROM_SYSTEM,
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NULL,
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code,
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MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
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message,
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elems (message),
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NULL
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);
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if (res == 0) {
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win32_error::throw_code ();
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}
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return std::string (message, message + res);
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}
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#endif
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