win32platformutils.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 853 行 · 第 1/2 页

        return 0;

    return retVal;
}

FileHandle XMLPlatformUtils::openStdInHandle(MemoryManager* const manager)
{
    //
    //  Get the standard input handle. Duplicate it and return that copy
    //  since the outside world cannot tell the difference and will shut
    //  down this handle when its done with it. If we gave out the orignal,
    //  shutting it would prevent any further output.
    //
    HANDLE stdInOrg = ::GetStdHandle(STD_INPUT_HANDLE);
    if (stdInOrg == INVALID_HANDLE_VALUE) {
        XMLCh stdinStr[] = {chLatin_s, chLatin_t, chLatin_d, chLatin_i, chLatin_n, chNull};
        ThrowXMLwithMemMgr1(XMLPlatformUtilsException, XMLExcepts::File_CouldNotOpenFile, stdinStr, manager);
    }

    HANDLE retHandle;
    if (!::DuplicateHandle
    (
        ::GetCurrentProcess()
        , stdInOrg
        , ::GetCurrentProcess()
        , &retHandle
        , 0
        , FALSE
        , DUPLICATE_SAME_ACCESS))
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotDupHandle, manager);
    }
    return retHandle;
}


unsigned int
XMLPlatformUtils::readFileBuffer(       FileHandle      theFile
                                , const unsigned int    toRead
                                ,       XMLByte* const  toFill
                                , MemoryManager* const  manager)
{
    unsigned long bytesRead = 0;
    if (!::ReadFile(theFile, toFill, toRead, &bytesRead, 0))
    {
        //
        //  Check specially for a broken pipe error. If we get this, it just
        //  means no more data from the pipe, so return zero.
        //
        if (::GetLastError() != ERROR_BROKEN_PIPE)
            ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotReadFromFile, manager);
    }
    return (unsigned int)bytesRead;
}

void
XMLPlatformUtils::writeBufferToFile( FileHandle     const  theFile
                                   , long                  toWrite
                                   , const XMLByte* const  toFlush
                                   , MemoryManager* const  manager)
{
    if (!theFile        ||
        (toWrite <= 0 ) ||
        !toFlush         )
        return;

    const XMLByte* tmpFlush = (const XMLByte*) toFlush;
    unsigned long  bytesWritten = 0;

    while (true)
    {
        if (!::WriteFile(theFile, tmpFlush, toWrite, &bytesWritten, 0))
            ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotWriteToFile, manager);

        if (bytesWritten < (unsigned long) toWrite) //incomplete write
        {
            tmpFlush+=bytesWritten;
            toWrite-=bytesWritten;
            bytesWritten=0;
        }
        else
            return;
    }

    return;
}

void XMLPlatformUtils::resetFile(FileHandle theFile
                                 , MemoryManager* const manager)
{
    // Seek to the start of the file
    if (::SetFilePointer(theFile, 0, 0, FILE_BEGIN) == 0xFFFFFFFF)
        ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotResetFile, manager);

}


// ---------------------------------------------------------------------------
//  XMLPlatformUtils: File system methods
// ---------------------------------------------------------------------------
XMLCh* XMLPlatformUtils::getFullPath(const XMLCh* const srcPath,
                                     MemoryManager* const manager)
{
    //
    //  If we are on NT, then use wide character APIs, else use ASCII APIs.
    //  We have to do it manually since we are only built in ASCII mode from
    //  the standpoint of the APIs.
    //
    if (gOnNT)
    {
        // Use a local buffer that is big enough for the largest legal path
        const unsigned int bufSize = 1024;
        XMLCh tmpPath[bufSize + 1];

        XMLCh* namePart = 0;
        if (!::GetFullPathNameW((LPCWSTR)srcPath, bufSize, (LPWSTR)tmpPath, (LPWSTR*)&namePart))
            return 0;

        // Return a copy of the path
        return XMLString::replicate(tmpPath, manager);
    }
     else
    {
        // Transcode the incoming string
        char* tmpSrcPath = XMLString::transcode(srcPath, fgMemoryManager);
        ArrayJanitor<char> janSrcPath(tmpSrcPath, fgMemoryManager);

        // Use a local buffer that is big enough for the largest legal path
        const unsigned int bufSize = 511;
        char tmpPath[511 + 1];

        char* namePart = 0;
        if (!::GetFullPathNameA(tmpSrcPath, bufSize, tmpPath, &namePart))
            return 0;

        // Return a transcoded copy of the path
        return XMLString::transcode(tmpPath, manager);
    }
}

bool XMLPlatformUtils::isRelative(const XMLCh* const toCheck
                                  , MemoryManager* const manager)
{
    // Check for pathological case of empty path
    if (!toCheck[0])
        return false;

    //
    //  If its starts with a drive, then it cannot be relative. Note that
    //  we checked the drive not being empty above, so worst case its one
    //  char long and the check of the 1st char will fail because its really
    //  a null character.
    //
    if (toCheck[1] == chColon)
    {
        if (((toCheck[0] >= chLatin_A) && (toCheck[0] <= chLatin_Z))
        ||  ((toCheck[0] >= chLatin_a) && (toCheck[0] <= chLatin_z)))
        {
            return false;
        }
    }

    //
    //  If it starts with a double slash, then it cannot be relative since
    //  it's a remote file.
    //
    if (isBackSlash(toCheck[0]) && isBackSlash(toCheck[1]))
        return false;

    // Else assume its a relative path
    return true;
}

XMLCh* XMLPlatformUtils::getCurrentDirectory(MemoryManager* const manager)
{
    //
    //  If we are on NT, then use wide character APIs, else use ASCII APIs.
    //  We have to do it manually since we are only built in ASCII mode from
    //  the standpoint of the APIs.
    //
    if (gOnNT)
    {
        // Use a local buffer that is big enough for the largest legal path
        const unsigned int bufSize = 1024;
        XMLCh tmpPath[bufSize + 1];

        if (!::GetCurrentDirectoryW(bufSize, (LPWSTR)tmpPath))
            return 0;

        // Return a copy of the path
        return XMLString::replicate(tmpPath, manager);
    }
     else
    {
        // Use a local buffer that is big enough for the largest legal path
        const unsigned int bufSize = 511;
        char tmpPath[511 + 1];

        if (!::GetCurrentDirectoryA(bufSize, tmpPath))
            return 0;

        // Return a transcoded copy of the path
        return XMLString::transcode(tmpPath, manager);
    }
}

inline bool XMLPlatformUtils::isAnySlash(XMLCh c)
{
    return c == chBackSlash    ||
           c == chForwardSlash ||
           c == chYenSign      ||
           c == chWonSign;
}

// ---------------------------------------------------------------------------
//  XMLPlatformUtils: Timing Methods
// ---------------------------------------------------------------------------
unsigned long XMLPlatformUtils::getCurrentMillis()
{
    return (unsigned long)::GetTickCount();
}



// ---------------------------------------------------------------------------
//  Mutex methods
// ---------------------------------------------------------------------------
void XMLPlatformUtils::closeMutex(void* const mtxHandle)
{
    ::DeleteCriticalSection((LPCRITICAL_SECTION)mtxHandle);
    delete (CRITICAL_SECTION*)mtxHandle;
}


void XMLPlatformUtils::lockMutex(void* const mtxHandle)
{
    ::EnterCriticalSection((LPCRITICAL_SECTION)mtxHandle);
}


void* XMLPlatformUtils::makeMutex()
{
    CRITICAL_SECTION* newCS = new CRITICAL_SECTION;
    InitializeCriticalSection(newCS);
    return newCS;
}


void XMLPlatformUtils::unlockMutex(void* const mtxHandle)
{
    ::LeaveCriticalSection((LPCRITICAL_SECTION)mtxHandle);
}


// ---------------------------------------------------------------------------
//  Miscellaneous synchronization methods
// ---------------------------------------------------------------------------
void*
XMLPlatformUtils::compareAndSwap(       void**      toFill
                                , const void* const newValue
                                , const void* const toCompare)
{
#if defined WIN64
    return ::InterlockedCompareExchangePointer(toFill, (void*)newValue, (void*)toCompare);
#else

    //
    //  InterlockedCompareExchange is only supported on Windows 98,
    //  Windows NT 4.0, and newer -- not on Windows 95...
    //  If you are willing to give up Win95 support change this to #if 0
    //  otherwise we are back to using assembler.
    //  (But only if building with compilers that support inline assembler.)
    //
    #if (defined(_MSC_VER) || defined(__BCPLUSPLUS__)) && !defined(XERCES_NO_ASM)

    void*   result;
    __asm
    {
        mov             eax, toCompare;
        mov             ebx, newValue;
        mov             ecx, toFill
        lock cmpxchg    [ecx], ebx;
        mov             result, eax;
    }
    return result;

    #else

    //
    //  Note we have to cast off the constness of some of these because
    //  the system APIs are not C++ aware in all cases.
    //

    return (void*) ::InterlockedCompareExchange((LPLONG)toFill, (LONG)newValue, (LONG)toCompare);

    #endif

#endif

}


// ---------------------------------------------------------------------------
//  Atomic increment and decrement methods
// ---------------------------------------------------------------------------
int XMLPlatformUtils::atomicIncrement(int &location)
{
    return ::InterlockedIncrement(&(long &)location);
}


int XMLPlatformUtils::atomicDecrement(int &location)
{
    return ::InterlockedDecrement(&(long &)location);
}



// ---------------------------------------------------------------------------
//  XMLPlatformUtils: Private Static Methods
// ---------------------------------------------------------------------------

//
//  This method is called by the platform independent part of this class
//  during initialization. We have to create the type of net accessor that
//  we want to use. If none, then just return zero.
//
XMLNetAccessor* XMLPlatformUtils::makeNetAccessor()
{
#if defined (XML_USE_NETACCESSOR_LIBWWW)
    return new LibWWWNetAccessor();
#elif defined (XML_USE_NETACCESSOR_WINSOCK)
    return new WinSockNetAccessor();
#else
    return 0;
#endif
}


//
//  This method is called by the platform independent part of this class
//  when client code asks to have one of the supported message sets loaded.
//  In our case, we use the ICU based message loader mechanism.
//
XMLMsgLoader* XMLPlatformUtils::loadAMsgSet(const XMLCh* const msgDomain)
{
#if defined (XML_USE_INMEM_MESSAGELOADER)
    return new InMemMsgLoader(msgDomain);
#elif defined (XML_USE_WIN32_MSGLOADER)
    return new Win32MsgLoader(msgDomain);
#elif defined (XML_USE_ICU_MESSAGELOADER)
    return new ICUMsgLoader(msgDomain);
#else
    #error You must provide a message loader
#endif
}


//
//  This method is called very early in the bootstrapping process. This guy
//  must create a transcoding service and return it. It cannot use any string
//  methods, any transcoding services, throw any exceptions, etc... It just
//  makes a transcoding service and returns it, or returns zero on failure.
//
XMLTransService* XMLPlatformUtils::makeTransService()
{
    //
    //  Since we are going to use the ICU service, we have to tell it where
    //  its converter files are. If the ICU_DATA environment variable is set,
    //  then its been told. Otherwise, we tell it our default value relative
    //  to our DLL.
    //
#if defined (XML_USE_ICU_TRANSCODER)
    return new ICUTransService;
#elif defined (XML_USE_WIN32_TRANSCODER)
    return new Win32TransService;
#elif defined (XML_USE_CYGWIN_TRANSCODER)
    return new CygwinTransService;
#else
    #error You must provide a transcoding service implementation
#endif
}


//
//  This method handles the Win32 per-platform basic init functions. The
//  primary jobs here are getting the path to our DLL and to get the
//  stdout and stderr file handles setup.
//
void XMLPlatformUtils::platformInit()
{

#if 0 && defined(_DEBUG)
    //  Enable this code for memeory leak testing

   // Send all reports to STDOUT
   _CrtSetReportMode( _CRT_WARN, _CRTDBG_MODE_FILE );
   _CrtSetReportFile( _CRT_WARN, _CRTDBG_FILE_STDOUT );
   _CrtSetReportMode( _CRT_ERROR, _CRTDBG_MODE_FILE );
   _CrtSetReportFile( _CRT_ERROR, _CRTDBG_FILE_STDOUT );
   _CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE );
   _CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDOUT );

    int tmpDbgFlag;
    tmpDbgFlag = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
    tmpDbgFlag |= _CRTDBG_LEAK_CHECK_DF;
    _CrtSetDbgFlag(tmpDbgFlag);
#endif

    // Figure out if we are on NT and save that flag for later use
    OSVERSIONINFO   OSVer;
    OSVer.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    ::GetVersionEx(&OSVer);
    gOnNT = (OSVer.dwPlatformId == VER_PLATFORM_WIN32_NT);
}


void XMLPlatformUtils::platformTerm()
{
    // We don't have any temrination requirements for win32 at this time
}

#include <xercesc/util/LogicalPath.c>

XERCES_CPP_NAMESPACE_END