cygwinplatformutils.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 572 行 · 第 1/2 页

    return fopen( posix_name , "wb" );
}

FileHandle XMLPlatformUtils::openStdInHandle(MemoryManager* const manager)
{
    return (FileHandle)fdopen(dup(0), "rb");
}

unsigned int
XMLPlatformUtils::readFileBuffer( FileHandle          theFile
                                , const unsigned int  toRead
                                , XMLByte* const      toFill
                                , MemoryManager* const manager)
{
    size_t noOfItemsRead = fread((void*) toFill, 1, toRead, (FILE*)theFile);

    if(ferror((FILE*)theFile))
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotReadFromFile, manager);
    }

    return (unsigned int)noOfItemsRead;
}

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;
    size_t bytesWritten = 0;

    while (true)
    {
        bytesWritten=fwrite(tmpFlush, sizeof(XMLByte), toWrite, (FILE*)theFile);

        if(ferror((FILE*)theFile))
        {
            ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotWriteToFile, manager);
        }

        if (bytesWritten < 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 (fseek((FILE*)theFile, 0, SEEK_SET))
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotResetFile, manager);
}


// ---------------------------------------------------------------------------
//  XMLPlatformUtils: File system methods
// ---------------------------------------------------------------------------
XMLCh* XMLPlatformUtils::getFullPath(const XMLCh* const srcPath,
                                     MemoryManager* const manager)
{
    //
    //  NOTE: The path provided has always already been opened successfully,
    //  so we know that its not some pathological freaky path. It comes in
    //  in native format, and goes out as Unicode always
    //
    char* newSrc = XMLString::transcode(srcPath, manager);
    ArrayJanitor<char> janText(newSrc, manager);

    // Use a local buffer that is big enough for the largest legal path
	char posix_name[PATH_MAX + 1];
    // get the absolute path
    if (0 != cygwin_conv_to_full_posix_path(newSrc, posix_name))
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotGetBasePathName, manager);
    }
    return XMLString::transcode(posix_name, 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;

    //
    //  If it starts with a slash, then it cannot be relative. This covers
    //  both something like "\Test\File.xml" and an NT Lan type remote path
    //  that starts with a node like "\\MyNode\Test\File.xml".
    //
    if (toCheck[0] == XMLCh('/'))
        return false;

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

XMLCh* XMLPlatformUtils::getCurrentDirectory(MemoryManager* const manager)
{
    char  dirBuf[PATH_MAX + 2];
    char  *curDir = getcwd(&dirBuf[0], PATH_MAX + 1);

    if (!curDir)
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotGetBasePathName, manager);
    }

    return XMLString::transcode(curDir, manager);
}

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

// ---------------------------------------------------------------------------
//  XMLPlatformUtils: Timing Methods
// ---------------------------------------------------------------------------

unsigned long XMLPlatformUtils::getCurrentMillis()
{
    timeb aTime;
    ftime(&aTime);
    return (unsigned long)(aTime.time*1000 + aTime.millitm);

}

// -----------------------------------------------------------------------
//  Mutex methods
// -----------------------------------------------------------------------

#if !defined(APP_NO_THREADS)

// ---------------------------------------------------------------------------
//  XMLPlatformUtils: Platform init method
// ---------------------------------------------------------------------------
void XMLPlatformUtils::platformInit()
{
}

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

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

void* XMLPlatformUtils::compareAndSwap (void**             toFill,
                                        const void* const  newValue,
                                        const void* const  toCompare)
{
#if defined WIN64
	return ::InterlockedCompareExchangePointer(toFill, (void*)newValue, (void*)toCompare);
#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
}

int XMLPlatformUtils::atomicIncrement(int &location)
{
    return ::InterlockedIncrement(&(long &)location);
}

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

#else // #if !defined (APP_NO_THREADS)

void XMLPlatformUtils::platformInit()
{
}

void* XMLPlatformUtils::makeMutex()
{
	return 0;
}

void XMLPlatformUtils::closeMutex(void* const mtxHandle)
{
}

void XMLPlatformUtils::lockMutex(void* const mtxHandle)
{
}

void XMLPlatformUtils::unlockMutex(void* const mtxHandle)
{
}

void* XMLPlatformUtils::compareAndSwap (void**             toFill,
                                        const void* const  newValue,
                                        const void* const  toCompare)
{
	void *retVal = *toFill;
	if (*toFill == toCompare)
		*toFill = (void *)newValue;
	return retVal;
}

int XMLPlatformUtils::atomicIncrement(int &location)
{
	return ++location;
}

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

#endif // APP_NO_THREADS

void XMLPlatformUtils::platformTerm()
{
}

#include <xercesc/util/LogicalPath.c>

XERCES_CPP_NAMESPACE_END