openserverplatformutils.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 663 行 · 第 1/2 页

/*
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * $Log: OpenServerPlatformUtils.cpp,v $
 * Revision 1.16  2004/09/08 13:56:42  peiyongz
 * Apache License Version 2.0
 *
 * Revision 1.15  2004/01/29 11:51:20  cargilld
 * Code cleanup changes to get rid of various compiler diagnostic messages.
 *
 * Revision 1.14  2004/01/13 16:34:21  cargilld
 * Misc memory management changes.
 *
 * Revision 1.13  2003/12/24 15:24:14  cargilld
 * More updates to memory management so that the static memory manager.
 *
 * Revision 1.12  2003/12/17 19:58:05  cargilld
 * Platform update for memory management so that the static memory manager (one
 * used to call Initialize) is only for static data.
 *
 * Revision 1.11  2003/12/17 15:16:10  cargilld
 * Platform update for memory management so that the static memory manager (one
 * used to call Initialize) is only for static data.
 *
 * Revision 1.10  2003/12/17 13:58:03  cargilld
 * Platform update for memory management so that the static memory manager (one
 * used to call Initialize) is only for static data.
 *
 * Revision 1.9  2003/10/01 16:32:40  neilg
 * improve handling of out of memory conditions, bug #23415.  Thanks to David Cargill.
 *
 * Revision 1.8  2003/05/15 18:37:49  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.7  2003/04/25 17:20:11  peiyongz
 * throw exception if getcwd() fails
 *
 * Revision 1.6  2003/04/24 02:55:58  peiyongz
 * Logical Path Resolution
 *
 * Revision 1.5  2003/03/09 16:57:18  peiyongz
 * PanicHandler
 *
 * Revision 1.4  2002/11/19 13:04:32  gareth
 * Bug# 14661 Caldera implemented openFileToWrite and writeBufferToFile. Patch from Cameron Dorrat.
 *
 * Revision 1.3  2002/11/04 15:13:01  tng
 * C++ Namespace Support.
 *
 * Revision 1.2  2002/05/21 20:31:47  tng
 * Minor update: Remove obsolete code
 *
 * Revision 1.1  2002/02/27 22:57:59  peiyongz
 * Bug# 6445 Caldera (SCO) OpenServer Port : patch from Martin Kalen
 *
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------

#if !defined (APP_NO_THREADS)
#include     <pthread.h>
#endif


#include    <unistd.h>
#include    <stdio.h>
#include    <stdlib.h>
#include    <errno.h>
#include    <libgen.h>
#include    <sys/time.h>
#include    <netinet/in.h>
#include    <arpa/inet.h>
#include    <xercesc/util/PlatformUtils.hpp>
#include    <xercesc/util/RuntimeException.hpp>
#include    <xercesc/util/Janitor.hpp>
#include    <xercesc/util/Mutexes.hpp>
#include    <xercesc/util/XMLString.hpp>
#include    <xercesc/util/XMLUniDefs.hpp>
#include    <xercesc/util/XMLUni.hpp>
#include    <xercesc/util/PanicHandler.hpp>
#include    <xercesc/util/OutOfMemoryException.hpp>

#if defined (XML_USE_ICU_TRANSCODER)
#   include <xercesc/util/Transcoders/ICU/ICUTransService.hpp>
#else
//  Same as -DXML_USE_NATIVE_TRANSCODER
#   include <xercesc/util/Transcoders/Iconv/IconvTransService.hpp>
#endif


#if defined(XML_USE_ICU_MESSAGELOADER)
#   include <xercesc/util/MsgLoaders/ICU/ICUMsgLoader.hpp>
#elif defined (XML_USE_ICONV_MESSAGELOADER)
#   include <xercesc/util/MsgLoaders/MsgCatalog/MsgCatalogLoader.hpp>
#else
//  Same as -DXML_USE_INMEM_MESSAGELOADER
#   include <xercesc/util/MsgLoaders/InMemory/InMemMsgLoader.hpp>
#endif


#if defined (XML_USE_NETACCESSOR_LIBWWW)
#   include <xercesc/util/NetAccessors/libWWW/LibWWWNetAccessor.hpp>
#else
//  Same as -DXML_USE_NETACCESSOR_SOCKET
#   include <xercesc/util/NetAccessors/Socket/SocketNetAccessor.hpp>
#endif

XERCES_CPP_NAMESPACE_BEGIN

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

//
//  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.
//
XMLMsgLoader* XMLPlatformUtils::loadAMsgSet(const XMLCh* const msgDomain)
{
    XMLMsgLoader* retVal = 0;
    try
    {
#if defined (XML_USE_ICU_MESSAGELOADER)
        retVal = new ICUMsgLoader(msgDomain);
#elif defined (XML_USE_ICONV_MESSAGELOADER)
        retVal = new MsgCatalogLoader(msgDomain);
#else
        retVal = new InMemMsgLoader(msgDomain);
#endif
    }
    catch(const OutOfMemoryException&)
    {
        throw;
    }
    catch(...)
    {
        panic(PanicHandler::Panic_CantLoadMsgDomain);
    }
    return retVal;
}


XMLNetAccessor* XMLPlatformUtils::makeNetAccessor()
{
#if defined (XML_USE_NETACCESSOR_LIBWWW)
    return new LibWWWNetAccessor();
#else
    return new SocketNetAccessor();
#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()
{
#if defined (XML_USE_ICU_TRANSCODER)
	return new ICUTransService;
#else
	return new IconvTransService;
#endif
}


// ---------------------------------------------------------------------------
//  XMLPlatformUtils: The panic method
// ---------------------------------------------------------------------------
void XMLPlatformUtils::panic(const PanicHandler::PanicReasons reason)
{
    fgUserPanicHandler? fgUserPanicHandler->panic(reason) : fgDefaultPanicHandler->panic(reason);	
}

// ---------------------------------------------------------------------------
//  XMLPlatformUtils: File Methods
// ---------------------------------------------------------------------------
unsigned int XMLPlatformUtils::curFilePos(FileHandle theFile
                                          , MemoryManager* const manager)
{
    // Get the current position
    int curPos = ftell((FILE*)theFile);
    if (curPos == -1)
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotGetSize, manager);

    return (unsigned int)curPos;
}

void XMLPlatformUtils::closeFile(FileHandle theFile
                                 , MemoryManager* const manager)
{
    if (fclose((FILE*)theFile))
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotCloseFile, manager);
}

unsigned int XMLPlatformUtils::fileSize(FileHandle theFile
                                        , MemoryManager* const manager)
{
    // Get the current position
    long int curPos = ftell((FILE*)theFile);
    if (curPos == -1)
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotGetCurPos, manager);

    // Seek to the end and save that value for return
	if (fseek((FILE*)theFile, 0, SEEK_END))
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotSeekToEnd, manager);

    long int retVal = ftell((FILE*)theFile);
    if (retVal == -1)
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotSeekToEnd, manager);

    // And put the pointer back
    if (fseek((FILE*)theFile, curPos, SEEK_SET))
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotSeekToPos, manager);

    return (unsigned int)retVal;
}

FileHandle XMLPlatformUtils::openFile(const XMLCh* const fileName
                                      , MemoryManager* const manager)
{
    const char* tmpFileName = XMLString::transcode(fileName, manager);
    ArrayJanitor<char> janText((char*)tmpFileName, manager);
    FileHandle retVal = (FILE*)fopen(tmpFileName , "rb");

    if (retVal == NULL)
        return 0;

    return retVal;
}

FileHandle XMLPlatformUtils::openFile(const char* const fileName
                                      , MemoryManager* const manager)
{
    FileHandle retVal = (FILE*)fopen(fileName, "rb");

    if (retVal == NULL)
        return 0;

    return retVal;
}

FileHandle XMLPlatformUtils::openFileToWrite(const XMLCh* const fileName
                                             , MemoryManager* const manager)
{
    const char* tmpFileName = XMLString::transcode(fileName, manager);
    ArrayJanitor<char> janText((char*)tmpFileName, manager);
    return fopen( tmpFileName , "wb" );
}

FileHandle XMLPlatformUtils::openFileToWrite(const char* const fileName
                                             , MemoryManager* const manager)
{
    return fopen( fileName , "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;
        }