cmacfile_carbon.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:20k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include <fcntl.h>
- #include "CMacFile.h"
- #include "MoreFilesX.h"
- #include "filespecutils.h"
- #include "hx_moreprocesses.h"
- #include "hxstrutl.h"
- OSType CMacFile::sCreator = 'PNst';
- OSType CMacFile::sFileType = 'PNRA';
- BOOL gReadDone = FALSE;
- ULONG32 gReadCount = 0;
- // async callback proc
- pascal void ReadCallback(ParamBlockRec* pb);
- // async callback UPP
- static IOCompletionUPP gReadCallbackUPP=NewIOCompletionUPP(ReadCallback);
- CHXDataFile*
- CHXDataFile::Construct(UINT32 ulFlags, IUnknown** ppCommonObj)
- {
- return (CHXDataFile *) new CMacFile;
- }
- // CHXFile should set the file reference to a value indicating the file is not open
- CMacFile::CMacFile (void)
- {
- mRefNum = 0;
- mLastError = noErr;
- mAppendMode = FALSE;
- mBufferFile = NULL;
- mBufferedRead = FALSE;
- mWriteFile = NULL;
- mBufferedWrite = FALSE;
-
- m_pseudoFileHandle = NULL; // if non-null, a memory manager handle containing the "file data"
- m_pseudoFileOffset = 0; // current "read" position in the pseudo file
- m_pseudoFileSize = 0; // total pseudo file size
- }
- // ~CHXFile should close the file if it is open
- CMacFile::~CMacFile(void)
- {
- Close(); // close file if necessary
- }
- // Create a file with the specified mode
- // Close the previous file if it was open
- HX_RESULT CMacFile::Create(const char *filename, UINT16 mode,BOOL textflag)
- {
- Close(); // close previous file if necessary
-
- CHXFileSpecifier fileSpec(filename);
-
- require_return(fileSpec.IsSet(), HXR_INVALID_PATH);
- BOOL bExistsAlready;
-
- OSErr err = noErr;
-
- // if the file already exists, it might be an alias file to somewhere else
- // (well, the pre-Carbon code checked for this; I'm not sure why we're resolving
- // an alias file if this path already exists)
-
- bExistsAlready = CHXFileSpecUtils::FileExists(fileSpec);
- if (bExistsAlready)
- {
- CHXFileSpecUtils::ResolveFileSpecifierAlias(fileSpec);
-
- bExistsAlready = CHXFileSpecUtils::FileExists(fileSpec);
- }
-
- // create the file if it doesn't already exist
- FSRef parentRef;
- HFSUniStr255 hfsName;
- FSRef openFileRef;
-
- parentRef = (FSRef) fileSpec.GetParentDirectory();
- hfsName = fileSpec.GetNameHFSUniStr255();
-
- if (!bExistsAlready)
- {
- FSCatalogInfo catInfo;
- FileInfo fInfo;
- FSSpec *kDontWantSpec = NULL;
-
- ZeroInit(&fInfo);
- fInfo.fileCreator = textflag ? 'ttxt' : sCreator;
- fInfo.fileType = textflag ? 'TEXT' : sFileType;
-
- (* (FileInfo *) &catInfo.finderInfo) = fInfo;
-
- err = FSCreateFileUnicode(&parentRef, hfsName.length,
- hfsName.unicode, kFSCatInfoFinderInfo, &catInfo,
- &openFileRef, kDontWantSpec);
- }
- else // already existed...
- {
- openFileRef = (FSRef) fileSpec;
- }
-
- // open the file (to mimic Windows' create semantics)
- if (err == noErr)
- {
- HFSUniStr255 dataForkName;
-
- dataForkName.length = 0;
- err = FSGetDataForkName(&dataForkName);
- check_noerr(err);
-
- err = FSOpenFork(&openFileRef, dataForkName.length, dataForkName.unicode,
- fsRdWrPerm, &mRefNum);
- }
-
- if (err == noErr)
- {
- mFile = openFileRef;
-
- err = FSSetForkSize(mRefNum, fsFromStart, 0);
- }
-
- mLastError = err;
-
- return (err != noErr ? -1 : 0);
- }
- // Open a file with the specified permissions
- // Close the previous file if it was open
- //
- // If the file isn't found, look for a 'RLFL' resource *in the current
- // resource chain* with the same name as the file.
- HX_RESULT CMacFile::Open(const char *filename, UINT16 mode,BOOL textflag)
- {
- Close(); // close previous file if necessary
-
- CHXFileSpecifier fileSpec(filename);
-
- if (!fileSpec.IsSet()) return HXR_INVALID_PATH; // fails if we're trying to open a file inside a non-existing directory
-
- short perm;
-
- // figure out mac file permission
- perm = fsRdPerm;
- if (mode & O_WRONLY)
- {
- perm = fsWrPerm;
- }
- else if (mode & O_RDONLY)
- {
- perm = fsRdPerm;
- }
- else if (mode & O_RDWR)
- {
- perm = fsRdWrPerm;
- }
-
- // Store the permissions for this file for later.
- m_mode = mode;
- BOOL bExistsAlready;
-
- OSErr err = fnfErr;
-
- bExistsAlready = CHXFileSpecUtils::FileExists(fileSpec);
- if (bExistsAlready)
- {
- CHXFileSpecUtils::ResolveFileSpecifierAlias(fileSpec);
-
- bExistsAlready = CHXFileSpecUtils::FileExists(fileSpec);
- }
-
- if (!bExistsAlready && ((mode & O_CREAT) || (mode & O_WRONLY)))
- {
- return Create(filename, mode, textflag);
- }
-
- if (bExistsAlready)
- {
- HFSUniStr255 dataForkName;
- FSRef openFileRef;
-
- dataForkName.length = 0;
- err = FSGetDataForkName(&dataForkName);
- check_noerr(err);
-
- openFileRef = (FSRef) fileSpec;
-
- err = FSOpenFork(&openFileRef, dataForkName.length, dataForkName.unicode,
- perm, &mRefNum);
-
- if (err == noErr)
- {
- mFile = openFileRef;
- }
- }
-
- if ((err != noErr) && (mode & O_RDONLY))
- {
- Handle resHandle;
- SInt32 resSize;
- Str255 pascFileName;
-
- // We couldn't open the file, and the request was read-only
- //
- // See if there's a pseudo-file resource we can use
- //
- // We need a handle to the resource so we can read from it, but
- // we don't want the whole resource loaded into memory, so we
- // set ResLoad to false.
-
- SetResLoad(false);
- fileSpec.GetName().MakeStr255(pascFileName);
- resHandle = GetNamedResource(kRealFileResource, pascFileName); // 'RLFL'
- SetResLoad(true);
-
- if (resHandle)
- {
- // we have a handle to the resource; determine
- // its size and reset our "file pointer"
-
- resSize = GetResourceSizeOnDisk(resHandle);
- if (resSize > 0)
- {
- m_pseudoFileHandle = resHandle;
- m_pseudoFileSize = resSize;
- m_pseudoFileOffset = 0;
-
- err = noErr;
- mRefNum = -1; // signals that we're using a pseudo-file and no actual file is open
- }
- }
- }
-
- if (!m_pseudoFileHandle)
- {
- if((err == noErr) && (mode & O_CREAT))
- {
- err = ::SetEOF(mRefNum, 0L);
- }
-
- if(err == noErr)
- {
- mAppendMode = (mode & O_APPEND);
- if (mode & O_TRUNC)
- {
- err = ::SetEOF(mRefNum, 0L);
- }
- }
- if (err != noErr && mRefNum != 0)
- {
- Close();
- }
- }
-
- mLastError = err;
-
- return(err != noErr ? HXR_DOC_MISSING : 0);
- }
- // Close the previous file if it was open
- HX_RESULT CMacFile::Close(void)
- {
- OSErr err = noErr;
- if (m_pseudoFileHandle)
- {
- // "close" our pseudo file
- //
- // We don't need or want to dispose or release our pseudo-
- // file handle since it's not using up memory anyway, and
- // releasing it would hurt anyone else who happens to be
- // reading from it. The handle will be released
- // automatically when its owning resource file closes.
-
- m_pseudoFileHandle = 0;
- m_pseudoFileOffset = 0;
- m_pseudoFileSize = 0;
- err = noErr;
- mRefNum = 0;
- }
-
- else if (mRefNum)
- {
- if (mBufferFile)
- {
- delete mBufferFile;
- mBufferFile = NULL;
- }
-
- if (mWriteFile)
- {
- delete mWriteFile;
- mWriteFile = NULL;
- }
-
- OSErr tempErr;
- FSVolumeRefNum vRefNum;
-
- tempErr = FSGetVRefNum(&mFile, &vRefNum);
- // close a real file
- err = ::FSCloseFork(mRefNum);
- mRefNum = 0;
- if (err == noErr && tempErr == noErr)
- {
- tempErr = ::FlushVol(nil, vRefNum);
- }
- }
-
- mLastError = err;
- return(err != noErr ? -1 : 0);
- }
- HX_RESULT CMacFile::Delete (const char *filename)
- {
- HX_RESULT res;
-
- require_return(!m_pseudoFileHandle, HXR_INVALID_OPERATION);
-
- CHXFileSpecifier fileSpec(filename);
-
- res = CHXFileSpecUtils::RemoveFile(fileSpec);
-
- return SUCCEEDED(res) ? 0 : -1;
-
- }
- /* Returns the size of the file in bytes. */
- ULONG32 CMacFile::GetSize(void)
- {
- ULONG32 fileSize = 0;
- if (m_pseudoFileHandle)
- {
- fileSize = m_pseudoFileSize;
- }
- else if (mRefNum)
- {
- OSErr err;
- SInt64 forkSize;
-
- err = FSGetForkSize(mRefNum, &forkSize);
- if (err == noErr)
- {
- fileSize = (ULONG32) forkSize;
- }
- }
- else
- {
- check(!"Cannot get file size because no file is open");
- }
-
- return fileSize;
- }
- // Rewinds the file position to the start of the file
- HX_RESULT CMacFile::Rewind(void)
- {
- OSErr err;
- if (m_pseudoFileHandle)
- {
- m_pseudoFileOffset = 0;
- err = noErr;
- }
- else
- {
- err = ::FSSetForkPosition(mRefNum, fsFromStart, 0);
- }
- mLastError = err;
- return(err != noErr ? HXR_INVALID_FILE : HXR_OK);
- }
-
- // Seek moves the current file position to the offset from the fromWhere specifier
- HX_RESULT CMacFile::Seek(ULONG32 offset, UINT16 fromWhere)
- {
- OSErr err = noErr;
-
- if (m_pseudoFileHandle)
- {
- switch(fromWhere)
- {
- case SEEK_SET:
- m_pseudoFileOffset = offset;
- break;
- case SEEK_CUR:
- m_pseudoFileOffset += offset;
- break;
- case SEEK_END:
- m_pseudoFileOffset = (m_pseudoFileSize - 1) - offset;
- break;
- }
-
- // don't go beyond the end (we won't return eofErr either to match
- // the real seek below)
- if (m_pseudoFileOffset >= m_pseudoFileSize)
- {
- m_pseudoFileOffset = m_pseudoFileSize - 1;
- }
- err = HXR_OK;
- }
- else if (mBufferedWrite)
- {
- long pos = 0;
- switch(fromWhere)
- {
- case SEEK_SET:
- pos = offset;
- break;
- case SEEK_CUR:
- pos = mWriteFile->GetCurPos() + offset;
- break;
- case SEEK_END:
- pos = (mWriteFile->GetBufSize() - 1) - offset;
- break;
- }
- mWriteFile->Seek(pos);
- }
- else
- {
- switch(fromWhere)
- {
- case SEEK_SET:
- fromWhere = fsFromStart;
- break;
- case SEEK_CUR:
- fromWhere = fsFromMark;
- break;
- case SEEK_END:
- fromWhere = fsFromLEOF;
- break;
- }
-
- err = ::SetFPos(mRefNum, fromWhere, offset);
- // returning eofErr was causing problems for ChunkyRes during http play
- if (err == eofErr)
- {
- err = ::SetEOF(mRefNum, offset);
- err = ::SetFPos(mRefNum, fromWhere, offset);
- err = HXR_OK;
- }
-
- long pos;
- ::GetFPos(mRefNum,(long *)&pos);
- if(!err && mBufferedRead)
- {
- long count;
- ::GetEOF(mRefNum, &count);
- mBufferFile->PreLoad(pos,count - offset);
- }
- /* if(!theErr && mBufferedWrite)
- {
- mWriteFile->Seek(pos);
- } */
- }
- mLastError = err;
- return(err != noErr ? HXR_INVALID_FILE : 0);
- }
- // Tell
- ULONG32 CMacFile::Tell(void)
- {
- ULONG32 pos;
- if (m_pseudoFileHandle)
- {
- pos = m_pseudoFileOffset;
- mLastError = noErr;
- }
- else
- {
- mLastError = ::GetFPos(mRefNum,(long *)&pos);
- }
- return(pos);
- }
- // callback could be at interrupt time
- pascal void ReadCallback(ParamBlockRec* pb)
- {
- OSErr theErr = (*pb).ioParam.ioResult;
- gReadCount = pb->ioParam.ioActCount;
- gReadDone = TRUE;
- }
- /* Read reads up to count bytes of data into buf.
- returns the number of bytes read, EOF, or -1 if the read failed */
- ULONG32 CMacFile::Read (char *buf, ULONG32 count)
- {
- OSErr theErr = noErr;
- if (m_pseudoFileHandle)
- {
- INT32 actualCount;
-
- theErr = Read(buf, count, &actualCount);
-
- count = actualCount;
- }
- else
- {
- if(mBufferedRead)
- {
- count = Copy(buf,count);
- if(count == 0)
- theErr = eofErr;
- }
- else
- {
- // can't do synchronous read at interrupt time
- if (IsRunningNativeOnMacOSX() || IsMacInCooperativeThread())
- {
- theErr = ::FSRead(mRefNum, (long *)&count, buf);
- }
- else
- { // async i/o - callback could be at interrupt time
- #if 1
- ParamBlockRec pb;
-
- gReadCount = 0;
- gReadDone = FALSE;
- pb.ioParam.ioRefNum = mRefNum;
- pb.ioParam.ioBuffer = buf;
- pb.ioParam.ioReqCount = count;
- pb.ioParam.ioPosMode=fsAtMark;
- pb.ioParam.ioCompletion = gReadCallbackUPP;
- theErr = PBReadAsync(&pb);
-
- UINT32 timeout = TickCount() + 60L;
- while (!gReadDone && timeout-TickCount() > 0)
- {
- }
-
- count = gReadCount;
- #endif
- }
- }
- if (theErr == eofErr && count > 0)
- {
- theErr = noErr;
- }
- }
- mLastError = theErr;
-
- return(mLastError ? 0 : count); //smplfsys::read assumes we return 0 for eof
- }
- /* Read reads up to count bytes of data into buf.
- returns the number of bytes read, EOF, or -1 if the read failed */
- INT16 CMacFile::Read (char *buf, INT32 count, INT32 *actualCount)
- {
- OSErr theErr = noErr;
- long readCount = (long) count;
-
- if (m_pseudoFileHandle)
- {
- // read from our pseudo-file
- SInt32 remainingBytes;
-
- remainingBytes = m_pseudoFileSize - m_pseudoFileOffset;
- if (remainingBytes <= 0)
- {
- // we've already exhausted the buffer
- theErr = eofErr;
- }
- else
- {
- // some bytes remain to be "read" so read them directly
- // from the resource into the caller's buffer
-
- if (remainingBytes < count)
- {
- count = remainingBytes;
- }
-
- ReadPartialResource(m_pseudoFileHandle, m_pseudoFileOffset, buf, count);
- theErr = ResError();
-
- HX_ASSERT(theErr == noErr);
- // while we don't expect any errors, -188 (resourceInMemory) isn't fatal
-
- if (theErr == noErr || theErr == resourceInMemory)
- {
- // update our pseudo-file pointer
-
- readCount = count;
-
- m_pseudoFileOffset += count;
-
- theErr = noErr;
- }
- }
-
- }
- else
- {
- if(mBufferedRead)
- {
- readCount = Copy(buf,readCount);
- if(readCount == 0)
- theErr = eofErr;
- }
- else
- {
- if (IsRunningNativeOnMacOSX() || IsMacInCooperativeThread())
- theErr = ::FSRead(mRefNum, &readCount, buf);
- else
- { // async i/o - callback could be at interrupt time
- #if 0
- ParamBlockRec pb;
- // IOCompletionUPP proc = NewIOCompletionProc(ReadCallback);
-
- gReadCount = 0;
- gReadDone = FALSE;
- pb.ioParam.ioRefNum = mRefNum;
- pb.ioParam.ioBuffer = buf;
- pb.ioParam.ioReqCount = count;
- pb.ioParam.ioPosMode=fsAtMark;
- pb.ioParam.ioCompletion = m_CompletionProc;
- theErr = PBReadAsync(&pb);
-
- EventRecord theEvent;
- long sleepTime=10;
- long timeout = 0;
- // timeout, in case file read can't complete
- while (!gReadDone && timeout < 100)
- {
- ::WaitNextEvent(everyEvent, &theEvent, sleepTime, nil);
- timeout++;
- }
- count = gReadCount;
- #endif
- }
- }
- }
-
- if(theErr == eofErr && readCount > 0)
- theErr = noErr;
- if (actualCount)
- {
- *actualCount = (INT32) readCount;
- }
-
- return(theErr);
- }
- /* Write writes up to count bytes of data from buf.
- returns the number of bytes written, or -1 if the write failed */
- ULONG32 CMacFile::Write(const char *buf, ULONG32 count)
- {
- HX_ASSERT(!m_pseudoFileHandle);
-
- OSErr theErr = noErr;
- if (IsRunningNativeOnMacOSX() || IsMacInCooperativeThread())
- {
- if(mAppendMode)
- {
- theErr = ::SetFPos(mRefNum,fsFromLEOF,0L);
- }
-
- if(!theErr)
- {
- if(mBufferedWrite)
- {
- mWriteFile->write_data((Ptr)buf,(long)count);
- }
- else
- {
- theErr = ::FSWrite(mRefNum, (long *)&count, buf);
- //check_noerr(theErr); a disk full error may occur
- }
- }
- mLastError = theErr;
- // return(theErr ? -1 : count);
- }
- else
- {
- if(mBufferedWrite)
- {
- mWriteFile->write_data((Ptr)buf,(long)count);
- }
- mLastError = theErr;
- }
- return ((theErr == noErr) ? count : -1);
- }
- /* Write writes up to count bytes of data from buf.
- returns the number of bytes written, or -1 if the write failed */
- INT16 CMacFile::Write(const char *buf, INT32 count, INT32 *actualCount)
- {
- HX_ASSERT(!m_pseudoFileHandle);
- OSErr theErr = noErr;
- *actualCount = 0;
- if (IsRunningNativeOnMacOSX() || IsMacInCooperativeThread())
- {
- long writeCount = 0;
-
- if(mAppendMode)
- theErr = ::SetFPos(mRefNum, fsFromLEOF, 0L);
-
- if(!theErr)
- {
- writeCount = count;
- theErr = ::FSWrite(mRefNum, &writeCount, buf);
- }
-
- *actualCount = (INT32) writeCount;
- }
-
- //check_noerr(theErr); a disk full error may occur
-
- // elsewhere the file code expects a negative actualCount when
- // the write failed
- if (theErr != noErr) *actualCount = -1;
-
- return(theErr);
- }
- void CMacFile::SetFileType(OSType creator, OSType type)
- {
- sFileType = type;
- sCreator = creator;
- }
- long CMacFile::Copy(Ptr destBuf, long numBytes)
- {
- long count;
- // check for buffered i/o
- if(mBufferedRead)
- count = mBufferFile->Copy(destBuf,numBytes);
- else
- count = 0;
-
- return(count);
- }
- HX_RESULT CMacFile::set_buffered_read (char buffered)
- {
- Boolean OK = TRUE;
- HX_ASSERT(!m_pseudoFileHandle);
- // If this file is setup for writing then we don't want to do any buffered reading.
- if (m_mode & O_WRONLY) return HXR_OK;
- if (m_mode & O_RDWR) return HXR_OK;
- mBufferedRead = 0;
- return HXR_OK; //HACK! - this needs to be redone!
-
- // set up buffered read object if necessary
- if(buffered && !mBufferedRead)
- {
- if(mBufferFile == NULL)
- {
- mBufferFile = new CBufferFile;
- OK = mBufferFile != NULL;
- }
-
- if(OK)
- OK = mBufferFile->Specify(mRefNum);
-
-
- }
- else if(!buffered && mBufferedRead)
- {
- if(mBufferFile != NULL)
- {
- delete mBufferFile;
- mBufferFile = NULL;
- }
- }
- mBufferedRead = buffered != 0;
- if(OK)
- Seek(0,SEEK_SET);
-
- return(OK ? HXR_OK : HXR_OUTOFMEMORY);
- }
- HX_RESULT CMacFile::set_buffered_write (char buffered)
- {
- Boolean OK = TRUE;
- HX_ASSERT(!m_pseudoFileHandle);
- // set up buffered read object if necessary
- if(buffered && !mBufferedWrite)
- {
- if(mWriteFile == NULL)
- {
- mWriteFile = new CWriteFile;
- OK = mWriteFile != NULL;
- }
-
- if(OK)
- {
- OK = mWriteFile->Specify(mRefNum,Tell());
- }
- }
- else if(!buffered && mBufferedWrite)
- {
- if(mWriteFile != NULL)
- {
- delete mWriteFile;
- mWriteFile = NULL;
- }
- }
- mBufferedWrite = buffered != 0;
-
- return(OK ? HXR_OK : HXR_OUTOFMEMORY);
- }
- // This seems to exist solely so FileIO::status can get the size and an error value;
- // Otherwise, it's redundant with GetSize
- INT16 CMacFile::FileSize(long *size)
- {
- if (m_pseudoFileSize)
- {
- *size = m_pseudoFileSize;
- return 0;
- }
- return ::GetEOF(mRefNum, size);
- }
- BOOL CMacFile::GetTemporaryFileName(const char *tag, char* name, UINT32 ulBufLen)
- {
- // we'll make a temp name like tag_2345
-
- CHXString tempNameTemplate(tag);
-
- tempNameTemplate += "_%SUB%";
-
- CHXDirSpecifier tempDirSpec = CHXFileSpecUtils::GetSystemTempDirectory();
-
- CHXFileSpecifier tempFileSpec = CHXFileSpecUtils::GetUniqueTempFileSpec(
- tempDirSpec, (const char *) tempNameTemplate, "%SUB%");
-
- // copy the temp path to the supplied buffer, name
-
- name[0] = ' ';
- if (tempFileSpec.IsSet())
- {
- CHXString strPath = tempFileSpec.GetPathName();
-
- SafeStrCpy(name, (const char *) strPath, ulBufLen);
-
- return TRUE;
- }
- return FALSE;
-
- }