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610 lines
20 KiB
C
610 lines
20 KiB
C
/*
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** Apple Macintosh Developer Technical Support
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**
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** DirectoryCopy: A robust, general purpose directory copy routine.
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**
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** by Jim Luther, Apple Developer Technical Support Emeritus
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**
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** File: DirectoryCopy.c
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**
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** Copyright © 1992-1996 Apple Computer, Inc.
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** All rights reserved.
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**
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** You may incorporate this sample code into your applications without
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** restriction, though the sample code has been provided "AS IS" and the
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** responsibility for its operation is 100% yours. However, what you are
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** not permitted to do is to redistribute the source as "DSC Sample Code"
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** after having made changes. If you're going to re-distribute the source,
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** we require that you make it clear in the source that the code was
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** descended from Apple Sample Code, but that you've made changes.
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*/
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#include <Types.h>
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#include <Errors.h>
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#include <Memory.h>
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#include <Files.h>
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#include <Script.h>
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#define __COMPILINGMOREFILES
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#include "MoreFiles.h"
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#include "MoreFilesExtras.h"
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#include "MoreDesktopMgr.h"
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#include "FileCopy.h"
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#include "DirectoryCopy.h"
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/*****************************************************************************/
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/* local constants */
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enum
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{
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dirCopyBigCopyBuffSize = 0x00004000,
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dirCopyMinCopyBuffSize = 0x00000200
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};
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/*****************************************************************************/
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/* local data structures */
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/* The EnumerateGlobals structure is used to minimize the amount of
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** stack space used when recursively calling CopyLevel and to hold
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** global information that might be needed at any time. */
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#if PRAGMA_ALIGN_SUPPORTED
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#pragma options align=mac68k
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#endif
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struct EnumerateGlobals
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{
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Ptr copyBuffer; /* pointer to buffer used for file copy operations */
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long bufferSize; /* the size of the copy buffer */
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CopyErrProcPtr errorHandler; /* pointer to error handling function */
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CopyFilterProcPtr copyFilterProc; /* pointer to filter function */
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OSErr error; /* temporary holder of results - saves 2 bytes of stack each level */
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Boolean bailout; /* set to true to by error handling function if fatal error */
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short destinationVRefNum; /* the destination vRefNum */
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Str63 itemName; /* the name of the current item */
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CInfoPBRec myCPB; /* the parameter block used for PBGetCatInfo calls */
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};
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#if PRAGMA_ALIGN_SUPPORTED
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#pragma options align=reset
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#endif
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typedef struct EnumerateGlobals EnumerateGlobals;
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typedef EnumerateGlobals *EnumerateGlobalsPtr;
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/* The PreflightGlobals structure is used to minimize the amount of
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** stack space used when recursively calling GetLevelSize and to hold
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** global information that might be needed at any time. */
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#if PRAGMA_ALIGN_SUPPORTED
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#pragma options align=mac68k
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#endif
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struct PreflightGlobals
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{
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OSErr result; /* temporary holder of results - saves 2 bytes of stack each level */
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Str63 itemName; /* the name of the current item */
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CInfoPBRec myCPB; /* the parameter block used for PBGetCatInfo calls */
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unsigned short dstBlksPerAllocBlk; /* the number of 512 byte blocks per allocation block on destination */
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unsigned short allocBlksNeeded; /* the total number of allocation blocks needed */
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unsigned short tempBlocks; /* temporary storage for calculations (save some stack space) */
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CopyFilterProcPtr copyFilterProc; /* pointer to filter function */
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};
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#if PRAGMA_ALIGN_SUPPORTED
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#pragma options align=reset
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#endif
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typedef struct PreflightGlobals PreflightGlobals;
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typedef PreflightGlobals *PreflightGlobalsPtr;
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/*****************************************************************************/
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/* static prototypes */
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static void GetLevelSize(long currentDirID,
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PreflightGlobalsPtr theGlobals);
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static OSErr PreflightDirectoryCopySpace(short srcVRefNum,
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long srcDirID,
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short dstVRefNum,
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CopyFilterProcPtr copyFilterProc,
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Boolean *spaceOK);
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static void CopyLevel(long sourceDirID,
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long dstDirID,
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EnumerateGlobalsPtr theGlobals);
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/*****************************************************************************/
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static void GetLevelSize(long currentDirID,
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PreflightGlobalsPtr theGlobals)
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{
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short index = 1;
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do
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{
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theGlobals->myCPB.dirInfo.ioFDirIndex = index;
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theGlobals->myCPB.dirInfo.ioDrDirID = currentDirID; /* we need to do this every time */
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/* through, since GetCatInfo */
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/* returns ioFlNum in this field */
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theGlobals->result = PBGetCatInfoSync(&theGlobals->myCPB);
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if ( theGlobals->result == noErr )
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{
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if ( (theGlobals->copyFilterProc == NULL) ||
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CallCopyFilterProc(theGlobals->copyFilterProc, &theGlobals->myCPB) ) /* filter if filter proc was supplied */
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{
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/* Either there's no filter proc OR the filter proc says to use this item */
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if ( (theGlobals->myCPB.dirInfo.ioFlAttrib & ioDirMask) != 0 )
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{
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/* we have a directory */
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GetLevelSize(theGlobals->myCPB.dirInfo.ioDrDirID, theGlobals); /* recurse */
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theGlobals->result = noErr; /* clear error return on way back */
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}
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else
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{
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/* we have a file - add its allocation blocks to allocBlksNeeded */
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/* get number of 512-byte blocks needed for data fork */
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theGlobals->tempBlocks = ((unsigned long)theGlobals->myCPB.hFileInfo.ioFlLgLen % 512) ?
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(((unsigned long)theGlobals->myCPB.hFileInfo.ioFlLgLen >> 9) + 1) :
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((unsigned long)theGlobals->myCPB.hFileInfo.ioFlLgLen >> 9);
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/* now, calculate number of new allocation blocks needed */
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theGlobals->allocBlksNeeded += (theGlobals->tempBlocks % theGlobals->dstBlksPerAllocBlk) ?
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((theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk) + 1) :
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(theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk);
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/* get number of 512-byte blocks needed for resource fork */
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theGlobals->tempBlocks = ((unsigned long)theGlobals->myCPB.hFileInfo.ioFlRLgLen % 512) ?
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(((unsigned long)theGlobals->myCPB.hFileInfo.ioFlRLgLen >> 9) + 1) :
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((unsigned long)theGlobals->myCPB.hFileInfo.ioFlRLgLen >> 9);
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/* now, calculate number of new allocation blocks needed */
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theGlobals->allocBlksNeeded += (theGlobals->tempBlocks % theGlobals->dstBlksPerAllocBlk) ?
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((theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk) + 1) :
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(theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk);
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}
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}
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}
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++index;
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} while ( theGlobals->result == noErr );
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}
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/*****************************************************************************/
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static OSErr PreflightDirectoryCopySpace(short srcVRefNum,
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long srcDirID,
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short dstVRefNum,
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CopyFilterProcPtr copyFilterProc,
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Boolean *spaceOK)
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{
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HParamBlockRec pb;
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OSErr error;
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unsigned short dstFreeBlocks;
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PreflightGlobals theGlobals;
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/* Get the number of 512 byte blocks per allocation block and */
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/* number of free allocation blocks on the destination volume */
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error = GetVolumeInfoNoName(NULL, dstVRefNum, &pb);
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if ( error == noErr )
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{
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dstFreeBlocks = (unsigned short)pb.volumeParam.ioVFrBlk;
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/* get allocation block size (always multiple of 512) and divide by 512
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to get number of 512-byte blocks per allocation block */
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theGlobals.dstBlksPerAllocBlk = ((unsigned long)pb.volumeParam.ioVAlBlkSiz >> 9);
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theGlobals.allocBlksNeeded = 0;
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theGlobals.myCPB.dirInfo.ioNamePtr = theGlobals.itemName;
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theGlobals.myCPB.dirInfo.ioVRefNum = srcVRefNum;
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theGlobals.copyFilterProc = copyFilterProc;
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GetLevelSize(srcDirID, &theGlobals);
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/* Is there enough room on the destination volume for the source file? */
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*spaceOK = (theGlobals.allocBlksNeeded <= dstFreeBlocks);
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}
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return ( error );
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}
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/*****************************************************************************/
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static void CopyLevel(long sourceDirID,
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long dstDirID,
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EnumerateGlobalsPtr theGlobals)
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{
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long currentSrcDirID;
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long newDirID;
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short index = 1;
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do
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{
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/* Get next source item at the current directory level */
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theGlobals->myCPB.dirInfo.ioFDirIndex = index;
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theGlobals->myCPB.dirInfo.ioDrDirID = sourceDirID;
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theGlobals->error = PBGetCatInfoSync(&theGlobals->myCPB);
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if ( theGlobals->error == noErr )
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{
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if ( (theGlobals->copyFilterProc == NULL) ||
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CallCopyFilterProc(theGlobals->copyFilterProc, &theGlobals->myCPB) ) /* filter if filter proc was supplied */
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{
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/* Either there's no filter proc OR the filter proc says to use this item */
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/* We have an item. Is it a file or directory? */
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if ( (theGlobals->myCPB.hFileInfo.ioFlAttrib & ioDirMask) != 0 )
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{
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/* We have a directory */
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/* Create a new directory at the destination. No errors allowed! */
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theGlobals->error = DirCreate(theGlobals->destinationVRefNum, dstDirID, theGlobals->itemName, &newDirID);
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if ( theGlobals->error == noErr )
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{
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/* Save the current source directory ID where we can get it when we come back
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** from recursion land. */
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currentSrcDirID = theGlobals->myCPB.dirInfo.ioDrDirID;
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/* Dive again (copy the directory level we just found below this one) */
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CopyLevel(theGlobals->myCPB.dirInfo.ioDrDirID, newDirID, theGlobals);
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if ( !theGlobals->bailout )
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{
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/* Copy comment from old to new directory. */
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/* Ignore the result because we really don't care if it worked or not. */
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(void) DTCopyComment(theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL, theGlobals->destinationVRefNum, newDirID, NULL);
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/* Copy directory attributes (dates, etc.) to newDirID. */
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/* No errors allowed */
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theGlobals->error = CopyFileMgrAttributes(theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL, theGlobals->destinationVRefNum, newDirID, NULL, true);
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/* handle any errors from CopyFileMgrAttributes */
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if ( theGlobals->error != noErr )
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{
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if ( theGlobals->errorHandler != NULL )
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{
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theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, copyDirFMAttributesOp,
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theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL,
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theGlobals->destinationVRefNum, newDirID, NULL);
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}
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else
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{
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/* If you don't handle the errors with an error handler, */
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/* then the copy stops here. */
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theGlobals->bailout = true;
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}
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}
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}
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}
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else /* error handling for DirCreate */
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{
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if ( theGlobals->errorHandler != NULL )
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{
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theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, dirCreateOp,
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theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL,
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theGlobals->destinationVRefNum, dstDirID, theGlobals->itemName);
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}
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else
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{
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/* If you don't handle the errors with an error handler, */
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/* then the copy stops here. */
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theGlobals->bailout = true;
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}
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}
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if ( !theGlobals->bailout )
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{
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/* clear error return on way back if we aren't bailing out */
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theGlobals->error = noErr;
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}
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}
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else
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{
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/* We have a file, so copy it */
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theGlobals->error = FileCopy(theGlobals->myCPB.hFileInfo.ioVRefNum,
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theGlobals->myCPB.hFileInfo.ioFlParID,
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theGlobals->itemName,
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theGlobals->destinationVRefNum,
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dstDirID,
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NULL,
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NULL,
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theGlobals->copyBuffer,
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theGlobals->bufferSize,
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false);
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/* handle any errors from FileCopy */
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if ( theGlobals->error != noErr )
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{
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if ( theGlobals->errorHandler != NULL )
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{
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theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, fileCopyOp,
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theGlobals->myCPB.hFileInfo.ioVRefNum, theGlobals->myCPB.hFileInfo.ioFlParID, theGlobals->itemName,
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theGlobals->destinationVRefNum, dstDirID, NULL);
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if ( !theGlobals->bailout )
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{
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/* If the CopyErrProc handled the problem, clear the error here */
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theGlobals->error = noErr;
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}
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}
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else
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{
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/* If you don't handle the errors with an error handler, */
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/* then the copy stops here. */
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theGlobals->bailout = true;
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}
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}
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}
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}
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}
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else
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{ /* error handling for PBGetCatInfo */
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/* it's normal to get a fnfErr when indexing; that only means you've hit the end of the directory */
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if ( theGlobals->error != fnfErr )
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{
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if ( theGlobals->errorHandler != NULL )
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{
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theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, getNextItemOp,
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theGlobals->myCPB.dirInfo.ioVRefNum, sourceDirID, NULL, 0, 0, NULL);
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if ( !theGlobals->bailout )
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{
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/* If the CopyErrProc handled the problem, clear the error here */
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theGlobals->error = noErr;
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}
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}
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else
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{
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/* If you don't handle the errors with an error handler, */
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/* then the copy stops here. */
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theGlobals->bailout = true;
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}
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}
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}
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++index; /* prepare to get next item */
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} while ( (theGlobals->error == noErr) && (!theGlobals->bailout) ); /* time to fall back a level? */
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}
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/*****************************************************************************/
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pascal OSErr FilteredDirectoryCopy(short srcVRefNum,
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long srcDirID,
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StringPtr srcName,
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short dstVRefNum,
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long dstDirID,
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StringPtr dstName,
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void *copyBufferPtr,
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long copyBufferSize,
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Boolean preflight,
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CopyErrProcPtr copyErrHandler,
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CopyFilterProcPtr copyFilterProc)
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{
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EnumerateGlobals theGlobals;
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Boolean isDirectory;
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OSErr error;
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Boolean ourCopyBuffer = false;
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Str63 srcDirName, oldDiskName;
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Boolean spaceOK;
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/* Make sure a copy buffer is allocated. */
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if ( copyBufferPtr == NULL )
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{
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/* The caller didn't supply a copy buffer so grab one from the application heap.
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** Try to get a big copy buffer, if we can't, try for a 512-byte buffer.
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** If 512 bytes aren't available, we're in trouble. */
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copyBufferSize = dirCopyBigCopyBuffSize;
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copyBufferPtr = NewPtr(copyBufferSize);
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if ( copyBufferPtr == NULL )
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{
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copyBufferSize = dirCopyMinCopyBuffSize;
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copyBufferPtr = NewPtr(copyBufferSize);
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if ( copyBufferPtr == NULL )
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return ( memFullErr );
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}
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ourCopyBuffer = true;
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}
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/* Get the real dirID where we're copying from and make sure it is a directory. */
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error = GetDirectoryID(srcVRefNum, srcDirID, srcName, &srcDirID, &isDirectory);
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if ( error != noErr )
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goto ErrorExit;
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if ( !isDirectory )
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{
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error = dirNFErr;
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goto ErrorExit;
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}
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/* Special case destination if it is the root parent directory. */
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/* Since you can't create the root directory, this is needed if */
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/* you want to copy a directory's content to a disk's root directory. */
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if ( (dstDirID == fsRtParID) && (dstName == NULL) )
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{
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dstDirID = fsRtParID;
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isDirectory = true;
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error = noErr;
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}
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else
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{
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/* Get the real dirID where we're going to put the copy and make sure it is a directory. */
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error = GetDirectoryID(dstVRefNum, dstDirID, dstName, &dstDirID, &isDirectory);
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if ( error != noErr )
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goto ErrorExit;
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if ( !isDirectory )
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{
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error = dirNFErr;
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goto ErrorExit;
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}
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}
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/* Get the real vRefNum of both the source and destination */
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error = DetermineVRefNum(srcName, srcVRefNum, &srcVRefNum);
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if ( error != noErr )
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goto ErrorExit;
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error = DetermineVRefNum(dstName, dstVRefNum, &dstVRefNum);
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if ( error != noErr )
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goto ErrorExit;
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if ( preflight )
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{
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error = PreflightDirectoryCopySpace(srcVRefNum, srcDirID, dstVRefNum, copyFilterProc, &spaceOK);
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if ( error != noErr )
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goto ErrorExit;
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if ( !spaceOK )
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{
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error = dskFulErr; /* not enough room on destination */
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goto ErrorExit;
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}
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}
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/* Create the new directory in the destination directory with the */
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/* same name as the source directory. */
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error = GetDirName(srcVRefNum, srcDirID, srcDirName);
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if ( error != noErr )
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goto ErrorExit;
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/* Again, special case destination if the destination is the */
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/* root parent directory. This time, we'll rename the disk to */
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/* the source directory name. */
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if ( dstDirID == fsRtParID )
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{
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/* Get the current name of the destination disk */
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error = GetDirName(dstVRefNum, fsRtDirID, oldDiskName);
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if ( error == noErr )
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{
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/* Shorten the name if it's too long to be the volume name */
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TruncPString(srcDirName, srcDirName, 27);
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/* Rename the disk */
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error = HRename(dstVRefNum, fsRtParID, oldDiskName, srcDirName);
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/* and copy to the root directory */
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dstDirID = fsRtDirID;
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}
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}
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else
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{
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error = DirCreate(dstVRefNum, dstDirID, srcDirName, &dstDirID);
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}
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if ( error != noErr )
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{
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/* handle any errors from DirCreate */
|
|
if ( copyErrHandler != NULL )
|
|
{
|
|
if ( CallCopyErrProc(copyErrHandler, error, dirCreateOp,
|
|
srcVRefNum, srcDirID, NULL,
|
|
dstVRefNum, dstDirID, srcDirName) )
|
|
{
|
|
goto ErrorExit;
|
|
}
|
|
else
|
|
{
|
|
/* If the CopyErrProc handled the problem, clear the error here */
|
|
/* and continue */
|
|
error = noErr;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* If you don't handle the errors with an error handler, */
|
|
/* then the copy stops here. */
|
|
goto ErrorExit;
|
|
}
|
|
}
|
|
|
|
/* dstDirID is now the newly created directory! */
|
|
|
|
/* Set up the globals we need to access from the recursive routine. */
|
|
theGlobals.copyBuffer = (Ptr)copyBufferPtr;
|
|
theGlobals.bufferSize = copyBufferSize;
|
|
theGlobals.destinationVRefNum = dstVRefNum; /* so we can get to it always */
|
|
theGlobals.myCPB.hFileInfo.ioNamePtr = (StringPtr)&theGlobals.itemName;
|
|
theGlobals.myCPB.hFileInfo.ioVRefNum = srcVRefNum;
|
|
theGlobals.errorHandler = copyErrHandler;
|
|
theGlobals.bailout = false;
|
|
theGlobals.copyFilterProc = copyFilterProc;
|
|
|
|
/* Here we go into recursion land... */
|
|
CopyLevel(srcDirID, dstDirID, &theGlobals);
|
|
error = theGlobals.error; /* get the result */
|
|
|
|
if ( !theGlobals.bailout )
|
|
{
|
|
/* Copy comment from source to destination directory. */
|
|
/* Ignore the result because we really don't care if it worked or not. */
|
|
(void) DTCopyComment(srcVRefNum, srcDirID, NULL, dstVRefNum, dstDirID, NULL);
|
|
|
|
/* Copy the File Manager attributes */
|
|
error = CopyFileMgrAttributes(srcVRefNum, srcDirID, NULL,
|
|
dstVRefNum, dstDirID, NULL, true);
|
|
|
|
/* handle any errors from CopyFileMgrAttributes */
|
|
if ( (error != noErr) && (copyErrHandler != NULL) )
|
|
theGlobals.bailout = CallCopyErrProc(copyErrHandler, error, copyDirFMAttributesOp,
|
|
srcVRefNum, srcDirID, NULL,
|
|
dstVRefNum, dstDirID, NULL);
|
|
}
|
|
|
|
ErrorExit:
|
|
/* Get rid of the copy buffer if we allocated it. */
|
|
if ( ourCopyBuffer )
|
|
DisposePtr((Ptr)copyBufferPtr);
|
|
|
|
return ( error );
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
pascal OSErr DirectoryCopy(short srcVRefNum,
|
|
long srcDirID,
|
|
StringPtr srcName,
|
|
short dstVRefNum,
|
|
long dstDirID,
|
|
StringPtr dstName,
|
|
void *copyBufferPtr,
|
|
long copyBufferSize,
|
|
Boolean preflight,
|
|
CopyErrProcPtr copyErrHandler)
|
|
{
|
|
return ( FilteredDirectoryCopy(srcVRefNum, srcDirID, srcName,
|
|
dstVRefNum, dstDirID, dstName,
|
|
copyBufferPtr, copyBufferSize, preflight,
|
|
copyErrHandler, NULL) );
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
pascal OSErr FSpFilteredDirectoryCopy(const FSSpec *srcSpec,
|
|
const FSSpec *dstSpec,
|
|
void *copyBufferPtr,
|
|
long copyBufferSize,
|
|
Boolean preflight,
|
|
CopyErrProcPtr copyErrHandler,
|
|
CopyFilterProcPtr copyFilterProc)
|
|
{
|
|
return ( FilteredDirectoryCopy(srcSpec->vRefNum, srcSpec->parID, (StringPtr)srcSpec->name,
|
|
dstSpec->vRefNum, dstSpec->parID, (StringPtr)dstSpec->name,
|
|
copyBufferPtr, copyBufferSize, preflight,
|
|
copyErrHandler, copyFilterProc) );
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
pascal OSErr FSpDirectoryCopy(const FSSpec *srcSpec,
|
|
const FSSpec *dstSpec,
|
|
void *copyBufferPtr,
|
|
long copyBufferSize,
|
|
Boolean preflight,
|
|
CopyErrProcPtr copyErrHandler)
|
|
{
|
|
return ( FilteredDirectoryCopy(srcSpec->vRefNum, srcSpec->parID, (StringPtr)srcSpec->name,
|
|
dstSpec->vRefNum, dstSpec->parID, (StringPtr)dstSpec->name,
|
|
copyBufferPtr, copyBufferSize, preflight,
|
|
copyErrHandler, NULL) );
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|