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pjs/lib/mac/MoreFiles/DirectoryCopy.c

654 строки
21 KiB
C
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/*
** Apple Macintosh Developer Technical Support
**
** DirectoryCopy: A robust, general purpose directory copy routine.
**
** by Jim Luther, Apple Developer Technical Support Emeritus
**
** File: DirectoryCopy.c
**
** Copyright © 1992-1998 Apple Computer, Inc.
** All rights reserved.
**
** You may incorporate this sample code into your applications without
** restriction, though the sample code has been provided "AS IS" and the
** responsibility for its operation is 100% yours. However, what you are
** not permitted to do is to redistribute the source as "DSC Sample Code"
** after having made changes. If you're going to re-distribute the source,
** we require that you make it clear in the source that the code was
** descended from Apple Sample Code, but that you've made changes.
*/
#include <Types.h>
#include <Errors.h>
#include <Memory.h>
#include <Files.h>
#include <Script.h>
#define __COMPILINGMOREFILES
#include "MoreFiles.h"
#include "MoreFilesExtras.h"
#include "MoreDesktopMgr.h"
#include "FileCopy.h"
#include "DirectoryCopy.h"
/*****************************************************************************/
/* local constants */
enum
{
dirCopyBigCopyBuffSize = 0x00004000,
dirCopyMinCopyBuffSize = 0x00000200
};
/*****************************************************************************/
/* local data structures */
/* The EnumerateGlobals structure is used to minimize the amount of
** stack space used when recursively calling CopyLevel and to hold
** global information that might be needed at any time. */
#if PRAGMA_ALIGN_SUPPORTED
#pragma options align=mac68k
#endif
struct EnumerateGlobals
{
Ptr copyBuffer; /* pointer to buffer used for file copy operations */
long bufferSize; /* the size of the copy buffer */
CopyErrProcPtr errorHandler; /* pointer to error handling function */
CopyFilterProcPtr copyFilterProc; /* pointer to filter function */
OSErr error; /* temporary holder of results - saves 2 bytes of stack each level */
Boolean bailout; /* set to true to by error handling function if fatal error */
short destinationVRefNum; /* the destination vRefNum */
Str63 itemName; /* the name of the current item */
CInfoPBRec myCPB; /* the parameter block used for PBGetCatInfo calls */
};
#if PRAGMA_ALIGN_SUPPORTED
#pragma options align=reset
#endif
typedef struct EnumerateGlobals EnumerateGlobals;
typedef EnumerateGlobals *EnumerateGlobalsPtr;
/* The PreflightGlobals structure is used to minimize the amount of
** stack space used when recursively calling GetLevelSize and to hold
** global information that might be needed at any time. */
#if PRAGMA_ALIGN_SUPPORTED
#pragma options align=mac68k
#endif
struct PreflightGlobals
{
OSErr result; /* temporary holder of results - saves 2 bytes of stack each level */
Str63 itemName; /* the name of the current item */
CInfoPBRec myCPB; /* the parameter block used for PBGetCatInfo calls */
unsigned long dstBlksPerAllocBlk; /* the number of 512 byte blocks per allocation block on destination */
unsigned long allocBlksNeeded; /* the total number of allocation blocks needed */
unsigned long tempBlocks; /* temporary storage for calculations (save some stack space) */
CopyFilterProcPtr copyFilterProc; /* pointer to filter function */
};
#if PRAGMA_ALIGN_SUPPORTED
#pragma options align=reset
#endif
typedef struct PreflightGlobals PreflightGlobals;
typedef PreflightGlobals *PreflightGlobalsPtr;
/*****************************************************************************/
/* static prototypes */
static void GetLevelSize(long currentDirID,
PreflightGlobals *theGlobals);
static OSErr PreflightDirectoryCopySpace(short srcVRefNum,
long srcDirID,
short dstVRefNum,
CopyFilterProcPtr copyFilterProc,
Boolean *spaceOK);
static void CopyLevel(long sourceDirID,
long dstDirID,
EnumerateGlobals *theGlobals);
/*****************************************************************************/
static void GetLevelSize(long currentDirID,
PreflightGlobals *theGlobals)
{
short index = 1;
do
{
theGlobals->myCPB.dirInfo.ioFDirIndex = index;
theGlobals->myCPB.dirInfo.ioDrDirID = currentDirID; /* we need to do this every time */
/* through, since GetCatInfo */
/* returns ioFlNum in this field */
theGlobals->result = PBGetCatInfoSync(&theGlobals->myCPB);
if ( theGlobals->result == noErr )
{
if ( (theGlobals->copyFilterProc == NULL) ||
CallCopyFilterProc(theGlobals->copyFilterProc, &theGlobals->myCPB) ) /* filter if filter proc was supplied */
{
/* Either there's no filter proc OR the filter proc says to use this item */
if ( (theGlobals->myCPB.dirInfo.ioFlAttrib & ioDirMask) != 0 )
{
/* we have a directory */
GetLevelSize(theGlobals->myCPB.dirInfo.ioDrDirID, theGlobals); /* recurse */
theGlobals->result = noErr; /* clear error return on way back */
}
else
{
/* We have a file - add its allocation blocks to allocBlksNeeded. */
/* Since space on Mac OS disks is always allocated in allocation blocks, */
/* this takes into account rounding up to the end of an allocation block. */
/* get number of 512-byte blocks needed for data fork */
if ( ((unsigned long)theGlobals->myCPB.hFileInfo.ioFlLgLen & 0x000001ff) != 0 )
{
theGlobals->tempBlocks = ((unsigned long)theGlobals->myCPB.hFileInfo.ioFlLgLen >> 9) + 1;
}
else
{
theGlobals->tempBlocks = (unsigned long)theGlobals->myCPB.hFileInfo.ioFlLgLen >> 9;
}
/* now, calculate number of new allocation blocks needed for the data fork and add it to the total */
if ( theGlobals->tempBlocks % theGlobals->dstBlksPerAllocBlk )
{
theGlobals->allocBlksNeeded += (theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk) + 1;
}
else
{
theGlobals->allocBlksNeeded += theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk;
}
/* get number of 512-byte blocks needed for resource fork */
if ( ((unsigned long)theGlobals->myCPB.hFileInfo.ioFlRLgLen & 0x000001ff) != 0 )
{
theGlobals->tempBlocks = ((unsigned long)theGlobals->myCPB.hFileInfo.ioFlRLgLen >> 9) + 1;
}
else
{
theGlobals->tempBlocks = (unsigned long)theGlobals->myCPB.hFileInfo.ioFlRLgLen >> 9;
}
/* now, calculate number of new allocation blocks needed for the resource fork and add it to the total */
if ( theGlobals->tempBlocks % theGlobals->dstBlksPerAllocBlk )
{
theGlobals->allocBlksNeeded += (theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk) + 1;
}
else
{
theGlobals->allocBlksNeeded += theGlobals->tempBlocks / theGlobals->dstBlksPerAllocBlk;
}
}
}
}
++index;
} while ( theGlobals->result == noErr );
}
/*****************************************************************************/
static OSErr PreflightDirectoryCopySpace(short srcVRefNum,
long srcDirID,
short dstVRefNum,
CopyFilterProcPtr copyFilterProc,
Boolean *spaceOK)
{
XVolumeParam pb;
OSErr error;
unsigned long dstFreeBlocks;
PreflightGlobals theGlobals;
error = XGetVolumeInfoNoName(NULL, dstVRefNum, &pb);
if ( error == noErr )
{
/* Convert freeBytes to free disk blocks (512-byte blocks) */
dstFreeBlocks = (pb.ioVFreeBytes.hi << 23) + (pb.ioVFreeBytes.lo >> 9);
/* get allocation block size (always multiple of 512) and divide by 512
to get number of 512-byte blocks per allocation block */
theGlobals.dstBlksPerAllocBlk = ((unsigned long)pb.ioVAlBlkSiz >> 9);
theGlobals.allocBlksNeeded = 0;
theGlobals.myCPB.dirInfo.ioNamePtr = theGlobals.itemName;
theGlobals.myCPB.dirInfo.ioVRefNum = srcVRefNum;
theGlobals.copyFilterProc = copyFilterProc;
GetLevelSize(srcDirID, &theGlobals);
/* Is there enough room on the destination volume for the source file? */
/* Note: This will work because the largest number of disk blocks supported */
/* on a 2TB volume is 0xffffffff and (allocBlksNeeded * dstBlksPerAllocBlk) */
/* will always be less than 0xffffffff. */
*spaceOK = ((theGlobals.allocBlksNeeded * theGlobals.dstBlksPerAllocBlk) <= dstFreeBlocks);
}
return ( error );
}
/*****************************************************************************/
static void CopyLevel(long sourceDirID,
long dstDirID,
EnumerateGlobals *theGlobals)
{
long currentSrcDirID;
long newDirID;
short index = 1;
do
{
/* Get next source item at the current directory level */
theGlobals->myCPB.dirInfo.ioFDirIndex = index;
theGlobals->myCPB.dirInfo.ioDrDirID = sourceDirID;
theGlobals->error = PBGetCatInfoSync(&theGlobals->myCPB);
if ( theGlobals->error == noErr )
{
if ( (theGlobals->copyFilterProc == NULL) ||
CallCopyFilterProc(theGlobals->copyFilterProc, &theGlobals->myCPB) ) /* filter if filter proc was supplied */
{
/* Either there's no filter proc OR the filter proc says to use this item */
/* We have an item. Is it a file or directory? */
if ( (theGlobals->myCPB.hFileInfo.ioFlAttrib & ioDirMask) != 0 )
{
/* We have a directory */
/* Create a new directory at the destination. No errors allowed! */
theGlobals->error = DirCreate(theGlobals->destinationVRefNum, dstDirID, theGlobals->itemName, &newDirID);
if ( theGlobals->error == noErr )
{
/* Save the current source directory ID where we can get it when we come back
** from recursion land. */
currentSrcDirID = theGlobals->myCPB.dirInfo.ioDrDirID;
/* Dive again (copy the directory level we just found below this one) */
CopyLevel(theGlobals->myCPB.dirInfo.ioDrDirID, newDirID, theGlobals);
if ( !theGlobals->bailout )
{
/* Copy comment from old to new directory. */
/* Ignore the result because we really don't care if it worked or not. */
(void) DTCopyComment(theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL, theGlobals->destinationVRefNum, newDirID, NULL);
/* Copy directory attributes (dates, etc.) to newDirID. */
/* No errors allowed */
theGlobals->error = CopyFileMgrAttributes(theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL, theGlobals->destinationVRefNum, newDirID, NULL, true);
/* handle any errors from CopyFileMgrAttributes */
if ( theGlobals->error != noErr )
{
if ( theGlobals->errorHandler != NULL )
{
theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, copyDirFMAttributesOp,
theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL,
theGlobals->destinationVRefNum, newDirID, NULL);
}
else
{
/* If you don't handle the errors with an error handler, */
/* then the copy stops here. */
theGlobals->bailout = true;
}
}
}
}
else /* error handling for DirCreate */
{
if ( theGlobals->errorHandler != NULL )
{
theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, dirCreateOp,
theGlobals->myCPB.dirInfo.ioVRefNum, currentSrcDirID, NULL,
theGlobals->destinationVRefNum, dstDirID, theGlobals->itemName);
}
else
{
/* If you don't handle the errors with an error handler, */
/* then the copy stops here. */
theGlobals->bailout = true;
}
}
if ( !theGlobals->bailout )
{
/* clear error return on way back if we aren't bailing out */
theGlobals->error = noErr;
}
}
else
{
/* We have a file, so copy it */
theGlobals->error = FileCopy(theGlobals->myCPB.hFileInfo.ioVRefNum,
theGlobals->myCPB.hFileInfo.ioFlParID,
theGlobals->itemName,
theGlobals->destinationVRefNum,
dstDirID,
NULL,
NULL,
theGlobals->copyBuffer,
theGlobals->bufferSize,
false);
/* handle any errors from FileCopy */
if ( theGlobals->error != noErr )
{
if ( theGlobals->errorHandler != NULL )
{
theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, fileCopyOp,
theGlobals->myCPB.hFileInfo.ioVRefNum, theGlobals->myCPB.hFileInfo.ioFlParID, theGlobals->itemName,
theGlobals->destinationVRefNum, dstDirID, NULL);
if ( !theGlobals->bailout )
{
/* If the CopyErrProc handled the problem, clear the error here */
theGlobals->error = noErr;
}
}
else
{
/* If you don't handle the errors with an error handler, */
/* then the copy stops here. */
theGlobals->bailout = true;
}
}
}
}
}
else
{ /* error handling for PBGetCatInfo */
/* it's normal to get a fnfErr when indexing; that only means you've hit the end of the directory */
if ( theGlobals->error != fnfErr )
{
if ( theGlobals->errorHandler != NULL )
{
theGlobals->bailout = CallCopyErrProc(theGlobals->errorHandler, theGlobals->error, getNextItemOp,
theGlobals->myCPB.dirInfo.ioVRefNum, sourceDirID, NULL, 0, 0, NULL);
if ( !theGlobals->bailout )
{
/* If the CopyErrProc handled the problem, clear the error here */
theGlobals->error = noErr;
}
}
else
{
/* If you don't handle the errors with an error handler, */
/* then the copy stops here. */
theGlobals->bailout = true;
}
}
}
++index; /* prepare to get next item */
} while ( (theGlobals->error == noErr) && (!theGlobals->bailout) ); /* time to fall back a level? */
}
/*****************************************************************************/
pascal OSErr FilteredDirectoryCopy(short srcVRefNum,
long srcDirID,
ConstStr255Param srcName,
short dstVRefNum,
long dstDirID,
ConstStr255Param dstName,
void *copyBufferPtr,
long copyBufferSize,
Boolean preflight,
CopyErrProcPtr copyErrHandler,
CopyFilterProcPtr copyFilterProc)
{
EnumerateGlobals theGlobals;
Boolean isDirectory;
OSErr error;
Boolean ourCopyBuffer = false;
Str63 srcDirName, oldDiskName;
Boolean spaceOK;
/* Make sure a copy buffer is allocated. */
if ( copyBufferPtr == NULL )
{
/* The caller didn't supply a copy buffer so grab one from the application heap.
** Try to get a big copy buffer, if we can't, try for a 512-byte buffer.
** If 512 bytes aren't available, we're in trouble. */
copyBufferSize = dirCopyBigCopyBuffSize;
copyBufferPtr = NewPtr(copyBufferSize);
if ( copyBufferPtr == NULL )
{
copyBufferSize = dirCopyMinCopyBuffSize;
copyBufferPtr = NewPtr(copyBufferSize);
if ( copyBufferPtr == NULL )
{
return ( memFullErr );
}
}
ourCopyBuffer = true;
}
/* Get the real dirID where we're copying from and make sure it is a directory. */
error = GetDirectoryID(srcVRefNum, srcDirID, srcName, &srcDirID, &isDirectory);
if ( error != noErr )
{
goto ErrorExit;
}
if ( !isDirectory )
{
error = dirNFErr;
goto ErrorExit;
}
/* Special case destination if it is the root parent directory. */
/* Since you can't create the root directory, this is needed if */
/* you want to copy a directory's content to a disk's root directory. */
if ( (dstDirID == fsRtParID) && (dstName == NULL) )
{
dstDirID = fsRtParID;
isDirectory = true;
error = noErr;
}
else
{
/* Get the real dirID where we're going to put the copy and make sure it is a directory. */
error = GetDirectoryID(dstVRefNum, dstDirID, dstName, &dstDirID, &isDirectory);
if ( error != noErr )
{
goto ErrorExit;
}
if ( !isDirectory )
{
error = dirNFErr;
goto ErrorExit;
}
}
/* Get the real vRefNum of both the source and destination */
error = DetermineVRefNum(srcName, srcVRefNum, &srcVRefNum);
if ( error != noErr )
{
goto ErrorExit;
}
error = DetermineVRefNum(dstName, dstVRefNum, &dstVRefNum);
if ( error != noErr )
{
goto ErrorExit;
}
if ( preflight )
{
error = PreflightDirectoryCopySpace(srcVRefNum, srcDirID, dstVRefNum, copyFilterProc, &spaceOK);
if ( error != noErr )
{
goto ErrorExit;
}
if ( !spaceOK )
{
error = dskFulErr; /* not enough room on destination */
goto ErrorExit;
}
}
/* Create the new directory in the destination directory with the */
/* same name as the source directory. */
error = GetDirName(srcVRefNum, srcDirID, srcDirName);
if ( error != noErr )
{
goto ErrorExit;
}
/* Again, special case destination if the destination is the */
/* root parent directory. This time, we'll rename the disk to */
/* the source directory name. */
if ( dstDirID == fsRtParID )
{
/* Get the current name of the destination disk */
error = GetDirName(dstVRefNum, fsRtDirID, oldDiskName);
if ( error == noErr )
{
/* Shorten the name if it's too long to be the volume name */
TruncPString(srcDirName, srcDirName, 27);
/* Rename the disk */
error = HRename(dstVRefNum, fsRtParID, oldDiskName, srcDirName);
/* and copy to the root directory */
dstDirID = fsRtDirID;
}
}
else
{
error = DirCreate(dstVRefNum, dstDirID, srcDirName, &dstDirID);
}
if ( error != noErr )
{
/* 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,
ConstStr255Param srcName,
short dstVRefNum,
long dstDirID,
ConstStr255Param 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, srcSpec->name,
dstSpec->vRefNum, dstSpec->parID, 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, srcSpec->name,
dstSpec->vRefNum, dstSpec->parID, dstSpec->name,
copyBufferPtr, copyBufferSize, preflight,
copyErrHandler, NULL) );
}
/*****************************************************************************/
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