ResKnife/External/MoreFiles/DirectoryCopy.c

/*
	File:		DirectoryCopy.c

	Contains:	A robust, general purpose directory copy routine.

	Version:	MoreFiles

	Copyright:	<09> 1992-2001 by 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.

	File Ownership:

		DRI:				Apple Macintosh Developer Technical Support

		Other Contact:		Apple Macintosh Developer Technical Support
							<http://developer.apple.com/bugreporter/>

		Technology:			DTS Sample Code

	Writers:

		(JL)	Jim Luther

	Change History (most recent first):

		 <2>	  2/7/01	JL		Added standard header. Updated names of includes.
		<1>		12/06/99	JL		MoreFiles 1.5.
*/

#include <MacTypes.h>
#include <MacErrors.h>
#include <MacMemory.h>
#include <Files.h>
#include <Script.h>
#include <Math64.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_STRUCT_ALIGN
#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_STRUCT_ALIGN
#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_STRUCT_ALIGN
#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_STRUCT_ALIGN
#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,
											CopyFilterProc