yaffs_packedtags.c

YAFFS的升级版本YAFFS2

#include "yaffs_packedtags.h"
#include <string.h>

void yaffs_PackTags(yaffs_PackedTags *pt, yaffs_ExtendedTags *t)
{
	pt->chunkId = t->chunkId;
	pt->serialNumber = t->serialNumber;
	pt->byteCount = t->byteCount;
	pt->objectId = t->objectId;
	pt->ecc = 0;
	pt->deleted = (t->chunkDeleted) ? 0 : 1;
	pt->unusedStuff = 0;
	pt->shouldBeFF = 0xFFFFFFFF;
	
}

void yaffs_UnpackTags(yaffs_ExtendedTags *t, yaffs_PackedTags *pt)
{
	static __u8 allFF[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,0xff, 0xff, 0xff, 0xff};
	
	if(memcmp(allFF,pt,sizeof(yaffs_PackedTags)))
	{
		t->blockBad = 0;
		if(pt->shouldBeFF != 0xFFFFFFFF)
		{
			t->blockBad = 1;
		}
		t->chunkUsed = 1;
		t->objectId = pt->objectId;
		t->chunkId = pt->chunkId;
		t->byteCount = pt->byteCount;
		t->eccResult = 	YAFFS_ECC_RESULT_NO_ERROR;
		t->chunkDeleted = (pt->deleted) ? 0 : 1;
		t->serialNumber = pt->serialNumber;
	}
	else
	{
		memset(t,0,sizeof(yaffs_ExtendedTags));
		
	}
}