#include "lib9.h"#include "logfs.h"#include "nandfs.h"#include "nandecc.h"#include "local.h" char *nandfsreadpage(Nandfs *nandfs, void *buf, NandfsTags *tags, long block, int page, int reportbad, LogfsLowLevelReadResult *result){	ulong ecc1, ecc2, storedecc1, storedecc2;	NandEccError e1, e2;	ulong rawoffset;	NandfsAuxiliary hdr;	char *errmsg; 	rawoffset = nandfs->rawblocksize * (nandfs->baseblock + block) + NandfsFullSize * page;	errmsg = (*nandfs->read)(nandfs->magic, buf, NandfsPageSize, rawoffset);	if (errmsg)		return errmsg;	errmsg = (*nandfs->read)(nandfs->magic, &hdr, sizeof(hdr), rawoffset + NandfsPageSize);	if (errmsg)		return errmsg;	ecc1 = nandecc(buf);	ecc2 = nandecc((uchar *)buf + 256);	storedecc1 = getlittle3(hdr.ecc1);	storedecc2 = getlittle3(hdr.ecc2);	e1 = nandecccorrect(buf, ecc1, &storedecc1, reportbad);	e2 = nandecccorrect((uchar *)buf + 256, ecc2, &storedecc2, reportbad);	if (e1 == NandEccErrorBad || e2 == NandEccErrorBad)		*result = LogfsLowLevelReadResultHardError;	else if (e1 != NandEccErrorGood || e2 != NandEccErrorGood)		*result = LogfsLowLevelReadResultSoftError;	else		*result = LogfsLowLevelReadResultOk;	if (tags) {		*result = _nandfscorrectauxiliary(&hdr);		_nandfsextracttags(&hdr, tags);	}	return nil;} char *nandfsreadpagerange(Nandfs *nandfs, void *buf, long block, int page, int offset, int count, LogfsLowLevelReadResult *result){	char *errmsg;	uchar tmpbuf[NandfsPageSize];	errmsg = nandfsreadpage(nandfs, tmpbuf, nil, block, page, 1, result);	if (errmsg == nil)		memcpy(buf, tmpbuf + offset, count);	return errmsg;}