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1343005a29c547748091a3f1ba87fec4a740467b
TempleOS-Rijn/TempleOS/Kernel/Dsk/FileSysFAT.CPP
T
Terry A. Davis 1343005a29 TempleOSTS_130707.ISO
2018-09-08 21:45:45 +02:00

1008 lines
26 KiB
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U0 CDate2Dos(U16 *t,U16 *d,CDate cdt)
{
CDateStruct ds;
Date2DateStruct(&ds,cdt+local_time_offset);
*d=ds.day_of_mon+(ds.mon+(ds.year-1980)<<4)<<5;
*t=ds.sec>>1+(ds.min+ds.hour<<6)<<5;
}
CDate Dos2CDate(U16 t,U16 d)
{
CDateStruct ds;
MemSet(&ds,0,sizeof(CDateStruct));
ds.day_of_mon=d&0x1F; d=d>>5;
ds.mon=d&0xF;
ds.year=d>>4+1980;
ds.sec=(t&0x1F)*2; t=t>>5;
ds.min=t&0x3F;
ds.hour=t>>6;
return DateStruct2Date(&ds)-local_time_offset;
}
U0 FAT32PrtInit(CPrt *p)
{
CFAT32Boot br32;
Bool unlock;
try {
unlock=PrtLock(p);
p->type=PT_FAT32;
RBlks(p,&br32,p->offset,1);
p->file_system_info_sect=p->offset+br32.file_system_info_sect;
p->map1=p->offset+br32.reserved_sects;
p->map2=p->map1+br32.sects_per_fat;
p->data=p->map2+br32.sects_per_fat-2*br32.sects_per_cluster; //Starts at Cluster 2
p->spc=br32.sects_per_cluster;
p->root_cluster=br32.root_cluster;
MapBufAlloc(p,1);
Free(p->fis);
p->fis=AMAlloc(BLK_SIZE);
RBlks(p,p->fis,p->file_system_info_sect,1);
if (unlock)
PrtUnlock(p);
} catch
if (unlock)
PrtUnlock(p);
}
Bool FAT32DrvValidate(U8 drv_let)
{
CPrt *p;
CFAT32Boot br;
Bool result=FALSE;
try {
p=Drv2Prt(drv_let);
if (p->type==PT_FAT32 &&
RBlks(p,&br,p->offset,1) &&
br.signature==0xAA55 &&
br.sects==p->size)
result=TRUE;
} catch
Fs->catch_except=TRUE;
return result;
}
U0 FAT32Fmt(U8 drv_let,Bool quick=TRUE)
{
CFAT32Boot *br=CAlloc(BLK_SIZE);
CFAT32FileInfoSect *fis=CAlloc(BLK_SIZE);
CPrt *p=Drv2Prt(drv_let);
I64 i,l;
try {
PrtLock(p);
SetDrvType(drv_let,PT_FAT32);
p->type=PT_FAT32;
br->jump_and_nop[0]=OC_JMP_REL8;
br->jump_and_nop[1]=offset(CFAT32Boot.code)-2;
br->jump_and_nop[2]=OC_NOP;
MemCpy(br->oem_name,"MSWIN4.1",8);
br->bytes_per_sect=BLK_SIZE;
if (p->size<= 500000)
br->sects_per_cluster=1;
else if (p->size<=2000000)
br->sects_per_cluster=2;
else if (p->size<=6000000)
br->sects_per_cluster=4;
else if (p->size<=12000000)
br->sects_per_cluster=8;
else if (p->size<=33000000)
br->sects_per_cluster=16;
else if (p->size<=67000000)
br->sects_per_cluster=32;
else
br->sects_per_cluster=64;
br->reserved_sects=32;
br->copies_of_fat=2;
br->media_desc=0xF8;
br->sects=p->size;
l=br->sects/br->sects_per_cluster/(BLK_SIZE/4)+1;
br->sects_per_fat=l;
br->root_cluster=2;
br->file_system_info_sect=1;
br->log_drv_num=0x80;
br->ext_signature=0x29;
br->serial_num=RandU32;
MemCpy(br->vol_name,"NO NAME ",11);
MemCpy(br->fat_name,"FAT32 ",8);
br->signature=0xAA55;
fis->signature1=0x41615252;
fis->signature2=0x61417272;
fis->free_clusters=-1;
fis->most_recently_allocated=0;
fis->signature3=0xAA550000;
if (quick)
i=br->reserved_sects+2*l+4*br->sects_per_cluster;
else
i=p->size;
WZeroBlks(p,p->offset,i);
WBlks(p,fis,p->offset+br->file_system_info_sect,1);
WBlks(p,br,p->offset,1);
FAT32PrtInit(p);
ClusersAlloc(p,0,1,FALSE); //Allocate #1
br->root_cluster=ClusersAlloc(p,0,1,FALSE);
WBlks(p,br,p->offset,1);
FAT32PrtInit(p);
PrtUnlock(p);
} catch
PrtUnlock(p);
Free(br);
Free(fis);
}
Bool FATNameTo(U8 *dst,U8 *src)
{
I64 i;
MemSet(dst,CH_SPACE,11);
if (!FileNameChk(src))
return FALSE;
if (!StrCmp(src,"..")) {
*dst='.';
dst[1]='.';
return TRUE;
} else if (!StrCmp(src,".")) {
*dst='.';
return TRUE;
}
i=0;
while (i<8 && *src && *src!='.')
dst[i++]=ToUpper(*src++);
i=8;
if (*src=='.') src++;
while (*src)
if (*src!='.')
dst[i++]=ToUpper(*src++);
else
src++;
return TRUE;
}
I64 FATNameXSum(U8 *src)
{
I64 i,result=0;
for (i=0;i<11;i++)
if (result&1)
result.u8[0]=0x80+result>>1+*src++;
else
result.u8[0]=result>>1+*src++;
return result;
}
Bool FATFromName(U8 *dst,U8 *src)
{
I64 i,j,k=0;
for (j=7;j>=0 && src[j]==CH_SPACE;j--);
for(i=0;i<=j;i++)
dst[k++]=src[i];
for (j=10;j>=8 && src[j]==CH_SPACE;j--);
if (*src!='.' && j!=7)
dst[k++]='.';
for(i=8;i<=j;i++)
dst[k++]=src[i];
dst[k++]=0;
return FileNameChk(dst);
}
U8 fat_long_name_map[13]={
offset(CFAT32DirEntryLong.name1),
offset(CFAT32DirEntryLong.name1)+2,
offset(CFAT32DirEntryLong.name1)+4,
offset(CFAT32DirEntryLong.name1)+6,
offset(CFAT32DirEntryLong.name1)+8,
offset(CFAT32DirEntryLong.name2),
offset(CFAT32DirEntryLong.name2)+2,
offset(CFAT32DirEntryLong.name2)+4,
offset(CFAT32DirEntryLong.name2)+6,
offset(CFAT32DirEntryLong.name2)+8,
offset(CFAT32DirEntryLong.name2)+10,
offset(CFAT32DirEntryLong.name3),
offset(CFAT32DirEntryLong.name3)+2
};
Bool CDirLongNameFill(CDirEntry *tempm,CFAT32DirEntryLong *de,I64 *xsum)
{
I64 i;
U8 *ptr=de;
if (de->ord&0x40) {
MemSet(tempm,0,sizeof(CDirEntry));
*xsum=de->xsum;
} else if (de->type || de->zero || de->xsum!=*xsum) {
MemSet(tempm,0,sizeof(CDirEntry));
*xsum=0;
return FALSE;
}
switch (de->ord&0x3F) {
case 1:
for (i=0;i<13;i++)
if (!(tempm->name[i]=ptr[fat_long_name_map[i]]))
return TRUE;
break;
case 2:
for (i=0;i<12;i++)
if (!(tempm->name[i+13]=ptr[fat_long_name_map[i]]))
return TRUE;
break;
}
return TRUE;
}
Bool FAT32CDirFill(CDirEntry *tempm,CFAT32DirEntry *de)
{
Bool result;
if (*tempm->name)
result=TRUE;
else
result=FATFromName(tempm->name,de->name);
tempm->cluster=de->cluster_lo+de->cluster_hi<<16;
tempm->size=de->size;
tempm->attr=de->attr;
tempm->datetime=Dos2CDate(de->WrtTime,de->WrtDate);
return result;
}
Bool FAT32DirFill(CFAT32DirEntry *de,CDirEntry *tempm,I64 *_de_cnt=NULL)
{ //Fill up to 3 entries and store cnt of entries.
I64 de_cnt=0,i,l,xsum,ord;
U8 *ptr,dname[16];
CFAT32DirEntryLong *ld=de;
Bool result;
MemSet(de,0,sizeof(CFAT32DirEntry));
result=FATNameTo(de->name,tempm->name);
FATFromName(dname,de->name);
if (StrCmp(dname,tempm->name)) {
ord=0x41;
xsum=FATNameXSum(de->name);
if ((l=StrLen(tempm->name))>13) {
ptr=&ld[de_cnt];
MemSet(ptr,0,sizeof(CFAT32DirEntryLong));
ld[de_cnt].attr=_ATTR_LONG_NAME;
ld[de_cnt].xsum=xsum;
ld[de_cnt].ord=0x42;
for (i=13;i<l;i++)
ptr[fat_long_name_map[i-13]]=tempm->name[i];
i++;
for (;i<26;i++)
ptr[fat_long_name_map[i-13]](U16)=0xFFFF;
ord=1;
l=13;
de_cnt++;
}
ptr=&de[de_cnt];
MemSet(ptr,0,sizeof(CFAT32DirEntryLong));
ld[de_cnt].attr=_ATTR_LONG_NAME;
ld[de_cnt].xsum=xsum;
ld[de_cnt].ord=ord;
for (i=0;i<l;i++)
ptr[fat_long_name_map[i]]=tempm->name[i];
i++;
for (;i<13;i++)
ptr[fat_long_name_map[i]](U16)=0xFFFF;
de_cnt++;
MemSet(&de[de_cnt],0,sizeof(CFAT32DirEntry));
result=FATNameTo(de[de_cnt].name,tempm->name);
}
de[de_cnt].cluster_lo=tempm->cluster.u16[0];
de[de_cnt].cluster_hi=tempm->cluster.u16[1];
if (!(tempm->attr&_ATTR_DIR))
de[de_cnt].size=tempm->size;
de[de_cnt].attr=tempm->attr;
if (!tempm->datetime)
tempm->datetime=GetCurTimeDate;
CDate2Dos(&de[de_cnt].WrtTime,&de[de_cnt].WrtDate,tempm->datetime);
if (_de_cnt)
*_de_cnt=de_cnt+1;
return result;
}
Bool FAT32FileFind(CPrt *p,I64 cur_dir_cluster,U8 *name,CDirEntry *_result,I64 fuf_flags=0)
{ //$LK,"FUF_JUST_DIRS","MN:FUF_JUST_DIRS"$, $LK,"FUF_JUST_FILES","MN:FUF_JUST_FILES"$
Bool result=FALSE,unlock;
CFAT32DirEntry *buf;
I64 xsum=0,attr,cur_dir_entry,entries_per_cluster;
U8 dname[CDIR_FILENAME_LEN],ch;
CDirEntry long_name;
if (fuf_flags&~FUG_FILE_FIND)
throw(EXCEPT_FUF,6);
MemSet(_result,0,sizeof(CDirEntry));
MemSet(&long_name,0,sizeof(CDirEntry));
PrtChk(p);
if (p->type!=PT_FAT32)
PutDefine("ST_NOT_FAT32");
else if (!CFileNameTo(dname,name))
PutDefine("ST_INVALID_FILENAME");
else {
try {
unlock=PrtLock(p);
buf=MAlloc(BLK_SIZE*p->spc);
entries_per_cluster=FAT32_ENTRIES_PER_BLK*p->spc;
RClusters(p,buf,cur_dir_cluster,1);
cur_dir_entry=0;
while (ch=*buf[cur_dir_entry].name) {
attr=buf[cur_dir_entry].attr;
if (ch!=0xE5) {
if (attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
CDirLongNameFill(&long_name,&buf[cur_dir_entry],&xsum);
else {
if (!(attr&_ATTR_VOL_ID)) {
if (xsum==FATNameXSum(buf[cur_dir_entry].name))
MemCpy(_result,&long_name,sizeof(CDirEntry));
else
MemSet(_result,0,sizeof(CDirEntry));
if (!(fuf_flags&FUF_JUST_DIRS && !(attr & _ATTR_DIR)) &&
!(fuf_flags&FUF_JUST_FILES && attr & _ATTR_DIR) &&
FAT32CDirFill(_result,&buf[cur_dir_entry]) &&
!StrCmp(dname,_result->name)) {
result=TRUE;
goto exit_this;
}
}
MemSet(&long_name,0,sizeof(CDirEntry));
}
} else
MemSet(&long_name,0,sizeof(CDirEntry));
if (++cur_dir_entry==entries_per_cluster) {
cur_dir_cluster=ClusterNumNext(p,cur_dir_cluster);
if (!(0<cur_dir_cluster<0x0FFFFFF8))
break;
else {
RClusters(p,buf,cur_dir_cluster,1);
cur_dir_entry=0;
}
}
}
MemSet(_result,0,sizeof(CDirEntry));
exit_this:
Free(buf);
if (unlock)
PrtUnlock(p);
} catch
if (unlock)
PrtUnlock(p);
}
return result;
}
U8 *FAT32FileRead(CPrt *p,U8 *cur_dir,U8 *filename,I64 *_size,
I64 *_attr=NULL,Bool raw,CArcCompress **_ac2)
{
U8 *buf=NULL;
CDirEntry de;
I64 c,blk_cnt,cur_dir_cluster;
CArcCompress *ac;
PrtChk(p);
if (_size) *_size=0;
if (_ac2) *_ac2=NULL;
if (_attr) *_attr=0;
if (p->type!=PT_FAT32)
PutDefine("ST_NOT_FAT32");
else {
try {
PrtLock(p);
cur_dir_cluster=Name2DirCluster(p,cur_dir);
if (FAT32FileFind(p,cur_dir_cluster,filename,&de,FUF_JUST_FILES)) {
if (_attr)
*_attr=de.attr;
blk_cnt=(de.size+BLK_SIZE-1)>>BLK_SIZE_BITS;
buf=MAlloc(blk_cnt<<BLK_SIZE_BITS+1);
c=de.cluster;
if (!(0<c<0x0FFFFFF8))
c=0x0FFFFFFF;
else
c=RClustersBlks(p,buf,c,blk_cnt);
if (FileAttr(de.name) & _ATTR_COMPRESSED && !raw) {
ac=buf;
if (_attr) *_attr=FileAttr(de.name,*_attr);
if (_size) *_size=ac->expanded_size;
if (_ac2) {
*_ac2=ac;
buf=ExpandBuf(ac);
} else {
buf=ExpandBuf(ac);
Free(ac);
}
} else {
buf[de.size]=0; //Terminate
if (_size) *_size=de.size;
}
if (_attr) *_attr=FileAttr(de.name,*_attr);
}
PrtUnlock(p);
} catch
PrtUnlock(p);
}
return buf;
}
Bool FAT32Cd(U8 *name,I64 cur_dir_cluster)
{
CDirEntry de;
if (Fs->cur_prt->type!=PT_FAT32)
PutDefine("ST_NOT_FAT32");
else {
if (FAT32FileFind(Fs->cur_prt,cur_dir_cluster,name,&de,FUF_JUST_DIRS))
return TRUE;
else {
"%s ",name;
PutDefineErr("ST_FILE_NOT_FOUND");
}
}
return FALSE;
}
U0 FAT32FreeClusters(CPrt *p,I64 c)
{
I64 next,saved_c=c;
Bool unlock,unlock_break;
PrtChk(p);
if (!(0<c<0x0FFFFFF8)) return;
if (p->type!=PT_FAT32)
PutDefine("ST_NOT_FAT32");
else {
try {
unlock_break=BreakLock;
unlock=PrtLock(p);
CleanMAPBuf(p);
do {
SetFSBuf(p,c,0);
next=p->cur_map_blk[c&(BLK_SIZE/4-1)];
p->cur_map_blk[c&(BLK_SIZE/4-1)]=0;
LBts(p->buffered_map_dirty_bits,0);
c=next;
} while (0<c<0x0FFFFFF8);
CleanMAPBuf(p,0);
c=saved_c;
do {
SetFSBuf(p,c,1);
next=p->cur_map_blk[c&(BLK_SIZE/4-1)];
p->cur_map_blk[c&(BLK_SIZE/4-1)]=0;
LBts(p->buffered_map_dirty_bits,0);
c=next;
} while (0<c<0x0FFFFFF8);
CleanMAPBuf(p,1);
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
} catch {
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
}
}
}
I64 FAT32AllocClusters(CPrt *p,I64 c,I64 cnt)
{
Bool wrap_around=FALSE,unlock,unlock_break;
I64 first=INVALID_CLUSTER,j,l;
if (cnt<=0) return 0x0FFFFFFF;
try {
unlock_break=BreakLock;
unlock=PrtLock(p);
l=(p->size+p->offset-p->data)/p->spc-1;
j=p->fis->most_recently_allocated;
while (cnt-->0) {
while (TRUE) {
j++;
if (j<1) j=1;
if (j>=l) {
if (wrap_around)
Dbg;
j=1;
wrap_around=TRUE;
}
SetFSBuf(p,j);
if (!p->cur_map_blk[j&(BLK_SIZE/4-1)])
break;
}
if (!(0<first<0x0FFFFFF8))
first=j;
if (0<c<l) {
SetFSBuf(p,c);
p->cur_map_blk[c&(BLK_SIZE/4-1)]=j;
LBts(p->buffered_map_dirty_bits,0);
}
c=j;
}
if (0<c<l) {
SetFSBuf(p,c);
p->cur_map_blk[c&(BLK_SIZE/4-1)]=0x0FFFFFFF;
LBts(p->buffered_map_dirty_bits,0);
}
CleanMAPBuf(p);
p->fis->most_recently_allocated=j;
p->fis->free_clusters=-1;
WBlks(p,p->fis,p->file_system_info_sect,1);
} catch {
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
}
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
return first;
}
I64 FAT32AllocContiguousClusters(CPrt *p,I64 cnt)
{
I64 i,first=1;
Bool cont,unlock,unlock_break;
if (cnt<=0) return 0x0FFFFFFF;
try {
unlock_break=BreakLock;
unlock=PrtLock(p);
while (TRUE) {
first++;
i=0;
cont=TRUE;
while (cont && i<cnt) {
if ((first+i+1)*p->spc+p->data>p->size+p->offset)
Dbg;
SetFSBuf(p,first+i);
if (p->cur_map_blk[(first+i)&(BLK_SIZE/4-1)])
cont=FALSE;
else
i++;
}
if (!cont)
first=first+i;
else {
CleanMAPBuf(p);
for (i=0;i<cnt;i++) {
SetFSBuf(p,first+i,0);
if (i+1==cnt)
p->cur_map_blk[(first+i)&(BLK_SIZE/4-1)]=0x0FFFFFFF;
else
p->cur_map_blk[(first+i)&(BLK_SIZE/4-1)]=first+i+1;
LBts(p->buffered_map_dirty_bits,0);
}
CleanMAPBuf(p,0);
for (i=0;i<cnt;i++) {
SetFSBuf(p,first+i,1);
if (i+1==cnt)
p->cur_map_blk[(first+i)&(BLK_SIZE/4-1)]=0x0FFFFFFF;
else
p->cur_map_blk[(first+i)&(BLK_SIZE/4-1)]=first+i+1;
LBts(p->buffered_map_dirty_bits,0);
}
CleanMAPBuf(p,1);
break;
}
}
} catch {
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
}
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
return first;
}
Bool FAT32DirNew(CPrt *p,U8 *cur_dir,CDirEntry *tempm,Bool free_old_chain)
{
//See $LK-A,"::/TempleOS/Doc/CutCorners.TXT"$.
CFAT32DirEntry *buf,*last_buf,*temp_buf,de[3];
I64 i,attr,avail_cnt,de_cnt,c,
cur_dir_entry,entries_per_cluster,
cur_dir_cluster,xsum=0,last_dir_cluster=INVALID_CLUSTER;
U8 ch;
Bool written=FALSE,unlock,unlock_break;
CDirEntry long_name;
FAT32DirFill(&de,tempm,&de_cnt);
MemSet(&long_name,0,sizeof(CDirEntry));
try {
unlock_break=BreakLock;
unlock=PrtLock(p);
cur_dir_cluster=Name2DirCluster(p,cur_dir);
buf =MAlloc(BLK_SIZE*p->spc);
last_buf=CAlloc(BLK_SIZE*p->spc);
entries_per_cluster=FAT32_ENTRIES_PER_BLK*p->spc;
RClusters(p,buf,cur_dir_cluster,1);
cur_dir_entry=0;
while (ch=*buf[cur_dir_entry].name) {
attr=buf[cur_dir_entry].attr;
if (ch!=0xE5 && attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
CDirLongNameFill(&long_name,&buf[cur_dir_entry],&xsum);
else {
avail_cnt=FAT32_ENTRIES_PER_BLK-cur_dir_entry & (FAT32_ENTRIES_PER_BLK-1);
for (i=0;i<avail_cnt;i++)
if (*buf[cur_dir_entry+i].name!=0xE5) {
if (*buf[cur_dir_entry+i].name)
avail_cnt=i;
break;
}
if (ch==0xE5 && !written && avail_cnt>=de_cnt) {
MemCpy(&buf[cur_dir_entry],&de,de_cnt*sizeof(CFAT32DirEntry));
WBlks(p,&buf[cur_dir_entry & -FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc
+cur_dir_entry/FAT32_ENTRIES_PER_BLK,1);
cur_dir_entry+=de_cnt-1; //gets inc'ed
written=TRUE;
} else if (ch!=0xE5 && !(attr&_ATTR_VOL_ID)) {
if (xsum!=FATNameXSum(buf[cur_dir_entry].name))
MemSet(&long_name,0,sizeof(CDirEntry));
if (!*long_name.name)
FATFromName(long_name.name,buf[cur_dir_entry].name);
//Del old entry with same name
if (!StrCmp(long_name.name,tempm->name)) {
if (free_old_chain)
FAT32FreeClusters(p,buf[cur_dir_entry].cluster_lo+
buf[cur_dir_entry].cluster_hi<<16);
if (!written) {
MemCpy(&buf[cur_dir_entry],&de[de_cnt-1],sizeof(CFAT32DirEntry));
WBlks(p,&buf[cur_dir_entry & -FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc
+cur_dir_entry/FAT32_ENTRIES_PER_BLK,1);
written=TRUE;
} else {
*buf[cur_dir_entry].name=0xE5;
i=1;
while (i<=cur_dir_entry &&
buf[cur_dir_entry-i].attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
*buf[cur_dir_entry-i++].name=0xE5;
i--;
WBlks(p,&buf[(cur_dir_entry-i)&-FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc
+(cur_dir_entry-i)/FAT32_ENTRIES_PER_BLK,
(i+FAT32_ENTRIES_PER_BLK)/FAT32_ENTRIES_PER_BLK);
if (i==cur_dir_entry && 0<last_dir_cluster<0x0FFFFFF8) {
i=1;
while (i<=entries_per_cluster &&
last_buf[entries_per_cluster-i].attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
*last_buf[entries_per_cluster-i++].name=0xE5;
if (--i>0)
WBlks(p,&buf[(entries_per_cluster-i)&-FAT32_ENTRIES_PER_BLK],
p->data+last_dir_cluster*p->spc
+(entries_per_cluster-i)/FAT32_ENTRIES_PER_BLK,
(i+FAT32_ENTRIES_PER_BLK-1)/FAT32_ENTRIES_PER_BLK);
}
}
break;
}
}
MemSet(&long_name,0,sizeof(CDirEntry));
}
if (++cur_dir_entry==entries_per_cluster) {
last_dir_cluster=cur_dir_cluster;
temp_buf=buf; buf=last_buf; last_buf=temp_buf;
c=ClusterNumNext(p,cur_dir_cluster);
if (!(0<c<0x0FFFFFF8)) {
c=ClusersAlloc(p,cur_dir_cluster,1,FALSE);
MemSet(buf,0,BLK_SIZE*p->spc);
WClusters(p,buf,c,1);
} else
RClusters(p,buf,c,1);
cur_dir_cluster=c;
cur_dir_entry=0;
}
}
if (!written) {
avail_cnt=FAT32_ENTRIES_PER_BLK-cur_dir_entry & (FAT32_ENTRIES_PER_BLK-1);
if (avail_cnt<de_cnt) {
for (i=0;i<avail_cnt;i++)
*buf[cur_dir_entry+i].name=0xE5;
WBlks(p,&buf[cur_dir_entry &-FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc
+cur_dir_entry/FAT32_ENTRIES_PER_BLK,1);
cur_dir_entry+=avail_cnt;
if (cur_dir_entry==entries_per_cluster) {
last_dir_cluster=cur_dir_cluster;
temp_buf=buf; buf=last_buf; last_buf=temp_buf;
cur_dir_cluster=ClusersAlloc(p,cur_dir_cluster,1);
cur_dir_entry=0;
MemSet(buf,0,BLK_SIZE*p->spc);
WClusters(p,buf,cur_dir_cluster,1);
}
}
MemCpy(&buf[cur_dir_entry],&de,de_cnt*sizeof(CFAT32DirEntry));
WBlks(p,&buf[cur_dir_entry &-FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc+
cur_dir_entry/FAT32_ENTRIES_PER_BLK,1);
cur_dir_entry+=de_cnt;
if (cur_dir_entry==entries_per_cluster) {
cur_dir_cluster=ClusersAlloc(p,cur_dir_cluster,1);
MemSet(buf,0,BLK_SIZE*p->spc);
WClusters(p,buf,cur_dir_cluster,1);
} else {
MemSet(&buf[cur_dir_entry],0,sizeof(CFAT32DirEntry));
WBlks(p,&buf[cur_dir_entry &-FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc
+cur_dir_entry/FAT32_ENTRIES_PER_BLK,1);
}
}
Free(last_buf);
Free(buf);
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
} catch {
if (unlock)
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
}
return FALSE;
}
I64 FAT32FilesDel(CPrt *p,U8 *cur_dir,U8 *files_find_mask,I64 fuf_flags,
Bool del_dir,Bool print_msg)
{
CFAT32DirEntry *buf,*last_buf,*temp_buf;
I64 i,result=0,attr,xsum=0,last_dir_cluster=INVALID_CLUSTER,
cur_dir_entry,entries_per_cluster,cur_dir_cluster;
U8 ch;
Bool unlock_break;
CDirEntry long_name;
MemSet(&long_name,0,sizeof(CDirEntry));
try {
unlock_break=BreakLock;
PrtLock(p);
cur_dir_cluster=Name2DirCluster(p,cur_dir);
buf =MAlloc(BLK_SIZE*p->spc);
last_buf=CAlloc(BLK_SIZE*p->spc);
entries_per_cluster=FAT32_ENTRIES_PER_BLK*p->spc;
RClusters(p,buf,cur_dir_cluster,1);
cur_dir_entry=0;
while (ch=*buf[cur_dir_entry].name) {
attr=buf[cur_dir_entry].attr;
if (ch!=0xE5 && ch!='.') {
if (attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
CDirLongNameFill(&long_name,&buf[cur_dir_entry],&xsum);
else {
if (!(attr & _ATTR_VOL_ID) &&
(del_dir || !(attr & _ATTR_DIR))) {
if (xsum!=FATNameXSum(buf[cur_dir_entry].name))
MemSet(&long_name,0,sizeof(CDirEntry));
if (!*long_name.name)
FATFromName(long_name.name,buf[cur_dir_entry].name);
if (FilesFindMatch(files_find_mask,long_name.name,fuf_flags)) {
if (!(attr & _ATTR_DIR)) result++;
if (print_msg) {
PutDefine("ST_DELETE");
"" long_name.name;
NewLine;
}
*buf[cur_dir_entry].name=0xE5;
i=1;
while (i<=cur_dir_entry &&
buf[cur_dir_entry-i].attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
*buf[cur_dir_entry-i++].name=0xE5;
i--;
WBlks(p,&buf[(cur_dir_entry-i)&-FAT32_ENTRIES_PER_BLK],
p->data+cur_dir_cluster*p->spc
+(cur_dir_entry-i)/FAT32_ENTRIES_PER_BLK,
(i+FAT32_ENTRIES_PER_BLK)/FAT32_ENTRIES_PER_BLK);
if (i==cur_dir_entry && last_dir_cluster!=INVALID_CLUSTER) {
i=1;
while (i<=entries_per_cluster &&
last_buf[entries_per_cluster-i].attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
*last_buf[entries_per_cluster-i++].name=0xE5;
if (--i>0)
WBlks(p,&buf[(entries_per_cluster-i)&-FAT32_ENTRIES_PER_BLK],
p->data+last_dir_cluster*p->spc
+(entries_per_cluster-i)/FAT32_ENTRIES_PER_BLK,
(i+FAT32_ENTRIES_PER_BLK-1)/FAT32_ENTRIES_PER_BLK);
}
FAT32FreeClusters(p,buf[cur_dir_entry].cluster_lo+
buf[cur_dir_entry].cluster_hi<<16);
}
}
MemSet(&long_name,0,sizeof(CDirEntry));
}
} else
MemSet(&long_name,0,sizeof(CDirEntry));
if (++cur_dir_entry==entries_per_cluster) {
last_dir_cluster=cur_dir_cluster;
cur_dir_cluster=ClusterNumNext(p,cur_dir_cluster,1);
temp_buf=buf; buf=last_buf; last_buf=temp_buf;
RClusters(p,buf,cur_dir_cluster,1);
cur_dir_entry=0;
}
}
Free(buf);
Free(last_buf);
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
} catch {
PrtUnlock(p);
if (unlock_break)
BreakUnlock;
}
return result;
}
I64 FAT32FileWrite(CPrt *p,U8 *cur_dir,U8 *name,U8 *buf,I64 size,
CDate cdt=0,I64 attr=0,Bool raw=FALSE,
CArcCompress **_ac2=NULL)
{
CDirEntry de;
I64 c=0,blk_cnt;
CArcCompress *ac=NULL;
Bool contiguous;
MemSet(&de,0,sizeof(CDirEntry));
if (_ac2) *_ac2=NULL;
if (size<0) size=0;
if (!cdt)
cdt=GetCurTimeDate;
if (p->type!=PT_FAT32)
PutDefine("ST_NOT_FAT32");
else if (!CFileNameTo(de.name,name))
PutDefine("ST_INVALID_FILENAME");
else {
FAT32FilesDel(p,cur_dir,de.name,0,FALSE,FALSE);
attr=FileAttr(name,attr);
if (attr & _ATTR_CONTIGUOUS)
contiguous=TRUE;
else
contiguous=FALSE;
if (attr & _ATTR_COMPRESSED && !raw) {
ac=CompressBuf(buf,size);
buf=ac;
size=ac->compressed_size;
}
de.size=size;
if (blk_cnt=(size+BLK_SIZE-1)>>BLK_SIZE_BITS)
c=ClusersAlloc(p,0,(blk_cnt+p->spc-1)/p->spc,contiguous);
else
c=0x0FFFFFFF;
de.cluster=c;
de.attr=attr;
de.datetime=cdt;
if (blk_cnt)
WClustersBlks(p,buf,c,blk_cnt);
FAT32DirNew(p,cur_dir,&de,TRUE);
if (_ac2)
*_ac2=ac;
else
Free(ac);
}
return c;
}
CDirEntry *FAT32FilesFind(U8 *files_find_mask,I64 fuf_flags,CDirEntry *parent=NULL,I64 *_dir_size=NULL)
{
CPrt *p=Fs->cur_prt;
CFAT32DirEntry *buf;
I64 attr,xsum=0,dir_size=0,sub_dir_size,
cur_dir_cluster,cur_dir_entry,entries_per_cluster;
U8 ch;
CDirEntry *result=NULL,*tempm,long_name;
if (fuf_flags&~FUG_FILES_FIND)
throw(EXCEPT_FUF,7);
try {
MemSet(&long_name,0,sizeof(CDirEntry));
PrtLock(p);
cur_dir_cluster=Name2DirCluster(p,Fs->cur_dir);
buf=MAlloc(BLK_SIZE*p->spc);
entries_per_cluster=FAT32_ENTRIES_PER_BLK*p->spc;
RClusters(Fs->cur_prt,buf,cur_dir_cluster,1);
dir_size+=Fs->cur_prt->spc*BLK_SIZE;
cur_dir_entry=0;
while (ch=*buf[cur_dir_entry].name) {
attr=buf[cur_dir_entry].attr;
if (ch!=0xE5) {
if (attr&_ATTR_LONG_NAME_MASK==_ATTR_LONG_NAME)
CDirLongNameFill(&long_name,&buf[cur_dir_entry],&xsum);
else {
if (!(attr&_ATTR_VOL_ID)) {
tempm=MAlloc(sizeof(CDirEntry));
if (xsum==FATNameXSum(buf[cur_dir_entry].name))
MemCpy(tempm,&long_name,sizeof(CDirEntry));
else
MemSet(tempm,0,sizeof(CDirEntry));
if (FAT32CDirFill(tempm,&buf[cur_dir_entry])) {
tempm->parent=parent;
if (Bt(&fuf_flags,FUf_RECURSE) && attr&_ATTR_DIR && *tempm->name!='.') {
tempm->next=result;
result=tempm;
tempm->full_name=DirNameAbs(tempm->name);
PrtUnlock(p);
if (Cd(tempm->name)) {
tempm->sub=FAT32FilesFind(files_find_mask,fuf_flags,tempm,&sub_dir_size);
tempm->size=tempm->expanded_size=sub_dir_size;
Cd("..");
}
PrtLock(p);
} else if ((attr&_ATTR_DIR || !Bt(&fuf_flags,FUf_JUST_DIRS)) &&
!(Bt(&fuf_flags,FUf_RECURSE) && *tempm->name=='.' && attr&_ATTR_DIR) &&
FilesFindMatch(files_find_mask,tempm->name,fuf_flags)) {
tempm->next=result;
result=tempm;
tempm->full_name=FileNameAbs(tempm->name);
} else
CDirEntryDel(tempm);
} else
CDirEntryDel(tempm);
}
MemSet(&long_name,0,sizeof(CDirEntry));
}
} else
MemSet(&long_name,0,sizeof(CDirEntry));
if (++cur_dir_entry==entries_per_cluster) {
cur_dir_cluster=ClusterNumNext(p,cur_dir_cluster);
if (cur_dir_cluster==INVALID_CLUSTER)
break;
else {
RClusters(p,buf,cur_dir_cluster,1);
dir_size+=Fs->cur_prt->spc*BLK_SIZE;
cur_dir_entry=0;
}
}
}
Free(buf);
PrtUnlock(p);
} catch
PrtUnlock(p);
if (_dir_size)
*_dir_size=dir_size;
return result;
}
Bool FAT32MkDir(CPrt *p,U8 *cur_dir,U8 *name)
{
I64 size=p->spc<<BLK_SIZE_BITS,c,
cur_dir_cluster=Name2DirCluster(p,cur_dir);
U8 *buf=CAlloc(size);
CDirEntry d_native;
CFAT32DirEntry *dFAT=buf;
Bool unlock_break;
try {
unlock_break=BreakLock;
c=FileWrite(name,buf,size,0,_ATTR_DIR,FALSE);
MemSet(&d_native,0,sizeof(CDirEntry));
d_native.attr=_ATTR_DIR;
*d_native.name='.';
d_native.name[1]=0;
d_native.cluster=c;
d_native.size=0;
d_native.datetime=GetCurTimeDate;
FAT32DirFill(dFAT,&d_native);
dFAT++;
MemSet(&d_native,0,sizeof(CDirEntry));
d_native.attr=_ATTR_DIR;
*d_native.name='.';
d_native.name[1]='.';
d_native.name[2]=0;
d_native.cluster=cur_dir_cluster;
d_native.size=0;
d_native.datetime=GetCurTimeDate;
FAT32DirFill(dFAT,&d_native);
WClusters(p,buf,c,1);
Free(buf);
if (unlock_break)
BreakUnlock;
} catch
if (unlock_break)
BreakUnlock;
return TRUE;
}
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