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QDisk.c
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/*
* (c) UQLX - see COPYRIGHT
*/
/*#include "QLtypes.h"*/
#include "QL68000.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "QDisk.h"
#include "QFilesPriv.h"
#include "QL.h"
#include "QL_config.h"
#include "unix.h"
#include "emudisk.h"
#include "QDOS.h"
#include "qx_proto.h"
#include "uqlx_cfg.h"
#define MIN(x,y) ((x)<(y)?(x) : (y))
#define min(_a_,_b_)(_a_<_b_ ? _a_ : _b_)
#define max(_a_,_b_)(_a_>_b_ ? _a_ : _b_)
#define LF_FOUND -9832
#define ERR_BUFFER_FULL -9833
#if 0
struct qDiscHeader {
uw16 id;
uw16 ver;
char name[10];
uw16 random;
uw32 updates;
uw16 free;
uw16 good;
uw16 total;
uw16 secTrack;
uw16 secCylinder;
uw16 tracks;
uw16 secBlock;
uw16 dirEofBlock;
uw16 dirEofByte;
uw16 offset;
uw8 ltp[18];
uw8 ptl[18];
};
#endif
struct qDiscHeader
{
char dummy[512];
};
#define QDH_VER(_p) ((uw16)RW((char*)(_p)+2))
#define QDH_ID(_p) ((uw16)RW((char*)(_p)))
#define QDH_NAME(_p) ((char*)((char*)(_p)+4))
#define QDH_RAND(_p) ((uw16)RW((char*)(_p)+14))
#define QDH_UPDTS(_p) ((uw32)RL((char*)(_p)+16))
#define QDH_FREE(_p) ((uw16)RW((char*)(_p)+20))
#define QDH_GOOD(_p) ((uw16)RW((char*)(_p)+22))
#define QDH_TOTAL(_p) ((uw16)RW((char*)(_p)+24))
#define QDH_SPT(_p) ((uw16)RW((char*)(_p)+26))
#define QDH_SPC(_p) ((uw16)RW((char*)(_p)+28))
#define QDH_TRACKS(_p) ((uw16)RW((char*)(_p)+30))
#define QDH_SPB(_p) ((uw16)RW((char*)(_p)+32))
#define QDH_DIREOFBL(_p) ((uw16)RW((char*)(_p)+34))
#define QDH_DIREOFBY(_p) ((uw16)RW((char*)(_p)+36))
#define QDH_OFFSET(_p) ((uw16)RW((char*)(_p)+38))
#define QDH_LTP(_p) ((uw8*)((char*)(_p)+40))
#define QDH_PTL(_p) ((uw8*)((char*)(_p)+40+18))
#define QDH_SET_VER(_p,_ver) (WW((char*)(_p),_ver+2))
#define QDH_SET_ID(_p,_ver) (WW((char*)(_p),_ver))
#define QDH_SET_RAND(_p,_rand) (WW((char*)(_p)+14,_rand))
#define QDH_SET_UPDTS(_p,_up) (WL((char*)(_p)+16,_up))
#define QDH_SET_FREE(_p,_ver) (WW((char*)(_p)+20,_ver))
#define QDH_SET_GOOD(_p,_ver) (WW((char*)(_p)+22,_ver))
#define QDH_SET_TOTAL(_p,_ver) (WW((char*)(_p)+24,_ver))
#define QDH_SET_SPT(_p,_ver) (WW((char*)(_p)+26,_ver))
#define QDH_SET_SPC(_p,_ver) (WW((char*)(_p)+28,_ver))
#define QDH_SET_TRACKS(_p,_ver) (WW((char*)(_p)+30,_ver))
#define QDH_SET_SPB(_p,_ver) (WW((char*)(_p)+32,_ver))
#define QDH_SET_DIREOFBL(_p,_ver) (WW((char*)(_p)+34,_ver))
#define QDH_SET_DIREOFBY(_p,_ver) (WW((char*)(_p)+36,_ver))
#define QDH_SET_OFFSET(_p,_ver) (WW((char*)(_p)+38,_ver))
/* and here the definitions for QXL.WIN type disks */
/* VER=="QL", ID=="WA" use QDH_VER,QDH_IF */
/* name use QDH_NAME, 20 chars space padded */
/* ignore interleave 0x20 */
#define QWA_SPC(_p) ((uw16)RW((char*)(_p)+0x22)) /* sect per cluster(group)*/
/* ignore sect_per_track*/
#define QWA_CC(_p) ((uw16)RW((char*)(_p)+0x2a)) /*#of groups(clusters)*/
#define QWA_FC(_p) ((uw16)RW((char*)(_p)+0x2c))
#define QWA_SETFC(_p,_gn) (WW((char*)(_p)+0x2c,(_gn)))
#define QWA_SPM(_p) ((uw16)RW((char*)(_p)+0x2e))
/* 0x2e :ignore sectors per map,0x30 #ofmaps */
#define QWA_FFC(_p) ((uw16)RW((char*)(_p)+0x32)) /* linked list of free cls*/
#define QWA_SETFFC(_p,_gn) (WW((char*)(_p)+0x32,(_gn)))
#define QWA_ROOT(_p) ((uw16)RW((char*)(_p)+0x34)) /*1.cluster# of root dir*/
#define QWA_RLEN(_p) ((uw32)RL((char*)(_p)+0x36)) /* root dir len in bytes*/
#define QWA_SETRLEN(_p,_gn) (WL((char*)(_p)+0x36,(_gn)))
#define QWA_FAT(_p) (((char*)(_p)+0x40)) /* beginning of fat */
#define QWDE_FNUM(_p) ((uw16)RW((Ptr)(_p)+0x3a))
#define QWDE_SETFNUM(_p,_gn) (WW((char*)(_p)+0x3a,(_gn)))
static int gError;
struct sectorInfo {
uw32 time;
int logSector;
FileNum fileNum;
Cond free;
Cond changed;
Cond locked;
};
struct formatInfo {
w32 blocks;
uw16 tracks;
uw8 sides;
uw8 sectors;
};
static uw8 format_table_dd[36]={0,3,6,0x80,0x83,0x86,1,4,7,0x81,0x84,0x87,2,5,8,0x82,0x85,0x88,0,6,12,1,7,13,2,8,14,3,9,15,4,10,16,5,11,17};
static uw8 format_table_hd[36]={0,2,4,6,8,10,12,14,16,0x80,0x82,0x84,0x86,0x88,0x8a,0x8c,0x8e,0x90,1,3,5,7,9,11,13,15,17,0x81,0x83,0x85,0x87,0x89,0x8b,0x8d,0x8f,0x91};
struct FLP_FCB
{
struct qDiscHeader *qdh;
struct sectorInfo *si/*[NPOOL]*/;
char *buffer/*[512*NPOOL]*/;
int bufcount;
int refNum; /* file descriptor */
int counter;
int file_count;
time_t lastclose;
int isdev;
int readonly;
Ptr lastSector;
short fatSectors;
Cond isValid;
/*Cond isDisk; */
enum DISK_TYPE {floppyDD,floppyHD,qlwa } DiskType;
};
struct FLP_FCB *curr_flpfcb;
static OSErr DiskRead(long ,Ptr ,long ,long );
static OSErr LoadLogSector(int ,Ptr );
static void FixLogical(uw8 *,Cond );
static OSErr WriteLogSector(int ,Ptr );
static OSErr WriteBlock0(void);
w32 qfLen(FileNum );
/* replaces dangerous FlushFile */
void FlushSectors()
{
int k;
/* this should not be necessary but the code is not yet very clean..*/
WriteBlock0();
for (k=0; k<curr_flpfcb->bufcount; k++)
{
if(!curr_flpfcb->si[k].free && curr_flpfcb->si[k].changed)
{
WriteLogSector(curr_flpfcb->si[k].logSector, curr_flpfcb->buffer+((long)k<<9));
curr_flpfcb->si[k].changed=false;
if(V4) printf("flushing buffer %d\n",k);
}
}
}
/* routine called every few seconds to close open devices */
/* - to allow diskswapping */
void TestCloseDevs()
{
int i,k;
for (i=0; i<MAXDEV; i++)
for(k=0; k<8; k++)
if ((qdevs[i].Where[k] == 1) && (curr_flpfcb=qdevs[i].flpp[k])) /* isfloppy/ QXLWIN? */
if ((curr_flpfcb->file_count==0) &&
(curr_flpfcb->lastclose!=-1) &&
(time(NULL)-curr_flpfcb->lastclose>3))
{
FlushSectors();
close(curr_flpfcb->refNum);
free(curr_flpfcb->buffer);
free(curr_flpfcb->si);
free(curr_flpfcb);
qdevs[i].flpp[k]=NULL;
}
}
/* routines initialization */
static void InitDiskTables()
{
int i;
for(i=0;i<curr_flpfcb->bufcount;i++)
{
curr_flpfcb->si[i].free=true;
curr_flpfcb->si[i].locked=false;
}
}
FileNum fat_fn()
{
FileNum fn;
fn.dir=0;
fn.entrynum=0;
fn.file=-1;
}
int is_qlwa()
{
return (curr_flpfcb->DiskType==qlwa);
}
int sect_per_cluster()
{
if (curr_flpfcb->DiskType==qlwa)
return (QWA_SPC(curr_flpfcb->qdh));
else
return (QDH_SPB(curr_flpfcb->qdh));
}
FileNum root_fn()
{
FileNum DirFn;
DirFn.dir=0;
DirFn.entrynum=0;
if (curr_flpfcb->DiskType==qlwa)
DirFn.file=QWA_ROOT(curr_flpfcb->qdh);
else
DirFn.file=0;
return DirFn;
}
int root_flen()
{
if (curr_flpfcb->DiskType==qlwa)
return (QWA_RLEN(curr_flpfcb->qdh));
else
return (QDH_DIREOFBL(curr_flpfcb->qdh)<<9)+(QDH_DIREOFBY(curr_flpfcb->qdh));
}
static OSErr LoadSector0(void)
{
OSErr e;
int i;
char buffer[512];
e=DiskRead(curr_flpfcb->refNum,buffer,512,0);
if(e==0)
{
if ( QDH_ID(buffer)!='QL' )
return QERR_NI;
switch(QDH_VER(buffer))
{
case 'WA' : curr_flpfcb->DiskType=qlwa;
break;
case '5A' : curr_flpfcb->DiskType=floppyDD;
break;
case '5B' : curr_flpfcb->DiskType=floppyHD;
break;
default : return QERR_NI;
}
if (curr_flpfcb->DiskType==qlwa)
curr_flpfcb->fatSectors=QWA_SPM(buffer);
else
{
/* **FIXME**,plain wrong also fixlogoical!! */
curr_flpfcb->fatSectors=(3*QDH_TOTAL(buffer)/QDH_SPB(buffer)+96)/512;
if(V4) printf("guessing %d sectors FAT length\n",curr_flpfcb->fatSectors);
}
curr_flpfcb->bufcount=curr_flpfcb->fatSectors+9; /* Fit FAT + some buffer */
/* free old buffers */
if (curr_flpfcb->buffer)
free(curr_flpfcb->buffer);
curr_flpfcb->buffer=(char *)malloc(512*(curr_flpfcb->bufcount));
curr_flpfcb->si=(struct sectorInfo *)calloc(curr_flpfcb->bufcount,sizeof(struct sectorInfo));
curr_flpfcb->qdh=(struct qDiscHeader*)curr_flpfcb->buffer;
e=DiskRead(curr_flpfcb->refNum,curr_flpfcb->buffer,512,0);
if (curr_flpfcb->DiskType!=qlwa)
{
if(curr_flpfcb->DiskType==floppyHD) curr_flpfcb->fatSectors<<=1;
FixLogical(QDH_LTP(curr_flpfcb->qdh),curr_flpfcb->DiskType==floppyDD);
}
InitDiskTables();
for(i=1;i<curr_flpfcb->fatSectors && e==0;i++)
{
e=LoadLogSector(i,curr_flpfcb->buffer+((long)i<<9));
}
for(i=0;i<curr_flpfcb->fatSectors;i++)
{
curr_flpfcb->si[i].free=false;
curr_flpfcb->si[i].changed=false;
curr_flpfcb->si[i].locked=true;
curr_flpfcb->si[i].logSector=i;
curr_flpfcb->si[i].fileNum=fat_fn();
}
}
return e;
}
/* Host OS disk access functions */
OSErr QFOpenDisk(struct mdvFile *f)
{
int fs,drnum,fd;
int k,res;
struct stat sbuf;
int isdev,readonly;
mode_t xmode;
fs=GET_FILESYS(f);
drnum=GET_DRIVE(f);
curr_flpfcb=qdevs[fs].flpp[drnum];
if (!curr_flpfcb)
{
readonly=0;
res=stat(qdevs[fs].mountPoints[drnum],&sbuf);
if (res<0)
perror("could not stat file/device");
if (QMD.strict_lock)
{
xmode=(sbuf.st_mode | S_ISGID) & (~ S_IXGRP );
if (chmod(qdevs[fs].mountPoints[drnum],xmode))
if (errno != EROFS)
perror("warning, could not change mode, locking may not be available");
}
fd=open(qdevs[fs].mountPoints[drnum],O_RDWR);
if (fd<0 && (errno==EACCES || errno==EROFS))
{
fd=open(qdevs[fs].mountPoints[drnum],O_RDONLY);
readonly=1;
}
if(V4) printf("calling OpenDisk, res %d\n",fd);
/*qdevs[fs].Present[drnum]= (fd>=0);*/
if (fd<0)
{
perror("file/device not available");
return -1;
}
#ifndef NO_LOCK
isdev= (sbuf.st_mode & S_IFBLK) | (sbuf.st_mode & S_IFCHR);
if (!readonly)
{
#ifndef BSD44
res=lockf(fd, F_TLOCK, 1024);
#else
{
struct flock flk;
flk.l_start=0;
flk.l_len=1024;
flk.l_type=F_WRLCK;
flk.l_whence=SEEK_SET;
res=fcntl(fd, F_SETLK, &flk);
}
#endif
if (res<0 && !isdev)
{
perror("could not lock file/device");
return -1;
}
if (res<0 && isdev)
perror("warning - could not lock file/device");
/* subject to hope that devices are exclusive... */
}
#endif
if (qdevs[fs].flpp[drnum]==NULL)
curr_flpfcb=qdevs[fs].flpp[drnum]= (struct FLP_FCB *)calloc(1,sizeof (struct FLP_FCB));
(qdevs[fs].flpp[drnum])->refNum=fd;
if(V4) printf("flp%d_ allocated as %s\n",k,qdevs[fs].mountPoints[drnum]);
curr_flpfcb->lastSector=nil;
curr_flpfcb->counter=0;
curr_flpfcb->file_count=0;
curr_flpfcb->isdev=isdev;
curr_flpfcb->lastclose=-1;
curr_flpfcb->readonly=readonly;
res=LoadSector0();
if (res<0)
{
printf("unrecognised format, not a QDOS medium?\n");
/*
carefull here: buffer has not been allocated
or is already freed
*/
free(curr_flpfcb);
curr_flpfcb=qdevs[fs].flpp[drnum]= NULL;
return -1;
}
curr_flpfcb->isValid=1;
curr_flpfcb->qdh= (struct qDiscHeader *)curr_flpfcb->buffer;
/*InitDiskTables();*/
}
else return 0; /* nothing to do */
}
static OSErr DiskRead(long fref,Ptr dest,long count,long offset)
{
int res,fd;
fd=fref;
if(V4) printf("positioning at %ld\n",offset);
res=lseek(fd,offset,SEEK_SET);
if(res<0) {
perror("DiskRead:lseek");
return -1;
}
res=x_read(fd,dest,count);
if(V4) printf("calling DiskRead, res %d\n",res);
if (res<0) {perror("DiskRead:read");return -1;}
return 0;
}
static OSErr DiskWrite(long fref, Ptr dest,long count,long offset)
{
int res,fd;
fd=fref;
res=lseek(fd,offset,SEEK_SET);
if(res<0) {
perror("DiskWrite:lseek");
return -1;
}
res=write(fd,dest,count);
if(V4) printf("calling DiksWrite\n");
if (res<0) return -1;
return 0;
}
/* read/write sectors */
static OSErr LoadPhySector(uw8 side,uw16 track,uw16 sector,Ptr p)
{
OSErr e;
if(curr_flpfcb->buffer!=nil)
{
e=DiskRead(curr_flpfcb->refNum,p,512,((long)track*QDH_SPC(curr_flpfcb->qdh)+sector+side*QDH_SPT(curr_flpfcb->qdh))<<9);
}
else e=ERR_UNINITIALIZED_DISK;
return e;
}
static OSErr LoadLogSector(int sector,Ptr p)
{
uw8 side;
uw16 track;
if(curr_flpfcb->buffer==nil)
return ERR_UNINITIALIZED_DISK;
if (curr_flpfcb->DiskType==qlwa)
{
return DiskRead(curr_flpfcb->refNum,p,512,sector*512);
}
else
{
side=QDH_LTP(curr_flpfcb->qdh)[sector%QDH_SPC(curr_flpfcb->qdh)]; /* ??????????? */
track=sector/QDH_SPC(curr_flpfcb->qdh);
sector=side&0x7f;
if((side&=0x80)!=0) side=1;
return LoadPhySector(side,track,(track*QDH_OFFSET(curr_flpfcb->qdh)+sector)%QDH_SPT(curr_flpfcb->qdh),p);
}
}
static OSErr WritePhySector(uw8 side,uw16 track,uw16 sector,Ptr p)
{
OSErr e;
long abs;
if(curr_flpfcb->buffer!=nil)
{
abs=(long)track*QDH_SPC(curr_flpfcb->qdh)+sector+side*QDH_SPT(curr_flpfcb->qdh);
QDH_SET_UPDTS(curr_flpfcb->qdh,QDH_UPDTS(curr_flpfcb->qdh)+1);
e=DiskWrite(curr_flpfcb->refNum,p,512,abs<<9);
/* if(abs!=0) si->changed=true; slows down disk operations! */
}
else e=ERR_UNINITIALIZED_DISK;
return e;
}
static OSErr WriteLogSector(int sector,Ptr p)
{
uw8 side;
uw16 track;
if(curr_flpfcb->buffer==nil)
return ERR_UNINITIALIZED_DISK;
if (curr_flpfcb->DiskType==qlwa)
{
return DiskWrite(curr_flpfcb->refNum,p,512,sector*512);
}
else
{
side=QDH_LTP(curr_flpfcb->qdh)[sector%QDH_SPC(curr_flpfcb->qdh)];
track=sector/QDH_SPC(curr_flpfcb->qdh);
sector=side&0x7f;
if((side&=0x80)!=0) side=1;
return WritePhySector(side,track,(track*QDH_OFFSET(curr_flpfcb->qdh)+sector)%QDH_SPT(curr_flpfcb->qdh),p);
}
}
/* read/write sectors through buffer */
static Ptr GetSector(int sector,FileNum fileNum)
{
int i,k;
long t=2000000000l;
Ptr p;
if(V4) printf("GetSector sector %d, file %d\n",sector,fileNum.file);
if(curr_flpfcb->buffer==nil)
{
gError=ERR_UNINITIALIZED_DISK;
return nil;
}
for(i=0;i<curr_flpfcb->bufcount;i++)
{
if(curr_flpfcb->si[i].free)
{
k=i;
t=-1;
}
else if(curr_flpfcb->si[i].logSector==sector)
{
curr_flpfcb->si[i].time=++(curr_flpfcb->counter);
gError=0;
if(V4) printf("... returns cached sector %d\n",i);
return curr_flpfcb->buffer+((long)i<<9);
}
else if( !curr_flpfcb->si[i].locked /* && curr_flpfcb->si[i].time<t */ )
{
t=curr_flpfcb->si[i].time;
k=i;
}
#if 0
else {
printf("GetSector1 : Dropped out of if clause!\n");
}
printf("GetSector1 : !locked = %d, time %d t %d \t\t",!curr_flpfcb->si[i].locked,curr_flpfcb->si[i].time,t);
printf(": time<t = %d\n",((long)curr_flpfcb->si[i].time)<t);
printf("GetSector1 : i = %d, k = %d\n",i, k);
#endif
}
if(V4) printf("... uses buffer %d,\t",k);
p=curr_flpfcb->buffer+((long)k<<9);
if(!curr_flpfcb->si[k].free && curr_flpfcb->si[k].changed) WriteLogSector(curr_flpfcb->si[k].logSector,p);
gError=LoadLogSector(sector,p);
if(gError==0)
{
curr_flpfcb->si[k].logSector=sector;
curr_flpfcb->si[k].fileNum=fileNum;
curr_flpfcb->si[k].time=++(curr_flpfcb->counter);
curr_flpfcb->si[k].free=false;
curr_flpfcb->si[k].changed=false;
}
else
{
curr_flpfcb->si[k].free=true;
p=nil;
}
if(V4) printf("returns %d\n",p);
return p;
}
static void PutSector(Ptr p)
{
int k;
k=((char*)p-(char*)(curr_flpfcb->buffer))>>9;
if(k<0 || k>=curr_flpfcb->bufcount) CustomErrorAlert("Bad written sector buffer");
else
{
curr_flpfcb->si[k].changed=true;
curr_flpfcb->si[k].time=++(curr_flpfcb->counter);
}
}
static void EmptySectors(void)
{
int i;
if(curr_flpfcb->buffer!=nil)
for(i=0;i<curr_flpfcb->bufcount;i++)
if(!curr_flpfcb->si[i].free)
{
if(curr_flpfcb->si[i].changed)
{
WriteLogSector(curr_flpfcb->si[i].logSector,curr_flpfcb->buffer+((long)i<<9));
curr_flpfcb->si[i].changed=false;
}
if(!curr_flpfcb->si[i].locked) curr_flpfcb->si[i].free=true;
}
}
#if 0 /* replaced by safer FLushSectors() */
static void FlushFile(FileNum fileNum)
{
int i;
if(curr_flpfcb->buffer!=nil)
for(i=0;i<curr_flpfcb->bufcount;i++)
if(!curr_flpfcb->si[i].free && curr_flpfcb->si[i].changed && curr_flpfcb->si[i].fileNum.file==fileNum.file)
{
WriteLogSector(curr_flpfcb->si[i].logSector,curr_flpfcb->buffer+((long)i<<9));
curr_flpfcb->si[i].changed=false;
}
}
#endif
static OSErr WriteBlock0(void)
{
int i;
OSErr e=0;
for(i=1;i<curr_flpfcb->fatSectors && e==0;i++)
{
e=WriteLogSector(i,curr_flpfcb->buffer+((long)i<<9));
curr_flpfcb->si[i].changed=false;
}
if(e==0)
{
e=WriteLogSector(0,curr_flpfcb->buffer);
curr_flpfcb->si->changed=false;
}
return e;
}
static int QLWA_KillFileTail(FileNum fileNum, int sector)
{
uw16 *p;
int group,sr,g;
int rels=0;
p=(uw16*)(curr_flpfcb->buffer+0x40);
group=(sector+QWA_SPC(curr_flpfcb->qdh)-1)/QWA_SPC(curr_flpfcb->qdh)+1;
sr=sector%QWA_SPC(curr_flpfcb->qdh);
for(p+=fileNum.file,g=0 ; g!=(group-1) && *p; g++)
{
/*pl=p;*/
p=(uw16*)(curr_flpfcb->buffer+0x40)+(uw16)(RW(p));
}
if (g==group-1)
{
uw16 *p1;
for (p1=p; *p1;rels++)
p1=(uw16*)(curr_flpfcb->buffer+0x40)+(uw16)(RW(p1));
WW(p1,QWA_FFC(curr_flpfcb->qdh));
QWA_SETFFC(curr_flpfcb->qdh,(uw16)RW(p));
WW(p,0);
curr_flpfcb->si[((char*)p-curr_flpfcb->buffer)>>9].changed=true;
curr_flpfcb->si[((char*)p1-curr_flpfcb->buffer)>>9].changed=true;
QWA_SETFC(curr_flpfcb->qdh,QWA_FC(curr_flpfcb->qdh)+rels);
/*WriteBlock0();*/ /* appears clean */
#if 0 /* expensive, can wait */
FlushSectors();
#endif
}
}
/* FAT */
/* get disk logical sector number for a logical sector in a file */
/* QLWA version */
static int QLWA_GetFileSectNum(FileNum fileNum, int sector)
{
uw16 *p;
int group,sr,g;
p=(uw16*)(curr_flpfcb->buffer+0x40);
group=sector/QWA_SPC(curr_flpfcb->qdh);
sr=sector%QWA_SPC(curr_flpfcb->qdh);
/*get first cluster of file */
if(V4) printf("\n SpC %d, first cluster %d\t",QWA_SPC(curr_flpfcb->qdh),fileNum.file);
for(p+=fileNum.file,g=0 ; g!=group && *p; g++)
{
if(V4) printf("p-(buffer+0x40)=%d\t",(int)p-((int) (curr_flpfcb->buffer+0x40)));
if(V4) printf("next block nr. %d\t",(uw16)RW(p));
p=(uw16*)(curr_flpfcb->buffer+0x40)+(uw16)RW(p);
}
if (g==group)
return ((int)((int)p-(int)(curr_flpfcb->buffer+0x40)))/2*QWA_SPC(curr_flpfcb->qdh)+sr;
gError=ERR_NO_FILE_BLOCK;
return -1;
}
/* floppy version */
static int FileBlockSector(FileNum fileNum, int sector)
{
register uw8 *p;
register w32 value;
register w16 i,n;
int res;
w16 w;
if (curr_flpfcb->DiskType==qlwa)
{
res=QLWA_GetFileSectNum(fileNum, sector);
return res;
}
n=(QDH_TOTAL(curr_flpfcb->qdh)/QDH_SPB(curr_flpfcb->qdh))>>1;
p=(uw8*)(curr_flpfcb->buffer+96);
value=((w32)(fileNum.file&0x0fff)<<12)+((sector/QDH_SPB(curr_flpfcb->qdh))&0x0fff);
w=-1;
for(i=0;i<n;i++)
{
if((RL((w32*)p)>>8)==value)
{
w=i<<1;
break;
}
else if((RL((w32*)(p+2))&0x00ffffff)==value)
{
w=(i<<1)+1;
break;
}
p+=6;
}
if(w>=0)
{
w=w*QDH_SPB(curr_flpfcb->qdh)+(sector%QDH_SPB(curr_flpfcb->qdh));
}
else gError=ERR_NO_FILE_BLOCK;
return w;
}
/* special function for 0th block.. (1th allocation) :*/
static Ptr QLWA_GetFreeBlock0(FileNum *fe)
{
int nb;
uw16 *p;
if (QWA_FC(curr_flpfcb->qdh)>0 && QWA_FFC(curr_flpfcb->qdh))
{
nb=QWA_FFC(curr_flpfcb->qdh);
p=(uw16*)(curr_flpfcb->buffer+0x40);
p+=nb;
QWA_SETFFC(curr_flpfcb->qdh,(uw16)RW(p)); /* relink free block list */
WW(p,0);
/* mark FAT as changed */
curr_flpfcb->si[0].changed=true;
curr_flpfcb->si[((char*)p-curr_flpfcb->buffer)>>9].changed=true;
QWA_SETFC(curr_flpfcb->qdh, QWA_FC(curr_flpfcb->qdh)-1);
(*fe).file=nb;
return GetSector(nb*QWA_SPC(curr_flpfcb->qdh), *fe);
}
else
{
gError=QERR_DF;
return nil;
}
}
/* block ignored for QLWA format */
static Ptr QLWA_GetFreeBlock(FileNum fileNum)
{
int g,i;
int nb;
uw16 *p;
if (QWA_FC(curr_flpfcb->qdh)>0 && QWA_FFC(curr_flpfcb->qdh))
{
nb=QWA_FFC(curr_flpfcb->qdh);
p=(uw16*)(curr_flpfcb->buffer+0x40);
p+=nb;
QWA_SETFFC(curr_flpfcb->qdh,(uw16)RW(p)); /* relink free block list */
WW(p,0);
/* mark FAT as changed */
curr_flpfcb->si[((char*)p-curr_flpfcb->buffer)>>9].changed=true;
p=(uw16*)(curr_flpfcb->buffer+0x40);
for(p+=fileNum.file ; *p ; p=(uw16*)(curr_flpfcb->buffer+0x40)+(uw16)RW(p))
{
if(V4) printf("GetFreeBlock: %d\n",((int)p-(int)(curr_flpfcb->buffer+0x40))/2);
}
if (*p==0) WW(p,nb); /* append block to file */
if(V4) printf("GetFreeBlock -last current block: %d \t adding %d\n",((int)p-(int)(curr_flpfcb->buffer+0x40))/2,nb);
/* mark FAT as changed */
curr_flpfcb->si[0].changed=true;
curr_flpfcb->si[((char*)p-curr_flpfcb->buffer)>>9].changed=true;
QWA_SETFC(curr_flpfcb->qdh,QWA_FC(curr_flpfcb->qdh)-1/*QWA_SPC(curr_flpfcb->qdh)*/);
#if 0 /* delay flush till close,open,flush or delete */
WriteBlock0();
#endif
return GetSector(nb*QWA_SPC(curr_flpfcb->qdh), fileNum);
}
else
{
gError=QERR_DF;
return nil;
}
}
/* allocate a file block and return a pointer to its first sector */
/* block meaningless for QLWA Format */
static Ptr GetFreeBlock(FileNum fileNum, w16 block)
{
register uw8 *p;
register w16 i,n;
w16 k;
if (curr_flpfcb->DiskType==qlwa)
return QLWA_GetFreeBlock(fileNum);
if(QDH_FREE(curr_flpfcb->qdh)>=1)
{
n=(QDH_TOTAL(curr_flpfcb->qdh)/QDH_SPB(curr_flpfcb->qdh))>>1;
p=(uw8*)(curr_flpfcb->buffer+96);
for(i=0;i<n;i++)
{
if(*p==0xfd)
{
WW(((w16*)p),(fileNum.file<<4)|(block>>8));
p[2]=(uw8)block;
k=i<<1;
curr_flpfcb->si[((i*6)+96)>>9].changed=true;
curr_flpfcb->si[((i*6)+98)>>9].changed=true;
goto found;
}
if(p[3]==0xfd)
{
p[3]=(uw8)(fileNum.file>>4);
WW(((w16*)(p+4)), (fileNum.file<<12)|(block&0x0fff));
k=(i<<1)+1;
curr_flpfcb->si[((i*6)+99)>>9].changed=true;
curr_flpfcb->si[((i*6)+101)>>9].changed=true;
found:
QDH_SET_FREE(curr_flpfcb->qdh,QDH_FREE(curr_flpfcb->qdh)-QDH_SPB(curr_flpfcb->qdh));
curr_flpfcb->si->changed=true;
return GetSector(k*QDH_SPB(curr_flpfcb->qdh),fileNum);
}
p+=6;
}
}
gError=QERR_DF;
return nil;
}
static OSErr QLWA_KillFile(FileNum fileNum)
{
uw16 *p;
int rels=1;
p=(uw16*)(curr_flpfcb->buffer+0x40);
for(p+=fileNum.file ; *p; rels++)
p=(uw16*)(curr_flpfcb->buffer+0x40)+(uw16)(RW(p));
WW(p,QWA_FFC(curr_flpfcb->qdh));
/* mark FAT as changed */
curr_flpfcb->si[0].changed=true;
curr_flpfcb->si[((char*)p-curr_flpfcb->buffer)>>9].changed=true;
QWA_SETFFC((curr_flpfcb->qdh),fileNum.file);
QWA_SETFC(curr_flpfcb->qdh,QWA_FC(curr_flpfcb->qdh)+rels);
return WriteBlock0(); /* not much use to delay */
}
static OSErr KillFile(FileNum fileNum)
{
register uw8 *p;
register w16 i,n;
if (curr_flpfcb->DiskType==qlwa)
{
return QLWA_KillFile(fileNum);
}
else
{
n=(QDH_TOTAL(curr_flpfcb->qdh)/QDH_SPB(curr_flpfcb->qdh))>>1;
p=(uw8*)(curr_flpfcb->buffer+96);
for(i=0;i<n;i++)
{
if((RW((w16*)p)>>4)==fileNum.file)
{
*p=0xfd;
QDH_SET_FREE(curr_flpfcb->qdh,QDH_FREE(curr_flpfcb->qdh)+QDH_SPB(curr_flpfcb->qdh));
}
if((((w16)p[3]<<4)|(p[4]>>4))==fileNum.file)
{
p[3]=0xfd;
QDH_SET_FREE(curr_flpfcb->qdh,QDH_FREE(curr_flpfcb->qdh)+QDH_SPB(curr_flpfcb->qdh));
}
p+=6;
}
}
return WriteBlock0(); /* not clean, must be called */