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fs_io_dxx.c
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fs_io_dxx.c
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/*
Disk Image File System Interface routine module for 64net/2
(Say that with a mouth full of golf balls!)
(C)Copyright Paul Gardner-Stephen 1996
*/
#include "config.h"
#include "fs.h"
#include "fs_func.h"
#include "datestamp.h"
int
fs_dxx_getinfo (fs64_direntry * de)
{
long i;
uchar sectorbuffer[256];
/* Read in the sector and sort the info there-in
if intcount =8 then link to next sector.
if no next sector - return(-1); for no file.
*/
if (!readts (&de->filesys, de->track, de->sector, sectorbuffer))
{
/* read sucessful - so lets go on */
if (de->intcount > 7)
{
/* weve finished this sector */
/* so check for next sector link.. */
if (sectorbuffer[0])
{
/* link to next sector */
de->track = sectorbuffer[0];
de->sector = sectorbuffer[1];
de->intcount = 0;
/* now recurse into this function with a "good" parameter */
return (fs64_getinfo (de));
}
else
{
/* no next sector, ergo - end of directory */
/* not an error */
return (-1); /* no sir,.. i dont like it */
}
}
/* OK... lets *really* get the files info :) */
de->invisible = 0; /* we want the file to be visible */
de->filetype = sectorbuffer[2 + 32 * de->intcount];
/* copy filename */
for (i = 0; i < 16; i++)
{
de->fs64name[i] = sectorbuffer[de->intcount * 32 + 5 + i];
}
de->fs64name[16] = 0;
/* blocks */
de->blocks = sectorbuffer[30 + 32 * de->intcount] + 256 * sectorbuffer[31 + 32 * de->intcount];
/* start track and sector of file */
de->first_track = sectorbuffer[3 + 32 * de->intcount];
de->first_sector = sectorbuffer[4 + 32 * de->intcount];
return (0);
}
else
{
/* couldnt read sector :( */
/* readts will have set the error */
return (-1);
}
}
int
fs_dxx_findnext (fs64_direntry * de)
{
/* all work for this file system is done in fs64_getinfo
as no actual file name is fetched (the job of fs64_findnext
itself).
*/
int i = 0;
/* read entries until a realone turns up,
or the directory is emptied */
de->filetype = 0;
while ((!de->filetype) && (!i))
{
i = fs64_getinfo (de);
de->intcount++;
}
if (i)
{
/* end of directory, so shut things down */
de->active = 0;
fclose (de->filesys.fsfile);
de->filesys.fsfile=0;
}
return (i);
}
int
fs_dxx_format (fs64_filesystem * fs, uchar *name, uchar *id)
{
switch (fs->media)
{
case media_D64:
return (fs_d64_format (fs, name, id));
case media_D71:
return (fs_d71_format (fs, name, id));
case media_D81:
return (fs_d81_format (fs, name, id));
case media_DHD:
return (fs_dhd_format (fs, name, id));
default:
set_error (38, 0, 0);
return (-1); /* unimplemented */
}
}
int
fs_dxx_validate (fs64_filesystem * fs, int purgeflag)
{
/* Validate a file system */
switch (fs->media)
{
case media_D64:
return (fs_d64_validate (fs, purgeflag));
case media_D71:
return (fs_d71_validate (fs, purgeflag));
case media_D81:
return (fs_d81_validate (fs, purgeflag));
case media_DHD:
return (fs_dhd_validate (fs, purgeflag));
default:
set_error (38, 0, 0);
return (-1); /* unimplemented */
}
}
int
fs_dxx_createfile (uchar *fsfilename, uchar *name, int ft, int rel_len, fs64_file * f, int dirtrack, int dirsect, int media)
{
/* create a new file on a disk image */
/* Methodology:
0) convert path to a filesystem
1) Check for atleast 2 free blocks
2) Check for free dir entry (alloc new dir block if required
using method appropriate to media)
3) Create dir entry
4) Alloc first block (?)
*/
uchar sectbuff[256];
int t, s;
/* Step 0 - Convert fsfilename to a 64net/2 file system */
strcpy ((char*)f->filesys.fspath, (char*)fsfilename);
f->filesys.dirtrack = dirtrack;
f->filesys.dirsector = dirsect;
t = dirtrack;
s = dirsect;
f->filesys.fsfile = fopen ((char*)fsfilename, "r+");
if (!f->filesys.fsfile)
{
set_error (74, 0, 0);
return (-1);
}
f->filesys.media = media;
/* Step 1 - Check for atleast 2 free blocks */
if (fs64_blocksfree (&f->filesys) < 2)
{
/* Disk full */
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
set_error (72, 0, 0);
return (-1);
}
/* Step 2 - Find free direntry (ie file type = 0x00) */
/* Step 2.1- get first *real* directory block (ie read link) */
if (readts (&f->filesys, t, s, sectbuff))
{
/* readts will have set the error status */
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
t = sectbuff[0];
s = sectbuff[1];
/* read this block in */
if (readts (&f->filesys, t, s, sectbuff))
{
/* readts will have set the error status */
return (-1);
}
/* Step 2.2 - start search for free directory entry */
{
int i = 0;
while (1)
{
if (sectbuff[i * 32 + 2] == 0)
{
/* bingo! */
break;
}
else
{
i++;
if (i > 7)
{
/* link to next block */
int ot, os;
i = 0;
ot = t;
os = s;
t = sectbuff[0];
s = sectbuff[1];
if (t == 0)
{
/* allocate a new directory block */
int tt, ts;
if (fs_dxx_findfreeblock (&f->filesys, &tt, &ts))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
else
{
sectbuff[0] = tt;
sectbuff[1] = ts;
if (writets (&f->filesys, ot, os, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
if (fs_dxx_allocateblock (&f->filesys, tt, ts))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
t = tt;
s = ts;
/* prepare sector */
sectbuff[0] = 0;
sectbuff[1] = 0xff;
sectbuff[2] = 0;
sectbuff[34] = 0;
sectbuff[66] = 0;
sectbuff[98] = 0;
sectbuff[130] = 0;
sectbuff[162] = 0;
sectbuff[194] = 0;
sectbuff[226] = 0;
/* and write */
if (writets (&f->filesys, t, s, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
}
}
else
{
/* read next block */
readts (&f->filesys, t, s, sectbuff);
}
} /* if (i>7) */
} /* else - ie not empty directory entry */
} /* while (1) */
/* find, and allocate a block */
{
int tt, ts;
if (fs_dxx_findfreeblock (&f->filesys, &tt, &ts))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
else
{
fs_dxx_allocateblock (&f->filesys, tt, ts);
}
/* now make dir entry */
switch (ft)
{
case cbm_PRG:
case cbm_SEQ:
case cbm_USR:
{
/* create PRG,USR, or SEQ file */
int j;
sectbuff[i * 32 + 2] = ft; /* file type */
sectbuff[i * 32 + 3] = tt; /* start track */
sectbuff[i * 32 + 4] = ts; /* start sector */
sectbuff[i * 32 + 30] = 0;
sectbuff[i * 32 + 31] = 0; /* blocks in file */
/* filename (0xa0 padded) */
for (j = 0; name[j]; j++)
{
sectbuff[i * 32 + 5 + j] = name[j];
}
for (; j < 16; j++)
sectbuff[i * 32 + 5 + j] = 0xa0;
/* time/date stamp */
{
int y, m, d, h, mi, s;
gettimestamp (&y, &m, &d, &h, &mi, &s);
sectbuff[i * 32 + 23] = y % 100;
sectbuff[i * 32 + 24] = m;
sectbuff[i * 32 + 25] = d;
sectbuff[i * 32 + 26] = h;
sectbuff[i * 32 + 27] = mi;
}
if (writets (&f->filesys, t, s, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
/* prepare first sector etc */
f->buffer[0] = 0;
f->buffer[1] = 0;
/* set buffer and poss infomation etc.. */
f->open = 1;
strcpy ((char*)f->fs64name, (char*)name);
strcpy ((char*)f->realname, (char*)fsfilename);
f->first_track = tt;
f->first_sector = ts;
f->first_poss = 0xfe;
f->mode = mode_WRITE;
f->curr_track = tt;
f->curr_sector = ts;
f->blocks = 0;
f->realsize = 0;
f->filetype = 0x80 | t;
f->bp = 2;
f->be = 2;
/* directory entry stuff */
f->de.track = t;
f->de.sector = s;
f->de.intcount = i;
/* bingo! */
return (0);
break;
}
case cbm_REL:
{
/* To create a rel:
1) Make dir entry
2) are we on a .DHD ?
Yes ->
2.1) Create super-side sector
2.2) Create side-sector
No ->
2.1) Create side sector
*/
int j;
int ss, st, sst=0, sss=0; /* side and super side sector blocks */
/* allocate block for [super] side sector */
if (fs_dxx_findfreeblock (&f->filesys, &st, &ss))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
else
{
if (fs_dxx_allocateblock (&f->filesys, st, ss))
{
/* file system is inconsistant! */
set_error (71, st, ss);
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
}
if (f->filesys.media == media_DHD)
{
/* copy side block id to super side block id */
sst = st;
sss = ss;
/* allocate block for side sector */
if (fs_dxx_findfreeblock (&f->filesys, &st, &ss))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
else
{
if (fs_dxx_allocateblock (&f->filesys, st, ss))
{
/* file system is inconsistant! */
set_error (71, st, ss);
fclose (f->filesys.fsfile);
return (-1);
}
}
}
/* Make dir entry */
sectbuff[i * 32 + 2] = ft | cbm_CLOSED;
sectbuff[i * 32 + 3] = tt; /* start track */
sectbuff[i * 32 + 4] = ts; /* start sector */
if (f->filesys.media == media_DHD)
{
/* super side sector */
sectbuff[i * 32 + 19] = sst;
sectbuff[i * 32 + 20] = sss;
}
else
{
/* side sector */
sectbuff[i * 32 + 19] = st;
sectbuff[i * 32 + 20] = ss;
}
sectbuff[i * 32 + 21] = rel_len; /* record size */
sectbuff[i * 32 + 30] = 0;
sectbuff[i * 32 + 31] = 0; /* blocks in file */
/* filename (0xa0 padded) */
for (j = 0; name[j]; j++)
{
sectbuff[i * 32 + 5 + j] = name[j];
}
for (; j < 16; j++)
sectbuff[i * 32 + 5 + j] = 0xa0;
/* time/date stamp */
{
int y, m, d, h, mi, s;
gettimestamp (&y, &m, &d, &h, &mi, &s);
sectbuff[i * 32 + 23] = y % 100;
sectbuff[i * 32 + 24] = m;
sectbuff[i * 32 + 25] = d;
sectbuff[i * 32 + 26] = h;
sectbuff[i * 32 + 27] = mi;
}
/* blocks initially allocated */
if (f->filesys.media == media_DHD)
sectbuff[i * 32 + 28] = 3;
else
sectbuff[i * 32 + 28] = 2;
sectbuff[i * 32 + 29] = 0;
/* write parent dir block back */
if (writets (&f->filesys, t, s, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
/* create side sector */
for (j = 0; j < 256; j++)
sectbuff[j] = 0;
sectbuff[0] = 0;
sectbuff[1] = 0x11; /* chars used (15 bytes header, one record) */
sectbuff[2] = 0; /* side sector number */
sectbuff[3] = rel_len; /* record length */
sectbuff[4] = st; /* first side sector track */
sectbuff[5] = ss; /* first side sector sector */
sectbuff[0x10] = tt; /* first data fork track */
sectbuff[0x11] = ts; /* first data fork sector */
if (writets (&f->filesys, st, ss, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
/* prepare first data block */
for (j = 0; j < 256; j++)
sectbuff[j] = 0;
for (j = 0; j < 254; j += rel_len)
sectbuff[j + 2] = 0xff;
j--;
if (j >= 254)
j -= rel_len;
sectbuff[0] = 0;
sectbuff[1] = 2 + j; /* one byte before last ff in block */
if (writets (&f->filesys, tt, ts, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
if (f->filesys.media == media_DHD)
{
/* prepare first super side sector */
for (j = 0; j < 256; j++)
sectbuff[j] = 0;
sectbuff[0] = st; /* first side sector in first group */
sectbuff[1] = ss;
sectbuff[2] = 0xfe; /* super side sector id */
sectbuff[3] = st; /* first side sector in first group */
sectbuff[4] = ss;
if (writets (&f->filesys, sst, sss, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
}
debug_msg ("REL file created and open\n");
return (0);
}
case cbm_DIR:
{
int j, dbt, dbs;
/* check media type */
if (f->filesys.media != media_DHD)
{
/* only DHD's may have DIR's */
set_error (76, 0, 0);
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
sectbuff[i * 32 + 2] = ft | cbm_CLOSED;
sectbuff[i * 32 + 3] = tt; /* start track */
sectbuff[i * 32 + 4] = ts; /* start sector */
sectbuff[i * 32 + 30] = 0;
sectbuff[i * 32 + 31] = 0; /* blocks in file */
/* filename (0xa0 padded) */
for (j = 0; name[j]; j++)
{
sectbuff[i * 32 + 5 + j] = name[j];
}
for (; j < 16; j++)
sectbuff[i * 32 + 5 + j] = 0xa0;
/* time/date stamp */
{
int y, m, d, h, mi, s;
gettimestamp (&y, &m, &d, &h, &mi, &s);
sectbuff[i * 32 + 23] = y % 100;
sectbuff[i * 32 + 24] = m;
sectbuff[i * 32 + 25] = d;
sectbuff[i * 32 + 26] = h;
sectbuff[i * 32 + 27] = mi;
}
/* write parent dir block back */
if (writets (&f->filesys, t, s, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
/* allocate block for dir */
if (fs_dxx_findfreeblock (&f->filesys, &dbt, &dbs))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
else
{
if (fs_dxx_allocateblock (&f->filesys, dbt, dbs))
{
/* file system is inconsistant! */
set_error (71, dbt, dbs);
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
}
for (j = 0; j < 256; j++)
sectbuff[j] = 0;
if (writets (&f->filesys, dbt, dbs, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
/* read T1 S1 to modify for dir header */
if (readts (&f->filesys, 1, 1, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
/* filename (0xa0 padded) */
for (j = 0; name[j]; j++)
{
sectbuff[4 + j] = name[j];
}
for (; j < 16; j++)
sectbuff[4 + j] = 0xa0;
/* pointer to entry in parent dir */
sectbuff[36] = t;
sectbuff[37] = s;
sectbuff[38] = 2 + (i * 32); /* index to byte in block */
/* pointer to parent dir header */
sectbuff[34] = dirtrack;
sectbuff[35] = dirsect;
/* pointer to dir block */
sectbuff[0] = dbt;
sectbuff[1] = dbs;
/* write new dir header */
if (writets (&f->filesys, tt, ts, sectbuff))
{
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (0);
/* then clean up, and close with some daft message */
break;
}
} /* end of switch(ft) */
}
}
fclose (f->filesys.fsfile);
f->filesys.fsfile=0;
return (-1);
}
int
fs_dxx_finddirblock (uchar *path, int *dirtrack, int *dirsector, uchar *fname)
{
/* find directory start track and sector (for a filesystem and subdirectories) */
/* Step 1 - find section of path which points to a file */
int i;
#ifdef AMIGA
BPTR filelock;
struct FileInfoBlock myFIB;
#else
struct stat sb;
#endif
path[strlen (path) + 1] = 0; /* for poorly inserted '/'s */
for (i = 0; i < (int)strlen (path); i++)
if (path[i] == '/')
{
path[i] = 0;
#ifdef AMIGA
if ((filelock = Lock (path, ACCESS_READ)) != 0)
{
if (Examine (filelock, &myFIB))
{
if (myFIB.fib_DirEntryType < 0)
{
path[i] = '/';
UnLock (filelock);
}
else
{
path[i] = '/';
UnLock (filelock);
break;
}
}
else
return (-1);
}
else
return (-1);
#else
stat ((char*)path, &sb);
if (sb.st_mode != S_IFREG)
path[i] = '/';
else
{
path[i] = '/';
break;
}
#endif
}
path[i] = 0;
path[i] = '/';
if (path[i + 1])
{
uchar fspath[1024], glob[256], slag[256];
strcpy ((char*)fspath, (char*)path);
strcpy ((char*)slag, (char*)&path[i + 1]);
/* now, do fs64_findfirst_g's to dissolve slag and
deposit to path, until slag is gone or a path segment
is rejected */
while (slag[0])
{
int i;
fs64_direntry de;
de.dir = 0;
glob[0] = 0;
for (i = 0; i <= (int)strlen (slag); i++)
if ((slag[i] == '/') || (slag[i] == 0))
{
/* strip from slag */
uchar temp[1024];
if (slag[i] == '/')
sprintf ((char*)temp, "%s", &slag[i + 1]);
else
temp[0] = 0;
strcpy ((char*)slag, (char*)temp);
break;
}
else
sprintf ((char*)glob, "%s%c", glob, slag[i]);
/* now fs64_findfirst it */
if (fs64_findfirst_g (fspath, glob, &de, dirtrack, dirsector))
{
/* failed! */
*dirtrack = -1;
*dirsector = -1;
fs64_closefind_g (&de);
set_error (39, 0, 0);
return (-1);
}
else
{
/* success */
fs64_closefind_g (&de);
if (slag[0] == 0)
{
/* copy first_track, first_sector from de */
*dirtrack = de.first_track;
*dirsector = de.first_sector;
strcpy ((char*)fname, (char*)de.filesys.fspath);
return (0);
}
}
} /* while(slag[0]) */
*dirtrack = -1;
*dirsector = -1;
return (-1);
}
else
{
/* no sub-dir's below disk image */
if (path[i] == '/')
path[i] = 0;
strcpy ((char*)fname, (char*)path);
switch (fs64_mediatype (path))
{
case media_D64:
*dirtrack = 18;
*dirsector = 0;
return (0);
case media_D71:
*dirtrack = 18;
*dirsector = 0;
return (0);
case media_D81:
*dirtrack = 40;
*dirsector = 0;
return (0);
case media_DHD:
*dirtrack = 1;
*dirsector = 1;
return (0);
default:
*dirtrack = -1;
*dirsector = -1;
return (-1);
}
}
}
int
fs_dxx_getopenablename (fs64_file * f, fs64_direntry * de)
{
strcpy ((char*)f->realname, (char*)de->fs);
return (0);
}
int
fs_dxx_openfile (fs64_file * f)
{
/* open for read coz this is the open file routine,
not create file */
strcpy ((char*)f->filesys.fspath, (char*)f->realname);
if ((f->filesys.fsfile = fopen ((char*)f->realname, "r")) == NULL)
{
/* couldn't open it */
/* 74,DRIVE NOT READY,00,00 */
set_error (74, 0, 0);
return (-1);
}
/* OKAY, all things are done */
f->open = 1;
return (0);
}
int
fs_dxx_findfreeblock (fs64_filesystem * fs, int *track, int *sector)
{
/* find a free block in a disk image */
switch (fs->media)
{
case media_D64:
return (fs_d64_findfreeblock (fs, track, sector));
case media_D71:
return (fs_d71_findfreeblock (fs, track, sector));
case media_D81:
return (fs_d81_findfreeblock (fs, track, sector));
case media_DHD:
return (fs_dhd_findfreeblock (fs, track, sector));
default:
set_error (74, 0, 0);
*track = -1;
*sector = -1;
return (-1);
}
}
int
fs_dxx_allocateblock (fs64_filesystem * fs, int track, int sector)
{
/* allocate a block */
switch (fs->media)
{
case media_D64:
return (fs_d64_allocateblock (fs, track, sector));
case media_D71:
return (fs_d71_allocateblock (fs, track, sector));
case media_D81:
return (fs_d81_allocateblock (fs, track, sector));
case media_DHD:
return (fs_dhd_allocateblock (fs, track, sector));
default:
set_error (38, 0, 0);
return (-1);
}
}
int
fs_dxx_openfind (fs64_direntry * de, uchar *path, int *dt, int *ds)
{
/* Dxx filesystem block */
de->filesys.media = fs64_mediatype (path);
/* copy path into the filesystem source descriptor */
strcpy ((char*)de->fs, (char*)path);
strcpy ((char*)de->realname, (char*)path);
/* now lets open it */
if ((de->filesys.fsfile = fopen ((char*)de->fs, "r+")) == NULL)
{
/* try readonly open */
if ((de->filesys.fsfile = fopen ((char*)de->fs, "r")) == NULL)
{
/* open failed */
/* 74,DRIVE NOT READY,00,00 */
set_error (74, 0, 0);
return (-1);
}
}
/*
de->track=18;
de->sector=1;
*/
/* get dir block nicely */
{
uchar temp[256];
/* get header block */
if (*dt < 1)
{
if (fs_dxx_finddirblock (de->fs, &de->track, &de->sector, temp))
return (-1);
}
else
{
de->track = *dt;
de->sector = *ds;
}
/* link to dir block */
if (readts (&de->filesys, de->track, de->sector, temp))
return (-1);
de->track = temp[0];
de->sector = temp[1];
}
de->intcount = 0;
de->active = 1;
return (0);
}
int
fs_d47_headername (uchar *path, uchar *header, uchar *id, int par, fs64_file * f)
{
uchar buff[256];
fs64_filesystem ff;
int i;
ff.fsfile = 0;
/* T18 S0 */
/* have to be general since we are using the same routine
for 1541 and 1571 */
f->filesys.media = fs64_mediatype (path);
f->de.filesys.media = f->filesys.media;
ff.media = f->filesys.media;
strcpy ((char*)ff.fspath, (char*)path);
if ((ff.fsfile = fopen ((char*)path, "r")) != NULL)
{
if (!readts (&ff, 18, 0, buff))
{
for (i = 0; i < 16; i++)
if (buff[i + 144] != 0xa0)
header[i] = buff[i + 144];
else
header[i] = 0x20;
for (i = 0; i < 5; i++)
if (buff[i + 162] != 0xa0)
id[i] = buff[162 + i];
else
id[i] = 0x20;
}
else
{
/* cant read sector - so make it up :) */
strcpy ((char*)header, "@@@@@@@@@@@@@@@@");
strcpy ((char*)id, "@@@@@");
}
fclose (ff.fsfile);
ff.fsfile=0;
return (0);
}
else
{
/* cant open file system */
strcpy ((char*)header, "@@@@@@@@@@@@@@@@");
strcpy ((char*)id, "@@@@@");
return (0);
}
}
int
fs_dxx_readblock (fs64_file * f)
{
/* all disk images are treated the same here,
as they all have a similar block structure
*/
/* read the block at curr_track & curr_sector,
recording the sector link */
if (f->curr_track < 1)
{
/* no more sectors, ergo eof */
/* 80,END OF FILE,00,00 */
set_error (80, 0, 0);
return (-1);
}
else
{
/* there are sectors left */
if (readts (&f->filesys, f->curr_track, f->curr_sector,
f->buffer))
{
/* some error occured in reading that sector */
f->be = 0;
f->bp = 0;
/* dont set error as readts will have */
return (-1);
}
else
{
/* sucessfully read next sector */
if (f->buffer[0] == 0)
{
/* there is no sector after this one */
f->curr_track = -1;
f->curr_sector = -1;
f->bp = 2;
//XXX +2 is one too much, it means position of last byte, but +2 would
//point to next free byte in block
f->be = f->buffer[1] + 1;
}
else
{
/* this sector is full, so set be=256
and copy sector links */
f->curr_track = f->buffer[0];
f->curr_sector = f->buffer[1];
f->bp = 2;
f->be = 256;
}
return (0);
} /* end of read sector bits */
} /* end of eof or not eof if then else */
}
int
fs_dxx_writeblock (fs64_file * f)
{
/* all disk images are treated the same here,
as they all have a similar block structure
*/