static imgtoolerr_t delete_entry(imgtool::image &img, rsdos_dirent &ent, int pos)
{
floperr_t ferr;
unsigned char g, i;
uint8_t granule_count;
uint8_t granule_map[MAX_GRANULEMAP_SIZE];
// write a NUL in the filename, marking it deleted
ent.filename[0] = 0;
ferr = put_rsdos_dirent(img, pos, ent);
if (ferr)
return imgtool_floppy_error(ferr);
ferr = get_granule_map(img, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
// now free up the granules
g = ent.first_granule;
while (g < granule_count)
{
i = granule_map[g];
granule_map[g] = 0xff;
g = i;
}
ferr = put_granule_map(img, granule_map, granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t delete_entry(imgtool_image *img, struct rsdos_dirent *ent, int pos)
{
floperr_t ferr;
unsigned char g, i;
UINT8 granule_count;
UINT8 granule_map[MAX_GRANULEMAP_SIZE];
/* Write a NUL in the filename, marking it deleted */
ent->fname[0] = 0;
ferr = put_rsdos_dirent(img, pos, ent);
if (ferr)
return imgtool_floppy_error(ferr);
ferr = get_granule_map(img, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
/* Now free up the granules */
g = ent->first_granule;
while (g < granule_count)
{
i = granule_map[g];
granule_map[g] = 0xff;
g = i;
}
ferr = put_granule_map(img, granule_map, granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t process_rsdos_file(struct rsdos_dirent *ent, imgtool_image *img, imgtool_stream *destf, size_t *size)
{
floperr_t ferr;
size_t s, lastgransize;
UINT8 granule_count;
unsigned char i = 0, granule;
UINT8 usedmap[MAX_GRANULEMAP_SIZE]; /* Used to detect infinite loops */
UINT8 granule_map[MAX_GRANULEMAP_SIZE];
ferr = get_granule_map(img, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
memset(usedmap, 0, granule_count);
lastgransize = ent->lastsectorbytes_lsb + (((int) ent->lastsectorbytes_msb) << 8);
s = 0;
granule = ent->first_granule;
while(!usedmap[granule] && ((i = granule_map[granule]) < granule_count))
{
usedmap[granule] = 1;
if (destf)
transfer_from_granule(img, granule, 9*256, destf);
/* i is the next granule */
s += (256 * 9);
granule = i;
}
if ((i < 0xc0) || (i > 0xc9))
return IMGTOOLERR_CORRUPTIMAGE;
if (lastgransize)
i--;
lastgransize += (256 * (i - 0xc0));
if (destf)
transfer_from_granule(img, granule, lastgransize, destf);
if (size)
*size = s + lastgransize;
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t rsdos_diskimage_freespace(imgtool::partition &partition, uint64_t *size)
{
floperr_t ferr;
uint8_t i;
size_t s = 0;
uint8_t granule_count;
uint8_t granule_map[MAX_GRANULEMAP_SIZE];
imgtool::image &image(partition.image());
ferr = get_granule_map(image, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
for (i = 0; i < granule_count; i++)
{
if (granule_map[i] == 0xff)
s += (9 * 256);
}
*size = s;
return (imgtoolerr_t)FLOPPY_ERROR_SUCCESS;
}
static imgtoolerr_t rsdos_diskimage_freespace(imgtool_partition *partition, UINT64 *size)
{
floperr_t ferr;
UINT8 i;
size_t s = 0;
UINT8 granule_count;
UINT8 granule_map[MAX_GRANULEMAP_SIZE];
imgtool_image *image = imgtool_partition_image(partition);
ferr = get_granule_map(image, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
for (i = 0; i < granule_count; i++)
{
if (granule_map[i] == 0xff)
s += (9 * 256);
}
*size = s;
return (imgtoolerr_t)FLOPPY_ERROR_SUCCESS;
}
static imgtoolerr_t list_granules(struct bml3_dirent *ent, imgtool_image *img, struct granule_list_t *granule_list)
{
floperr_t ferr;
UINT8 max_granules;
UINT8 granule;
UINT8 usedmap[MAX_GRANULEMAP_SIZE]; /* Used to detect infinite loops */
UINT8 granule_map[MAX_GRANULEMAP_SIZE];
bml3_diskinfo *info = bml3_get_diskinfo(img);
ferr = get_granule_map(img, granule_map, &max_granules);
if (ferr)
return imgtool_floppy_error(ferr);
memset(usedmap, 0, max_granules);
granule = ent->first_granule;
granule_list->granule_count = 0;
while(!usedmap[granule] && granule < max_granules)
{
usedmap[granule] = 1;
granule_list->granules[granule_list->granule_count++] = granule;
granule = granule_map[granule];
}
granule_list->last_granule_sectors = granule - 0xc0;
if (info->variant == 0) {
// add final incomplete sector
granule_list->last_granule_sectors++;
}
// A value of zero (variant 1) and max (variant 0) seem to indicate a file open for writing.
// Strictly speaking this means the image is corrupt, although a real system will happily read
// garbage from the file.
if (granule_list->last_granule_sectors > info->granule_sectors)
return IMGTOOLERR_CORRUPTIMAGE;
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t rsdos_diskimage_writefile(imgtool::partition &partition, const char *fname, const char *fork, imgtool::stream &sourcef, util::option_resolution *writeoptions)
{
floperr_t ferr;
imgtoolerr_t err;
imgtool::image &img(partition.image());
struct rsdos_dirent ent, ent2;
size_t i;
uint64_t sz;
uint64_t freespace = 0;
unsigned char g;
unsigned char *gptr;
uint8_t granule_count;
uint8_t granule_map[MAX_GRANULEMAP_SIZE];
// can we write to this image?
if (floppy_is_read_only(imgtool_floppy(img)))
return IMGTOOLERR_READONLY;
err = rsdos_diskimage_freespace(partition, &freespace);
if (err)
return err;
// is there enough space?
sz = sourcef.size();
if (sz > freespace)
return IMGTOOLERR_NOSPACE;
// setup our directory entry
err = prepare_dirent(ent, fname);
if (err)
return err;
ent.ftype = writeoptions->lookup_int(RSDOS_OPTIONS_FTYPE);
ent.asciiflag = uint8_t(writeoptions->lookup_int(RSDOS_OPTIONS_ASCII)) - 1;
ent.lastsectorbytes_lsb = sz % 256;
ent.lastsectorbytes_msb = (((sz % 256) == 0) && (sz > 0)) ? 1 : 0;
gptr = &ent.first_granule;
ferr = get_granule_map(img, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
g = 0x00;
do
{
while (granule_map[g] != 0xff)
{
g++;
if ((g >= granule_count) || (g == 0))
return IMGTOOLERR_UNEXPECTED; // we should have already verified that there is enough space
}
*gptr = g;
gptr = &granule_map[g];
i = std::min(sz, uint64_t(9*256));
err = transfer_to_granule(img, g, i, sourcef);
if (err)
return err;
sz -= i;
// go to next granule
g++;
}
while(sz > 0);
// now that we are done with the file, we need to specify the final entry
// in the file allocation table
*gptr = 0xc0 + ((i + 255) / 256);
// now we need to find an empty directory entry
i = -1;
do
{
ferr = get_rsdos_dirent(img, ++i, ent2);
if (ferr)
return imgtool_floppy_error(ferr);
}
while((ent2.filename[0] != '\0') && strcmp(ent.filename, ent2.filename) && (ent2.filename[0] != -1));
// delete file if it already exists
if (ent2.filename[0] && (ent2.filename[0] != -1))
{
err = delete_entry(img, ent2, i);
if (err)
return err;
}
ferr = put_rsdos_dirent(img, i, ent);
if (ferr)
return imgtool_floppy_error(ferr);
// write the granule map back out
ferr = put_granule_map(img, granule_map, granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t bml3_diskimage_writefile(imgtool_partition *partition, const char *fname, const char *fork, imgtool_stream *sourcef, option_resolution *writeoptions)
{
floperr_t ferr;
imgtoolerr_t err;
imgtool_image *img = imgtool_partition_image(partition);
bml3_diskinfo *info = bml3_get_diskinfo(img);
struct bml3_dirent ent, ent2;
size_t i;
UINT64 sz, read_sz;
UINT64 freespace = 0;
unsigned char g;
unsigned char *gptr;
UINT8 granule_count;
UINT8 granule_map[MAX_GRANULEMAP_SIZE];
UINT8 eof_buf[MAX_SECTOR_SIZE];
// one-time setup of eof_buf
memset(eof_buf, 0, sizeof(eof_buf));
eof_buf[0] = 0x1A;
/* can we write to this image? */
if (floppy_is_read_only(imgtool_floppy(img)))
return IMGTOOLERR_READONLY;
err = bml3_diskimage_freespace(partition, &freespace);
if (err)
return err;
/* is there enough space? */
sz = read_sz = stream_size(sourcef);
if (info->variant == 0) {
// also need to write EOF
sz++;
}
if (sz > freespace)
return IMGTOOLERR_NOSPACE;
/* setup our directory entry */
err = prepare_dirent(info->variant, &ent, fname);
if (err)
return err;
ent.ftype = option_resolution_lookup_int(writeoptions, BML3_OPTIONS_FTYPE);
ent.asciiflag = ((UINT8) option_resolution_lookup_int(writeoptions, BML3_OPTIONS_ASCII)) - 1;
gptr = &ent.first_granule;
ferr = get_granule_map(img, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
g = 0x00;
do
{
while (granule_map[g] != 0xff)
{
g++;
if ((g >= granule_count) || (g == 0))
return IMGTOOLERR_UNEXPECTED; /* We should have already verified that there is enough space */
}
*gptr = g;
gptr = &granule_map[g];
i = MIN(read_sz, info->granule_sectors * info->sector_size);
if (i > 0) {
err = transfer_to_granule(img, g, i, sourcef);
if (err)
return err;
read_sz -= i;
sz -= i;
}
if (i < info->granule_sectors * info->sector_size && sz > 0) {
// write EOF and trailing NULs in the final sector
ferr = write_granule(img, g, i, (info->granule_sectors * info->sector_size - i - 1) % info->sector_size + 1, eof_buf);
if (ferr)
return imgtool_floppy_error(ferr);
sz--;
i++;
}
/* Go to next granule */
g++;
}
while(sz > 0);
/* Now that we are done with the file, we need to specify the final entry
* in the file allocation table
*/
*gptr = 0xc0 + ((i + info->sector_size-1) / info->sector_size) - (info->variant == 0 ? 1 : 0);
ent.lastsectorbytes = (i - 1) % info->sector_size + 1;
/* delete file if it already exists */
err = bml3_diskimage_deletefile(partition, fname);
if (err && err != IMGTOOLERR_FILENOTFOUND)
return err;
/* Now we need to find an empty directory entry */
i = -1;
do
{
ferr = get_bml3_dirent(img, ++i, &ent2);
if (ferr)
return imgtool_floppy_error(ferr);
}
while(ent2.fname[0] != '\0' && ent2.fname[0] != -1);
ferr = put_bml3_dirent(img, i, &ent);
if (ferr)
return imgtool_floppy_error(ferr);
/* write the granule map back out */
ferr = put_granule_map(img, granule_map, granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t rsdos_diskimage_writefile(imgtool_partition *partition, const char *fname, const char *fork, imgtool_stream *sourcef, option_resolution *writeoptions)
{
floperr_t ferr;
imgtoolerr_t err;
imgtool_image *img = imgtool_partition_image(partition);
struct rsdos_dirent ent, ent2;
size_t i;
UINT64 sz;
UINT64 freespace = 0;
unsigned char g;
unsigned char *gptr;
UINT8 granule_count;
UINT8 granule_map[MAX_GRANULEMAP_SIZE];
/* can we write to this image? */
if (floppy_is_read_only(imgtool_floppy(img)))
return IMGTOOLERR_READONLY;
err = rsdos_diskimage_freespace(partition, &freespace);
if (err)
return err;
/* is there enough space? */
sz = stream_size(sourcef);
if (sz > freespace)
return IMGTOOLERR_NOSPACE;
/* setup our directory entry */
err = prepare_dirent(&ent, fname);
if (err)
return err;
ent.ftype = option_resolution_lookup_int(writeoptions, RSDOS_OPTIONS_FTYPE);
ent.asciiflag = ((UINT8) option_resolution_lookup_int(writeoptions, RSDOS_OPTIONS_ASCII)) - 1;
ent.lastsectorbytes_lsb = sz % 256;
ent.lastsectorbytes_msb = (((sz % 256) == 0) && (sz > 0)) ? 1 : 0;
gptr = &ent.first_granule;
ferr = get_granule_map(img, granule_map, &granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
g = 0x00;
do
{
while (granule_map[g] != 0xff)
{
g++;
if ((g >= granule_count) || (g == 0))
return IMGTOOLERR_UNEXPECTED; /* We should have already verified that there is enough space */
}
*gptr = g;
gptr = &granule_map[g];
i = MIN(sz, (9*256));
err = transfer_to_granule(img, g, i, sourcef);
if (err)
return err;
sz -= i;
/* Go to next granule */
g++;
}
while(sz > 0);
/* Now that we are done with the file, we need to specify the final entry
* in the file allocation table
*/
*gptr = 0xc0 + ((i + 255) / 256);
/* Now we need to find an empty directory entry */
i = -1;
do
{
ferr = get_rsdos_dirent(img, ++i, &ent2);
if (ferr)
return imgtool_floppy_error(ferr);
}
while((ent2.fname[0] != '\0') && strcmp(ent.fname, ent2.fname) && (ent2.fname[0] != -1));
/* delete file if it already exists */
if (ent2.fname[0] && (ent2.fname[0] != -1))
{
err = delete_entry(img, &ent2, i);
if (err)
return err;
}
ferr = put_rsdos_dirent(img, i, &ent);
if (ferr)
return imgtool_floppy_error(ferr);
/* write the granule map back out */
ferr = put_granule_map(img, granule_map, granule_count);
if (ferr)
return imgtool_floppy_error(ferr);
return IMGTOOLERR_SUCCESS;
}
