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 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 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 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;
}