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Merge pull request #1978 from npwoods/fix_coco_dmk_image_creation

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[CoCo] Fixed a recently introduced bug in DMK image creation
This commit is contained in:
R. Belmont 2017-01-15 15:00:28 -05:00 committed by GitHub
commit 4d8258dbcb
1 changed files with 15 additions and 23 deletions
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38
src/tools/imgtool/formats/coco_dsk.cpp
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@ -723,7 +723,6 @@ static floperr_t coco_dmk_format_track(floppy_image_legacy *floppy, int head, in
uint8_t *track_data;
void *track_data_v;
uint32_t max_track_size;
std::vector<int> sector_map;
sectors = params->lookup_int(PARAM_SECTORS);
sector_length = params->lookup_int(PARAM_SECTOR_LENGTH);
@ -733,24 +732,18 @@ static floperr_t coco_dmk_format_track(floppy_image_legacy *floppy, int head, in
max_track_size = get_dmk_tag(floppy)->track_size;
if (sectors > DMK_TOC_LEN)
{
err = FLOPPY_ERROR_INTERNAL;
goto done;
}
return FLOPPY_ERROR_INTERNAL;
if (max_track_size < coco_dmk_min_track_size(sectors, sector_length))
{
err = FLOPPY_ERROR_NOSPACE;
goto done;
}
return FLOPPY_ERROR_NOSPACE;
err = floppy_load_track(floppy, head, track, true, &track_data_v, NULL);
if (err)
goto done;
return err;
track_data = (uint8_t *) track_data_v;
/* set up sector map */
memset(&sector_map[0], 0xff, sectors*sizeof(int));
// set up sector map
std::vector<int> sector_map(sectors, -1);
physical_sector = 0;
for (logical_sector = 0; logical_sector < sectors; logical_sector++)
@ -766,22 +759,22 @@ static floperr_t coco_dmk_format_track(floppy_image_legacy *floppy, int head, in
physical_sector %= sectors;
}
/* set up track table of contents */
// set up track table of contents
physical_sector = 0;
track_position = DMK_TOC_LEN * 2 + DMK_LEAD_IN;
while(physical_sector < DMK_TOC_LEN)
{
if (physical_sector >= sectors)
{
/* no more sectors */
// no more sectors
idam_offset = 0;
}
else
{
/* this is a sector */
// this is a sector
logical_sector = sector_map[physical_sector];
/* write the sector */
// write the sector
memset(&track_data[track_position], 0x00, 8);
track_position += 8;
@ -807,7 +800,7 @@ static floperr_t coco_dmk_format_track(floppy_image_legacy *floppy, int head, in
memset(&track_data[track_position], 0xA1, 3);
track_position += 3;
/* write sector body */
// write sector body
track_data[track_position] = 0xFB;
memset(&track_data[track_position + 1], floppy_get_filler(floppy), sector_length);
crc = ccitt_crc16(0xcdb4, &track_data[track_position], sector_length + 1);
@ -815,27 +808,26 @@ static floperr_t coco_dmk_format_track(floppy_image_legacy *floppy, int head, in
track_data[track_position + sector_length + 2] = (uint8_t) (crc >> 0);
track_position += sector_length + 3;
/* write sector footer */
// write sector footer
memset(&track_data[track_position], 0x4E, 24);
track_position += 24;
}
/* write the TOC entry */
// write the TOC entry
track_data[physical_sector * 2 + 0] = (uint8_t) (idam_offset >> 0);
track_data[physical_sector * 2 + 1] = (uint8_t) (idam_offset >> 8);
physical_sector++;
}
/* write track lead in */
// write track lead in
memset(&track_data[physical_sector * 2], 0x4e, DMK_LEAD_IN);
/* write track footer */
// write track footer
assert(max_track_size >= (uint32_t)track_position);
memset(&track_data[track_position], 0x4e, max_track_size - track_position);
done:
return err;
return FLOPPY_ERROR_SUCCESS;
}