/*
imghd_open()
Open stream as a MAME HD image
*/
imgtoolerr_t imghd_open(imgtool_stream *stream, struct mess_hard_disk_file *hard_disk)
{
imgtoolerr_t err = IMGTOOLERR_SUCCESS;
char encoded_image_ref[encoded_image_ref_max_len];
chd_interface interface_save;
hard_disk->hard_disk = NULL;
hard_disk->chd = NULL;
encode_image_ref(stream, encoded_image_ref);
/* use our CHD interface */
chd_save_interface(&interface_save);
chd_set_interface(&imgtool_chd_interface);
hard_disk->chd = chd_open(encoded_image_ref, !stream_isreadonly(stream), NULL);
if (!hard_disk->chd)
{
err = imghd_chd_getlasterror();
goto done;
}
hard_disk->hard_disk = hard_disk_open(hard_disk->chd);
if (!hard_disk->hard_disk)
{
err = IMGTOOLERR_UNEXPECTED;
goto done;
}
hard_disk->stream = stream;
done:
if (err)
imghd_close(hard_disk);
chd_set_interface(&interface_save);
return err;
}
/*
imghd_open()
Open stream as a MAME HD image
*/
imgtoolerr_t imghd_open(imgtool_stream *stream, struct mess_hard_disk_file *hard_disk)
{
chd_error chderr;
imgtoolerr_t err = IMGTOOLERR_SUCCESS;
char encoded_image_ref[encoded_image_ref_max_len];
chd_interface interface_save;
hard_disk->hard_disk = NULL;
hard_disk->chd = NULL;
encode_image_ref(stream, encoded_image_ref);
/* use our CHD interface */
chd_save_interface(&interface_save);
chd_set_interface(&imgtool_chd_interface);
chderr = chd_open(encoded_image_ref, stream_isreadonly(stream) ? CHD_OPEN_READ : CHD_OPEN_READWRITE, NULL, &hard_disk->chd);
if (chderr)
{
err = map_chd_error(chderr);
goto done;
}
hard_disk->hard_disk = hard_disk_open(hard_disk->chd);
if (!hard_disk->hard_disk)
{
err = IMGTOOLERR_UNEXPECTED;
goto done;
}
hard_disk->stream = stream;
done:
if (err)
imghd_close(hard_disk);
chd_set_interface(&interface_save);
return err;
}
/*
imghd_create()
Create a MAME HD image
*/
imgtoolerr_t imghd_create(imgtool_stream *stream, UINT32 hunksize, UINT32 cylinders, UINT32 heads, UINT32 sectors, UINT32 seclen)
{
imgtoolerr_t err = IMGTOOLERR_SUCCESS;
char encoded_image_ref[encoded_image_ref_max_len];
chd_interface interface_save;
UINT8 *cache = NULL;
chd_file *chd = NULL;
int rc;
UINT64 logicalbytes;
int hunknum, totalhunks;
char metadata[256];
/* jump through the hoops as required by the CHD system */
encode_image_ref(stream, encoded_image_ref);
chd_save_interface(&interface_save);
chd_set_interface(&imgtool_chd_interface);
/* sanity check args */
if (hunksize >= 2048)
{
err = IMGTOOLERR_PARAMCORRUPT;
goto done;
}
if (hunksize <= 0)
hunksize = 1024; /* default value */
/* bail if we are read only */
if (stream_isreadonly(stream))
{
err = IMGTOOLERR_READONLY;
goto done;
}
/* calculations */
logicalbytes = (UINT64)cylinders * heads * sectors * seclen;
/* create the new hard drive */
rc = chd_create(encoded_image_ref, logicalbytes, hunksize, CHDCOMPRESSION_NONE, NULL);
if (rc != CHDERR_NONE)
{
err = map_chd_error(rc);
goto done;
}
/* open the new hard drive */
rc = chd_open(encoded_image_ref, CHD_OPEN_READWRITE, NULL, &chd);
if (rc != CHDERR_NONE)
{
err = map_chd_error(rc);
goto done;
}
/* write the metadata */
sprintf(metadata, HARD_DISK_METADATA_FORMAT, cylinders, heads, sectors, seclen);
err = chd_set_metadata(chd, HARD_DISK_METADATA_TAG, 0, metadata, strlen(metadata) + 1);
if (rc != CHDERR_NONE)
{
err = map_chd_error(rc);
goto done;
}
/* alloc and zero buffer */
cache = malloc(hunksize);
if (!cache)
{
err = IMGTOOLERR_OUTOFMEMORY;
goto done;
}
memset(cache, '\0', hunksize);
/* zero out every hunk */
totalhunks = (logicalbytes + hunksize - 1) / hunksize;
for (hunknum = 0; hunknum < totalhunks; hunknum++)
{
rc = chd_write(chd, hunknum, cache);
if (rc)
{
err = IMGTOOLERR_WRITEERROR;
goto done;
}
}
done:
if (cache)
free(cache);
if (chd)
chd_close(chd);
chd_set_interface(&interface_save);
return err;
}
