diff options
Diffstat (limited to 'src/lib/formats/dcp_dsk.cpp')
-rw-r--r-- | src/lib/formats/dcp_dsk.cpp | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/src/lib/formats/dcp_dsk.cpp b/src/lib/formats/dcp_dsk.cpp index 179552409f8..dfc9eea27dc 100644 --- a/src/lib/formats/dcp_dsk.cpp +++ b/src/lib/formats/dcp_dsk.cpp @@ -2,7 +2,7 @@ // copyright-holders:Fabio Priuli /********************************************************************* - formats/dcp_dsk.h + formats/dcp_dsk.cpp PC98 DCP & DCU disk images @@ -20,37 +20,41 @@ *********************************************************************/ -#include <assert.h> - #include "dcp_dsk.h" +#include "ioprocs.h" + + dcp_format::dcp_format() { } -const char *dcp_format::name() const +const char *dcp_format::name() const noexcept { return "dcx"; } -const char *dcp_format::description() const +const char *dcp_format::description() const noexcept { return "DCP/DCU disk image"; } -const char *dcp_format::extensions() const +const char *dcp_format::extensions() const noexcept { return "dcp,dcu"; } -int dcp_format::identify(io_generic *io, uint32_t form_factor) +int dcp_format::identify(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants) const { - uint64_t size = io_generic_size(io); + uint64_t size; + if (io.length(size)) + return 0; + uint8_t h[0xa2]; int heads, tracks, spt, bps, count_tracks = 0; bool is_hdb = false; - io_generic_read(io, h, 0, 0xa2); + /*auto const [err, actual] =*/ read_at(io, 0, h, 0xa2); // FIXME: check for errors and premature EOF // First byte is the disk format (see below in load() for details) switch (h[0]) @@ -103,22 +107,22 @@ int dcp_format::identify(io_generic *io, uint32_t form_factor) // in theory track map should be enough (former check), but some images have it wrong! // hence, if this check fails, we also allow for images with all tracks and wrong track map if (size - 0xa2 == (heads * count_tracks * spt * bps) || size - 0xa2 == (heads * tracks * spt * bps)) - return 100; + return FIFID_STRUCT|FIFID_SIZE; // for disk type 0x11 the head 0 track 0 has 26 sectors of half width, so we need to compensate calculation if (is_hdb && (size - 0xa2 + (0x80 * 26) == (heads * count_tracks * spt * bps) || size - 0xa2 + (0x80 * 26) == (heads * tracks * spt * bps))) - return 100; + return FIFID_STRUCT|FIFID_SIZE; return 0; } -bool dcp_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) +bool dcp_format::load(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants, floppy_image &image) const { uint8_t h[0xa2]; int heads, tracks, spt, bps; bool is_hdb = false; - io_generic_read(io, h, 0, 0xa2); + /*auto const [err, actual] =*/ read_at(io, 0, h, 0xa2); // FIXME: check for errors and premature EOF // First byte is the disk format: switch (h[0]) @@ -215,7 +219,7 @@ bool dcp_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) for (int track = 0; track < tracks; track++) for (int head = 0; head < heads; head++) { - io_generic_read(io, sect_data, 0xa2 + bps * spt * (track * heads + head), bps * spt); + /*auto const [err, actual] =*/ read_at(io, 0xa2 + bps * spt * (track * heads + head), sect_data, bps * spt); // FIXME: check for errors and premature EOF for (int i = 0; i < spt; i++) { @@ -235,7 +239,7 @@ bool dcp_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) else // FIXME: the code below is untested, because no image was found... there might be some silly mistake in the disk geometry! { // Read Head 0 Track 0 is FM with 26 sectors of 128bytes instead of 256 - io_generic_read(io, sect_data, 0xa2, 128 * spt); + /*auto const [err, actual] =*/ read_at(io, 0xa2, sect_data, 128 * spt); // FIXME: check for errors and premature EOF for (int i = 0; i < spt; i++) { @@ -252,7 +256,7 @@ bool dcp_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) build_pc_track_fm(0, 0, image, cell_count, spt, sects, calc_default_pc_gap3_size(form_factor, 128)); // Read Head 1 Track 0 is MFM with 26 sectors of 256bytes - io_generic_read(io, sect_data, 0xa2 + 128 * spt, bps * spt); + /*auto const [err, actual] =*/ read_at(io, 0xa2 + 128 * spt, sect_data, bps * spt); // FIXME: check for errors and premature EOF for (int i = 0; i < spt; i++) { @@ -273,7 +277,7 @@ bool dcp_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) for (int track = 1; track < tracks; track++) for (int head = 0; head < heads; head++) { - io_generic_read(io, sect_data, data_offs + bps * spt * ((track - 1) * heads + head), bps * spt); + /*auto const [err, actual] =*/ read_at(io, data_offs + bps * spt * ((track - 1) * heads + head), sect_data, bps * spt); // FIXME: check for errors and premature EOF for (int i = 0; i < spt; i++) { @@ -294,9 +298,9 @@ bool dcp_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) return true; } -bool dcp_format::supports_save() const +bool dcp_format::supports_save() const noexcept { return false; } -const floppy_format_type FLOPPY_DCP_FORMAT = &floppy_image_format_creator<dcp_format>; +const dcp_format FLOPPY_DCP_FORMAT; |