diff options
Diffstat (limited to 'src/lib/formats/nfd_dsk.cpp')
-rw-r--r-- | src/lib/formats/nfd_dsk.cpp | 59 |
1 files changed, 34 insertions, 25 deletions
diff --git a/src/lib/formats/nfd_dsk.cpp b/src/lib/formats/nfd_dsk.cpp index 4d9d8fab980..a51b461e144 100644 --- a/src/lib/formats/nfd_dsk.cpp +++ b/src/lib/formats/nfd_dsk.cpp @@ -2,7 +2,7 @@ // copyright-holders:Fabio Priuli /********************************************************************* - formats/nfd_dsk.h + formats/nfd_dsk.cpp PC98 NFD disk images (info from: http://www.geocities.jp/t98next/dev.html ) @@ -77,46 +77,55 @@ *********************************************************************/ - #include <assert.h> - #include "nfd_dsk.h" +#include "ioprocs.h" + +#include "osdcomm.h" // little_endianize_int* + +#include <cstring> + + nfd_format::nfd_format() { } -const char *nfd_format::name() const +const char *nfd_format::name() const noexcept { return "nfd"; } -const char *nfd_format::description() const +const char *nfd_format::description() const noexcept { return "NFD disk image"; } -const char *nfd_format::extensions() const +const char *nfd_format::extensions() const noexcept { return "nfd"; } -int nfd_format::identify(io_generic *io, uint32_t form_factor) +int nfd_format::identify(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants) const { uint8_t h[16]; - io_generic_read(io, h, 0, 16); + auto const [err, actual] = read_at(io, 0, h, 16); // TODO: does it really need 16 bytes? it only looks at 14. + if (err || (16 != actual)) + return 0; - if (strncmp((const char *)h, "T98FDDIMAGE.R0", 14) == 0 || strncmp((const char *)h, "T98FDDIMAGE.R1", 14) == 0) - return 100; + if (!memcmp(h, "T98FDDIMAGE.R0", 14) || !memcmp(h, "T98FDDIMAGE.R1", 14)) + return FIFID_SIGN; return 0; } -bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) +bool nfd_format::load(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants, floppy_image &image) const { - uint64_t size = io_generic_size(io); + uint64_t size; + if (io.length(size)) + return false; uint8_t h[0x120], hsec[0x10]; - io_generic_read(io, h, 0, 0x120); - int format_version = !strncmp((const char *)h, "T98FDDIMAGE.R0", 14) ? 0 : 1; + read_at(io, 0, h, 0x120); // FIXME: check for errors and premature EOF + int format_version = !memcmp(h, "T98FDDIMAGE.R0", 14) ? 0 : 1; // sector map (the 164th entry is only used by rev.1 format, loops with track < 163 are correct for rev.0) uint8_t disk_type = 0; @@ -140,7 +149,7 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { int curr_track_size = 0; // read sector map absolute location - io_generic_read(io, hsec, pos, 4); + read_at(io, pos, hsec, 4); // FIXME: check for errors and premature EOF pos += 4; uint32_t secmap_addr = little_endianize_int32(*(uint32_t *)(hsec)); @@ -149,14 +158,14 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) // read actual sector map for the sectors of this track // for rev.1 format the first 0x10 are a track summary: // first WORD is # of sectors, second WORD is # of special data sectors - io_generic_read(io, hsec, secmap_addr, 0x10); + read_at(io, secmap_addr, hsec, 0x10); // FIXME: check for errors and premature EOF secmap_addr += 0x10; num_secs[track] = little_endianize_int16(*(uint16_t *)(hsec)); num_specials[track] = little_endianize_int16(*(uint16_t *)(hsec + 0x2)); for (int sect = 0; sect < num_secs[track]; sect++) { - io_generic_read(io, hsec, secmap_addr, 0x10); + read_at(io, secmap_addr, hsec, 0x10); // FIXME: check for errors and premature EOF if (track == 0 && sect == 0) disk_type = hsec[0xb]; // can this change across the disk? I don't think so... @@ -175,7 +184,7 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { for (int sect = 0; sect < num_specials[track]; sect++) { - io_generic_read(io, hsec, secmap_addr, 0x10); + read_at(io, secmap_addr, hsec, 0x10); // FIXME: check for errors and premature EOF secmap_addr += 0x10; curr_track_size += (hsec[9] + 1) * little_endianize_int32(*(uint32_t *)(hsec + 0x0a)); } @@ -198,7 +207,7 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { // read sector map for this sector // for rev.0 format each sector uses 0x10 bytes - io_generic_read(io, hsec, pos, 0x10); + read_at(io, pos, hsec, 0x10); // FIXME: check for errors and premature EOF if (track == 0 && sect == 0) disk_type = hsec[0xa]; // can this change across the disk? I don't think so... @@ -228,13 +237,13 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) switch (disk_type) { case 0x10: // 640K disk, 2DD - image->set_variant(floppy_image::DSDD); + image.set_variant(floppy_image::DSDD); break; //case 0x30: // 1.44M disk, ?? (no images found) // break; case 0x90: // 1.2M disk, 2HD default: - image->set_variant(floppy_image::DSHD); + image.set_variant(floppy_image::DSHD); break; } @@ -245,7 +254,7 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) for (int track = 0; track < 163 && pos < size; track++) { - io_generic_read(io, sect_data, pos, track_sizes[track]); + read_at(io, pos, sect_data, track_sizes[track]); // FIXME: check for errors and premature EOF for (int i = 0; i < num_secs[track]; i++) { @@ -268,15 +277,15 @@ bool nfd_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) if (mfm[track * 26]) build_pc_track_mfm(track / 2, track % 2, image, cell_count, num_secs[track], sects, calc_default_pc_gap3_size(form_factor, (128 << sec_sizes[track * 26]))); else - build_pc_track_fm(track / 2, track % 2, image, cell_count, num_secs[track], sects, calc_default_pc_gap3_size(form_factor, (128 << sec_sizes[track * 26]))); + build_pc_track_fm(track / 2, track % 2, image, cell_count / 2, num_secs[track], sects, calc_default_pc_gap3_size(form_factor, (128 << sec_sizes[track * 26]))); } return true; } -bool nfd_format::supports_save() const +bool nfd_format::supports_save() const noexcept { return false; } -const floppy_format_type FLOPPY_NFD_FORMAT = &floppy_image_format_creator<nfd_format>; +const nfd_format FLOPPY_NFD_FORMAT; |