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Parse the INFO record.

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This commit is contained in:
Thomas Harte 2021-12-25 18:17:13 -05:00
parent e457ce66ea
commit a6b326da48
2 changed files with 50 additions and 4 deletions
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50
Storage/Disk/DiskImage/Formats/IPF.cpp
View File

@ -39,6 +39,52 @@ IPF::IPF(const std::string &file_name) : file_(file_name) {
}
break;
case BLOCK('I', 'N', 'F', 'O'): {
// There are a lot of useful archival fields in the info chunk, which for emulation
// aren't that interesting.
// Make sure this is a floppy disk.
const uint32_t media_type = file_.get32be();
if(media_type != 1) {
throw Error::InvalidFormat;
}
// Skip: encoder type, revision, file key and revision, CRC of the original .ctr, and minimum track.
file_.seek(24, SEEK_CUR);
track_count_ = int(1 + file_.get32be());
// Skip: min side.
file_.seek(4, SEEK_CUR);
head_count_ = int(1 + file_.get32be());
// Skip: creation date, time.
file_.seek(8, SEEK_CUR);
platform_type_ = 0;
for(int c = 0; c < 4; c++) {
const uint8_t platform = file_.get8();
switch(platform) {
default: break;
case 1: platform_type_ |= TargetPlatform::Amiga; break;
case 2: platform_type_ |= TargetPlatform::AtariST; break;
/* Omitted: 3 -> IBM PC */
case 4: platform_type_ |= TargetPlatform::AmstradCPC; break;
case 5: platform_type_ |= TargetPlatform::ZXSpectrum; break;
/* Omitted: 6 -> Sam Coupé */
/* Omitted: 7 -> Archimedes */
/* Omitted: 8 -> C64 */
/* Omitted: 9 -> Atari 8-bit */
}
}
// If the file didn't declare anything, default to supporting everything.
if(!platform_type_) {
platform_type_ = ~0;
}
// Ignore: disk number, creator ID, reserved area.
} break;
case BLOCK('D', 'A', 'T', 'A'): {
length += file_.get32be();
printf("Handling DATA block at %ld of length %d\n", start_of_block, length);
@ -51,11 +97,11 @@ IPF::IPF(const std::string &file_name) : file_(file_name) {
}
HeadPosition IPF::get_maximum_head_position() {
return HeadPosition(80); // TODO;
return HeadPosition(track_count_);
}
int IPF::get_head_count() {
return 2; // TODO;
return head_count_;
}
std::shared_ptr<Track> IPF::get_track_at_position([[maybe_unused]] Track::Address address) {

4
Storage/Disk/DiskImage/Formats/IPF.hpp
View File

@ -45,9 +45,9 @@ class IPF: public DiskImage, public TargetPlatform::TypeDistinguisher {
int track_count_;
TargetPlatform::Type target_platform_type() final {
return platform_type_;
return TargetPlatform::Type(platform_type_);
}
TargetPlatform::Type platform_type_ = TargetPlatform::Amiga;
TargetPlatform::IntType platform_type_ = TargetPlatform::Amiga;
};
}