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Made an attempt to get .p/.80 checked and as far as the emulated machine.

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This commit is contained in:
Thomas Harte 2017-06-12 19:41:59 -04:00
parent b9dbb6bcf8
commit 22de481557
2 changed files with 53 additions and 8 deletions
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44
Storage/Data/ZX8081.cpp
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@ -45,8 +45,48 @@ static std::shared_ptr<File> ZX80FileFromData(const std::vector<uint8_t> &data)
return file;
}
static std::shared_ptr<File> ZX81FileFromData(const std::vector<uint8_t> &data) {
// Does this look like a ZX81 file?
// Look for a file name.
size_t data_pointer = 0;
int c = 11;
while(c--) {
if(data[data_pointer] & 0x80) break;
data_pointer++;
}
if(!c) return nullptr;
data_pointer++;
if(data.size() < data_pointer + 0x405e - 0x4009) return nullptr;
if(data[data_pointer]) return nullptr;
uint16_t vars = short_at(data_pointer + 0x4010 - 0x4009, data);
uint16_t end_of_file = short_at(data_pointer + 0x4014 - 0x4009, data);
// uint16_t display_address = short_at(0x400c - 0x4009, data);
// check that the end of file is contained within the supplied data
if(data_pointer + end_of_file - 0x4009 > data.size()) return nullptr;
// check for the proper ordering of buffers
if(vars > end_of_file) return nullptr;
// if(end_of_file > display_address) return nullptr;
// TODO: does it make sense to inspect the tokenised BASIC?
// It starts at 0x4028 and proceeds as [16-bit line number] [tokens] [0x76],
// but I'm as yet unable to find documentation of the tokens.
// TODO: check that the line numbers declared above exist (?)
std::shared_ptr<File> file(new File);
file->data = data;
file->isZX81 = true;
return file;
}
std::shared_ptr<File> Storage::Data::ZX8081::FileFromData(const std::vector<uint8_t> &data) {
std::shared_ptr<Storage::Data::ZX8081::File> result = ZX80FileFromData(data);
return result;
if(result) return result;
return ZX81FileFromData(data);
}

17
Storage/Tape/Formats/ZX80O81P.cpp
View File

@ -14,14 +14,19 @@ using namespace Storage::Tape;
ZX80O81P::ZX80O81P(const char *file_name) :
Storage::FileHolder(file_name) {
// Check that contents look like a ZX80 file
std::vector<uint8_t> whole_file((size_t)file_stats_.st_size);
fread(whole_file.data(), 1, (size_t)file_stats_.st_size, file_);
std::shared_ptr<::Storage::Data::ZX8081::File> file = Storage::Data::ZX8081::FileFromData(whole_file);
// Grab the actual file contents
data_.resize((size_t)file_stats_.st_size);
fread(data_.data(), 1, (size_t)file_stats_.st_size, file_);
if(!file || file->isZX81) throw ErrorNotZX80O81P;
// If it's a ZX81 file, prepend a file name.
char type = (char)tolower(file_name[strlen(file_name) - 1]);
if(type == 'p' || type == '1') {
// TODO, maybe: prefix a proper file name; this is leaving the file nameless.
data_.insert(data_.begin(), 0x80);
}
data_ = file->data;
std::shared_ptr<::Storage::Data::ZX8081::File> file = Storage::Data::ZX8081::FileFromData(data_);
if(!file) throw ErrorNotZX80O81P;
// then rewind and start again
virtual_reset();