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Added and improved the is-this-ZX80-stuff test. It seems some bytes are going missing in the to->from tape conversion.

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This commit is contained in:
Thomas Harte 2017-06-08 19:49:18 -04:00
parent 7e10c7f9d8
commit d8b76e31c3
1 changed files with 35 additions and 2 deletions
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37
Storage/Data/ZX8081.cpp
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@ -8,6 +8,39 @@
#include "ZX8081.hpp"
std::shared_ptr<Storage::Data::ZX8081::File> Storage::Data::ZX8081::FileFromData(const std::vector<uint8_t> &data) {
return nullptr;
using namespace Storage::Data::ZX8081;
static uint16_t short_at(size_t address, const std::vector<uint8_t> &data) {
return (uint16_t)(data[address] | (data[address + 1] << 8));
}
static std::shared_ptr<File> ZX80FileFromData(const std::vector<uint8_t> &data) {
// Does this look like a ZX80 file?
// uint16_t next_line_number = short_at(0x2, data);
// uint16_t first_visible_line = short_at(0x13, data);
uint16_t vars = short_at(0x8, data);
uint16_t end_of_file = short_at(0xa, data);
uint16_t display_address = short_at(0xc, data);
// check that the end of file is contained within the supplied data
if(end_of_file - 0x4000 > 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: check that the line numbers declared above exist (?)
std::shared_ptr<File> file(new File);
file->data = data;
file->isZX81 = false;
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;
}