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86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
//
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// Tape.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 06/11/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "Tape.hpp"
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#include "../../Storage/Tape/Parsers/Oric.hpp"
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using namespace StaticAnalyser::Oric;
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std::list<File> StaticAnalyser::Oric::GetFiles(const std::shared_ptr<Storage::Tape::Tape> &tape) {
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std::list<File> files;
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Storage::Tape::Oric::Parser parser;
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while(!tape->is_at_end()) {
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// sync to next lead-in, check that it's one of three 0x16s
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bool is_fast = parser.sync_and_get_encoding_speed(tape);
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int next_bytes[2];
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next_bytes[0] = parser.get_next_byte(tape, is_fast);
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next_bytes[1] = parser.get_next_byte(tape, is_fast);
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if(next_bytes[0] != 0x16 || next_bytes[1] != 0x16) continue;
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// get the first byte that isn't a 0x16, check it was a 0x24
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int byte = 0x16;
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while(!tape->is_at_end() && byte == 0x16) {
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byte = parser.get_next_byte(tape, is_fast);
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}
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if(byte != 0x24) continue;
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// skip two empty bytes
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parser.get_next_byte(tape, is_fast);
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parser.get_next_byte(tape, is_fast);
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// get data and launch types
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File new_file;
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switch(parser.get_next_byte(tape, is_fast)) {
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case 0x00: new_file.data_type = File::ProgramType::BASIC; break;
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case 0x80: new_file.data_type = File::ProgramType::MachineCode; break;
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default: new_file.data_type = File::ProgramType::None; break;
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}
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switch(parser.get_next_byte(tape, is_fast)) {
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case 0x80: new_file.launch_type = File::ProgramType::BASIC; break;
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case 0xc7: new_file.launch_type = File::ProgramType::MachineCode; break;
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default: new_file.launch_type = File::ProgramType::None; break;
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}
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// read end and start addresses
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new_file.ending_address = (uint16_t)(parser.get_next_byte(tape, is_fast) << 8);
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new_file.ending_address |= (uint16_t)parser.get_next_byte(tape, is_fast);
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new_file.starting_address = (uint16_t)(parser.get_next_byte(tape, is_fast) << 8);
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new_file.starting_address |= (uint16_t)parser.get_next_byte(tape, is_fast);
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// skip an empty byte
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parser.get_next_byte(tape, is_fast);
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// read file name, up to 16 characters and null terminated
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char file_name[17];
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int name_pos = 0;
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while(name_pos < 16) {
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file_name[name_pos] = (char)parser.get_next_byte(tape, is_fast);
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if(!file_name[name_pos]) break;
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name_pos++;
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}
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file_name[16] = '\0';
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new_file.name = file_name;
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// read body
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size_t body_length = new_file.ending_address - new_file.starting_address + 1;
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new_file.data.reserve(body_length);
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for(size_t c = 0; c < body_length; c++) {
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new_file.data.push_back((uint8_t)parser.get_next_byte(tape, is_fast));
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}
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// only one validation check: was there enough tape?
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if(!tape->is_at_end()) {
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files.push_back(new_file);
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}
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}
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return files;
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}
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