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CLK/Storage/Tape/Formats/TapePRG.hpp

75 lines
1.4 KiB
C++

//
// TapePRG.hpp
// Clock Signal
//
// Created by Thomas Harte on 14/08/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#ifndef Storage_Tape_PRG_hpp
#define Storage_Tape_PRG_hpp
#include "../Tape.hpp"
#include "../../FileHolder.hpp"
#include <cstdint>
namespace Storage {
namespace Tape {
/*!
Provides a @c Tape containing a .PRG, which is a direct local file.
*/
class PRG: public Tape, public Storage::FileHolder {
public:
/*!
Constructs a @c T64 containing content from the file with name @c file_name, of type @c type.
@param file_name The name of the file to load.
@param type The type of data the file should contain.
@throws ErrorBadFormat if this file could not be opened and recognised as the specified type.
*/
PRG(const char *file_name);
enum {
ErrorBadFormat
};
// implemented to satisfy @c Tape
bool is_at_end();
private:
Pulse virtual_get_next_pulse();
void virtual_reset();
uint16_t load_address_;
uint16_t length_;
enum FilePhase {
FilePhaseLeadIn,
FilePhaseHeader,
FilePhaseHeaderDataGap,
FilePhaseData,
FilePhaseAtEnd
} file_phase_;
int phase_offset_;
int bit_phase_;
enum OutputToken {
Leader,
Zero,
One,
WordMarker,
EndOfBlock,
Silence
} output_token_;
void get_next_output_token();
uint8_t output_byte_;
uint8_t check_digit_;
uint8_t copy_mask_;
};
}
}
#endif /* T64_hpp */