63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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#ifndef FILE_TAPE_H
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#define FILE_TAPE_H
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#include "tape.h"
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#include <cstdint>
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#include <fstream>
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#include <string>
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/**
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* Mock tape implementation that uses text files as data source.
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*
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* Simulates tape operations by artificially pausing the execution of some methods
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* using time intervals, specified in command line arguments or a configuration file.
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* Each cell is represented as a seperate line in a file, cell data is stored as plain text.
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*/
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class FileTape : public Tape {
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private:
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std::fstream file;
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public:
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/**
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* Initialize a new instance of FileTape that will open a file with the specified name.
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* File must be read and write accessible.
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*
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* @param file_name Name of a file to be opened.
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*/
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FileTape(std::string file_name);
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/**
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* Advances the underlying fstream to a new line.
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*
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* @return false if EOF is reached, otherwise true.
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*/
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bool seekForward() override;
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/**
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* Rewinds the underlying fstream to a previous line.
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*
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* @return false if called from the first line of a file, otherwise true.
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*/
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bool seekBackwards() override;
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/**
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* Reads and parses data from the current line.
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*
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* @return number from the line, or 0 if data can not be parsed.
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*/
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int32_t read() override;
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/**
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* Writes data to the current line.
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*
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* @param data Number, that should be written to the current line.
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*/
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void write(int32_t data) override;
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/**
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* Closes the underlying fstream
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*/
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~FileTape() override;
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};
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#endif
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