erius
5f9f6d2e92
Added tapeutil header and source file for sorting methods Added FileTapeSettings struct to store delay settings for a file tape
82 lines
2 KiB
C++
82 lines
2 KiB
C++
#ifndef FILE_TAPE_H
|
|
#define FILE_TAPE_H
|
|
|
|
#include "tape.h"
|
|
#include <cstdint>
|
|
#include <fstream>
|
|
#include <string>
|
|
|
|
namespace tape {
|
|
|
|
/**
|
|
* Strcuture for storing all possible settings for a file tape,
|
|
* such as read dealy, write delay etc.
|
|
*/
|
|
struct FileTapeSettings {
|
|
unsigned int readDelayMs;
|
|
unsigned int writeDelayMs;
|
|
unsigned int seekForwardDelayMs;
|
|
unsigned int seekBackwardsDelayMs;
|
|
};
|
|
|
|
/**
|
|
* Mock tape implementation that uses text files as data source.
|
|
*
|
|
* Simulates tape operations by artificially pausing the execution of some
|
|
* methods using time intervals, specified in command line arguments or a
|
|
* configuration file. Each cell is represented as a seperate line in a file,
|
|
* cell data is stored as plain text.
|
|
*/
|
|
class FileTape : public Tape {
|
|
private:
|
|
std::fstream file_;
|
|
FileTapeSettings settings_;
|
|
|
|
public:
|
|
FileTape &operator=(const FileTape &) = delete;
|
|
FileTape(const FileTape &) = delete;
|
|
FileTape(FileTape &&) = delete;
|
|
FileTape &operator=(FileTape &&) = delete;
|
|
~FileTape() override;
|
|
|
|
/**
|
|
* Initialize a new instance of FileTape that will open a file with the
|
|
* specified name. File must be read and write accessible.
|
|
*
|
|
* @param file_name Name of a file to be opened.
|
|
* @param settings File tape settings
|
|
*/
|
|
explicit FileTape(const std::string &fileName, FileTapeSettings settings);
|
|
|
|
/**
|
|
* Advances the underlying fstream to a new line.
|
|
*
|
|
* @return false if EOF is reached, otherwise true.
|
|
*/
|
|
bool seekForward() override;
|
|
|
|
/**
|
|
* Rewinds the underlying fstream to a previous line.
|
|
*
|
|
* @return false if called from the first line of a file, otherwise true.
|
|
*/
|
|
bool seekBackwards() override;
|
|
|
|
/**
|
|
* Reads and parses data from the current line.
|
|
*
|
|
* @return number from the line, or 0 if data can not be parsed.
|
|
*/
|
|
int32_t read() override;
|
|
|
|
/**
|
|
* Writes data to the current line.
|
|
*
|
|
* @param data Number, that should be written to the current line.
|
|
*/
|
|
void write(int32_t data) override;
|
|
};
|
|
|
|
} // namespace tape
|
|
|
|
#endif
|