#ifndef READER_H
#define READER_H

#include <string>
#include <cstdint>

// Abstract Reader class: read bytes/strings from a source (file, string, etc.)
class Reader {
public:
    virtual ~Reader() = default;
    // return 0..255 on success, -1 on EOF/error
    virtual int readByte() = 0;
    // read exactly len bytes into buf; return true on success
    virtual bool readBytes(uint8_t* buf, size_t len) = 0;
    // read up to len bytes into a std::string; may return shorter string on EOF
    virtual std::string readString(size_t len) = 0;
    // read a line (up to newline), return empty string on EOF
    virtual std::string readLine() = 0;
};

#endif // READER_H