RawFileWriter.hpp

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#ifndef BYTEME_RAW_FILE_WRITER_HPP
#define BYTEME_RAW_FILE_WRITER_HPP
 
#include <vector>
#include <stdexcept>
#include <cstdio>
#include <cstddef>
#include <optional>
 
#include "Writer.hpp"
#include "SelfClosingFILE.hpp"
 
namespace byteme {
 
struct RawFileWriterOptions {
    std::optional<std::size_t> bufsiz;
};
 
class RawFileWriter final : public Writer {
public:
    RawFileWriter(const char* path, const RawFileWriterOptions& options) : my_file(path, "wb") {
        set_optional_bufsiz(my_file, options.bufsiz);
    }
 
public:
    using Writer::write;
 
    void write(const unsigned char* buffer, std::size_t n) {
        std::size_t ok = std::fwrite(buffer, sizeof(unsigned char), n, my_file.handle);
        if (ok < n) {
            throw std::runtime_error("failed to write raw binary file (fwrite error " + std::to_string(std::ferror(my_file.handle)) + ")");
        }
    }
 
    void finish() {
        if (std::fclose(my_file.handle)) {
            throw std::runtime_error("failed to close raw binary file");
        }
        my_file.handle = nullptr;
    }
 
private:
    SelfClosingFILE my_file;
};
 
}
 
#endif