file.hpp

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#ifndef LIBFILEZILLA_FILE_HEADER
#define LIBFILEZILLA_FILE_HEADER
 
#include "fsresult.hpp"
#include "libfilezilla.hpp"
 
#ifdef FZ_WINDOWS
#include "glue/windows.hpp"
#endif
 
#include <stdint.h>
 
namespace fz {
 
class datetime;
 
class FZ_PUBLIC_SYMBOL file final
{
public:
#ifdef FZ_WINDOWS
    typedef HANDLE file_t;
#else
    typedef int file_t;
#endif
 
    enum mode {
        reading,
        writing,
        readwrite
    };
 
    enum creation_flags {
        existing = 0x1,
 
        empty = 0x2,
 
        current_user_only = 0x4,
 
         current_user_and_admins_only = 0x8
    };
 
    file() = default;
    file(native_string const& f, mode m, creation_flags d = existing);
 
 
    explicit file(file_t fd);
 
    ~file();
 
    file(file const&) = delete;
    file& operator=(file const&) = delete;
 
    file(file && op) noexcept;
    file& operator=(file && op) noexcept;
 
    bool opened() const;
    explicit operator bool() const { return opened(); }
 
    result open(native_string const& f, mode m, creation_flags d = existing);
 
    void close();
 
    file_t fd() {
        return fd_;
    }
 
    file_t detach();
 
    enum seek_mode {
        begin,
 
        current,
 
        end
    };
 
    int64_t size() const;
 
    int64_t seek(int64_t offset, seek_mode m);
 
    int64_t position() { return seek(0, current); }
 
    bool truncate();
 
    int64_t read(void *buf, int64_t count);
 
    int64_t write(void const* buf, int64_t count);
 
    bool fsync();
 
    bool set_modification_time(datetime const& t);
 
private:
#ifdef FZ_WINDOWS
    HANDLE fd_{INVALID_HANDLE_VALUE};
#else
    int fd_{-1};
#endif
};
 
bool FZ_PUBLIC_SYMBOL remove_file(native_string const& name);
 
inline file::creation_flags operator|(file::creation_flags lhs, file::creation_flags rhs) {
    return static_cast<file::creation_flags>(static_cast<unsigned int>(lhs) | rhs);
}
inline file::creation_flags& operator|=(file::creation_flags & lhs, file::creation_flags rhs) {
    lhs = static_cast<file::creation_flags>(static_cast<unsigned int>(lhs) | rhs);
    return lhs;
}
 
}
#endif