ladybird/Libraries/LibCore/CIODevice.h
Andreas Kling 0e75aba7c3 StringView: Rename characters() to characters_without_null_termination().
This should make you think twice before trying to use the const char* from
a StringView as if it's a null-terminated string.
2019-07-08 15:38:44 +02:00

75 lines
1.8 KiB
C++

#pragma once
#include <AK/ByteBuffer.h>
#include <AK/StringView.h>
#include <LibCore/CObject.h>
class CIODevice : public CObject {
public:
enum OpenMode {
NotOpen = 0,
ReadOnly = 1,
WriteOnly = 2,
ReadWrite = 3,
Append = 4,
Truncate = 8,
MustBeNew = 16,
};
virtual ~CIODevice() override;
int fd() const { return m_fd; }
unsigned mode() const { return m_mode; }
bool eof() const { return m_eof; }
int error() const { return m_error; }
const char* error_string() const;
bool has_error() const { return m_error != 0; }
ByteBuffer read(int max_size);
ByteBuffer read_line(int max_size);
ByteBuffer read_all();
bool write(const u8*, int size);
bool write(const StringView& v) { return write((const u8*)v.characters_without_null_termination(), v.length()); }
// FIXME: I would like this to be const but currently it needs to call populate_read_buffer().
bool can_read_line();
bool can_read() const;
enum class SeekMode {
SetPosition,
FromCurrentPosition,
FromEndPosition,
};
bool seek(i64, SeekMode = SeekMode::SetPosition, off_t* = nullptr);
virtual bool open(CIODevice::OpenMode) = 0;
virtual bool close();
int printf(const char*, ...);
virtual const char* class_name() const override { return "CIODevice"; }
protected:
explicit CIODevice(CObject* parent = nullptr);
void set_fd(int fd) { m_fd = fd; }
void set_mode(OpenMode mode) { m_mode = mode; }
void set_error(int error) { m_error = error; }
void set_eof(bool eof) { m_eof = eof; }
private:
bool populate_read_buffer();
bool can_read_from_fd() const;
int m_fd { -1 };
int m_error { 0 };
bool m_eof { false };
OpenMode m_mode { NotOpen };
Vector<u8> m_buffered_data;
};