95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
/*************************************************************************/
|
|
/* file_access_buffered.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* http://www.godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
#ifndef FILE_ACCESS_BUFFERED_H
|
|
#define FILE_ACCESS_BUFFERED_H
|
|
|
|
#include "os/file_access.h"
|
|
|
|
#include "dvector.h"
|
|
#include "ustring.h"
|
|
|
|
class FileAccessBuffered : public FileAccess {
|
|
|
|
public:
|
|
enum {
|
|
DEFAULT_CACHE_SIZE = 128 * 1024,
|
|
};
|
|
|
|
private:
|
|
int cache_size;
|
|
|
|
int cache_data_left() const;
|
|
mutable Error last_error;
|
|
|
|
protected:
|
|
Error set_error(Error p_error) const;
|
|
|
|
mutable struct File {
|
|
|
|
bool open;
|
|
int size;
|
|
int offset;
|
|
String name;
|
|
int access_flags;
|
|
} file;
|
|
|
|
mutable struct Cache {
|
|
|
|
Vector<uint8_t> buffer;
|
|
int offset;
|
|
} cache;
|
|
|
|
virtual int read_data_block(int p_offset, int p_size, uint8_t *p_dest = 0) const = 0;
|
|
|
|
void set_cache_size(int p_size);
|
|
int get_cache_size();
|
|
|
|
public:
|
|
virtual size_t get_pos() const; ///< get position in the file
|
|
virtual size_t get_len() const; ///< get size of the file
|
|
|
|
virtual void seek(size_t p_position); ///< seek to a given position
|
|
virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file
|
|
|
|
virtual bool eof_reached() const;
|
|
|
|
virtual uint8_t get_8() const;
|
|
virtual int get_buffer(uint8_t *p_dst, int p_length) const; ///< get an array of bytes
|
|
|
|
virtual bool is_open() const;
|
|
|
|
virtual Error get_error() const;
|
|
|
|
FileAccessBuffered();
|
|
virtual ~FileAccessBuffered();
|
|
};
|
|
|
|
#endif
|