1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/**************************************************************************/
/* file_access_compressed.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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_COMPRESSED_H
#define FILE_ACCESS_COMPRESSED_H
#include "core/io/compression.h"
#include "core/io/file_access.h"
class FileAccessCompressed : public FileAccess {
Compression::Mode cmode = Compression::MODE_ZSTD;
bool writing = false;
uint64_t write_pos = 0;
uint8_t *write_ptr = nullptr;
uint32_t write_buffer_size = 0;
uint64_t write_max = 0;
uint32_t block_size = 0;
mutable bool read_eof = false;
mutable bool at_end = false;
struct ReadBlock {
uint32_t csize;
uint64_t offset;
};
mutable Vector<uint8_t> comp_buffer;
uint8_t *read_ptr = nullptr;
mutable uint32_t read_block = 0;
uint32_t read_block_count = 0;
mutable uint32_t read_block_size = 0;
mutable uint64_t read_pos = 0;
Vector<ReadBlock> read_blocks;
uint64_t read_total = 0;
String magic = "GCMP";
mutable Vector<uint8_t> buffer;
Ref<FileAccess> f;
void _close();
public:
void configure(const String &p_magic, Compression::Mode p_mode = Compression::MODE_ZSTD, uint32_t p_block_size = 4096);
Error open_after_magic(Ref<FileAccess> p_base);
virtual Error open_internal(const String &p_path, int p_mode_flags) override; ///< open a file
virtual bool is_open() const override; ///< true when file is open
virtual String get_path() const override; /// returns the path for the current open file
virtual String get_path_absolute() const override; /// returns the absolute path for the current open file
virtual void seek(uint64_t p_position) override; ///< seek to a given position
virtual void seek_end(int64_t p_position = 0) override; ///< seek from the end of file
virtual uint64_t get_position() const override; ///< get position in the file
virtual uint64_t get_length() const override; ///< get size of the file
virtual bool eof_reached() const override; ///< reading passed EOF
virtual uint8_t get_8() const override; ///< get a byte
virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const override;
virtual Error get_error() const override; ///< get last error
virtual void flush() override;
virtual void store_8(uint8_t p_dest) override; ///< store a byte
virtual bool file_exists(const String &p_name) override; ///< return true if a file exists
virtual uint64_t _get_modified_time(const String &p_file) override;
virtual uint32_t _get_unix_permissions(const String &p_file) override;
virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) override;
virtual void close() override;
FileAccessCompressed() {}
virtual ~FileAccessCompressed();
};
#endif // FILE_ACCESS_COMPRESSED_H
|