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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*************************************************************************/
/* file_access.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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_H
#define FILE_ACCESS_H
#include "core/math/math_defs.h"
#include "core/os/memory.h"
#include "core/string/ustring.h"
#include "core/typedefs.h"
/**
* Multi-Platform abstraction for accessing to files.
*/
class FileAccess {
public:
enum AccessType {
ACCESS_RESOURCES,
ACCESS_USERDATA,
ACCESS_FILESYSTEM,
ACCESS_MAX
};
typedef void (*FileCloseFailNotify)(const String &);
typedef FileAccess *(*CreateFunc)();
bool endian_swap = false;
bool real_is_double = false;
virtual uint32_t _get_unix_permissions(const String &p_file) = 0;
virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) = 0;
protected:
String fix_path(const String &p_path) const;
virtual Error _open(const String &p_path, int p_mode_flags) = 0; ///< open a file
virtual uint64_t _get_modified_time(const String &p_file) = 0;
static FileCloseFailNotify close_fail_notify;
private:
static bool backup_save;
AccessType _access_type = ACCESS_FILESYSTEM;
static CreateFunc create_func[ACCESS_MAX]; /** default file access creation function for a platform */
template <class T>
static FileAccess *_create_builtin() {
return memnew(T);
}
public:
static void set_file_close_fail_notify_callback(FileCloseFailNotify p_cbk) { close_fail_notify = p_cbk; }
virtual void _set_access_type(AccessType p_access);
enum ModeFlags {
READ = 1,
WRITE = 2,
READ_WRITE = 3,
WRITE_READ = 7,
};
virtual void close() = 0; ///< close a file
virtual bool is_open() const = 0; ///< true when file is open
virtual String get_path() const { return ""; } /// returns the path for the current open file
virtual String get_path_absolute() const { return ""; } /// returns the absolute path for the current open file
virtual void seek(size_t p_position) = 0; ///< seek to a given position
virtual void seek_end(int64_t p_position = 0) = 0; ///< seek from the end of file
virtual size_t get_position() const = 0; ///< get position in the file
virtual size_t get_len() const = 0; ///< get size of the file
virtual bool eof_reached() const = 0; ///< reading passed EOF
virtual uint8_t get_8() const = 0; ///< get a byte
virtual uint16_t get_16() const; ///< get 16 bits uint
virtual uint32_t get_32() const; ///< get 32 bits uint
virtual uint64_t get_64() const; ///< get 64 bits uint
virtual float get_float() const;
virtual double get_double() const;
virtual real_t get_real() const;
virtual int get_buffer(uint8_t *p_dst, int p_length) const; ///< get an array of bytes
virtual String get_line() const;
virtual String get_token() const;
virtual Vector<String> get_csv_line(const String &p_delim = ",") const;
virtual String get_as_utf8_string() const;
/**< use this for files WRITTEN in _big_ endian machines (ie, amiga/mac)
* It's not about the current CPU type but file formats.
* this flags get reset to false (little endian) on each open
*/
virtual void set_endian_swap(bool p_swap) { endian_swap = p_swap; }
inline bool get_endian_swap() const { return endian_swap; }
virtual Error get_error() const = 0; ///< get last error
virtual void flush() = 0;
virtual void store_8(uint8_t p_dest) = 0; ///< store a byte
virtual void store_16(uint16_t p_dest); ///< store 16 bits uint
virtual void store_32(uint32_t p_dest); ///< store 32 bits uint
virtual void store_64(uint64_t p_dest); ///< store 64 bits uint
virtual void store_float(float p_dest);
virtual void store_double(double p_dest);
virtual void store_real(real_t p_real);
virtual void store_string(const String &p_string);
virtual void store_line(const String &p_line);
virtual void store_csv_line(const Vector<String> &p_values, const String &p_delim = ",");
virtual void store_pascal_string(const String &p_string);
virtual String get_pascal_string();
virtual void store_buffer(const uint8_t *p_src, int p_length); ///< store an array of bytes
virtual bool file_exists(const String &p_name) = 0; ///< return true if a file exists
virtual Error reopen(const String &p_path, int p_mode_flags); ///< does not change the AccessType
static FileAccess *create(AccessType p_access); /// Create a file access (for the current platform) this is the only portable way of accessing files.
static FileAccess *create_for_path(const String &p_path);
static FileAccess *open(const String &p_path, int p_mode_flags, Error *r_error = nullptr); /// Create a file access (for the current platform) this is the only portable way of accessing files.
static CreateFunc get_create_func(AccessType p_access);
static bool exists(const String &p_name); ///< return true if a file exists
static uint64_t get_modified_time(const String &p_file);
static uint32_t get_unix_permissions(const String &p_file);
static Error set_unix_permissions(const String &p_file, uint32_t p_permissions);
static void set_backup_save(bool p_enable) { backup_save = p_enable; };
static bool is_backup_save_enabled() { return backup_save; };
static String get_md5(const String &p_file);
static String get_sha256(const String &p_file);
static String get_multiple_md5(const Vector<String> &p_file);
static Vector<uint8_t> get_file_as_array(const String &p_path, Error *r_error = nullptr);
static String get_file_as_string(const String &p_path, Error *r_error = nullptr);
template <class T>
static void make_default(AccessType p_access) {
create_func[p_access] = _create_builtin<T>;
}
FileAccess() {}
virtual ~FileAccess() {}
};
struct FileAccessRef {
_FORCE_INLINE_ FileAccess *operator->() {
return f;
}
operator bool() const { return f != nullptr; }
FileAccess *f;
operator FileAccess *() { return f; }
FileAccessRef(FileAccess *fa) { f = fa; }
~FileAccessRef() {
if (f) {
memdelete(f);
}
}
};
#endif // FILE_ACCESS_H
|