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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_FS_ALLOCATED_PATH_HXX
#define MPD_FS_ALLOCATED_PATH_HXX
#include "check.h"
#include "Compiler.h"
#include "Traits.hxx"
#include "Path.hxx"
#include <utility>
#include <string>
class Error;
/**
* A path name in the native file system character set.
*
* This class manages the memory chunk where this path string is
* stored.
*/
class AllocatedPath {
typedef PathTraitsFS::string string;
typedef PathTraitsFS::value_type value_type;
typedef PathTraitsFS::pointer pointer;
typedef PathTraitsFS::const_pointer const_pointer;
string value;
struct Donate {};
/**
* Donate the allocated pointer to a new #AllocatedPath object.
*/
AllocatedPath(Donate, pointer _value);
AllocatedPath(const_pointer _value):value(_value) {}
AllocatedPath(string &&_value):value(std::move(_value)) {}
static AllocatedPath Build(const_pointer a, size_t a_size,
const_pointer b, size_t b_size) {
return AllocatedPath(PathTraitsFS::Build(a, a_size, b, b_size));
}
public:
/**
* Copy a #AllocatedPath object.
*/
AllocatedPath(const AllocatedPath &) = default;
/**
* Move a #AllocatedPath object.
*/
AllocatedPath(AllocatedPath &&other):value(std::move(other.value)) {}
~AllocatedPath();
/**
* Return a "nulled" instance. Its IsNull() method will
* return true. Such an object must not be used.
*
* @see IsNull()
*/
gcc_const
static AllocatedPath Null() {
return AllocatedPath("");
}
gcc_pure
operator Path() const {
return Path::FromFS(c_str());
}
/**
* Join two path components with the path separator.
*/
gcc_pure gcc_nonnull_all
static AllocatedPath Build(const_pointer a, const_pointer b) {
return Build(a, PathTraitsFS::GetLength(a),
b, PathTraitsFS::GetLength(b));
}
gcc_pure gcc_nonnull_all
static AllocatedPath Build(const_pointer a, const AllocatedPath &b) {
return Build(a, PathTraitsFS::GetLength(a),
b.value.c_str(), b.value.size());
}
gcc_pure gcc_nonnull_all
static AllocatedPath Build(const AllocatedPath &a, const_pointer b) {
return Build(a.value.c_str(), a.value.size(),
b, PathTraitsFS::GetLength(b));
}
gcc_pure
static AllocatedPath Build(const AllocatedPath &a,
const AllocatedPath &b) {
return Build(a.value.c_str(), a.value.size(),
b.value.c_str(), b.value.size());
}
/**
* Convert a C string that is already in the filesystem
* character set to a #Path instance.
*/
gcc_pure
static AllocatedPath FromFS(const_pointer fs) {
return AllocatedPath(fs);
}
/**
* Convert a C++ string that is already in the filesystem
* character set to a #Path instance.
*/
gcc_pure
static AllocatedPath FromFS(string &&fs) {
return AllocatedPath(std::move(fs));
}
/**
* Convert a UTF-8 C string to a #AllocatedPath instance.
* Returns return a "nulled" instance on error.
*/
gcc_pure gcc_nonnull_all
static AllocatedPath FromUTF8(const char *path_utf8);
gcc_pure gcc_nonnull_all
static AllocatedPath FromUTF8(const char *path_utf8, Error &error);
/**
* Copy a #AllocatedPath object.
*/
AllocatedPath &operator=(const AllocatedPath &) = default;
/**
* Move a #AllocatedPath object.
*/
AllocatedPath &operator=(AllocatedPath &&other) {
value = std::move(other.value);
return *this;
}
/**
* Check if this is a "nulled" instance. A "nulled" instance
* must not be used.
*/
bool IsNull() const {
return value.empty();
}
/**
* Clear this object's value, make it "nulled".
*
* @see IsNull()
*/
void SetNull() {
value.clear();
}
/**
* @return the length of this string in number of "value_type"
* elements (which may not be the number of characters).
*/
gcc_pure
size_t length() const {
return value.length();
}
/**
* Returns the value as a const C string. The returned
* pointer is invalidated whenever the value of life of this
* instance ends.
*/
gcc_pure
const_pointer c_str() const {
return value.c_str();
}
/**
* Returns a pointer to the raw value, not necessarily
* null-terminated.
*/
gcc_pure
const_pointer data() const {
return value.data();
}
/**
* Convert the path to UTF-8.
* Returns empty string on error or if this instance is "nulled"
* (#IsNull returns true).
*/
gcc_pure
std::string ToUTF8() const;
/**
* Gets directory name of this path.
* Returns a "nulled" instance on error.
*/
gcc_pure
AllocatedPath GetDirectoryName() const;
/**
* Determine the relative part of the given path to this
* object, not including the directory separator. Returns an
* empty string if the given path equals this object or
* nullptr on mismatch.
*/
gcc_pure
const char *RelativeFS(const char *other_fs) const;
/**
* Chop trailing directory separators.
*/
void ChopSeparators();
gcc_pure
bool IsAbsolute() {
return PathTraitsFS::IsAbsolute(c_str());
}
};
#endif
|
