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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
* Copyright (C) 2003-2015 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_TRAITS_HXX
#define MPD_FS_TRAITS_HXX
#include "check.h"
#include "Compiler.h"
#include "util/StringPointer.hxx"
#include "util/StringAPI.hxx"
#ifdef WIN32
#include "util/CharUtil.hxx"
#include <tchar.h>
#endif
#include <string>
#include <assert.h>
#ifdef WIN32
#define PATH_LITERAL(s) _T(s)
#else
#define PATH_LITERAL(s) (s)
#endif
/**
* This class describes the nature of a native filesystem path.
*/
struct PathTraitsFS {
#ifdef WIN32
typedef std::wstring string;
#else
typedef std::string string;
#endif
typedef string::traits_type char_traits;
typedef char_traits::char_type value_type;
typedef StringPointer<value_type> Pointer;
typedef Pointer::pointer pointer;
typedef Pointer::const_pointer const_pointer;
#ifdef WIN32
static constexpr value_type SEPARATOR = '\\';
#else
static constexpr value_type SEPARATOR = '/';
#endif
static constexpr const_pointer CURRENT_DIRECTORY = PATH_LITERAL(".");
static constexpr bool IsSeparator(value_type ch) {
return
#ifdef WIN32
ch == '/' ||
#endif
ch == SEPARATOR;
}
gcc_pure gcc_nonnull_all
static const_pointer FindLastSeparator(const_pointer p) {
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(p != nullptr);
#endif
#ifdef WIN32
const_pointer pos = p + GetLength(p);
while (p != pos && !IsSeparator(*pos))
--pos;
return IsSeparator(*pos) ? pos : nullptr;
#else
return StringFindLast(p, SEPARATOR);
#endif
}
#ifdef WIN32
gcc_pure gcc_nonnull_all
static constexpr bool IsDrive(const_pointer p) {
return IsAlphaASCII(p[0]) && p[1] == ':';
}
#endif
gcc_pure gcc_nonnull_all
static bool IsAbsolute(const_pointer p) {
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(p != nullptr);
#endif
#ifdef WIN32
if (IsDrive(p) && IsSeparator(p[2]))
return true;
#endif
return IsSeparator(*p);
}
gcc_pure gcc_nonnull_all
static size_t GetLength(const_pointer p) {
return StringLength(p);
}
gcc_pure gcc_nonnull_all
static const_pointer Find(const_pointer p, value_type ch) {
return StringFind(p, ch);
}
/**
* Determine the "base" file name of the given native path.
* The return value points inside the given string.
*/
gcc_pure gcc_nonnull_all
static const_pointer GetBase(const_pointer p);
/**
* Determine the "parent" file name of the given native path.
* As a special case, returns the string "." if there is no
* separator in the given input string.
*/
gcc_pure gcc_nonnull_all
static string GetParent(const_pointer p);
/**
* 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 gcc_nonnull_all
static const_pointer Relative(const_pointer base, const_pointer other);
/**
* Constructs the path from the given components.
* If either of the components is empty string,
* remaining component is returned unchanged.
* If both components are empty strings, empty string is returned.
*/
gcc_pure gcc_nonnull_all
static string Build(const_pointer a, size_t a_size,
const_pointer b, size_t b_size);
gcc_pure gcc_nonnull_all
static string Build(const_pointer a, const_pointer b) {
return Build(a, GetLength(a), b, GetLength(b));
}
};
/**
* This class describes the nature of a MPD internal filesystem path.
*/
struct PathTraitsUTF8 {
typedef std::string string;
typedef string::traits_type char_traits;
typedef char_traits::char_type value_type;
typedef value_type *pointer;
typedef const value_type *const_pointer;
static constexpr value_type SEPARATOR = '/';
static constexpr const_pointer CURRENT_DIRECTORY = ".";
static constexpr bool IsSeparator(value_type ch) {
return ch == SEPARATOR;
}
gcc_pure gcc_nonnull_all
static const_pointer FindLastSeparator(const_pointer p) {
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(p != nullptr);
#endif
return strrchr(p, SEPARATOR);
}
#ifdef WIN32
gcc_pure gcc_nonnull_all
static constexpr bool IsDrive(const_pointer p) {
return IsAlphaASCII(p[0]) && p[1] == ':';
}
#endif
gcc_pure gcc_nonnull_all
static bool IsAbsolute(const_pointer p) {
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(p != nullptr);
#endif
#ifdef WIN32
if (IsDrive(p) && IsSeparator(p[2]))
return true;
#endif
return IsSeparator(*p);
}
gcc_pure gcc_nonnull_all
static size_t GetLength(const_pointer p) {
return StringLength(p);
}
gcc_pure gcc_nonnull_all
static const_pointer Find(const_pointer p, value_type ch) {
return StringFind(p, ch);
}
/**
* Determine the "base" file name of the given UTF-8 path.
* The return value points inside the given string.
*/
gcc_pure gcc_nonnull_all
static const_pointer GetBase(const_pointer p);
/**
* Determine the "parent" file name of the given UTF-8 path.
* As a special case, returns the string "." if there is no
* separator in the given input string.
*/
gcc_pure gcc_nonnull_all
static string GetParent(const_pointer p);
/**
* 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 gcc_nonnull_all
static const_pointer Relative(const_pointer base, const_pointer other);
/**
* Constructs the path from the given components.
* If either of the components is empty string,
* remaining component is returned unchanged.
* If both components are empty strings, empty string is returned.
*/
gcc_pure gcc_nonnull_all
static string Build(const_pointer a, size_t a_size,
const_pointer b, size_t b_size);
gcc_pure gcc_nonnull_all
static string Build(const_pointer a, const_pointer b) {
return Build(a, GetLength(a), b, GetLength(b));
}
};
#endif
|
