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
|
/*
* Copyright (C) 2003-2013 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"
#ifdef WIN32
#include "util/CharUtil.hxx"
#endif
#include <string>
#include <string.h>
#include <assert.h>
/**
* This class describes the nature of a filesystem path.
*/
struct PathTraits {
typedef std::string string;
typedef char value_type;
typedef char *pointer;
typedef const char *const_pointer;
#ifdef WIN32
static constexpr value_type SEPARATOR_FS = '\\';
#else
static constexpr value_type SEPARATOR_FS = '/';
#endif
static constexpr char SEPARATOR_UTF8 = '/';
static constexpr bool IsSeparatorFS(value_type ch) {
return
#ifdef WIN32
ch == '/' ||
#endif
ch == SEPARATOR_FS;
}
static constexpr bool IsSeparatorUTF8(char ch) {
return ch == SEPARATOR_UTF8;
}
gcc_pure
static bool IsAbsoluteFS(const_pointer p) {
assert(p != nullptr);
#ifdef WIN32
if (IsAlphaASCII(p[0]) && p[1] == ':' && IsSeparatorFS(p[2]))
return true;
#endif
return IsSeparatorFS(*p);
}
gcc_pure
static bool IsAbsoluteUTF8(const char *p) {
assert(p != nullptr);
#ifdef WIN32
if (IsAlphaASCII(p[0]) && p[1] == ':' && IsSeparatorUTF8(p[2]))
return true;
#endif
return IsSeparatorUTF8(*p);
}
gcc_pure
static size_t GetLengthFS(const_pointer p) {
return strlen(p);
}
/**
* 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 BuildFS(const_pointer a, size_t a_size,
const_pointer b, size_t b_size);
/**
* 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 char *GetBaseUTF8(const char *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 std::string GetParentUTF8(const char *p);
};
#endif
|
