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
|
/*
* 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.
*/
#include "config.h"
#include "fs/Path.hxx"
#include "ConfigGlobal.hxx"
#include "system/FatalError.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
#include "gcc.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
#ifdef G_OS_WIN32
#include <windows.h> // for GetACP()
#include <stdio.h> // for sprintf()
#endif
/**
* Maximal number of bytes required to represent path name in UTF-8
* (including nul-terminator).
* This value is a rought estimate of upper bound.
* It's based on path name limit in bytes (MPD_PATH_MAX)
* and assumption that some weird encoding could represent some UTF-8 4 byte
* sequences with single byte.
*/
#define MPD_PATH_MAX_UTF8 ((MPD_PATH_MAX - 1) * 4 + 1)
const Domain path_domain("path");
std::string fs_charset;
inline Path::Path(Donate, pointer _value)
:value(_value) {
g_free(_value);
}
/* no inlining, please */
Path::~Path() {}
Path
Path::Build(const_pointer a, const_pointer b)
{
return Path(Donate(), g_build_filename(a, b, nullptr));
}
std::string Path::ToUTF8(const_pointer path_fs)
{
if (path_fs == nullptr)
return std::string();
GIConv conv = g_iconv_open("utf-8", fs_charset.c_str());
if (conv == reinterpret_cast<GIConv>(-1))
return std::string();
// g_iconv() does not need nul-terminator,
// std::string could be created without it too.
char path_utf8[MPD_PATH_MAX_UTF8 - 1];
char *in = const_cast<char *>(path_fs);
char *out = path_utf8;
size_t in_left = strlen(path_fs);
size_t out_left = sizeof(path_utf8);
size_t ret = g_iconv(conv, &in, &in_left, &out, &out_left);
g_iconv_close(conv);
if (ret == static_cast<size_t>(-1) || in_left > 0)
return std::string();
return std::string(path_utf8, sizeof(path_utf8) - out_left);
}
Path Path::FromUTF8(const char *path_utf8)
{
gchar *p;
p = g_convert(path_utf8, -1,
fs_charset.c_str(), "utf-8",
NULL, NULL, NULL);
return Path(Donate(), p);
}
Path
Path::FromUTF8(const char *path_utf8, Error &error)
{
Path path = FromUTF8(path_utf8);
if (path.IsNull())
error.Format(path_domain,
"Failed to convert to file system charset: %s",
path_utf8);
return path;
}
Path
Path::GetDirectoryName() const
{
return Path(Donate(), g_path_get_dirname(value.c_str()));
}
gcc_pure
static bool
IsSupportedCharset(const char *charset)
{
/* convert a space to check if the charset is valid */
char *test = g_convert(" ", 1, charset, "UTF-8", NULL, NULL, NULL);
if (test == NULL)
return false;
g_free(test);
return true;
}
static void
SetFSCharset(const char *charset)
{
assert(charset != NULL);
if (!IsSupportedCharset(charset))
FormatFatalError("invalid filesystem charset: %s", charset);
fs_charset = charset;
FormatDebug(path_domain,
"SetFSCharset: fs charset is: %s", fs_charset.c_str());
}
const std::string &Path::GetFSCharset()
{
return fs_charset;
}
void Path::GlobalInit()
{
const char *charset = NULL;
charset = config_get_string(CONF_FS_CHARSET, NULL);
if (charset == NULL) {
#ifndef G_OS_WIN32
const gchar **encodings;
g_get_filename_charsets(&encodings);
if (encodings[0] != NULL && *encodings[0] != '\0')
charset = encodings[0];
#else /* G_OS_WIN32 */
/* Glib claims that file system encoding is always utf-8
* on native Win32 (i.e. not Cygwin).
* However this is true only if <gstdio.h> helpers are used.
* MPD uses regular <stdio.h> functions.
* Those functions use encoding determined by GetACP(). */
static char win_charset[13];
sprintf(win_charset, "cp%u", GetACP());
charset = win_charset;
#endif
}
if (charset) {
SetFSCharset(charset);
} else {
LogDebug(path_domain,
"setting filesystem charset to ISO-8859-1");
SetFSCharset("ISO-8859-1");
}
}
const char *
Path::RelativeFS(const char *other_fs) const
{
const size_t l = length();
if (memcmp(data(), other_fs, l) != 0)
return nullptr;
other_fs += l;
if (*other_fs != 0) {
if (!IsSeparatorFS(*other_fs))
/* mismatch */
return nullptr;
/* skip remaining path separators */
do {
++other_fs;
} while (IsSeparatorFS(*other_fs));
}
return other_fs;
}
void
Path::ChopSeparators()
{
size_t l = length();
const char *p = data();
while (l >= 2 && IsSeparatorFS(p[l - 1])) {
--l;
#if GCC_CHECK_VERSION(4,7) && !defined(__clang__)
value.pop_back();
#else
value.erase(value.end() - 1, value.end());
#endif
}
}
|
