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
|
/*
* 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.
*/
#include "config.h"
#include "Charset.hxx"
#include "Domain.hxx"
#include "Limits.hxx"
#include "Log.hxx"
#include "Traits.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#ifdef HAVE_GLIB
#include <glib.h>
#endif
#include <algorithm>
#include <assert.h>
#include <string.h>
#ifdef HAVE_GLIB
static constexpr Domain convert_domain("convert");
/**
* 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.
*/
static constexpr size_t MPD_PATH_MAX_UTF8 = (MPD_PATH_MAX - 1) * 4 + 1;
static std::string fs_charset;
gcc_pure
static bool
CheckCharset(const char *charset, Error &error)
{
/* convert a space to check if the charset is valid */
GError *error2 = nullptr;
char *test = g_convert(" ", 1, charset, "UTF-8", nullptr, nullptr, &error2);
if (test == nullptr) {
error.Set(convert_domain, error2->code, error2->message);
g_error_free(error2);
return false;
}
g_free(test);
return true;
}
bool
SetFSCharset(const char *charset, Error &error)
{
assert(charset != nullptr);
if (!CheckCharset(charset, error)) {
error.FormatPrefix("Failed to initialize filesystem charset '%s': ",
charset);
return false;
}
fs_charset = charset;
FormatDebug(path_domain,
"SetFSCharset: fs charset is: %s", fs_charset.c_str());
return true;
}
#endif
const char *
GetFSCharset()
{
#ifdef HAVE_FS_CHARSET
return fs_charset.empty() ? "UTF-8" : fs_charset.c_str();
#else
return "UTF-8";
#endif
}
static inline void FixSeparators(std::string &s)
{
#ifdef WIN32
// For whatever reason GCC can't convert constexpr to value reference.
// This leads to link errors when passing separators directly.
auto from = PathTraitsFS::SEPARATOR;
auto to = PathTraitsUTF8::SEPARATOR;
std::replace(s.begin(), s.end(), from, to);
#else
(void)s;
#endif
}
std::string
PathToUTF8(const char *path_fs)
{
assert(path_fs != nullptr);
#ifdef HAVE_GLIB
if (fs_charset.empty()) {
#endif
auto result = std::string(path_fs);
FixSeparators(result);
return result;
#ifdef HAVE_GLIB
}
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();
auto result_path = std::string(path_utf8, sizeof(path_utf8) - out_left);
FixSeparators(result_path);
return result_path;
#endif
}
#ifdef HAVE_GLIB
char *
PathFromUTF8(const char *path_utf8)
{
assert(path_utf8 != nullptr);
if (fs_charset.empty())
return g_strdup(path_utf8);
return g_convert(path_utf8, -1,
fs_charset.c_str(), "utf-8",
nullptr, nullptr, nullptr);
}
#endif
|
