151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "fs/Path.hxx"
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#include "conf.h"
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#include "mpd_error.h"
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#include "gcc.h"
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#include <glib.h>
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#include <assert.h>
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#include <string.h>
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#ifdef G_OS_WIN32
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#include <windows.h> // for GetACP()
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#include <stdio.h> // for sprintf()
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#endif
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "path"
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/**
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* Maximal number of bytes required to represent path name in UTF-8
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* (including nul-terminator).
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* This value is a rought estimate of upper bound.
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* It's based on path name limit in bytes (MPD_PATH_MAX)
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* and assumption that some weird encoding could represent some UTF-8 4 byte
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* sequences with single byte.
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*/
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#define MPD_PATH_MAX_UTF8 ((MPD_PATH_MAX - 1) * 4 + 1)
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std::string fs_charset;
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std::string Path::ToUTF8(const_pointer path_fs)
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{
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if (path_fs == nullptr)
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return std::string();
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GIConv conv = g_iconv_open("utf-8", fs_charset.c_str());
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if (conv == reinterpret_cast<GIConv>(-1))
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return std::string();
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// g_iconv() does not need nul-terminator,
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// std::string could be created without it too.
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char path_utf8[MPD_PATH_MAX_UTF8 - 1];
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char *in = const_cast<char *>(path_fs);
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char *out = path_utf8;
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size_t in_left = strlen(path_fs);
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size_t out_left = sizeof(path_utf8);
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size_t ret = g_iconv(conv, &in, &in_left, &out, &out_left);
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g_iconv_close(conv);
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if (ret == static_cast<size_t>(-1) || in_left > 0)
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return std::string();
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return std::string(path_utf8, sizeof(path_utf8) - out_left);
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}
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Path Path::FromUTF8(const char *path_utf8)
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{
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gchar *p;
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p = g_convert(path_utf8, -1,
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fs_charset.c_str(), "utf-8",
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NULL, NULL, NULL);
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return Path(Donate(), p);
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}
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gcc_pure
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static bool
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IsSupportedCharset(const char *charset)
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{
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/* convert a space to check if the charset is valid */
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char *test = g_convert(" ", 1, charset, "UTF-8", NULL, NULL, NULL);
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if (test == NULL)
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return false;
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g_free(test);
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return true;
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}
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static void
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SetFSCharset(const char *charset)
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{
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assert(charset != NULL);
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if (!IsSupportedCharset(charset))
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MPD_ERROR("invalid filesystem charset: %s", charset);
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fs_charset = charset;
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g_debug("SetFSCharset: fs charset is: %s", fs_charset.c_str());
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}
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const std::string &Path::GetFSCharset()
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{
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return fs_charset;
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}
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void Path::GlobalInit()
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{
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const char *charset = NULL;
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charset = config_get_string(CONF_FS_CHARSET, NULL);
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if (charset == NULL) {
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#ifndef G_OS_WIN32
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const gchar **encodings;
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g_get_filename_charsets(&encodings);
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if (encodings[0] != NULL && *encodings[0] != '\0')
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charset = encodings[0];
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#else /* G_OS_WIN32 */
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/* Glib claims that file system encoding is always utf-8
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* on native Win32 (i.e. not Cygwin).
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* However this is true only if <gstdio.h> helpers are used.
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* MPD uses regular <stdio.h> functions.
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* Those functions use encoding determined by GetACP(). */
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static char win_charset[13];
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sprintf(win_charset, "cp%u", GetACP());
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charset = win_charset;
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#endif
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}
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if (charset) {
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SetFSCharset(charset);
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} else {
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g_message("setting filesystem charset to ISO-8859-1");
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SetFSCharset("ISO-8859-1");
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}
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}
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