utils: convert to C++

src/ConfigPath.cxx

@@ -0,0 +1,120 @@
+/*
+ * 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 "ConfigPath.hxx"
+#include "conf.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#ifndef WIN32
+#include <pwd.h>
+#endif
+
+#if HAVE_IPV6 && WIN32
+#include <winsock2.h>
+#endif 
+
+#if HAVE_IPV6 && ! WIN32
+#include <sys/socket.h>
+#endif
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+G_GNUC_CONST
+static inline GQuark
+parse_path_quark(void)
+{
+	return g_quark_from_static_string("path");
+}
+
+char *
+parsePath(const char *path, G_GNUC_UNUSED GError **error_r)
+{
+	assert(path != nullptr);
+	assert(error_r == nullptr || *error_r == nullptr);
+
+#ifndef WIN32
+	if (!g_path_is_absolute(path) && path[0] != '~') {
+		g_set_error(error_r, parse_path_quark(), 0,
+			    "not an absolute path: %s", path);
+		return nullptr;
+	} else if (path[0] == '~') {
+		const char *home;
+
+		if (path[1] == '/' || path[1] == '\0') {
+			const char *user = config_get_string(CONF_USER, nullptr);
+			if (user != nullptr) {
+				struct passwd *passwd = getpwnam(user);
+				if (!passwd) {
+					g_set_error(error_r, parse_path_quark(), 0,
+						    "no such user: %s", user);
+					return nullptr;
+				}
+
+				home = passwd->pw_dir;
+			} else {
+				home = g_get_home_dir();
+				if (home == nullptr) {
+					g_set_error_literal(error_r, parse_path_quark(), 0,
+							    "problems getting home "
+							    "for current user");
+					return nullptr;
+				}
+			}
+
+			++path;
+		} else {
+			++path;
+
+			const char *slash = strchr(path, '/');
+			char *user = slash != nullptr
+				? g_strndup(path, slash - path)
+				: g_strdup(path);
+
+			struct passwd *passwd = getpwnam(user);
+			if (!passwd) {
+				g_set_error(error_r, parse_path_quark(), 0,
+					    "no such user: %s", user);
+				g_free(user);
+				return nullptr;
+			}
+
+			g_free(user);
+
+			home = passwd->pw_dir;
+			path = slash;
+		}
+
+		return g_strconcat(home, path, nullptr);
+	} else {
+#endif
+		return g_strdup(path);
+#ifndef WIN32
+	}
+#endif
+}