Client: move code to class CommandListBuilder

1 files changed, 100 insertions, 0 deletions

diff --git a/src/CommandListBuilder.hxx b/src/CommandListBuilder.hxx
new file mode 100644
index 000000000..dbcc15dc2
--- /dev/null
+++ b/src/CommandListBuilder.hxx
@@ -0,0 +1,100 @@
+/*
+ * 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_COMMAND_LIST_BUILDER_HXX
+#define MPD_COMMAND_LIST_BUILDER_HXX
+
+#include <glib.h>
+#include <assert.h>
+
+class CommandListBuilder {
+	/**
+	 * for when in list mode
+	 */
+	GSList *cmd_list;
+
+	/**
+	 * print OK after each command execution
+	 */
+	int cmd_list_OK;
+
+	/**
+	 * mem cmd_list consumes
+	 */
+	size_t cmd_list_size;
+
+public:
+	CommandListBuilder()
+		:cmd_list(nullptr), cmd_list_OK(-1), cmd_list_size(0) {}
+	~CommandListBuilder() {
+		Reset();
+	}
+
+	/**
+	 * Is a command list currently being built?
+	 */
+	bool IsActive() const {
+		assert(cmd_list_OK >= -1 && cmd_list_OK <= 1);
+
+		return cmd_list_OK >= 0;
+	}
+
+	/**
+	 * Is the object in "list_OK" mode?
+	 */
+	bool IsOKMode() const {
+		assert(IsActive());
+
+		return (bool)cmd_list_OK;
+	}
+
+	/**
+	 * Reset the object: delete the list and clear the mode.
+	 */
+	void Reset();
+
+	/**
+	 * Begin building a command list.
+	 */
+	void Begin(bool ok) {
+		assert(cmd_list == nullptr);
+		assert(cmd_list_OK == -1);
+
+		cmd_list_OK = (int)ok;
+	}
+
+	/**
+	 * @return false if the list is full
+	 */
+	bool Add(const char *cmd);
+
+	/**
+	 * Finishes the list and returns it.
+	 */
+	GSList *Commit() {
+		assert(IsActive());
+
+		/* for scalability reasons, we have prepended each new
+		   command; now we have to reverse it to restore the
+		   correct order */
+		return cmd_list = g_slist_reverse(cmd_list);
+	}
+};
+
+#endif