Implement simpleperf list subcommand.

simpleperf is used to replace linux/tools/perf. And This CL implements
the list subcommand of it.

Change-Id: I3e6fe854e19cc370070d0fd8416d0aa6fa8f8e90

1 files changed, 50 insertions, 0 deletions

diff --git a/simpleperf/command.cpp b/simpleperf/command.cpp
new file mode 100644
index 00000000..d26576a3
--- /dev/null
+++ b/simpleperf/command.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "command.h"
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+static std::vector<Command*>& Commands() {
+  // commands is used in the constructor of Command. Defining it as a static
+  // variable in a function makes sure it is initialized before use.
+  static std::vector<Command*> commands;
+  return commands;
+}
+
+Command* Command::FindCommandByName(const std::string& cmd_name) {
+  for (auto command : Commands()) {
+    if (command->Name() == cmd_name) {
+      return command;
+    }
+  }
+  return nullptr;
+}
+
+static bool CompareCommandByName(Command* cmd1, Command* cmd2) {
+  return cmd1->Name() < cmd2->Name();
+}
+
+const std::vector<Command*>& Command::GetAllCommands() {
+  std::sort(Commands().begin(), Commands().end(), CompareCommandByName);
+  return Commands();
+}
+
+void Command::RegisterCommand(Command* cmd) {
+  Commands().push_back(cmd);
+}