liblog: convert to C++

Bug: 119867234
Test: liblog, logcat, logd unit tests

Change-Id: I2a33b6fc37f9860c0041e3573bfb59ea389f623c
diff --git a/liblog/logger_name.cpp b/liblog/logger_name.cpp
new file mode 100644
index 0000000..c6f3cb7
--- /dev/null
+++ b/liblog/logger_name.cpp
@@ -0,0 +1,69 @@
+/*
+** Copyright 2013-2014, 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 <string.h>
+#include <type_traits>
+
+#include <log/log.h>
+
+#include "log_portability.h"
+
+/* In the future, we would like to make this list extensible */
+static const char* LOG_NAME[LOG_ID_MAX] = {
+    /* clang-format off */
+  [LOG_ID_MAIN] = "main",
+  [LOG_ID_RADIO] = "radio",
+  [LOG_ID_EVENTS] = "events",
+  [LOG_ID_SYSTEM] = "system",
+  [LOG_ID_CRASH] = "crash",
+  [LOG_ID_STATS] = "stats",
+  [LOG_ID_SECURITY] = "security",
+  [LOG_ID_KERNEL] = "kernel",
+    /* clang-format on */
+};
+
+LIBLOG_ABI_PUBLIC const char* android_log_id_to_name(log_id_t log_id) {
+  if (log_id >= LOG_ID_MAX) {
+    log_id = LOG_ID_MAIN;
+  }
+  return LOG_NAME[log_id];
+}
+
+static_assert(std::is_same<std::underlying_type<log_id_t>::type, uint32_t>::value,
+              "log_id_t must be an unsigned int");
+
+LIBLOG_ABI_PUBLIC log_id_t android_name_to_log_id(const char* logName) {
+  const char* b;
+  unsigned int ret;
+
+  if (!logName) {
+    return static_cast<log_id_t>(0xFFFFFFFF);
+  }
+  b = strrchr(logName, '/');
+  if (!b) {
+    b = logName;
+  } else {
+    ++b;
+  }
+
+  for (ret = LOG_ID_MIN; ret < LOG_ID_MAX; ++ret) {
+    const char* l = LOG_NAME[ret];
+    if (l && !strcmp(b, l)) {
+      return static_cast<log_id_t>(ret);
+    }
+  }
+  return static_cast<log_id_t>(0xFFFFFFFF); /* should never happen */
+}