1 files changed, 62 insertions, 0 deletions
diff --git a/native/jni/src/utils/log_utils.h b/native/jni/src/utils/log_utils.h
new file mode 100644
index 000000000..ccbecfc1d
--- /dev/null
+++ b/native/jni/src/utils/log_utils.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef LATINIME_LOG_UTILS_H
+#define LATINIME_LOG_UTILS_H
+
+#include <cstdio>
+#include <stdarg.h>
+
+#include "defines.h"
+#include "jni.h"
+
+namespace latinime {
+
+class LogUtils {
+ public:
+    static void logToJava(JNIEnv *const env, const char *const format, ...)
+#ifdef __GNUC__
+            __attribute__ ((format (printf, 2, 3)))
+#endif // __GNUC__
+            {
+        static const char *TAG = "LatinIME:LogUtils";
+        const jclass androidUtilLogClass = env->FindClass("android/util/Log");
+        const jmethodID logDotIMethodId = env->GetStaticMethodID(androidUtilLogClass, "i",
+                "(Ljava/lang/String;Ljava/lang/String;)I");
+        const jstring javaTag = env->NewStringUTF(TAG);
+
+        va_list argList;
+        va_start(argList, format);
+        // Get the necessary size. Add 1 for the 0 terminator.
+        const int size = vsnprintf(0, 0, format, argList) + 1;
+        va_end(argList);
+        char cString[size];
+        va_start(argList, format);
+        vsnprintf(cString, size, format, argList);
+        va_end(argList);
+
+        jstring javaString = env->NewStringUTF(cString);
+        env->CallStaticIntMethod(androidUtilLogClass, logDotIMethodId, javaTag, javaString);
+        env->DeleteLocalRef(javaString);
+        env->DeleteLocalRef(javaTag);
+        env->DeleteLocalRef(androidUtilLogClass);
+    }
+
+ private:
+    DISALLOW_COPY_AND_ASSIGN(LogUtils);
+};
+} // namespace latinime
+#endif // LATINIME_LOG_UTILS_H