1b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard/* 2b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * Copyright (C) 2013, The Android Open Source Project 3b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * 4b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * Licensed under the Apache License, Version 2.0 (the "License"); 5b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * you may not use this file except in compliance with the License. 6b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * You may obtain a copy of the License at 7b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * 8b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * http://www.apache.org/licenses/LICENSE-2.0 9b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * 10b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * Unless required by applicable law or agreed to in writing, software 11b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * distributed under the License is distributed on an "AS IS" BASIS, 12b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * See the License for the specific language governing permissions and 14b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard * limitations under the License. 15b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard */ 16b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 17b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard#include "log_utils.h" 18b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 19b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard#include <cstdio> 20b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard#include <stdarg.h> 21b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 22b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard#include "defines.h" 23b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 24b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalardnamespace latinime { 25b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard /* static */ void LogUtils::logToJava(JNIEnv *const env, const char *const format, ...) { 26b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard static const char *TAG = "LatinIME:LogUtils"; 27b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard const jclass androidUtilLogClass = env->FindClass("android/util/Log"); 28b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (!androidUtilLogClass) { 29b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // If we can't find the class, we are probably in off-device testing, and 30b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // it's expected. Regardless, logging is not essential to functionality, so 31b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // we should just return. However, FindClass has thrown an exception behind 32b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // our back and there is no way to prevent it from doing that, so we clear 33b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // the exception before we return. 34b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard env->ExceptionClear(); 35b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard return; 36b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard } 37b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard const jmethodID logDotIMethodId = env->GetStaticMethodID(androidUtilLogClass, "i", 38b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard "(Ljava/lang/String;Ljava/lang/String;)I"); 39b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (!logDotIMethodId) { 40b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard env->ExceptionClear(); 41b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (androidUtilLogClass) env->DeleteLocalRef(androidUtilLogClass); 42b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard return; 43b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard } 44b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard const jstring javaTag = env->NewStringUTF(TAG); 45b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 46b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard static const int DEFAULT_LINE_SIZE = 128; 47b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard char fixedSizeCString[DEFAULT_LINE_SIZE]; 48b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard va_list argList; 49b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard va_start(argList, format); 50b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // Get the necessary size. Add 1 for the 0 terminator. 51b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard const int size = vsnprintf(fixedSizeCString, DEFAULT_LINE_SIZE, format, argList) + 1; 52b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard va_end(argList); 53b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 54b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard jstring javaString; 55b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (size <= DEFAULT_LINE_SIZE) { 56b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // The buffer was large enough. 57b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard javaString = env->NewStringUTF(fixedSizeCString); 58b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard } else { 59b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard // The buffer was not large enough. 60b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard va_start(argList, format); 61b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard char variableSizeCString[size]; 62b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard vsnprintf(variableSizeCString, size, format, argList); 63b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard va_end(argList); 64b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard javaString = env->NewStringUTF(variableSizeCString); 65b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard } 66b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard 67b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard env->CallStaticIntMethod(androidUtilLogClass, logDotIMethodId, javaTag, javaString); 68b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (javaString) env->DeleteLocalRef(javaString); 69b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (javaTag) env->DeleteLocalRef(javaTag); 70b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard if (androidUtilLogClass) env->DeleteLocalRef(androidUtilLogClass); 71b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard } 72b6f5d3e39d1f3073c4e7d75e9d4309112879dc6eJean Chalard} 73