android_util_Log.cpp revision c1b9bbb21c8ad5109978a4e9e770cd18b0257434
1edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* //device/libs/android_runtime/android_util_Log.cpp 2edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** 3edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** Copyright 2006, The Android Open Source Project 4edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** 5edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License"); 6edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** you may not use this file except in compliance with the License. 7edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** You may obtain a copy of the License at 8edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** 9edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** http://www.apache.org/licenses/LICENSE-2.0 10edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** 11edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** Unless required by applicable law or agreed to in writing, software 12edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** distributed under the License is distributed on an "AS IS" BASIS, 13edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** See the License for the specific language governing permissions and 15edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project** limitations under the License. 16edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project*/ 17edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 18edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define LOG_NAMESPACE "log.tag." 19edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define LOG_TAG "Log_println" 20edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 21c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <assert.h> 22edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <cutils/properties.h> 23edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/Log.h> 24edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/String8.h> 25edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 26edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include "jni.h" 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include "JNIHelp.h" 28edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include "utils/misc.h" 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include "android_runtime/AndroidRuntime.h" 30edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 31edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define MIN(a,b) ((a<b)?a:b) 32edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 33edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstruct levels_t { 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project jint verbose; 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project jint debug; 38edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project jint info; 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project jint warn; 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project jint error; 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project jint assert; 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic levels_t levels; 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic int toLevel(const char* value) 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project switch (value[0]) { 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'V': return levels.verbose; 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'D': return levels.debug; 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'I': return levels.info; 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'W': return levels.warn; 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'E': return levels.error; 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'A': return levels.assert; 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project case 'S': return -1; // SUPPRESS 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return levels.info; 57} 58 59static jboolean android_util_Log_isLoggable(JNIEnv* env, jobject clazz, jstring tag, jint level) 60{ 61 int len; 62 char key[PROPERTY_KEY_MAX]; 63 char buf[PROPERTY_VALUE_MAX]; 64 65 if (tag == NULL) { 66 return false; 67 } 68 69 jboolean result = false; 70 71 const char* chars = env->GetStringUTFChars(tag, NULL); 72 73 if ((strlen(chars)+sizeof(LOG_NAMESPACE)) > PROPERTY_KEY_MAX) { 74 char buf2[200]; 75 snprintf(buf2, sizeof(buf2), "Log tag \"%s\" exceeds limit of %d characters\n", 76 chars, PROPERTY_KEY_MAX - sizeof(LOG_NAMESPACE)); 77 78 // release the chars! 79 env->ReleaseStringUTFChars(tag, chars); 80 81 jniThrowException(env, "java/lang/IllegalArgumentException", buf2); 82 return false; 83 } else { 84 strncpy(key, LOG_NAMESPACE, sizeof(LOG_NAMESPACE)-1); 85 strcpy(key + sizeof(LOG_NAMESPACE) - 1, chars); 86 } 87 88 env->ReleaseStringUTFChars(tag, chars); 89 90 len = property_get(key, buf, ""); 91 int logLevel = toLevel(buf); 92 return (logLevel >= 0 && level >= logLevel) ? true : false; 93} 94 95/* 96 * In class android.util.Log: 97 * public static native int println_native(int buffer, int priority, String tag, String msg) 98 */ 99static jint android_util_Log_println_native(JNIEnv* env, jobject clazz, 100 jint bufID, jint priority, jstring tagObj, jstring msgObj) 101{ 102 const char* tag = NULL; 103 const char* msg = NULL; 104 105 if (msgObj == NULL) { 106 jniThrowNullPointerException(env, "println needs a message"); 107 return -1; 108 } 109 110 if (bufID < 0 || bufID >= LOG_ID_MAX) { 111 jniThrowNullPointerException(env, "bad bufID"); 112 return -1; 113 } 114 115 if (tagObj != NULL) 116 tag = env->GetStringUTFChars(tagObj, NULL); 117 msg = env->GetStringUTFChars(msgObj, NULL); 118 119 int res = __android_log_buf_write(bufID, (android_LogPriority)priority, tag, msg); 120 121 if (tag != NULL) 122 env->ReleaseStringUTFChars(tagObj, tag); 123 env->ReleaseStringUTFChars(msgObj, msg); 124 125 return res; 126} 127 128/* 129 * JNI registration. 130 */ 131static JNINativeMethod gMethods[] = { 132 /* name, signature, funcPtr */ 133 { "isLoggable", "(Ljava/lang/String;I)Z", (void*) android_util_Log_isLoggable }, 134 { "println_native", "(IILjava/lang/String;Ljava/lang/String;)I", (void*) android_util_Log_println_native }, 135}; 136 137int register_android_util_Log(JNIEnv* env) 138{ 139 jclass clazz = env->FindClass("android/util/Log"); 140 141 if (clazz == NULL) { 142 LOGE("Can't find android/util/Log"); 143 return -1; 144 } 145 146 levels.verbose = env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "VERBOSE", "I")); 147 levels.debug = env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "DEBUG", "I")); 148 levels.info = env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "INFO", "I")); 149 levels.warn = env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "WARN", "I")); 150 levels.error = env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "ERROR", "I")); 151 levels.assert = env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "ASSERT", "I")); 152 153 return AndroidRuntime::registerNativeMethods(env, "android/util/Log", gMethods, NELEM(gMethods)); 154} 155 156}; // namespace android 157