1 /* //device/libs/android_runtime/android_util_Log.cpp
3 ** Copyright 2006, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
18 #define LOG_NAMESPACE "log.tag."
19 #define LOG_TAG "Log_println"
22 #include <cutils/properties.h>
23 #include <utils/Log.h>
24 #include <utils/String8.h>
28 #include "utils/misc.h"
29 #include "android_runtime/AndroidRuntime.h"
31 #define MIN(a,b) ((a<b)?a:b)
43 static levels_t levels;
45 static int toLevel(const char* value)
48 case 'V': return levels.verbose;
49 case 'D': return levels.debug;
50 case 'I': return levels.info;
51 case 'W': return levels.warn;
52 case 'E': return levels.error;
53 case 'A': return levels.assert;
54 case 'S': return -1; // SUPPRESS
59 static jboolean android_util_Log_isLoggable(JNIEnv* env, jobject clazz, jstring tag, jint level)
62 char key[PROPERTY_KEY_MAX];
63 char buf[PROPERTY_VALUE_MAX];
69 jboolean result = false;
71 const char* chars = env->GetStringUTFChars(tag, NULL);
73 if ((strlen(chars)+sizeof(LOG_NAMESPACE)) > PROPERTY_KEY_MAX) {
75 snprintf(buf2, sizeof(buf2), "Log tag \"%s\" exceeds limit of %d characters\n",
76 chars, PROPERTY_KEY_MAX - sizeof(LOG_NAMESPACE));
79 env->ReleaseStringUTFChars(tag, chars);
81 jniThrowException(env, "java/lang/IllegalArgumentException", buf2);
84 strncpy(key, LOG_NAMESPACE, sizeof(LOG_NAMESPACE)-1);
85 strcpy(key + sizeof(LOG_NAMESPACE) - 1, chars);
88 env->ReleaseStringUTFChars(tag, chars);
90 len = property_get(key, buf, "");
91 int logLevel = toLevel(buf);
92 return (logLevel >= 0 && level >= logLevel) ? true : false;
96 * In class android.util.Log:
97 * public static native int println_native(int buffer, int priority, String tag, String msg)
99 static jint android_util_Log_println_native(JNIEnv* env, jobject clazz,
100 jint bufID, jint priority, jstring tagObj, jstring msgObj)
102 const char* tag = NULL;
103 const char* msg = NULL;
105 if (msgObj == NULL) {
106 jniThrowNullPointerException(env, "println needs a message");
110 if (bufID < 0 || bufID >= LOG_ID_MAX) {
111 jniThrowNullPointerException(env, "bad bufID");
116 tag = env->GetStringUTFChars(tagObj, NULL);
117 msg = env->GetStringUTFChars(msgObj, NULL);
119 int res = __android_log_buf_write(bufID, (android_LogPriority)priority, tag, msg);
122 env->ReleaseStringUTFChars(tagObj, tag);
123 env->ReleaseStringUTFChars(msgObj, msg);
131 static 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 },
137 int register_android_util_Log(JNIEnv* env)
139 jclass clazz = env->FindClass("android/util/Log");
142 LOGE("Can't find android/util/Log");
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"));
153 return AndroidRuntime::registerNativeMethods(env, "android/util/Log", gMethods, NELEM(gMethods));
156 }; // namespace android