1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright (C) 2023 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.
*/
#define LOG_NAMESPACE "TeX.tag."
#define LOG_TAG "TeX"
#include <log/log.h>
#include <nativehelper/scoped_local_ref.h>
#include <nativehelper/scoped_utf_chars.h>
#include <utils/hash/farmhash.h>
// ----------------------------------------------------------------------------
// JNI Glue
// ----------------------------------------------------------------------------
static jclass gStringClass = nullptr;
/**
* Class: com_android_modules_expresslog_Utils
* Method: hashString
* Signature: (Ljava/lang/String;)J
*/
static jlong hashString(JNIEnv* env, jclass /*class*/, jstring metricNameObj) {
ScopedUtfChars name(env, metricNameObj);
if (name.c_str() == nullptr) {
return 0;
}
return static_cast<jlong>(farmhash::Fingerprint64(name.c_str(), name.size()));
}
static const JNINativeMethod gMethods[] = {
{"hashString", "(Ljava/lang/String;)J", (void*)hashString},
};
namespace android {
int register_com_android_modules_expresslog_Utils(JNIEnv* env) {
static const char* const kUtilsClassName = "com/android/modules/expresslog/Utils";
static const char* const kStringClassName = "java/lang/String";
ScopedLocalRef<jclass> utilsCls(env, env->FindClass(kUtilsClassName));
if (utilsCls.get() == nullptr) {
ALOGE("jni expresslog registration failure, class not found '%s'", kUtilsClassName);
return JNI_ERR;
}
jclass stringClass = env->FindClass(kStringClassName);
if (stringClass == nullptr) {
ALOGE("jni expresslog registration failure, class not found '%s'", kStringClassName);
return JNI_ERR;
}
gStringClass = static_cast<jclass>(env->NewGlobalRef(stringClass));
if (gStringClass == nullptr) {
ALOGE("jni expresslog Unable to create global reference '%s'", kStringClassName);
return JNI_ERR;
}
const jint count = sizeof(gMethods) / sizeof(gMethods[0]);
int status = env->RegisterNatives(utilsCls.get(), gMethods, count);
if (status < 0) {
ALOGE("jni expresslog registration failure, status: %d", status);
return JNI_ERR;
}
return JNI_VERSION_1_4;
}
} // namespace android
|
