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/*
* Copyright 2010, 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_TAG "ObbScanner"
#include <utils/Log.h>
#include <utils/String8.h>
#include <androidfw/ObbFile.h>
#include "jni.h"
#include "JNIHelp.h"
#include "utils/misc.h"
#include "android_runtime/AndroidRuntime.h"
namespace android {
static struct {
jclass clazz;
jfieldID packageName;
jfieldID version;
jfieldID flags;
jfieldID salt;
} gObbInfoClassInfo;
static void android_content_res_ObbScanner_getObbInfo(JNIEnv* env, jobject clazz, jstring file,
jobject obbInfo)
{
const char* filePath = env->GetStringUTFChars(file, NULL);
sp<ObbFile> obb = new ObbFile();
if (!obb->readFrom(filePath)) {
env->ReleaseStringUTFChars(file, filePath);
jniThrowException(env, "java/io/IOException", "Could not read OBB file");
return;
}
env->ReleaseStringUTFChars(file, filePath);
const char* packageNameStr = obb->getPackageName().string();
jstring packageName = env->NewStringUTF(packageNameStr);
if (packageName == NULL) {
jniThrowException(env, "java/io/IOException", "Could not read OBB file");
return;
}
env->SetObjectField(obbInfo, gObbInfoClassInfo.packageName, packageName);
env->SetIntField(obbInfo, gObbInfoClassInfo.version, obb->getVersion());
env->SetIntField(obbInfo, gObbInfoClassInfo.flags, obb->getFlags());
size_t saltLen;
const unsigned char* salt = obb->getSalt(&saltLen);
if (saltLen > 0) {
jbyteArray saltArray = env->NewByteArray(saltLen);
env->SetByteArrayRegion(saltArray, 0, saltLen, (jbyte*)salt);
env->SetObjectField(obbInfo, gObbInfoClassInfo.salt, saltArray);
}
}
/*
* JNI registration.
*/
static JNINativeMethod gMethods[] = {
/* name, signature, funcPtr */
{ "getObbInfo_native", "(Ljava/lang/String;Landroid/content/res/ObbInfo;)V",
(void*) android_content_res_ObbScanner_getObbInfo },
};
#define FIND_CLASS(var, className) \
var = env->FindClass(className); \
LOG_FATAL_IF(! var, "Unable to find class " className);
#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find field " fieldName);
int register_android_content_res_ObbScanner(JNIEnv* env)
{
jclass clazz;
FIND_CLASS(clazz, "android/content/res/ObbInfo");
GET_FIELD_ID(gObbInfoClassInfo.packageName, clazz,
"packageName", "Ljava/lang/String;");
GET_FIELD_ID(gObbInfoClassInfo.version, clazz,
"version", "I");
GET_FIELD_ID(gObbInfoClassInfo.flags, clazz,
"flags", "I");
GET_FIELD_ID(gObbInfoClassInfo.salt, clazz,
"salt", "[B");
return AndroidRuntime::registerNativeMethods(env, "android/content/res/ObbScanner", gMethods,
NELEM(gMethods));
}
}; // namespace android
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