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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
#if !defined(zip_h)
#define zip_h
#include "JNIHelp.h"
#include "JniException.h"
#include "UniquePtr.h"
#include "jni.h"
#include "zlib.h"
#include "zutil.h"
static void throwExceptionForZlibError(JNIEnv* env, const char* exceptionClassName, int error) {
if (error == Z_MEM_ERROR) {
jniThrowOutOfMemoryError(env, NULL);
} else {
jniThrowException(env, exceptionClassName, zError(error));
}
}
class NativeZipStream {
public:
UniquePtr<jbyte[]> input;
int inCap;
z_stream stream;
NativeZipStream() : input(NULL), inCap(0), mDict(NULL) {
// Let zlib use its default allocator.
stream.opaque = Z_NULL;
stream.zalloc = Z_NULL;
stream.zfree = Z_NULL;
}
~NativeZipStream() {
}
void setDictionary(JNIEnv* env, jbyteArray javaDictionary, int off, int len, bool inflate) {
UniquePtr<jbyte[]> dictionaryBytes(new jbyte[len]);
if (dictionaryBytes.get() == NULL) {
jniThrowOutOfMemoryError(env, NULL);
return;
}
env->GetByteArrayRegion(javaDictionary, off, len, &dictionaryBytes[0]);
const Bytef* dictionary = reinterpret_cast<const Bytef*>(&dictionaryBytes[0]);
int err;
if (inflate) {
err = inflateSetDictionary(&stream, dictionary, len);
} else {
err = deflateSetDictionary(&stream, dictionary, len);
}
if (err != Z_OK) {
throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err);
return;
}
mDict.reset(dictionaryBytes.release());
}
void setInput(JNIEnv* env, jbyteArray buf, jint off, jint len) {
input.reset(new jbyte[len]);
if (input.get() == NULL) {
inCap = 0;
jniThrowOutOfMemoryError(env, NULL);
return;
}
inCap = len;
if (buf != NULL) {
env->GetByteArrayRegion(buf, off, len, &input[0]);
}
stream.next_in = reinterpret_cast<Bytef*>(&input[0]);
stream.avail_in = len;
}
private:
UniquePtr<jbyte[]> mDict;
// Disallow copy and assignment.
NativeZipStream(const NativeZipStream&);
void operator=(const NativeZipStream&);
};
static NativeZipStream* toNativeZipStream(jlong address) {
return reinterpret_cast<NativeZipStream*>(static_cast<uintptr_t>(address));
}
#endif /* zip_h */
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