1/*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements.  See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 */
17
18#include <memory>
19
20#include "JniConstants.h"
21#include "JniException.h"
22#include "ZipUtilities.h"
23
24void throwExceptionForZlibError(JNIEnv* env, const char* exceptionClassName, int error,
25    NativeZipStream* stream) {
26  if (error == Z_MEM_ERROR) {
27    jniThrowOutOfMemoryError(env, NULL);
28  } else if (stream != NULL && stream->stream.msg != NULL) {
29    jniThrowException(env, exceptionClassName, stream->stream.msg);
30  } else {
31    jniThrowException(env, exceptionClassName, zError(error));
32  }
33}
34
35NativeZipStream::NativeZipStream() : inCap(0), totalIn(0), totalOut(0) {
36  // Let zlib use its default allocator.
37  stream.opaque = Z_NULL;
38  stream.zalloc = Z_NULL;
39  stream.zfree = Z_NULL;
40}
41
42NativeZipStream::~NativeZipStream() {
43}
44
45void NativeZipStream::setDictionary(JNIEnv* env, jbyteArray javaDictionary, int off, int len,
46    bool inflate) {
47  std::unique_ptr<jbyte[]> dictionaryBytes(new jbyte[len]);
48  if (dictionaryBytes.get() == NULL) {
49    jniThrowOutOfMemoryError(env, NULL);
50    return;
51  }
52  env->GetByteArrayRegion(javaDictionary, off, len, &dictionaryBytes[0]);
53  const Bytef* dictionary = reinterpret_cast<const Bytef*>(&dictionaryBytes[0]);
54  int err;
55  if (inflate) {
56    err = inflateSetDictionary(&stream, dictionary, len);
57  } else {
58    err = deflateSetDictionary(&stream, dictionary, len);
59  }
60  if (err != Z_OK) {
61    throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err, NULL);
62    return;
63  }
64  mDict.reset(dictionaryBytes.release());
65}
66
67void NativeZipStream::setInput(JNIEnv* env, jbyteArray buf, jint off, jint len) {
68  input.reset(new jbyte[len]);
69  if (input.get() == NULL) {
70    inCap = 0;
71    jniThrowOutOfMemoryError(env, NULL);
72    return;
73  }
74  inCap = len;
75  if (buf != NULL) {
76    env->GetByteArrayRegion(buf, off, len, &input[0]);
77  }
78  stream.next_in = reinterpret_cast<Bytef*>(&input[0]);
79  stream.avail_in = len;
80}
81
82NativeZipStream* toNativeZipStream(jlong address) {
83  return reinterpret_cast<NativeZipStream*>(static_cast<uintptr_t>(address));
84}
85