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 <nativehelper/JniConstants.h>
21
22 #include "JniException.h"
23 #include "ZipUtilities.h"
24
throwExceptionForZlibError(JNIEnv * env,const char * exceptionClassName,int error,NativeZipStream * stream)25 void throwExceptionForZlibError(JNIEnv* env, const char* exceptionClassName, int error,
26 NativeZipStream* stream) {
27 if (error == Z_MEM_ERROR) {
28 jniThrowOutOfMemoryError(env, NULL);
29 } else if (stream != NULL && stream->stream.msg != NULL) {
30 jniThrowException(env, exceptionClassName, stream->stream.msg);
31 } else {
32 jniThrowException(env, exceptionClassName, zError(error));
33 }
34 }
35
NativeZipStream()36 NativeZipStream::NativeZipStream() : inCap(0), totalIn(0), totalOut(0) {
37 // Let zlib use its default allocator.
38 stream.opaque = Z_NULL;
39 stream.zalloc = Z_NULL;
40 stream.zfree = Z_NULL;
41 }
42
~NativeZipStream()43 NativeZipStream::~NativeZipStream() {
44 }
45
setDictionary(JNIEnv * env,jbyteArray javaDictionary,int off,int len,bool inflate)46 void NativeZipStream::setDictionary(JNIEnv* env, jbyteArray javaDictionary, int off, int len,
47 bool inflate) {
48 std::unique_ptr<jbyte[]> dictionaryBytes(new jbyte[len]);
49 if (dictionaryBytes.get() == NULL) {
50 jniThrowOutOfMemoryError(env, NULL);
51 return;
52 }
53 env->GetByteArrayRegion(javaDictionary, off, len, &dictionaryBytes[0]);
54 const Bytef* dictionary = reinterpret_cast<const Bytef*>(&dictionaryBytes[0]);
55 int err;
56 if (inflate) {
57 err = inflateSetDictionary(&stream, dictionary, len);
58 } else {
59 err = deflateSetDictionary(&stream, dictionary, len);
60 }
61 if (err != Z_OK) {
62 throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err, NULL);
63 return;
64 }
65 mDict.reset(dictionaryBytes.release());
66 }
67
setInput(JNIEnv * env,jbyteArray buf,jint off,jint len)68 void NativeZipStream::setInput(JNIEnv* env, jbyteArray buf, jint off, jint len) {
69 input.reset(new jbyte[len]);
70 if (input.get() == NULL) {
71 inCap = 0;
72 jniThrowOutOfMemoryError(env, NULL);
73 return;
74 }
75 inCap = len;
76 if (buf != NULL) {
77 env->GetByteArrayRegion(buf, off, len, &input[0]);
78 }
79 stream.next_in = reinterpret_cast<Bytef*>(&input[0]);
80 stream.avail_in = len;
81 }
82
toNativeZipStream(jlong address)83 NativeZipStream* toNativeZipStream(jlong address) {
84 return reinterpret_cast<NativeZipStream*>(static_cast<uintptr_t>(address));
85 }
86