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