| /* |
| * 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. |
| */ |
| |
| #define LOG_TAG "Inflater" |
| |
| #include "JniConstants.h" |
| #include "ScopedPrimitiveArray.h" |
| #include "zip.h" |
| #include <errno.h> |
| |
| static struct { |
| jfieldID inRead; |
| jfieldID finished; |
| jfieldID needsDictionary; |
| } gCachedFields; |
| |
| /* Create a new stream . This stream cannot be used until it has been properly initialized. */ |
| static jlong Inflater_createStream(JNIEnv* env, jobject, jboolean noHeader) { |
| UniquePtr<NativeZipStream> jstream(new NativeZipStream); |
| if (jstream.get() == NULL) { |
| jniThrowOutOfMemoryError(env, NULL); |
| return -1; |
| } |
| jstream->stream.adler = 1; |
| |
| /* |
| * In the range 8..15 for checked, or -8..-15 for unchecked inflate. Unchecked |
| * is appropriate for formats like zip that do their own validity checking. |
| */ |
| /* Window bits to use. 15 is fastest but consumes the most memory */ |
| int wbits = 15; /*Use MAX for fastest */ |
| if (noHeader) { |
| wbits = wbits / -1; |
| } |
| int err = inflateInit2(&jstream->stream, wbits); |
| if (err != Z_OK) { |
| throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err); |
| return -1; |
| } |
| return reinterpret_cast<uintptr_t>(jstream.release()); |
| } |
| |
| static void Inflater_setInputImpl(JNIEnv* env, jobject, jbyteArray buf, jint off, jint len, jlong handle) { |
| toNativeZipStream(handle)->setInput(env, buf, off, len); |
| } |
| |
| static jint Inflater_setFileInputImpl(JNIEnv* env, jobject, jobject javaFileDescriptor, jlong off, jint len, jlong handle) { |
| NativeZipStream* stream = toNativeZipStream(handle); |
| |
| // We reuse the existing native buffer if it's large enough. |
| // TODO: benchmark. |
| if (stream->inCap < len) { |
| stream->setInput(env, NULL, 0, len); |
| } else { |
| stream->stream.next_in = reinterpret_cast<Bytef*>(&stream->input[0]); |
| stream->stream.avail_in = len; |
| } |
| |
| // As an Android-specific optimization, we read directly onto the native heap. |
| // The original code used Java to read onto the Java heap and then called setInput(byte[]). |
| // TODO: benchmark. |
| int fd = jniGetFDFromFileDescriptor(env, javaFileDescriptor); |
| int rc = TEMP_FAILURE_RETRY(lseek(fd, off, SEEK_SET)); |
| if (rc == -1) { |
| jniThrowIOException(env, errno); |
| return 0; |
| } |
| jint totalByteCount = 0; |
| Bytef* dst = reinterpret_cast<Bytef*>(&stream->input[0]); |
| ssize_t byteCount; |
| while ((byteCount = TEMP_FAILURE_RETRY(read(fd, dst, len))) > 0) { |
| dst += byteCount; |
| len -= byteCount; |
| totalByteCount += byteCount; |
| } |
| if (byteCount == -1) { |
| jniThrowIOException(env, errno); |
| return 0; |
| } |
| return totalByteCount; |
| } |
| |
| static jint Inflater_inflateImpl(JNIEnv* env, jobject recv, jbyteArray buf, int off, int len, jlong handle) { |
| NativeZipStream* stream = toNativeZipStream(handle); |
| ScopedByteArrayRW out(env, buf); |
| if (out.get() == NULL) { |
| return -1; |
| } |
| stream->stream.next_out = reinterpret_cast<Bytef*>(out.get() + off); |
| stream->stream.avail_out = len; |
| |
| Bytef* initialNextIn = stream->stream.next_in; |
| Bytef* initialNextOut = stream->stream.next_out; |
| |
| int err = inflate(&stream->stream, Z_SYNC_FLUSH); |
| if (err != Z_OK) { |
| if (err == Z_STREAM_ERROR) { |
| return 0; |
| } |
| if (err == Z_STREAM_END) { |
| env->SetBooleanField(recv, gCachedFields.finished, JNI_TRUE); |
| } else if (err == Z_NEED_DICT) { |
| env->SetBooleanField(recv, gCachedFields.needsDictionary, JNI_TRUE); |
| } else { |
| throwExceptionForZlibError(env, "java/util/zip/DataFormatException", err); |
| return -1; |
| } |
| } |
| |
| jint bytesRead = stream->stream.next_in - initialNextIn; |
| jint bytesWritten = stream->stream.next_out - initialNextOut; |
| |
| jint inReadValue = env->GetIntField(recv, gCachedFields.inRead); |
| inReadValue += bytesRead; |
| env->SetIntField(recv, gCachedFields.inRead, inReadValue); |
| return bytesWritten; |
| } |
| |
| static jint Inflater_getAdlerImpl(JNIEnv*, jobject, jlong handle) { |
| return toNativeZipStream(handle)->stream.adler; |
| } |
| |
| static void Inflater_endImpl(JNIEnv*, jobject, jlong handle) { |
| NativeZipStream* stream = toNativeZipStream(handle); |
| inflateEnd(&stream->stream); |
| delete stream; |
| } |
| |
| static void Inflater_setDictionaryImpl(JNIEnv* env, jobject, jbyteArray dict, int off, int len, jlong handle) { |
| toNativeZipStream(handle)->setDictionary(env, dict, off, len, true); |
| } |
| |
| static void Inflater_resetImpl(JNIEnv* env, jobject, jlong handle) { |
| int err = inflateReset(&toNativeZipStream(handle)->stream); |
| if (err != Z_OK) { |
| throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err); |
| } |
| } |
| |
| static jlong Inflater_getTotalOutImpl(JNIEnv*, jobject, jlong handle) { |
| return toNativeZipStream(handle)->stream.total_out; |
| } |
| |
| static jlong Inflater_getTotalInImpl(JNIEnv*, jobject, jlong handle) { |
| return toNativeZipStream(handle)->stream.total_in; |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| NATIVE_METHOD(Inflater, createStream, "(Z)J"), |
| NATIVE_METHOD(Inflater, endImpl, "(J)V"), |
| NATIVE_METHOD(Inflater, getAdlerImpl, "(J)I"), |
| NATIVE_METHOD(Inflater, getTotalInImpl, "(J)J"), |
| NATIVE_METHOD(Inflater, getTotalOutImpl, "(J)J"), |
| NATIVE_METHOD(Inflater, inflateImpl, "([BIIJ)I"), |
| NATIVE_METHOD(Inflater, resetImpl, "(J)V"), |
| NATIVE_METHOD(Inflater, setDictionaryImpl, "([BIIJ)V"), |
| NATIVE_METHOD(Inflater, setFileInputImpl, "(Ljava/io/FileDescriptor;JIJ)I"), |
| NATIVE_METHOD(Inflater, setInputImpl, "([BIIJ)V"), |
| }; |
| int register_java_util_zip_Inflater(JNIEnv* env) { |
| gCachedFields.finished = env->GetFieldID(JniConstants::inflaterClass, "finished", "Z"); |
| gCachedFields.inRead = env->GetFieldID(JniConstants::inflaterClass, "inRead", "I"); |
| gCachedFields.needsDictionary = env->GetFieldID(JniConstants::inflaterClass, "needsDictionary", "Z"); |
| return jniRegisterNativeMethods(env, "java/util/zip/Inflater", gMethods, NELEM(gMethods)); |
| } |