| /* |
| * 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 "Deflater" |
| |
| #include "JniConstants.h" |
| #include "ScopedPrimitiveArray.h" |
| #include "zip.h" |
| |
| static void Deflater_setDictionaryImpl(JNIEnv* env, jobject, jbyteArray dict, int off, int len, jlong handle) { |
| toNativeZipStream(handle)->setDictionary(env, dict, off, len, false); |
| } |
| |
| static jlong Deflater_getTotalInImpl(JNIEnv*, jobject, jlong handle) { |
| return toNativeZipStream(handle)->stream.total_in; |
| } |
| |
| static jlong Deflater_getTotalOutImpl(JNIEnv*, jobject, jlong handle) { |
| return toNativeZipStream(handle)->stream.total_out; |
| } |
| |
| static jint Deflater_getAdlerImpl(JNIEnv*, jobject, jlong handle) { |
| return toNativeZipStream(handle)->stream.adler; |
| } |
| |
| static jlong Deflater_createStream(JNIEnv * env, jobject, jint level, jint strategy, jboolean noHeader) { |
| UniquePtr<NativeZipStream> jstream(new NativeZipStream); |
| if (jstream.get() == NULL) { |
| jniThrowOutOfMemoryError(env, NULL); |
| return -1; |
| } |
| |
| /* |
| * See zlib.h for documentation of the deflateInit2 windowBits and memLevel parameters. |
| * |
| * zconf.h says the "requirements for deflate are (in bytes): |
| * (1 << (windowBits+2)) + (1 << (memLevel+9)) |
| * that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) |
| * plus a few kilobytes for small objects." |
| */ |
| int windowBits = noHeader ? -DEF_WBITS : DEF_WBITS; |
| int memLevel = DEF_MEM_LEVEL; |
| int err = deflateInit2(&jstream->stream, level, Z_DEFLATED, windowBits, memLevel, strategy); |
| if (err != Z_OK) { |
| throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err); |
| return -1; |
| } |
| return reinterpret_cast<uintptr_t>(jstream.release()); |
| } |
| |
| static void Deflater_setInputImpl(JNIEnv* env, jobject, jbyteArray buf, jint off, jint len, jlong handle) { |
| toNativeZipStream(handle)->setInput(env, buf, off, len); |
| } |
| |
| static jint Deflater_deflateImpl(JNIEnv* env, jobject recv, jbyteArray buf, int off, int len, jlong handle, int flushStyle) { |
| 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 = deflate(&stream->stream, flushStyle); |
| switch (err) { |
| case Z_OK: |
| break; |
| case Z_STREAM_END: |
| static jfieldID finished = env->GetFieldID(JniConstants::deflaterClass, "finished", "Z"); |
| env->SetBooleanField(recv, finished, JNI_TRUE); |
| break; |
| case Z_BUF_ERROR: |
| // zlib reports this "if no progress is possible (for example avail_in or avail_out was |
| // zero) ... Z_BUF_ERROR is not fatal, and deflate() can be called again with more |
| // input and more output space to continue compressing". |
| break; |
| default: |
| throwExceptionForZlibError(env, "java/util/zip/DataFormatException", err); |
| return -1; |
| } |
| |
| jint bytesRead = stream->stream.next_in - initialNextIn; |
| jint bytesWritten = stream->stream.next_out - initialNextOut; |
| |
| static jfieldID inReadField = env->GetFieldID(JniConstants::deflaterClass, "inRead", "I"); |
| jint inReadValue = env->GetIntField(recv, inReadField); |
| inReadValue += bytesRead; |
| env->SetIntField(recv, inReadField, inReadValue); |
| return bytesWritten; |
| } |
| |
| static void Deflater_endImpl(JNIEnv*, jobject, jlong handle) { |
| NativeZipStream* stream = toNativeZipStream(handle); |
| deflateEnd(&stream->stream); |
| delete stream; |
| } |
| |
| static void Deflater_resetImpl(JNIEnv* env, jobject, jlong handle) { |
| NativeZipStream* stream = toNativeZipStream(handle); |
| int err = deflateReset(&stream->stream); |
| if (err != Z_OK) { |
| throwExceptionForZlibError(env, "java/lang/IllegalArgumentException", err); |
| } |
| } |
| |
| static void Deflater_setLevelsImpl(JNIEnv* env, jobject, int level, int strategy, jlong handle) { |
| NativeZipStream* stream = toNativeZipStream(handle); |
| // The deflateParams documentation says that avail_out must never be 0 because it may be |
| // necessary to flush, but the Java API ensures that we only get here if there's nothing |
| // to flush. To be on the safe side, make sure that we're not pointing to a no longer valid |
| // buffer. |
| stream->stream.next_out = reinterpret_cast<Bytef*>(NULL); |
| stream->stream.avail_out = 0; |
| int err = deflateParams(&stream->stream, level, strategy); |
| if (err != Z_OK) { |
| throwExceptionForZlibError(env, "java/lang/IllegalStateException", err); |
| } |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| NATIVE_METHOD(Deflater, createStream, "(IIZ)J"), |
| NATIVE_METHOD(Deflater, deflateImpl, "([BIIJI)I"), |
| NATIVE_METHOD(Deflater, endImpl, "(J)V"), |
| NATIVE_METHOD(Deflater, getAdlerImpl, "(J)I"), |
| NATIVE_METHOD(Deflater, getTotalInImpl, "(J)J"), |
| NATIVE_METHOD(Deflater, getTotalOutImpl, "(J)J"), |
| NATIVE_METHOD(Deflater, resetImpl, "(J)V"), |
| NATIVE_METHOD(Deflater, setDictionaryImpl, "([BIIJ)V"), |
| NATIVE_METHOD(Deflater, setInputImpl, "([BIIJ)V"), |
| NATIVE_METHOD(Deflater, setLevelsImpl, "(IIJ)V"), |
| }; |
| int register_java_util_zip_Deflater(JNIEnv* env) { |
| return jniRegisterNativeMethods(env, "java/util/zip/Deflater", gMethods, NELEM(gMethods)); |
| } |