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Diffstat (limited to 'include/utils/StreamingZipInflater.h')
-rw-r--r-- | include/utils/StreamingZipInflater.h | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/include/utils/StreamingZipInflater.h b/include/utils/StreamingZipInflater.h deleted file mode 100644 index 3ace5d5..0000000 --- a/include/utils/StreamingZipInflater.h +++ /dev/null @@ -1,84 +0,0 @@ -/* - * Copyright (C) 2010 The Android Open Source Project - * - * Licensed 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. - */ - -#ifndef __LIBS_STREAMINGZIPINFLATER_H -#define __LIBS_STREAMINGZIPINFLATER_H - -#include <unistd.h> -#include <inttypes.h> -#include <zlib.h> - -#include <utils/Compat.h> - -namespace android { - -class StreamingZipInflater { -public: - static const size_t INPUT_CHUNK_SIZE = 64 * 1024; - static const size_t OUTPUT_CHUNK_SIZE = 64 * 1024; - - // Flavor that pages in the compressed data from a fd - StreamingZipInflater(int fd, off64_t compDataStart, size_t uncompSize, size_t compSize); - - // Flavor that gets the compressed data from an in-memory buffer - StreamingZipInflater(class FileMap* dataMap, size_t uncompSize); - - ~StreamingZipInflater(); - - // read 'count' bytes of uncompressed data from the current position. outBuf may - // be NULL, in which case the data is consumed and discarded. - ssize_t read(void* outBuf, size_t count); - - // seeking backwards requires uncompressing fom the beginning, so is very - // expensive. seeking forwards only requires uncompressing from the current - // position to the destination. - off64_t seekAbsolute(off64_t absoluteInputPosition); - -private: - void initInflateState(); - int readNextChunk(); - - // where to find the uncompressed data - int mFd; - off64_t mInFileStart; // where the compressed data lives in the file - class FileMap* mDataMap; - - z_stream mInflateState; - bool mStreamNeedsInit; - - // output invariants for this asset - uint8_t* mOutBuf; // output buf for decompressed bytes - size_t mOutBufSize; // allocated size of mOutBuf - size_t mOutTotalSize; // total uncompressed size of the blob - - // current output state bookkeeping - off64_t mOutCurPosition; // current position in total offset - size_t mOutLastDecoded; // last decoded byte + 1 in mOutbuf - size_t mOutDeliverable; // next undelivered byte of decoded output in mOutBuf - - // input invariants - uint8_t* mInBuf; - size_t mInBufSize; // allocated size of mInBuf; - size_t mInTotalSize; // total size of compressed data for this blob - - // input state bookkeeping - size_t mInNextChunkOffset; // offset from start of blob at which the next input chunk lies - // the z_stream contains state about input block consumption -}; - -} - -#endif |