74cc187749
comments claim return is len of data, but negative numbers for compressed data errors are returned. Make things return the amount of successful data read and turn into unsigned size_t to match ofz#727 Change-Id: Iadddfae67bb5d4960ddf82e169fc2592ded85950 Reviewed-on: https://gerrit.libreoffice.org/35077 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Caolán McNamara <caolanm@redhat.com> Tested-by: Caolán McNamara <caolanm@redhat.com>
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_HWPFILTER_SOURCE_HGZIP_H
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#define INCLUDED_HWPFILTER_SOURCE_HGZIP_H
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#include <zlib.h>
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class HStream;
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/**
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* @short Structure for using z_stream
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*/
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struct gz_stream
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{
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z_stream stream;
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/**
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* The error code of z_stream operation
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*/
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int z_err;
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/**
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* EOF of the input file
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*/
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int z_eof;
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/**
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* Stream
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*/
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HStream* _inputstream;
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/**
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* Input buffer
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*/
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Byte *inbuf;
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/**
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* Crc32 of uncompressed data
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*/
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uLong crc;
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/**
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* Stream
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*/
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char *msg;
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/**
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* 'w' or 'r'
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*/
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char mode;
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};
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/**
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* Opens a gzipped stream for reading.
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* gz_open returns NULL if the stream could not be opened or if there was
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* insufficient memory to allocate the (de)compression state; errno
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* can be checked to distinguish the two cases (if errno is zero, the
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* zlib error is Z_MEM_ERROR).
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* @param _stream Reference of stream object having binary data.
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*/
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gz_stream *gz_open ( HStream& _stream );
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/**
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* Flushes all pending output if necessary, closes the compressed stream
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* and deallocates all the (de)compression state
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*/
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int gz_close ( gz_stream *file );
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/**
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* Reads the given number of uncompressed bytes from the compressed stream
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* @param file Gzipped stream
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* @param buf Buffer to have the data to be read
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* @param len Length of data to be read
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* @returns The number of bytes actually read
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*/
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size_t gz_read ( gz_stream *file, voidp buf, unsigned len );
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/**
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* Flushes all pending output into the compressed file
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* gz_flush should be called only when strictly necessary because it can
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* degrade compression
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* @param flush Is as in the deflate() function
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*/
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int gz_flush ( gz_stream *file, int flush );
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#endif // INCLUDED_HWPFILTER_SOURCE_HGZIP_H
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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