mirror of
https://github.com/scummvm/scummvm-tools.git
synced 2026-05-21 05:40:44 +00:00
Paweł Kołodziejski
107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
/* ScummVM Tools
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*
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* ScummVM Tools is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* Additionally this file is based on the ScummVM source code.
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* Copyright information for the ScummVM source code is
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* available in the COPYRIGHT file of the ScummVM source
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* distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef COMMON_ZLIB_H
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#define COMMON_ZLIB_H
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#if defined(USE_ZLIB)
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#ifdef __SYMBIAN32__
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#include <zlib\zlib.h>
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#else
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#include <zlib.h>
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#endif
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#if ZLIB_VERNUM < 0x1204
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#error Version 1.2.0.4 or newer of zlib is required for this code
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#endif
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/**
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* A simple wrapper class which can be used to wrap around an arbitrary
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* other std::ifstream and will then provide on-the-fly decompression support.
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* Assumes the compressed data to be in gzip format.
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*/
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class GZipReadStream {
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protected:
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enum {
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BUFSIZE = 16384 // 1 << MAX_WBITS
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};
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byte _buf[BUFSIZE];
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std::ifstream *_wrapped;
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z_stream _stream;
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int _zlibErr;
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uint32 _pos;
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uint32 _origSize;
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bool _eos;
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uint32 _start, _size;
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public:
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GZipReadStream(std::ifstream *w, uint32 start, uint32 size = 0);
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~GZipReadStream();
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bool err() const;
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void clearErr();
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uint32 read(void *dataPtr, uint32 dataSize);
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bool eos() const;
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int32 pos() const;
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int32 size() const;
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bool seek(int32 offset, std::ios::seekdir whence = std::ios::beg);
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};
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/**
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* A simple wrapper class which can be used to wrap around an arbitrary
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* other std::ofstream and will then provide on-the-fly compression support.
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* The compressed data is written in the gzip format.
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*/
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class GZipWriteStream {
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protected:
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enum {
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BUFSIZE = 16384 // 1 << MAX_WBITS
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};
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byte _buf[BUFSIZE];
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std::ofstream *_wrapped;
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z_stream _stream;
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int _zlibErr;
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void processData(int flushType);
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public:
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GZipWriteStream(std::ofstream *w);
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~GZipWriteStream();
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bool err() const;
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void finalize();
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uint32 write(const void *dataPtr, uint32 dataSize);
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};
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#endif
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#endif
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