mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 21:34:08 -07:00
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Stream.h"
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namespace DatafileIO
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{
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class SeekableInputStream_mem : public SeekableInputStream
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{
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public:
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// 'Release' provides common buffer-release mechanisms, called
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// when this stream is destroyed
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struct Releaser {
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virtual void release(char* buffer) = 0;
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};
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struct Releaser_None : public Releaser {
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virtual void release(char* /*buffer*/) {};
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};
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struct Releaser_StreamBuffer : public Releaser {
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Releaser_StreamBuffer(InputStream* s) : stream(s) {}
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InputStream* stream;
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virtual void release(char* buffer) {
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stream->ReleaseBuffer(buffer);
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}
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};
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struct Releaser_NewArray : public Releaser {
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virtual void release(char* buffer) {
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delete[] buffer;
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}
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};
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SeekableInputStream_mem(char* data, size_t size, Releaser* releaser);
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~SeekableInputStream_mem();
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virtual off_t Tell() const;
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virtual bool IsOk() const;
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virtual void Seek(off_t pos, Stream::whence mode);
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virtual size_t Read(void* buffer, size_t size);
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virtual bool AcquireBuffer(void*& buffer, size_t& size, size_t max_size);
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virtual void ReleaseBuffer(void* buffer);
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private:
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Releaser* m_Releaser;
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char* m_Data;
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size_t m_Size;
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off_t m_Cursor;
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};
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// Magically decompresses l33t-compressed files.
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class Maybel33tInputStream : public SeekableInputStream
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{
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public:
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// Take ownership of a SeekableInputStream
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Maybel33tInputStream(SeekableInputStream* stream);
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~Maybel33tInputStream();
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virtual off_t Tell() const;
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virtual bool IsOk() const;
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virtual void Seek(off_t pos, Stream::whence mode);
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virtual size_t Read(void* buffer, size_t size);
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virtual bool AcquireBuffer(void*& buffer, size_t& size, size_t max_size);
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virtual void ReleaseBuffer(void* buffer);
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private:
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SeekableInputStream* m_Stream;
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};
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}
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