76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CAT_MMAPFILE_HPP
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#define CAT_MMAPFILE_HPP
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#include <cat/Platform.hpp>
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#if defined(CAT_OS_WINDOWS)
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# include <cat/port/WindowsInclude.hpp>
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#endif
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namespace cat {
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class MMapFile
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{
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char *data;
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u32 len;
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s32 offset;
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#if defined(CAT_OS_LINUX)
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int fd;
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#elif defined(CAT_OS_WINDOWS)
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HANDLE hFile, hMapping;
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#endif
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public:
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MMapFile(const char *path);
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~MMapFile();
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inline bool good() { return data != 0; }
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inline bool inside() { return offset >= 0 && offset < (s32)len; }
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inline u32 size() { return len; }
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inline void seek(s32 poffset) { offset = poffset; }
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inline bool underrun(s32 requested) { return (u32)(offset + requested) > len; }
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inline char *look() { return data + offset; }
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inline char *look(s32 offset) { return data + offset; }
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inline char *read(s32 requested) { offset += requested; return data + (offset - requested); }
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inline void skip(s32 requested) { offset += requested; }
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inline u32 remaining() { return len - offset; }
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inline u32 getOffset() { return offset; }
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};
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} // namespace cat
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#endif // CAT_MMAPFILE_HPP
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