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30 lines
828 B
C++
30 lines
828 B
C++
#ifndef OPENMW_CONSTRAINEDFILESTREAMBUF_H
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#define OPENMW_CONSTRAINEDFILESTREAMBUF_H
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#include "lowlevelfile.hpp"
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#include <streambuf>
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namespace Files
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{
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/// A file streambuf constrained to a specific region in the file, specified by the 'start' and 'length' parameters.
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class ConstrainedFileStreamBuf final : public std::streambuf
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{
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public:
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ConstrainedFileStreamBuf(const std::string& fname, std::size_t start, std::size_t length);
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int_type underflow() final;
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pos_type seekoff(off_type offset, std::ios_base::seekdir whence, std::ios_base::openmode mode) final;
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pos_type seekpos(pos_type pos, std::ios_base::openmode mode) final;
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private:
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std::size_t mOrigin;
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std::size_t mSize;
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LowLevelFile mFile;
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char mBuffer[8192]{0};
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};
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}
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#endif
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