forked from OctaForge/libostd
49 lines
955 B
C++
49 lines
955 B
C++
/* Generic stream implementation for OctaSTD.
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*
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* This file is part of OctaSTD. See COPYING.md for futher information.
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*/
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#ifndef OCTA_STREAM_H
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#define OCTA_STREAM_H
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#include <stdio.h>
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#include <sys/types.h>
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#include "octa/types.h"
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#include "octa/range.h"
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namespace octa {
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/* off_t is POSIX - will also work on windows with mingw/clang, but FIXME */
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using StreamOffset = off_t;
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enum class Seek {
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cur = SEEK_CUR,
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end = SEEK_END,
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set = SEEK_SET
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};
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struct Stream {
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using Offset = StreamOffset;
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virtual void close() = 0;
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virtual bool end() = 0;
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virtual Offset size() {
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Offset p = tell();
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if ((p < 0) || !seek(0, Seek::end)) return -1;
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Offset e = tell();
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return (p == e) || (seek(p, Seek::set) ? e : -1);
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}
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virtual bool seek(Offset pos, Seek whence = Seek::set) { return false; }
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virtual Offset tell() { return -1; }
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virtual bool flush() { return true; }
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};
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}
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#endif |