41 lines
785 B
C++
41 lines
785 B
C++
// Copyright 2023 xensik. All rights reserved.
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//
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// Use of this source code is governed by a GNU GPLv3 license
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// that can be found in the LICENSE file.
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#include "xsk/stdinc.hpp"
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#include "xsk/arc/common/lookahead.hpp"
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namespace xsk::arc
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{
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lookahead::lookahead(char const* data, usize size) : buffer_pos{ 0 }, available{ 0 }, last_byte{ 0 }, curr_byte{ 0 }
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{
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if (data && size)
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{
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buffer_pos = data;
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available = size;
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last_byte = 0;
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curr_byte = *data;
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}
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}
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auto lookahead::advance() -> void
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{
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++buffer_pos;
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if (available-- == 1)
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{
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available = 0;
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last_byte = curr_byte;
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curr_byte = 0;
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}
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else
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{
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last_byte = curr_byte;
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curr_byte = *buffer_pos;
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}
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}
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} // namespace xsk::arc
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