mirror of https://github.com/bsnes-emu/bsnes.git
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
#pragma once
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namespace nall {
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struct range_t {
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struct iterator {
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iterator(int position, int step = 0) : position(position), step(step) {}
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auto operator*() const -> int { return position; }
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auto operator!=(const iterator& source) const -> bool { return step > 0 ? position < source.position : position > source.position; }
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auto operator++() -> iterator& { position += step; return *this; }
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private:
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int position;
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const int step;
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};
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struct reverse_iterator {
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reverse_iterator(int position, int step = 0) : position(position), step(step) {}
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auto operator*() const -> int { return position; }
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auto operator!=(const reverse_iterator& source) const -> bool { return step > 0 ? position > source.position : position < source.position; }
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auto operator++() -> reverse_iterator& { position -= step; return *this; }
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private:
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int position;
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const int step;
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};
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auto begin() const -> iterator { return {origin, stride}; }
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auto end() const -> iterator { return {target}; }
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auto rbegin() const -> reverse_iterator { return {target - stride, stride}; }
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auto rend() const -> reverse_iterator { return {origin - stride}; }
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int origin;
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int target;
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int stride;
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};
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inline auto range(int size) {
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return range_t{0, size, 1};
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}
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inline auto range(int offset, int size) {
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return range_t{offset, size, 1};
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}
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inline auto range(int offset, int size, int step) {
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return range_t{offset, size, step};
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}
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}
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