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Merge branch 'RP5C01' of github.com:TomHarte/CLK into RP5C01
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commit
9588c9bee2
@ -23,19 +23,20 @@ template <int... Sizes> class NumericCoder {
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/// Modifies @c target to hold @c value at @c index.
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/// Modifies @c target to hold @c value at @c index.
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template <int index> static void encode(int &target, int value) {
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template <int index> static void encode(int &target, int value) {
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static_assert(index < sizeof...(Sizes), "Index must be within range");
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static_assert(index < sizeof...(Sizes), "Index must be within range");
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NumericEncoderImp<Sizes...>::template encode<index, 0, 1>(target, value);
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NumericEncoder<Sizes...>::template encode<index>(target, value);
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}
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}
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/// @returns The value from @c source at @c index.
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/// @returns The value from @c source at @c index.
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template <int index> static int decode(int source) {
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template <int index> static int decode(int source) {
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static_assert(index < sizeof...(Sizes), "Index must be within range");
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static_assert(index < sizeof...(Sizes), "Index must be within range");
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return NumericEncoderImp<Sizes...>::template decode<index, 0, 1>(source);
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return NumericDecoder<Sizes...>::template decode<index>(source);
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}
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}
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private:
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private:
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template <int size, int... Tail>
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template <int size, int... Tail>
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struct NumericEncoderImp {
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struct NumericEncoder {
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template <int index, int i, int divider> static void encode(int &target, int value) {
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template <int index, int i = 0, int divider = 1> static void encode(int &target, int value) {
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if constexpr (i == index) {
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if constexpr (i == index) {
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const int suffix = target % divider;
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const int suffix = target % divider;
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target /= divider;
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target /= divider;
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@ -44,18 +45,20 @@ template <int... Sizes> class NumericCoder {
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target *= divider;
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target *= divider;
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target += suffix;
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target += suffix;
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} else {
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} else {
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NumericEncoderImp<Tail...>::template encode<index, i+1, divider*size>(target, value);
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NumericEncoder<Tail...>::template encode<index, i+1, divider*size>(target, value);
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}
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}
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}
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}
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};
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template <int index, int i, int divider> static int decode(int source) {
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template <int size, int... Tail>
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struct NumericDecoder {
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template <int index, int i = 0, int divider = 1> static int decode(int source) {
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if constexpr (i == index) {
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if constexpr (i == index) {
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return (source / divider) % size;
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return (source / divider) % size;
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} else {
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} else {
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return NumericEncoderImp<Tail...>::template decode<index, i+1, divider*size>(source);
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return NumericDecoder<Tail...>::template decode<index, i+1, divider*size>(source);
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}
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}
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}
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}
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};
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};
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};
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};
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