39 行
1.2 KiB
C++
39 行
1.2 KiB
C++
#pragma once
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//required bytes: ceil(bits / log2(base))
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//base57 => 128=22, 256=44, 512=88
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//base62 => 128=22, 256=43, 512=86
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//base64 => 128=22, 256=43, 512=86
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#include <nall/arithmetic.hpp>
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namespace nall::Encode {
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template<u32 Bits, typename T> inline auto Base(T value) -> string {
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static const string format =
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Bits == 2 ? "01"
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: Bits == 8 ? "01234567"
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: Bits == 10 ? "0123456789"
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: Bits == 16 ? "0123456789abcdef"
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: Bits == 32 ? "0123456789abcdefghijklmnopqrstuv"
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: Bits == 34 ? "023456789abcdefghijkmnopqrstuvwxyz" //1l
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: Bits == 36 ? "0123456789abcdefghijklmnopqrstuvwxyz"
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: Bits == 57 ? "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz" //01IOl
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: Bits == 62 ? "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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: Bits == 64 ? "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz{}"
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: Bits == 85 ? "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%()+,-.:;=@[]^_`{|}~" //\ "&'*/<>?
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: "";
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static const u32 size = ceil(sizeof(T) * 8 / log2(Bits));
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string result;
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result.resize(size);
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char* data = result.get() + size;
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for(auto byte : result) {
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*--data = format[value % Bits];
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value /= Bits;
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}
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return result;
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}
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}
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