37 lines
860 B
C++
37 lines
860 B
C++
#include <cstdint>
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using u8 = std::uint8_t;
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using i8 = std::int8_t;
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using u16 = std::uint16_t;
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using i16 = std::int16_t;
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using u32 = std::uint32_t;
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using i32 = std::int32_t;
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using u64 = std::uint64_t;
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using i64 = std::int64_t;
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using usize = std::uintptr_t;
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using isize = std::intptr_t;
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inline auto rune_to_string(uint32_t cp) -> char const * {
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static char utf8[5] = {0};
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for (auto &c : utf8)
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c = 0;
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if (cp < 0x80) {
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utf8[0] = cp;
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} else if (cp < 0x800) {
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utf8[0] = 0xC0 | (cp >> 6);
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utf8[1] = 0x80 | (cp & 0x3F);
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} else if (cp < 0x10000) {
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utf8[0] = 0xE0 | (cp >> 12);
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utf8[1] = 0x80 | ((cp >> 6) & 0x3F);
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utf8[2] = 0x80 | (cp & 0x3F);
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} else {
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utf8[0] = 0xF0 | (cp >> 18);
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utf8[1] = 0x80 | ((cp >> 12) & 0x3F);
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utf8[2] = 0x80 | ((cp >> 6) & 0x3F);
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utf8[3] = 0x80 | (cp & 0x3F);
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}
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return utf8;
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}
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