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#ifndef CODEPOINT_ITERATOR_UTILITY_H_
#define CODEPOINT_ITERATOR_UTILITY_H_
#include <cstdint>
namespace UTF8 {
namespace dtl {
enum class CodeUnitType : std::uint8_t {
CONTINUATION = (128 >> 0), // 10000000
LEADING = (128 >> 1), // 01000000
THREE = (128 >> 2), // 00100000
FOUR = (128 >> 3), // 00010000
};
enum class CodePoint : std::uint8_t {
CONTINUATION = (UINT8_MAX >> 2), // 00111111
TWO = (UINT8_MAX >> 3), // 00011111
THREE = (UINT8_MAX >> 4), // 00001111
FOUR = (UINT8_MAX >> 5), // 00000111
};
inline bool match(const std::uint8_t unit, const CodeUnitType type) {
return unit & static_cast<std::uint8_t>(type);
}
inline void write(char32_t& point,
const std::uint8_t unit,
const CodePoint mask,
const std::uint8_t offset) {
point += (unit & static_cast<std::uint8_t>(mask)) << offset;
}
}
}
#endif // CODEPOINT_ITERATOR_UTILITY_H_
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