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27 lines
582 B
27 lines
582 B
#include "utils/utf8.hpp" |
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#include <cstddef> |
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#include <hoehrmann_utf8.h> |
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namespace devilution { |
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char32_t DecodeFirstUtf8CodePoint(string_view input, uint8_t *len) |
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{ |
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uint32_t codepoint = 0; |
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uint32_t state = UTF8_ACCEPT; |
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for (std::size_t i = 0; i < input.size(); ++i) { |
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state = utf8_decode_step(state, static_cast<uint8_t>(input[i]), &codepoint); |
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if (state == UTF8_ACCEPT) { |
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*len = i + 1; |
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return codepoint; |
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} |
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if (state == UTF8_REJECT) { |
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*len = i + 1; |
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return Utf8DecodeError; |
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} |
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} |
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return codepoint; |
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} |
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} // namespace devilution
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