283 static constexpr bool is_any_surrogate(char16_t w) {  in is_any_surrogate()  argument
284     return (w & 0xf800) == 0xd800;  in is_any_surrogate()
305         char16_t w = *in++;  in utf16_to_utf8_length()  local
306         if (w < 0x0080) [[likely]] {  in utf16_to_utf8_length()
310         if (w < 0x0800) [[likely]] {  in utf16_to_utf8_length()
314         if (!is_any_surrogate(w)) [[likely]] {  in utf16_to_utf8_length()
318         if (in < end && is_surrogate_pair(w, *in)) {  in utf16_to_utf8_length()
346         char16_t w = *in++;  in utf16_to_utf8()  local
347         if (w < 0x0080) [[likely]] {  in utf16_to_utf8()
350             *out++ = (char)(w & 0xff);  in utf16_to_utf8()
353         if (w < 0x0800) [[likely]] {  in utf16_to_utf8()
356             *out++ = (char)(0xc0 | ((w >> 6) & 0x1f));  in utf16_to_utf8()
357             *out++ = (char)(0x80 | ((w >> 0) & 0x3f));  in utf16_to_utf8()
360         if (!is_any_surrogate(w)) [[likely]] {  in utf16_to_utf8()
363             *out++ = (char)(0xe0 | ((w >> 12) & 0xf));  in utf16_to_utf8()
364             *out++ = (char)(0x80 | ((w >> 6) & 0x3f));  in utf16_to_utf8()
365             *out++ = (char)(0x80 | ((w >> 0) & 0x3f));  in utf16_to_utf8()
369         if (in < in_end && (w2 = *in, is_surrogate_pair(w, w2))) {  in utf16_to_utf8()
372             char32_t dw = (char32_t)(0x10000 + ((w - 0xd800) << 10) + (w2 - 0xdc00));  in utf16_to_utf8()
480     char32_t w;  in utf8_to_utf16_no_null_terminator()  local
523             w = utf8_4b_to_utf32(c, c2, c3, c4);  in utf8_to_utf16_no_null_terminator()
524             if (w < 0x10000) [[unlikely]] {  in utf8_to_utf16_no_null_terminator()
525                 *out++ = (char16_t)(w);  in utf8_to_utf16_no_null_terminator()
531                 *out++ = (char16_t)(((w - 0x10000) >> 10) + 0xd800);  in utf8_to_utf16_no_null_terminator()
532                 *out++ = (char16_t)(((w - 0x10000) & 0x3ff) + 0xdc00);  in utf8_to_utf16_no_null_terminator()