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string: fix high&low UTF-16 surrogate detection

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U+D800 is a perfectly valid high surrogate. (Thou, not normal.)
While U+DC00 is a perfectly valid low surrogate.
This commit is contained in:
Simon Rozman 2024-09-27 14:09:05 +02:00
parent f87191d113
commit da11495282
1 changed files with 3 additions and 3 deletions
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6
include/stdex/string.hpp
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@ -1,4 +1,4 @@
/* /*
SPDX-License-Identifier: MIT SPDX-License-Identifier: MIT
Copyright © 2016-2024 Amebis Copyright © 2016-2024 Amebis
*/ */
@ -42,7 +42,7 @@ namespace stdex
/// ///
inline bool is_high_surrogate(_In_ utf16_t chr) inline bool is_high_surrogate(_In_ utf16_t chr)
{ {
return 0xd800 < chr && chr < 0xdc00; return 0xd800 <= chr && chr < 0xdc00;
} }
/// ///
@ -52,7 +52,7 @@ namespace stdex
/// ///
inline bool is_low_surrogate(_In_ utf16_t chr) inline bool is_low_surrogate(_In_ utf16_t chr)
{ {
return 0xdc00 < chr && chr < 0xe000; return 0xdc00 <= chr && chr < 0xe000;
} }
/// ///