readline: simplify isFullWidthCodePoint()
The non-ICU-based isFullWidthCodePoint() can be simplified to a single `return` statement. This commit removes the extra branching logic. PR-URL: https://github.com/nodejs/node/pull/28640 Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de>
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@ -82,48 +82,38 @@ if (internalBinding('config').hasIntl) {
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* Unicode code point is full-width. Otherwise returns false.
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*/
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isFullWidthCodePoint = function isFullWidthCodePoint(code) {
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if (!Number.isInteger(code)) {
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return false;
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}
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// Code points are derived from:
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// http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt
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if (
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code >= 0x1100 && (
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code <= 0x115f || // Hangul Jamo
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code === 0x2329 || // LEFT-POINTING ANGLE BRACKET
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code === 0x232a || // RIGHT-POINTING ANGLE BRACKET
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// CJK Radicals Supplement .. Enclosed CJK Letters and Months
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code >= 0x2e80 && code <= 0x3247 && code !== 0x303f ||
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// Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A
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code >= 0x3250 && code <= 0x4dbf ||
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// CJK Unified Ideographs .. Yi Radicals
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code >= 0x4e00 && code <= 0xa4c6 ||
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// Hangul Jamo Extended-A
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code >= 0xa960 && code <= 0xa97c ||
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// Hangul Syllables
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code >= 0xac00 && code <= 0xd7a3 ||
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// CJK Compatibility Ideographs
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code >= 0xf900 && code <= 0xfaff ||
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// Vertical Forms
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code >= 0xfe10 && code <= 0xfe19 ||
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// CJK Compatibility Forms .. Small Form Variants
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code >= 0xfe30 && code <= 0xfe6b ||
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// Halfwidth and Fullwidth Forms
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code >= 0xff01 && code <= 0xff60 ||
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code >= 0xffe0 && code <= 0xffe6 ||
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// Kana Supplement
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code >= 0x1b000 && code <= 0x1b001 ||
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// Enclosed Ideographic Supplement
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code >= 0x1f200 && code <= 0x1f251 ||
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// CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane
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code >= 0x20000 && code <= 0x3fffd
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)
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) {
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return true;
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}
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return false;
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return Number.isInteger(code) && code >= 0x1100 && (
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code <= 0x115f || // Hangul Jamo
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code === 0x2329 || // LEFT-POINTING ANGLE BRACKET
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code === 0x232a || // RIGHT-POINTING ANGLE BRACKET
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// CJK Radicals Supplement .. Enclosed CJK Letters and Months
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code >= 0x2e80 && code <= 0x3247 && code !== 0x303f ||
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// Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A
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code >= 0x3250 && code <= 0x4dbf ||
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// CJK Unified Ideographs .. Yi Radicals
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code >= 0x4e00 && code <= 0xa4c6 ||
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// Hangul Jamo Extended-A
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code >= 0xa960 && code <= 0xa97c ||
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// Hangul Syllables
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code >= 0xac00 && code <= 0xd7a3 ||
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// CJK Compatibility Ideographs
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code >= 0xf900 && code <= 0xfaff ||
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// Vertical Forms
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code >= 0xfe10 && code <= 0xfe19 ||
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// CJK Compatibility Forms .. Small Form Variants
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code >= 0xfe30 && code <= 0xfe6b ||
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// Halfwidth and Fullwidth Forms
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code >= 0xff01 && code <= 0xff60 ||
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code >= 0xffe0 && code <= 0xffe6 ||
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// Kana Supplement
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code >= 0x1b000 && code <= 0x1b001 ||
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// Enclosed Ideographic Supplement
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code >= 0x1f200 && code <= 0x1f251 ||
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// CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane
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code >= 0x20000 && code <= 0x3fffd
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);
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};
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}
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