Generate the missing Unicode 1.1 Han character names

UnicodeData-1.1.5 uses one representative record and omits the compatibility ideographs. Generate individual formal names for the 20,902 unified and 302 compatibility ideographs listed in CJKXREF.

Assisted-By: GPT-6
Issue: #110

Author: JLHwung

scripts/parse-names.mjs

@@ -144,6 +144,21 @@ const parseNames = async (version) => {
 		}
 	}
 
+	if (version === '1.1.5') {
+		// UnicodeData-1.1.5 has one representative Han record and omits the
+		// compatibility ideographs. CJKXREF lists both complete ranges:
+		// https://www.unicode.org/Public/1.1-Update/CJKXREF.TXT
+		for (const [rangeName, start, end] of [
+			['CJK Ideograph', 0x4e00, 0x9fa5],
+			['CJK Compatibility Ideograph', 0xf900, 0xfa2d],
+		]) {
+			for (let cp = start; cp <= end; cp++) {
+				const name = getRangeName(rangeName, cp);
+				map[name] ??= regenerate();
+				map[name].add(cp);
+			}
+		}
+	}
 	return map;
 };
 

tests/legacy-names.mjs

@@ -0,0 +1,31 @@
+import { test } from 'node:test';
+import parseNames from '../scripts/parse-names.mjs';
+
+test('Unicode 1.1.5 provides formal names for its complete Han repertoire', async (t) => {
+	const names = await parseNames('1.1.5');
+	for (const [cp, name] of [
+		[0x4e00, 'CJK UNIFIED IDEOGRAPH-4E00'],
+		[0x4e01, 'CJK UNIFIED IDEOGRAPH-4E01'],
+		[0x9fa5, 'CJK UNIFIED IDEOGRAPH-9FA5'],
+		[0xf900, 'CJK COMPATIBILITY IDEOGRAPH-F900'],
+		[0xf901, 'CJK COMPATIBILITY IDEOGRAPH-F901'],
+		[0xfa2d, 'CJK COMPATIBILITY IDEOGRAPH-FA2D'],
+	]) {
+		t.assert.deepEqual(names[name]?.toArray(), [cp], name);
+	}
+	t.assert.equal(
+		Object.keys(names).filter((name) =>
+			name.startsWith('CJK UNIFIED IDEOGRAPH-'),
+		).length,
+		20902,
+	);
+	t.assert.equal(
+		Object.keys(names).filter((name) =>
+			name.startsWith('CJK COMPATIBILITY IDEOGRAPH-'),
+		).length,
+		302,
+	);
+	t.assert.equal(names['CJK UNIFIED IDEOGRAPH-9FA6'], undefined);
+	t.assert.equal(names['CJK COMPATIBILITY IDEOGRAPH-FA2E'], undefined);
+	t.assert.equal(names['<CJK IDEOGRAPH REPRESENTATIVE>'], undefined);
+});

tests/tests.mjs

@@ -3,6 +3,7 @@ import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { suite, test } from 'node:test';
 import './parsers.mjs';
+import './legacy-names.mjs';
 import './line-endings.mjs';
 import resources from '../data/resources.mjs';