29 lines
1.1 KiB
TypeScript
29 lines
1.1 KiB
TypeScript
import {readFileSync, writeFileSync} from 'fs';
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import {join} from 'path';
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import {byteStringLiteral, DATA_DIR, RUST_OUT_DIR} from './_common';
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import {parsePattern, TrieBuilder} from './trie';
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const entities: {[name: string]: {codepoints: number[]; characters: string;}} = JSON.parse(readFileSync(join(DATA_DIR, 'entities.json'), 'utf8'));
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const trieBuilder = new TrieBuilder('ENTITY', "EntityType");
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trieBuilder.addPattern(parsePattern("&#[0-9]"), 'EntityType::Dec');
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trieBuilder.addPattern(parsePattern("&#x[0-9a-fA-F]"), 'EntityType::Hex');
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for (const [rep, entity] of Object.entries(entities)) {
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const bytes = Buffer.from(entity.characters, 'utf8');
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// Since we're minifying in place, we need to guarantee we'll never write something longer than source.
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const val = byteStringLiteral(rep.length < bytes.length ? [...rep].map(c => c.charCodeAt(0)) : [...bytes]);
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trieBuilder.add(rep, `EntityType::Named(${val})`);
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}
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const output = `
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#[derive(Clone, Copy)]
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pub enum EntityType {
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Named(&'static [u8]),
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Dec,
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Hex,
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}
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${trieBuilder.generate()}
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`;
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writeFileSync(join(RUST_OUT_DIR, 'entities.rs'), output);
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