38 lines
939 B
TypeScript
38 lines
939 B
TypeScript
import { join } from "path";
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import {mkdirSync, writeFileSync} from 'fs';
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export const RUST_OUT_DIR = join(__dirname, '..', 'src', 'gen');
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try {
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mkdirSync(RUST_OUT_DIR);
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} catch (err) {
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if (err.code !== 'EEXIST') {
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throw err;
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}
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}
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writeFileSync(join(RUST_OUT_DIR, 'mod.rs'), `
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pub mod attrs;
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pub mod dfa;
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pub mod entities;
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pub mod patterns;
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`);
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export const DATA_DIR = join(__dirname, 'data');
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export const leftPad = (str: string, n: number) => '0'.repeat(n - str.length) + str;
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export const prettyJson = (v: any) => JSON.stringify(v, null, 2);
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export const byteStringLiteral = (bytes: number[]): string => 'b"' + bytes.map(c => {
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if (c > 255) throw new Error('Not a byte');
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// 0x20 == ' '.
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// 0x7E == '~'.
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// 0x5C == '\\'.
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// 0x22 == '"'.
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if (c >= 0x20 && c <= 0x7E && c != 0x5C && c != 0x22) {
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return String.fromCharCode(c);
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} else {
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return `\\x${leftPad(c.toString(16), 2)}`;
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}
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}).join('') + '"';
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