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52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
6 years ago
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'use strict';
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const bitfield = require('sparse-bitfield');
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const codePoints = require('./lib/code-points');
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const unassigned_code_points = bitfield();
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const commonly_mapped_to_nothing = bitfield();
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const non_ascii_space_characters = bitfield();
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const prohibited_characters = bitfield();
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const bidirectional_r_al = bitfield();
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const bidirectional_l = bitfield();
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/**
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* Iterare over code points and
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* convert it into an buffer.
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* @param {bitfield} bits
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* @param {Array} src
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* @returns {Buffer}
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*/
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function traverse(bits, src) {
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for (const code of src.keys()) {
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bits.set(code, true);
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}
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const buffer = bits.toBuffer();
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return Buffer.concat([createSize(buffer), buffer]);
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}
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/**
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* @param {Buffer} buffer
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* @returns {Buffer}
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*/
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function createSize(buffer) {
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const buf = Buffer.alloc(4);
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buf.writeUInt32BE(buffer.length);
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return buf;
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}
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const memory = [];
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memory.push(
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traverse(unassigned_code_points, codePoints.unassigned_code_points),
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traverse(commonly_mapped_to_nothing, codePoints.commonly_mapped_to_nothing),
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traverse(non_ascii_space_characters, codePoints.non_ASCII_space_characters),
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traverse(prohibited_characters, codePoints.prohibited_characters),
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traverse(bidirectional_r_al, codePoints.bidirectional_r_al),
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traverse(bidirectional_l, codePoints.bidirectional_l)
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);
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process.stdout.write(Buffer.concat(memory));
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