ethers.js/tests/wordlist-generation/analyse-ja.js
2018-06-21 18:03:29 -04:00

64 lines
1.6 KiB
JavaScript

/**
* There are only 54 kana used, which can be encoded in the printable range A-Z a-z.
* The list is also fairly sorted (with only a few UTF-8 gotchas), so we can groupt
* words together by length, eliminating the need for separators.
*/
var fs = require('fs')
var ethers = require('../src')
var words = fs.readFileSync('lang-ja.txt').toString().split('\x0a')
var output = [ '', '', '', '', '', '', '' ];
var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
var nextCode = 0;
var mapping = { };
var reverseMap = {};
words.forEach((word, index) => {
if (word.length === 0) { return; }
for (var i = 0; i < word.length; i++) {
var b = ethers.utils.toUtf8Bytes(word[i]);
var v = ((b[1] === 129) ? 0: 0x40) | (b[2] - 128);
if (!mapping[v]) {
mapping[v] = code[nextCode++];
reverseMap[mapping[v]] = v;
}
output[word.length - 3] += mapping[v];
}
});
console.log('Data:', output);
(function(mapping) {
var m = [];
while (m.length < 92) { m.push('~'); }
for (var key in mapping) {
m[mapping[key]] = key;
}
console.log('Map:', m.join(''));
})(reverseMap);
// Check the wordlist matches the official wordlist.
(function() {
var lang = require('../src/wordlists/lang-ja.js').langJa;
// Check against our final implementation
var count = 0;
words.forEach((word, index) => {
if (!word) { return; }
if (word !== lang.getWord(index)) {
console.log(word, lang.getWord(index));
count++;
}
});
console.log('Bad:', count);
})()