Generate Font Awesome icon name + code definition for C language

fa2icon.js

#!/usr/bin/env node
//
// Generate FontAwesome icon definitions
//

var http = require('http');

http.get('http://fontawesome.io/cheatsheet/', function (result) {
  var body = '';
  result.on('data', function (chunk) { body += chunk; });
  result.on('end', function () { parse(body); });
});

function parse(body) {
  var strs = body.match(/fa[-a-z]+\n.*\n.*span>$/mg);
  if (!strs)
    return;
  for (var i = 0; i < strs.length; i++) {
    var str = strs[i];
    str = str.replace(/\s+/g, ' ')
          .replace('[&amp;', '&')
          .replace(';]', ';')
          .replace('(alias)', '')
          .replace('<span class="muted">', '')
          .replace('<span class="text-muted">', '')
          .replace(/<\/span>/g, '')
          .replace(/-/g, '_')
          .replace(/(fa[_a-z]+)/g, function (v) { return v.toUpperCase(); })
          .replace('FA_', '#define FA_ICON_')
          .replace(/&#x([a-z0-9]+);/g, function(v, v1) {
            var utf16Code = parseInt(v1, 16);
            var utf8CStr = toCStringUTF8(String.fromCharCode(utf16Code));
            return '"' + utf8CStr + '" /* ' + v + ' */';
          })
          .replace(/\s+/g, ' ');
    console.log(str);
  }
}

function toCStringUTF8(str) {
  var utf8 = [];
  var i;
  for (i = 0; i < str.length; i++) {
    var charcode = str.charCodeAt(i);
    if (charcode < 0x80) utf8.push(charcode);
    else if (charcode < 0x800) {
      utf8.push(0xc0 | (charcode >> 6),
                0x80 | (charcode & 0x3f));
    }
    else if (charcode < 0xd800 || charcode >= 0xe000) {
      utf8.push(0xe0 | (charcode >> 12),
                0x80 | ((charcode>>6) & 0x3f),
                0x80 | (charcode & 0x3f));
    }
    // surrogate pair
    else {
      i++;
      // UTF-16 encodes 0x10000-0x10FFFF by
      // subtracting 0x10000 and splitting the
      // 20 bits of 0x0-0xFFFFF into two halves
      charcode = 0x10000 + (((charcode & 0x3ff)<<10)
                  | (str.charCodeAt(i) & 0x3ff));
      utf8.push(0xf0 | (charcode >>18),
                0x80 | ((charcode>>12) & 0x3f),
                0x80 | ((charcode>>6) & 0x3f),
                0x80 | (charcode & 0x3f));
    }
  }
  for (i = 0; i < utf8.length; i++)
    utf8[i] = '\\x' + decimalToHex(utf8[i], 2);
  return utf8.join('');
}

function decimalToHex(d, padding) {
    var hex = Number(d).toString(16);
    padding = typeof (padding) === "undefined" || padding === null ? padding = 2 : padding;

    while (hex.length < padding) {
        hex = "0" + hex;
    }

    return hex;
}