Function strEscape

python/pythonmonkey/builtin_modules/util.js:172–207

(str)

// Escape control characters, single quotes and the backslash.
// This is similar to JSON stringify escaping.
function strEscape(str) 
{
  // Some magic numbers that worked out fine while benchmarking with v8 6.0
  if (str.length < 5000 && !strEscapeSequencesRegExp.test(str))
    return `'${str}'`;
  if (str.length > 100)
    return `'${str.replace(strEscapeSequencesReplacer, escapeFn)}'`;
  let result = '';
  let last = 0;
  let i;
  for (i = 0; i < str.length; i++) 
  {
    const point = str.charCodeAt(i);
    if (point === 39 || point === 92 || point < 32) 
    {
      if (last === i) 
      {
        result += meta[point];
      }
      else 
      {
        result += `${str.slice(last, i)}${meta[point]}`;
      }
      last = i + 1;
    }
  }
  if (last === 0) 
  {
    result = str;
  }
  else if (last !== i) 
  {
    result += str.slice(last);
  }
  return `'${result}'`;
}

function tryStringify(arg) 
{