Acme.BookStore.HttpApi.Host/node_modules/parse-json/vendor/parse.js

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/*
 * Author: Alex Kocharin <alex@kocharin.ru>
 * GIT: https://github.com/rlidwka/jju
 * License: WTFPL, grab your copy here: http://www.wtfpl.net/txt/copying/
 */

// RTFM: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf

var Uni = require('./unicode')

function isHexDigit(x) {
  return (x >= '0' && x <= '9')
      || (x >= 'A' && x <= 'F')
      || (x >= 'a' && x <= 'f')
}

function isOctDigit(x) {
  return x >= '0' && x <= '7'
}

function isDecDigit(x) {
  return x >= '0' && x <= '9'
}

var unescapeMap = {
  '\'': '\'',
  '"' : '"',
  '\\': '\\',
  'b' : '\b',
  'f' : '\f',
  'n' : '\n',
  'r' : '\r',
  't' : '\t',
  'v' : '\v',
  '/' : '/',
}

function formatError(input, msg, position, lineno, column, json5) {
  var result = msg + ' at ' + (lineno + 1) + ':' + (column + 1)
    , tmppos = position - column - 1
    , srcline = ''
    , underline = ''

  var isLineTerminator = json5 ? Uni.isLineTerminator : Uni.isLineTerminatorJSON

  // output no more than 70 characters before the wrong ones
  if (tmppos < position - 70) {
    tmppos = position - 70
  }

  while (1) {
    var chr = input[++tmppos]

    if (isLineTerminator(chr) || tmppos === input.length) {
      if (position >= tmppos) {
        // ending line error, so show it after the last char
        underline += '^'
      }
      break
    }