changes

node_modules/hash-index/index.js

@@ -0,0 +1,26 @@
+'use strict'
+
+var crypto = require('crypto')
+
+var isInt = function (n) {
+  return Number(n) === n && n % 1 === 0
+}
+
+var isValid = function (input) {
+  var type = typeof input
+  if (type === 'number' && isNaN(input)) return false
+  return type === 'number' || type === 'string' || Buffer.isBuffer(input)
+}
+
+var toNumber = function (buf) {
+  return buf.readUInt16BE(0) * 0xffffffff + buf.readUInt32BE(2)
+}
+
+module.exports = function (input, max) {
+  if (max === undefined) max = Infinity
+  if ((!isInt(max) && max !== Infinity) || max <= 0) throw new Error('max must be positive integer')
+  if (!isValid(input)) throw new Error('Input must be a string, buffer or a number')
+
+  if (typeof input === 'number') input = input.toString()
+  return toNumber(crypto.createHash('sha1').update(input).digest()) % max
+}