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var util = require('util')

var errorMessages = {
  LIMIT_PART_COUNT: 'Too many parts',
  LIMIT_FILE_SIZE: 'File too large',
  LIMIT_FILE_COUNT: 'Too many files',
  LIMIT_FIELD_KEY: 'Field name too long',
  LIMIT_FIELD_VALUE: 'Field value too long',
  LIMIT_FIELD_COUNT: 'Too many fields',
  LIMIT_UNEXPECTED_FILE: 'Unexpected field',
  MISSING_FIELD_NAME: 'Field name missing'
}

function MulterError (code, field) {
  Error.captureStackTrace(this, this.constructor)
  this.name = this.constructor.name
  this.message = errorMessages[code]
  this.code = code
  if (field) this.field = field
}

util.inherits(MulterError, Error)

module.exports = MulterError