'use strict';

var ver6 = parseInt(process.versions.node) >= 6;

module.exports = {
  create: function (arg0, encoding) {
    if (typeof arg0 === 'number') {
      return ver6 ? Buffer.alloc(arg0) : new Buffer(arg0);
    }
    return ver6 ? Buffer.from(arg0, encoding) : new Buffer(arg0, encoding);
  },

  read: {
    fixedLenUtf8String: function (buffer, start, length) {
      return buffer.toString('utf8', start, start + length).trim();
    },
    fixedLenHexString: function (buffer, start, length) {
      return buffer.toString('hex', start, start + length).toUpperCase();
    },
    uintBigEndian: function (buffer, start, length) {
      return buffer.readUIntBE(start, length);
    }
  },

  write: {
    variableLenUtf8String: function (buffer, value, start, length) {
      while (value.length !== length) {
        value += ' ';
      }
      buffer.write(value, start, length, 'utf8');
    },
    fixedLenHexString: function (buffer, value, start, length) {
      buffer.write(value, start, length, 'hex');
    },
    uintBigEndian: function (buffer, value, start, length) {
      buffer.writeUIntBE(value, start, length);
    }
  }
};