buffer-write

Write to a buffer without maintaining an offset or knowing its length.

• This module tries to mirror Buffer methods for simplicity.
• Supports writing 64-bit values at 52-bit precision (JavaScript safe integer maximum).

Install

npm install buffer-write

Usage

var Writer = require('buffer-write');
 
// Normal method
var writer = new Writer()
writer.write('a')
writer.fill(1, 3)
writer.writeInt8(0x72)
writer.toBuffer(); // <Buffer 61 01 01 01 72>
 
// Chain method
Writer()
  .writeUInt16BE(0x7623)
  .write(new Buffer([1, 2, 3, 4]), 2)
  .writeUInt16LE(0x1800)
  .toBuffer(); // <Buffer 76 23 01 02 00 18>

API

NOTE: There is no concept of offset when using this module as values are effectively appended to each other.

write[U]Int8(value), write[U]{16,32,64}{BE,LE}(value)

Write an integer of the specified size and endian format. A RangeError will be thrown for any out of range values. 64-bit integer methods will only accept 52-bit integer values.

writeFloat{BE,LE}(value), writeDouble{BE,LE}(value)

Write a floating point number of the specified size and endian format.

write(string, [length], [encoding])

Write a string of specified length and encoding.

write(buffer, [start], [end])

Write a buffer or part of a buffer.

fill(value, length)

Fill with length repetitions of the specified value.

length

The number of bytes currently written.

copy(targetBuffer, [targetStart], [sourceStart], [sourceEnd])

Write our values into an existing buffer.

toBuffer()

Create a new buffer and write our values.

License

MIT