clever-buffer
Advanced tools
Buffer write and read utilities.
CleverBuffer adds functionality that is missing from the node Buffer class
npm install clever-buffer
NOTE: Examples below in coffeescript
{ CleverBufferReader } = require 'clever-buffer'
Allocates a new CleverBufferReader with an internal buffer of the specified existingBuffer
reader = new CleverBufferReader existingBuffer, {offset:0, noAssert: true, bigEndian: false}
Returns an Unsigned 8bit Integer from the current offset
buf = new Buffer [0xFF, 0x02]
reader = new CleverBufferReader buf
console.log reader.getUInt8() # 255
console.log reader.getUInt8() # 2
Returns a Signed 8bit Integer from the current offset
buf = new Buffer [0xFF, 0x02]
reader = new CleverBufferReader buf
console.log reader.getInt8() # -1
console.log reader.getInt8() # 2
Returns an Unsigned 16bit Integer from the current offset.
buf = new Buffer [0xFF, 0xFF, 0x02, 0x00]
reader = new CleverBufferReader buf
console.log reader.getUInt16() # 65535
console.log reader.getUInt16() # 2
Returns a Signed 16bit Integer from the current offset
buf = new Buffer [0xFF, 0xFF, 0x02, 0x00]
reader = new CleverBufferReader buf
console.log reader.getInt16() # -1
console.log reader.getInt16() # 2
Returns an Unsigned 32bit Integer from the current offset.
buf = new Buffer [0xFF, 0xFF, 0xFF, 0xFF]
reader = new CleverBufferReader buf
console.log reader.getUInt32() # 4294967295
Returns a Signed 32bit Integer from the current offset
buf = new Buffer [0xFF, 0xFF, 0xFF, 0xFF]
reader = new CleverBufferReader buf
console.log reader.getInt32() # -1
Returns an Unsigned 64bit Integer from the current offset.
The value will be returned as a string
buf = new Buffer [0xFF, 0xFF, 0xFF, 0xFF,0xFF, 0xFF, 0xFF, 0xFF]
reader = new CleverBufferReader buf
console.log reader.getUInt64() # "18446744073709551615"
Returns a Signed 64bit Integer from the current offset
The value will be returned as a string
buf = new Buffer [0xFF, 0xFF, 0xFF, 0xFF,0xFF, 0xFF, 0xFF, 0xFF]
reader = new CleverBufferReader buf
console.log reader.getInt64() # "-1"
Returns utf-8 encoded string of specified length
buf = new Buffer [0x48, 0x45, 0x4C, 0x4C, 0x4F]
reader = new CleverBufferReader buf
console.log reader.getString(length:5) # "HELLO"
{ CleverBufferWriter } = require 'clever-buffer'
Allocates a new CleverBufferWriter with an internal buffer of the specified existingBuffer
writer = new CleverBufferWriter existingBuffer, {offset:0, noAssert: true, bigEndian: false}
Writes an Unsigned 8bit Integer to the specified/current offset
buf = new Buffer 2
writer = new CleverBufferWriter buf
writer.writeUInt8 255
writer.writeUInt8 2
console.log buf # [0xFF, 0x02]
Writes an signed 8bit Integer to the specified/current offset
buf = new Buffer 2
writer = new CleverBufferWriter buf
writer.writeInt8 -1
writer.writeInt8 2
console.log buf # [0xFF, 0x02]
Writes an Unsigned 16bit Integer to the specified/current offset
buf = new Buffer 4
writer = new CleverBufferWriter buf
writer.writeUInt16 65535
writer.writeUInt16 2
console.log buf # [0xFF, 0xFF, 0x02, 0x00]
Writes an Signed 16bit Integer to the specified/current offset
buf = new Buffer 4
writer = new CleverBufferWriter buf
writer.writeInt16 -1
writer.writeInt16 2
console.log buf # [0xFF, 0xFF, 0x02, 0x00]
Writes an Unsigned 32bit Integer to the specified/current offset
buf = new Buffer 4
writer = new CleverBufferWriter buf
writer.writeUInt32 4294967295
console.log buf # [0xFF, 0xFF, 0xFF, 0xFF]
Writes an signed 32bit Integer to the specified/current offset
buf = new Buffer 4
writer = new CleverBufferWriter buf
writer.writeInt32 -1
console.log buf # [0xFF, 0xFF, 0xFF, 0xFF]
Writes string to the buffer
buf = new Buffer 5
writer = new CleverBufferWriter buf
writer.writeString "HELLO"
console.log buf # [0x48, 0x45, 0x4C, 0x4C, 0x4F]
The following is common to CleverBufferReader and CleverBufferWriter (The examples only show reader)
Gets the current offset of the buffer
buf = new Buffer [0xFF, 0x02]
reader = new CleverBufferReader buf
console.log reader.getOffset() # 0
reader.getUInt8()
console.log reader.getOffset() # 1
reader.getUInt8()
console.log reader.getOffset() # 2
Skips the current offset forward the specified bytes amount
buf = new Buffer [0xFF, 0x02]
reader = new CleverBufferReader buf
console.log reader.getOffset() # 0
reader.skip 2
console.log reader.getOffset() # 2
Skips to the specified offset
buf = new Buffer [0xFF, 0xFF, 0xFF, 0x01]
reader = new CleverBufferReader buf
console.log reader.getOffset() # 0
reader.skipTo 3
console.log reader.getOffset() # 3
Will return the underlying buffer so you can perform actions directly on it
buf = new Buffer [0xFF, 0x02]
reader = new CleverBufferReader buf
console.log reader.getBuffer()[1] # 2
Will return a buffer slice from the start of the buffer to the current offset
buf = new Buffer [0xFF, 0x02]
reader = new CleverBufferReader buf
reader.getUInt8()
console.log reader.trim() # [0xFF]
console.log buf # [0xFF, 0x02]
npm test
FAQs
Buffer utilities
We found that clever-buffer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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