util.md

Util

A simple utility library.

Methods

• arrayEqual
• binToHex
• copyIndexLen
• crc16
• fromTwosComplement
• hexToBin
• htonl
• htons
• reverse

---

arrayEqual(a,b)

compare two arrays

• a

  type: array

  a

• b

  type: array

  b

Returns: boolean

binToHex(bin)

convert a plain buffer to a hex string

• bin

  type: plainbuffer

  binary buffer

Returns: string

copyIndexLen(number,number,number,number,number)

copy len bytes from src at src index to dst at dst index

• number

  type: array

  src

• number

  type: int

  src index

• number

  type: array

  dst

• number

  type: int

  dst index

• number

  type: int

  len

Returns:

crc16(buf)

calculate crc16 of the buffer

• buf

  type: bytearray

  buffer

Returns: uint16

fromTwosComplement(twosComplement,numberBytes)

convert twos complement to int

• twosComplement

  type: bytearray

  twos complement

• numberBytes

  type: int

  number of bytes in towsComplement

Returns: int

hexToBin(hex)

convert hex string to a plain buffer

• hex

  type: string

  hex string

Returns: plain buffer

htonl(number)

convert host to network byte order (uint32)

• number

  type: uint32

  uint32

Returns: uint32

htons(number)

convert host to network byte order (uint16)

• number

  type: uint16

  uint16

Returns: uint16

reverse(bin)

reverse the bytes in a plain buffer

• bin

  type: plainbuffer

  binary buffer

Returns: plain buffer