| Portability | portable |
|---|---|
| Stability | experimental |
| Maintainer | dominic.steinitz@blueyonder.co.uk |
Codec.Utils
Description
Utilities for coding and decoding.
- type Octet = Word8
- msb :: Int
- fromTwosComp :: Integral a => [Octet] -> a
- toTwosComp :: Integral a => a -> [Octet]
- toOctets :: (Integral a, Integral b) => a -> b -> [Octet]
- fromOctets :: (Integral a, Integral b) => a -> [Octet] -> b
- listFromOctets :: (Integral a, Bits a) => [Octet] -> [a]
- listToOctets :: (Bits a, Integral a) => [a] -> [Octet]
- i2osp :: Integral a => Int -> a -> [Octet]
Types and Constants
type Octet = Word8
The basic type for encoding and decoding.
Octet Conversion Functions
fromTwosComp :: Integral a => [Octet] -> a
Convert from twos complement.
toTwosComp :: Integral a => a -> [Octet]
toOctets :: (Integral a, Integral b) => a -> b -> [Octet]
Take a number a convert it to base n as a list of octets.
fromOctets :: (Integral a, Integral b) => a -> [Octet] -> b
Take a list of octets (a number expressed in base n) and convert it to a number.
listFromOctets :: (Integral a, Bits a) => [Octet] -> [a]
See listToOctets.
listToOctets :: (Bits a, Integral a) => [a] -> [Octet]
Converts a list of numbers into a list of octets.
The resultant list has nulls trimmed from the end to make this the dual
of listFromOctets (except when the original octet list ended with nulls;
see trimNulls).
i2osp :: Integral a => Int -> a -> [Octet]
Take the length of the required number of octets and convert the number to base 256 padding it out to the required length. If the required length is less than the number of octets of the converted number then return the converted number. NB this is different from the standard ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf but mimics how replicate behaves.