Functions for BIGNUM representation of arbitrarily precise integers

as.BIGNUMint encodes integer in BIGNUM format as raw vector as used by ASN.1 format.

as.BIGNUMint(what, scalar = TRUE)

Arguments

what

representation of an integer or a vector thereof. Currently supported formats include "bigz" objects from the "gmp" package, integers and reals.

scalar

if TRUE then the input is expected to be scalar and only the first element will be used (zero-length vectors raise an error). Otherwise the result will be a list of all converted elements.

Details

The BIGNUM representation as used in ASN.1 is a big-endian encoding of variable length stored in a raw vector. Negative numbers are stored in two-complement's encoding, but are currently unsupported by as.BIGNUMint.

Value

Raw vector in BIGNUM integer representation.

Author

Simon Urbanek

Note

Unless the input is of class "bigz" then 32-bit platforms only support integers up to 32-bit, 64-bit platforms up to 53-bit (when real vectors are used).

Examples

as.BIGNUMint(65537)
#> [1] 01 00 01