Wait, there's more, we can also adapt Re: Opposite of strtol? like this.
This goes to the file Tohex.xs:
MODULE = Math::Tohex PACKAGE = Math::Tohex
ST(0) = sv_newmortal();
mpz_init_set_str(big, num, 10);
Newx(out, 4 + mpz_sizeinbase(big, 16), char);
mpz_get_str(out, 16, big);
This goes to the file lib/Math/Tohex.pm:
our $VERSION = "1.00";
our @ISA = (Exporter::, DynaLoader::);
our @EXPORT = "tohex";
And this goes to Makefile.PL:
NAME => "Math::Tohex",
VERSION_FROM => "lib/Math/Tohex.pm",
LIBS => ["-lgmp"],
perl Makefile.PL && make
perl -wE 'use Math::BigInt; say Math::BigInt->new("4335043554366887798
and hope for no stupid mistakes leading to memory corruption.
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