*vital-data-bignum.txt*		Multi precision integer library.

Maintainer: aomoriringo <sel0433 at gmail com>

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CONTENTS				*Vital.Data.BigNum-contents*

INTRODUCTION			|Vital.Data.BigNum-introduction|
INTERFACE			|Vital.Data.BigNum-interface|
  Functions			|Vital.Data.BigNum-functions|

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INTRODUCTION				*Vital.Data.BigNum-introduction*

*Vital.Data.BigNum* is a multi precision integer library.
It provides some functions to manipulate multi precision integer.

>
	let s:V = vital#of("vital")
	let s:BigNum = s:V.import("Data.BigNum")

	let x = s:BigNum.from_num(42)
	let y = s:BigNum.from_string("12345678901")
	let z = s:BigNum.add(x, y)
	echo s:BigNum.to_string(z)
	" 12345678943
	let z = s:BigNum.mul(y, 9753)
	echo s:BigNum.to_string(z)
	" 120407406321453

	let [div, mod] = s:BigNum.div_mod(y, "112233")
	echo s:BigNum.to_string(div)
	" 110000
	echo s:BigNum.to_string(mod)
	" 48901
<

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INTERFACE				*Vital.Data.BigNum-interface*
------------------------------------------------------------------------------
FUNCTIONS				*Vital.Data.BigNum-functions*

from_num({number})			*Vital.Data.BigNum.from_num()*
	Return a new 'BigNum' object from {number}.

from_string({str})			*Vital.Data.BigNum.from_string()*
	Return a new 'BigNum' object from {str}.

to_string({bignum})			*Vital.Data.BigNum.to_string()*
	Return a string from {bignum}.

compare({elem1}, {elem2})		*Vital.Data.BigNum.compare()*
	Compares as signed integer.  Returns -1, 0, or 1.

add({elem1}, {elem2})			*Vital.Data.BigNum.add()*
	Return {elem1} + {elem2}, for {elem1} and {elem2} Number, String or
	BigNum.

sub({elem1}, {elem2})			*Vital.Data.BigNum.sub()*
	Return {elem1} - {elem2}.

mul({elem1}, {elem2})			*Vital.Data.BigNum.mul()*
	Return {elem1} * {elem2}.

div({elem1}, {elem2})			*Vital.Data.BigNum.div()*
	Return {elem1} / {elem2}.

mod({elem1}, {elem2})			*Vital.Data.BigNum.mod()*
	Return {elem1} % {elem2}.

div_mod({elem1}, {elem2})		*Vital.Data.BigNum.divmod()*
	Return [Div(), Mod()].

sign({elem})				*Vital.Data.BigNum.sign()*
	Return sign of {elem} as -1, 0, or 1.

neg({elem})				*Vital.Data.BigNum.neg()*
	Return {elem} negated (-{elem}).

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vim:tw=78:fo=tcq2mM:ts=8:ft=help:norl