libbf.js

Arbitrary precision floating point number library. Libbf emscriptened.

• Arbitrary precision floating point number library for browsers
• Port LibBF Library from Fabrice Bellard to the browser envirenment by emscripten.
• Better performance js bigfloat libraries with precision.
• Not carefully tested.

Usage

constructor

var num=bfjs.bf(a : number or string)

Math functions

add
sub
mul
div
mod
rem
or
xor
and
sqrt
fpround
round
trunc
floor
ceil
neg
abs
sign
LOG2
PI
MIN_VALUE
MAX_VALUE
EPSILON
exp
log
pow
cos
sin
tan
atan
atan2
asin
acos
is_finit
is_nan
is_zero
copy
clone
fromNumber
toNumber
f64
cmp

script

<script src="libbf.js"></script>
<script src="bf.js"></script>

Demo

Try it here!

https://kikoqiu.github.io/jslab/jslab.html

Envirenment

• Runs in a browser
• The WASM code loading requires an http server to work

MIT license.

Loot at https://bellard.org/libbf/ for more information.

Add Romberg Integration Support

Calc definite integral of 4/(1+x^2) from 0 to 1 (Should be PI)

info={}
rst=bfjs.helper.romberg(
  (x)=>bfjs.bf(4).div(x.mul(x).add(1)),
  0,1,1e-40,1e-40,info);
console.log(info+'')

See bf.html for demo.