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nv-facutil-f64

v1.0.21

Published

nv-facutil-f64 ======================= - this util is ONLY should be USED in repl OR compile-time script, coz its very slow - to test compile-time float validate in nvlang, normally USELESS(just use parseFloat) - nvlang NOT support runtime-float, ONLY

Downloads

36

Readme

nv-facutil-f64

  • this util is ONLY should be USED in repl OR compile-time script, coz its very slow
  • to test compile-time float validate in nvlang, normally USELESS(just use parseFloat)
  • nvlang NOT support runtime-float, ONLY support compile-time float

install

  • npm install nv-facutil-f64

usage

  const x   = require("nv-facutil-f64");

example

cls

   // view can be used to verify IF your double implement IS same as JS

	> var vw = x.creat_view(0.0)
	> vw
	View [0 : 0_00000000000_0000000000000000000000000000000000000000000000000000] {}
	> vw.f64_mant
	0n
	> vw.f64_mant = 1
	1
	> vw
	View [5e-324 : 0_00000000000_0000000000000000000000000000000000000000000000000001] {}
	> 
	> vw.f64_mant = 2
	2
	> vw
	View [1e-323 : 0_00000000000_0000000000000000000000000000000000000000000000000010] {}
	> 
	> vw.f64_mant = 3
	3
	> vw
	View [1.5e-323 : 0_00000000000_0000000000000000000000000000000000000000000000000011] {}
	> 
	> vw.f64_expo
	0
	> vw.f64_expo =1
	1
	> vw
	View [2.225073858507203e-308 : 0_00000000001_0000000000000000000000000000000000000000000000000011] {}
	> 
	> 
	> vw.u8a_rhex
	'0706050403020100'
	> vw.u8a_lhex
	'0001020304050607'
	> 

funcs

    > x.get_desc(3.1)
    {
      sign: 1n,
      bfr_dot: 3n,
      aft_dot: [ 225179981368525n, 2251799813685248n ]
    }
    > 

    >>> 225179981368525 / 2251799813685248
    0.10000000000000009
    >>> 



    > x.get_desc(Number.MIN_VALUE)
    {
      sign: 1n,
      bfr_dot: 0n,
      aft_dot: [
        1n,
        202402253307310618352495346718917307049556649764142118356901358027430339567995346891960383701437124495187077864316811911389808737385793476867013399940738509921517424276566361364466907742093216341239767678472745068562007483424692698618103355649159556340810056512358769552333414615230502532186327508646006263307707741093494784n
      ]
    }

    nv-facutil-f64# python3
    Python 3.6.9 (default, Nov 25 2022, 14:10:45) 
    [GCC 8.4.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> 1 / 202402253307310618352495346718917307049556649764142118356901358027430339567995346891960383701437124495187077864316811911389808737385793476867013399940738509921517424276566361364466907742093216341239767678472745068562007483424692698618103355649159556340810056512358769552333414615230502532186327508646006263307707741093494784
    5e-324
    >>> 


    > Number.MAX_VALUE
    1.7976931348623157e+308
    > x.get_desc(Number.MAX_VALUE)
    {
      sign: 1n,
      bfr_dot: 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368n,
      aft_dot: [ 0n, 1n ]
    }
    > '179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368'.length -1
    308
    > 


    > x.show_buf(5e-324)
    '0_00000000000_0000000000000000000000000000000000000000000000000001'
    > 
    > x.set_mantissa_at(5e-324,0,2)
    1e-323
    > 
    > x.show_buf(1e-323)
    '0_00000000000_0000000000000000000000000000000000000000000000000010'
    > x.set_mantissa_at(5e-324,0,255)
    1.26e-321
    > x.show_buf(1.26e-321)
    '0_00000000000_0000000000000000000000000000000000000000000011111111'
    > 



    > x.set_mantissa(5e-324,2n**52n-1n)
    2.225073858507201e-308
    >
    > x.show_buf(5e-324)
    '0_00000000000_0000000000000000000000000000000000000000000000000001'
    >
    > x.show_buf(2.225073858507201e-308)
    '0_00000000000_1111111111111111111111111111111111111111111111111111'
    >
    >

METHODS

View

	vw.ab                    vw.desc                  vw.dv                    vw.f32_0                 vw.f32_1
	vw.f32a                  vw.f64                   vw.f64_expo              vw.f64_mant              vw.f64_mant_0            vw.f64_mant_1
	vw.f64_mant_2            vw.f64_mant_3            vw.f64_mant_4            vw.f64_mant_5            vw.f64_mant_6            vw.f64_sign
	vw.f64_str               vw.f64a                  vw.get_f64_mant_at       vw.i16_0                 vw.i16_1                 vw.i16_2
	vw.i16_3                 vw.i16a                  vw.i32_0                 vw.i32_1                 vw.i32a                  vw.i64
	vw.i64a                  vw.i8_0                  vw.i8_1                  vw.i8_2                  vw.i8_3                  vw.i8_4
	vw.i8_5                  vw.i8_6                  vw.i8_7                  vw.i8a                   vw.negify_f64            vw.posify_f64
	vw.set_f64_mant_at       vw.u16_0                 vw.u16_1                 vw.u16_2                 vw.u16_3                 vw.u16a
	vw.u32_0                 vw.u32_1                 vw.u32a                  vw.u64                   vw.u64a                  vw.u8_0
	vw.u8_1                  vw.u8_2                  vw.u8_3                  vw.u8_4                  vw.u8_5                  vw.u8_6
	vw.u8_7                  vw.u8a                   vw.u8a_lhex              vw.u8a_rhex              vw.u8ca

APIS

            {
              from_buf: [Function: from_buf],
              get_buf: [Function: get_buf],
              _show_buf: [Function: _show_buf],
              show_buf: [Function: show_buf],
              _get_sign: [Function: _get_sign],
              get_sign: [Function: get_sign],
              _set_sign_to_pos: [Function: _set_sign_to_pos],
              _set_sign_to_neg: [Function: _set_sign_to_neg],
              set_sign_to_pos: [Function: set_sign_to_pos],
              set_sign_to_neg: [Function: set_sign_to_neg],
              _get_expo: [Function: _get_expo],
              get_expo: [Function: get_expo],
              _set_expo: [Function: _set_expo],
              set_expo: [Function: set_expo],
              _get_mantissa: [Function: _get_mantissa],
              get_mantissa: [Function: get_mantissa],
              _get_mantissa_at: [Function: _get_mantissa_at],
              get_mantissa_at: [Function: get_mantissa_at],
              _set_mantissa_at: [Function: _set_mantissa_at],
              set_mantissa_at: [Function: set_mantissa_at],
              _set_mantissa: [Function: _set_mantissa],
              set_mantissa: [Function: set_mantissa],
              HIDDEN_1_VAL: 4503599627370496n,
              DENOMINATOR_IF_EXPO_IS_ZERO: 202402253307310618352495346718917307049556649764142118356901358027430339567995346891960383701437124495187077864316811911389808737385793476867013399940738509921517424276566361364466907742093216341239767678472745068562007483424692698618103355649159556340810056512358769552333414615230502532186327508646006263307707741093494784n,
              _get_desc: [Function: _get_desc],
              get_desc: [Function: get_desc]
           

LICENSE

  • ISC