nd-bitset

v1.0.11

Published

a year ago

nd-bitset ======================= - simple wrap of std::bitset - only work in nodejs - must be 64 * Integer (IF <= 32, directly use a JS integer is BEST) - suitable for bigsize bit-pool (suggested is 1G)

Downloads

0High
0Medium
0Low

ihgazni2

nd-bitset

simple wrap of std::bitset
only work in nodejs
must be 64 * Integer (IF <= 32, directly use a JS integer is BEST)
suitable for bigsize bit-pool (suggested is 1G)

install

npm install nd-bitset

splitted

usage

  const x   = require("nd-bitset");

example

creat new

	> var bits = x.creat_bits_1g()
	> bits[99999] =true
	true
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: true,
	  are_all_fls: false,
	  are_all_tru: false,
	  count_of_0: 1073741823,
	  count_of_1: 1,
	  bit_capacity: 1073741824
	}
	> bits[99999]
	true
	> bits[1073741823] = true
	true
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: true,
	  are_all_fls: false,
	  are_all_tru: false,
	  count_of_0: 1073741822,
	  count_of_1: 2,
	  bit_capacity: 1073741824
	}
	> x.flip_all(bits)
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: true,
	  are_all_fls: false,
	  are_all_tru: false,
	  count_of_0: 2,
	  count_of_1: 1073741822,
	  bit_capacity: 1073741824
	}
	> x.free_bits(bits)              // must free. 

	/* if use it after free, will crash*/

creat on existing buffer

	> var ab = new ArrayBuffer(8)
	> ab
	ArrayBuffer {
	  [Uint8Contents]: <00 00 00 00 00 00 00 00>,
	  byteLength: 8
	}
	> var bits = x.creat_bits_64(ab)
	> ab
	ArrayBuffer {
	  [Uint8Contents]: <00 00 00 00 00 00 00 00>,
	  byteLength: 8
	}
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: false,
	  are_all_fls: true,
	  are_all_tru: false,
	  count_of_0: 64,
	  count_of_1: 0,
	  bit_capacity: 64
	}
	> bits[5] = true
	true
	> ab
	ArrayBuffer {
	  [Uint8Contents]: <20 00 00 00 00 00 00 00>,
	  byteLength: 8
	}
	> x.flip_all(bits)
	> ab
	ArrayBuffer {
	  [Uint8Contents]: <df ff ff ff ff ff ff ff>,
	  byteLength: 8
	}
	>

push /pop (as a circular buffer)

push_one: (bits, v=true)->Void

	> var bits = x.creat_bits_1g()
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: false,
	  are_all_fls: true,
	  are_all_tru: false,
	  count_of_0: 1073741824,
	  count_of_1: 0,
	  bit_capacity: 1073741824
	}
	> x.push_one(bits,1)
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: true,
	  are_all_fls: false,
	  are_all_tru: false,
	  count_of_0: 1073741823,
	  count_of_1: 1,
	  bit_capacity: 1073741824
	}
	> bits[1073741823]
	true
	> bits[1073741822]
	false
	>

pop_one: (bits)->boolean

	> var bits = x.creat_bits_64()
	> bits
	{
	  is_any_fls: true,
	  is_any_tru: false,
	  are_all_fls: true,
	  are_all_tru: false,
	  count_of_0: 64,
	  count_of_1: 0,
	  bit_capacity: 64
	}
	> x.show64(bits)
	[ '0000000000000000000000000000000000000000000000000000000000000000' ]
	> x.push_one(bits,1)
	> x.show64(bits)
	[ '1000000000000000000000000000000000000000000000000000000000000000' ]
	> bits[0]
	false
	> bits[63]
	true
	> x.push_one(bits,1)
	> x.show64(bits)
	[ '1100000000000000000000000000000000000000000000000000000000000000' ]
	// bit(63)  ...->                                               bit(0)
	> bits[63]
	true
	> bits[62]
	true
	> x.push_one(bits,1)
	> x.show64(bits)
	[ '1110000000000000000000000000000000000000000000000000000000000000' ]
	> x.pop_one(bits)
	true
	> x.show64(bits)
	[ '1100000000000000000000000000000000000000000000000000000000000000' ]
	> x.pop_one(bits)
	true
	> x.show64(bits)
	[ '1000000000000000000000000000000000000000000000000000000000000000' ]
	> x.pop_one(bits)
	true
	> x.show64(bits)
	[ '0000000000000000000000000000000000000000000000000000000000000000' ]
	> bits[0]=true
	true
	> x.show64(bits)
	[ '0000000000000000000000000000000000000000000000000000000000000001' ]
	> bits[1]=true
	true
	> x.show64(bits)
	[ '0000000000000000000000000000000000000000000000000000000000000011' ]
	> x.lshft_inplace(bits,2)
	> x.show64(bits)
	[ '0000000000000000000000000000000000000000000000000000000000001100' ]
	> x.rshft_inplace(bits,2)
	> x.show64(bits)
	[ '0000000000000000000000000000000000000000000000000000000000000011' ]
	>

    x.free_bits(bits)

call as function (range :64-bit-segment)

	// can call-as function  : (start-64bit-unit-idx, end-64bit-unit-idx, value)
	> bits(0,1,0b0000000000000000000000000000000000000000000000000000000000000000n)
	> x.show64(bits)
	[
	  '0000000000000000000000000000000000000000000000000000000000000000',
	  '1111111111111111111111111111111111111111111111111111111111111111'
	]
	> bits(0,1,3)
	> x.show64(bits)
	[
	  '0000000000000000000000000000000000000000000000000000000000000011',
	  '1111111111111111111111111111111111111111111111111111111111111111'
	]
	>

simple stringify (just for debug, its slow)

    (DO-NOT  use this on big-size-bits-larger-than-128M(such as 512M 1G),  its very slow, coz js-string is very slow)

	var bits = x.creat_bits_128();
	x.set_all_to_tru(bits)

	> var bits = x.creat_bits_128()
	> x.show64(bits)
	[
	  '0000000000000000000000000000000000000000000000000000000000000000',
	  '0000000000000000000000000000000000000000000000000000000000000000'
	]
	> x.set_all_to_tru(bits)
	> x.show64(bits)
	[
	  '1111111111111111111111111111111111111111111111111111111111111111',
	  '1111111111111111111111111111111111111111111111111111111111111111'
	]
	> 

    x.free_bits(bits)

		> var bits = x.creat_bits_128()
		> x.show64(bits)
		[
		  '0000000000000000000000000000000000000000000000000000000000000000',
		  '0000000000000000000000000000000000000000000000000000000000000000'
		]
		> bits[0]=1
		1
		> x.show64(bits)
		[
		  '0000000000000000000000000000000000000000000000000000000000000001',
		  '0000000000000000000000000000000000000000000000000000000000000000'
		]
		> bits[127]=1
		1
		> x.show64(bits)
		[
		  '0000000000000000000000000000000000000000000000000000000000000001',
		  '1000000000000000000000000000000000000000000000000000000000000000'
		]
		> x.free_bits(bits)

&= |= ^= inplace

	var bits0 = x.creat_bits_64()
	var bits1 = x.creat_bits_64()
	bits0[0]=1
	bits1[63]=1

	> x.show64(bits0)
	[ '0000000000000000000000000000000000000000000000000000000000000001' ]

	> x.show64(bits1)
	[ '1000000000000000000000000000000000000000000000000000000000000000' ]
	> 

	x.bor_inplace(bits0,bits1)  //   bits0 = bits0 | bits1

	> x.show64(bits0)
	[ '1000000000000000000000000000000000000000000000000000000000000001' ]
	> 
	> x.show64(bits1)
	[ '1000000000000000000000000000000000000000000000000000000000000000' ]
	>
	> x.bxor_inplace(bits1,bits0)
	> x.show64(bits1)
	[ '0000000000000000000000000000000000000000000000000000000000000001' ]
	> x.show64(bits0)
	[ '1000000000000000000000000000000000000000000000000000000000000001' ]
	>

& | ^ NOT-inplace, will creat new

		> var bits0 = x.creat_bits_64();
		> var bits1 = x.creat_bits_64();

		> bits0
		{
		  is_any_fls: true,
		  is_any_tru: false,
		  are_all_fls: true,
		  are_all_tru: false,
		  count_of_0: 64,
		  count_of_1: 0,
		  bit_capacity: 64
		}
		> x.flip_all(bits1)
		> x.show64(bits0)
		[ '0000000000000000000000000000000000000000000000000000000000000000' ]
		> x.show64(bits1)
		[ '1111111111111111111111111111111111111111111111111111111111111111' ]
		> var bits2 = x.bor(bits0,bits1)
		> bits2
		{
		  is_any_fls: false,
		  is_any_tru: true,
		  are_all_fls: false,
		  are_all_tru: true,
		  count_of_0: 0,
		  count_of_1: 64,
		  bit_capacity: 64
		}
		> x.show64(bits2)
		[ '1111111111111111111111111111111111111111111111111111111111111111' ]
		> bits0[25] = 1
		1
		> x.show64(bits2)
		[ '1111111111111111111111111111111111111111111111111111111111111111' ]
		> x.show64(bits0)
		[ '0000000000000000000000000000000000000010000000000000000000000000' ]
		> x.show64(bits1)
		[ '1111111111111111111111111111111111111111111111111111111111111111' ]
		> bits1[26] = 1
		1
		> x.show64(bits1)
		[ '1111111111111111111111111111111111111111111111111111111111111111' ]
		> bits1[26] = 0
		0
		> x.show64(bits1)
		[ '1111111111111111111111111111111111111011111111111111111111111111' ]
		> x.show64(bits2)
		[ '1111111111111111111111111111111111111111111111111111111111111111' ]
		>

METHODS

APIS

		{
		  creat_bits_64: [Function (anonymous)],
		  creat_bits_128: [Function (anonymous)],
		  creat_bits_256: [Function (anonymous)],
		  creat_bits_512: [Function (anonymous)],
		  creat_bits_1k: [Function (anonymous)],
		  creat_bits_2k: [Function (anonymous)],
		  creat_bits_4k: [Function (anonymous)],
		  creat_bits_8k: [Function (anonymous)],
		  creat_bits_16k: [Function (anonymous)],
		  creat_bits_32k: [Function (anonymous)],
		  creat_bits_64k: [Function (anonymous)],
		  creat_bits_128k: [Function (anonymous)],
		  creat_bits_256k: [Function (anonymous)],
		  creat_bits_512k: [Function (anonymous)],
		  creat_bits_1m: [Function (anonymous)],
		  creat_bits_2m: [Function (anonymous)],
		  creat_bits_4m: [Function (anonymous)],
		  creat_bits_8m: [Function (anonymous)],
		  creat_bits_16m: [Function (anonymous)],
		  creat_bits_32m: [Function (anonymous)],
		  creat_bits_64m: [Function (anonymous)],
		  creat_bits_128m: [Function (anonymous)],
		  creat_bits_256m: [Function (anonymous)],
		  creat_bits_512m: [Function (anonymous)],
		  creat_bits_1g: [Function (anonymous)],
		  creat_bits_2g: [Function (anonymous)],
		  creat_bits_4g: [Function (anonymous)],
		  creat_bits_8g: [Function (anonymous)],
		  creat_bits_16g: [Function (anonymous)],
		  creat_bits_32g: [Function (anonymous)],
		  creat_bits_64g: [Function (anonymous)],
		  creat_bits_128g: [Function (anonymous)],


		      set_all_to_tru: [Function (anonymous)],
		      set_all_to_fls: [Function (anonymous)],
		      flip_all: [Function (anonymous)],
		      clone: [Function (anonymous)],


		  free_bits: [Function (anonymous)]
		}

Published

Vulnerabilities

Links

Maintainers

Keywords

Readme

nd-bitset

install

splitted

usage

example

creat new

creat on existing buffer

push /pop (as a circular buffer)

push_one: (bits, v=true)->Void

pop_one: (bits)->boolean

call as function (range :64-bit-segment)

simple stringify (just for debug, its slow)

&= |= ^= inplace

& | ^ NOT-inplace, will creat new

METHODS

APIS

LICENSE