Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 | 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 100x 18x 100x 82x 82x 82x 82x 20x 20x 82x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 690x 690x 690x 690x 690x 690x 42x 42x 648x 690x 34x 34x 29x 29x 34x 690x 690x 3x 3x 616x 616x 616x 616x 690x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 464x 464x 464x 464x 464x 464x 20x 20x 444x 464x 33x 33x 29x 29x 33x 464x 464x 3x 3x 412x 412x 412x 412x 464x 35x 35x 35x 35x 35x 35x 35x 35x 4x 4x 35x 35x 35x 35x 35x 35x 35x 35x 2x 2x 35x 35x 35x 35x 35x 35x 35x 35x 2x 2x 35x 35x 35x 35x 35x 35x 35x 35x 2x 2x 35x 35x 35x 35x 35x 35x 35x 35x 7x 7x 35x 35x 35x 35x 35x 35x 35x 35x 35x 3x 3x 100x 4x 4x 4x 4x 4x | /**
* @license Apache-2.0
*
* Copyright (c) 2023 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
var setReadOnlyAccessor = require( '@stdlib/utils/define-nonenumerable-read-only-accessor' );
var setReadWriteAccessor = require( '@stdlib/utils/define-nonenumerable-read-write-accessor' );
var base = require( '@stdlib/random/base/mt19937' );
var ctors = require( '@stdlib/array/typed-real-ctors' );
var filledBy = require( '@stdlib/array/base/filled-by' );
var nullary = require( '@stdlib/strided/base/nullary' );
var format = require( '@stdlib/string/format' );
var defaults = require( './defaults.json' );
var validate = require( './validate.js' );
// MAIN //
/**
* Returns a function for creating arrays containing pseudorandom numbers generated using a 32-bit Mersenne Twister pseudorandom number generator.
*
* @param {Options} [options] - function options
* @param {PRNGSeedMT19937} [options.seed] - pseudorandom number generator seed
* @param {PRNGStateMT19937} [options.state] - pseudorandom number generator state
* @param {boolean} [options.copy=true] - boolean indicating whether to copy a provided pseudorandom number generator state
* @param {string} [options.idtype="float64"] - default data type when generating integers
* @param {string} [options.ndtype="float64"] - default data type when generating normalized numbers
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @throws {Error} must provide a valid state
* @returns {Function} function for creating arrays
*
* @example
* var mt19937 = factory();
* // returns <Function>
*
* var arr = mt19937( 10 );
* // returns <Float64Array>
*
* @example
* var mt19937 = factory();
* // returns <Function>
*
* var arr = mt19937( 10, {
* 'dtype': 'generic'
* });
* // returns [...]
*
* @example
* var mt19937 = factory();
* // returns <Function>
*
* var arr = mt19937.normalized( 10 );
* // returns <Float64Array>
*/
function factory() {
var options;
var nargs;
var opts;
var rand;
var prng;
var err;
opts = {
'idtype': defaults.idtype,
'ndtype': defaults.ndtype
};
nargs = arguments.length;
rand = mt19937;
if ( nargs === 0 ) {
prng = base;
} else if ( nargs === 1 ) {
options = arguments[ 0 ];
prng = base.factory( options );
err = validate( opts, options, 0 );
if ( err ) {
throw err;
}
}
setReadOnlyAccessor( rand, 'seed', getSeed );
setReadOnlyAccessor( rand, 'seedLength', getSeedLength );
setReadWriteAccessor( rand, 'state', getState, setState );
setReadOnlyAccessor( rand, 'stateLength', getStateLength );
setReadOnlyAccessor( rand, 'byteLength', getStateSize );
setReadOnly( rand, 'PRNG', prng );
setReadOnly( rand, 'normalized', normalized );
return rand;
/**
* Returns an array containing pseudorandom integers on the interval `[0, 4294967295]`.
*
* @private
* @param {NonNegativeInteger} len - array length
* @param {Options} [options] - function options
* @param {string} [options.dtype] - output array data type
* @throws {TypeError} first argument must be a nonnegative integer
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @returns {(Array|TypedArray)} output array
*/
function mt19937( len, options ) {
var ctor;
var out;
var err;
var dt;
var o;
if ( !isNonNegativeInteger( len ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a nonnegative integer. Value: `%s`.', len ) );
}
o = {};
if ( arguments.length > 1 ) {
err = validate( o, options, 1 );
if ( err ) {
throw err;
}
}
dt = o.dtype || opts.idtype;
if ( dt === 'generic' ) {
return filledBy( len, prng );
}
ctor = ctors( dt );
out = new ctor( len );
nullary( [ out ], [ len ], [ 1 ], prng );
return out;
}
/**
* Returns an array containing pseudorandom numbers on the interval `[0, 1)` with 53-bit precision.
*
* @private
* @param {NonNegativeInteger} len - array length
* @param {Options} [options] - function options
* @param {string} [options.dtype] - output array data type
* @throws {TypeError} first argument must be a nonnegative integer
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @returns {(Array|TypedArray)} output array
*/
function normalized( len, options ) {
var ctor;
var out;
var err;
var dt;
var o;
if ( !isNonNegativeInteger( len ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a nonnegative integer. Value: `%s`.', len ) );
}
o = {};
if ( arguments.length > 1 ) {
err = validate( o, options, 2 );
if ( err ) {
throw err;
}
}
dt = o.dtype || opts.ndtype;
if ( dt === 'generic' ) {
return filledBy( len, prng.normalized );
}
ctor = ctors( dt );
out = new ctor( len );
nullary( [ out ], [ len ], [ 1 ], prng.normalized );
return out;
}
/**
* Returns the PRNG seed.
*
* @private
* @returns {Uint32Array} seed
*/
function getSeed() {
return rand.PRNG.seed;
}
/**
* Returns the PRNG seed length.
*
* @private
* @returns {PositiveInteger} seed length
*/
function getSeedLength() {
return rand.PRNG.seedLength;
}
/**
* Returns the PRNG state length.
*
* @private
* @returns {PositiveInteger} state length
*/
function getStateLength() {
return rand.PRNG.stateLength;
}
/**
* Returns the PRNG state size (in bytes).
*
* @private
* @returns {PositiveInteger} state size (in bytes)
*/
function getStateSize() {
return rand.PRNG.byteLength;
}
/**
* Returns the current pseudorandom number generator state.
*
* @private
* @returns {Uint32Array} current state
*/
function getState() {
return rand.PRNG.state;
}
/**
* Sets the pseudorandom number generator state.
*
* @private
* @param {Uint32Array} s - generator state
* @throws {Error} must provide a valid state
*/
function setState( s ) {
rand.PRNG.state = s;
}
}
// EXPORTS //
module.exports = factory;
|