xorshift7.js.html (14351B)
1 <!doctype html> 2 <html lang="en"> 3 <head> 4 <title>Code coverage report for seedrandom/lib/xorshift7.js</title> 5 <meta charset="utf-8" /> 6 <link rel="stylesheet" href="../../prettify.css" /> 7 <link rel="stylesheet" href="../../base.css" /> 8 <meta name="viewport" content="width=device-width, initial-scale=1"> 9 <style type='text/css'> 10 .coverage-summary .sorter { 11 background-image: url(../../sort-arrow-sprite.png); 12 } 13 </style> 14 </head> 15 <body> 16 <div class='wrapper'> 17 <div class='pad1'> 18 <h1> 19 <a href="../../index.html">All files</a> / <a href="index.html">seedrandom/lib</a> xorshift7.js 20 </h1> 21 <div class='clearfix'> 22 <div class='fl pad1y space-right2'> 23 <span class="strong">92.42% </span> 24 <span class="quiet">Statements</span> 25 <span class='fraction'>61/66</span> 26 </div> 27 <div class='fl pad1y space-right2'> 28 <span class="strong">73.08% </span> 29 <span class="quiet">Branches</span> 30 <span class='fraction'>19/26</span> 31 </div> 32 <div class='fl pad1y space-right2'> 33 <span class="strong">90% </span> 34 <span class="quiet">Functions</span> 35 <span class='fraction'>9/10</span> 36 </div> 37 <div class='fl pad1y space-right2'> 38 <span class="strong">94% </span> 39 <span class="quiet">Lines</span> 40 <span class='fraction'>47/50</span> 41 </div> 42 </div> 43 <p class="quiet"> 44 Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block. 45 </p> 46 </div> 47 <div class='status-line high'></div> 48 <pre><table class="coverage"> 49 <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> 50 <a name='L2'></a><a href='#L2'>2</a> 51 <a name='L3'></a><a href='#L3'>3</a> 52 <a name='L4'></a><a href='#L4'>4</a> 53 <a name='L5'></a><a href='#L5'>5</a> 54 <a name='L6'></a><a href='#L6'>6</a> 55 <a name='L7'></a><a href='#L7'>7</a> 56 <a name='L8'></a><a href='#L8'>8</a> 57 <a name='L9'></a><a href='#L9'>9</a> 58 <a name='L10'></a><a 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class="cline-any cline-neutral"> </span> 228 <span class="cline-any cline-neutral"> </span> 229 <span class="cline-any cline-yes">1x</span> 230 <span class="cline-any cline-yes">1x</span> 231 <span class="cline-any cline-no"> </span> 232 <span class="cline-any cline-no"> </span> 233 <span class="cline-any cline-neutral"> </span> 234 <span class="cline-any cline-no"> </span> 235 <span class="cline-any cline-neutral"> </span> 236 <span class="cline-any cline-neutral"> </span> 237 <span class="cline-any cline-neutral"> </span> 238 <span class="cline-any cline-neutral"> </span> 239 <span class="cline-any cline-neutral"> </span> 240 <span class="cline-any cline-neutral"> </span> 241 <span class="cline-any cline-neutral"> </span> 242 <span class="cline-any cline-neutral"> </span> 243 <span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">// A Javascript implementaion of the "xorshift7" algorithm by 244 // François Panneton and Pierre L'ecuyer: 245 // "On the Xorgshift Random Number Generators" 246 // http://saluc.engr.uconn.edu/refs/crypto/rng/panneton05onthexorshift.pdf 247 248 (function(global, module, define) { 249 250 function XorGen(seed) { 251 var me = this; 252 253 // Set up generator function. 254 me.next = function() { 255 // Update xor generator. 256 var X = me.x, i = me.i, t, v, w; 257 t = X[i]; t ^= (t >>> 7); v = t ^ (t << 24); 258 t = X[(i + 1) & 7]; v ^= t ^ (t >>> 10); 259 t = X[(i + 3) & 7]; v ^= t ^ (t >>> 3); 260 t = X[(i + 4) & 7]; v ^= t ^ (t << 7); 261 t = X[(i + 7) & 7]; t = t ^ (t << 13); v ^= t ^ (t << 9); 262 X[i] = v; 263 me.i = (i + 1) & 7; 264 return v; 265 }; 266 267 function init(me, seed) { 268 var j, w, X = []; 269 270 if (seed === (seed | 0)) { 271 // Seed state array using a 32-bit integer. 272 w = X[0] = seed; 273 } else { 274 // Seed state using a string. 275 seed = '' + seed; 276 for (j = 0; j < seed.length; ++j) { 277 X[j & 7] = (X[j & 7] << 15) ^ 278 (seed.charCodeAt(j) + X[(j + 1) & 7] << 13); 279 } 280 } 281 // Enforce an array length of 8, not all zeroes. 282 while (X.length < 8) X.push(0); 283 for (j = 0; j < 8 && X[j] === 0; ++j); 284 if (j == 8) w = X[7] = -1; else w = X[j]; 285 286 me.x = X; 287 me.i = 0; 288 289 // Discard an initial 256 values. 290 for (j = 256; j > 0; --j) { 291 me.next(); 292 } 293 } 294 295 init(me, seed); 296 } 297 298 function copy(f, t) { 299 t.x = f.x.slice(); 300 t.i = f.i; 301 return t; 302 } 303 304 function impl(seed, opts) { 305 <span class="missing-if-branch" title="if path not taken" >I</span>if (seed == null) <span class="cstat-no" title="statement not covered" >seed = +(new Date);</span> 306 var xg = new XorGen(seed), 307 state = opts && opts.state, 308 prng = function() { return (xg.next() >>> 0) / 0x100000000; }; 309 prng.double = function() { 310 do { 311 var top = xg.next() >>> 11, 312 bot = (xg.next() >>> 0) / 0x100000000, 313 result = (top + bot) / (1 << 21); 314 } while (result === 0); 315 return result; 316 }; 317 prng.int32 = xg.next; 318 prng.quick = prng; 319 if (state) { 320 if (state.x) copy(state, xg); 321 prng.state = function() { return copy(xg, {}); } 322 } 323 return prng; 324 } 325 326 <span class="missing-if-branch" title="else path not taken" >E</span>if (module && module.exports) { 327 module.exports = impl; 328 } else <span class="cstat-no" title="statement not covered" >if (define && define.amd) {</span> 329 <span class="cstat-no" title="statement not covered" > define(<span class="fstat-no" title="function not covered" >fu</span>nction() { <span class="cstat-no" title="statement not covered" >return impl; </span>});</span> 330 } else { 331 <span class="cstat-no" title="statement not covered" > this.xorshift7 = impl;</span> 332 } 333 334 })( 335 this, 336 (typeof module) == 'object' && module, // present in node.js 337 (typeof define) == 'function' && <span class="branch-1 cbranch-no" title="branch not covered" >define </span> // present with an AMD loader 338 ); 339 340 </pre></td></tr> 341 </table></pre> 342 <div class='push'></div><!-- for sticky footer --> 343 </div><!-- /wrapper --> 344 <div class='footer quiet pad2 space-top1 center small'> 345 Code coverage 346 generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Tue Sep 17 2019 06:35:34 GMT-0400 (Eastern Daylight Time) 347 </div> 348 </div> 349 <script src="../../prettify.js"></script> 350 <script> 351 window.onload = function () { 352 if (typeof prettyPrint === 'function') { 353 prettyPrint(); 354 } 355 }; 356 </script> 357 <script src="../../sorter.js"></script> 358 <script src="../../block-navigation.js"></script> 359 </body> 360 </html>