54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
var T = require('../').table;
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var old = require('crc-32').str;
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var cur = require('../').str;
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function sheetjs1(utf8) {
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var buf = new Buffer(utf8);
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for(var C = -1, i = 0; i != buf.length; ++i) {
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C = (C >>> 8) ^ T[(C ^ buf[i]) & 0xFF];
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}
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return C ^ -1;
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}
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function sheetjs2(str) {
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var C = -1;
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for(var i = 0, L=str.length, c, d; i < L;) {
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c = str.charCodeAt(i++);
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if(c < 0x80) {
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C = (C>>>8) ^ T[(C ^ c)&0xFF];
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} else if(c < 0x800) {
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C = (C>>>8) ^ T[(C ^ (192|((c>>6)&31)))&0xFF];
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C = (C>>>8) ^ T[(C ^ (128|(c&63)))&0xFF];
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} else if(c >= 0xD800 && c < 0xE000) {
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c = (c&1023)+64; d = str.charCodeAt(i++)&1023;
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C = (C>>>8) ^ T[(C ^ (240|((c>>8)&7)))&0xFF];
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C = (C>>>8) ^ T[(C ^ (128|((c>>2)&63)))&0xFF];
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C = (C>>>8) ^ T[(C ^ (128|((d>>6)&15)|((c&3)<<4)))&0xFF];
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C = (C>>>8) ^ T[(C ^ (128|(d&63)))&0xFF];
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} else {
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C = (C>>>8) ^ T[(C ^ (224|((c>>12)&15)))&0xFF];
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C = (C>>>8) ^ T[(C ^ (128|((c>>6)&63)))&0xFF];
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C = (C>>>8) ^ T[(C ^ (128|(c&63)))&0xFF];
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}
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}
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return C ^ -1;
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}
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var foobar = "foo bar baz٪☃🍣";
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for(var i = 0; i != 4; ++i) foobar += " " + foobar;
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var assert = require('assert');
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{
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assert.equal(sheetjs1(foobar), sheetjs2(foobar));
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assert.equal(sheetjs1(foobar), old(foobar));
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assert.equal(sheetjs1(foobar), cur(foobar));
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}
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var BM = require('./bm');
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var suite = new BM('unicode string');
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suite.add('sheetjs 1', function() { for(var j = 0; j != 1000; ++j) sheetjs1(foobar); });
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suite.add('sheetjs 2', function() { for(var j = 0; j != 1000; ++j) sheetjs2(foobar); });
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suite.add('last vers', function() { for(var j = 0; j != 1000; ++j) old(foobar); });
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suite.add('current v', function() { for(var j = 0; j != 1000; ++j) cur(foobar); });
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suite.run();
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