'use strict';

var common = require('../common.js');

var StringDecoder = require('string_decoder').StringDecoder;

var bench = common.createBenchmark(main, {

encoding: ['ascii', 'utf8', 'base64-utf8', 'base64-ascii'],

inlen: [32, 128, 1024],

chunk: [16, 64, 256, 1024],

n: [25e4]

});

var UTF_ALPHA = 'Blåbærsyltetøy';

var ASC_ALPHA = 'Blueberry jam';

function main(conf) {

var encoding = conf.encoding;

var inLen = conf.inlen | 0;

var chunkLen = conf.chunk | 0;

var n = conf.n | 0;

var alpha;

var chunks = [];

var str = '';

var isBase64 = (encoding === 'base64-ascii' || encoding === 'base64-utf8');

var i;

if (encoding === 'ascii' || encoding === 'base64-ascii')

alpha = ASC_ALPHA;

else if (encoding === 'utf8' || encoding === 'base64-utf8')

alpha = UTF_ALPHA;

else

throw new Error('Bad encoding');

var sd = new StringDecoder(isBase64 ? 'base64' : encoding);

for (i = 0; i < inLen; ++i) {

if (i > 0 && (i % chunkLen) === 0 && !isBase64) {

chunks.push(Buffer.from(str, encoding));

str = '';

}

str += alpha[i % alpha.length];

}

if (str.length > 0 && !isBase64)

chunks.push(Buffer.from(str, encoding));

if (isBase64) {

str = Buffer.from(str, 'utf8').toString('base64');

while (str.length > 0) {

var len = Math.min(chunkLen, str.length);

chunks.push(Buffer.from(str.substring(0, len), 'utf8'));

str = str.substring(len);

}

}

var nChunks = chunks.length;

bench.start();

for (i = 0; i < n; ++i) {

for (var j = 0; j < nChunks; ++j)

sd.write(chunks[j]);

}

bench.end(n);

}