/
deflater.js
33 lines (30 loc) · 1021 Bytes
/
deflater.js
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module.exports = function (/*Buffer*/ inbuf) {
var zlib = require("zlib");
var opts = { chunkSize: (parseInt(inbuf.length / 1024) + 1) * 1024 };
return {
deflate: function () {
return zlib.deflateRawSync(inbuf, opts);
},
deflateAsync: function (/*Function*/ callback) {
var tmp = zlib.createDeflateRaw(opts),
parts = [],
total = 0;
tmp.on("data", function (data) {
parts.push(data);
total += data.length;
});
tmp.on("end", function () {
var buf = Buffer.alloc(total),
written = 0;
buf.fill(0);
for (var i = 0; i < parts.length; i++) {
var part = parts[i];
part.copy(buf, written);
written += part.length;
}
callback && callback(buf);
});
tmp.end(inbuf);
}
};
};