34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
const version = +(process.versions ? process.versions.node : "").split(".")[0] || 0;
|
|
|
|
module.exports = function (/*Buffer*/ inbuf, /*number*/ expectedLength) {
|
|
var zlib = require("zlib");
|
|
const option = version >= 15 && expectedLength > 0 ? { maxOutputLength: expectedLength } : {};
|
|
|
|
return {
|
|
inflate: function () {
|
|
return zlib.inflateRawSync(inbuf, option);
|
|
},
|
|
|
|
inflateAsync: function (/*Function*/ callback) {
|
|
var tmp = zlib.createInflateRaw(option),
|
|
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);
|
|
}
|
|
};
|
|
};
|