mirror of https://github.com/webpack/webpack.git
78 lines
1.5 KiB
JavaScript
78 lines
1.5 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
"use strict";
|
|
|
|
const BULK_SIZE = 1000;
|
|
|
|
class BulkUpdateDecorator {
|
|
constructor(hash) {
|
|
this.hash = hash;
|
|
this.buffer = "";
|
|
}
|
|
|
|
update(data, inputEncoding) {
|
|
if (
|
|
inputEncoding !== undefined ||
|
|
typeof data !== "string" ||
|
|
data.length > BULK_SIZE
|
|
) {
|
|
if (this.buffer.length > 0) {
|
|
this.hash.update(this.buffer);
|
|
this.buffer = "";
|
|
}
|
|
this.hash.update(data, inputEncoding);
|
|
} else {
|
|
this.buffer += data;
|
|
if (this.buffer.length > BULK_SIZE) {
|
|
this.hash.update(this.buffer);
|
|
this.buffer = "";
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
|
|
digest(encoding) {
|
|
if (this.buffer.length > 0) {
|
|
this.hash.update(this.buffer);
|
|
}
|
|
var digestResult = this.hash.digest(encoding);
|
|
return typeof digestResult === "string"
|
|
? digestResult
|
|
: digestResult.toString();
|
|
}
|
|
}
|
|
|
|
/* istanbul ignore next */
|
|
class DebugHash {
|
|
constructor() {
|
|
this.string = "";
|
|
}
|
|
|
|
update(data, inputEncoding) {
|
|
if (typeof data !== "string") data = data.toString("utf-8");
|
|
this.string += data;
|
|
return this;
|
|
}
|
|
|
|
digest(encoding) {
|
|
return this.string.replace(/[^a-z0-9]+/gi, m =>
|
|
Buffer.from(m).toString("hex")
|
|
);
|
|
}
|
|
}
|
|
|
|
module.exports = algorithm => {
|
|
if (typeof algorithm === "function") {
|
|
return new BulkUpdateDecorator(new algorithm());
|
|
}
|
|
switch (algorithm) {
|
|
// TODO add non-cryptographic algorithm here
|
|
case "debug":
|
|
return new DebugHash();
|
|
default:
|
|
return new BulkUpdateDecorator(require("crypto").createHash(algorithm));
|
|
}
|
|
};
|