53 lines
1.1 KiB
JavaScript
Vendored
53 lines
1.1 KiB
JavaScript
Vendored
"use strict";
|
|
|
|
var BOMChar = '\uFEFF';
|
|
|
|
exports.PrependBOM = PrependBOMWrapper
|
|
function PrependBOMWrapper(encoder, options) {
|
|
this.encoder = encoder;
|
|
this.addBOM = true;
|
|
}
|
|
|
|
PrependBOMWrapper.prototype.write = function(str) {
|
|
if (this.addBOM) {
|
|
str = BOMChar + str;
|
|
this.addBOM = false;
|
|
}
|
|
|
|
return this.encoder.write(str);
|
|
}
|
|
|
|
PrependBOMWrapper.prototype.end = function() {
|
|
return this.encoder.end();
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
exports.StripBOM = StripBOMWrapper;
|
|
function StripBOMWrapper(decoder, options) {
|
|
this.decoder = decoder;
|
|
this.pass = false;
|
|
this.options = options || {};
|
|
}
|
|
|
|
StripBOMWrapper.prototype.write = function(buf) {
|
|
var res = this.decoder.write(buf);
|
|
if (this.pass || !res)
|
|
return res;
|
|
|
|
if (res[0] === BOMChar) {
|
|
res = res.slice(1);
|
|
if (typeof this.options.stripBOM === 'function')
|
|
this.options.stripBOM();
|
|
}
|
|
|
|
this.pass = true;
|
|
return res;
|
|
}
|
|
|
|
StripBOMWrapper.prototype.end = function() {
|
|
return this.decoder.end();
|
|
}
|
|
|