You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.0 KiB
48 lines
1.0 KiB
"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()
|
|
}
|
|
|