twitst4tz

twitter statistics web application
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bom-handling.js (1109B)

      1 "use strict";
      2 
      3 var BOMChar = '\uFEFF';
      4 
      5 exports.PrependBOM = PrependBOMWrapper
      6 function PrependBOMWrapper(encoder, options) {
      7     this.encoder = encoder;
      8     this.addBOM = true;
      9 }
     10 
     11 PrependBOMWrapper.prototype.write = function(str) {
     12     if (this.addBOM) {
     13         str = BOMChar + str;
     14         this.addBOM = false;
     15     }
     16 
     17     return this.encoder.write(str);
     18 }
     19 
     20 PrependBOMWrapper.prototype.end = function() {
     21     return this.encoder.end();
     22 }
     23 
     24 
     25 //------------------------------------------------------------------------------
     26 
     27 exports.StripBOM = StripBOMWrapper;
     28 function StripBOMWrapper(decoder, options) {
     29     this.decoder = decoder;
     30     this.pass = false;
     31     this.options = options || {};
     32 }
     33 
     34 StripBOMWrapper.prototype.write = function(buf) {
     35     var res = this.decoder.write(buf);
     36     if (this.pass || !res)
     37         return res;
     38 
     39     if (res[0] === BOMChar) {
     40         res = res.slice(1);
     41         if (typeof this.options.stripBOM === 'function')
     42             this.options.stripBOM();
     43     }
     44 
     45     this.pass = true;
     46     return res;
     47 }
     48 
     49 StripBOMWrapper.prototype.end = function() {
     50     return this.decoder.end();
     51 }
     52