Server : nginx/1.20.1 System : Linux ccpf-production-2021 5.4.0-148-generic #165-Ubuntu SMP Tue Apr 18 08:53:12 UTC 2023 x86_64 User : forge ( 1000) PHP Version : 7.4.21 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /lib/node_modules/gulp/node_modules/remove-bom-stream/

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'use strict';

var through = require('through2');
var removeBom = require('remove-bom-buffer');
var SafeBuffer = require('safe-buffer').Buffer;

function removeBomStream() {
  var completed = false;
  var buffer = SafeBuffer.alloc(0);

  return through(onChunk, onFlush);

  function removeAndCleanup(data) {
    completed = true;

    buffer = null;

    return removeBom(data);
  }

  function onChunk(data, enc, cb) {
    if (completed) {
      return cb(null, data);
    }

    if (data.length >= 7) {
      return cb(null, removeAndCleanup(data));
    }

    var bufferLength = buffer.length;
    var chunkLength = data.length;
    var totalLength = bufferLength + chunkLength;

    buffer = SafeBuffer.concat([buffer, data], totalLength);

    if (totalLength >= 7) {
      return cb(null, removeAndCleanup(buffer));
    }
    cb();
  }

  function onFlush(cb) {
    if (completed || !buffer) {
      return cb();
    }

    cb(null, removeAndCleanup(buffer));
  }
}

module.exports = removeBomStream;