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static/plugins/spice-html5/spicearraybuffer.js 1.85 KB
831eac332   zhuzhenchao   add file
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  "use strict";
  /*
     Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
  
     This file is part of spice-html5.
  
     spice-html5 is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     spice-html5 is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  /*----------------------------------------------------------------------------
  **  SpiceArrayBufferSlice
  **    This function is a work around for IE 10, which has no slice()
  **    method in it's subclass.
  **--------------------------------------------------------------------------*/
  function SpiceArrayBufferSlice(start, end)
  {
      start = start || 0;
      end = end || this.byteLength;
      if (end < 0)
          end = this.byteLength + end;
      if (start < 0)
          start = this.byteLength + start;
      if (start < 0)
          start = 0;
      if (end < 0)
          end = 0;
      if (end > this.byteLength)
          end = this.byteLength;
      if (start > end)
          start = end;
  
      var ret = new ArrayBuffer(end - start);
      var in1 = new Uint8Array(this, start, end - start);
      var out = new Uint8Array(ret);
      var i;
  
      for (i = 0; i < end - start; i++)
          out[i] = in1[i];
  
      return ret;
  }
  
  if (! ArrayBuffer.prototype.slice)
  {
      ArrayBuffer.prototype.slice = SpiceArrayBufferSlice;
      console.log("WARNING:  ArrayBuffer.slice() is missing; we are extending ArrayBuffer to compensate");
  }