# All files / node_modules/upng-js/node_modules/pako/lib/zlib gzheader.js

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    18x
     'use strict';

    // (C) 1995-2013 Jean-loup Gailly and Mark Adler
    // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
    //
    // This software is provided 'as-is', without any express or implied
    // warranty. In no event will the authors be held liable for any damages
    // arising from the use of this software.
    //
    // Permission is granted to anyone to use this software for any purpose,
    // including commercial applications, and to alter it and redistribute it
    // freely, subject to the following restrictions:
    //
    // 1. The origin of this software must not be misrepresented; you must not
    //   claim that you wrote the original software. If you use this software
    //   in a product, an acknowledgment in the product documentation would be
    //   appreciated but is not required.
    // 2. Altered source versions must be plainly marked as such, and must not be
    //   misrepresented as being the original software.
    // 3. This notice may not be removed or altered from any source distribution.

    function GZheader() {
      /* true if compressed data believed to be text */
      this.text       = 0;
      /* modification time */
      this.time       = 0;
      /* extra flags (not used when writing a gzip file) */
      this.xflags     = 0;
      /* operating system */
      this.os         = 0;
      /* pointer to extra field or Z_NULL if none */
      this.extra      = null;
      /* extra field length (valid if extra != Z_NULL) */
      this.extra_len  = 0; // Actually, we don't need it in JS,
                           // but leave for few code modifications

      //
      // Setup limits is not necessary because in js we should not preallocate memory
      // for inflate use constant limit in 65536 bytes
      //

      /* space at extra (only when reading header) */
      // this.extra_max  = 0;
      /* pointer to zero-terminated file name or Z_NULL */
      this.name       = '';
      /* space at name (only when reading header) */
      // this.name_max   = 0;
      /* pointer to zero-terminated comment or Z_NULL */
      this.comment    = '';
      /* space at comment (only when reading header) */
      // this.comm_max   = 0;
      /* true if there was or will be a header crc */
      this.hcrc       = 0;
      /* true when done reading gzip header (not used when writing a gzip file) */
      this.done       = false;
    }

    module.exports = GZheader;