'use strict';

var constants;
var hasRequiredConstants;

function requireConstants () {
	if (hasRequiredConstants) return constants;
	hasRequiredConstants = 1;

	// (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.

	constants = {

	  /* Allowed flush values; see deflate() and inflate() below for details */
	  Z_NO_FLUSH:         0,
	  Z_PARTIAL_FLUSH:    1,
	  Z_SYNC_FLUSH:       2,
	  Z_FULL_FLUSH:       3,
	  Z_FINISH:           4,
	  Z_BLOCK:            5,
	  Z_TREES:            6,

	  /* Return codes for the compression/decompression functions. Negative values
	  * are errors, positive values are used for special but normal events.
	  */
	  Z_OK:               0,
	  Z_STREAM_END:       1,
	  Z_NEED_DICT:        2,
	  Z_ERRNO:           -1,
	  Z_STREAM_ERROR:    -2,
	  Z_DATA_ERROR:      -3,
	  //Z_MEM_ERROR:     -4,
	  Z_BUF_ERROR:       -5,
	  //Z_VERSION_ERROR: -6,

	  /* compression levels */
	  Z_NO_COMPRESSION:         0,
	  Z_BEST_SPEED:             1,
	  Z_BEST_COMPRESSION:       9,
	  Z_DEFAULT_COMPRESSION:   -1,


	  Z_FILTERED:               1,
	  Z_HUFFMAN_ONLY:           2,
	  Z_RLE:                    3,
	  Z_FIXED:                  4,
	  Z_DEFAULT_STRATEGY:       0,

	  /* Possible values of the data_type field (though see inflate()) */
	  Z_BINARY:                 0,
	  Z_TEXT:                   1,
	  //Z_ASCII:                1, // = Z_TEXT (deprecated)
	  Z_UNKNOWN:                2,

	  /* The deflate compression method */
	  Z_DEFLATED:               8
	  //Z_NULL:                 null // Use -1 or null inline, depending on var type
	};
	return constants;
}

exports.__require = requireConstants;
