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112 lines
4.3 KiB
JavaScript
112 lines
4.3 KiB
JavaScript
/* zlib.js -- JavaScript implementation for the zlib.
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Version: 0.2.0
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LastModified: Apr 12 2012
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Copyright (C) 2012 Masanao Izumo <iz@onicos.co.jp>
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The original copyright notice (zlib 1.2.6):
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Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jean-loup Gailly Mark Adler
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jloup@gzip.org madler@alumni.caltech.edu
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The data format used by the zlib library is described by RFCs (Request for
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Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
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(zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
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*/
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var ZLIB = ( ZLIB || {} ); // ZLIB namespace initialization
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// common definitions
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if(typeof ZLIB.common_initialized === 'undefined') {
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ZLIB.Z_NO_FLUSH = 0;
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ZLIB.Z_PARTIAL_FLUSH = 1;
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ZLIB.Z_SYNC_FLUSH = 2;
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ZLIB.Z_FULL_FLUSH = 3;
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ZLIB.Z_FINISH = 4;
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ZLIB.Z_BLOCK = 5;
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ZLIB.Z_TREES = 6;
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/* Allowed flush values; see deflate() and inflate() below for details */
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ZLIB.Z_OK = 0;
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ZLIB.Z_STREAM_END = 1;
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ZLIB.Z_NEED_DICT = 2;
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ZLIB.Z_ERRNO = (-1);
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ZLIB.Z_STREAM_ERROR = (-2);
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ZLIB.Z_DATA_ERROR = (-3);
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ZLIB.Z_MEM_ERROR = (-4);
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ZLIB.Z_BUF_ERROR = (-5);
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ZLIB.Z_VERSION_ERROR = (-6);
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/* Return codes for the compression/decompression functions. Negative values
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* are errors, positive values are used for special but normal events.
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*/
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ZLIB.Z_DEFLATED = 8; /* The deflate compression method (the only one supported in this version) */
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/**
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* z_stream constructor
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* @constructor
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*/
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ZLIB.z_stream = function() {
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this.next_in = 0; /* next input byte */
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this.avail_in = 0; /* number of bytes available in input_data */
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this.total_in = 0; /* total number of input bytes read so far */
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this.next_out = 0; /* next output byte */
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this.avail_out = 0; /* remaining free space at next_out */
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this.total_out = 0; /* total number of bytes output so far */
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this.msg = null; /* last error message, null if no error */
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this.state = null; /* not visible by applications */
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this.data_type = 0; /* best guess about the data type: binary or text */
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this.adler = 0; /* TODO: adler32 value of the uncompressed data */
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// zlib.js
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this.input_data = ''; /* input data */
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this.output_data = ''; /* output data */
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this.error = 0; /* error code */
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this.checksum_function = null; /* crc32(for gzip) or adler32(for zlib) */
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};
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/**
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* TODO
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* @constructor
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*/
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ZLIB.gz_header = function() {
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this.text = 0; /* true if compressed data believed to be text */
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this.time = 0; /* modification time */
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this.xflags = 0; /* extra flags (not used when writing a gzip file) */
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this.os = 0xff; /* operating system */
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this.extra = null; /* extra field string or null if none */
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this.extra_len = 0; /* this.extra.length (only when reading header) */
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this.extra_max = 0; /* space at extra (only when reading header) */
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this.name = null; /* file name string or null if none */
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this.name_max = 0; /* space at name (only when reading header) */
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this.comment = null; /* comment string or null if none */
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this.comm_max = 0; /* space at comment (only when reading header) */
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this.hcrc = 0; /* true if there was or will be a header crc */
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this.done = 0; /* true when done reading gzip header (not used
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when writing a gzip file) */
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};
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ZLIB.common_initialized = true;
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} // common definitions
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