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- /*
- This file is part of BioD.
- Copyright (C) 2012 Artem Tarasov <lomereiter@gmail.com>
-
- Permission is hereby granted, free of charge, to any person obtaining a
- copy of this software and associated documentation files (the "Software"),
- to deal in the Software without restriction, including without limitation
- the rights to use, copy, modify, merge, publish, distribute, sublicense,
- and/or sell copies of the Software, and to permit persons to whom the
- Software is furnished to do so, subject to the following conditions:
-
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- DEALINGS IN THE SOFTWARE.
-
- */
- module bio.core.bgzf.constants;
-
- immutable BGZF_MAGIC = 0x04_08_8B_1F; // little endian
-
- immutable ubyte[16] BLOCK_HEADER_START =
- [ 31, 139, 8, 4, // BGZF magic
- 0, 0, 0, 0, // GZIP modification time
- 0, // GZIP extra flags
- 255, // GZIP OS identifier
- 6, 0, // GZIP extra length == 6 (LE)
- 66, 67, // Subfield 'BC'
- 2, 0]; // Subfield length (holds 1 ushort)
-
- // empty block
- immutable ubyte[28] BGZF_EOF =
- [31, 139, 8, 4,
- 0, 0, 0, 0,
- 0,
- 255,
- 6, 0,
- 66, 67,
- 2, 0,
- 27, 0,
- 3, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0];
-
-
-
- // BGZF block header length in bytes.
- // Block header holds BLOCK_HEADER_START + block size (ushort)
- immutable BLOCK_HEADER_LENGTH = BLOCK_HEADER_START.length + ushort.sizeof;
-
- // BGZF footer holds CRC32 and size of decompressed block.
- immutable BLOCK_FOOTER_LENGTH = uint.sizeof + uint.sizeof;
-
- immutable BGZF_MAX_BLOCK_SIZE = 65536;
- immutable BGZF_BLOCK_SIZE = 0xFF00;
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