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Diffstat (limited to 'src/usr.bin/gzsig/gzip.h')
| -rw-r--r-- | src/usr.bin/gzsig/gzip.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/usr.bin/gzsig/gzip.h b/src/usr.bin/gzsig/gzip.h new file mode 100644 index 0000000..750a327 --- /dev/null +++ b/src/usr.bin/gzsig/gzip.h @@ -0,0 +1,107 @@ +/* + * gzip.h + * + * Copyright (c) 2001 Dug Song <dugsong@arbor.net> + * Copyright (c) 2001 Arbor Networks, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the copyright holders may not be used to endorse or + * promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $Vendor: gzip.h,v 1.2 2005/04/01 16:47:31 dugsong Exp $ + */ + +#ifndef GZIP_H +#define GZIP_H + +/* RFC 1952 is b0rked! This is from gzip-1.2.4's algorithm.doc... */ + +/* Magic header */ +#define GZIP_MAGIC "\037\213" + +/* Compression methods */ +#define GZIP_MSTORED 0 +#define GZIP_MCOMPRESS 1 +#define GZIP_MPACKED 2 +#define GZIP_MLZHED 3 +#define GZIP_MDEFLATE 8 + +/* Flags */ +#define GZIP_FTEXT 0x01 +#define GZIP_FCONT 0x02 /* never set by gzip-1.2.4 */ +#define GZIP_FEXTRA 0x04 +#define GZIP_FNAME 0x08 +#define GZIP_FCOMMENT 0x10 +#define GZIP_FENCRYPT 0x20 +#define GZIP_FRESERVED 0xC0 + +#define GZIP_FENCRYPT_LEN 12 + +#define GZSIG_ID "GS" +#define GZSIG_VERSION 1 + +struct gzsig_data { + u_char version; +#ifdef COMMENT_ONLY + u_char signature[]; +#endif +}; + +/* + * Note: all number fields below are in little-endian byte order. + */ + +struct gzip_xfield { + u_short len; + struct gzip_subfield { + u_char id[2]; + u_short len; +#ifdef COMMENT_ONLY + u_char data[]; +#endif + } subfield; +}; + +struct gzip_header { + u_char magic[2]; + u_char method; + u_char flags; + u_char mtime[4]; + u_char xflags; + u_char os; +#if COMMENT_ONLY + /* Optional fields */ + u_char part[2]; /* flags & GZIP_FCONT */ + struct gzip_xfield xfield; /* flags & GZIP_FEXTRA */ + char filename[]; /* flags & GZIP_FNAME */ + char comment[]; /* flags & GZIP_FCOMMENT */ + u_char encrypt_hdr[12]; /* flags & GZIP_FENCRYPT */ +#endif +}; + +struct gzip_trailer { + u_int32_t crc32[4]; + u_int32_t size[4]; +}; + +#endif /* GZIP_H */ |