Return to gzip.h CVS log

Up to [local] / src / usr.bin / gzsig

Annotation of src/usr.bin/gzsig/gzip.h, Revision 1.2

1.1       marius      1: /*
                      2:  * gzip.h
                      3:  *
                      4:  * Copyright (c) 2001 Dug Song <dugsong@arbor.net>
                      5:  * Copyright (c) 2001 Arbor Networks, Inc.
                      6:  *
                      7:  *   Redistribution and use in source and binary forms, with or without
                      8:  *   modification, are permitted provided that the following conditions
                      9:  *   are met:
                     10:  *
                     11:  *   1. Redistributions of source code must retain the above copyright
                     12:  *      notice, this list of conditions and the following disclaimer.
                     13:  *   2. Redistributions in binary form must reproduce the above copyright
                     14:  *      notice, this list of conditions and the following disclaimer in the
                     15:  *      documentation and/or other materials provided with the distribution.
                     16:  *   3. The names of the copyright holders may not be used to endorse or
                     17:  *      promote products derived from this software without specific
                     18:  *      prior written permission.
                     19:  *
                     20:  *   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
                     21:  *   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
                     22:  *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
                     23:  *   THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
                     24:  *   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
                     25:  *   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
                     26:  *   OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
                     27:  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
                     28:  *   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
                     29:  *   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     30:  *
1.2     ! marius     31:  * $Vendor: gzip.h,v 1.2 2005/04/01 16:47:31 dugsong Exp $
1.1       marius     32:  */
                     33:
                     34: #ifndef GZIP_H
                     35: #define GZIP_H
                     36:
                     37: /* RFC 1952 is b0rked! This is from gzip-1.2.4's algorithm.doc... */
                     38:
                     39: /* Magic header */
                     40: #define GZIP_MAGIC             "\037\213"
                     41:
                     42: /* Compression methods */
                     43: #define GZIP_MSTORED           0
                     44: #define GZIP_MCOMPRESS         1
                     45: #define GZIP_MPACKED           2
                     46: #define GZIP_MLZHED            3
                     47: #define GZIP_MDEFLATE          8
                     48:
                     49: /* Flags */
                     50: #define GZIP_FTEXT             0x01
                     51: #define GZIP_FCONT             0x02    /* never set by gzip-1.2.4 */
                     52: #define GZIP_FEXTRA            0x04
                     53: #define GZIP_FNAME             0x08
                     54: #define GZIP_FCOMMENT          0x10
                     55: #define GZIP_FENCRYPT          0x20
                     56: #define GZIP_FRESERVED         0xC0
                     57:
                     58: #define GZIP_FENCRYPT_LEN      12
                     59:
                     60: #define GZSIG_ID               "GS"
                     61: #define GZSIG_VERSION          1
                     62:
                     63: struct gzsig_data {
                     64:        u_char  version;
                     65: #ifdef COMMENT_ONLY
                     66:        u_char  signature[];
                     67: #endif
                     68: };
                     69:
                     70: /*
                     71:  * Note: all number fields below are in little-endian byte order.
                     72:  */
                     73:
                     74: struct gzip_xfield {
                     75:        u_short len;
                     76:        struct gzip_subfield {
                     77:                u_char  id[2];
                     78:                u_short len;
                     79: #ifdef COMMENT_ONLY
                     80:                u_char  data[];
                     81: #endif
                     82:        } subfield;
                     83: };
                     84:
                     85: struct gzip_header {
                     86:        u_char          magic[2];
                     87:        u_char          method;
                     88:        u_char          flags;
                     89:        u_char          mtime[4];
                     90:        u_char          xflags;
                     91:        u_char          os;
                     92: #if COMMENT_ONLY
                     93:        /* Optional fields */
                     94:        u_char          part[2];                /* flags & GZIP_FCONT */
                     95:        struct gzip_xfield xfield;              /* flags & GZIP_FEXTRA */
                     96:        char            filename[];             /* flags & GZIP_FNAME */
                     97:        char            comment[];              /* flags & GZIP_FCOMMENT */
                     98:        u_char          encrypt_hdr[12];        /* flags & GZIP_FENCRYPT */
                     99: #endif
                    100: };
                    101:
                    102: struct gzip_trailer {
                    103:        u_int32_t       crc32[4];
                    104:        u_int32_t       size[4];
                    105: };
                    106:
                    107: #endif /* GZIP_H */