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1/* -*- Mode: C;-*-
2 *
3 * This file is part of XDelta - A binary delta generator.
4 *
5 * Copyright (C) 1997, 1998, 1999 Josh MacDonald
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 * Author: Josh MacDonald <jmacd@CS.Berkeley.EDU>
22 *
23 * $Id: xdeltapriv.h 1.29 Sat, 03 Apr 1999 20:09:14 -0800 jmacd $
24 */
25
26#ifndef _XDELTAPRIV_H_
27#define _XDELTAPRIV_H_
28
29#if 0
30#define DEBUG_CKSUM_UPDATE
31#define DEBUG_MATCH_PRINT
32#define DEBUG_CKSUM
33#define DEBUG_HASH
34#define DEBUG_INST
35#define CLOBBER_ALGORITHM_C
36#define DEBUG_MD5
37#define DEBUG_CONT
38#define DEBUG_COPY
39#define DEBUG_FIND
40#define DEBUG_RSYNC_REQUEST
41#define DEBUG_CONT
42#define DEBUG_CONT2
43#define DEBUG_CHECK_CONTROL
44#endif
45
46typedef struct _XdeltaPos XdeltaPos;
47typedef struct _RsyncHash RsyncHash;
48
49#define XPOS(p) (((p).page * (p).page_size) + (p).off)
50
51struct _XdeltaPos {
52 guint page;
53 guint page_size;
54 guint off;
55
56 const guint8* mem;
57 guint mem_page;
58 guint mem_rem;
59};
60
61#define handle_length(x) ((* (x)->table->table_handle_length) (x))
62#define handle_pages(x) ((* (x)->table->table_handle_pages) (x))
63#define handle_pagesize(x) ((* (x)->table->table_handle_pagesize) (x))
64#define handle_map_page(x,y,z) ((* (x)->table->table_handle_map_page) ((x),(y),(z)))
65#define handle_unmap_page(x,y,z) ((* (x)->table->table_handle_unmap_page) ((x),(y),(z)))
66#define handle_checksum_md5(x) ((* (x)->table->table_handle_checksum_md5) (x))
67#define handle_close(x,y) ((* (x)->table->table_handle_close) ((x), (y)))
68#define handle_write(x,y,z) ((* (x)->table->table_handle_write) ((x),(y),(z)))
69#define handle_copy(x,y,z,a) ((* (x)->table->table_handle_copy) ((x),(y),(z),(a)))
70
71struct _XdeltaGenerator
72{
73 GPtrArray *sources;
74
75 const guint32 *table;
76 guint table_size;
77
78 guint to_output_pos;
79 guint data_output_pos;
80
81 XdeltaOutStream *data_out;
82 XdeltaOutStream *control_out;
83
84 XdeltaControl *control;
85
86 XdeltaSource *data_source;
87
88#ifdef DEBUG_HASH
89 gint hash_conflicts; /* bucket already used. */
90 gint hash_real_conflicts; /* bucket had different checksum. */
91 gint hash_real_real_conflicts; /* bucket had same checksum, different region */
92 gint hash_fill;
93 gint hash_entries;
94#endif
95
96 EdsioMD5Ctx ctx;
97};
98
99struct _XdeltaSource
100{
101 XdeltaStream *source_in;
102 XdeltaPos source_pos;
103
104 gint ck_count; /* number of elts in cksums. */
105 const XdeltaChecksum *cksums; /* array of cksums. */
106
107 const char *name;
108
109 XdeltaStream *index_in;
110 XdeltaOutStream *index_out;
111
112 gint source_index;
113 gboolean used;
114 gboolean sequential;
115 guint32 position;
116};
117
118#define CHEW(x) (single_hash[(guint)x])
119#define FLIP_FORWARD(p) if ((p).off == (p).page_size) { (p).page += 1; (p).off = 0; }
120
121extern const guint16 single_hash[256];
122
123void init_pos (XdeltaStream* str, XdeltaPos* pos);
124gboolean unmap_page (XdeltaStream* stream, XdeltaPos* pos);
125gboolean map_page (XdeltaStream* stream, XdeltaPos* pos);
126gboolean check_stream_integrity (XdeltaStream* str, const guint8* md5, guint len);
127XdeltaControl* control_new (void);
128
129guint c_hash (const XdeltaChecksum* c);
130
131#endif /* _XDELTAPRIV_H_ */