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/* -*- Mode: C;-*-
*
* This file is part of XDelta - A binary delta generator.
*
* Copyright (C) 1997, 1998, 1999 Josh MacDonald
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Author: Josh MacDonald <jmacd@CS.Berkeley.EDU>
*
* $Id: xdeltapriv.h 1.29 Sat, 03 Apr 1999 20:09:14 -0800 jmacd $
*/
#ifndef _XDELTAPRIV_H_
#define _XDELTAPRIV_H_
#if 0
#define DEBUG_CKSUM_UPDATE
#define DEBUG_MATCH_PRINT
#define DEBUG_CKSUM
#define DEBUG_HASH
#define DEBUG_INST
#define CLOBBER_ALGORITHM_C
#define DEBUG_MD5
#define DEBUG_CONT
#define DEBUG_COPY
#define DEBUG_FIND
#define DEBUG_RSYNC_REQUEST
#define DEBUG_CONT
#define DEBUG_CONT2
#define DEBUG_CHECK_CONTROL
#endif
typedef struct _XdeltaPos XdeltaPos;
typedef struct _RsyncHash RsyncHash;
#define XPOS(p) (((p).page * (p).page_size) + (p).off)
struct _XdeltaPos {
guint page;
guint page_size;
guint off;
const guint8* mem;
guint mem_page;
guint mem_rem;
};
#define handle_length(x) ((* (x)->table->table_handle_length) (x))
#define handle_pages(x) ((* (x)->table->table_handle_pages) (x))
#define handle_pagesize(x) ((* (x)->table->table_handle_pagesize) (x))
#define handle_map_page(x,y,z) ((* (x)->table->table_handle_map_page) ((x),(y),(z)))
#define handle_unmap_page(x,y,z) ((* (x)->table->table_handle_unmap_page) ((x),(y),(z)))
#define handle_checksum_md5(x) ((* (x)->table->table_handle_checksum_md5) (x))
#define handle_close(x,y) ((* (x)->table->table_handle_close) ((x), (y)))
#define handle_write(x,y,z) ((* (x)->table->table_handle_write) ((x),(y),(z)))
#define handle_copy(x,y,z,a) ((* (x)->table->table_handle_copy) ((x),(y),(z),(a)))
struct _XdeltaGenerator
{
GPtrArray *sources;
const guint32 *table;
guint table_size;
guint to_output_pos;
guint data_output_pos;
XdeltaOutStream *data_out;
XdeltaOutStream *control_out;
XdeltaControl *control;
XdeltaSource *data_source;
#ifdef DEBUG_HASH
gint hash_conflicts; /* bucket already used. */
gint hash_real_conflicts; /* bucket had different checksum. */
gint hash_real_real_conflicts; /* bucket had same checksum, different region */
gint hash_fill;
gint hash_entries;
#endif
EdsioMD5Ctx ctx;
};
struct _XdeltaSource
{
XdeltaStream *source_in;
XdeltaPos source_pos;
gint ck_count; /* number of elts in cksums. */
const XdeltaChecksum *cksums; /* array of cksums. */
const char *name;
XdeltaStream *index_in;
XdeltaOutStream *index_out;
gint source_index;
gboolean used;
gboolean sequential;
guint32 position;
};
#define CHEW(x) (single_hash[(guint)x])
#define FLIP_FORWARD(p) if ((p).off == (p).page_size) { (p).page += 1; (p).off = 0; }
extern const guint16 single_hash[256];
void init_pos (XdeltaStream* str, XdeltaPos* pos);
gboolean unmap_page (XdeltaStream* stream, XdeltaPos* pos);
gboolean map_page (XdeltaStream* stream, XdeltaPos* pos);
gboolean check_stream_integrity (XdeltaStream* str, const guint8* md5, guint len);
XdeltaControl* control_new (void);
guint c_hash (const XdeltaChecksum* c);
#endif /* _XDELTAPRIV_H_ */
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