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Diffstat (limited to 'xdeltapriv.h')
| -rwxr-xr-x | xdeltapriv.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/xdeltapriv.h b/xdeltapriv.h new file mode 100755 index 0000000..9c75f09 --- /dev/null +++ b/xdeltapriv.h @@ -0,0 +1,131 @@ +/* -*- 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_ */ |