Imported Upstream version 1.1.4upstream/1.1.4

1 files changed, 131 insertions, 0 deletions

diff --git a/xdeltapriv.h b/xdeltapriv.h
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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_ */