Add libxdiff library

xdiff/xtypes.h

+/*
+ *  LibXDiff by Davide Libenzi ( File Differential Library )
+ *  Copyright (C) 2003  Davide Libenzi
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Davide Libenzi <davidel@xmailserver.org>
+ *
+ */
+
+#if !defined(XTYPES_H)
+#define XTYPES_H
+
+
+
+typedef struct s_chanode {
+        struct s_chanode *next;
+        long icurr;
+} chanode_t;
+
+typedef struct s_chastore {
+        chanode_t *head, *tail;
+        long isize, nsize;
+        chanode_t *ancur;
+        chanode_t *sncur;
+        long scurr;
+} chastore_t;
+
+typedef struct s_xrecord {
+        struct s_xrecord *next;
+        char const *ptr;
+        long size;
+        unsigned long ha;
+} xrecord_t;
+
+typedef struct s_xdfile {
+        chastore_t rcha;
+        long nrec;
+        unsigned int hbits;
+        xrecord_t **rhash;
+        long dstart, dend;
+        xrecord_t **recs;
+        char *rchg;
+        long *rindex;
+        long nreff;
+        unsigned long *ha;
+} xdfile_t;
+
+typedef struct s_xdfenv {
+        xdfile_t xdf1, xdf2;
+} xdfenv_t;
+
+
+
+#endif /* #if !defined(XTYPES_H) */