Changed functions isc_getmethod, isams_getmethod.

[idzebra-moved-to-github.git] / index / kcompare.c

diff --git a/index/kcompare.c b/index/kcompare.c
index 388d473..ec85430 100644 (file)
--- a/index/kcompare.c
+++ b/index/kcompare.c
@@ -1,10 +1,54 @@
 /*
- * Copyright (C) 1994-1996, Index Data I/S 
+ * Copyright (C) 1994-1999, Index Data
  * All rights reserved.
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: kcompare.c,v $
- * Revision 1.20  1996-12-23 15:30:44  adam
+ * Revision 1.33  1999-07-14 10:59:26  adam
+ * Changed functions isc_getmethod, isams_getmethod.
+ * Improved fatal error handling (such as missing EXPLAIN schema).
+ *
+ * Revision 1.32  1999/07/13 13:21:15  heikki
+ * Managing negative deltas
+ *
+ * Revision 1.31  1999/07/06 09:37:04  heikki
+ * Working on isamh - not ready yet.
+ *
+ * Revision 1.30  1999/06/30 15:07:23  heikki
+ * Adding isamh stuff
+ *
+ * Revision 1.29  1999/06/30 09:08:23  adam
+ * Added coder to reset.
+ *
+ * Revision 1.28  1999/05/26 07:49:13  adam
+ * C++ compilation.
+ *
+ * Revision 1.27  1999/05/12 13:08:06  adam
+ * First version of ISAMS.
+ *
+ * Revision 1.26  1999/02/02 14:50:54  adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.25  1998/06/08 15:26:06  adam
+ * Minor changes.
+ *
+ * Revision 1.24  1998/06/08 14:43:12  adam
+ * Added suport for EXPLAIN Proxy servers - added settings databasePath
+ * and explainDatabase to facilitate this. Increased maximum number
+ * of databases and attributes in one register.
+ *
+ * Revision 1.23  1998/03/05 08:45:12  adam
+ * New result set model and modular ranking system. Moved towards
+ * descent server API. System information stored as "SGML" records.
+ *
+ * Revision 1.22  1997/09/22 12:39:06  adam
+ * Added get_pos method for the ranked result sets.
+ *
+ * Revision 1.21  1997/09/17 12:19:13  adam
+ * Zebra version corresponds to YAZ version 1.4.
+ * Changed Zebra server so that it doesn't depend on global common_resource.
+ *
+ * Revision 1.20  1996/12/23 15:30:44  adam
  * Work on truncation.
  * Bug fix: result sets weren't deleted after server shut down.
  *
@@ -145,18 +189,33 @@ int key_qsort_compare (const void *p1, const void *p2)
     return cp1[l] - cp2[l];
 }
 
+int key_get_pos (const void *p)
+{
+    struct it_key key;
+    memcpy (&key, p, sizeof(key));
+    return key.seqno;
+}
+
 struct iscz1_code_info {
     struct it_key key;
 };
 
 static void *iscz1_code_start (int mode)
 {
-    struct iscz1_code_info *p = xmalloc (sizeof(*p));
+    struct iscz1_code_info *p = (struct iscz1_code_info *)
+       xmalloc (sizeof(*p));
     p->key.sysno = 0;
     p->key.seqno = 0;
     return p;
 }
 
+static void iscz1_code_reset (void *vp)
+{
+    struct iscz1_code_info *p = (struct iscz1_code_info *) vp;
+    p->key.sysno = 0;
+    p->key.seqno = 0;
+}
+
 static void iscz1_code_stop (int mode, void *p)
 {
     xfree (p);
@@ -170,18 +229,18 @@ void iscz1_encode_int (unsigned d, char **dst)
         *bp++ = d;
     else if (d <= 16383)
     {
-        *bp++ = 64 + (d>>8);
+        *bp++ = 64 | (d>>8);
        *bp++ = d & 255;
     }
     else if (d <= 4194303)
     {
-        *bp++ = 128 + (d>>16);
+        *bp++ = 128 | (d>>16);
         *bp++ = (d>>8) & 255;
         *bp++ = d & 255;
     }
     else
     {
-        *bp++ = 192 + (d>>24);
+        *bp++ = 192 | (d>>24);
         *bp++ = (d>>16) & 255;
         *bp++ = (d>>8) & 255;
         *bp++ = d & 255;
@@ -203,15 +262,19 @@ int iscz1_decode_int (unsigned char **src)
         c = (c << 8) + *(*src)++;
         return c;
     }
-    c = ((c & 63) << 8) + *(*src)++;
+    if (c&32) /* expand sign bit to high bits */
+       c = ((c | 63) << 8) + *(*src)++;
+    else
+       c = ((c & 63) << 8) + *(*src)++;
     c = (c << 8) + *(*src)++;
     c = (c << 8) + *(*src)++;
+    
     return c;
 }
 
 static void iscz1_code_item (int mode, void *vp, char **dst, char **src)
 {
-    struct iscz1_code_info *p = vp;
+    struct iscz1_code_info *p = (struct iscz1_code_info *) vp;
     struct it_key tkey;
     int d;
 
@@ -248,24 +311,69 @@ static void iscz1_code_item (int mode, void *vp, char **dst, char **src)
     }
 }
 
-ISAMC_M key_isamc_m (void)
+ISAMC_M key_isamc_m (Res res, ISAMC_M me)
 {
-    static ISAMC_M me = NULL;
+    isc_getmethod (me);
+
+    me->compare_item = key_compare;
+
+    me->code_start = iscz1_code_start;
+    me->code_item = iscz1_code_item;
+    me->code_stop = iscz1_code_stop;
+    me->code_reset = iscz1_code_reset;
+
+    me->debug = atoi(res_get_def (res, "isamcDebug", "0"));
+
+    return me;
+}
+
+ISAMS_M key_isams_m (Res res, ISAMS_M me)
+{
+    isams_getmethod (me);
+
+    me->compare_item = key_compare;
+
+    me->code_start = iscz1_code_start;
+    me->code_item = iscz1_code_item;
+    me->code_stop = iscz1_code_stop;
+
+    me->debug = atoi(res_get_def (res, "isamsDebug", "0"));
+
+    return me;
+}
+
+ISAMH_M key_isamh_m (Res res)
+{
+    static ISAMH_M me = NULL;
 
     if (me)
         return me;
 
-    me = isc_getmethod ();
+    me = isamh_getmethod ();
 
     me->compare_item = key_compare;
 
     me->code_start = iscz1_code_start;
     me->code_item = iscz1_code_item;
     me->code_stop = iscz1_code_stop;
+    me->code_reset = iscz1_code_reset;
 
-    me->debug = atoi(res_get_def (common_resource, "isamcDebug", "0"));
+    me->debug = atoi(res_get_def (res, "isamhDebug", "9"));
 
-    logf (LOG_LOG, "ISAMC system active");
     return me;
 }
 
+
+int key_SU_code (int ch, char *out)
+{
+    int i;
+    for (i = 0; ch; i++)
+    {
+       if (ch > 63)
+           out[i] = 128 + (ch & 63);
+       else
+           out[i] = 1 + ch;
+       ch = ch >> 6;
+    }
+    return i;
+}