*** empty log message ***

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

diff --git a/index/kcompare.c b/index/kcompare.c
index 7ce3a24..878f491 100644 (file)
--- a/index/kcompare.c
+++ b/index/kcompare.c
@@ -4,7 +4,51 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: kcompare.c,v $
- * Revision 1.2  1995-09-06 16:11:17  adam
+ * Revision 1.15  1995-11-20 16:59:46  adam
+ * New update method: the 'old' keys are saved for each records.
+ *
+ * Revision 1.14  1995/10/30  15:08:08  adam
+ * Bug fixes.
+ *
+ * Revision 1.13  1995/10/27  14:00:11  adam
+ * Implemented detection of database availability.
+ *
+ * Revision 1.12  1995/10/17  18:02:08  adam
+ * New feature: databases. Implemented as prefix to words in dictionary.
+ *
+ * Revision 1.11  1995/10/06  16:33:37  adam
+ * Use attribute mappings.
+ *
+ * Revision 1.10  1995/09/29  14:01:41  adam
+ * Bug fixes.
+ *
+ * Revision 1.9  1995/09/28  12:10:32  adam
+ * Bug fixes. Field prefix used in queries.
+ *
+ * Revision 1.8  1995/09/28  09:19:42  adam
+ * xfree/xmalloc used everywhere.
+ * Extract/retrieve method seems to work for text records.
+ *
+ * Revision 1.7  1995/09/27  12:22:28  adam
+ * More work on extract in record control.
+ * Field name is not in isam keys but in prefix in dictionary words.
+ *
+ * Revision 1.6  1995/09/14  07:48:23  adam
+ * Record control management.
+ *
+ * Revision 1.5  1995/09/11  13:09:34  adam
+ * More work on relevance feedback.
+ *
+ * Revision 1.4  1995/09/08  14:52:27  adam
+ * Minor changes. Dictionary is lower case now.
+ *
+ * Revision 1.3  1995/09/07  13:58:36  adam
+ * New parameter: result-set file descriptor (RSFD) to support multiple
+ * positions within the same result-set.
+ * Boolean operators: and, or, not implemented.
+ * Result-set references.
+ *
+ * Revision 1.2  1995/09/06  16:11:17  adam
  * Option: only one word key per file.
  *
  * Revision 1.1  1995/09/04  09:10:36  adam
@@ -17,36 +61,80 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#include <ctype.h>
 #include <assert.h>
 
 #include "index.h"
 
+void key_logdump (int logmask, const void *p)
+{
+    struct it_key key;
+
+    memcpy (&key, p, sizeof(key));
+    logf (logmask, "%7d s=%-4d", key.sysno, key.seqno);
+}
+
 int key_compare (const void *p1, const void *p2)
 {
     struct it_key i1, i2;
     memcpy (&i1, p1, sizeof(i1));
     memcpy (&i2, p2, sizeof(i2));
-    if ( i1.sysno != i2.sysno)
-        return i1.sysno - i2.sysno;
-#if IT_KEY_HAVE_FIELD
-    if ( i1.seqno != i2.seqno)
-        return i1.seqno - i2.seqno;
-    return i1.field - i2.field;
+    if (i1.sysno != i2.sysno)
+    {
+        if (i1.sysno > i2.sysno)
+            return 2;
+        else
+            return -2;
+    }
+#if IT_KEY_HAVE_SEQNO
+    if (i1.seqno != i2.seqno)
+    {
+        if (i1.seqno > i2.seqno)
+            return 1;
+        else
+            return -1;
+    }
 #else
-    return i1.seqno - i2.seqno;
+    if (i1.freq != i2.freq)
+    {
+        if (i1.freq > i2.freq)
+            return 1;
+        else
+            return -1;
+    }
 #endif
+    return 0;
 }
 
-int key_compare_x (const struct it_key *i1, const struct it_key *i2)
+int key_qsort_compare (const void *p1, const void *p2)
 {
-    if ( i1->sysno != i2->sysno)
-        return i1->sysno - i2->sysno;
-#if IT_KEY_HAVE_FIELD
-    if ( i1->seqno != i2->seqno)
-        return i1->seqno - i2->seqno;
-    return i1->field - i2->field;
-#else
-    return i1->seqno - i2->seqno;
-#endif
+    int r;
+    size_t l;
+    char *cp1 = *(char **) p1;
+    char *cp2 = *(char **) p2;
+ 
+    if ((r = strcmp (cp1, cp2)))
+        return r;
+    l = strlen(cp1)+1;
+    if ((r = key_compare (cp1+l+1, cp2+l+1)))
+        return r;
+    return cp1[l] - cp2[l];
+}
+
+int index_char_cvt (int c)
+{
+    return tolower (c);
+}
+
+int index_word_prefix (char *string, int attset_ordinal,
+                       int local_attribute,
+                       const char *databaseName)
+{
+    int i;
+    sprintf (string, "%s@%c%04d", databaseName,
+             attset_ordinal + '0', local_attribute);
+    for (i = 0; string[i]; i++)
+        string[i] = index_char_cvt (string[i]);
+    return i;
 }