From 6b74708f98852f738fecb8a737a9640edf3d427e Mon Sep 17 00:00:00 2001
From: Adam Dickmeiss <adam@indexdata.dk>
Date: Tue, 14 Feb 1995 14:12:41 +0000
Subject: [PATCH] Ranges for ordered qualfiers implemented (e.g.
 pd=1980-1990).

---
 ccl/cclfind.c |   54 ++++++++++++++++++++++++++++++++++++++++++++++++------
 ccl/cclsh.c   |    7 +++++--
 2 files changed, 53 insertions(+), 8 deletions(-)

diff --git a/ccl/cclfind.c b/ccl/cclfind.c
index 148b002..76556a1 100644
--- a/ccl/cclfind.c
+++ b/ccl/cclfind.c
@@ -2,7 +2,10 @@
  * Europagate, 1995
  *
  * $Log: cclfind.c,v $
- * Revision 1.4  1995/02/14 13:16:29  adam
+ * Revision 1.5  1995/02/14 14:12:41  adam
+ * Ranges for ordered qualfiers implemented (e.g. pd=1980-1990).
+ *
+ * Revision 1.4  1995/02/14  13:16:29  adam
  * Left and/or right truncation implemented.
  *
  * Revision 1.3  1995/02/14  10:25:56  adam
@@ -289,11 +292,50 @@ static struct ccl_rpn_node *qualifiers (struct ccl_token *la,
     {
         struct ccl_rpn_node *p;
 
-        ADVANCE;
-        p = search_term (ap);
-        add_attr (p, CCL_BIB1_REL, rel);
-        free (ap);
-        return p;
+        ADVANCE;                      /* skip relation */
+        if (KIND == CCL_TOK_TERM)
+        {
+            struct ccl_rpn_node *p1;
+            p1 = search_term (ap);
+            if (KIND == CCL_TOK_MINUS)
+            {
+                ADVANCE;                   /* skip '-' */
+                if (KIND == CCL_TOK_TERM)  /* = term - term  ? */
+                {
+                    struct ccl_rpn_node *p2;
+                    
+                    p2 = search_term (ap);
+                    p = mk_node (AND);
+                    p->u.p[0] = p1;
+                    add_attr (p1, CCL_BIB1_REL, 4);
+                    p->u.p[1] = p2;
+                    add_attr (p2, CCL_BIB1_REL, 2);
+                    free (ap);
+                    return p;
+                }
+                else                       /* = term -    */
+                {
+                    add_attr (p1, CCL_BIB1_REL, 4);
+                    free (ap);
+                    return p1;
+                }
+            }
+            else
+            {
+                add_attr (p1, CCL_BIB1_REL, rel);
+                free (ap);
+                return p1;
+            }
+        }
+        else if (KIND == CCL_TOK_MINUS)   /* = - term  ? */
+        {
+            ADVANCE;
+            p = search_term (ap);
+            add_attr (p, CCL_BIB1_REL, 2);
+            free (ap);
+            return p;
+        }
+        ccl_error = CCL_ERR_TERM_EXPECTED;
     }
     free (ap);
     return NULL;
diff --git a/ccl/cclsh.c b/ccl/cclsh.c
index 5c3d290..51754ec 100644
--- a/ccl/cclsh.c
+++ b/ccl/cclsh.c
@@ -2,7 +2,10 @@
  * Europagate 1995
  *
  * $Log: cclsh.c,v $
- * Revision 1.3  1995/02/14 10:25:57  adam
+ * Revision 1.4  1995/02/14 14:12:42  adam
+ * Ranges for ordered qualfiers implemented (e.g. pd=1980-1990).
+ *
+ * Revision 1.3  1995/02/14  10:25:57  adam
  * The constructions 'qualifier rel term ...' implemented.
  *
  * Revision 1.2  1995/02/13  15:15:07  adam
@@ -23,7 +26,7 @@ static int debug = 0;
 static char *prog;
 
 static int ti_attr[] = {
-    CCL_BIB1_USE, 5,
+    CCL_BIB1_USE, 4,
     CCL_BIB1_STR, CCL_BIB1_STR_WP
 };
 
-- 
1.7.10.4