From: Adam Dickmeiss <adam@indexdata.dk>
Date: Tue, 14 Feb 1995 13:16:29 +0000 (+0000)
Subject: Left and/or right truncation implemented.
X-Git-Url: http://lists.indexdata.com/cgi-bin?a=commitdiff_plain;h=44a221cc2f0f282514666d7b07d7b4e24870ee98;p=egate.git

Left and/or right truncation implemented.
---

diff --git a/ccl/cclfind.c b/ccl/cclfind.c
index 0d2c65f..148b002 100644
--- a/ccl/cclfind.c
+++ b/ccl/cclfind.c
@@ -2,7 +2,10 @@
  * Europagate, 1995
  *
  * $Log: cclfind.c,v $
- * Revision 1.3  1995/02/14 10:25:56  adam
+ * 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
  * The constructions 'qualifier rel term ...' implemented.
  *
  * Revision 1.2  1995/02/13  15:15:07  adam
@@ -28,12 +31,12 @@ static CCL_bibset bibset;
 #define ADVANCE look_token = look_token->next
 #define ADVX(x) x=(x)->next
 
-static int *qual_val (struct ccl_rpn_attr *list, int type)
+static struct ccl_rpn_attr *qual_val (struct ccl_rpn_attr *list, int type)
 {
     while (list)
     {
         if (list->type == type)
-            return &list->value;
+            return list;
         list = list->next;
     }
     return NULL;
@@ -118,36 +121,58 @@ static struct ccl_rpn_node *search_term (struct ccl_rpn_attr **qa)
     struct ccl_rpn_node *p;
     struct ccl_token *lookahead = look_token;
     int len = 0;
-    int no = 0;
+    int no, i;
+    int left_trunc = 0;
+    int right_trunc = 0;
+    int mid_trunc = 0;
 
     if (KIND != CCL_TOK_TERM)
     {
         ccl_error = CCL_ERR_TERM_EXPECTED;
         return NULL;
     }
-    while (lookahead->kind == CCL_TOK_TERM)
+    for (no = 0; lookahead->kind == CCL_TOK_TERM; no++)
     {
-        no++;
-	len += 1+lookahead->len;
+        for (i = 0; i<lookahead->len; i++)
+            if (lookahead->name[i] == '?')
+            {
+                if (no == 0 && i == 0 && lookahead->len >= 1)
+                    left_trunc = 1;
+                else if (lookahead->next->kind != CCL_TOK_TERM &&
+                         i == lookahead->len-1 && i >= 1)
+                    right_trunc = 1;
+                else
+                    mid_trunc = 1;
+            }
+        len += 1+lookahead->len;
 	lookahead = lookahead->next;
     }
     p = mk_node (TERM);
     p->u.t.term = malloc (len);
+    assert (p->u.t.term);
     p->u.t.attr_list = NULL;
     p->u.t.term[0] = '\0';
-    assert (p->u.t.term);
-    strxcat (p->u.t.term, look_token->name, look_token->len);
-    ADVANCE;
-    while (KIND == CCL_TOK_TERM)
+    for (i = 0; i<no; i++)
     {
-	strcat (p->u.t.term, " ");
-	strxcat (p->u.t.term, look_token->name, look_token->len);
+        const char *src_str = look_token->name;
+        int src_len = look_token->len;
+        
+        if (i == 0 && left_trunc)
+        {
+            src_len--;
+            src_str++;
+        }
+        else if (i == no-1 && right_trunc)
+            src_len--;
+        if (i)
+            strcat (p->u.t.term, " ");
+	strxcat (p->u.t.term, src_str, src_len);
 	ADVANCE;
     }
     if (qa)
     {
         int i;
-        int *intp;
+        struct ccl_rpn_attr *attr;
         for (i=0; qa[i]; i++)
         {
             struct ccl_rpn_attr *attr;
@@ -156,8 +181,8 @@ static struct ccl_rpn_node *search_term (struct ccl_rpn_attr **qa)
                 if (attr->value > 0)
                     add_attr (p, attr->type, attr->value);
         }
-        if ((intp = qual_val (qa[0], CCL_BIB1_STR)) &&
-            *intp == CCL_BIB1_STR_WP)
+        if ((attr = qual_val (qa[0], CCL_BIB1_STR)) &&
+            attr->value == CCL_BIB1_STR_WP)
         {
             if (no == 1)
                 add_attr (p, CCL_BIB1_STR, 2);
@@ -165,6 +190,12 @@ static struct ccl_rpn_node *search_term (struct ccl_rpn_attr **qa)
                 add_attr (p, CCL_BIB1_STR, 1);
         }
     }
+    if (left_trunc && right_trunc)
+        add_attr (p, CCL_BIB1_TRU, 3);
+    else if (right_trunc)
+        add_attr (p, CCL_BIB1_TRU, 1);
+    else if (left_trunc)
+        add_attr (p, CCL_BIB1_TRU, 2);
     return p;
 }
 
@@ -175,7 +206,7 @@ static struct ccl_rpn_node *qualifiers (struct ccl_token *la,
     struct ccl_rpn_attr **ap;
     int no = 1;
     int i, rel;
-    int *intp;
+    struct ccl_rpn_attr *attr;
 
     if (qa)
     {
@@ -200,7 +231,7 @@ static struct ccl_rpn_node *qualifiers (struct ccl_token *la,
             ADVANCE;
     }
     ap[i] = NULL;
-    if (! (intp = qual_val (ap[0], CCL_BIB1_REL)) || *intp == 3)
+    if (! (attr = qual_val (ap[0], CCL_BIB1_REL)) || attr->value == 3)
     {                
         /* unordered relation */
         struct ccl_rpn_node *p;