Added Retrieval (data management) functions en masse.

[yaz-moved-to-github.git] / retrieval / d1_doespec.c

diff --git a/retrieval/d1_doespec.c b/retrieval/d1_doespec.c
new file mode 100644 (file)
index 0000000..bc16d07
--- /dev/null
+++ b/retrieval/d1_doespec.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 1995, Index Data.
+ * See the file LICENSE for details.
+ * Sebastian Hammer, Adam Dickmeiss
+ *
+ * $Log: d1_doespec.c,v $
+ * Revision 1.1  1995-11-01 11:56:07  quinn
+ * Added Retrieval (data management) functions en masse.
+ *
+ *
+ */
+
+
+#include <assert.h>
+#include <log.h>
+#include <proto.h>
+#include "data1.h"
+
+static int match_children(data1_node *n, Z_ETagUnit **t, int num);
+
+static int match_children_wildpath(data1_node *n, Z_ETagUnit **t, int num)
+{return 0;}
+
+static int match_children_here(data1_node *n, Z_ETagUnit **t, int num)
+{
+    int counter = 0, hits = 0;
+    data1_node *c;
+    Z_ETagUnit *tp = *t;
+    Z_Occurrences *occur;
+
+    for (c = n->child; c ; c = c->next)
+    {
+       data1_tag *tag = 0;
+
+       if (c->which != DATA1N_tag)
+           return 0;
+
+       if (tp->which == Z_ETagUnit_specificTag)
+       {
+           Z_SpecificTag *want = tp->u.specificTag;
+           occur = want->occurrences;
+           if (c->u.tag.element)
+               tag = c->u.tag.element->tag;
+           if (*want->tagType != (tag ? tag->tagset->type : 3))
+               continue;
+           if (want->tagValue->which == Z_StringOrNumeric_numeric)
+           {
+               if (!tag || tag->which != DATA1T_numeric)
+                   continue;
+               if (*want->tagValue->u.numeric != tag->value.numeric)
+                   continue;
+           }
+           else
+           {
+               assert(want->tagValue->which == Z_StringOrNumeric_string);
+               if (tag && tag->which != DATA1T_string)
+                   continue;
+               if (data1_matchstr(want->tagValue->u.string,
+                   tag ? tag->value.string : c->u.tag.tag))
+                   continue;
+           }
+       }
+       else
+           occur = tp->u.wildThing;
+
+       /*
+        * Ok, so we have a matching tag. Are we within occurrences-range?
+        */
+       counter++;
+       if (occur && occur->which == Z_Occurrences_last)
+       {
+           logf(LOG_WARN, "Can't do occurrences=last (yet)");
+           return 0;
+       }
+       if (!occur || occur->which == Z_Occurrences_all ||
+           (occur->which == Z_Occurrences_values && counter >=
+           *occur->u.values->start))
+       {
+           if (match_children(c, t + 1, num - 1))
+           {
+               c->u.tag.node_selected = 1;
+               hits++;
+               /*
+                * have we looked at enough children?
+                */
+               if (!occur || (occur->which == Z_Occurrences_values &&
+                   counter - *occur->u.values->start >=
+                   *occur->u.values->howMany - 1))
+                   return hits;
+           }
+       }
+    }
+    return hits;
+}
+
+static void mark_children(data1_node *n)
+{
+    data1_node *c;
+
+    for (c = n->child; c; c = c->next)
+    {
+       if (c->which != DATA1N_tag)
+           continue;
+       c->u.tag.node_selected = 1;
+       mark_children(c);
+    }
+}
+
+static int match_children(data1_node *n, Z_ETagUnit **t, int num)
+{
+    if (!num)
+    {
+       mark_children(n); /* Here there shall be variants, like, dude */
+       return 1;
+    }
+    switch (t[0]->which)
+    {
+       case Z_ETagUnit_wildThing:
+       case Z_ETagUnit_specificTag: return match_children_here(n, t, num);
+       case Z_ETagUnit_wildPath: return match_children_wildpath(n, t, num);
+       default:
+           abort();
+    }
+}
+
+int data1_doespec1(data1_node *n, Z_Espec1 *e)
+{
+    int i;
+
+    for (i = 0; i < e->num_elements; i++)
+       match_children(n,  e->elements[i]->u.simpleElement->path->tags,
+           e->elements[i]->u.simpleElement->path->num_tags);
+    return 0;
+}