X-Git-Url: https://git.dlugolecki.net.pl/?a=blobdiff_plain;f=gedcom%2Fxref.c;h=1aa3b6c21347685b6312ca271ac7e3f29a721103;hb=6432f3c3174135b38fc4084556cc487619510366;hp=3c33909339870d3b6d6e9cb14aa4159ac3743392;hpb=3068ed1f64a96d42cdde19cfebf1468ec9169e62;p=gedcom-parse.git

diff --git a/gedcom/xref.c b/gedcom/xref.c
index 3c33909..1aa3b6c 100644
--- a/gedcom/xref.c
+++ b/gedcom/xref.c
@@ -62,21 +62,41 @@ void xref_free(hnode_t *n, void *c __attribute__((unused)))
   free(n);
 }
 
-struct xref_node *make_xref_node()
+void clear_xref_node(struct xref_node *xr)
 {
-  struct xref_node *xr = (struct xref_node *)malloc(sizeof(struct xref_node));
   xr->xref.type    = XREF_NONE;
-  xr->xref.string  = NULL;
+  /* Make sure that the 'string' member always contains a valid string */
+  if (!xr->xref.string)
+    xr->xref.string  = strdup("");
   xr->xref.object  = NULL;
   xr->defined_type = XREF_NONE;
   xr->used_type    = XREF_NONE;
   xr->defined_line = -1;
   xr->used_line    = -1;
+}
+
+struct xref_node *make_xref_node()
+{
+  struct xref_node *xr = (struct xref_node *)malloc(sizeof(struct xref_node));
+  xr->xref.string = NULL;
+  clear_xref_node(xr);
   return xr;
 }
 
+void cleanup_xrefs()
+{
+  hash_free(xrefs);
+  xrefs = NULL;
+}
+
 void make_xref_table()
 {
+  if (xrefs)
+    cleanup_xrefs();
+  else
+    /* Only register initially (if xrefs is still NULL) */
+    /* So that it is only registered once */
+    atexit(cleanup_xrefs);
   xrefs = hash_create(HASHCOUNT_T_MAX, NULL, NULL);
   hash_set_allocator(xrefs, xref_alloc, xref_free, NULL);
 }
@@ -103,7 +123,6 @@ int check_xref_table()
     }
   }
   
-  hash_free(xrefs);
   return result;
 }
 
@@ -120,6 +139,7 @@ struct xref_value *gedcom_parse_xref(char *raw_value,
     char *key = strdup(raw_value);
     xr = make_xref_node();
     xr->xref.type = xref_type;
+    free(xr->xref.string);
     xr->xref.string = strdup(raw_value);
     hash_alloc_insert(xrefs, key, xr);
   }
@@ -140,16 +160,15 @@ struct xref_value *gedcom_parse_xref(char *raw_value,
 		   "on line %d"),
 		 xr->xref.string, xref_type_str[xr->defined_type],
 		 xr->defined_line);
-    return NULL;
-  }
-  
-  if ((ctxt == XREF_USED && xr->used_type != xref_type)
-      || (ctxt == XREF_DEFINED &&
-	  (xr->used_type != XREF_NONE && xr->used_type != xref_type))) {
+    clear_xref_node(xr);
+  }  
+  else if ((ctxt == XREF_USED && xr->used_type != xref_type)
+	   || (ctxt == XREF_DEFINED &&
+	       (xr->used_type != XREF_NONE && xr->used_type != xref_type))) {
     gedcom_error(_("Cross-reference %s previously used as pointer to %s, "
 		   "on line %d"),
 		 xr->xref.string, xref_type_str[xr->used_type], xr->used_line);
-    return NULL;
+    clear_xref_node(xr);
   }
   
   return &(xr->xref);