From 73702f59d5e5e7d900d288a3848bfd1c72838a7e Mon Sep 17 00:00:00 2001
From: Florian Forster <ff@octo.it>
Date: Mon, 12 Jul 2010 18:58:30 +0200
Subject: [PATCH] src/graph.[ch]: Implement "graph_ident_intersect".

---
 src/graph.c | 11 +++++++++++
 src/graph.h |  6 ++++++
 2 files changed, 17 insertions(+)

diff --git a/src/graph.c b/src/graph.c
index c6fb444..2c1afc8 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -318,6 +318,17 @@ _Bool graph_matches_ident (graph_config_t *cfg, /* {{{ */
   return (ident_matches (selector, cfg->select));
 } /* }}} _Bool graph_matches_ident */
 
+_Bool graph_ident_intersect (graph_config_t *cfg, /* {{{ */
+    const graph_ident_t *selector)
+{
+#if C4_DEBUG
+  if ((cfg == NULL) || (selector == NULL))
+    return (0);
+#endif
+
+  return (ident_intersect (cfg->select, selector));
+} /* }}} _Bool graph_ident_intersect */
+
 _Bool graph_matches_field (graph_config_t *cfg, /* {{{ */
     graph_ident_field_t field, const char *field_value)
 {
diff --git a/src/graph.h b/src/graph.h
index b7a7a89..7dca2ce 100644
--- a/src/graph.h
+++ b/src/graph.h
@@ -62,6 +62,12 @@ _Bool graph_ident_matches (graph_config_t *cfg, const graph_ident_t *ident);
 _Bool graph_matches_ident (graph_config_t *cfg,
     const graph_ident_t *selector);
 
+/* Returns true if a file may apply to both, the graphs selector and the
+ * selector given as argument. If the selectors contradict one another,
+ * returns false. */
+_Bool graph_ident_intersect (graph_config_t *cfg,
+    const graph_ident_t *selector);
+
 /* Compares the given string with the appropriate field of the selector. If
  * the selector field is "/all/" or "/any/", returns true without checking the
  * instances. See "graph_inst_search_field" for finding all matching
-- 
2.11.0