1 files changed, 27 insertions, 0 deletions
diff --git a/src/bsr.c b/src/bsr.c
index bd0a84c..c034072 100644
--- a/src/bsr.c
+++ b/src/bsr.c
@@ -474,6 +474,33 @@ bsr_find(CCR_MOD(bsr *) b, CCR_MOD(Grammar *) g,
   return result;
 }
 
+ht *
+bsr_lookup(CCR_MOD(bsr *) b, BOOL * const restrict errorp,
+           NUM X, NUM i, NUM j)
+{
+  *errorp = 0;
+  ht *result = NULL;
+
+  if (X < 0 || X >= b->f.len) {
+    fleprintf("Invalid X: %ld\n", X);
+    goto cleanup;
+  }
+
+  if (!((b->f.array+X)->initialized)) goto success;
+
+  pair2 p2 = (pair2) { .x = i, .y = j };
+
+  result = (ht *) ht_find((b->f.array+X)->table, &p2);
+
+  goto success;
+
+ cleanup:
+  *errorp = 1;
+
+ success:
+  return result;
+}
+
 static void
 print_sep()
 {