1 files changed, 4 insertions, 2 deletions
diff --git a/src/util.h b/src/util.h
index 32555ce..73346a3 100644
--- a/src/util.h
+++ b/src/util.h
@@ -11,10 +11,12 @@
 #define MIN(x,y)    ((x) > (y) ? (y) : (x))
 #define MAX(x,y)    ((x) < (y) ? (y) : (x))
 
+#define PRINTABLE(c) ((c) >= 32 ? (c) : ' ')
+
 #define ERR(...) fprintf(stderr, "ERR: " __VA_ARGS__)
 
-#define NFREE(p) do { free(p); p = NULL; } while (0)
-#define NFCLOSE(f) do { fclose(f); f = NULL; } while (0)
+#define FREE(p) do { free(p); p = NULL; } while (0)
+#define FCLOSE(f) do { if (f) fclose(f); f = NULL; } while (0)
 
 #define MHASHLEN 40