make critbit0_contains as pure

6 years ago · d26d50fc42
1 changed files with 8 additions and 1 deletions
--- a/critbit.h
+++ b/critbit.h
@ -5,11 +5,18 @@
 extern "C" {
 #endif

+/* for __pure__ if we are compiling under dietlibc */
+#include <stddef.h>
+
+#ifndef __pure__
+#define __pure__
+#endif
+
 typedef struct {
  void *root;
 } critbit0_tree;

-int critbit0_contains(critbit0_tree *t, const char *u);
+int critbit0_contains(critbit0_tree *t, const char *u) __pure__;
 int critbit0_insert(critbit0_tree *t, const char *u);
 int critbit0_delete(critbit0_tree *t, const char *u);
 void critbit0_clear(critbit0_tree *t);