1 files changed, 28 insertions, 0 deletions
diff --git a/user/include/stddef.h b/user/include/stddef.h
new file mode 100644
index 0000000..39b5af5
--- /dev/null
+++ b/user/include/stddef.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include "sys/types.h"
+
+#define inline __attribute__((always_inline, used))
+
+#define offsetof(type, member) \
+    ((uintptr_t)((char *)&((type *)(0))->member - (char *)0))
+
+#ifndef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+#define CONTAINER_OF(obj, type, member) \
+    ((type *)((char *)(obj)-offsetof(type, member)))
+
+/* This truly atrocious macro hack taken from the wikipedia article on the C
+ * preprocessor, use to "quote" the value (or name) of another macro:
+ * QUOTE_BY_NAME(NTERMS) -> "NTERMS"
+ * QUOTE(NTERMS) -> "3"
+ */
+#define QUOTE_BY_NAME(x) #x
+#define QUOTE_BY_VALUE(x) QUOTE_BY_NAME(x)
+/* By default, we quote by value */
+#define QUOTE(x) QUOTE_BY_NAME(x)