move ARRAY_SIZE macro to types.h

[openocd.git] / src / helper / types.h

diff --git a/src/helper/types.h b/src/helper/types.h
index 8f6283b57bdd8878a8c4b5dfddfb6e45568f6f17..96a923b81fee6a0f858575a79b8d5e7b145bbe35 100644 (file)
--- a/src/helper/types.h
+++ b/src/helper/types.h
@@ -60,6 +60,16 @@ typedef bool _Bool;
 #define __stringify(s) #s
 
 
+/**
+ * Compute the number of elements of a variable length array.
+ * <code>
+ * const char *strs[] = { "a", "b", "c" };
+ * unsigned num_strs = ARRAY_SIZE(strs);
+ * </code>
+ */
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
+
+
 /**
  * Cast a member of a structure out to the containing structure.
  * @param ptr The pointer to the member.