New helper macro: ALIGN()

[wimlib] / include / wimlib / util.h

diff --git a/include/wimlib/util.h b/include/wimlib/util.h
index 7f34cbf39721f0a6e411595f568474bf5db5f6c9..c3bac7abe46be8d0c55f105989f318860e78dd8a 100644 (file)
--- a/include/wimlib/util.h
+++ b/include/wimlib/util.h
@@ -24,6 +24,10 @@
 /* Get the number of elements of an array type.  */
 #define ARRAY_LEN(array)       (sizeof(array) / sizeof((array)[0]))
 
+/* Round 'v' up to the next 'alignment'-byte aligned boundary.  'alignment' must
+ * be a power of 2.  */
+#define ALIGN(v, alignment)    (((v) + ((alignment) - 1)) & ~((alignment) - 1))
+
 /* Maximum number of bytes that can be allocated on the stack.
  *
  * Note: this isn't a hard bound on the stack space used, since this is just for