X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Ftype-props.h;h=8c83ea6fc37d6c77e41555f7c79c409b542fbcc7;hb=28c5588e8e1a8d091c5d2275232c35f2968a97fa;hp=efaf4a5de48c649d7872663ce6809c04aa832111;hpb=a14bc59fb8f27db193d74662dc9c5cb8237177ef;p=sliver-openvswitch.git

diff --git a/lib/type-props.h b/lib/type-props.h
index efaf4a5de..8c83ea6fc 100644
--- a/lib/type-props.h
+++ b/lib/type-props.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 Nicira Networks.
+ * Copyright (c) 2008, 2011 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@
 #include <limits.h>
 
 #define TYPE_IS_INTEGER(TYPE) ((TYPE) 1.5 == (TYPE) 1)
-#define TYPE_IS_SIGNED(TYPE) ((TYPE) 0 > (TYPE) -1)
+#define TYPE_IS_SIGNED(TYPE) ((TYPE) 1 > (TYPE) -1)
 #define TYPE_VALUE_BITS(TYPE) (sizeof(TYPE) * CHAR_BIT - TYPE_IS_SIGNED(TYPE))
 #define TYPE_MINIMUM(TYPE) (TYPE_IS_SIGNED(TYPE) \
                             ? ~(TYPE)0 << TYPE_VALUE_BITS(TYPE) \
@@ -29,4 +29,11 @@
                             ? ~(~(TYPE)0 << TYPE_VALUE_BITS(TYPE)) \
                             : (TYPE)-1)
 
+/* Number of decimal digits required to format an integer of the given TYPE.
+ * Includes space for a sign, if TYPE is signed, but not for a null
+ * terminator.
+ *
+ * The value is an overestimate. */
+#define INT_STRLEN(TYPE) (TYPE_IS_SIGNED(TYPE) + TYPE_VALUE_BITS(TYPE) / 3 + 1)
+
 #endif /* type-props.h */