From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sun, 27 Nov 2016 22:41:06 +0000 (+0100)
Subject: utils: add macro __LXC_NUMSTRLEN
X-Git-Tag: lxc-1.0.10~38
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fb00d120e6a93b66c071cb5e9bca55bbfd45452b;p=thirdparty%2Flxc.git

utils: add macro __LXC_NUMSTRLEN

This macro can be used to set or allocate a string buffer that can hold any
64bit representable number.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/utils.h b/src/lxc/utils.h
index 6ce68954e..9cb99cd57 100644
--- a/src/lxc/utils.h
+++ b/src/lxc/utils.h
@@ -34,6 +34,10 @@
 #include "config.h"
 #include "initutils.h"
 
+/* Useful macros */
+/* Maximum number for 64 bit integer is a string with 21 digits: 2^64 - 1 = 21 */
+#define __LXC_NUMSTRLEN 21
+
 /* returns 1 on success, 0 if there were any failures */
 extern int lxc_rmdir_onedev(char *path);
 extern int get_u16(unsigned short *val, const char *arg, int base);