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utils: add macro __LXC_NUMSTRLEN

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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>
This commit is contained in:
Christian Brauner 2016-11-27 23:41:06 +01:00
parent 1fbb7fae52
commit b07511df5c
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1 changed files with 4 additions and 0 deletions
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src/lxc/utils.h
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@ -35,6 +35,10 @@
#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, const char *exclude);
extern int get_u16(unsigned short *val, const char *arg, int base);