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shared: add NM_DECIMAL_STR_MAX() macro

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This commit is contained in:
Thomas Haller 2016-10-08 19:16:27 +02:00
parent c5f4e36fd9
commit 9ff1fa4ae1
1 changed files with 14 additions and 0 deletions
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14
shared/nm-utils/nm-macros-internal.h
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@ -615,6 +615,20 @@ nm_decode_version (guint version, guint *major, guint *minor, guint *micro) {
}
/*****************************************************************************/
/* taken from systemd's DECIMAL_STR_MAX()
*
* Returns the number of chars needed to format variables of the
* specified type as a decimal string. Adds in extra space for a
* negative '-' prefix (hence works correctly on signed
* types). Includes space for the trailing NUL. */
#define NM_DECIMAL_STR_MAX(type) \
(2+(sizeof(type) <= 1 ? 3 : \
sizeof(type) <= 2 ? 5 : \
sizeof(type) <= 4 ? 10 : \
sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
/*****************************************************************************/
/* if @str is NULL, return "(null)". Otherwise, allocate a buffer using
* alloca() of size @bufsize and fill it with @str. @str will be quoted with
* single quote, and in case @str is too long, the final quote will be '^'. */