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shared: add _NM_INT_NOT_NEGATIVE() helper

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This commit is contained in:
Thomas Haller 2018-08-31 08:45:03 +02:00
parent 5bb8e2fa4d
commit 4c4c85eab0
1 changed files with 19 additions and 0 deletions
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19
shared/nm-utils/nm-shared-utils.h
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@ -26,6 +26,25 @@
/*****************************************************************************/
static inline gboolean
_NM_INT_NOT_NEGATIVE (gssize val)
{
/* whether an enum (without negative values) is a signed int, depends on compiler options
* and compiler implementation.
*
* When using such an enum for accessing an array, one naturally wants to check
* that the enum is not negative. However, the compiler doesn't like a plain
* comparisong "enum_val >= 0", because (if the enum is unsigned), it will warn
* that the expression is always true *duh*. Not even a cast to a signed
* type helps to avoid the compiler warning in any case.
*
* The sole purpose of this function is to avoid a compiler warning, when checking
* that an enum is not negative. */
return val >= 0;
}
/*****************************************************************************/
static inline char
nm_utils_addr_family_to_char (int addr_family)
{