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| author | Thomas Haller <thaller@redhat.com> | 2023-03-08 14:35:04 +0100 |
|---|---|---|
| committer | Thomas Haller <thaller@redhat.com> | 2023-03-08 15:34:46 +0100 |
| commit | dc5ac4d83c3e4e0cc2f7e87936178969fc624266 (patch) | |
| tree | 2f0ee60b79c981af81c1e2f6ca413326141e59c3 | |
| parent | 17935511a571ffc9e831b629d25a5b526179f34e (diff) | |
std-aux/trivial: add code comment to NM_IS_IPv4()
| -rw-r--r-- | src/libnm-std-aux/nm-std-aux.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libnm-std-aux/nm-std-aux.h b/src/libnm-std-aux/nm-std-aux.h index a5e5abd3d5..a146487eff 100644 --- a/src/libnm-std-aux/nm-std-aux.h +++ b/src/libnm-std-aux/nm-std-aux.h @@ -1419,6 +1419,9 @@ nm_utils_addr_family_to_char(int addr_family) (NM_UNIQ_T(_addr_family, uniq) == NM_AF_INET); \ }) +/* NM_IS_IPv4() is guaranteed to give either 0 or 1! That is an important + * guarantee, because we often use that value to index a 2-array (where at + * position zero is IPv6 and at position 1 IPv4). */ #define NM_IS_IPv4(addr_family) _NM_IS_IPv4(NM_UNIQ, addr_family) static inline int |