get_dword_bits added.

FossilOrigin-Name: 354080d0831ac0c2a9cac1d4658574d630f916181fd794bdf969ed58efe86e7a
2014-08-17 16:38:29 +00:00 · 2014-08-17 16:38:29 +00:00 · 8efdef045d
parent c5855d946c
commit 8efdef045d
1 changed files with 6 additions and 0 deletions
--- a/src/capwap/cw_util.h
+++ b/src/capwap/cw_util.h
@ -34,3 +34,9 @@ extern int cw_is_printable(const uint8_t * s,int len);

 #define cw_timer_start(t) (time(NULL)+t)
 #define cw_timer_timeout(t) (time(NULL)>t ? 1 : 0)
+
+
+/* generic macroto to isolate bits from a dword */
+#define cw_get_dword_bits(src,start,len) ((~(0xFFFFFFFF<<len)) & (src >> (32 - start - len)))
+
+