tbf: Replace static casts by calls to as_ul_tbf/as_dl_tbf
Currently casts from gprs_rlcmac_tbf to gprs_rlcmac_ul_tbf and
gprs_rlcmac_dl_tbf are done by using static_cast. This doesn't provide
protection against converting a gprs_rlcmac_ul_tbf pointer to a
gprs_rlcmac_dl_tbf pointer and vice versa.
This commit provides two functions as_ul_tbf and as_dl_tbf, that
behave similar like dynamic_cast but use the direction field instead
of RTTI.
Sponsored-by: On-Waves ehf
diff --git a/src/tbf.h b/src/tbf.h
index a3a2eeb..190101b 100644
--- a/src/tbf.h
+++ b/src/tbf.h
@@ -452,6 +452,23 @@
return (enum gprs_rlcmac_tbf_direction)
((int)GPRS_RLCMAC_UL_TBF - (int)dir + (int)GPRS_RLCMAC_DL_TBF);
}
+
+inline gprs_rlcmac_ul_tbf *as_ul_tbf(gprs_rlcmac_tbf *tbf)
+{
+ if (tbf && tbf->direction == GPRS_RLCMAC_UL_TBF)
+ return static_cast<gprs_rlcmac_ul_tbf *>(tbf);
+ else
+ return NULL;
+}
+
+inline gprs_rlcmac_dl_tbf *as_dl_tbf(gprs_rlcmac_tbf *tbf)
+{
+ if (tbf && tbf->direction == GPRS_RLCMAC_DL_TBF)
+ return static_cast<gprs_rlcmac_dl_tbf *>(tbf);
+ else
+ return NULL;
+}
+
#endif
#ifdef __cplusplus