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authorVadim Yanitskiy <vyanitskiy@sysmocom.de>2022-10-04 02:41:13 +0700
committerVadim Yanitskiy <vyanitskiy@sysmocom.de>2022-10-04 02:49:23 +0700
commit8deedfa2818c6854f91bf37fc36c80b4b7e73914 (patch)
treea91f50d792f9327616e7c828cf2240141bd8079c /include/osmocom
parent395db204b40efdaf4e389a1a4ecc3ebd038c1198 (diff)
gsm0502: use parentheses in GSM_TDMA_FN_{SUM,SUB} macros
This makes it possible to pass expressions to the abovementioned macros without any side-effects. Strictly speaking, this is only necessary for argument 'b' of GSM_TDMA_FN_SUB, but let's also add them to GSM_TDMA_FN_SUM for consistency. Change-Id: I7f26156813139bbb7774e1eb342c91bc84fdad38
Diffstat (limited to 'include/osmocom')
-rw-r--r--include/osmocom/gsm/gsm0502.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/osmocom/gsm/gsm0502.h b/include/osmocom/gsm/gsm0502.h
index 1be2cc39..b6a18077 100644
--- a/include/osmocom/gsm/gsm0502.h
+++ b/include/osmocom/gsm/gsm0502.h
@@ -16,10 +16,10 @@
/*! Return the sum of two specified TDMA frame numbers (summation) */
#define GSM_TDMA_FN_SUM(a, b) \
- ((a + b) % GSM_TDMA_HYPERFRAME)
+ (((a) + (b)) % GSM_TDMA_HYPERFRAME)
/*! Return the difference of two specified TDMA frame numbers (subtraction) */
#define GSM_TDMA_FN_SUB(a, b) \
- ((a + GSM_TDMA_HYPERFRAME - b) % GSM_TDMA_HYPERFRAME)
+ (((a) + GSM_TDMA_HYPERFRAME - (b)) % GSM_TDMA_HYPERFRAME)
/*! Return the *minimum* difference of two specified TDMA frame numbers (distance) */
#define GSM_TDMA_FN_DIFF(a, b) \
OSMO_MIN(GSM_TDMA_FN_SUB(a, b), GSM_TDMA_FN_SUB(b, a))