bitvec: Introduce bitvec_get_nth_set_bit() function
This is particularly important for determining the ARFCN for cells
reported in 04.08 MEAS REP.
diff --git a/openbsc/src/bitvec.c b/openbsc/src/bitvec.c
index 8c82b87..ad03958 100644
--- a/openbsc/src/bitvec.c
+++ b/openbsc/src/bitvec.c
@@ -77,6 +77,22 @@
return ZERO;
}
+/* get the Nth set bit inside the bit vector */
+unsigned int bitvec_get_nth_set_bit(struct bitvec *bv, unsigned int n)
+{
+ unsigned int i, k = 0;
+
+ for (i = 0; i < bv->data_len*8; i++) {
+ if (bitvec_get_bit_pos(bv, i) == ONE) {
+ k++;
+ if (k == n)
+ return i;
+ }
+ }
+
+ return 0;
+}
+
/* set the bit at a given position inside a bitvec */
int bitvec_set_bit_pos(struct bitvec *bv, unsigned int bitnr,
enum bit_value bit)