osmocom
/
libosmocore
mirror of https://gerrit.osmocom.org/libosmocore
11
0
Fork 0
Code Issues Releases Wiki Activity

bitvec: Add bitvec_tailroom_bits() function 

This is similar to msgb_tailroom(): It returns the amount of space
left at the end of the bit vector (compared to the current cursor).

The function returns the number of bits left in the bitvec.

Change-Id: I8980a6b6d1973b67a2d9ad411c878d956fb428d1
This commit is contained in:
Harald Welte 2019-02-04 12:09:05 +01:00
parent ae7966d145
commit b0708d3e76
2 changed files with 25 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/osmocom/core/bitvec.h
View File

@ -93,4 +93,10 @@ static inline unsigned int bitvec_used_bytes(const struct bitvec *bv)
return bytes;
}
/*! Return the tailroom in number of unused bits remaining in the bit-vector */
static inline unsigned int bitvec_tailroom_bits(const struct bitvec *bv)
{
return bv->data_len*8 - bv->cur_bit;
}
/*! @} */

19
tests/bitvec/bitvec_test.c
View File

@ -204,6 +204,24 @@ static void test_used_bytes()
}
}
static void test_tailroom()
{
struct bitvec b;
uint8_t d[32];
unsigned int i;
b.data = d;
b.data_len = sizeof(d);
bitvec_zero(&b);
OSMO_ASSERT(bitvec_tailroom_bits(&b) == sizeof(d)*8);
for (i = 0; i < 8*sizeof(d); i++) {
bitvec_set_bit(&b, 1);
OSMO_ASSERT(bitvec_tailroom_bits(&b) == sizeof(d)*8-(i+1));
}
}
int main(int argc, char **argv)
{
struct bitvec bv;
@ -311,6 +329,7 @@ int main(int argc, char **argv)
printf("\nbitvec bytes used.\n");
test_used_bytes();
test_tailroom();
printf("\nbitvec ok.\n");
return 0;