2 Commits

Author	SHA1	Message	Date
Bryn M. Reeves	7dff632c11	libdm: add min_num_bits to dm_bitset_parse_list() ... It's useful to be able to specify a minimum number of bits for a new bitmap parsed from a list, for e.g. to allow for expansing a group without needing to copy/reallocate the bitmap. Add a backwards compatible symbol for programs linked against old versions of the library.	2016-12-13 21:02:18 +00:00
Bryn M. Reeves	5d1d65e735	libdm: add dm_bit_get_last()/dm_bit_get_prev() ... It is sometimes convenient to iterate over the set bits in a dm bitset in reverse order (from the highest set bit toward zero), or to quickly find the last set bit. Add dm_bit_get_last() and dm_bit_get_prev(), mirroring the existing dm_bit_get_first() and dm_bit_get_next(). dm_bit_get_prev() uses __builtin_clz when available to efficiently test the bitset in reverse.	2016-12-13 21:01:58 +00:00