NAME¶
ba_and_ba, ba_clear, ba_clear_all, ba_copy, ba_create, ba_destroy, ba_not,
ba_or_ba, ba_or_not_ba, ba_query, ba_resize, ba_set, ba_xor_ba - bit array
manipulation
SYNOPSIS¶
#include <bitarr.h>
Bitarr * ba_create(void);
void ba_destroy(Bitarr *ba);
Bitarr * ba_copy(const Bitarr *ba);
int ba_resize(Bitarr *ba, size_t max_number);
int ba_set(Bitarr *ba, unsigned number);
int ba_clear(Bitarr *ba, unsigned number);
void ba_clear_all(Bitarr *ba);
int ba_query(Bitarr *ba, unsigned number);
void ba_and_ba(Bitarr *ba1, const Bitarr *ba2);
int ba_or_ba(Bitarr *ba1, const Bitarr *ba2);
void ba_xor_ba(Bitarr *ba1, const Bitarr *ba2);
void ba_or_not_ba(Bitarr *ba1, const Bitarr *ba2);
void ba_not(Bitarr *ba);
DESCRIPTION¶
These functions operate on bit arrays.
ba_create creates one and
ba_destroy it.
ba_copy makes a copy of one, and
ba_resize
changes its size. The bit arrays resize themselves automatically, but
ba_resize can be used to get rid of extra memory allocated for the
array, or to make sure there is enough memory allocated for the array (so that
further operations are guaranteed to work).
ba_set sets one element (bit) in the array to 1.
ba_clear clears
one element (sets it to 0),
ba_clear_all clears all elements.
ba_query returns the current value of an element.
ba_and_ba,
ba_or_ba,
ba_xor_ba, and
ba_or_ba do
logical operations on two arrays. The result will be stored in the first one.
ba_not will invert all elements in the array.
RETURNS¶
ba_create and
ba_copy return a pointer to the new array, or NULL
if they fail. Those that return an integer, return -1 for error, non-negative
for success.
SEE ALSO¶
publib(3),
iset(3)
AUTHOR¶
Lars Wirzenius (lars.wirzenius@helsinki.fi)