diff options
Diffstat (limited to 'util/bitmap.c')
-rw-r--r-- | util/bitmap.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/util/bitmap.c b/util/bitmap.c index efced9a7d8..cb618c65a5 100644 --- a/util/bitmap.c +++ b/util/bitmap.c @@ -355,3 +355,50 @@ int slow_bitmap_intersects(const unsigned long *bitmap1, } return 0; } + +long slow_bitmap_count_one(const unsigned long *bitmap, long nbits) +{ + long k, lim = nbits / BITS_PER_LONG, result = 0; + + for (k = 0; k < lim; k++) { + result += ctpopl(bitmap[k]); + } + + if (nbits % BITS_PER_LONG) { + result += ctpopl(bitmap[k] & BITMAP_LAST_WORD_MASK(nbits)); + } + + return result; +} + +static void bitmap_to_from_le(unsigned long *dst, + const unsigned long *src, long nbits) +{ + long len = BITS_TO_LONGS(nbits); + +#ifdef HOST_WORDS_BIGENDIAN + long index; + + for (index = 0; index < len; index++) { +# if HOST_LONG_BITS == 64 + dst[index] = bswap64(src[index]); +# else + dst[index] = bswap32(src[index]); +# endif + } +#else + memcpy(dst, src, len * sizeof(unsigned long)); +#endif +} + +void bitmap_from_le(unsigned long *dst, const unsigned long *src, + long nbits) +{ + bitmap_to_from_le(dst, src, nbits); +} + +void bitmap_to_le(unsigned long *dst, const unsigned long *src, + long nbits) +{ + bitmap_to_from_le(dst, src, nbits); +} |