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Miscellaneous bitmap refactoring.

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This commit is contained in:
Jason Evans 2016-02-26 13:59:41 -08:00
parent 4c4ee292e4
commit 01ecdf32d6
4 changed files with 38 additions and 39 deletions
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33
src/bitmap.c
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@ -32,22 +32,6 @@ bitmap_info_init(bitmap_info_t *binfo, size_t nbits)
binfo->nbits = nbits;
}
size_t
bitmap_info_ngroups(const bitmap_info_t *binfo)
{
return (binfo->levels[binfo->nlevels].group_offset << LG_SIZEOF_BITMAP);
}
size_t
bitmap_size(size_t nbits)
{
bitmap_info_t binfo;
bitmap_info_init(&binfo, nbits);
return (bitmap_info_ngroups(&binfo));
}
void
bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo)
{
@ -61,8 +45,7 @@ bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo)
* correspond to the first logical bit in the group, so extra bits
* are the most significant bits of the last group.
*/
memset(bitmap, 0xffU, binfo->levels[binfo->nlevels].group_offset <<
LG_SIZEOF_BITMAP);
memset(bitmap, 0xffU, bitmap_size(binfo));
extra = (BITMAP_GROUP_NBITS - (binfo->nbits & BITMAP_GROUP_NBITS_MASK))
& BITMAP_GROUP_NBITS_MASK;
if (extra != 0)
@ -76,3 +59,17 @@ bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo)
bitmap[binfo->levels[i+1].group_offset - 1] >>= extra;
}
}
static size_t
bitmap_info_ngroups(const bitmap_info_t *binfo)
{
return (binfo->levels[binfo->nlevels].group_offset);
}
size_t
bitmap_size(const bitmap_info_t *binfo)
{
return (bitmap_info_ngroups(binfo) << LG_SIZEOF_BITMAP);
}