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merge

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tulin@dl145b.mysql.com
2005-07-19 21:56:10 +02:00
parent 519c5564b1 e3af1b6ec6
commit a6c21a0791
195 changed files with 6600 additions and 2377 deletions
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33
mysys/my_bitmap.c
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@ -202,6 +202,7 @@ my_bool bitmap_test_and_set(MY_BITMAP *map, uint bitmap_bit)
bitmap_lock(map);
res= bitmap_fast_test_and_set(map, bitmap_bit);
bitmap_unlock(map);
return res;
}
uint bitmap_set_next(MY_BITMAP *map)
@ -327,10 +328,40 @@ void bitmap_intersect(MY_BITMAP *map, const MY_BITMAP *map2)
}
/*
Set/clear all bits above a bit.
SYNOPSIS
bitmap_set_above()
map RETURN The bitmap to change.
from_byte The bitmap buffer byte offset to start with.
use_bit The bit value (1/0) to use for all upper bits.
NOTE
You can only set/clear full bytes.
The function is meant for the situation that you copy a smaller bitmap
to a bigger bitmap. Bitmap lengths are always multiple of eigth (the
size of a byte). Using 'from_byte' saves multiplication and division
by eight during parameter passing.
RETURN
void
*/
void bitmap_set_above(MY_BITMAP *map, uint from_byte, uint use_bit)
{
uchar use_byte= use_bit ? 0xff : 0;
uchar *to= map->bitmap + from_byte;
uchar *end= map->bitmap + map->bitmap_size;
while (to < end)
*to++= use_byte;
}
void bitmap_subtract(MY_BITMAP *map, const MY_BITMAP *map2)
{
uint32 *to= map->bitmap, *from= map2->bitmap, *end;
DBUG_ASSERT(map->bitmap && map2->bitmap &&
map->n_bits==map2->n_bits);