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| author | Peter Xu <peterx@redhat.com> | 2019-06-03 14:50:49 +0800 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2019-07-15 15:39:02 +0200 |
| commit | ad37f24d57a81020ceba4c966563b1ad7c7199e3 (patch) | |
| tree | cff449c3ba7c7d77788ba137f7be8a2264ef495d /include/qemu/bitmap.h | |
| parent | ae7a2bca8a51f4a61704dc87137bd22ea555cc66 (diff) | |
| download | qemu-ad37f24d57a81020ceba4c966563b1ad7c7199e3.zip qemu-ad37f24d57a81020ceba4c966563b1ad7c7199e3.tar.gz qemu-ad37f24d57a81020ceba4c966563b1ad7c7199e3.tar.bz2 | |
bitmap: Add bitmap_copy_with_{src|dst}_offset()
These helpers copy the source bitmap to destination bitmap with a
shift either on the src or dst bitmap.
Meanwhile, we never have bitmap tests but we should.
This patch also introduces the initial test cases for utils/bitmap.c
but it only tests the newly introduced functions.
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20190603065056.25211-5-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
Bitmap test used sizeof(unsigned long) instead of BITS_PER_LONG.
Diffstat (limited to 'include/qemu/bitmap.h')
| -rw-r--r-- | include/qemu/bitmap.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h index 5c31334..82a1d2f 100644 --- a/include/qemu/bitmap.h +++ b/include/qemu/bitmap.h @@ -41,6 +41,10 @@ * bitmap_find_next_zero_area(buf, len, pos, n, mask) Find bit free area * bitmap_to_le(dst, src, nbits) Convert bitmap to little endian * bitmap_from_le(dst, src, nbits) Convert bitmap from little endian + * bitmap_copy_with_src_offset(dst, src, offset, nbits) + * *dst = *src (with an offset into src) + * bitmap_copy_with_dst_offset(dst, src, offset, nbits) + * *dst = *src (with an offset into dst) */ /* @@ -271,4 +275,9 @@ void bitmap_to_le(unsigned long *dst, const unsigned long *src, void bitmap_from_le(unsigned long *dst, const unsigned long *src, long nbits); +void bitmap_copy_with_src_offset(unsigned long *dst, const unsigned long *src, + unsigned long offset, unsigned long nbits); +void bitmap_copy_with_dst_offset(unsigned long *dst, const unsigned long *src, + unsigned long shift, unsigned long nbits); + #endif /* BITMAP_H */ |