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| author | René Scharfe <l.s.r@web.de> | 2017-07-15 19:36:20 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-07-17 21:54:53 (GMT) |
| commit | 578398071e45d296c3dc1de10acdbc15365e763f (patch) | |
| tree | d49c040e24d00c7d1c706e4146e4de2bdae1fa5f /contrib | |
| parent | f3da2b79be9565779e4f76dc5812c68e156afdf0 (diff) | |
| download | git-578398071e45d296c3dc1de10acdbc15365e763f.zip git-578398071e45d296c3dc1de10acdbc15365e763f.tar.gz git-578398071e45d296c3dc1de10acdbc15365e763f.tar.bz2 | |
add MOVE_ARRAY
Similar to COPY_ARRAY (introduced in 60566cbb58), add a safe and
convenient helper for moving potentially overlapping ranges of array
entries. It infers the element size, multiplies automatically and
safely to get the size in bytes, does a basic type safety check by
comparing element sizes and unlike memmove(3) it supports NULL
pointers iff 0 elements are to be moved.
Also add a semantic patch to demonstrate the helper's intended usage.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/coccinelle/array.cocci | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/contrib/coccinelle/array.cocci b/contrib/coccinelle/array.cocci index 4ba98b7..c61d1ca 100644 --- a/contrib/coccinelle/array.cocci +++ b/contrib/coccinelle/array.cocci @@ -27,6 +27,23 @@ expression n; @@ type T; +T *dst; +T *src; +expression n; +@@ +( +- memmove(dst, src, (n) * sizeof(*dst)); ++ MOVE_ARRAY(dst, src, n); +| +- memmove(dst, src, (n) * sizeof(*src)); ++ MOVE_ARRAY(dst, src, n); +| +- memmove(dst, src, (n) * sizeof(T)); ++ MOVE_ARRAY(dst, src, n); +) + +@@ +type T; T *ptr; expression n; @@ |