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578398071e
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>
60 lines
767 B
Plaintext
60 lines
767 B
Plaintext
@@
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type T;
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T *dst;
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T *src;
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expression n;
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@@
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- memcpy(dst, src, n * sizeof(*dst));
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+ COPY_ARRAY(dst, src, n);
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@@
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type T;
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T *dst;
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T *src;
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expression n;
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@@
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- memcpy(dst, src, n * sizeof(*src));
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+ COPY_ARRAY(dst, src, n);
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@@
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type T;
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T *dst;
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T *src;
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expression n;
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@@
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- memcpy(dst, src, n * sizeof(T));
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+ COPY_ARRAY(dst, src, n);
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@@
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type T;
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T *dst;
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T *src;
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expression n;
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@@
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(
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- memmove(dst, src, (n) * sizeof(*dst));
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+ MOVE_ARRAY(dst, src, n);
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- memmove(dst, src, (n) * sizeof(*src));
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+ MOVE_ARRAY(dst, src, n);
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- memmove(dst, src, (n) * sizeof(T));
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+ MOVE_ARRAY(dst, src, n);
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)
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@@
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type T;
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T *ptr;
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expression n;
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@@
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- ptr = xmalloc(n * sizeof(*ptr));
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+ ALLOC_ARRAY(ptr, n);
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@@
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type T;
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T *ptr;
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expression n;
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@@
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- ptr = xmalloc(n * sizeof(T));
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+ ALLOC_ARRAY(ptr, n);
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