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git-compat-util: introduce MEMZERO_ARRAY() macro

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Introduce a new macro MEMZERO_ARRAY() that zeroes the memory allocated
by ALLOC_ARRAY() and friends. And add coccinelle rule to enforce the use
of this macro.

Signed-off-by: Toon Claes <toon@iotcl.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Toon Claes
2025-12-10 14:13:01 +01:00
committed by Junio C Hamano
parent af0ed97e10
commit a67b902c94
8 changed files with 29 additions and 9 deletions
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git-compat-util.h
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@@ -726,6 +726,7 @@ static inline uint64_t u64_add(uint64_t a, uint64_t b)
#define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc)))
#define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x)))
#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc)))
#define MEMZERO_ARRAY(x, alloc) memset((x), 0x0, st_mult(sizeof(*(x)), (alloc)))
#define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \
BARF_UNLESS_COPYABLE((dst), (src)))