mirror of
https://github.com/Ladebeze66/libft.git
synced 2025-12-13 04:36:55 +01:00
33 lines
1.3 KiB
C
Executable File
33 lines
1.3 KiB
C
Executable File
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_reallocarray.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: fgras-ca <fgras-ca@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/11/15 15:52:29 by fgras-ca #+# #+# */
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/* Updated: 2023/12/07 11:46:15 by fgras-ca ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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static size_t get_mul_no_overflow(void)
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{
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return ((size_t)1 << (sizeof(size_t) * 4));
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}
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void *ft_reallocarray(void *optr, size_t nmemb, size_t size, size_t oldsize)
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{
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size_t mul_no_overflow;
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mul_no_overflow = get_mul_no_overflow();
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if ((nmemb >= mul_no_overflow || size >= mul_no_overflow)
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&& nmemb > 0 && SIZE_MAX / nmemb < size)
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{
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errno = ENOMEM;
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return (NULL);
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}
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return (ft_realloc(optr, nmemb * size, oldsize));
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}
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