38 lines
595 B
C
38 lines
595 B
C
#include <stddef.h>
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#include <stdint.h>
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void *ft_memset64(void *s, int c, size_t n)
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{
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unsigned char *ptr = (unsigned char *)s;
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uint64_t pattern;
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uint64_t *long_ptr;
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unsigned char byte = (unsigned char)c;
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while (n > 0 && ((uintptr_t)ptr % 8 != 0))
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{
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*ptr++ = byte;
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n--;
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}
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if (n >= 8)
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{
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pattern = byte;
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pattern |= pattern << 8;
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pattern |= pattern << 16;
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pattern |= pattern << 32;
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long_ptr = (uint64_t *)ptr;
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while (n >= 8)
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{
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*long_ptr++ = pattern;
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n -= 8;
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}
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ptr = (unsigned char *)long_ptr;
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}
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while (n--)
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*ptr++ = byte;
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return s;
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}
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