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libft: merge patch from Liewe to make memset faster #4

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libft: merge patch from Liewe to make memset faster #4

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8457a55
made memset significantly faster for very long strings.
lgutter Mar 9, 2020
9bf57fe
libft: merge patch from Liewe to make memset faster
nloomans Mar 9, 2020
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18 changes: 17 additions & 1 deletion subprojects/libft/src/ft_memset.c
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Original file line number Diff line number Diff line change
Expand Up @@ -14,9 +14,25 @@

void *ft_memset(void *b, int c, size_t len)
{
size_t i;
size_t i;
size_t chunk_size;
unsigned long long chunk;

chunk = 0;
chunk_size = sizeof(unsigned long long);
i = chunk_size / sizeof(unsigned char);
while (i > 0)
{
chunk <<= 8;
chunk |= (unsigned long long)(unsigned char)c;
i--;
}
i = 0;
while (len >= chunk_size && i < (len - chunk_size))
{
*(unsigned long long *)&(((unsigned char *)b)[i]) = chunk;
i += chunk_size;
}
while (i < len)
{
((unsigned char *)b)[i] = (unsigned char)c;
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