47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_strnstr.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: mcolonna <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/10/03 10:50:23 by mcolonna #+# #+# */
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/* Updated: 2023/10/09 16:09:21 by mcolonna ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include <stdlib.h>
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// Return 1 if there is 'little' at the pos 'i' of 'big', or else 0.
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static int match(const char *big, const char *little, size_t len, size_t i)
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{
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int j;
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j = 0;
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while (little[j])
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{
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if (len <= i || big[i] != little[j])
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return (0);
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i++;
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j++;
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}
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return (1);
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}
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char *ft_strnstr(const char *big, const char *little, size_t len)
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{
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size_t i;
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i = 0;
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if (!little[0])
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return ((char *)big);
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if (!big[i] || i >= len)
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return (NULL);
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while (!match(big, little, len, i))
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{
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i++;
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if (!big[i] || i >= len)
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return (NULL);
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}
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return ((char *)big + i);
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}
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