42_minishell/utils/ft_strreplace.c

#include "utils.h"

char	*ft_strreplace(char *str, const char *fill, size_t start, size_t stop)
{
	char	*out;
	size_t	sum;

	out = malloc((ft_strlen(str) + ft_strlen(fill) - (stop - start) + 1
				* sizeof(char)));
	if (out == NULL)
		return (NULL);
	ft_strncpy(out, str, start);
	ft_strncpy(out + start, fill, ft_strlen(fill));
	sum = start + ft_strlen(fill);
	ft_strncpy(out + sum, str + stop, ft_strlen(str) - stop);
	out[sum + ft_strlen(str) - stop] = '\0';
	return (out);
}