c03 - KimTaebin-ai/study_posts GitHub Wiki

#include <unistd.h>

int	ft_strcmp(char *s1, char *s2)
{
	int	i;

	i = 0;
	while (s1[i] || s2[i])
	{
		if (s1[i] != s2[i])
		{
			return (s1[i] - s2[i]);
		}
		i++;
	}
	return (0);
}

#include <unistd.h>

int	ft_strncmp(char *s1, char *s2, unsigned int n)
{
	unsigned int	i;
	unsigned int	result;

	i = 0;
	result = 0;
	if (n == 0)
		return (0);
	while (i < n)
	{
		result = s1[i] - s2[i];
		if (result != 0)
			break ;
		if (s1[i] == '\0' || s2[i] == '\0')
			break ;
		i++;
	}
	return (result);
}

#include <unistd.h>

char	*ft_strcat(char *dest, char *src)
{
	int	i;
	int	j;

	i = 0;
	while (dest[i] != '\0')
	{
		i++;
	}
	j = 0;
	while (src[j] != '\0')
	{
		dest[i] = src[j];
		i++;
		j++;
	}
	dest[i] = '\0';
	return (dest);
}

char	*ft_strncat(char *dest, char *src, unsigned int nb)
{
	unsigned int	i;
	unsigned int	j;

	i = 0;
	while (dest[i] != '\0')
		i++;
	j = 0;
	while (j < nb && src[j] != '\0')
		dest[i++] = src[j++];
	dest[i] = '\0';
	return (dest);
}

char	*ft_strstr(char *str, char *to_find)
{
	int	i;
	int	j;

	if (*to_find == '\0')
	{
		return (str);
	}
	i = 0;
	while (str[i] != '\0')
	{
		j = 0;
		while (str[i + j] == to_find[j])
		{
			if (to_find[j + 1] == '\0')
			{
				return (&str[i]);
			}
			j++;
		}
		i++;
	}
	return (NULL);
}

include <unistd.h>

int	ft_strlen(char *str)
{
	int	i;

	i = 0;
	while (str[i] != '\0')
		i++;
	return (i);
}

unsigned int	ft_strlcat(char *dest, char *src, unsigned int size)
{
	unsigned int	i;
	unsigned int	j;
	unsigned int	k;

	j = ft_strlen(dest);
	k = ft_strlen(src);
	i = 0;
	while (src[i] != '\0' && j + i < size - 1)
	{
		dest[j + i] = src[i];
		i++;
	}
	dest[j + i] = '\0';
	if (j < size)
		return (k + j);
	else
		return (k + size);
}