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pipex_utils.c
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pipex_utils.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* pipex_utils.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mac <mac@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/01/07 19:33:55 by mac #+# #+# */
/* Updated: 2022/02/17 13:33:05 by mac ### ########.fr */
/* */
/* ************************************************************************** */
#include "pipex.h"
size_t ft_strlen(const char *s)
{
int i;
i = 0;
while (s[i])
i++;
return (i);
}
char *ft_strdup(const char *s1)
{
size_t s1len;
size_t i;
char *str;
i = 0;
s1len = ft_strlen(s1);
str = (char *) malloc(sizeof(char) * s1len + 1);
if (!str)
return (NULL);
while (s1[i] && i < s1len)
{
str[i] = s1[i];
i++;
}
str[i] = '\0';
return (str);
}
char *ft_strjoin(char const *s1, char const *s2)
{
size_t s1len;
size_t s2len;
size_t i;
char *joined;
if (!s1)
return (NULL);
s1len = ft_strlen(s1);
s2len = ft_strlen(s2);
joined = (char *) malloc(sizeof(char) * (s1len + s2len + 1));
if (!joined)
return (NULL);
i = 0;
while (i < s1len)
{
joined[i] = s1[i];
i++;
}
while (i < s1len + s2len)
{
joined[i] = s2[i - s1len];
i++;
}
joined[i] = '\0';
return (joined);
}
char *ft_substr(char const *s, unsigned int start, size_t len)
{
char *sub;
char *str;
size_t i;
size_t slen;
str = (char *) s;
if (!s)
return (NULL);
slen = ft_strlen(s);
if (start > slen)
return (ft_strdup(""));
if (len > slen)
len = slen;
sub = (char *) malloc(sizeof(char) * (len + 1));
if (!sub)
return (NULL);
i = 0;
while (str[start] && i < len)
{
sub[i++] = str[start++];
}
sub[i] = '\0';
return (sub);
}
int ft_strncmp(const char *s1, const char *s2, size_t n)
{
unsigned char *c1;
unsigned char *c2;
size_t i;
c1 = (unsigned char *) s1;
c2 = (unsigned char *) s2;
i = 0;
if (n != 0)
{
if (c1[0] == '\0' || c2[0] == '\0')
return (c1[0] - c2[0]);
while (i < n && (c1[i] || c2[i]))
{
if (c1[i] != c2[i])
return (c1[i] - c2[i]);
else
i++;
}
}
return (0);
}