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get_next_line_utils.c
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get_next_line_utils.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line_utils.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: asilva <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/03 14:34:31 by asilva #+# #+# */
/* Updated: 2021/11/11 13:30:47 by asilva ### ########.fr */
/* */
/* ************************************************************************** */
#include "get_next_line.h"
void *ft_memcpy(const void *dst, const void *src, size_t n)
{
char *dstptr;
char *srcptr;
dstptr = (char *)(dst);
srcptr = (char *)(src);
if (dstptr && srcptr)
{
while (n--)
*dstptr++ = *srcptr++;
}
return ((void *)dst);
}
// find first char on a string, and return right side of the string
char *ft_strchr(const char *str, int c)
{
unsigned int i;
i = 0;
if (!str)
return (NULL);
while (str[i])
{
if (str[i] == (char)c)
return ((char *)&str[i]);
i++;
}
if ((char)c == str[i])
return ((char *)&str[i]);
return (0);
}
// Take a string as input, allocate memory for a copy of it and copy
char *ft_strdup(const char *src)
{
char *str;
int len;
if (src)
{
len = ft_strlen(src);
if (!len)
return (NULL);
str = (char *)malloc(sizeof(char) * (len + 1));
if (!str)
return (NULL);
ft_memcpy(str, src, len);
*(str + len) = '\0';
return (str);
}
return (NULL);
}
// Return the string length
size_t ft_strlen(const char *s)
{
size_t i;
char *cp;
i = 0;
cp = (char *)(s);
while (cp && *cp)
{
cp++;
i++;
}
return (i);
}
// Take 2 strings as inputs and concatenate them in a new allocated string
char *ft_strjoin(char const *s1, char const *s2)
{
size_t i;
size_t s1len;
size_t s2len;
char *s;
i = 0;
if (!s1 && !s2)
return (NULL);
if (!s1)
return (ft_strdup(s2));
if (!s2)
return (ft_strdup(s1));
s1len = ft_strlen(s1);
s2len = ft_strlen(s2);
s = (char *)malloc(sizeof(char) * (s1len + s2len + 1));
if (!s)
return (NULL);
while (i < (s1len + s2len + 1))
s[i++] = 0;
ft_memcpy(s, s1, s1len);
ft_memcpy(s + s1len, s2, s2len);
s[s1len + s2len] = '\0';
return (s);
}