42_get_next_line/get_next_line.c

91 lines
1.5 KiB
C
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2022-10-25 18:44:33 -04:00
#include "get_next_line.h"
char *ft_getstash(int fd)
{
char *str;
int readed;
str = ft_calloc(BUFFER_SIZE, sizeof(char));
if (str == NULL)
return (NULL);
readed = read(fd, str, BUFFER_SIZE);
if (readed < 0)
{
free(str);
return (NULL);
}
return (str);
}
ssize_t ft_strchr(char *str, char c)
{
size_t i;
if (str == NULL)
return (-1);
i = 0;
while (str[i] != c && str[i] != '\0')
i++;
if (str[i] == '\0' && c != '\0')
return (-1);
return (i);
}
char *ft_getline(int fd)
{
char *stash;
char *buf;
size_t i;
stash = NULL;
i = 0;
while (ft_strchr(stash + i * BUFFER_SIZE, '\n'))
{
stash = ft_realloc(stash, (i + 1) * BUFFER_SIZE);
if (stash == NULL)
return (NULL);
buf = ft_getstash(fd);
if (buf == NULL)
{
free(stash);
return (NULL);
}
ft_strcat(stash, buf);
free(buf);
if (stash[(i + 1) * BUFFER_SIZE -1] == '\0')
break ;
}
return (stash);
}
char *get_next_line(int fd)
{
static char *stash = NULL;
char *buf1;
char *buf2;
buf1 = NULL;
if (ft_strchr(stash, '\n') == -1)
{
buf1 = ft_getline(fd);
if (buf1 == NULL)
return (NULL);
stash = ft_realloc(stash, ft_strchr(buf1, '\0') + ft_strchr(stash, '\0') + 1);
if (stash == NULL)
return (NULL);
ft_strcat(stash, buf1);
free(buf1);
}
buf1 = ft_strndup(stash, ft_strchr(stash, '\n'));
buf2 = ft_strndup(stash + ft_strchr(stash, '\n') + 1, ft_strchr(stash, '\0'));
free(stash);
stash = buf2;
if (stash == NULL || buf1 == NULL)
{
free(stash);
free(buf1);
return (NULL);
}
return (buf1);
}