Kinou/get_next_line
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This commit is contained in:
kinou-p 2020-12-15 11:55:23 +01:00
parent 16c6103725
commit f82fc2e13e
1 changed files with 102 additions and 55 deletions
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155
get_next_line.c
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@ -6,12 +6,16 @@
/* By: apommier <alexpomms@student.42.fr> +#+ +:+ +#+ */ /* By: apommier <alexpomms@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2020/12/14 02:40:53 by apommier #+# #+# */ /* Created: 2020/12/14 02:40:53 by apommier #+# #+# */
/* Updated: 2020/12/14 21:31:17 by apommier ### ########.fr */ /* Updated: 2020/12/15 08:40:46 by apommier ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int ft_strlen(char *s1) int ft_strlen(char *s1)
{ {
@ -32,17 +36,19 @@ char *ft_strjoin(char *s1, char *s2)
i = 0; i = 0;
j = 0; j = 0;
if (!s1 && !s2)
return(0);
dest = (char*)malloc(sizeof(char) * (ft_strlen(s1) + ft_strlen(s2) + 1)); dest = (char*)malloc(sizeof(char) * (ft_strlen(s1) + ft_strlen(s2) + 1));
if (dest == 0) if (!dest)
return (0); return (0);
while (s1[i] && s1) while (s1 && s1[i])
{ {
dest[j] = s1[i]; dest[j] = s1[i];
j++; j++;
i++; i++;
} }
i = 0; i = 0;
while (s2[i]) while (s2 && s2[i])
{ {
dest[j] = s2[i]; dest[j] = s2[i];
j++; j++;
@ -52,54 +58,44 @@ char *ft_strjoin(char *s1, char *s2)
return (dest); return (dest);
} }
int ft_free(char *s1, char *s2, char *s3) static char *up_save(char *save, int fd, int *end)
{
if (s1)
free(s1);
if (s2)
free(s2);
if (s3)
free(s3);
return (0);
}
static char *up_save(char *save, int index, int fd)
{ {
char *dest; char *dest;
char *delete; char *delete;
int i; int i;
delete = save; delete = save;
if (index) if (!(dest = (char*)malloc(1 * (1 + BUFFER_SIZE))))
save += index;
if (!(dest = (char*)malloc(BUFFER_SIZE)))
{ {
ft_free(dest, delete, save); if (save)
free(save);
return (0); return (0);
} }
i = read(fd, dest, BUFFER_SIZE); i = read(fd, dest, BUFFER_SIZE);
if (!i) *end = i;
dest[i] = 0;
if (i < BUFFER_SIZE && dest[i - 1] != '\n')
{ {
ft_free(dest, delete, save); dest[i + 1] = 0;
return (0); dest[i] = '\n';
} }
if (!(save = ft_strjoin(save, dest))) if (!(save = ft_strjoin(save, dest)))
{ {
ft_free(dest, delete, save); free(dest);
free(delete);
return (0); return (0);
} }
free(delete);
return (save); return (save);
} }
int is_line(char *save, char **line) int is_line(char *save, int *end)
{ {
int i; int i;
i = 0; i = 0;
if (save == 0) if (save == 0)
return (0); return (0);
while (save[i] && i < BUFFER_SIZE) while (save[i])
{ {
if (save[i] == '\n') if (save[i] == '\n')
{ {
@ -108,41 +104,92 @@ int is_line(char *save, char **line)
} }
i++; i++;
} }
if (save[i] == 0) if (*end < BUFFER_SIZE)
{ return (1);
return (2);
*line = save;
}
return (0); return (0);
} }
char *is_next_line(char *save, int *end, int fd)
{
char *delete;
int i;
i = 0;
delete = save;
if (save)
{
while (save[i])
i++;
i++;
if (save[i])
if (!(save = ft_strjoin(save + i, 0)))
{
free(delete);
return (0);
}
}
i = 0;
while (!(is_line(save, end)))
{
save = up_save(save, fd, end);
if (!save)
{
free(delete);
return (0);
}
}
free(delete);
return (save);
}
int get_next_line(int fd, char **line) int get_next_line(int fd, char **line)
{ {
static char *save; static char *save;
int i; int j;
int *end;
i = 0; end = &j;
if (fd < 0 || !line || !BUFFER_SIZE) j = 0;
if (fd < 0 || !line || BUFFER_SIZE < 1)
return (-1);
save = is_next_line(save, end, fd);
if (!save)
return (-1); return (-1);
if (is_line(save, line))
{
while (save[i] != 0)
i++;
if (!(save = up_save(save, i, fd)))
return (-1);
}
else
{
if (!(save = up_save(save, 0, fd)))
return (-1);
}
while (!is_line(save, line))
{
if (is_line(save, line) == 2)
return (0);
if (!(save = up_save(save, 0, fd)))
return (-1);
}
*line = save; *line = save;
if (*end < BUFFER_SIZE)
return (0);
return (1); return (1);
} }
int main(int argc, char **argv)
{
int fd;
int ret;
char *buff;
int line;
printf("DEFINE BUFFER_SIZE=%d\n", BUFFER_SIZE);
line = 0;
if (argc == 2)
{
fd = open(argv[1], O_RDONLY);
while ((ret = get_next_line(fd, &buff)) > 0)
{
printf("\033[38;5;2m" "[Return: %d] Line ->%d : '%s'\n", ret, ++line, buff);
free(buff);
}
printf("\033[38;5;2m" "[Return: %d] Line ->%d : %s\n", ret, ++line, buff);
close(fd);
}
if (argc == 1)
{
printf("No input file, read here\n");
while ((ret = get_next_line(0, &buff)) > 0)
{
printf("\033[38;5;2m" "[Return: %d] Line ->%d: %s\n", ret, ++line, buff);
free(buff);
}
close(fd);
return (0);
}
}