196 lines
3.6 KiB
C
196 lines
3.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* get_next_line.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: apommier <alexpomms@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2020/12/14 02:40:53 by apommier #+# #+# */
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/* Updated: 2020/12/15 08:40:46 by apommier ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int ft_strlen(char *s1)
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{
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int i;
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i = 0;
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if (!s1)
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return (0);
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while (s1[i])
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i++;
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return (i);
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}
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char *ft_strjoin(char *s1, char *s2)
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{
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char *dest;
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int i;
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int j;
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i = 0;
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j = 0;
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if (!s1 && !s2)
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return(0);
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dest = (char*)malloc(sizeof(char) * (ft_strlen(s1) + ft_strlen(s2) + 1));
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if (!dest)
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return (0);
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while (s1 && s1[i])
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{
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dest[j] = s1[i];
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j++;
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i++;
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}
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i = 0;
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while (s2 && s2[i])
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{
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dest[j] = s2[i];
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j++;
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i++;
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}
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dest[j] = 0;
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return (dest);
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}
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static char *up_save(char *save, int fd, int *end)
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{
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char *dest;
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char *delete;
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int i;
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delete = save;
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if (!(dest = (char*)malloc(1 * (1 + BUFFER_SIZE))))
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{
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if (save)
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free(save);
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return (0);
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}
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i = read(fd, dest, BUFFER_SIZE);
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*end = i;
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dest[i] = 0;
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if (i < BUFFER_SIZE && dest[i - 1] != '\n')
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{
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dest[i + 1] = 0;
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dest[i] = '\n';
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}
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if (!(save = ft_strjoin(save, dest)))
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{
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free(dest);
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free(delete);
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return (0);
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}
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return (save);
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}
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int is_line(char *save, int *end)
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{
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int i;
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i = 0;
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if (save == 0)
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return (0);
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while (save[i])
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{
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if (save[i] == '\n')
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{
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save[i] = 0;
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return (1);
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}
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i++;
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}
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if (*end < BUFFER_SIZE)
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return (1);
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return (0);
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}
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char *is_next_line(char *save, int *end, int fd)
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{
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char *delete;
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int i;
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i = 0;
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delete = save;
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if (save)
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{
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while (save[i])
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i++;
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i++;
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if (save[i])
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if (!(save = ft_strjoin(save + i, 0)))
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{
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free(delete);
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return (0);
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}
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}
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i = 0;
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while (!(is_line(save, end)))
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{
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save = up_save(save, fd, end);
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if (!save)
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{
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free(delete);
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return (0);
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}
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}
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free(delete);
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return (save);
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}
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int get_next_line(int fd, char **line)
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{
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static char *save;
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int j;
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int *end;
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end = &j;
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j = 0;
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if (fd < 0 || !line || BUFFER_SIZE < 1)
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return (-1);
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save = is_next_line(save, end, fd);
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if (!save)
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return (-1);
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*line = save;
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if (*end < BUFFER_SIZE)
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return (0);
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return (1);
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}
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int main(int argc, char **argv)
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{
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int fd;
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int ret;
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char *buff;
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int line;
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printf("DEFINE BUFFER_SIZE=%d\n", BUFFER_SIZE);
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line = 0;
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if (argc == 2)
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{
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fd = open(argv[1], O_RDONLY);
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while ((ret = get_next_line(fd, &buff)) > 0)
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{
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printf("\033[38;5;2m" "[Return: %d] Line ->%d : '%s'\n", ret, ++line, buff);
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free(buff);
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}
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printf("\033[38;5;2m" "[Return: %d] Line ->%d : %s\n", ret, ++line, buff);
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close(fd);
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}
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if (argc == 1)
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{
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printf("No input file, read here\n");
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while ((ret = get_next_line(0, &buff)) > 0)
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{
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printf("\033[38;5;2m" "[Return: %d] Line ->%d: %s\n", ret, ++line, buff);
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free(buff);
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}
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close(fd);
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return (0);
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}
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}
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