133 lines
2.8 KiB
C
133 lines
2.8 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: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/11/21 17:20:41 by dgaillet #+# #+# */
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/* Updated: 2025/11/23 19:08:58 by dgaillet ### ########lyon.fr */
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/* */
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/* ************************************************************************** */
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#include "get_next_line.h"
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#include <unistd.h>
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static void ft_bzero(void *s, size_t n)
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{
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while (n > 0)
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{
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*((unsigned char *) s) = '\0';
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s++;
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n--;
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}
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}
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static char *get_on_line(int fd, char buf[BUFFER_SIZE], char *nl, int res)
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{
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char *temp;
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while (1)
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{
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if (res <= 0)
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break ;
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nl = ft_strjoin_new(nl, buf, res);
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if (!nl)
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return (NULL);
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if (index_of_nl(nl, ft_strlen(nl)) >= 0)
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{
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temp = ft_substr(nl, 0, index_of_nl(nl, ft_strlen(nl)) + 1);
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free(nl);
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if (!temp)
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return (NULL);
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return (temp);
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}
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ft_bzero(buf, BUFFER_SIZE);
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res = read(fd, buf, BUFFER_SIZE);
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if (res <= 0)
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break ;
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}
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return (nl);
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}
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static char *return_full_nl(int fd, char buf[BUFFER_SIZE], char *nl)
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{
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int res;
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ft_bzero(buf, BUFFER_SIZE);
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res = read(fd, buf, BUFFER_SIZE);
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if (res <= 0)
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{
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free(nl);
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return (NULL);
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}
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return (get_on_line(fd, buf, nl, res));
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}
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static char *ft_ptr_match(void *to_search, void *to_match, int limit)
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{
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int i;
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i = 0;
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while (i < limit)
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{
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if (to_search == to_match)
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return (to_search);
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i++;
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to_search++;
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}
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return (NULL);
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}
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char *get_next_line(int fd)
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{
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static char buf[BUFFER_SIZE];
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static char *last_nl;
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char *temp;
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int nl_i;
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nl_i = -1;
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if (last_nl)
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{
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temp = ft_ptr_match(buf, last_nl, BUFFER_SIZE);
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if (temp)
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nl_i = index_of_nl(temp + 1, &buf[BUFFER_SIZE] - temp);
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if (nl_i >= 0)
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{
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last_nl = &temp[nl_i + 1];
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temp = ft_substr(temp, 1, nl_i + 1);
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return (temp);
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}
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temp = ft_substr(temp, 1, &buf[BUFFER_SIZE] - temp);
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temp = return_full_nl(fd, buf, temp);
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}
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else
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temp = return_full_nl(fd, buf, ft_calloc(sizeof(char), 1));
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if (temp)
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last_nl = &buf[index_of_nl(buf, BUFFER_SIZE)];
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return (temp);
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}
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/*
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#include <stdio.h>
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#include <fcntl.h>
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int main(int argc, char **argv)
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{
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char *str;
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int fd;
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if (argc > 1)
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{
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fd = open(argv[1], O_RDONLY);
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str = get_next_line(fd);
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while (str)
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{
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printf("%s", str);
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free(str);
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str = get_next_line(fd);
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}
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close(fd);
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}
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}
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*/
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