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David Gailleton
2025-12-05 17:37:02 +01:00
commit 86c2e68987
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get_next_char/get_next_char.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_char.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/11/21 17:20:41 by dgaillet #+# #+# */
/* Updated: 2025/12/05 14:04:02 by dgaillet ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include "get_next_char.h"
#include <unistd.h>
static int del_before_char(char buf[BUFFER_SIZE], char c)
{
int nl_i;
int i;
char *temp;
nl_i = index_of_char(buf, BUFFER_SIZE, c);
if (nl_i >= 0)
{
temp = ft_substr(buf, nl_i + 1, BUFFER_SIZE - nl_i);
if (!temp)
return (-1);
ft_bzero(buf, BUFFER_SIZE);
i = 0;
while (temp[i])
{
buf[i] = temp[i];
i++;
}
free(temp);
}
return (1);
}
static char *ft_read_one(char buf[BUFFER_SIZE], int fd, char *str)
{
int temp;
str = ft_strjoin_new(str, buf, BUFFER_SIZE);
if (!str)
return (NULL);
ft_bzero(buf, BUFFER_SIZE);
temp = read(fd, buf, BUFFER_SIZE);
if (temp < 0)
{
free(str);
return (NULL);
}
if ((!str || ft_strlen(str) == 0) && temp == 0)
{
free(str);
return (NULL);
}
if (temp == 0)
return (str);
return (str);
}
static char *extract_all_char(char buf[BUFFER_SIZE], int fd, char *str, int nl_i, char c)
{
int temp;
if (!str)
return (NULL);
while (nl_i < 0)
{
str = ft_read_one(buf, fd, str);
if (!str)
return (NULL);
nl_i = index_of_char(buf, BUFFER_SIZE, c);
if (nl_i < 0 && !ft_strlen(buf))
return (str);
}
str = ft_strjoin_new(str, buf, nl_i);
if (!str)
return (NULL);
temp = del_before_char(buf, c);
if (temp < 0)
{
free(str);
return (NULL);
}
return (str);
}
char *get_next_char(int fd, char c)
{
static char buf[BUFFER_SIZE + 1];
int nl_i;
int temp;
char *str;
if (fd < 0 || BUFFER_SIZE <= 0)
return (NULL);
nl_i = index_of_char(buf, BUFFER_SIZE, c);
if (nl_i >= 0)
{
str = ft_substr(buf, 0, nl_i + 1);
temp = del_before_char(buf, c);
if (temp < 0)
return (free(str), NULL);
}
else
str = extract_all_char(buf, fd, ft_substr("", 0, 1), nl_i, c);
return (str);
}