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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* readall.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: kdx <kdx @student.42angouleme.fr +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/10/10 07:51:08 by kdx #+# #+# */
/* Updated: 2022/10/10 08:07:42 by kdx ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft/libft.h"
#include "readall.h"
#include <unistd.h>
/* always free src */
static char *realloc_buf(char *src, size_t size)
{
char *cpy;
size_t i;
cpy = ft_calloc((size + 1) * READALL_BSIZE, sizeof(char));
if (cpy == NULL)
return (ft_free(src));
i = -1;
while (++i < size * READALL_BSIZE)
cpy[i] = src[i];
ft_free(src);
return (cpy);
}
char *readall(int fd)
{
char *buf;
int read_rv;
size_t read_cnt;
buf = realloc_buf(NULL, 0);
if (buf == NULL)
return (NULL);
read_cnt = 0;
read_rv = 1;
while (read_rv && buf != NULL)
{
read_rv = read(fd, buf + read_cnt * READALL_BSIZE, READALL_BSIZE);
read_cnt++;
if (read_rv < 0)
return (ft_free(buf));
else
buf = realloc_buf(buf, read_cnt);
if (read_rv != READALL_BSIZE)
return (buf);
}
return (buf);
}
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