83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_open.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: asargsya <asargsya@student.42yerevan.am> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/12/03 19:08:11 by asargsya #+# #+# */
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/* Updated: 2023/12/03 23:36:29 by achubuko ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "ft_open.h"
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t_file *ft_open(char *path)
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{
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t_file *file;
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file = malloc(sizeof(t_file));
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file->descriptor = open(path, O_RDONLY);
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file->read_window_size = 4096;
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file->read_window = malloc(sizeof(char) * file->read_window_size);
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file->read_size = 0;
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file->read_window_cursor = 0;
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file->buffer = 0;
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file->buffer_size = 0;
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return (file);
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}
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void ft_growbuffer(t_file *f, ssize_t grow)
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{
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char *prev;
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char *cur;
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ssize_t pos;
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prev = f->buffer;
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cur = malloc(sizeof(char) * (f->buffer_size + grow));
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pos = 0;
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while (prev && cur && pos < f->buffer_size)
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{
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cur[pos] = prev[pos];
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pos++;
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}
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while (cur && pos < f->buffer_size + grow)
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{
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cur[pos] = 0;
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pos++;
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}
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free(prev);
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f->buffer = cur;
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}
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ssize_t ft_churn(t_file *f)
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{
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f->read_size = read(f->descriptor, f->read_window, f->read_window_size);
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f->read_window_cursor = 0;
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return (f->read_size);
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}
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ssize_t ft_buffer_line(t_file *f)
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{
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char *c;
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ssize_t len;
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ft_growbuffer(f, 100);
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len = 0;
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c = 0;
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while (1)
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{
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if (f->read_window_cursor >= f->read_size)
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{
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ft_churn(f);
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}
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f->buffer[len] = f->read_window[f->read_window_cursor];
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if (len + 1 >= f->buffer_size)
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ft_growbuffer(f, 100);
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if (f->read_window[f->read_window_cursor] == '\n')
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return (len);
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len++;
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f->read_window_cursor++;
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}
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return (0);
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}
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