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ft_readtet.c
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ft_readtet.c
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/* ************************************************************************** */
/* */
/* :::::::: */
/* ft_readtet.c :+: :+: */
/* +:+ */
/* By: ravan-de <marvin@codam.nl> +#+ */
/* +#+ */
/* Created: 2019/05/31 14:41:34 by ravan-de #+# #+# */
/* Updated: 2019/06/11 18:05:57 by ravan-de ######## odam.nl */
/* */
/* ************************************************************************** */
#include "libft.h"
#include "fillit.h"
#include <fcntl.h>
#include <unistd.h>
/*
read_tet checks for:
- between every tetrimino there is only one newline
- all characters in tet are . or #
- every line of a tet = 4 chars followed by newline
*/
//read_tetrimino implies that reading happens in the function, but it only checks, so i changed it to check_tet.
//changed j to tet_pos so its more obvious that its the position/index while we iterate the tetrimino bit by bit
//also changed *n to *tet so its more obvious that its the tetrimino (or the number that represents the tetrimino)
int check_tet(char *buf, uint64_t *tet, int bytes)
{
int tet_pos;
size_t htags;
tet_pos = 0;
htags = 0;
while (tet_pos < bytes)
{
//Check that between every tetrimino there is a newline
//and not other characters
if (tet_pos == 20 && buf[tet_pos] != '\n')
return (-1);
//Check that all characters inside tetrimino are either . or #
//and that between tetriminos there is not more than 1 newline
//If it is not endofline & we are not in the newline between the
//2 tetriminos (tet_pos != 20) & different than . or #
//then error
//I put tet_pos + 1 because of calculation in function isendofline
if ((endline(tet_pos + 1) != 1) && tet_pos != 20 && buf[tet_pos] != '.' && buf[tet_pos] != '#')
return (-1);
//If at the end of line there is another character than newline
if ((endline(tet_pos + 1) == 1) && buf[tet_pos] != '\n')
return (-1);
if (buf[tet_pos] == '#')
{
htags++;
//printf(" \n we are in pos = %d \n", tet_pos);
*tet = tetr_calc((uint64_t)tet_pos, *tet);
}
tet_pos++;
}
if (htags != 4)
return (-1);
//printf("\n j = %d , n = %llu , neighbours = %d \n", j, *n, check_neighbours(*n));
if (check_neighbours(*tet) < 6)
return (-1);
return (0);
}
int read_file(int fd, t_list **tetr_lst)
{
int bytes_read;
uint64_t tet;
char buf[21];
int no_of_tetr;
no_of_tetr = 0;
bytes_read = read(fd, buf, 21);
if (bytes_read == -1)
return (-1);
while (bytes_read == 21 && no_of_tetr < 26)
{
tet = 0;
printf(ANSI_COLOR_CYAN "\n========== TETRIMINO => %d ============= \n" ANSI_COLOR_RESET, no_of_tetr);
printf("buf = '\n%s'\nbytes_read = %d ,tet = %llu \n", buf, bytes_read, tet);
if (check_tet(buf, &tet, bytes_read) == -1)
return (-1);
printf(ANSI_COLOR_YELLOW "TETRIMINO in 64 bits \n" ANSI_COLOR_RESET);
printf("tet = %llu \n", tet);
print_binary(tet, 4);
tet = shift_to_topleft(tet);
printf(ANSI_COLOR_YELLOW "TETRIMINO in 64 bits SHIFTED TOPLEFT \n" ANSI_COLOR_RESET);
print_binary(tet, 4);
save_tolist(tetr_lst, tet);
bytes_read = read(fd, buf, 21);
if (bytes_read == -1)
return (-1);
no_of_tetr++;
}
tet = 0;
if (bytes_read == 20 && buf[19] == '\n' && no_of_tetr < 26)
{
printf(ANSI_COLOR_CYAN "\n========== TETRIMINO => %d ============= \n" ANSI_COLOR_RESET, no_of_tetr);
printf("buf = '\n%s'\nbytes_read = %d ,num = %llu \n", buf, bytes_read, tet);
if (check_tet(buf, &tet, bytes_read) == -1)
return (-1);
printf(ANSI_COLOR_YELLOW "TETRIMINO in 64 bits \n" ANSI_COLOR_RESET);
printf("tet = %llu \n", tet);
print_binary(tet, 4);
tet = shift_to_topleft(tet);
printf(ANSI_COLOR_YELLOW "TETRIMINO in 64 bits SHIFTED TOPLEFT \n" ANSI_COLOR_RESET);
print_binary(tet, 4);
save_tolist(tetr_lst, tet);
no_of_tetr++;
return (0);
}
//If bytes_read != 21 or bytes_read != 20 or no newline at the EOF
else
return (-1);
}