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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <draw.h>
#include "sudoku.h"
void
consumeline(Biobuf *b)
{
while(Bgetc(b) != '\n')
;
}
void
fprettyprintbrd(Cell *board)
{
int x, y, fd;
fd = create("/tmp/sudoku-print", OWRITE|OTRUNC, 0600);
if(fd < 0) {
perror("can not open save file /tmp/sudoku-save");
return;
}
for(x = 0; x < Brdsize; x++) {
for(y = 0; y < Brdsize; y++) {
fprint(fd, " ");
if(board[y*Brdsize + x].digit == -1)
fprint(fd, ".");
else
fprint(fd, "%d", board[y*Brdsize + x].digit+1);
if(((x*Brdsize + y + 1) % Brdsize) == 0 || (x*Brdsize + y + 1) == Psize)
fprint(fd, "\n");
if(((x*Brdsize + y + 1) % 3) == 0 && ((x*Brdsize + y + 1) % Brdsize) != 0)
fprint(fd, "|");
if(((x*Brdsize + y + 1) % 27) == 0 && ((x*Brdsize + y + 1) % Psize) != 0)
fprint(fd, " -------------------\n");
}
}
close(fd);
}
void
fprintbrd(int fd, Cell *board)
{
int i;
for(i = 0; i < Psize; i++) {
if(board[i].digit == -1)
fprint(fd, ".");
else
fprint(fd, "%d", board[i].digit+1);
if((i + 1) % Brdsize == 0)
fprint(fd, "\n");
}
for(i = 0; i < Psize; i++) {
fprint(fd, "%d", board[i].solve+1);
if((i + 1) % Brdsize == 0)
fprint(fd, "\n");
}
close(fd);
}
int
loadlevel(char *name, Cell *board)
{
Biobuf *b;
char c;
int i;
b = Bopen(name, OREAD);
if(b == nil) {
fprint(2, "could not open file %s: %r\n", name);
return -1;
}
i = 0;
while((c = Bgetc(b)) > 0) {
switch(c) {
case '.':
board[i].digit = -1;
board[i].locked = 0;
if(++i == 81)
goto next;
break;
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
board[i].digit = c - 0x31;
board[i].locked = 1;
if(++i == 81)
goto next;
break;
case '\n':
break;
default:
fprint(2, "unknown character in initial board: %c\n", c);
goto done;
}
}
next:
i = 0;
while((c = Bgetc(b)) > 0) {
switch(c) {
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
board[i].solve = c - 0x31;
if(++i == 81)
goto done;
break;
case '\n':
break;
default:
fprint(2, "unknown character in board solution: %c\n", c);
goto done;
}
}
done:
Bterm(b);
return i < 81 ? 0 : 1;
}
void
printboard(Cell *board)
{
int fd;
fd = create("/tmp/sudoku-board", OWRITE|OTRUNC, 0600);
if(fd < 0) {
perror("can not open save file /tmp/sudoku-save");
return;
}
fprintbrd(fd, board);
close(fd);
}
void
savegame(Cell *board)
{
int fd;
fd = create("/tmp/sudoku-save", OWRITE|OTRUNC, 0600);
if(fd < 0) {
perror("can not open save file /tmp/sudoku-save");
return;
}
if(write(fd, board, Psize * sizeof(Cell)) != Psize * sizeof(Cell)) {
perror("could not save to file");
close(fd);
}
close(fd);
}
int
loadgame(Cell *board)
{
int fd;
fd = open("/tmp/sudoku-save", OREAD);
if(fd < 0) {
perror("can not open save file /tmp/sudoku-save");
return -1;
}
if(read(fd, board, Psize * sizeof(Cell)) != Psize * sizeof(Cell)) {
perror("insufficient data in save file");
close(fd);
return -1;
}
close(fd);
return 1;
}
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