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#include <u.h>
2 
#include <libc.h>
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#include <bio.h>
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#include <draw.h>
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#include "sudoku.h"
7 
 
8 
void
9 
consumeline(Biobuf *b)
10 
{
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	while(Bgetc(b) != '\n')
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		;
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}
14 
 
15 
void
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fprettyprintbrd(Cell *board)
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{
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	int x, y, fd;
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	fd = create("/tmp/sudoku-print", OWRITE|OTRUNC, 0600);
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	if(fd < 0) {
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		perror("can not open save file /tmp/sudoku-save");
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		return;
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	}
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	for(x = 0; x < Brdsize; x++) {
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		for(y = 0; y < Brdsize; y++) {
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			fprint(fd, " ");
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			if(board[y*Brdsize + x].digit == -1)
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				fprint(fd, ".");
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			else
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				fprint(fd, "%d", board[y*Brdsize + x].digit+1);
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			if(((x*Brdsize + y + 1) % Brdsize) == 0 || (x*Brdsize + y + 1) == Psize)
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				fprint(fd, "\n");
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			if(((x*Brdsize + y + 1) % 3) == 0 && ((x*Brdsize + y + 1) % Brdsize) != 0)
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				fprint(fd, "|");
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			if(((x*Brdsize + y + 1) % 27) == 0 && ((x*Brdsize + y + 1) % Psize) != 0)
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				fprint(fd, " -------------------\n");
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43 
		}
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	}
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	close(fd);
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}
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48 
void
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fprintbrd(int fd, Cell *board)
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{
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	int i;
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	for(i = 0; i < Psize; i++) {
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		if(board[i].digit == -1)
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			fprint(fd, ".");
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		else
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			fprint(fd, "%d", board[i].digit+1);
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		if((i + 1) % Brdsize == 0)
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			fprint(fd, "\n");
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	}
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	for(i = 0; i < Psize; i++) {
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		fprint(fd, "%d", board[i].solve+1);
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		if((i + 1) % Brdsize == 0)
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			fprint(fd, "\n");
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	}
67 
 
68 
	close(fd);
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}
70 
 
71 
int
72 
loadlevel(char *name, Cell *board)
73 
{
74 
	Biobuf *b;
75 
	char c;
76 
	int i;
77 
 
78 
	b = Bopen(name, OREAD);
79 
	if(b == nil) {
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		fprint(2, "could not open file %s: %r\n", name);
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		return -1;
82 
	}
83 
 
84 
	i = 0;
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	while((c = Bgetc(b)) > 0) {
86 
		switch(c) {
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		case '.':
88 
			board[i].digit = -1;
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			board[i].locked = 0;
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			if(++i == 81)
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				goto next;
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			break;
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		case 0x31:
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		case 0x32:
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		case 0x33:
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		case 0x34:
97 
		case 0x35:
98 
		case 0x36:
99 
		case 0x37:
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		case 0x38:
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		case 0x39:
102 
			board[i].digit = c - 0x31;
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			board[i].locked = 1;
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			if(++i == 81)
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				goto next;
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			break;
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		case '\n':
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			break;
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		default:
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			fprint(2, "unknown character in initial board: %c\n", c);
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			goto done;
112 
		}
113 
	}
114 
next:
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	i = 0;
116 
	while((c = Bgetc(b)) > 0) {
117 
		switch(c) {
118 
		case 0x31:
119 
		case 0x32:
120 
		case 0x33:
121 
		case 0x34:
122 
		case 0x35:
123 
		case 0x36:
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		case 0x37:
125 
		case 0x38:
126 
		case 0x39:
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			board[i].solve = c - 0x31;
128 
			if(++i == 81)
129 
				goto done;
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			break;
131 
		case '\n':
132 
			break;
133 
		default:
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			fprint(2, "unknown character in board solution: %c\n", c);
135 
			goto done;
136 
		}
137 
	}
138 
 
139 
done:
140 
	Bterm(b);
141 
 
142 
	return i < 81 ? 0 : 1;
143 
}
144 
 
145 
void
146 
printboard(Cell *board)
147 
{
148 
	int fd;
149 
 
150 
	fd = create("/tmp/sudoku-board", OWRITE|OTRUNC, 0600);
151 
	if(fd < 0) {
152 
		perror("can not open save file /tmp/sudoku-save");
153 
		return;
154 
	}
155 
 
156 
	fprintbrd(fd, board);
157 
 
158 
	close(fd);
159 
}
160 
 
161 
void
162 
savegame(Cell *board)
163 
{
164 
	int fd;
165 
 
166 
	fd = create("/tmp/sudoku-save", OWRITE|OTRUNC, 0600);
167 
	if(fd < 0) {
168 
		perror("can not open save file /tmp/sudoku-save");
169 
		return;
170 
	}
171 
 
172 
	if(write(fd, board, Psize * sizeof(Cell)) != Psize * sizeof(Cell)) {
173 
		perror("could not save to file");
174 
		close(fd);
175 
	}
176 
 
177 
	close(fd);
178 
}
179 
 
180 
int
181 
loadgame(Cell *board)
182 
{
183 
	int fd;
184 
 
185 
	fd = open("/tmp/sudoku-save", OREAD);
186 
	if(fd < 0) {
187 
		perror("can not open save file /tmp/sudoku-save");
188 
		return -1;
189 
	}
190 
 
191 
	if(read(fd, board, Psize * sizeof(Cell)) != Psize * sizeof(Cell)) {
192 
		perror("insufficient data in save file");
193 
		close(fd);
194 
		return -1;
195 
	}
196 
 
197 
	close(fd);
198 
 
199 
	return 1;
200 
}