ref: 75d6267a5f788162d92e7a5ae126cd8b0770aa8a
dir: /sys/src/games/sudoku/levels.c/
#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; }