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Diffstat (limited to 'ncurses-5.2/test/knight.c')
-rw-r--r-- | ncurses-5.2/test/knight.c | 591 |
1 files changed, 591 insertions, 0 deletions
diff --git a/ncurses-5.2/test/knight.c b/ncurses-5.2/test/knight.c new file mode 100644 index 0000000..d70c478 --- /dev/null +++ b/ncurses-5.2/test/knight.c @@ -0,0 +1,591 @@ +/* + * Knight's Tour - a brain game + * + * The original of this game was anonymous. It had an unbelievably bogus + * interface, you actually had to enter square coordinates! Redesign by + * Eric S. Raymond <esr@snark.thyrsus.com> July 22 1995. Mouse support + * added September 20th 1995. + * + * $Id$ + */ + +#include <test.priv.h> + +#include <ctype.h> +#include <signal.h> +#include <string.h> + +/* board size */ +#define BDEPTH 8 +#define BWIDTH 8 + +/* where to start the instructions */ +#define INSTRY 2 +#define INSTRX 35 + +/* corner of board */ +#define BOARDY 2 +#define BOARDX 0 + +/* notification line */ +#define NOTIFYY 21 + +/* virtual color values */ +#define TRAIL_COLOR 1 +#define PLUS_COLOR 2 +#define MINUS_COLOR 3 + +#define CX(x) (2 + 4 * (x)) +#define CY(y) (1 + 2 * (y)) +#define cellmove(y, x) wmove(boardwin, CY(y), CX(x)) +#define CXINV(x) (((x) - 1) / 4) +#define CYINV(y) (((y) - 2) / 2) + +typedef struct { + short x, y; +} cell; + +static short board[BDEPTH][BWIDTH]; /* the squares */ +static int rw, col; /* current row and column */ +static int lastrow, lastcol; /* last location visited */ +static cell history[BDEPTH * BWIDTH + 1]; /* choice history */ +static int movecount; /* count of moves so far */ +static WINDOW *boardwin; /* the board window */ +static WINDOW *helpwin; /* the help window */ +static WINDOW *msgwin; /* the message window */ +static chtype trail = '#'; /* trail character */ +static chtype plus = '+'; /* cursor hot-spot character */ +static chtype minus = '-'; /* possible-move character */ +static chtype oldch; + +static void init(void); +static void play(void); +static void dosquares(void); +static void drawmove(char, int, int, int, int); +static bool evalmove(int, int); +static bool chkmoves(void); +static bool chksqr(int, int); +static int iabs(int); + +int +main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED) +{ + init(); + + play(); + + endwin(); + return EXIT_SUCCESS; +} + +static void +init(void) +{ + srand((unsigned) getpid()); + initscr(); + cbreak(); /* immediate char return */ + noecho(); /* no immediate echo */ + boardwin = newwin(BDEPTH * 2 + 1, BWIDTH * 4 + 1, BOARDY, BOARDX); + helpwin = newwin(0, 0, INSTRY, INSTRX); + msgwin = newwin(1, INSTRX - 1, NOTIFYY, 0); + scrollok(msgwin, TRUE); + keypad(boardwin, TRUE); + + if (has_colors()) { + int bg = COLOR_BLACK; + + start_color(); +#if HAVE_USE_DEFAULT_COLORS + if (use_default_colors() == OK) + bg = -1; +#endif + + (void) init_pair(TRAIL_COLOR, COLOR_CYAN, bg); + (void) init_pair(PLUS_COLOR, COLOR_RED, bg); + (void) init_pair(MINUS_COLOR, COLOR_GREEN, bg); + + trail |= COLOR_PAIR(TRAIL_COLOR); + plus |= COLOR_PAIR(PLUS_COLOR); + minus |= COLOR_PAIR(MINUS_COLOR); + } +#ifdef NCURSES_MOUSE_VERSION + (void) mousemask(BUTTON1_CLICKED, (mmask_t *) NULL); +#endif /* NCURSES_MOUSE_VERSION */ + + oldch = minus; +} + +static void +help1(void) +/* game explanation -- initial help screen */ +{ + (void) waddstr(helpwin, "Knight's move is a solitaire puzzle. Your\n"); + (void) waddstr(helpwin, "objective is to visit each square of the \n"); + (void) waddstr(helpwin, "chessboard exactly once by making knight's\n"); + (void) waddstr(helpwin, "moves (one square right or left followed \n"); + (void) waddstr(helpwin, "by two squares up or down, or two squares \n"); + (void) waddstr(helpwin, "right or left followed by one square up or\n"); + (void) waddstr(helpwin, "down). You may start anywhere.\n\n"); + + (void) waddstr(helpwin, "Use arrow keys to move the cursor around.\n"); + (void) waddstr(helpwin, "When you want to move your knight to the \n"); + (void) waddstr(helpwin, "cursor location, press <space> or Enter.\n"); + (void) waddstr(helpwin, "Illegal moves will be rejected with an \n"); + (void) waddstr(helpwin, "audible beep.\n\n"); + (void) waddstr(helpwin, "The program will detect if you solve the\n"); + (void) waddstr(helpwin, "puzzle; also inform you when you run out\n"); + (void) waddstr(helpwin, "of legal moves.\n\n"); + + (void) mvwaddstr(helpwin, NOTIFYY - INSTRY, 0, + "Press `?' to go to keystroke help."); +} + +static void +help2(void) +/* keystroke help screen */ +{ + (void) waddstr(helpwin, "Possible moves are shown with `-'.\n\n"); + + (void) waddstr(helpwin, "You can move around with the arrow keys or\n"); + (void) waddstr(helpwin, "with the rogue/hack movement keys. Other\n"); + (void) waddstr(helpwin, "commands allow you to undo moves or redraw.\n"); + (void) waddstr(helpwin, "Your mouse may work; try left-button to\n"); + (void) waddstr(helpwin, "move to the square under the pointer.\n\n"); + + (void) waddstr(helpwin, "x,q -- exit y k u 7 8 9\n"); + (void) waddstr(helpwin, "r -- redraw screen \\|/ \\|/ \n"); + (void) waddstr(helpwin, "bksp -- undo move h-+-l 4-+-6\n"); + (void) waddstr(helpwin, " /|\\ /|\\ \n"); + (void) waddstr(helpwin, " b j n 1 2 3\n"); + + (void) waddstr(helpwin, "\nYou can place your knight on the selected\n"); + (void) waddstr(helpwin, "square with spacebar, Enter, or the keypad\n"); + (void) waddstr(helpwin, "center key. You can quit with `x' or `q'.\n"); + + (void) mvwaddstr(helpwin, NOTIFYY - INSTRY, 0, + "Press `?' to go to game explanation"); +} + +static void +play(void) +/* play the game */ +{ + bool keyhelp; /* TRUE if keystroke help is up */ + int c, ny = 0, nx = 0; + int i, j, count; + + do { + /* clear screen and draw board */ + werase(boardwin); + werase(helpwin); + werase(msgwin); + dosquares(); + help1(); + wnoutrefresh(stdscr); + wnoutrefresh(helpwin); + wnoutrefresh(msgwin); + wnoutrefresh(boardwin); + doupdate(); + + for (i = 0; i < BDEPTH; i++) + for (j = 0; j < BWIDTH; j++) { + board[i][j] = FALSE; + cellmove(i, j); + waddch(boardwin, minus); + } + memset(history, '\0', sizeof(history)); + history[0].y = history[0].x = -1; + lastrow = lastcol = -2; + movecount = 1; + keyhelp = FALSE; + + for (;;) { + if (rw != lastrow || col != lastcol) { + if (lastrow >= 0 && lastcol >= 0) { + cellmove(lastrow, lastcol); + if (board[lastrow][lastcol]) + waddch(boardwin, trail); + else + waddch(boardwin, oldch); + } + + cellmove(rw, col); + oldch = winch(boardwin); + + lastrow = rw; + lastcol = col; + } + cellmove(rw, col); + waddch(boardwin, plus); + cellmove(rw, col); + + wrefresh(msgwin); + + c = wgetch(boardwin); + + werase(msgwin); + + switch (c) { + case 'k': + case '8': + case KEY_UP: + ny = rw + BDEPTH - 1; + nx = col; + break; + case 'j': + case '2': + case KEY_DOWN: + ny = rw + 1; + nx = col; + break; + case 'h': + case '4': + case KEY_LEFT: + ny = rw; + nx = col + BWIDTH - 1; + break; + case 'l': + case '6': + case KEY_RIGHT: + ny = rw; + nx = col + 1; + break; + case 'y': + case '7': + case KEY_A1: + ny = rw + BDEPTH - 1; + nx = col + BWIDTH - 1; + break; + case 'b': + case '1': + case KEY_C1: + ny = rw + 1; + nx = col + BWIDTH - 1; + break; + case 'u': + case '9': + case KEY_A3: + ny = rw + BDEPTH - 1; + nx = col + 1; + break; + case 'n': + case '3': + case KEY_C3: + ny = rw + 1; + nx = col + 1; + break; + +#ifdef NCURSES_MOUSE_VERSION + case KEY_MOUSE: + { + MEVENT myevent; + + getmouse(&myevent); + if (myevent.y >= CY(0) && myevent.y <= CY(BDEPTH) + && myevent.x >= CX(0) && myevent.x <= CX(BWIDTH)) { + nx = CXINV(myevent.x); + ny = CYINV(myevent.y); + ungetch('\n'); + break; + } else { + beep(); + continue; + } + } +#endif /* NCURSES_MOUSE_VERSION */ + + case KEY_B2: + case '\n': + case ' ': + if (evalmove(rw, col)) { + drawmove(trail, + history[movecount - 1].y, + history[movecount - 1].x, + rw, col); + history[movecount].y = rw; + history[movecount].x = col; + movecount++; + + if (!chkmoves()) + goto dropout; + } else + beep(); + break; + + case KEY_REDO: + case '\f': + case 'r': + clearok(curscr, TRUE); + wnoutrefresh(stdscr); + wnoutrefresh(boardwin); + wnoutrefresh(msgwin); + wnoutrefresh(helpwin); + doupdate(); + break; + + case KEY_UNDO: + case KEY_BACKSPACE: + case '\b': + if (movecount == 1) { + ny = lastrow; + nx = lastcol; + waddstr(msgwin, "\nNo previous move."); + beep(); + } else { + int oldy = history[movecount - 1].y; + int oldx = history[movecount - 1].x; + + board[oldy][oldx] = FALSE; + --movecount; + ny = history[movecount - 1].y; + nx = history[movecount - 1].x; + drawmove(' ', oldy, oldx, ny, nx); + + /* avoid problems if we just changed the current cell */ + cellmove(lastrow, lastcol); + oldch = winch(boardwin); + } + break; + + case 'q': + case 'x': + goto dropout; + + case '?': + werase(helpwin); + if (keyhelp) { + help1(); + keyhelp = FALSE; + } else { + help2(); + keyhelp = TRUE; + } + wrefresh(helpwin); + break; + + default: + beep(); + break; + } + + col = nx % BWIDTH; + rw = ny % BDEPTH; + } + + dropout: + count = 0; + for (i = 0; i < BDEPTH; i++) + for (j = 0; j < BWIDTH; j++) + if (board[i][j] != 0) + count += 1; + if (count == (BWIDTH * BDEPTH)) + wprintw(msgwin, "\nYou won. Care to try again? "); + else + wprintw(msgwin, "\n%d squares filled. Try again? ", count); + } while + (tolower(wgetch(msgwin)) == 'y'); +} + +static void +dosquares(void) +{ + int i, j; + + mvaddstr(0, 20, "KNIGHT'S MOVE -- a logical solitaire"); + + move(BOARDY, BOARDX); + waddch(boardwin, ACS_ULCORNER); + for (j = 0; j < 7; j++) { + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_TTEE); + } + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_URCORNER); + + for (i = 1; i < BDEPTH; i++) { + move(BOARDY + i * 2 - 1, BOARDX); + waddch(boardwin, ACS_VLINE); + for (j = 0; j < BWIDTH; j++) { + waddch(boardwin, ' '); + waddch(boardwin, ' '); + waddch(boardwin, ' '); + waddch(boardwin, ACS_VLINE); + } + move(BOARDY + i * 2, BOARDX); + waddch(boardwin, ACS_LTEE); + for (j = 0; j < BWIDTH - 1; j++) { + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_PLUS); + } + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_RTEE); + } + + move(BOARDY + i * 2 - 1, BOARDX); + waddch(boardwin, ACS_VLINE); + for (j = 0; j < BWIDTH; j++) { + waddch(boardwin, ' '); + waddch(boardwin, ' '); + waddch(boardwin, ' '); + waddch(boardwin, ACS_VLINE); + } + + move(BOARDY + i * 2, BOARDX); + waddch(boardwin, ACS_LLCORNER); + for (j = 0; j < BWIDTH - 1; j++) { + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_BTEE); + } + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_HLINE); + waddch(boardwin, ACS_LRCORNER); +} + +static void +mark_possibles(int prow, int pcol, chtype mark) +{ + if (chksqr(prow + 2, pcol + 1)) { + cellmove(prow + 2, pcol + 1); + waddch(boardwin, mark); + }; + if (chksqr(prow + 2, pcol - 1)) { + cellmove(prow + 2, pcol - 1); + waddch(boardwin, mark); + }; + if (chksqr(prow - 2, pcol + 1)) { + cellmove(prow - 2, pcol + 1); + waddch(boardwin, mark); + }; + if (chksqr(prow - 2, pcol - 1)) { + cellmove(prow - 2, pcol - 1); + waddch(boardwin, mark); + }; + if (chksqr(prow + 1, pcol + 2)) { + cellmove(prow + 1, pcol + 2); + waddch(boardwin, mark); + }; + if (chksqr(prow + 1, pcol - 2)) { + cellmove(prow + 1, pcol - 2); + waddch(boardwin, mark); + }; + if (chksqr(prow - 1, pcol + 2)) { + cellmove(prow - 1, pcol + 2); + waddch(boardwin, mark); + }; + if (chksqr(prow - 1, pcol - 2)) { + cellmove(prow - 1, pcol - 2); + waddch(boardwin, mark); + }; +} + +static void +drawmove(char tchar, int oldy, int oldx, int row, int column) +/* place the stars, update board & currents */ +{ + if (movecount <= 1) { + int i, j; + + for (i = 0; i < BDEPTH; i++) + for (j = 0; j < BWIDTH; j++) { + cellmove(i, j); + if (winch(boardwin) == minus) + waddch(boardwin, movecount ? ' ' : minus); + } + } else { + cellmove(oldy, oldx); + waddch(boardwin, '\b'); + waddch(boardwin, tchar); + waddch(boardwin, tchar); + waddch(boardwin, tchar); + mark_possibles(oldy, oldx, ' '); + } + + if (row != -1 && column != -1) { + cellmove(row, column); + waddch(boardwin, '\b'); + waddch(boardwin, trail); + waddch(boardwin, trail); + waddch(boardwin, trail); + mark_possibles(row, column, minus); + board[row][column] = TRUE; + } + + wprintw(msgwin, "\nMove %d", movecount); +} + +static bool +evalmove(int row, int column) +/* evaluate move */ +{ + if (movecount == 1) + return (TRUE); + else if (board[row][column] == TRUE) { + waddstr(msgwin, "\nYou've already been there."); + return (FALSE); + } else { + int rdif = iabs(row - history[movecount - 1].y); + int cdif = iabs(column - history[movecount - 1].x); + + if (!((rdif == 1) && (cdif == 2)) && !((rdif == 2) && (cdif == 1))) { + waddstr(msgwin, "\nThat's not a legal knight's move."); + return (FALSE); + } + } + + return (TRUE); +} + +static bool +chkmoves(void) +/* check to see if valid moves are available */ +{ + if (chksqr(rw + 2, col + 1)) + return (TRUE); + if (chksqr(rw + 2, col - 1)) + return (TRUE); + if (chksqr(rw - 2, col + 1)) + return (TRUE); + if (chksqr(rw - 2, col - 1)) + return (TRUE); + if (chksqr(rw + 1, col + 2)) + return (TRUE); + if (chksqr(rw + 1, col - 2)) + return (TRUE); + if (chksqr(rw - 1, col + 2)) + return (TRUE); + if (chksqr(rw - 1, col - 2)) + return (TRUE); + return (FALSE); +} + +static int +iabs(int num) +{ + if (num < 0) + return (-num); + else + return (num); +} + +static bool +chksqr(int r1, int c1) +{ + if ((r1 < 0) || (r1 > BDEPTH - 1)) + return (FALSE); + if ((c1 < 0) || (c1 > BWIDTH - 1)) + return (FALSE); + return ((!board[r1][c1]) ? TRUE : FALSE); +} + +/* knight.c ends here */ |