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/*
 * Landmine, the game.
 * Written for mini-X by David I. Bell.
 */
 
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#if UNIX | DOS_DJGPP
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#endif
#define MWINCLUDECOLORS
#include "nano-X.h"
 
 
#define MINSIZE         3               /* minimum size of board */
#define MAXSIZE         30              /* maximum size of board */
#define SIZE            15              /* default size of playing board */
#define MINEPERCENT     15              /* default percentage of mines */
#define SAVEFILE        "landmine.save" /* default save file name */
#define MAGIC           649351261       /* magic number in save files */
#define MAXPARAMS       1000            /* maximum different game parameters */
 
#define FULLSIZE        (MAXSIZE + 2)   /* board size including borders */
 
#ifdef __ECOS
/* 240x320 screen values*/
#define BOARDGAP        2               /* millimeter gap around board */
#define RIGHTGAP        2               /* mm gap between board, right side */
#define BUTTONGAP       5               /* mm gap between buttons */
#define STATUSGAP       10              /* mm gap between buttons and status */
 
#define BUTTONWIDTH     80              /* width of buttons (pixels) */
#define BUTTONHEIGHT    25              /* height of buttons (pixels) */
#define RIGHTSIDE       90              /* pixels to guarantee for right side */
#define BOARDBORDER     2               /* border size around board */
#else
#define BOARDGAP        10              /* millimeter gap around board */
#define RIGHTGAP        15              /* mm gap between board, right side */
#define BUTTONGAP       20              /* mm gap between buttons */
#define STATUSGAP       35              /* mm gap between buttons and status */
 
#define BUTTONWIDTH     80              /* width of buttons (pixels) */
#define BUTTONHEIGHT    25              /* height of buttons (pixels) */
#define RIGHTSIDE       150             /* pixels to guarantee for right side */
#define BOARDBORDER     2               /* border size around board */
#endif
 
/*
 * Print the number of steps taken.
 * This is used twice, and is a macro to guarantee that
 * the two printouts match.
 */
#define PRINTSTEPS      printline(2, "Steps: %3d\n", steps)
 
 
/*
 * Typedefs local to this program.
 */
typedef unsigned short  CELL;   /* cell value */
typedef int             POS;    /* cell position */
 
 
/*
 * For defining bitmaps easily.
 */
#define X       ((unsigned) 1)
#define _       ((unsigned) 0)
 
#define BITS(a,b,c,d,e,f,g,h,i) \
        (((((((((a*2+b)*2+c)*2+d)*2+e)*2+f)*2+g)*2+h)*2+i) << 7)
 
 
static  GR_BITMAP       twolegs_fg[] = {        /* two legs foreground */
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,_,X,_,_,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,X,_,X,_,X,_,X,_),
        BITS(_,X,_,X,X,X,_,X,_),
        BITS(_,_,_,X,_,X,_,_,_),
        BITS(_,_,_,X,_,X,_,_,_),
        BITS(_,_,X,X,_,X,X,_,_),
        BITS(_,_,_,_,_,_,_,_,_)
};
 
static  GR_BITMAP       twolegs_bg[] = {        /* two legs background */
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,X,X,X,X,X,X,X,_),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(X,X,X,X,_,X,X,X,X),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(_,X,X,X,X,X,X,X,_),
        BITS(_,X,X,X,X,X,X,X,_),
        BITS(_,X,X,X,X,X,X,X,_)
};
 
 
static  GR_BITMAP       oneleg_fg[] = {         /* one leg foreground */
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,_,X,_,_,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,X,_,X,_,X,_,X,_),
        BITS(_,_,_,X,X,X,_,X,_),
        BITS(_,_,_,_,_,X,_,_,_),
        BITS(_,_,_,_,_,X,_,_,_),
        BITS(_,_,_,_,_,X,X,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
};
 
 
static  GR_BITMAP       oneleg_bg[] = {         /* one leg background */
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,X,X,X,X,X,X,X,_),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(X,X,X,X,_,X,X,X,X),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(_,_,X,X,X,X,X,X,X),
        BITS(_,_,_,_,X,X,X,X,_),
        BITS(_,_,_,_,X,X,X,X,_),
        BITS(_,_,_,_,X,X,X,X,_)
};
 
 
static  GR_BITMAP       noleg_fg[] = {          /* no legs foreground */
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,_,X,_,_,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,X,_,X,_,X,_,X,_),
        BITS(_,_,_,X,X,X,_,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
};
 
 
static  GR_BITMAP       noleg_bg[] = {          /* no legs background */
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,X,X,X,X,X,X,X,_),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(X,X,X,X,_,X,X,X,X),
        BITS(X,X,X,X,X,X,X,X,X),
        BITS(_,_,X,X,X,X,X,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,_,_,_,_,_,_),
        BITS(_,_,_,_,_,_,_,_,_)
};
 
 
/*
 * Components of a cell.
 */
#define F_EMPTY         ' '             /* default value for empty square */
#define F_REMEMBER      '*'             /* character to remember mine */
#define F_WRONG         'X'             /* character to remember wrong guess */
#define F_DISPLAY       0xff            /* character to be displayed here */
#define F_MINE          0x100           /* TRUE if a mine is here */
#define F_EDGE          0x200           /* TRUE if this is edge of the world */
#define F_OLD           0x400           /* TRUE if been at this square before */
#define F_REACH         0x800           /* TRUE if can reach this square */
#define F_FLAGS         0xff00          /* all flags */
 
 
/*
 * The status of the game.
 * This structure is read and written from the save file.
 */
static  struct status {                 /* status of games */
        long    s_magic;                /* magic number */
        short   s_playing;              /* TRUE if playing a game */
        short   s_size;                 /* current size of board */
        short   s_mines;                /* current number of mines on board */
        short   s_legs;                 /* number of legs left */
        short   s_steps;                /* number of steps taken this game */
        short   s_index;                /* current game parameter index */
        short   s_sizeparam[MAXPARAMS]; /* table of size parameters */
        short   s_mineparam[MAXPARAMS]; /* table of mine parameters */
        long    s_games0[MAXPARAMS];    /* games finished with no legs */
        long    s_games1[MAXPARAMS];    /* games finished with one leg */
        long    s_games2[MAXPARAMS];    /* games finished with two legs */
        long    s_steps0[MAXPARAMS];    /* steps taken in no leg games */
        long    s_steps1[MAXPARAMS];    /* steps taken in one leg games */
        long    s_steps2[MAXPARAMS];    /* steps taken in two leg games */
        CELL    s_board[FULLSIZE*FULLSIZE];     /* board layout */
} st;
 
 
/*
 * Definitions to make structure references easy.
 */
#define magic           st.s_magic
#define playing         st.s_playing
#define size            st.s_size
#define mines           st.s_mines
#define legs            st.s_legs
#define steps           st.s_steps
#define index           st.s_index
#define sizeparam       st.s_sizeparam
#define mineparam       st.s_mineparam
#define games0          st.s_games0
#define games1          st.s_games1
#define games2          st.s_games2
#define steps0          st.s_steps0
#define steps1          st.s_steps1
#define steps2          st.s_steps2
#define board           st.s_board
 
 
#define boardpos(row, col)      (((row) * FULLSIZE) + (col))
#define ismine(cell)            ((cell) & F_MINE)
#define isedge(cell)            ((cell) & F_EDGE)
#define isold(cell)             ((cell) & F_OLD)
#define isseen(cell)            (((cell) & F_DISPLAY) == F_REMEMBER)
#define isknown(cell)           (((cell) & F_DISPLAY) != F_EMPTY)
#define displaychar(cell)       ((cell) & F_DISPLAY)
#define badsquare(n)            (((n) <= 0) || ((n) > size))
 
 
/*
 * Offsets for accessing adjacent cells.
 */
static  POS     steptable[8] = {
        FULLSIZE, -FULLSIZE, 1, -1, FULLSIZE-1,
        FULLSIZE+1, -FULLSIZE-1, -FULLSIZE+1
};
 
 
static  GR_WINDOW_ID    mainwid;        /* main window id */
static  GR_WINDOW_ID    boardwid;       /* board window id */
static  GR_WINDOW_ID    statwid;        /* status display window id */
static  GR_WINDOW_ID    quitwid;        /* window id for quit button */
static  GR_WINDOW_ID    savewid;        /* window id for save button */
static  GR_WINDOW_ID    newgamewid;     /* window id for new game button */
 
static  GR_GC_ID        boardgc;        /* graphics context for board */
static  GR_GC_ID        cleargc;        /* GC for clearing cell of board */
static  GR_GC_ID        redgc;          /* GC for drawing red */
static  GR_GC_ID        greengc;        /* GC for drawing green */
static  GR_GC_ID        blackgc;        /* GC for drawing black */
static  GR_GC_ID        delaygc;        /* GC for delaying */
static  GR_GC_ID        statgc;         /* GC for status window */
static  GR_GC_ID        buttongc;       /* GC for drawing buttons */
static  GR_GC_ID        xorgc;          /* GC for inverting things */
 
static  GR_SIZE         xp;             /* pixels for x direction per square */
static  GR_SIZE         yp;             /* pixels for y direction per square */
static  GR_SIZE         statwidth;      /* width of window drawing text in */
static  GR_SIZE         statheight;     /* height of window drawing text in */
static  GR_SIZE         charheight;     /* height of characters */
static  GR_COORD        charxpos;       /* current X position for characters */
static  GR_COORD        charypos;       /* current Y position for characters */
 
static  GR_SCREEN_INFO  si;             /* window information */
static  GR_FONT_INFO    fi;             /* font information */
 
static  GR_SIZE         COLS, ROWS;
 
static  char    *savefile;              /* filename for saving game */
 
 
/*
 * Procedures.
 */
static  void    printline(GR_COORD, char *, ...);
static  void    newline();
static  void    delay();
static  void    dokey();
static  void    handleevent();
static  void    doexposure();
static  void    dobutton();
static  void    drawbomb();
static  void    drawstatus();
static  void    drawbutton();
static  void    drawboard();
static  void    drawcell();
static  void    cellcenter();
static  void    clearcell();
static  void    newgame();
static  void    movetopos();
static  void    setcursor();
static  void    togglecell();
static  void    gameover();
static  void    readgame();
static  void    findindex();
static  POS     findcell();
static  GR_BOOL checkpath();
static  GR_BOOL writegame();
 
int
main(argc,argv)
        int argc;
        char **argv;
{
        GR_COORD        x;
        GR_COORD        y;
        GR_SIZE         width;
        GR_SIZE         height;
        GR_COORD        rightx;         /* x coordinate for right half stuff */
        GR_BOOL         setsize;        /* TRUE if size of board is set */
        GR_BOOL         setmines;       /* TRUE if number of mines is set */
        GR_SIZE         newsize = 10;   /* desired size of board */
        GR_COUNT        newmines = 25;  /* desired number of mines */
        GR_WM_PROPERTIES props;
 
        setmines = GR_FALSE;
        setsize = GR_FALSE;
 
        argc--;
        argv++;
        while ((argc > 0) && (**argv == '-')) {
                switch (argv[0][1]) {
                        case 'm':
                                if (argc <= 0) {
                                        fprintf(stderr, "Missing mine count\n");
                                        exit(1);
                                }
                                argc--;
                                argv++;
                                newmines = atoi(*argv);
                                setmines = GR_TRUE;
                                break;
 
                        case 's':
                                if (argc <= 0) {
                                        fprintf(stderr, "Missing size\n");
                                        exit(1);
                                }
                                argc--;
                                argv++;
                                newsize = atoi(*argv);
                                setsize = GR_TRUE;
                                break;
 
                        default:
                                fprintf(stderr, "Unknown option \"-%c\"\n",
                                        argv[0][1]);
                                exit(1);
                }
                argc--;
                argv++;
        }
        if (argc > 0)
                savefile = *argv;
 
        srand(time(0));
 
        readgame(savefile);
 
        if (setsize) {
                if ((newsize < MINSIZE) || (newsize > MAXSIZE)) {
                        fprintf(stderr, "Illegal board size\n");
                        exit(1);
                }
                if (newsize != size) {
                        if (steps && playing) {
                                fprintf(stderr,
                                        "Cannot change size while game is in progress\n");
                                exit(1);
                        }
                        playing = GR_FALSE;
                        size = newsize;
                        if (!playing)
                                mines = (size * size * MINEPERCENT) / 100;
                }
        }
 
        if (setmines) {
                if ((newmines <= 0) || ((newmines > (size * size) / 2))) {
                        fprintf(stderr, "Illegal number of mines\n");
                        exit(1);
                }
                if (newmines != mines) {
                        if (steps && playing) {
                                fprintf(stderr,
                                        "Cannot change mines while game is in progress\n");
                                exit(1);
                        }
                        playing = GR_FALSE;
                        mines = newmines;
                }
        }
 
        findindex();
 
        /*
         * Parameters of the game have been verified.
         * Now open the graphics and play the game.
         */
 
        if (GrOpen() < 0) {
                fprintf(stderr, "Cannot open graphics\n");
                exit(1);
        }
 
        GrReqShmCmds(655360); /* Test by Morten Rolland for shm support */
 
        GrGetScreenInfo(&si);
        GrGetFontInfo(0, &fi);
        charheight = fi.height;
 
        /*
         * Create the main window which will contain all the others.
         */
#if 0
COLS = si.cols - 40;
#else
COLS = si.cols;
#endif
ROWS = si.rows - 80;
        mainwid = GrNewWindow(GR_ROOT_WINDOW_ID, 0, 0, COLS, ROWS,
                0, BLACK, WHITE);
 
        /* set title */
        props.flags = GR_WM_FLAGS_TITLE | GR_WM_FLAGS_PROPS;
        props.props = GR_WM_PROPS_APPFRAME | GR_WM_PROPS_CAPTION;
        props.title = "Land Mine";
        GrSetWMProperties(mainwid, &props);
 
        /*
         * Create the board window which lies at the left side.
         * Make the board square, and as large as possible while still
         * leaving room to the right side for statistics and buttons.
         */
        width = COLS - RIGHTSIDE - (si.xdpcm * RIGHTGAP / 10) - BOARDBORDER * 2;
        height = (((long) width) * si.ydpcm) / si.xdpcm;
        if (height > ROWS /* - y * 2*/) {
                height = ROWS - BOARDBORDER * 2;
                width = (((long) height) * si.xdpcm) / si.ydpcm;
        }
        xp = width / size;
        yp = height / size;
 
        width = xp * size - 1;
        height = yp * size - 1;
        x = BOARDBORDER;
        y = (ROWS - height) / 2;
 
        rightx = x + width + (si.xdpcm * RIGHTGAP / 10);
        boardwid = GrNewWindow(mainwid, x, y, width, height, BOARDBORDER,
                BLUE, WHITE);
        /*
         * Create the buttons.
         */
        x = rightx;
        y = (si.ydpcm * BOARDGAP / 10);
        quitwid = GrNewWindow(mainwid, x, y, BUTTONWIDTH, BUTTONHEIGHT,
                1, RED, WHITE);
 
        y += (si.ydpcm * BUTTONGAP / 10);
        savewid = GrNewWindow(mainwid, x, y, BUTTONWIDTH, BUTTONHEIGHT,
                1, GREEN, WHITE);
 
        y += (si.ydpcm * BUTTONGAP / 10);
        newgamewid = GrNewWindow(mainwid, x, y, BUTTONWIDTH, BUTTONHEIGHT,
                1, GREEN, WHITE);
 
        /*
         * Create the statistics window.
         */
        x = rightx;
        y += (si.ydpcm * STATUSGAP / 10);
        width = COLS - x;
        height = ROWS - y;
        statwid = GrNewWindow(mainwid, x, y, width, height, 0,
                0, 0);
        statwidth = width;
        statheight = height;
 
        /*
         * Create the GC for drawing the board.
         */
        boardgc = GrNewGC();
        cleargc = GrNewGC();
        delaygc = GrNewGC();
        redgc = GrNewGC();
        greengc = GrNewGC();
        statgc = GrNewGC();
        blackgc = GrNewGC();
        buttongc = GrNewGC();
        xorgc = GrNewGC();
        GrSetGCBackground(boardgc, BLUE);
        GrSetGCForeground(cleargc, BLUE);
        GrSetGCForeground(redgc, RED);
        GrSetGCForeground(greengc, GREEN);
        GrSetGCForeground(statgc, GRAY);
        GrSetGCForeground(delaygc, BLACK);
        GrSetGCForeground(blackgc, BLACK);
        GrSetGCMode(delaygc, GR_MODE_XOR);
        GrSetGCMode(xorgc, GR_MODE_XOR);
        GrSetGCUseBackground(boardgc, GR_FALSE);
        GrSetGCUseBackground(buttongc, GR_FALSE);
 
        GrSelectEvents(mainwid, GR_EVENT_MASK_CLOSE_REQ);
 
        GrSelectEvents(boardwid, GR_EVENT_MASK_EXPOSURE |
                GR_EVENT_MASK_BUTTON_DOWN | GR_EVENT_MASK_KEY_DOWN);
 
        GrSelectEvents(statwid, GR_EVENT_MASK_EXPOSURE);
 
        GrSelectEvents(quitwid, GR_EVENT_MASK_EXPOSURE |
                GR_EVENT_MASK_BUTTON_DOWN);
 
        GrSelectEvents(newgamewid, GR_EVENT_MASK_EXPOSURE |
                GR_EVENT_MASK_BUTTON_DOWN);
 
        GrSelectEvents(savewid, GR_EVENT_MASK_EXPOSURE |
                GR_EVENT_MASK_BUTTON_DOWN);
 
        setcursor();
 
        GrMapWindow(mainwid);
        GrMapWindow(boardwid);
        GrMapWindow(statwid);
        GrMapWindow(quitwid);
        GrMapWindow(savewid);
        GrMapWindow(newgamewid);
 
        if (!playing)
                newgame();
 
        while (GR_TRUE) {
                GR_EVENT event;
 
                GrGetNextEvent(&event);
                handleevent(&event);
        }
}
 
 
/*
 * Read the next event and handle it.
 */
static void
handleevent(GR_EVENT *ep)
{
        switch (ep->type) {
                case GR_EVENT_TYPE_BUTTON_DOWN:
                        dobutton(&ep->button);
                        break;
 
                case GR_EVENT_TYPE_EXPOSURE:
                        doexposure(&ep->exposure);
                        break;
 
                case GR_EVENT_TYPE_KEY_DOWN:
                        dokey(&ep->keystroke);
                        break;
 
                case GR_EVENT_TYPE_CLOSE_REQ:
                        GrClose();
                        exit(0);
        }
}
 
 
/*
 * Handle exposure events.
 */
static void
doexposure(ep)
        GR_EVENT_EXPOSURE       *ep;
{
        if (ep->wid == boardwid) {
                drawboard();
                return;
        }
 
        if (ep->wid == statwid) {
                drawstatus();
                return;
        }
 
        if (ep->wid == quitwid) {
                drawbutton(quitwid, "QUIT");
                return;
        }
 
        if (ep->wid == savewid) {
                drawbutton(savewid, "SAVE GAME");
                return;
        }
 
        if (ep->wid == newgamewid) {
                drawbutton(newgamewid, "NEW GAME");
                return;
        }
}
 
 
/*
 * Here when we get a button down event.
 */
static void
dobutton(bp)
        GR_EVENT_BUTTON         *bp;
{
        if (bp->wid == boardwid) {
                movetopos(findcell(bp->x, bp->y));
                return;
        }
 
        if (bp->wid == quitwid) {
                GrFillRect(quitwid, xorgc, 0, 0, BUTTONWIDTH, BUTTONHEIGHT);
                GrFlush();
                if (savefile)
                        writegame(savefile);
                GrClose();
                exit(0);
        }
 
        if (bp->wid == savewid) {
                GrFillRect(savewid, xorgc, 0, 0, BUTTONWIDTH, BUTTONHEIGHT);
                GrFlush();
                if (savefile == NULL)
                        savefile = SAVEFILE;
                if (writegame(savefile))
                        write(1, "\007", 1);
                else
                        delay();
                GrFillRect(savewid, xorgc, 0, 0, BUTTONWIDTH, BUTTONHEIGHT);
        }
 
        if (bp->wid == newgamewid) {
                GrFillRect(newgamewid, xorgc, 0, 0, BUTTONWIDTH, BUTTONHEIGHT);
                GrFlush();
                /*if (playing)
                        write(1, "\007", 1);
                else {*/
                        newgame();
                        delay();
                /*}*/
                GrFillRect(newgamewid, xorgc, 0, 0, BUTTONWIDTH, BUTTONHEIGHT);
        }
}
 
 
/*
 * Here when we get a keypress in a window.
 */
static void
dokey(kp)
        GR_EVENT_KEYSTROKE      *kp;
{
        if ((kp->wid != boardwid) || !playing)
                return;
 
        switch (kp->ch) {
                case ' ':                       /* remember or forget mine */
                        togglecell(findcell(kp->x, kp->y));
                        break;
        }
}
 
 
/*
 * Redraw the board.
 */
static void
drawboard()
{
        GR_COORD        row;
        GR_COORD        col;
 
        for (row = 1; row < size; row++) {
                GrLine(boardwid, boardgc, 0, row * yp - 1, size * xp - 1,
                        row * yp - 1);
                GrLine(boardwid, boardgc, row * xp - 1, 0,
                        row * xp - 1, size * yp - 1);
        }
        for (row = 0; row < FULLSIZE; row++) {
                for (col = 0; col < FULLSIZE; col++) {
                        drawcell(boardpos(row, col));
                }
        }
}
 
 
/*
 * Draw a cell on the board.
 */
static void
drawcell(pos)
        POS             pos;            /* position to be drawn */
{
        GR_COORD        x;
        GR_COORD        y;
        GR_SIZE         chwidth;
        GR_SIZE         chheight;
        GR_SIZE         chbase;
        CELL            cell;
        GR_CHAR         ch;
 
        cell = board[pos];
        if (!isknown(cell))
                return;
 
        ch = displaychar(cell);
        if (ch == F_WRONG) {
                drawbomb(pos, greengc, GR_FALSE);
                return;
        }
 
        if (isold(cell)) {
                clearcell(pos);
                cellcenter(pos, &x, &y);
                GrGetGCTextSize(boardgc, &ch, 1, GR_TFASCII, &chwidth,
                        &chheight, &chbase);
                GrText(boardwid, boardgc, x - chwidth / 2 + 1,
                        y + chheight / 2, &ch, 1, GR_TFBOTTOM);
                return;
        }
 
        drawbomb(pos, redgc, GR_FALSE);
}
 
 
/*
 * Clear a particular cell.
 */
static void
clearcell(pos)
        POS             pos;            /* position to be cleared */
{
        GR_COORD        row;
        GR_COORD        col;
 
        row = pos / FULLSIZE;
        col = pos % FULLSIZE;
        GrFillRect(boardwid, cleargc, col * xp - xp, row * yp - yp,
                xp - 1, yp - 1);
}
 
 
/*
 * Draw a bomb in a window using the specified GC.
 * The bomb is animated and the terminal is beeped if necessary.
 */
static void
drawbomb(pos, gc, animate)
        POS             pos;            /* position to draw bomb at */
        GR_GC_ID        gc;             /* GC for drawing (red or green) */
        GR_BOOL         animate;        /* TRUE to animate the bomb */
{
        GR_COORD        x;
        GR_COORD        y;
        GR_COUNT        count;
 
        if (animate)
                write(1, "\007", 1);
 
        cellcenter(pos, &x, &y);
 
        count = (animate ? 8 : 1);
        for (;;) {
                GrFillEllipse(boardwid, gc, x, y, xp / 2 - 3, yp / 2 - 3);
                if (--count == 0)
                        return;
                delay();
                clearcell(pos);
                delay();
        }
}
 
 
/*
 * Draw a button which has a specified label string centered in it.
 */
static void
drawbutton(window, label)
        GR_WINDOW_ID    window;
        char            *label;
{
        GR_SIZE         width;
        GR_SIZE         height;
        GR_SIZE         base;
 
        GrGetGCTextSize(buttongc, label, strlen(label), GR_TFASCII, &width,
                &height, &base);
        GrText(window, buttongc, (BUTTONWIDTH - width) / 2,
                (BUTTONHEIGHT - height) / 2 + height - 1,
                label, -1, GR_TFBOTTOM);
}
 
 
/*
 * Set the cursor as appropriate.
 * The cursor changes depending on the number of legs left.
 */
static void
setcursor()
{
        GR_BITMAP       *fgbits;        /* bitmap for foreground */
        GR_BITMAP       *bgbits;        /* bitmap for background */
 
        switch (legs) {
                case 0:
                        fgbits = noleg_fg;
                        bgbits = noleg_bg;
                        break;
                case 1:
                        fgbits = oneleg_fg;
                        bgbits = oneleg_bg;
                        break;
                default:
                        fgbits = twolegs_fg;
                        bgbits = twolegs_bg;
                        break;
        }
        GrSetCursor(boardwid, 9, 12, 4, 6, WHITE, BLACK, fgbits, bgbits);
}
 
 
/*
 * Delay for a while so that something can be seen.
 * This is done by drawing a large rectangle over the window using a mode
 * of XOR with the value of 0, (which does nothing except waste time).
 */
static void
delay()
{
        GR_COUNT        i;
 
        for (i = 0; i < 1; i++) {
                GrFillRect(boardwid, delaygc, 0, 0, xp * size - 1,
                        yp * size - 1);
                GrFlush();
        }
}
 
 
/*
 * Calculate the coordinates of the center of a cell on the board.
 * The coordinates are relative to the origin of the board window.
 */
static void
cellcenter(pos, retx, rety)
        POS             pos;            /* position to find center of */
        GR_COORD        *retx;          /* returned X coordinate */
        GR_COORD        *rety;          /* returned Y coordinate */
{
        *retx = (pos % FULLSIZE) * xp - 1 - xp / 2;
        *rety = (pos / FULLSIZE) * yp - 1 - yp / 2;
}
 
 
/*
 * Draw the status information in the status window.
 */
static void
drawstatus()
{
        long    score;
        long    allsteps;
        long    games;
 
        score = 0;
        games = games0[index];
        allsteps = steps0[index];
        score += games1[index];
        games += games1[index];
        allsteps += steps1[index];
        score += games2[index] * 2;
        games += games2[index];
        allsteps += steps2[index];
 
        printline(0, "Size:   %2d\n", size);
        printline(1, "Mines: %3d\n", mines);
        PRINTSTEPS;
        printline(3, "Legs:    %d\n", legs);
 
        printline(5, "Won games:  %3d\n", games2[index]);
        printline(6, "1-leg games:%3d\n", games1[index]);
        printline(7, "Lost games: %3d\n", games0[index]);
 
        if (games) {
                printline(9, "Legs/game: %3d.%03d\n", score / games,
                        ((score * 1000) / games) % 1000);
 
                printline(10, "Steps/game:%3d.%03d\n", allsteps / games,
                        ((allsteps * 1000) / games) % 1000);
        }
}
 
 
/*
 * Printf routine for windows, which can print at particular lines.
 * A negative line number means continue printing at the previous location.
 * Assumes the status window for output.
 */
static void printline(GR_COORD row, char * fmt, ...)
{
        va_list         ap;
        GR_COUNT        cc;
        GR_SIZE         width;
        char            *cp;
        char            buf[256];
 
        va_start(ap, fmt);
        vsprintf(buf, fmt, ap);
        va_end(ap);
 
        if (row >= 0) {
                charxpos = 0;
                charypos = charheight * row + charheight - 1;
        }
 
        cp = buf;
        for (;;) {
                cc = 0;
                width = 0;
                while (*cp >= ' ') {
                        width += fi.widths[(int)*cp++];
                        cc++;
                }
                if (width) {
                        GrText(statwid, statgc, charxpos, charypos,
                                cp - cc, cc, GR_TFBOTTOM);
                        charxpos += width;
                }
 
                switch (*cp++) {
                        case '\0':
                                return;
                        case '\n':
                                newline();
                                break;
                        case '\r':
                                charxpos = 0;
                                break;
                }
        }
}
 
 
/*
 * Clear the remainder of the line and move to the next line.
 * This assumes output is in the status window.
 */
static void
newline()
{
        GrFillRect(statwid, blackgc, charxpos, charypos - charheight + 1,
                statwidth - charxpos, charheight);
        charxpos = 0;
        charypos += charheight;
}
 
 
/*
 * Translate a board window coordinate into a cell position.
 * If the coordinate is outside of the window, or exactly on one
 * of the interior lines, then a coordinate of 0 is returned.
 */
static POS
findcell(x, y)
        GR_COORD        x;
        GR_COORD        y;
{
        GR_COORD        row;
        GR_COORD        col;
 
        if (((x % xp) == 0) || ((y % yp) == 0))
                return 0;
        row = (y / yp) + 1;
        col = (x / xp) + 1;
        if ((row <= 0) || (row > size) || (col <= 0) || (col > size))
                return 0;
        return boardpos(row, col);
}
 
 
/*
 * Initialize the board for playing
 */
static void
newgame()
{
        GR_COORD        row;
        GR_COORD        col;
        GR_COUNT        count;
        CELL            cell;
        POS             pos;
 
        for (row = 0; row < FULLSIZE; row++) {
                for (col = 0; col < FULLSIZE; col++) {
                        cell = F_EMPTY;
                        if (badsquare(row) || badsquare(col))
                                cell |= F_EDGE;
                        board[boardpos(row, col)] = cell;
                }
        }
 
        playing = GR_TRUE;
        count = 0;
        legs = 2;
        steps = 0;
        drawstatus();
        setcursor();
 
        while (count < mines) {
                do {
                        row = (rand() / 16) % (size * size + 1);
                } while (row == (size * size));
 
                col = (row % size) + 1;
                row = (row / size) + 1;
                pos = boardpos(row, col);
 
                if ((pos == boardpos(1,1)) || (pos == boardpos(1,2)) ||
                        (pos == boardpos(2,1)) || (pos == boardpos(2,2)) ||
                        (pos == boardpos(size,size)))
                                continue;
 
                if (!ismine(board[pos]) && checkpath(pos))
                        count++;
        }
 
        board[boardpos(1,1)] = (F_OLD | '0');
 
        GrClearWindow(boardwid, GR_TRUE);
}
 
 
/*
 * Check to see if there is still a path from the top left corner to the
 * bottom right corner, if a new mine is placed at the indicated position.
 * Returns GR_TRUE if mine was successfully placed.
 */
static GR_BOOL
checkpath(pos)
        POS             pos;            /* position to place mine at */
{
        CELL            *bp;            /* current board position */
        CELL            *endbp;         /* ending position */
        POS             endpos;         /* ending position */
        GR_COUNT        count;          /* number of neighbors */
        GR_COUNT        i;              /* loop counter */
        GR_BOOL         more;           /* GR_TRUE if new square reached */
 
        /*
         * Begin by assuming there is a mine at the specified location,
         * and then count neighbors.  If there are less than two other
         * mines or edge squares, then there must still be a path.
         */
        board[pos] |= F_MINE;
 
        count = 0;
 
        for (i = 7; i >= 0; i--) {
                if (board[pos + steptable[i]] & (F_MINE | F_EDGE))
                count++;
        }
 
        if (count < 2)
                return GR_TRUE;
 
        /*
         * Two or more neighbors, so we must do the full check.
         * First clear the reach flag, except for the top left corner.
         */
        endpos = boardpos(size, size);
        bp = &board[endpos];
        endbp = bp;
        while (bp != board)
                *bp-- &= ~F_REACH;
        board[boardpos(1,1)] |= F_REACH;
 
        /*
         * Now loop looking for new squares next to already reached squares.
         * Stop when no more changes are found, or when the lower right
         * corner is reached.
         */
        do {
                more = GR_FALSE;
                for (bp = &board[boardpos(1,1)]; bp != endbp; bp++) {
                        if (*bp & F_REACH) {
                                for (i = 7; i >= 0; i--) {
                                        if ((bp[steptable[i]] & (F_MINE | F_REACH | F_EDGE)) == 0) {
                                                bp[steptable[i]] |= F_REACH;
                                                more = GR_TRUE;
                                        }
                                }
                        }
                }
 
                if (board[endpos] & F_REACH)
                        return GR_TRUE;
        } while (more);
 
        /*
         * Cannot reach the lower right corner, so remove the mine and fail.
         */
        board[pos] &= ~F_MINE;
 
        return GR_FALSE;
}
 
 
/*
 * Move to a particular position and see if we hit a mine.
 * If not, then count the number of mines adjacent to us so it can be seen.
 * If we are stepping onto a location where we remembered a mine is at,
 * then don't do it.  Moving is only allowed to old locations, or to
 * locations adjacent to old ones.
 */
static void
movetopos(newpos)
        POS             newpos;         /* position to move to */
{
        POS             fixpos;         /* position to fix up */
        CELL            cell;           /* current cell */
        GR_COUNT        count;          /* count of cells */
        GR_COUNT        i;              /* index for neighbors */
 
        if ((newpos < 0) || (newpos >= (FULLSIZE * FULLSIZE)) || !playing)
                return;
 
        cell = board[newpos];
 
        if (isedge(cell) || (isseen(cell)) || isold(cell))
                return;
 
        count = isold(cell);
        for (i = 0; i < 8; i++)
                if (isold(board[newpos + steptable[i]]))
                        count++;
 
        if (count <= 0)
                return;
 
        cell = (cell & F_FLAGS) | F_OLD;
        steps++;
 
        PRINTSTEPS;
 
        if (ismine(cell)) {             /* we hit a mine */
                legs--;
                board[newpos] = (F_REMEMBER | F_MINE);
                cell = (F_EMPTY | F_OLD);
                board[newpos] = cell;
                drawbomb(newpos, redgc, GR_TRUE);
                clearcell(newpos);
                setcursor();
                for (i = 0; i < 8; i++) {
                        fixpos = newpos + steptable[i];
                        if (isold(board[fixpos])) {
                                board[fixpos]--;
                                drawcell(fixpos);
                        }
                }
                drawstatus();
        }
 
        count = 0;
        for (i = 0; i < 8; i++)
                if (ismine(board[newpos + steptable[i]]))
                        count++;
        board[newpos] = cell | (count + '0');
 
        drawcell(newpos);
 
        if ((legs <= 0) || (newpos == boardpos(size,size)))
                gameover();
}
 
 
/*
 * Remember or forget the location of a mine.
 * This is for informational purposes only and does not affect anything.
 */
static void
togglecell(pos)
        POS     pos;            /* position to toggle */
{
        CELL    cell;
 
        if ((pos <= 0) || !playing)
                return;
 
        cell = board[pos];
        if (isknown(cell)) {
                if (!isseen(cell))
                        return;
                board[pos] = (board[pos] & F_FLAGS) | F_EMPTY;
                clearcell(pos);
                return;
        }
 
        board[pos] = (board[pos] & F_FLAGS) | F_REMEMBER;
        drawcell(pos);
}
 
 
/*
 * Here when the game is over.
 * Show where the mines are, and give the results.
 */
static void
gameover()
{
        POS     pos;
        CELL    cell;
 
        playing = GR_FALSE;
        switch (legs) {
                case 0:
                        games0[index]++;
                        steps0[index] += steps;
                        break;
                case 1:
                        games1[index]++;
                        steps1[index] += steps;
                        break;
                case 2:
                        games2[index]++;
                        steps2[index] += steps;
                        break;
        }
 
        for (pos = 0; pos < (FULLSIZE * FULLSIZE); pos++) {
                cell = board[pos];
                if (isseen(cell))
                        cell = (cell & F_FLAGS) | F_WRONG;
                if (ismine(cell))
                        cell = (cell & F_FLAGS) | F_REMEMBER;
                board[pos] = cell;
        }
 
        drawboard();
        drawstatus();
}
 
 
/*
 * Search the game parameter table for the current board size and
 * number of mines, and set the index for those parameters so that
 * the statistics can be accessed.  Allocates a new index if necessary.
 */
static void
findindex()
{
        for (index = 0; index < MAXPARAMS; index++) {
                if ((sizeparam[index] == size) && (mineparam[index] == mines))
                        return;
        }
        for (index = 0; index < MAXPARAMS; index++) {
                if (sizeparam[index] == 0) {
                        sizeparam[index] = size;
                        mineparam[index] = mines;
                        return;
                }
        }
        fprintf(stderr, "Too many parameters in save file\n");
        exit(1);
}
 
 
/*
 * Read in a saved game if available, otherwise start from scratch.
 * Exits if an error is encountered.
 */
static void
readgame(name)
        char    *name;          /* filename */
{
        int     fd;
 
        fd = -1;
        if (name)
                fd = open(name, 0);
 
        if (fd < 0) {
                magic = MAGIC;
                size = SIZE;
                mines = (size * size * MINEPERCENT) / 100;
                playing = GR_FALSE;
                return;
        }
 
        if (read(fd, &st, sizeof(st)) != sizeof(st))
                magic = 0;
        close(fd);
 
        if ((magic != MAGIC) || (size > MAXSIZE)) {
                fprintf(stderr, "Save file format is incorrect\n");
                exit(1);
        }
}
 
 
/*
 * Write the current game to a file.
 * Returns nonzero on an error.
 */
static GR_BOOL
writegame(name)
        char    *name;          /* filename */
{
        int     fd;
 
        if (name == NULL)
                return GR_TRUE;
 
        fd = creat(name, 0666);
        if (fd < 0)
                return GR_TRUE;
 
        if (write(fd, &st, sizeof(st)) != sizeof(st)) {
                close(fd);
                return GR_TRUE;
        }
        close(fd);
        return GR_FALSE;
}
 
/* END CODE */
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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [services/] [gfx/] [mw/] [v2_0/] [src/] [demos/] [nanox/] [landmine.c] - Blame information for rev 365

Line No.	Rev	Author	Line
1	27	unneback	`/*`
2			`* Landmine, the game.`
3			`* Written for mini-X by David I. Bell.`
4			`*/`
5
6			`#include <stdio.h>`
7			`#include <stdarg.h>`
8			`#include <stdlib.h>`
9			`#if UNIX \| DOS_DJGPP`
10			`#include <fcntl.h>`
11			`#include <unistd.h>`
12			`#include <time.h>`
13			`#endif`
14			`#define MWINCLUDECOLORS`
15			`#include "nano-X.h"`
16
17
18			`#define MINSIZE 3 /* minimum size of board */`
19			`#define MAXSIZE 30 /* maximum size of board */`
20			`#define SIZE 15 /* default size of playing board */`
21			`#define MINEPERCENT 15 /* default percentage of mines */`
22			`#define SAVEFILE "landmine.save" /* default save file name */`
23			`#define MAGIC 649351261 /* magic number in save files */`
24			`#define MAXPARAMS 1000 /* maximum different game parameters */`
25
26			`#define FULLSIZE (MAXSIZE + 2) /* board size including borders */`
27
28			`#ifdef __ECOS`
29			`/* 240x320 screen values*/`
30			`#define BOARDGAP 2 /* millimeter gap around board */`
31			`#define RIGHTGAP 2 /* mm gap between board, right side */`
32			`#define BUTTONGAP 5 /* mm gap between buttons */`
33			`#define STATUSGAP 10 /* mm gap between buttons and status */`
34
35			`#define BUTTONWIDTH 80 /* width of buttons (pixels) */`
36			`#define BUTTONHEIGHT 25 /* height of buttons (pixels) */`
37			`#define RIGHTSIDE 90 /* pixels to guarantee for right side */`
38			`#define BOARDBORDER 2 /* border size around board */`
39			`#else`
40			`#define BOARDGAP 10 /* millimeter gap around board */`