diff options
Diffstat (limited to 'bs')
| -rw-r--r-- | bs/Makefile | 10 | ||||
| -rw-r--r-- | bs/bs.6 | 76 | ||||
| -rw-r--r-- | bs/bs.c | 1196 |
3 files changed, 1282 insertions, 0 deletions
diff --git a/bs/Makefile b/bs/Makefile new file mode 100644 index 0000000..b7d56ae --- /dev/null +++ b/bs/Makefile @@ -0,0 +1,10 @@ +# $FreeBSD: src/games/bs/Makefile,v 1.5.2.1 2001/04/25 09:28:49 ru Exp $ +# $DragonFly: src/games/bs/Makefile,v 1.4 2006/10/08 16:22:35 pavalos Exp $ + +PROG= bs +MAN= bs.6 +DPADD= ${LIBNCURSES} +LDADD= -lncurses +HIDEGAME=hidegame + +.include <bsd.prog.mk> @@ -0,0 +1,76 @@ +.\" $FreeBSD: src/games/bs/bs.6,v 1.1.1.1.12.1 2001/07/22 11:32:10 dd Exp $ +.Dd August 23, 1989 +.Dt BS 6 +.Os +.Sh NAME +.Nm bs +.Nd battleships game +.Sh SYNOPSIS +.Nm +.Op Fl bsc +.Sh DESCRIPTION +This program allows you to play the familiar Battleships game against the +computer on a 10x10 board. +The interface is visual and largely self-explanatory; +you place your ships and pick your shots by moving the +cursor around the +.Sq sea +with the +.Xr rogue 6 +/ +.Xr hack 6 +motion keys +.Dq hjklyubn . +.Pp +Note that when selecting a ship to place, you must type the capital letter +(these are, after all, capital ships). +During ship placement, the `r' command may be used to ignore the current +position and randomly place your currently selected ship. +The `R' command will place all remaining ships randomly. +The \&^L command (form feed, ASCII 12) will force a screen redraw). +.Pp +The command-line arguments control game modes. +.Bl -tag -width ".Fl b" +.It Fl b +selects a +.Dq blitz +variant +.It Fl s +selects a +.Dq salvo +variant +.It Fl c +permits ships to be placed adjacently +.El +.Pp +The +.Dq blitz +variant allows a side to shoot for as long as it continues to score hits. +.Pp +The +.Dq salvo +game allows a player one shot per turn for each of his/her ships still afloat. +This puts a premium scoring hits early and knocking out some +ships and also makes much harder the situation where you face a superior force +with only your PT-boat. +.Pp +Normally, ships must be separated by at least one square of open water. +The +.Fl c +option disables this check and allows them to close-pack. +.Pp +The algorithm the computer uses once it has found a ship to sink is provably +optimal. +The dispersion criterion for the random-fire algorithm may not be. +.Sh AUTHORS +.An -nosplit +Originally written by one +.An Bruce Holloway +in 1986. +Salvo mode added by +.An Chuck A. DeGaul Aq cbosgd!cad . +Visual user interface, +.Sq closepack +option, code rewrite and manual page by +.An Eric S. Raymond Aq Mt esr@snark.thyrsus.com , +August 1989. @@ -0,0 +1,1196 @@ +/*- + * bs.c - original author: Bruce Holloway + * salvo option by: Chuck A DeGaul + * with improved user interface, autoconfiguration and code cleanup + * by Eric S. Raymond <esr@snark.thyrsus.com> + * v1.2 with color support and minor portability fixes, November 1990 + * v2.0 featuring strict ANSI/POSIX conformance, November 1993. + * + * $FreeBSD: src/games/bs/bs.c,v 1.9 2000/02/21 03:07:31 billf Exp $ + * $DragonFly: src/games/bs/bs.c,v 1.7 2007/04/18 18:32:12 swildner Exp $ + */ + +#include <assert.h> +#include <ctype.h> +#include <ncurses.h> +#include <signal.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +/* + * Constants for tuning the random-fire algorithm. It prefers moves that + * diagonal-stripe the board with a stripe separation of srchstep. If + * no such preferred moves are found, srchstep is decremented. + */ +#define BEGINSTEP 3 /* initial value of srchstep */ + +/* miscellaneous constants */ +#define SHIPTYPES 5 +#define OTHER (1-turn) +#define PLAYER 0 +#define COMPUTER 1 +#define MARK_HIT 'H' +#define MARK_MISS 'o' +#define CTRLC '\003' /* used as terminate command */ +#define FF '\014' /* used as redraw command */ + +/* coordinate handling */ +#define BWIDTH 10 +#define BDEPTH 10 + +/* display symbols */ +#define SHOWHIT '*' +#define SHOWSPLASH ' ' +#define IS_SHIP(c) isupper(c) + +/* how to position us on player board */ +#define PYBASE 3 +#define PXBASE 3 +#define PY(y) (PYBASE + (y)) +#define PX(x) (PXBASE + (x)*3) +#define pgoto(y, x) move(PY(y), PX(x)) + +/* how to position us on cpu board */ +#define CYBASE 3 +#define CXBASE 48 +#define CY(y) (CYBASE + (y)) +#define CX(x) (CXBASE + (x)*3) +#define cgoto(y, x) move(CY(y), CX(x)) + +#define ONBOARD(x, y) (x >= 0 && x < BWIDTH && y >= 0 && y < BDEPTH) + +/* other board locations */ +#define COLWIDTH 80 +#define PROMPTLINE 21 /* prompt line */ +#define SYBASE CYBASE + BDEPTH + 3 /* move key diagram */ +#define SXBASE 63 +#define MYBASE SYBASE - 1 /* diagram caption */ +#define MXBASE 64 +#define HYBASE SYBASE - 1 /* help area */ +#define HXBASE 0 + +/* this will need to be changed if BWIDTH changes */ +static char numbers[] = " 0 1 2 3 4 5 6 7 8 9"; + +static char carrier[] = "Aircraft Carrier"; +static char battle[] = "Battleship"; +static char sub[] = "Submarine"; +static char destroy[] = "Destroyer"; +static char ptboat[] = "PT Boat"; + +static char name[40]; +static char dftname[] = "stranger"; + +/* direction constants */ +enum directions { E, SE, S, SW, W, NW, N, NE }; +static int xincr[8] = {1, 1, 0, -1, -1, -1, 0, 1}; +static int yincr[8] = {0, 1, 1, 1, 0, -1, -1, -1}; + +/* current ship position and direction */ +static int curx = (BWIDTH / 2); +static int cury = (BDEPTH / 2); + +typedef struct { + char *name; /* name of the ship type */ + char hits; /* how many times has this ship been hit? */ + char symbol; /* symbol for game purposes */ + char length; /* length of ship */ + char x, y; /* coordinates of ship start point */ + enum directions dir; /* direction of `bow' */ + bool placed; /* has it been placed on the board? */ +} +ship_t; + +ship_t plyship[SHIPTYPES] = +{ + { carrier, 0, 'A', 5, 0, 0, E, FALSE}, + { battle, 0, 'B', 4, 0, 0, E, FALSE}, + { destroy, 0, 'D', 3, 0, 0, E, FALSE}, + { sub, 0, 'S', 3, 0, 0, E, FALSE}, + { ptboat, 0, 'P', 2, 0, 0, E, FALSE}, +}; + +ship_t cpuship[SHIPTYPES] = +{ + { carrier, 0, 'A', 5, 0, 0, E, FALSE}, + { battle, 0, 'B', 4, 0, 0, E, FALSE}, + { destroy, 0, 'D', 3, 0, 0, E, FALSE}, + { sub, 0, 'S', 3, 0, 0, E, FALSE}, + { ptboat, 0, 'P', 2, 0, 0, E, FALSE}, +}; + +/* "Hits" board, and main board. */ +static char hits[2][BWIDTH][BDEPTH], board[2][BWIDTH][BDEPTH]; + +static int turn; /* 0=player, 1=computer */ +static int plywon=0, cpuwon=0; /* How many games has each won? */ + +static int salvo, blitz, closepack; + +#define PR addstr + +static void prompt(int, const char *, ...) __printflike(2, 3); +static bool checkplace (int, ship_t *, int); +static int getcoord (int); +int playagain (void); + +/* end the game, either normally or due to signal */ +static void +uninitgame(void) +{ + clear(); + refresh(); + resetterm(); + echo(); + endwin(); + exit(0); +} + +static void +sighandler(__attribute__((unused)) int sig) +{ + uninitgame(); +} + +/* announce which game options are enabled */ +static void +announceopts(void) +{ + printw("Playing %s game (", (salvo || blitz || closepack) ? + "optional" : "standard"); + + if (salvo) + printw("salvo, "); + else + printw("nosalvo, "); + + if (blitz) + printw("blitz, "); + else + printw("noblitz, "); + + if (closepack) + printw("closepack)"); + else + printw("noclosepack)"); +} + +static void +intro(void) +{ + char *tmpname; + + srandomdev(); + + tmpname = getlogin(); + signal(SIGINT,sighandler); + signal(SIGINT,sighandler); + signal(SIGIOT,sighandler); /* for assert(3) */ + if(signal(SIGQUIT,SIG_IGN) != SIG_IGN) + signal(SIGQUIT,sighandler); + + if(tmpname != '\0') { + strcpy(name,tmpname); + name[0] = toupper(name[0]); + } else { + strcpy(name,dftname); + } + + initscr(); +#ifdef KEY_MIN + keypad(stdscr, TRUE); +#endif /* KEY_MIN */ + saveterm(); + nonl(); + cbreak(); + noecho(); + +#ifdef PENGUIN + clear(); + mvaddstr(4,29,"Welcome to Battleship!"); + move(8,0); + PR(" \\\n"); + PR(" \\ \\ \\\n"); + PR(" \\ \\ \\ \\ \\_____________\n"); + PR(" \\ \\ \\_____________ \\ \\/ |\n"); + PR(" \\ \\/ \\ \\/ |\n"); + PR(" \\/ \\_____/ |__\n"); + PR(" ________________/ |\n"); + PR(" \\ S.S. Penguin |\n"); + PR(" \\ /\n"); + PR(" \\___________________________________________________/\n"); + + mvaddstr(22,27,"Hit any key to continue..."); refresh(); + getch(); +#endif /* PENGUIN */ + +#ifdef A_COLOR + start_color(); + + init_pair(COLOR_BLACK, COLOR_BLACK, COLOR_BLACK); + init_pair(COLOR_GREEN, COLOR_GREEN, COLOR_BLACK); + init_pair(COLOR_RED, COLOR_RED, COLOR_BLACK); + init_pair(COLOR_CYAN, COLOR_CYAN, COLOR_BLACK); + init_pair(COLOR_WHITE, COLOR_WHITE, COLOR_BLACK); + init_pair(COLOR_MAGENTA, COLOR_MAGENTA, COLOR_BLACK); + init_pair(COLOR_BLUE, COLOR_BLUE, COLOR_BLACK); + init_pair(COLOR_YELLOW, COLOR_YELLOW, COLOR_BLACK); +#endif /* A_COLOR */ + +} + +/* print a message at the prompt line */ +static void +prompt(int n, const char *f, ...) +{ + char buf[COLWIDTH + 1]; + va_list ap; + + va_start(ap, f); + move(PROMPTLINE + n, 0); + clrtoeol(); + vsnprintf(buf, COLWIDTH + 1, f, ap); + printw("%s", buf); + refresh(); + va_end(ap); +} + +static void +error(const char *s) +{ + move(PROMPTLINE + 2, 0); + clrtoeol(); + if (s) { + addstr(s); + beep(); + } +} + +static void +placeship(int b, ship_t *ss, int vis) +{ + int l; + + for(l = 0; l < ss->length; ++l) { + int newx = ss->x + l * xincr[ss->dir]; + int newy = ss->y + l * yincr[ss->dir]; + + board[b][newx][newy] = ss->symbol; + if (vis) { + pgoto(newy, newx); + addch((chtype)ss->symbol); + } + } + ss->hits = 0; +} + +static int +rnd(int n) +{ + return(random() % n); +} + +/* generate a valid random ship placement into px,py */ +static void +randomplace(int b, ship_t *ss) +{ + do { + ss->y = rnd(BDEPTH); + ss->x = rnd(BWIDTH); + ss->dir = rnd(2) ? E : S; + } while (!checkplace(b, ss, FALSE)); +} + +static void +initgame(void) +{ + int i, j, unplaced; + ship_t *ss; + + clear(); + mvaddstr(0,35,"BATTLESHIPS"); + move(PROMPTLINE + 2, 0); + announceopts(); + + bzero(board, sizeof(char) * BWIDTH * BDEPTH * 2); + bzero(hits, sizeof(char) * BWIDTH * BDEPTH * 2); + for (i = 0; i < SHIPTYPES; i++) { + ss = cpuship + i; + ss->x = ss->y = ss->dir = ss->hits = ss->placed = 0; + ss = plyship + i; + ss->x = ss->y = ss->dir = ss->hits = ss->placed = 0; + } + + /* draw empty boards */ + mvaddstr(PYBASE - 2, PXBASE + 5, "Main Board"); + mvaddstr(PYBASE - 1, PXBASE - 3,numbers); + for(i=0; i < BDEPTH; ++i) + { + mvaddch(PYBASE + i, PXBASE - 3, i + 'A'); +#ifdef A_COLOR + if (has_colors()) + attron(COLOR_PAIR(COLOR_BLUE)); +#endif /* A_COLOR */ + addch(' '); + for (j = 0; j < BWIDTH; j++) + addstr(" . "); +#ifdef A_COLOR + attrset(0); +#endif /* A_COLOR */ + addch(' '); + addch(i + 'A'); + } + mvaddstr(PYBASE + BDEPTH, PXBASE - 3,numbers); + mvaddstr(CYBASE - 2, CXBASE + 7,"Hit/Miss Board"); + mvaddstr(CYBASE - 1, CXBASE - 3, numbers); + for(i=0; i < BDEPTH; ++i) + { + mvaddch(CYBASE + i, CXBASE - 3, i + 'A'); +#ifdef A_COLOR + if (has_colors()) + attron(COLOR_PAIR(COLOR_BLUE)); +#endif /* A_COLOR */ + addch(' '); + for (j = 0; j < BWIDTH; j++) + addstr(" . "); +#ifdef A_COLOR + attrset(0); +#endif /* A_COLOR */ + addch(' '); + addch(i + 'A'); + } + + mvaddstr(CYBASE + BDEPTH,CXBASE - 3,numbers); + + mvprintw(HYBASE, HXBASE, + "To position your ships: move the cursor to a spot, then"); + mvprintw(HYBASE+1,HXBASE, + "type the first letter of a ship type to select it, then"); + mvprintw(HYBASE+2,HXBASE, + "type a direction ([hjkl] or [4862]), indicating how the"); + mvprintw(HYBASE+3,HXBASE, + "ship should be pointed. You may also type a ship letter"); + mvprintw(HYBASE+4,HXBASE, + "followed by `r' to position it randomly, or type `R' to"); + mvprintw(HYBASE+5,HXBASE, + "place all remaining ships randomly."); + + mvaddstr(MYBASE, MXBASE, "Aiming keys:"); + mvaddstr(SYBASE, SXBASE, "y k u 7 8 9"); + mvaddstr(SYBASE+1, SXBASE, " \\|/ \\|/ "); + mvaddstr(SYBASE+2, SXBASE, "h-+-l 4-+-6"); + mvaddstr(SYBASE+3, SXBASE, " /|\\ /|\\ "); + mvaddstr(SYBASE+4, SXBASE, "b j n 1 2 3"); + + /* have the computer place ships */ + for(ss = cpuship; ss < cpuship + SHIPTYPES; ss++) + { + randomplace(COMPUTER, ss); + placeship(COMPUTER, ss, FALSE); + } + + ss = NULL; + do { + char c, docked[SHIPTYPES + 2], *cp = docked; + + /* figure which ships still wait to be placed */ + *cp++ = 'R'; + for (i = 0; i < SHIPTYPES; i++) + if (!plyship[i].placed) + *cp++ = plyship[i].symbol; + *cp = '\0'; + + /* get a command letter */ + prompt(1, "Type one of [%s] to pick a ship.", docked+1); + do { + c = getcoord(PLAYER); + } while + (!strchr(docked, c)); + + if (c == 'R') + ungetch('R'); + else + { + /* map that into the corresponding symbol */ + for (ss = plyship; ss < plyship + SHIPTYPES; ss++) + if (ss->symbol == c) + break; + + prompt(1, "Type one of [hjklrR] to place your %s.", ss->name); + pgoto(cury, curx); + } + + do { + c = getch(); + } while + (!strchr("hjklrR", c) || c == FF); + + if (c == FF) + { + clearok(stdscr, TRUE); + refresh(); + } + else if (c == 'r') + { + prompt(1, "Random-placing your %s", ss->name); + randomplace(PLAYER, ss); + placeship(PLAYER, ss, TRUE); + error(NULL); + ss->placed = TRUE; + } + else if (c == 'R') + { + prompt(1, "Placing the rest of your fleet at random..."); + for (ss = plyship; ss < plyship + SHIPTYPES; ss++) + if (!ss->placed) + { + randomplace(PLAYER, ss); + placeship(PLAYER, ss, TRUE); + ss->placed = TRUE; + } + error(NULL); + } + else if (strchr("hjkl8462", c)) + { + ss->x = curx; + ss->y = cury; + + switch(c) + { + case 'k': case '8': ss->dir = N; break; + case 'j': case '2': ss->dir = S; break; + case 'h': case '4': ss->dir = W; break; + case 'l': case '6': ss->dir = E; break; + } + + if (checkplace(PLAYER, ss, TRUE)) + { + placeship(PLAYER, ss, TRUE); + error(NULL); + ss->placed = TRUE; + } + } + + for (unplaced = i = 0; i < SHIPTYPES; i++) + unplaced += !plyship[i].placed; + } while + (unplaced); + + turn = rnd(2); + + mvprintw(HYBASE, HXBASE, + "To fire, move the cursor to your chosen aiming point "); + mvprintw(HYBASE+1, HXBASE, + "and strike any key other than a motion key. "); + mvprintw(HYBASE+2, HXBASE, + " "); + mvprintw(HYBASE+3, HXBASE, + " "); + mvprintw(HYBASE+4, HXBASE, + " "); + mvprintw(HYBASE+5, HXBASE, + " "); + + prompt(0, "Press any key to start..."); + getch(); +} + +static int +getcoord(int atcpu) +{ + int ny, nx, c; + + if (atcpu) + cgoto(cury,curx); + else + pgoto(cury, curx); + refresh(); + for (;;) + { + if (atcpu) + { + mvprintw(CYBASE + BDEPTH+1, CXBASE+11, "(%d, %c)", curx, 'A'+cury); + cgoto(cury, curx); + } + else + { + mvprintw(PYBASE + BDEPTH+1, PXBASE+11, "(%d, %c)", curx, 'A'+cury); + pgoto(cury, curx); + } + + switch(c = getch()) + { + case 'k': case '8': +#ifdef KEY_MIN + case KEY_UP: +#endif /* KEY_MIN */ + ny = cury+BDEPTH-1; nx = curx; + break; + case 'j': case '2': +#ifdef KEY_MIN + case KEY_DOWN: +#endif /* KEY_MIN */ + ny = cury+1; nx = curx; + break; + case 'h': case '4': +#ifdef KEY_MIN + case KEY_LEFT: +#endif /* KEY_MIN */ + ny = cury; nx = curx+BWIDTH-1; + break; + case 'l': case '6': +#ifdef KEY_MIN + case KEY_RIGHT: +#endif /* KEY_MIN */ + ny = cury; nx = curx+1; + break; + case 'y': case '7': +#ifdef KEY_MIN + case KEY_A1: +#endif /* KEY_MIN */ + ny = cury+BDEPTH-1; nx = curx+BWIDTH-1; + break; + case 'b': case '1': +#ifdef KEY_MIN + case KEY_C1: +#endif /* KEY_MIN */ + ny = cury+1; nx = curx+BWIDTH-1; + break; + case 'u': case '9': +#ifdef KEY_MIN + case KEY_A3: +#endif /* KEY_MIN */ + ny = cury+BDEPTH-1; nx = curx+1; + break; + case 'n': case '3': +#ifdef KEY_MIN + case KEY_C3: +#endif /* KEY_MIN */ + ny = cury+1; nx = curx+1; + break; + case FF: + nx = curx; ny = cury; + clearok(stdscr, TRUE); + refresh(); + break; + default: + if (atcpu) + mvaddstr(CYBASE + BDEPTH + 1, CXBASE + 11, " "); + else + mvaddstr(PYBASE + BDEPTH + 1, PXBASE + 11, " "); + return(c); + } + + curx = nx % BWIDTH; + cury = ny % BDEPTH; + } +} + +/* is this location on the selected zboard adjacent to a ship? */ +static int +collidecheck(int b, int y, int x) +{ + int collide; + + /* anything on the square */ + if ((collide = IS_SHIP(board[b][x][y])) != 0) + return(collide); + + /* anything on the neighbors */ + if (!closepack) { + int i; + + for (i = 0; i < 8; i++) { + int xend, yend; + + yend = y + yincr[i]; + xend = x + xincr[i]; + if (ONBOARD(xend, yend)) + collide += IS_SHIP(board[b][xend][yend]); + } + } + + return(collide); +} + +static bool +checkplace(int b, ship_t *ss, int vis) +{ + int l, xend, yend; + + /* first, check for board edges */ + xend = ss->x + (ss->length - 1) * xincr[ss->dir]; + yend = ss->y + (ss->length - 1) * yincr[ss->dir]; + if (!ONBOARD(xend, yend)) { + if (vis) { + switch(rnd(3)) { + case 0: + error("Ship is hanging from the edge of the world"); + break; + case 1: + error("Try fitting it on the board"); + break; + case 2: + error("Figure I won't find it if you put it there?"); + break; + } + } + return(0); + } + + for(l = 0; l < ss->length; ++l) { + if(collidecheck(b, ss->y+l*yincr[ss->dir], ss->x+l*xincr[ss->dir])) { + if (vis) { + switch(rnd(3)) { + case 0: + error("There's already a ship there"); + break; + case 1: + error("Collision alert! Aaaaaagh!"); + break; + case 2: + error("Er, Admiral, what about the other ship?"); + break; + } + } + return(FALSE); + } + } + return(TRUE); +} + +static int +awinna(void) +{ + int i, j; + ship_t *ss; + + for(i=0; i<2; ++i) + { + ss = (i) ? cpuship : plyship; + for(j=0; j < SHIPTYPES; ++j, ++ss) + if(ss->length > ss->hits) + break; + if (j == SHIPTYPES) + return(OTHER); + } + return(-1); +} + +/* a hit on the targeted ship */ +static ship_t * +hitship(int x, int y) +{ + ship_t *sb, *ss; + char sym; + int oldx, oldy; + + getyx(stdscr, oldy, oldx); + sb = (turn) ? plyship : cpuship; + if(!(sym = board[OTHER][x][y])) + return(NULL); + for(ss = sb; ss < sb + SHIPTYPES; ++ss) + if(ss->symbol == sym) + { + if (++ss->hits < ss->length) { /* still afloat? */ + return(NULL); + } else { /* sunk */ + int i, j; + + if (!closepack) { + for (j = -1; j <= 1; j++) { + int bx = ss->x + j * xincr[(ss->dir + 2) % 8]; + int by = ss->y + j * yincr[(ss->dir + 2) % 8]; + + for (i = -1; i <= ss->length; ++i) { + int cx, cy; + + cx = bx + i * xincr[ss->dir]; + cy = by + i * yincr[ss->dir]; + if (ONBOARD(cx, cy)) { + hits[turn][cx][cy] = MARK_MISS; + if (turn % 2 == PLAYER) { + cgoto(cy, cx); +#ifdef A_COLOR + if (has_colors()) + attron(COLOR_PAIR(COLOR_GREEN)); +#endif /* A_COLOR */ + + addch(MARK_MISS); +#ifdef A_COLOR + attrset(0); +#endif /* A_COLOR */ + } + } + } + } + } + + for (i = 0; i < ss->length; ++i) + { + int dx = ss->x + i * xincr[ss->dir]; + int dy = ss->y + i * yincr[ss->dir]; + + hits[turn][dx][dy] = ss->symbol; + if (turn % 2 == PLAYER) + { + cgoto(dy, dx); + addch(ss->symbol); + } + } + + move(oldy, oldx); + return(ss); + } + } + move(oldy, oldx); + return(NULL); +} + +static int +plyturn(void) +{ + ship_t *ss; + bool hit; + char const *m; + + m = NULL; + prompt(1, "Where do you want to shoot? "); + for (;;) + { + getcoord(COMPUTER); + if (hits[PLAYER][curx][cury]) + { + prompt(1, "You shelled this spot already! Try again."); + beep(); + } + else + break; + } + hit = IS_SHIP(board[COMPUTER][curx][cury]); + hits[PLAYER][curx][cury] = hit ? MARK_HIT : MARK_MISS; + cgoto(cury, curx); +#ifdef A_COLOR + if (has_colors()) { + if (hit) + attron(COLOR_PAIR(COLOR_RED)); + else + attron(COLOR_PAIR(COLOR_GREEN)); + } +#endif /* A_COLOR */ + addch((chtype)hits[PLAYER][curx][cury]); +#ifdef A_COLOR + attrset(0); +#endif /* A_COLOR */ + + prompt(1, "You %s.", hit ? "scored a hit" : "missed"); + if(hit && (ss = hitship(curx, cury))) + { + switch(rnd(5)) + { + case 0: + m = " You sank my %s!"; + break; + case 1: + m = " I have this sinking feeling about my %s...."; + break; + case 2: + m = " My %s has gone to Davy Jones's locker!"; + break; + case 3: + m = " Glub, glub -- my %s is headed for the bottom!"; + break; + case 4: + m = " You'll pick up survivors from my %s, I hope...!"; + break; + } + printw(m, ss->name); + beep(); + return(awinna() == -1); + } + return(hit); +} + +static int +sgetc(const char *s) +{ + const char *s1; + int ch; + + refresh(); + for(;;) { + ch = getch(); + if (islower(ch)) + ch = toupper(ch); + + if (ch == CTRLC) + uninitgame(); + + for (s1=s; *s1 && ch != *s1; ++s1) + continue; + + if (*s1) { + addch((chtype)ch); + refresh(); + return(ch); + } + } +} + +/* random-fire routine -- implements simple diagonal-striping strategy */ +static void +randomfire(int *px, int *py) +{ + static int turncount = 0; + static int srchstep = BEGINSTEP; + static int huntoffs; /* Offset on search strategy */ + int ypossible[BWIDTH * BDEPTH], xpossible[BWIDTH * BDEPTH], nposs; + int ypreferred[BWIDTH * BDEPTH], xpreferred[BWIDTH * BDEPTH], npref; + int x, y, i; + + if (turncount++ == 0) + huntoffs = rnd(srchstep); + + /* first, list all possible moves */ + nposs = npref = 0; + for (x = 0; x < BWIDTH; x++) + for (y = 0; y < BDEPTH; y++) + if (!hits[COMPUTER][x][y]) + { + xpossible[nposs] = x; + ypossible[nposs] = y; + nposs++; + if (((x+huntoffs) % srchstep) != (y % srchstep)) + { + xpreferred[npref] = x; + ypreferred[npref] = y; + npref++; + } + } + + if (npref) + { + i = rnd(npref); + + *px = xpreferred[i]; + *py = ypreferred[i]; + } + else if (nposs) + { + i = rnd(nposs); + + *px = xpossible[i]; + *py = ypossible[i]; + + if (srchstep > 1) + --srchstep; + } + else + { + error("No moves possible?? Help!"); + exit(1); + /*NOTREACHED*/ + } +} + +#define S_MISS 0 +#define S_HIT 1 +#define S_SUNK -1 + +/* fire away at given location */ +static bool +cpufire(int x, int y) +{ + bool hit, sunk; + ship_t *ss; + + ss = NULL; + hits[COMPUTER][x][y] = (hit = (board[PLAYER][x][y])) ? MARK_HIT : MARK_MISS; + mvprintw(PROMPTLINE, 0, + "I shoot at %c%d. I %s!", y + 'A', x, hit ? "hit" : "miss"); + ss = hitship(x, y); + sunk = hit && ss; + if (sunk) + printw(" I've sunk your %s", ss->name); + clrtoeol(); + + pgoto(y, x); +#ifdef A_COLOR + if (has_colors()) { + if (hit) + attron(COLOR_PAIR(COLOR_RED)); + else + attron(COLOR_PAIR(COLOR_GREEN)); + } +#endif /* A_COLOR */ + addch((chtype)(hit ? SHOWHIT : SHOWSPLASH)); +#ifdef A_COLOR + attrset(0); +#endif /* A_COLOR */ + + return(hit ? (sunk ? S_SUNK : S_HIT) : S_MISS); +} + +/* + * This code implements a fairly irregular FSM, so please forgive the rampant + * unstructuredness below. The five labels are states which need to be held + * between computer turns. + */ +static bool +cputurn(void) +{ +#define POSSIBLE(x, y) (ONBOARD(x, y) && !hits[COMPUTER][x][y]) +#define RANDOM_FIRE 0 +#define RANDOM_HIT 1 +#define HUNT_DIRECT 2 +#define FIRST_PASS 3 +#define REVERSE_JUMP 4 +#define SECOND_PASS 5 + static int next = RANDOM_FIRE; + static bool used[4]; + static ship_t ts; + int navail, x, y, d, n, hit = S_MISS; + + switch(next) + { + case RANDOM_FIRE: /* last shot was random and missed */ + refire: + randomfire(&x, &y); + if (!(hit = cpufire(x, y))) + next = RANDOM_FIRE; + else + { + ts.x = x; ts.y = y; + ts.hits = 1; + next = (hit == S_SUNK) ? RANDOM_FIRE : RANDOM_HIT; + } + break; + + case RANDOM_HIT: /* last shot was random and hit */ + used[E/2] = used[S/2] = used[W/2] = used[N/2] = FALSE; + /* FALLTHROUGH */ + + case HUNT_DIRECT: /* last shot hit, we're looking for ship's long axis */ + for (d = navail = 0; d < 4; d++) + { + x = ts.x + xincr[d*2]; y = ts.y + yincr[d*2]; + if (!used[d] && POSSIBLE(x, y)) + navail++; + else + used[d] = TRUE; + } + if (navail == 0) /* no valid places for shots adjacent... */ + goto refire; /* ...so we must random-fire */ + else + { + for (d = 0, n = rnd(navail) + 1; n; n--) + while (used[d]) + d++; + + assert(d <= 4); + + used[d] = FALSE; + x = ts.x + xincr[d*2]; + y = ts.y + yincr[d*2]; + + assert(POSSIBLE(x, y)); + + if (!(hit = cpufire(x, y))) + next = HUNT_DIRECT; + else + { + ts.x = x; ts.y = y; ts.dir = d*2; ts.hits++; + next = (hit == S_SUNK) ? RANDOM_FIRE : FIRST_PASS; + } + } + break; + + case FIRST_PASS: /* we have a start and a direction now */ + x = ts.x + xincr[ts.dir]; + y = ts.y + yincr[ts.dir]; + if (POSSIBLE(x, y) && (hit = cpufire(x, y))) + { + ts.x = x; ts.y = y; ts.hits++; + next = (hit == S_SUNK) ? RANDOM_FIRE : FIRST_PASS; + } + else + next = REVERSE_JUMP; + break; + + case REVERSE_JUMP: /* nail down the ship's other end */ + d = ts.dir + 4; + x = ts.x + ts.hits * xincr[d]; + y = ts.y + ts.hits * yincr[d]; + if (POSSIBLE(x, y) && (hit = cpufire(x, y))) + { + ts.x = x; ts.y = y; ts.dir = d; ts.hits++; + next = (hit == S_SUNK) ? RANDOM_FIRE : SECOND_PASS; + } + else + next = RANDOM_FIRE; + break; + + case SECOND_PASS: /* kill squares not caught on first pass */ + x = ts.x + xincr[ts.dir]; + y = ts.y + yincr[ts.dir]; + if (POSSIBLE(x, y) && (hit = cpufire(x, y))) + { + ts.x = x; ts.y = y; ts.hits++; + next = (hit == S_SUNK) ? RANDOM_FIRE: SECOND_PASS; + break; + } + else + next = RANDOM_FIRE; + break; + } + + /* check for continuation and/or winner */ + if (salvo) + { + refresh(); + sleep(1); + } + if (awinna() != -1) + return(FALSE); + +#ifdef DEBUG + mvprintw(PROMPTLINE + 2, 0, + "New state %d, x=%d, y=%d, d=%d", + next, x, y, d); +#endif /* DEBUG */ + return(hit); +} + +int +playagain(void) +{ + int j; + ship_t *ss; + + for (ss = cpuship; ss < cpuship + SHIPTYPES; ss++) { + for(j = 0; j < ss->length; j++) { + cgoto(ss->y + j * yincr[ss->dir], ss->x + j * xincr[ss->dir]); + addch((chtype)ss->symbol); + } + } + + if(awinna()) { + ++cpuwon; + } else { + ++plywon; + } + + j = 18 + strlen(name); + if(plywon >= 10) { + ++j; + } else if(cpuwon >= 10) { + ++j; + } + + mvprintw(1,(COLWIDTH-j)/2, + "%s: %d Computer: %d",name,plywon,cpuwon); + + prompt(2, (awinna()) ? "Want to be humiliated again, %s [yn]? " + : "Going to give me a chance for revenge, %s [yn]? ",name); + return(sgetc("YN") == 'Y'); +} + +static void +usage(void) +{ + fprintf(stderr, "Usage: battle [-s | -b] [-c]\n"); + fprintf(stderr, "\tWhere the options are:\n"); + fprintf(stderr, "\t-s : salvo - One shot per ship in play\n"); + fprintf(stderr, "\t-b : blitz - Fire until you miss\n"); + fprintf(stderr, "\t-c : closepack - Ships may be adjacent\n"); + fprintf(stderr, "Blitz and Salvo are mutually exclusive\n"); + exit(1); +} + +static int +scount(int who) +{ + int i, shots; + ship_t *sp; + + if (who) + sp = cpuship; /* count cpu shots */ + else + sp = plyship; /* count player shots */ + + for (i=0, shots = 0; i < SHIPTYPES; i++, sp++) + { + if (sp->hits >= sp->length) + continue; /* dead ship */ + else + shots++; + } + return(shots); +} + +int +main(int argc, char **argv) +{ + int ch; + + /* revoke */ + setgid(getgid()); + + while ((ch = getopt(argc, argv, "bsc")) != -1) { + switch (ch) { + case 'b': + blitz = 1; + break; + case 's': + salvo = 1; + break; + case 'c': + closepack = 1; + break; + case '?': + default: + usage(); + } + } + argc -= optind; + argv += optind; + + if (blitz && salvo) + usage(); + + intro(); + + do { + initgame(); + while(awinna() == -1) { + if (blitz) { + while(turn ? cputurn() : plyturn()) + continue; + } else if (salvo) { + int i; + + i = scount(turn); + while (i--) { + if (turn) { + if (cputurn() && awinna() != -1) + i = 0; + } else { + if (plyturn() && awinna() != -1) + i = 0; + } + } + } else { /* Normal game */ + if(turn) + cputurn(); + else + plyturn(); + } + turn = OTHER; + } + } while (playagain()); + + uninitgame(); + exit(0); +} |