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- /****************************************************************************
- * Copyright 2018-2019,2020 Thomas E. Dickey *
- * Copyright 1998-2016,2017 Free Software Foundation, Inc. *
- * *
- * Permission is hereby granted, free of charge, to any person obtaining a *
- * copy of this software and associated documentation files (the *
- * "Software"), to deal in the Software without restriction, including *
- * without limitation the rights to use, copy, modify, merge, publish, *
- * distribute, distribute with modifications, sublicense, and/or sell *
- * copies of the Software, and to permit persons to whom the Software is *
- * furnished to do so, subject to the following conditions: *
- * *
- * The above copyright notice and this permission notice shall be included *
- * in all copies or substantial portions of the Software. *
- * *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
- * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
- * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
- * *
- * Except as contained in this notice, the name(s) of the above copyright *
- * holders shall not be used in advertising or otherwise to promote the *
- * sale, use or other dealings in this Software without prior written *
- * authorization. *
- ****************************************************************************/
- /*
- * 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.
- * v2.1 with ncurses mouse support, September 1995
- *
- * $Id: bs.c,v 1.75 2020/02/02 23:34:34 tom Exp $
- */
- #include <test.priv.h>
- #include <time.h>
- #ifndef SIGIOT
- #define SIGIOT SIGABRT
- #endif
- static int getcoord(int);
- /*
- * 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 */
- #define is_QUIT(c) ((c) == CTRLC || (c) == QUIT)
- /* coordinate handling */
- #define BWIDTH 10
- #define BDEPTH 10
- /* display symbols */
- #define SHOWHIT '*'
- #define SHOWSPLASH ' '
- #define IS_SHIP(c) (isupper(UChar(c)) ? TRUE : FALSE)
- /* 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) (void)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 CYINV(y) ((y) - CYBASE)
- #define CXINV(x) (((x) - CXBASE) / 3)
- #define cgoto(y, x) (void)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 *your_name;
- static char dftname[] = "stranger";
- /* direction constants */
- typedef enum {
- dir_E = 0
- ,dir_SE
- ,dir_S
- ,dir_SW
- ,dir_W
- ,dir_NW
- ,dir_N
- ,dir_NE
- ,dir_MAX
- } DIRECTIONS;
- static int xincr[dir_MAX + 2] =
- {1, 1, 0, -1, -1, -1, 0, 1};
- static int yincr[dir_MAX + 2] =
- {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 */
- int hits; /* how many times has this ship been hit? */
- char symbol; /* symbol for game purposes */
- int length; /* length of ship */
- int x, y; /* coordinates of ship start point */
- int dir; /* direction of `bow' */
- bool placed; /* has it been placed on the board? */
- } ship_t;
- static bool checkplace(int b, ship_t * ss, int vis);
- #define SHIPIT(name, symbol, length) { name, 0, symbol, length, 0,0, 0, FALSE }
- /* "ply=player", "cpu=computer" */
- static ship_t plyship[SHIPTYPES] =
- {
- SHIPIT(carrier, 'A', 5),
- SHIPIT(battle, 'B', 4),
- SHIPIT(destroy, 'D', 3),
- SHIPIT(sub, 'S', 3),
- SHIPIT(ptboat, 'P', 2),
- };
- static ship_t cpuship[SHIPTYPES] =
- {
- SHIPIT(carrier, 'A', 5),
- SHIPIT(battle, 'B', 4),
- SHIPIT(destroy, 'D', 3),
- SHIPIT(sub, 'S', 3),
- SHIPIT(ptboat, 'P', 2),
- };
- /* "Hits" board, and main board. */
- static char hits[2][BWIDTH][BDEPTH];
- static char 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 (void)addstr
- static void uninitgame(int sig) GCC_NORETURN;
- static void
- uninitgame(int sig GCC_UNUSED)
- /* end the game, either normally or due to signal */
- {
- clear();
- (void) refresh();
- (void) reset_shell_mode();
- (void) echo();
- (void) endwin();
- free(your_name);
- ExitProgram(sig ? EXIT_FAILURE : EXIT_SUCCESS);
- }
- static void
- announceopts(void)
- /* announce which game options are enabled */
- {
- if (salvo || blitz || closepack) {
- (void) printw("Playing optional game (");
- if (salvo)
- (void) printw("salvo, ");
- else
- (void) printw("nosalvo, ");
- if (blitz)
- (void) printw("blitz ");
- else
- (void) printw("noblitz, ");
- if (closepack)
- (void) printw("closepack)");
- else
- (void) printw("noclosepack)");
- } else
- (void) printw(
- "Playing standard game (noblitz, nosalvo, noclosepack)");
- }
- static void
- intro(void)
- {
- const char *tmpname;
- srand((unsigned) (time(0L) + getpid())); /* Kick the random number generator */
- InitAndCatch(initscr(), uninitgame);
- if ((tmpname = getlogin()) != 0 &&
- (your_name = strdup(tmpname)) != 0) {
- your_name[0] = (char) toupper(UChar(your_name[0]));
- } else {
- your_name = strdup(dftname);
- }
- keypad(stdscr, TRUE);
- (void) def_prog_mode();
- (void) nonl();
- (void) cbreak();
- (void) noecho();
- #ifdef PENGUIN
- (void) clear();
- MvAddStr(4, 29, "Welcome to Battleship!");
- (void) 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...");
- (void) refresh();
- (void) 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 */
- #ifdef NCURSES_MOUSE_VERSION
- (void) mousemask(BUTTON1_CLICKED, (mmask_t *) NULL);
- #endif /* NCURSES_MOUSE_VERSION */
- }
- /* VARARGS1 */
- static void
- prompt(int n, NCURSES_CONST char *f, const char *s)
- /* print a message at the prompt line */
- {
- (void) move(PROMPTLINE + n, 0);
- (void) clrtoeol();
- (void) printw(f, s);
- (void) refresh();
- }
- static void
- error(NCURSES_CONST char *s)
- {
- (void) move(PROMPTLINE + 2, 0);
- (void) clrtoeol();
- if (s) {
- (void) addstr(s);
- (void) 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(ss->symbol);
- }
- }
- ss->hits = 0;
- }
- static int
- rnd(int n)
- {
- return (((rand() & 0x7FFF) % n));
- }
- static void
- randomplace(int b, ship_t * ss)
- /* generate a valid random ship placement into px,py */
- {
- do {
- ss->dir = rnd(2) ? dir_E : dir_S;
- ss->x = rnd(BWIDTH - (ss->dir == dir_E ? ss->length : 0));
- ss->y = rnd(BDEPTH - (ss->dir == dir_S ? ss->length : 0));
- } while
- (!checkplace(b, ss, FALSE));
- }
- static void
- initgame(void)
- {
- int i, j, unplaced;
- ship_t *ss;
- (void) clear();
- MvAddStr(0, 35, "BATTLESHIPS");
- (void) move(PROMPTLINE + 2, 0);
- announceopts();
- memset(board, 0, sizeof(char) * BWIDTH * BDEPTH * 2);
- memset(hits, 0, sizeof(char) * BWIDTH * BDEPTH * 2);
- for (i = 0; i < SHIPTYPES; i++) {
- ss = cpuship + i;
- ss->x =
- ss->y =
- ss->dir =
- ss->hits = 0;
- ss->placed = FALSE;
- ss = plyship + i;
- ss->x =
- ss->y =
- ss->dir =
- ss->hits = 0;
- ss->placed = FALSE;
- }
- /* 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, (chtype) (i + 'A'));
- #ifdef A_COLOR
- if (has_colors())
- attron(COLOR_PAIR(COLOR_BLUE));
- #endif /* A_COLOR */
- AddCh(' ');
- for (j = 0; j < BWIDTH; j++)
- (void) addstr(" . ");
- #ifdef A_COLOR
- (void) 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, (chtype) (i + 'A'));
- #ifdef A_COLOR
- if (has_colors())
- attron(COLOR_PAIR(COLOR_BLUE));
- #endif /* A_COLOR */
- AddCh(' ');
- for (j = 0; j < BWIDTH; j++)
- (void) addstr(" . ");
- #ifdef A_COLOR
- (void) 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);
- }
- do {
- char c, docked[SHIPTYPES + 2], *cp = docked;
- ss = (ship_t *) NULL;
- /* 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 = (char) getcoord(PLAYER);
- } while
- (!(strchr) (docked, c));
- if (c == 'R')
- (void) 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 = (char) getch();
- } while
- (!(strchr("hjkl8462rR", c) || c == FF || is_QUIT(c)));
- if (is_QUIT(c)) {
- uninitgame(0);
- } else if (c == FF) {
- (void) clearok(stdscr, TRUE);
- (void) refresh();
- } else if (ss == 0) {
- beep(); /* simple to verify, unlikely to happen */
- } else if (c == 'r') {
- prompt(1, "Random-placing your %s", ss->name);
- randomplace(PLAYER, ss);
- placeship(PLAYER, ss, TRUE);
- error((char *) 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((char *) NULL);
- } else if (strchr("hjkl8462", c)) {
- ss->x = curx;
- ss->y = cury;
- switch (c) {
- case 'k':
- case '8':
- ss->dir = dir_N;
- break;
- case 'j':
- case '2':
- ss->dir = dir_S;
- break;
- case 'h':
- case '4':
- ss->dir = dir_W;
- break;
- case 'l':
- case '6':
- ss->dir = dir_E;
- break;
- }
- if (checkplace(PLAYER, ss, TRUE)) {
- placeship(PLAYER, ss, TRUE);
- error((char *) 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,
- " ");
- (void) prompt(0, "Press any key to start...", "");
- (void) getch();
- }
- static int
- getcoord(int atcpu)
- {
- if (atcpu)
- cgoto(cury, curx);
- else
- pgoto(cury, curx);
- (void) refresh();
- for (;;) {
- int ny, nx, c;
- 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':
- case KEY_UP:
- ny = cury + BDEPTH - 1;
- nx = curx;
- break;
- case 'j':
- case '2':
- case KEY_DOWN:
- ny = cury + 1;
- nx = curx;
- break;
- case 'h':
- case '4':
- case KEY_LEFT:
- ny = cury;
- nx = curx + BWIDTH - 1;
- break;
- case 'l':
- case '6':
- case KEY_RIGHT:
- ny = cury;
- nx = curx + 1;
- break;
- case 'y':
- case '7':
- case KEY_A1:
- ny = cury + BDEPTH - 1;
- nx = curx + BWIDTH - 1;
- break;
- case 'b':
- case '1':
- case KEY_C1:
- ny = cury + 1;
- nx = curx + BWIDTH - 1;
- break;
- case 'u':
- case '9':
- case KEY_A3:
- ny = cury + BDEPTH - 1;
- nx = curx + 1;
- break;
- case 'n':
- case '3':
- case KEY_C3:
- ny = cury + 1;
- nx = curx + 1;
- break;
- case FF:
- nx = curx;
- ny = cury;
- (void) clearok(stdscr, TRUE);
- (void) refresh();
- break;
- #ifdef NCURSES_MOUSE_VERSION
- case KEY_MOUSE:
- {
- MEVENT myevent;
- getmouse(&myevent);
- if (atcpu
- && myevent.y >= CY(0) && myevent.y <= CY(BDEPTH)
- && myevent.x >= CX(0) && myevent.x <= CX(BDEPTH)) {
- curx = CXINV(myevent.x);
- cury = CYINV(myevent.y);
- return (' ');
- } else {
- beep();
- continue;
- }
- }
- /* no fall through */
- #endif /* NCURSES_MOUSE_VERSION */
- default:
- if (atcpu)
- MvAddStr(CYBASE + BDEPTH + 1, CXBASE + 11, " ");
- else
- MvAddStr(PYBASE + BDEPTH + 1, PXBASE + 11, " ");
- return (c);
- }
- curx = nx % BWIDTH;
- cury = ny % BDEPTH;
- }
- }
- static bool
- collidecheck(int b, int y, int x)
- /* is this location on the selected zboard adjacent to a ship? */
- {
- bool collide;
- /* anything on the square */
- if ((collide = IS_SHIP(board[b][x][y])) != FALSE)
- return (collide);
- /* anything on the neighbors */
- if (!closepack) {
- int i;
- for (i = 0; i < dir_MAX; i++) {
- int xend, yend;
- yend = y + yincr[i];
- xend = x + xincr[i];
- if (ONBOARD(xend, yend)
- && IS_SHIP(board[b][xend][yend])) {
- collide = TRUE;
- break;
- }
- }
- }
- 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 (FALSE);
- }
- 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;
- for (i = 0; i < 2; ++i) {
- ship_t *ss = (i) ? cpuship : plyship;
- for (j = 0; j < SHIPTYPES; ++j, ++ss)
- if (ss->length > ss->hits)
- break;
- if (j == SHIPTYPES)
- return (OTHER);
- }
- return (-1);
- }
- static ship_t *
- hitship(int x, int y)
- /* register a hit on the targeted ship */
- {
- ship_t *sb, *ss;
- char sym;
- int oldx, oldy;
- getyx(stdscr, oldy, oldx);
- sb = (turn) ? plyship : cpuship;
- if ((sym = board[OTHER][x][y]) == 0)
- return ((ship_t *) NULL);
- for (ss = sb; ss < sb + SHIPTYPES; ++ss)
- if (ss->symbol == sym) {
- if (++ss->hits < ss->length) /* still afloat? */
- return ((ship_t *) NULL);
- else { /* sunk! */
- int i;
- if (!closepack) {
- int j;
- for (j = -1; j <= 1; j++) {
- int bx = ss->x + j * xincr[(ss->dir + 2) % dir_MAX];
- int by = ss->y + j * yincr[(ss->dir + 2) % dir_MAX];
- for (i = -1; i <= ss->length; ++i) {
- int x1, y1;
- x1 = bx + i * xincr[ss->dir];
- y1 = by + i * yincr[ss->dir];
- if (ONBOARD(x1, y1)) {
- hits[turn][x1][y1] = MARK_MISS;
- if (turn % 2 == PLAYER) {
- cgoto(y1, x1);
- #ifdef A_COLOR
- if (has_colors())
- attron(COLOR_PAIR(COLOR_GREEN));
- #endif /* A_COLOR */
- AddCh(MARK_MISS);
- #ifdef A_COLOR
- (void) attrset(0);
- #endif /* A_COLOR */
- } else {
- pgoto(y1, x1);
- AddCh(SHOWSPLASH);
- }
- }
- }
- }
- }
- for (i = 0; i < ss->length; ++i) {
- int x1 = ss->x + i * xincr[ss->dir];
- int y1 = ss->y + i * yincr[ss->dir];
- hits[turn][x1][y1] = ss->symbol;
- if (turn % 2 == PLAYER) {
- cgoto(y1, x1);
- AddCh(ss->symbol);
- } else {
- pgoto(y1, x1);
- #ifdef A_COLOR
- if (has_colors())
- attron(COLOR_PAIR(COLOR_RED));
- #endif /* A_COLOR */
- AddCh(SHOWHIT);
- #ifdef A_COLOR
- (void) attrset(0);
- #endif /* A_COLOR */
- }
- }
- (void) move(oldy, oldx);
- return (ss);
- }
- }
- (void) move(oldy, oldx);
- return ((ship_t *) NULL);
- }
- static bool
- plyturn(void)
- {
- ship_t *ss;
- bool hit;
- NCURSES_CONST char *m = NULL;
- prompt(1, "Where do you want to shoot? ", "");
- for (;;) {
- (void) 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] = (char) (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(hits[PLAYER][curx][cury]);
- #ifdef A_COLOR
- (void) 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;
- }
- if (m != 0) {
- (void) printw(m, ss->name);
- }
- (void) beep();
- }
- return (hit);
- }
- static int
- sgetc(const char *s)
- {
- (void) refresh();
- for (;;) {
- int ch = getch();
- const char *s1;
- if (islower(ch))
- ch = toupper(ch);
- if (is_QUIT(ch))
- uninitgame(0);
- for (s1 = s; *s1 && ch != *s1; ++s1)
- continue;
- if (*s1) {
- AddCh(ch);
- (void) refresh();
- return (ch);
- }
- }
- }
- static void
- randomfire(int *px, int *py)
- /* random-fire routine -- implements simple diagonal-striping strategy */
- {
- 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!");
- ExitProgram(EXIT_FAILURE);
- /*NOTREACHED */
- }
- }
- #define S_MISS 0
- #define S_HIT 1
- #define S_SUNK -1
- static int
- cpufire(int x, int y)
- /* fire away at given location */
- {
- bool hit, sunk;
- ship_t *ss = NULL;
- hit = (bool) board[PLAYER][x][y];
- hits[COMPUTER][x][y] = (hit ? MARK_HIT : MARK_MISS);
- MvPrintw(PROMPTLINE, 0,
- "I shoot at %c%d. I %s!", y + 'A', x, hit ? "hit" :
- "miss");
- if ((sunk = (hit && (ss = hitship(x, y)))) != 0)
- (void) printw(" I've sunk your %s", ss->name);
- (void) 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((hit ? SHOWHIT : SHOWSPLASH));
- #ifdef A_COLOR
- (void) 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.
- *
- * The FSM is not externally reset to RANDOM_FIRE if the player wins. Instead,
- * the other states check for "impossible" conditions which signify a new
- * game, then if found transition to RANDOM_FIRE.
- */
- 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[5];
- static ship_t ts;
- int navail, x, y, d, n;
- int 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[dir_E / 2] =
- used[dir_S / 2] =
- used[dir_W / 2] =
- used[dir_N / 2] = FALSE;
- /* FALLTHROUGH */
- case HUNT_DIRECT: /* last shot hit, we're looking for ship's long axis */
- for (d = navail = 0; d < (dir_MAX) / 2; 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 {
- n = rnd(navail) + 1;
- for (d = 0; d < (dir_MAX) / 2 && used[d]; d++) ;
- /* used[d] is first that == 0 */
- for (; n > 1; n--)
- while (d < (dir_MAX) / 2 && used[++d]) ;
- /* used[d] is next that == 0 */
- assert(d < (dir_MAX) / 2);
- assert(used[d] == FALSE);
- used[d] = TRUE;
- 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 + (dir_MAX) / 2) % dir_MAX;
- 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: /* continue shooting after reversing */
- 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;
- }
- /* pause between shots in salvo */
- if (salvo) {
- (void) refresh();
- (void) sleep(1);
- }
- #ifdef DEBUG
- MvPrintw(PROMPTLINE + 2, 0,
- "New state %d, x=%d, y=%d, d=%d",
- next, x, y, d);
- #endif /* DEBUG */
- return ((hit) ? TRUE : FALSE);
- }
- static 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(ss->symbol);
- }
- if (awinna())
- ++cpuwon;
- else
- ++plywon;
- j = 18 + (int) strlen(your_name);
- if (plywon >= 10)
- ++j;
- if (cpuwon >= 10)
- ++j;
- MvPrintw(1, (COLWIDTH - j) / 2,
- "%s: %d Computer: %d", your_name, plywon, cpuwon);
- prompt(2, (awinna())? "Want to be humiliated again, %s [yn]? "
- : "Going to give me a chance for revenge, %s [yn]? ", your_name);
- return (sgetc("YN") == 'Y');
- }
- static void
- do_options(int c, char *op[])
- {
- if (c > 1) {
- int i;
- for (i = 1; i < c; i++) {
- switch (op[i][0]) {
- default:
- case '?':
- (void) fprintf(stderr, "Usage: bs [-s | -b] [-c]\n");
- (void) fprintf(stderr, "\tWhere the options are:\n");
- (void) fprintf(stderr, "\t-s : play a salvo game\n");
- (void) fprintf(stderr, "\t-b : play a blitz game\n");
- (void) fprintf(stderr, "\t-c : ships may be adjacent\n");
- ExitProgram(EXIT_FAILURE);
- break;
- case '-':
- switch (op[i][1]) {
- case 'b':
- blitz = 1;
- if (salvo == 1) {
- (void) fprintf(stderr,
- "Bad Arg: -b and -s are mutually exclusive\n");
- ExitProgram(EXIT_FAILURE);
- }
- break;
- case 's':
- salvo = 1;
- if (blitz == 1) {
- (void) fprintf(stderr,
- "Bad Arg: -s and -b are mutually exclusive\n");
- ExitProgram(EXIT_FAILURE);
- }
- break;
- case 'c':
- closepack = 1;
- break;
- default:
- (void) fprintf(stderr,
- "Bad arg: type \"%s ?\" for usage message\n",
- op[0]);
- ExitProgram(EXIT_FAILURE);
- }
- }
- }
- }
- }
- static int
- scount(int who)
- {
- register int i, shots;
- register 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[])
- {
- setlocale(LC_ALL, "");
- do_options(argc, argv);
- intro();
- do {
- initgame();
- while (awinna() == -1) {
- if (!blitz) {
- if (!salvo) {
- if (turn)
- (void) cputurn();
- else
- (void) plyturn();
- } else {
- register int i;
- i = scount(turn);
- while (i--) {
- if (turn) {
- if (cputurn() && awinna() != -1)
- i = 0;
- } else {
- if (plyturn() && awinna() != -1)
- i = 0;
- }
- }
- }
- } else
- while ((turn ? cputurn() : plyturn()) && awinna() == -1)
- continue;
- turn = OTHER;
- }
- } while
- (playagain());
- uninitgame(0);
- /*NOTREACHED */
- }
- /* bs.c ends here */
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