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/* $OpenBSD: back.h,v 1.12 2013/08/29 20:22:10 naddy Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)back.h 8.1 (Berkeley) 5/31/93
*/
#include <sys/types.h>
#include <sys/uio.h>
#include <curses.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <term.h>
#include <unistd.h>
#define rnum(r) arc4random_uniform(r)
#define D0 dice[0]
#define D1 dice[1]
#define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
#define CIN_SIZE 40
#ifdef DEBUG
extern FILE *ftrace;
#endif
/*
*
* Some numerical conventions:
*
* Arrays have white's value in [0], red in [1].
* Numeric values which are one color or the other use
* -1 for white, 1 for red.
* Hence, white will be negative values, red positive one.
* This makes a lot of sense since white is going in decending
* order around the board, and red is ascending.
*
*/
extern const char EXEC[]; /* object for main program */
extern const char TEACH[]; /* object for tutorial program */
extern int pnum; /* color of player:
-1 = white
1 = red
0 = both
2 = not yet init'ed */
extern char args[100]; /* args passed to teachgammon and back */
extern int acnt; /* length of args */
extern int aflag; /* flag to ask for rules or instructions */
extern int cflag; /* case conversion flag */
extern int hflag; /* flag for cleaning screen */
extern int mflag; /* backgammon flag */
extern int raflag; /* 'roll again' flag for recovered game */
extern int rflag; /* recovered game flag */
extern int dflag; /* disable doubling flag */
extern int rfl; /* saved value of rflag */
extern int iroll; /* special flag for inputting rolls */
extern int board[26]; /* board: negative values are white,
positive are red */
extern int dice[2]; /* value of dice */
extern int mvlim; /* 'move limit': max. number of moves */
extern int mvl; /* working copy of mvlim */
extern int p[5]; /* starting position of moves */
extern int g[5]; /* ending position of moves (goals) */
extern int h[4]; /* flag for each move if a man was hit */
extern int cturn; /* whose turn it currently is:
-1 = white
1 = red
0 = just quit
-2 = white just lost
2 = red just lost */
extern int d0; /* flag if dice have been reversed from
original position */
extern int table[6][6]; /* odds table for possible rolls */
extern int rscore; /* red's score */
extern int wscore; /* white's score */
extern int gvalue; /* value of game (64 max.) */
extern int dlast; /* who doubled last (0 = neither) */
extern int bar; /* position of bar for current player */
extern int home; /* position of home for current player */
extern int off[2]; /* number of men off board */
extern int *offptr; /* pointer to off for current player */
extern int *offopp; /* pointer to off for opponent */
extern int in[2]; /* number of men in inner table */
extern int *inptr; /* pointer to in for current player */
extern int *inopp; /* pointer to in for opponent */
extern int ncin; /* number of characters in cin */
extern char cin[CIN_SIZE]; /* input line of current move
(used for reconstructing input after
a backspace) */
extern const char *const color[]; /* colors as strings */
extern const char *const *colorptr; /* color of current player */
extern const char *const *Colorptr; /* color of current player,
* capitalized */
extern int colen; /* length of color of current player */
extern int begscr; /* 'beginning' of screen
(not including board) */
int addbuf(int);
void backone(int);
void bsect(int, int, int, int);
int canhit(int, int);
int checkd(int);
int checkmove(int);
int count(void);
int dotable(char, int);
void errexit(const char *);
void fboard(void);
void fixcol(int, int, int, int, int);
void fixpos(int, int, int, int, int);
void getarg(int, char **);
void getmove(void);
void getout(int); /* function to exit backgammon cleanly */
void gwrite(void);
void init(void);
void initcurses(void);
int last(void);
int makmove(int);
int movallow(void);
void movback(int);
void moveplayers(void);
void moverr(int);
int movokay(int);
void nexturn(void);
void norec(const char *);
void odds(int, int, int);
void proll(void);
int quit(void);
int readc(void);
void recover(const char *);
void roll(void);
int rsetbrd(void);
void save(int);
int text(const char *const *);
void wrboard(void);
void wrbsub(void);
void wrhit(int);
void wrscore(void);
int yorn(char);
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