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save.c revision 1.1 
      1 /*
      2  * Copyright (c) 1980 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)save.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 #include "back.h"
     39 
     40 extern int	errno;
     41 
     42 static char	confirm[] = "Are you sure you want to leave now?";
     43 static char	prompt[] = "Enter a file name:  ";
     44 static char	exist1[] = "The file '";
     45 static char	exist2[] =
     46 	"' already exists.\nAre you sure you want to use this file?";
     47 static char	cantuse[] = "\nCan't use ";
     48 static char	saved[] = "This game has been saved on the file '";
     49 static char	type[] = "'.\nType \"backgammon ";
     50 static char	rec[] = "\" to recover your game.\n\n";
     51 static char	cantrec[] = "Can't recover file:  ";
     52 
     53 save (n)
     54 register int	n;
     55 
     56 {
     57 	register int	fdesc;
     58 	register char	*fs;
     59 	char		fname[50];
     60 
     61 	if (n)  {
     62 		if (tflag)  {
     63 			curmove (20,0);
     64 			clend();
     65 		} else
     66 			writec ('\n');
     67 		writel (confirm);
     68 		if (! yorn(0))
     69 			return;
     70 	}
     71 	cflag = 1;
     72 	for (;;)  {
     73 		writel (prompt);
     74 		fs = fname;
     75 		while ((*fs = readc()) != '\n')  {
     76 			if (*fs == tty.sg_erase)  {
     77 				if (fs > fname)  {
     78 					fs--;
     79 					if (tflag)
     80 						curmove (curr,curc-1);
     81 					else
     82 						writec (*fs);
     83 				} else
     84 					writec ('\007');
     85 				continue;
     86 			}
     87 			writec (*fs++);
     88 		}
     89 		*fs = '\0';
     90 		if ((fdesc = open(fname,2)) == -1 && errno == 2)  {
     91 			if ((fdesc = creat (fname,0700)) != -1)
     92 			break;
     93 		}
     94 		if (fdesc != -1)  {
     95 			if (tflag)  {
     96 				curmove (18,0);
     97 				clend();
     98 			} else
     99 				writec ('\n');
    100 			writel (exist1);
    101 			writel (fname);
    102 			writel (exist2);
    103 			cflag = 0;
    104 			close (fdesc);
    105 			if (yorn (0))  {
    106 				unlink (fname);
    107 				fdesc = creat (fname,0700);
    108 				break;
    109 			} else  {
    110 				cflag = 1;
    111 				continue;
    112 			}
    113 		}
    114 		writel (cantuse);
    115 		writel (fname);
    116 		writel (".\n");
    117 		close (fdesc);
    118 		cflag = 1;
    119 	}
    120 	write (fdesc,board,sizeof board);
    121 	write (fdesc,off,sizeof off);
    122 	write (fdesc,in,sizeof in);
    123 	write (fdesc,dice,sizeof dice);
    124 	write (fdesc,&cturn,sizeof cturn);
    125 	write (fdesc,&dlast,sizeof dlast);
    126 	write (fdesc,&pnum,sizeof pnum);
    127 	write (fdesc,&rscore,sizeof rscore);
    128 	write (fdesc,&wscore,sizeof wscore);
    129 	write (fdesc,&gvalue,sizeof gvalue);
    130 	write (fdesc,&raflag,sizeof raflag);
    131 	close (fdesc);
    132 	if (tflag)
    133 		curmove (18,0);
    134 	writel (saved);
    135 	writel (fname);
    136 	writel (type);
    137 	writel (fname);
    138 	writel (rec);
    139 	if (tflag)
    140 		clend();
    141 	getout ();
    142 }
    143 
    144 recover (s)
    146 char	*s;
    147 
    148 {
    149 	register int	i;
    150 	int		fdesc;
    151 
    152 	if ((fdesc = open (s,0)) == -1)
    153 		norec (s);
    154 	read (fdesc,board,sizeof board);
    155 	read (fdesc,off,sizeof off);
    156 	read (fdesc,in,sizeof in);
    157 	read (fdesc,dice,sizeof dice);
    158 	read (fdesc,&cturn,sizeof cturn);
    159 	read (fdesc,&dlast,sizeof dlast);
    160 	read (fdesc,&pnum,sizeof pnum);
    161 	read (fdesc,&rscore,sizeof rscore);
    162 	read (fdesc,&wscore,sizeof wscore);
    163 	read (fdesc,&gvalue,sizeof gvalue);
    164 	read (fdesc,&raflag,sizeof raflag);
    165 	close (fdesc);
    166 	rflag = 1;
    167 }
    168 
    169 norec (s)
    170 register char	*s;
    171 
    172 {
    173 	register char	*c;
    174 
    175 	tflag = 0;
    176 	writel (cantrec);
    177 	c = s;
    178 	while (*c != '\0')
    179 		writec (*c++);
    180 	getout ();
    181 }
    182