view arogue7/save.c @ 246:61283e71037c

Rogue V5: don't limit the high score list to 1 on Windows. The Visual Studio project file failed to define ALLSCORES, causing the score file to be limited to one entry per UID. Since the UID is always set to 42 on Windows, only one entry could ever appear in the list.
author John "Elwin" Edwards
date Sun, 15 May 2016 19:04:46 -0400
parents f9ef86cf22b2
children 3d4252fa2ed3
line wrap: on
line source

/*
 * save.c - save and restore routines
 *
 * Advanced Rogue
 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
 * All rights reserved.
 *
 * Based on "Rogue: Exploring the Dungeons of Doom"
 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

/*
 * save and restore routines
 *
 */

#include "curses.h"
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include "rogue.h"
#include <fcntl.h>
#include <errno.h>
#include "mach_dep.h"
#ifdef PC7300
#include "sys/window.h"
extern struct uwdata wdata;
#endif

#if u370 || uts
#define ENCREAD(b,n,fd) read(fd,b,n)
#define ENCWRITE(b,n,fd) write(fd,b,n)
#endif
#ifndef ENCREAD
#define ENCREAD encread
#define ENCWRITE encwrite
#endif

bool save_file(int savefd);

typedef struct stat STAT;

extern char version[], encstr[];
/* extern bool _endwin; */
extern int errno;

STAT sbuf;

bool
save_game(void)
{
    register int savefd;
    register int c;
    char buf[LINELEN];

    /*
     * get file name
     */
    mpos = 0;
    if (file_name[0] != '\0')
    {
        if (use_savedir)
	    msg("Save game? ");
        else
	    msg("Save file (%s)? ", file_name);
	do
	{
	    c = readchar();
	    if (c == ESCAPE) return(0);
	} while (c != 'n' && c != 'N' && c != 'y' && c != 'Y');
	mpos = 0;
	if (c == 'y' || c == 'Y')
	{
	    msg("File name: %s", file_name);
	    goto gotfile;
	}
    }

    if (use_savedir)
    {
	msg("");
	return FALSE;
    }

    do
    {
	msg("File name: ");
	mpos = 0;
	buf[0] = '\0';
	if (get_str(buf, msgw) == QUIT)
	{
	    msg("");
	    return FALSE;
	}
	strcpy(file_name, buf);
gotfile:
	if ((savefd = open(file_name, O_WRONLY|O_CREAT|O_TRUNC,0666)) < 0)
        {
	    msg(strerror(errno));	/* fake perror() */
            if (use_savedir)
                return FALSE;
        }
    } while (savefd < 0);

    /*
     * write out encrpyted file (after a stat)
     */
    if (save_file(savefd) == FALSE) {
	msg("Cannot create save file.");
	md_unlink(file_name);
	return(FALSE);
    }
    else return(TRUE);
}

/*
 * automatically save a file.  This is used if a HUP signal is
 * recieved
 */
void
auto_save(int sig)
{
    register int savefd;
    register int i;

    for (i = 0; i < NSIG; i++)
	signal(i, SIG_IGN);
    if (file_name[0] != '\0'	&& 
	pstats.s_hpt > 0	&&
	(savefd = open(file_name, O_WRONLY|O_CREAT|O_TRUNC, 0600)) >= 0)
	save_file(savefd);
    endwin();
#ifdef PC7300
    endhardwin();
#endif
    exit(1);
}

/*
 * write the saved game on the file
 */
bool
save_file(int savefd)
{
    register unsigned num_to_write, num_written;
    FILE *savef;
    int ret;

    wmove(cw, lines-1, 0);
    draw(cw);
    lseek(savefd, 0L, 0);
    fstat(savefd, &sbuf);
    num_to_write = strlen(version) + 1;
    num_written = ENCWRITE(version, num_to_write, savefd);
    sprintf(prbuf,"%d x %d\n", LINES, COLS);
    ENCWRITE(prbuf,80,savefd);
    savef = (FILE *) md_fdopen(savefd,"wb");
    ret = rs_save_file(savef);
    fclose(savef);
    if (num_to_write == num_written && ret == 0) return(TRUE);
    else return(FALSE);
}

bool
restore(char *file, char *envp[])
{
    register int inf;
    extern char **environ;
    char buf[LINELEN];
    STAT sbuf2;
    int oldcol, oldline;	/* Old number of columns and lines */

    if (strcmp(file, "-r") == 0)
	file = file_name;
    if ((inf = open(file, 0)) < 0)
    {
        if (use_savedir && errno == ENOENT)
        {
            return TRUE;
        }
	perror(file);
	return FALSE;
    }

    fflush(stdout);
    ENCREAD(buf, strlen(version) + 1, inf);
    if (strcmp(buf, version) != 0)
    {
	printf("Sorry, saved game is out of date.\n");
	return FALSE;
    }
    
    /*
     * Get the lines and columns from the previous game
     */

    ENCREAD(buf, 80, inf);
    sscanf(buf, "%d x %d\n", &oldline, &oldcol);
    fstat(inf, &sbuf2);
    fflush(stdout);

    initscr();
 
    if (COLS < oldcol || LINES < oldline) {
	endwin();
	printf("Cannot restart the game on a smaller screen.\n");
	return FALSE;
    }

    setup();
    /*
     * Set up windows
     */
    cw = newwin(lines, cols, 0, 0);
    mw = newwin(lines, cols, 0, 0);
    hw = newwin(lines, cols, 0, 0);
    msgw = newwin(4, cols, 0, 0);

    keypad(cw,1);
    keypad(msgw,1);

    if (rs_restore_file(inf) != 0)
    {
	printf("Cannot restore file\n");
	close(inf);
	return(FALSE);
    }

    cols = COLS;
    lines = LINES;
    if (cols > 85) cols = 85;
    if (lines > 24) lines = 24;

    mpos = 0;
    msg("");
    /*msg("%s: %s", file, ctime(&sbuf2.st_mtime));*/

    /*
     * defeat multiple restarting from the same place
     */
    if (!wizard && md_unlink_open_file(file, inf) < 0) {
	printf("Cannot unlink file\n");
	return FALSE;
    }

    environ = envp;
    strcpy(file_name, file);
    setup();
    clearok(curscr, TRUE);
    touchwin(cw);
    srand(getpid());
    playit();
    /*NOTREACHED*/
    return(0);
}

#define ENCWBSIZ	1024
/*
 * perform an encrypted write
 */
int
encwrite(char *start, unsigned int size, int outf)
{
    register char *ep;
    register int i = 0;
    int	num_written = 0;
    auto char buf[ENCWBSIZ];

    ep = encstr;

    while (size--)
    {
	buf[i++] = *start++ ^ *ep++ ;
	if (*ep == '\0')
 	   ep = encstr;

	if (i == ENCWBSIZ || size == 0) {
	    if (write(outf, buf, (unsigned)i) < i) 
		 return(num_written);
	    else {
		num_written += i;
		i = 0;
	    }
	}
    }
    return(num_written);
}

/*
 * perform an encrypted read
 */
int
encread(char *start, unsigned int size, int inf)
{
    register char *ep;
    register int read_size;

    if ((read_size = read(inf, start, size)) == -1 || read_size == 0)
	return read_size;

    ep = encstr;

    size = read_size;
    while (size--)
    {
	*start++ ^= *ep++;
	if (*ep == '\0')
	    ep = encstr;
    }
    return read_size;
}