--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/arogue7/save.c	Fri May 08 15:24:40 2015 -0400
@@ -0,0 +1,302 @@
+/*
+ * 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 <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
+
+typedef struct stat STAT;
+
+extern char version[], encstr[];
+/* extern bool _endwin; */
+extern int errno;
+
+STAT sbuf;
+
+bool
+save_game()
+{
+    register int savefd;
+    register int c;
+    char buf[LINELEN];
+
+    /*
+     * get file name
+     */
+    mpos = 0;
+    if (file_name[0] != '\0')
+    {
+	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;
+	}
+    }
+
+    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() */
+    } while (savefd < 0);
+
+    /*
+     * write out encrpyted file (after a stat)
+     */
+    if (save_file(savefd) == FALSE) {
+	msg("Cannot create save file.");
+	unlink(file_name);
+	return(FALSE);
+    }
+    else return(TRUE);
+}
+
+/*
+ * automatically save a file.  This is used if a HUP signal is
+ * recieved
+ */
+void
+auto_save(sig)
+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(savefd)
+register 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 *) fdopen(savefd,"wb");
+    ret = rs_save_file(savef);
+    fclose(savef);
+    if (num_to_write == num_written && ret == 0) return(TRUE);
+    else return(FALSE);
+}
+
+restore(file, envp)
+register 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)
+    {
+	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;
+    mvwprintw(msgw, 0, 0, "%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
+ */
+encwrite(start, size, outf)
+register char *start;
+register unsigned size;
+register 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
+ */
+encread(start, size, inf)
+register char *start;
+register unsigned size;
+register 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;
+}