Mercurial > hg > early-roguelike
view rogue3/save.c @ 227:696277507a2e
Rogue V4, V5: disable a cheat granting permanent monster detection.
In these two games, a potion of monster detection turns on the player's
SEEMONST flag. A fuse is set to call turn_see() to turn the flag back
off. But the save and restore functions do not recognize turn_see() and
fail to set the fuse up again.
When restoring, Rogue V4 merely sets the fuse's function to NULL and
leaves it burning. When it goes off, a segfault results. Rogue V5
clears all the fuse's fields, and the player retains the ability to see
all monsters on the level.
The save and restore code can now handle the fuse. The function used is
a new wrapper, turn_see_off(), which should lead to less problems with
daemons being multiple incompatible types.
Also, Rogue V4 and Super-Rogue now properly clear unrecognized daemon
and fuse slots when restoring a saved game.
author | John "Elwin" Edwards |
---|---|
date | Sat, 05 Mar 2016 12:10:20 -0500 |
parents | d852b8f088c5 |
children | 3d4252fa2ed3 |
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/* * save and restore routines * * @(#)save.c 3.9 (Berkeley) 6/16/81 * * 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. */ #include "curses.h" #include <ctype.h> #include <sys/types.h> #include <sys/stat.h> #include <signal.h> #include <errno.h> #include <string.h> #include <stdlib.h> #include "machdep.h" #include "rogue.h" typedef struct stat STAT; extern char version[], encstr[]; STAT sbuf; int save_game() { FILE *savef; int c; char buf[80]; /* * 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(cw); } 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) return FALSE; /* because you're not allowed to change the savefile if you're using the system savedir! */ } do { msg("File name: "); mpos = 0; buf[0] = '\0'; if (get_str(buf, cw) == QUIT) { msg(""); return FALSE; } strcpy(file_name, buf); gotfile: if ((savef = fopen(file_name, "w")) == NULL) { msg(strerror(errno)); /* fake perror() */ if (use_savedir) return FALSE; } } while (savef == NULL); /* * write out encrypted file (after a stat) * The fwrite is to force allocation of the buffer before the write */ if (save_file(savef) != 0) { msg("Save game failed!"); return FALSE; } return TRUE; } /* * automatically save a file. This is used if a HUP signal is * recieved */ void auto_save(int p) { FILE *savef; int i; for (i = 0; i < NSIG; i++) signal(i, SIG_IGN); if (file_name[0] != '\0' && (savef = fopen(file_name, "w")) != NULL) save_file(savef); endwin(); exit(1); } /* * write the saved game on the file */ int save_file(FILE *savef) { char buf[80]; int ret; wmove(cw, LINES-1, 0); draw(cw); (void) fseek(savef, 0L, 0); memset(buf,0,80); strcpy(buf,version); encwrite(buf,80,savef); memset(buf,0,80); strcpy(buf,"R36 2\n"); encwrite(buf,80,savef); memset(buf,0,80); sprintf(buf,"%d x %d\n", LINES, COLS); encwrite(buf,80,savef); ret = rs_save_file(savef); fclose(savef); return(ret); } int restore(char *file, char **envp) { FILE *inf; extern char **environ; char buf[80]; int slines, scols; int rogue_version = 0, savefile_version = 0; if (strcmp(file, "-r") == 0) file = file_name; if ((inf = fopen(file, "r")) == NULL) { if (use_savedir && errno == ENOENT) { /* We're using the system savefile and it doesn't exist. * This isn't a fatal error, we'll just start a new game. */ return TRUE; } else { perror(file); return FALSE; } } fflush(stdout); encread(buf, 80, inf); if (strcmp(buf, version) != 0) { printf("Sorry, saved game is out of date.\n"); return FALSE; } encread(buf, 80, inf); (void) sscanf(buf, "R%d %d\n", &rogue_version, &savefile_version); if ((rogue_version != 36) && (savefile_version != 2)) { printf("Sorry, saved game format is out of date.\n"); return FALSE; } encread(buf,80,inf); (void) sscanf(buf,"%d x %d\n",&slines, &scols); /* * we do not close the file so that we will have a hold of the * inode for as long as possible */ initscr(); if (slines > LINES) { endwin(); printf("Sorry, original game was played on a screen with %d lines.\n",slines); printf("Current screen only has %d lines. Unable to restore game\n",LINES); return(FALSE); } if (scols > COLS) { endwin(); printf("Sorry, original game was played on a screen with %d columns.\n",scols); printf("Current screen only has %d columns. Unable to restore game\n",COLS); return(FALSE); } cw = newwin(LINES, COLS, 0, 0); mw = newwin(LINES, COLS, 0, 0); hw = newwin(LINES, COLS, 0, 0); nonl(); nocrmode(); keypad(cw,1); mpos = 0; mvwprintw(cw, 0, 0, "%s", file); if (rs_restore_file(inf) != 0) { endwin(); printf("Cannot restore file\n"); return(FALSE); } if (!wizard && (md_unlink_open_file(file, inf) < 0)) { endwin(); printf("Cannot unlink file\n"); return FALSE; } if (pstats.s_hpt <= 0) { endwin(); printf("This character is already dead.\n"); return FALSE; } environ = envp; strcpy(file_name, file); setup(); clearok(curscr, TRUE); touchwin(cw); srand(md_getpid()); status(); playit(); /*NOTREACHED*/ return(0); } static int encerrno = 0; int encerror() { return encerrno; } void encseterr(int err) { encerrno = err; } int encclearerr() { int n = encerrno; encerrno = 0; return(n); } /* * perform an encrypted write */ size_t encwrite(const void *buf, size_t size, FILE *outf) { char *ep; const char *start = buf; size_t o_size = size; ep = encstr; while (size) { if (putc(*start++ ^ *ep++, outf) == EOF) return(o_size - size); if (*ep == '\0') ep = encstr; size--; } return(o_size - size); } /* * perform an encrypted read */ size_t encread(void *buf, size_t size, FILE *inf) { char *ep; size_t read_size; char *start = buf; if ((read_size = fread(start,1,size,inf)) == 0) return 0; ep = encstr; while (size--) { *start++ ^= *ep++; if (*ep == '\0') ep = encstr; } return read_size; }