Mercurial > hg > early-roguelike
view xrogue/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 | f54901b9c39b |
children | d3968e9cb98d |
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/* save.c - save and restore routines XRogue: Expeditions into the Dungeons of Doom Copyright (C) 1991 Robert Pietkivitch All rights reserved. Based on "Advanced Rogue" Copyright (C) 1984, 1985 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. */ #include <curses.h> #include <ctype.h> #include <string.h> #include <stdlib.h> #include <sys/types.h> #include <signal.h> #include <fcntl.h> #include <errno.h> #include "rogue.h" #include "mach_dep.h" extern char version[]; extern unsigned char encstr[]; extern int big_endian; bool rs_write_int(FILE *savef, int c); bool rs_read_int(int inf, int *i); bool rs_save_file(FILE *savef); bool rs_restore_file(int inf); int md_unlink(char *file); bool save_file(FILE *savef); bool save_game(void) { register FILE *savef; 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 = wgetch(cw); if (c == ESC) 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; } } else goto gotfile; /* must save to file restored from */ 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 ((savef = fopen(file_name, "wb")) == NULL) { msg(strerror(errno)); if (use_savedir) return FALSE; } } while (savef == NULL); msg(""); /* * write out encrpyted file */ if (save_file(savef) == FALSE) { fclose(savef); msg("Cannot create save file."); md_unlink(file_name); return(FALSE); } fclose(savef); return(TRUE); } /* * automatically save a file. This is used if a HUP signal is recieved */ void auto_save(int sig) { register FILE *savef = NULL; register int i; NOOP(sig); for (i = 0; i < NSIG; i++) signal(i, SIG_IGN); if (file_name[0] != '\0' && pstats.s_hpt > 0 && ((savef = fopen(file_name, "wb")) != NULL)) save_file(savef); fclose(savef); exit_game(EXIT_ENDWIN); } /* * write the saved game on the file */ bool save_file(FILE *savef) { int slines = LINES; int scols = COLS; bool ret = FALSE; int endian = 0x01020304; big_endian = ( *((char *)&endian) == 0x01 ); wmove(cw, LINES-1, 0); draw(cw); encwrite(version,strlen(version)+1,savef); rs_write_int(savef,slines); rs_write_int(savef,scols); ret = rs_save_file(savef); return(ret); } bool restore(char *file, char *envp[]) { register int inf; extern char **environ; char buf[LINELEN]; int endian = 0x01020304; big_endian = ( *((char *)&endian) == 0x01 ); if (strcmp(file, "-r") == 0) file = file_name; if ((inf = open(file, O_RDONLY)) < 0) { if (use_savedir && errno == ENOENT) { /* No game in progress, so one will be started. */ 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; } fflush(stdout); rs_read_int(inf,&lines); rs_read_int(inf,&cols); initscr(); if (lines > LINES) { endwin(); printf("Sorry, original game was played on a screen with %d lines.\n",lines); printf("Current screen only has %d lines. Unable to restore game\n",LINES); return(FALSE); } if (cols > COLS) { endwin(); printf("Sorry, original game was played on a screen with %d columns.\n",cols); printf("Current screen only has %d columns. Unable to restore game\n",COLS); return(FALSE); } typeahead(-1); setup(); 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, TRUE); keypad(hw, TRUE); if (rs_restore_file(inf) == FALSE) { endwin(); printf("Cannot restore file\n"); close(inf); return(FALSE); } close(inf); if (!wizard) md_unlink(file); mpos = 0; environ = envp; strcpy(file_name, file); clearok(curscr, TRUE); touchwin(cw); wrefresh(cw); msg("Welcome back! --More-- "); wait_for(' '); msg(""); playit(); /*NOTREACHED*/ return FALSE; } #define ENCWBSIZ 1024 /* * perform an encrypted write */ long encwrite(char *start, unsigned long size, FILE *outf) { register unsigned char *ep; register int i = 0; unsigned long num_written = 0; char buf[ENCWBSIZ]; int ret; ep = encstr; while (size--) { buf[i++] = *start++ ^ *ep++; if (*ep == '\0') ep = encstr; if (i == ENCWBSIZ || size == 0) { ret = (unsigned int) fwrite(buf, 1, i, outf); if (ret > 0) num_written += ret; if (ret < i) return(num_written); i = 0; } } return(num_written); } #define ENCRBSIZ 32768 /* * perform an encrypted read */ long encread(char *start, unsigned long size, int inf) { register unsigned char *ep; register int rd_siz; register unsigned long total_read; total_read = 0; while (total_read < size) { rd_siz = ENCRBSIZ; rd_siz = ((size-total_read) > ENCRBSIZ) ? ENCRBSIZ : (size-total_read); rd_siz = read(inf,&start[total_read],rd_siz); if(rd_siz==-1 || rd_siz==0) break; total_read += rd_siz; } ep = encstr; size = total_read; while (size--) { *start++ ^= *ep++; if (*ep == '\0') ep = encstr; } return total_read; }