Mercurial > hg > early-roguelike
view rogue4/xstr.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 | 9535a08ddc39 |
children |
line wrap: on
line source
/* * * Rogue: Exploring the Dungeons of Doom * Copyright (C) 1980, 1981, 1982 Michael Toy, Ken Arnold and Glenn Wichman * All rights reserved. * * See the file LICENSE.TXT for full copyright and licensing information. */ static char *sccsid = "@(#)xstr.c 4.1 (Berkeley) 10/1/80"; #include <stdio.h> #include <ctype.h> #include <sys/types.h> #include <signal.h> /* * xstr - extract and hash strings in a C program * * Bill Joy UCB * November, 1978 */ #define ignore(a) (a) char *calloc(); off_t tellpt; off_t hashit(); char *mktemp(); void onintr(int); char *savestr(); char *strcat(); char *strcpy(); off_t yankstr(); off_t mesgpt; char *strings = "strings"; int cflg; int vflg; int readstd; main(argc, argv) int argc; char *argv[]; { argc--, argv++; while (argc > 0 && argv[0][0] == '-') { register char *cp = &(*argv++)[1]; argc--; if (*cp == 0) { readstd++; continue; } do switch (*cp++) { case 'c': cflg++; continue; case 'v': vflg++; continue; default: fprintf(stderr, "usage: xstr [ -v ] [ -c ] [ - ] [ name ... ]\n"); } while (*cp); } if (signal(SIGINT, SIG_IGN) == SIG_DFL) signal(SIGINT, onintr); if (cflg || argc == 0 && !readstd) inithash(); else strings = mktemp(savestr("/tmp/xstrXXXXXX")); while (readstd || argc > 0) { if (freopen("x.c", "w", stdout) == NULL) perror("x.c"), exit(1); if (!readstd && freopen(argv[0], "r", stdin) == NULL) perror(argv[0]), exit(2); process("x.c"); if (readstd == 0) argc--, argv++; else readstd = 0; }; flushsh(); if (cflg == 0) xsdotc(); if (strings[0] == '/') ignore(md_unlink(strings)); exit(0); } process(name) char *name; { char *cp; char linebuf[BUFSIZ]; register int c; register int incomm = 0; printf("extern char\txstr[];\n"); for (;;) { if (fgets(linebuf, sizeof linebuf, stdin) == NULL) { if (ferror(stdin)) { perror(name); exit(3); } break; } if (linebuf[0] == '#') { if (linebuf[1] == ' ' && isdigit(linebuf[2])) printf("#line%s", &linebuf[1]); else printf("%s", linebuf); continue; } for (cp = linebuf; c = *cp++;) switch (c) { case '"': if (incomm) goto def; printf("(&xstr[%d])", (int) yankstr(&cp)); break; case '\'': if (incomm) goto def; putchar(c); if (*cp) putchar(*cp++); break; case '/': if (incomm || *cp != '*') goto def; incomm = 1; cp++; printf("/*"); continue; case '*': if (incomm && *cp == '/') { incomm = 0; cp++; printf("*/"); continue; } goto def; def: default: putchar(c); break; } } if (ferror(stdout)) perror("x.c"), onintr(-1); } off_t yankstr(cpp) register char **cpp; { register char *cp = *cpp; register int c, ch; char dbuf[BUFSIZ]; register char *dp = dbuf; register char *tp; while (c = *cp++) { switch (c) { case '"': cp++; goto out; case '\\': c = *cp++; if (c == 0) break; if (c == '\n') continue; for (tp = "b\bt\tr\rn\nf\f\\\\\"\""; ch = *tp++; tp++) if (c == ch) { c = *tp; goto gotc; } if (!octdigit(c)) { *dp++ = '\\'; break; } c -= '0'; if (!octdigit(*cp)) break; c <<= 3, c += *cp++ - '0'; if (!octdigit(*cp)) break; c <<= 3, c += *cp++ - '0'; break; } gotc: *dp++ = c; } out: *cpp = --cp; *dp = 0; return (hashit(dbuf, 1)); } octdigit(c) char c; { return (isdigit(c) && c != '8' && c != '9'); } inithash() { char buf[BUFSIZ]; register FILE *mesgread = fopen(strings, "r"); if (mesgread == NULL) return; for (;;) { mesgpt = tellpt; if (fgetNUL(buf, sizeof buf, mesgread) == 0) break; hashit(buf, 0); } ignore(fclose(mesgread)); } fgetNUL(obuf, rmdr, file) char *obuf; register int rmdr; FILE *file; { register c; register char *buf = obuf; while (--rmdr > 0 && (c = xgetc(file)) != 0 && c != EOF) *buf++ = c; *buf++ = 0; return ((feof(file) || ferror(file)) ? 0 : 1); } xgetc(file) FILE *file; { tellpt++; return (getc(file)); } #define BUCKETS 128 struct hash { off_t hpt; char *hstr; struct hash *hnext; short hnew; } bucket[BUCKETS]; off_t hashit(str, new) char *str; int new; { int i; register struct hash *hp, *hp0; hp = hp0 = &bucket[lastchr(str) & 0177]; while (hp->hnext) { hp = hp->hnext; i = istail(str, hp->hstr); if (i >= 0) return (hp->hpt + i); } hp = (struct hash *) calloc(1, sizeof (*hp)); hp->hpt = mesgpt; hp->hstr = savestr(str); mesgpt += strlen(hp->hstr) + 1; hp->hnext = hp0->hnext; hp->hnew = new; hp0->hnext = hp; return (hp->hpt); } flushsh() { register int i; register struct hash *hp; register FILE *mesgwrit; register int old = 0, new = 0; for (i = 0; i < BUCKETS; i++) for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext) if (hp->hnew) new++; else old++; if (new == 0 && old != 0) return; mesgwrit = fopen(strings, old ? "a" : "w"); for (i = 0; i < BUCKETS; i++) for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext) { found(hp->hnew, hp->hpt, hp->hstr); if (hp->hnew) { fseek(mesgwrit, hp->hpt, 0); ignore(fwrite(hp->hstr, strlen(hp->hstr) + 1, 1, mesgwrit)); if (ferror(mesgwrit)) perror(strings), exit(4); } } ignore(fclose(mesgwrit)); } found(new, off, str) int new; off_t off; char *str; { if (vflg == 0) return; if (!new) fprintf(stderr, "found at %d:", (int) off); else fprintf(stderr, "new at %d:", (int) off); prstr(str); fprintf(stderr, "\n"); } prstr(cp) register char *cp; { register int c; while (c = (*cp++ & 0377)) if (c < ' ') fprintf(stderr, "^%c", c + '`'); else if (c == 0177) fprintf(stderr, "^?"); else if (c > 0200) fprintf(stderr, "\\%03o", c); else fprintf(stderr, "%c", c); } xsdotc() { register FILE *strf = fopen(strings, "r"); register FILE *xdotcf; if (strf == NULL) perror(strings), exit(5); xdotcf = fopen("xs.c", "w"); if (xdotcf == NULL) perror("xs.c"), exit(6); fprintf(xdotcf, "char\txstr[] = {\n"); for (;;) { register int i, c; for (i = 0; i < 20; i++) { c = getc(strf); if (ferror(strf)) { perror(strings); onintr(-1); } if (feof(strf)) { fprintf(xdotcf, "\n"); goto out; } fprintf(xdotcf, "%d,", c); } fprintf(xdotcf, "\n"); } out: fprintf(xdotcf, "};\n"); ignore(fclose(xdotcf)); ignore(fclose(strf)); } char * savestr(cp) register char *cp; { register char *dp = (char *) calloc(1, strlen(cp) + 1); return (strcpy(dp, cp)); } Ignore(void *a) { a = a; } ignorf(a) void (*a)(); { a = a; } lastchr(cp) register char *cp; { while (cp[0] && cp[1]) cp++; return (*cp); } istail(str, of) register char *str, *of; { register int d = strlen(of) - strlen(str); if (d < 0 || strcmp(&of[d], str) != 0) return (-1); return (d); } void onintr(int sig) { ignorf(signal(SIGINT, SIG_IGN)); if (strings[0] == '/') ignore(md_unlink(strings)); ignore(md_unlink("x.c")); ignore(md_unlink("xs.c")); exit(7); }