*
* The author - Don Woods - apologises for the style of the code; it
* is a result of running the original Fortran IV source through a
- * home-brew Fortran-to-C converter.)
+ * home-brew Fortran-to-C converter.
*
- * Now that the code has been restructured into idiomatic C, the following
- * is more appropriate:
+ * Now that the code has been restructured into something much closer
+ * to idiomatic C, the following is more appropriate:
*
- * ESR apologizes for the remaing gotos (now confined to two functions in this
- * file - they used to be *everywhere*), and the offensive globals. Applying
- * the Structured Program Theorem can be hard.
+ * ESR apologizes for the remaing gotos (now confined to two functions
+ * in this file - there used to be over 350 of them, *everywhere*),
+ * and for the offensive globals. Applying the Structured Program
+ * Theorem can be hard.
*/
#include <stdlib.h>
#include <stdio.h>
FILE *logfp;
bool oldstyle = false;
+bool editline = true;
+bool prompt = true;
lcg_state lcgstate;
extern void initialise();
/* Options. */
- while ((ch = getopt(argc, argv, "l:o")) != EOF) {
+ while ((ch = getopt(argc, argv, "l:os")) != EOF) {
switch (ch) {
-case 'l':
+ case 'l':
logfp = fopen(optarg, "w");
if (logfp == NULL)
fprintf(stderr,
break;
case 'o':
oldstyle = true;
+ editline = prompt = false;
+ break;
+ case 's':
+ editline = false;
break;
}
}
game.dloc[PIRATE]=game.chloc;
game.odloc[PIRATE]=game.chloc;
game.dseen[PIRATE]=false;
+ /* C doesn't have what the Structured rogramming
+ * Theorem says we need here - multi-level loop
+ * breakout. We simulate with a goto. Irreducible, alas.
+ */
goto jumpout;
}
if (HERE(j))
}
LL=LL/1000;
- for (;;) {
- game.newloc=LL/1000;
- motion=MOD(game.newloc,100);
- if (game.newloc <= 300) {
- if (game.newloc <= 100) {
- if (game.newloc == 0 || PCT(game.newloc))
- break;
+ do {
+ /*
+ * (ESR) This special-travel loop may have to be repeated if it includes
+ * the plover passage. Same deal for any future cases wgerw we beed to
+ * block travel and then redo it once the blocking condition has been
+ * removed.
+ */
+ for (;;) {
+ game.newloc=LL/1000;
+ motion=MOD(game.newloc,100);
+ if (game.newloc <= 300) {
+ if (game.newloc <= 100) {
+ if (game.newloc == 0 || PCT(game.newloc))
+ break;
+ /* else fall through */
+ } if (TOTING(motion) || (game.newloc > 200 && AT(motion)))
+ break;
/* else fall through */
- } if (TOTING(motion) || (game.newloc > 200 && AT(motion)))
- break;
- /* else fall through */
+ }
+ else if (game.prop[motion] != game.newloc/100-3)
+ break;
+ do {
+ if (TRAVEL[KK] < 0)BUG(25);
+ ++KK;
+ game.newloc=labs(TRAVEL[KK])/1000;
+ } while
+ (game.newloc == LL);
+ LL=game.newloc;
}
- else if (game.prop[motion] != game.newloc/100-3)
- break;
- L12:
- do {
- if (TRAVEL[KK] < 0)BUG(25);
- ++KK;
- game.newloc=labs(TRAVEL[KK])/1000;
- } while
- (game.newloc == LL);
- LL=game.newloc;
- }
- game.newloc=MOD(LL,1000);
- if (game.newloc <= 300)
- return true;
- if (game.newloc <= 500) {
- game.newloc=game.newloc-300;
- switch (game.newloc)
- {
- case 1:
- /* Travel 301. Plover-alcove passage. Can carry only
- * emerald. Note: travel table must include "useless"
- * entries going through passage, which can never be used for
- * actual motion, but can be spotted by "go back". */
- game.newloc=99+100-game.loc;
- if (game.holdng == 0 || (game.holdng == 1 && TOTING(EMRALD)))
- return true;
- game.newloc=game.loc;
- RSPEAK(117);
+ game.newloc=MOD(LL,1000);
+ if (game.newloc <= 300)
return true;
- case 2:
- /* Travel 302. Plover transport. Drop the emerald (only use
- * special travel if toting it), so he's forced to use the
- * plover-passage to get it out. Having dropped it, go back and
- * pretend he wasn't carrying it after all. */
- DROP(EMRALD,game.loc);
- goto L12;
- case 3:
- /* Travel 303. Troll bridge. Must be done only as special
- * motion so that dwarves won't wander across and encounter
- * the bear. (They won't follow the player there because
- * that region is forbidden to the pirate.) If
- * game.prop(TROLL)=1, he's crossed since paying, so step out
- * and block him. (standard travel entries check for
- * game.prop(TROLL)=0.) Special stuff for bear. */
- if (game.prop[TROLL] == 1) {
- PSPEAK(TROLL,1);
- game.prop[TROLL]=0;
- MOVE(TROLL2,0);
- MOVE(TROLL2+NOBJECTS,0);
- MOVE(TROLL,PLAC[TROLL]);
- MOVE(TROLL+NOBJECTS,FIXD[TROLL]);
- JUGGLE(CHASM);
+ if (game.newloc <= 500) {
+ game.newloc=game.newloc-300;
+ switch (game.newloc)
+ {
+ case 1:
+ /* Travel 301. Plover-alcove passage. Can carry only
+ * emerald. Note: travel table must include "useless"
+ * entries going through passage, which can never be used for
+ * actual motion, but can be spotted by "go back". */
+ game.newloc=99+100-game.loc;
+ if (game.holdng == 0 || (game.holdng == 1 && TOTING(EMRALD)))
+ return true;
game.newloc=game.loc;
+ RSPEAK(117);
return true;
- } else {
- game.newloc=PLAC[TROLL]+FIXD[TROLL]-game.loc;
- if (game.prop[TROLL] == 0)game.prop[TROLL]=1;
- if (!TOTING(BEAR)) return true;
- RSPEAK(162);
- game.prop[CHASM]=1;
- game.prop[TROLL]=2;
- DROP(BEAR,game.newloc);
- game.fixed[BEAR]= -1;
- game.prop[BEAR]=3;
- game.oldlc2=game.newloc;
- croak(cmdin);
- return false;
+ case 2:
+ /* Travel 302. Plover transport. Drop the emerald (only use
+ * special travel if toting it), so he's forced to use the
+ * plover-passage to get it out. Having dropped it, go back and
+ * pretend he wasn't carrying it after all. */
+ DROP(EMRALD,game.loc);
+ do {
+ if (TRAVEL[KK] < 0)BUG(25);
+ ++KK;
+ game.newloc=labs(TRAVEL[KK])/1000;
+ } while
+ (game.newloc == LL);
+ continue; /* back to top of do/while loop */
+ case 3:
+ /* Travel 303. Troll bridge. Must be done only as special
+ * motion so that dwarves won't wander across and encounter
+ * the bear. (They won't follow the player there because
+ * that region is forbidden to the pirate.) If
+ * game.prop(TROLL)=1, he's crossed since paying, so step out
+ * and block him. (standard travel entries check for
+ * game.prop(TROLL)=0.) Special stuff for bear. */
+ if (game.prop[TROLL] == 1) {
+ PSPEAK(TROLL,1);
+ game.prop[TROLL]=0;
+ MOVE(TROLL2,0);
+ MOVE(TROLL2+NOBJECTS,0);
+ MOVE(TROLL,PLAC[TROLL]);
+ MOVE(TROLL+NOBJECTS,FIXD[TROLL]);
+ JUGGLE(CHASM);
+ game.newloc=game.loc;
+ return true;
+ } else {
+ game.newloc=PLAC[TROLL]+FIXD[TROLL]-game.loc;
+ if (game.prop[TROLL] == 0)game.prop[TROLL]=1;
+ if (!TOTING(BEAR)) return true;
+ RSPEAK(162);
+ game.prop[CHASM]=1;
+ game.prop[TROLL]=2;
+ DROP(BEAR,game.newloc);
+ game.fixed[BEAR]= -1;
+ game.prop[BEAR]=3;
+ game.oldlc2=game.newloc;
+ croak(cmdin);
+ return false;
+ }
}
+ BUG(20);
}
- BUG(20);
- }
+ } while
+ (false);
RSPEAK(game.newloc-500);
game.newloc=game.loc;
return true;
if (game.tally == 0 && INDEEP(game.loc) && game.loc != 33)
--game.clock1;
-
/* When the first warning comes, we lock the grate, destroy
* the bridge, kill all the dwarves (and the pirate), remove
* the troll and bear (unless dead), and set "closng" to
}
static bool do_command(FILE *cmdin)
+/* Get and execute a command */
{
long KQ, VERB, KK, V1, V2;
long i, k, KMOD;
/* Describe the current location and (maybe) get next command. */
- /* Print text for current loc. */
-
-L2000:
- if (game.loc == 0)
- croak(cmdin);
- char* msg = short_location_descriptions[game.loc];
- if (MOD(game.abbrev[game.loc],game.abbnum) == 0 || msg == 0)
- msg=long_location_descriptions[game.loc];
- if (!FORCED(game.loc) && DARK(game.loc)) {
- /* The easiest way to get killed is to fall into a pit in
- * pitch darkness. */
- if (game.wzdark && PCT(35)) {
- RSPEAK(23);
- game.oldlc2 = game.loc;
+ for (;;) {
+ if (game.loc == 0)
croak(cmdin);
- goto L2000;
+ char* msg = short_location_descriptions[game.loc];
+ if (MOD(game.abbrev[game.loc],game.abbnum) == 0 || msg == 0)
+ msg=long_location_descriptions[game.loc];
+ if (!FORCED(game.loc) && DARK(game.loc)) {
+ /* The easiest way to get killed is to fall into a pit in
+ * pitch darkness. */
+ if (game.wzdark && PCT(35)) {
+ RSPEAK(23);
+ game.oldlc2 = game.loc;
+ croak(cmdin);
+ continue; /* back to top of main interpreter loop */
+ }
+ msg=arbitrary_messages[16];
}
- msg=arbitrary_messages[16];
- }
- if (TOTING(BEAR))RSPEAK(141);
- newspeak(msg);
- if (FORCED(game.loc)) {
- if (playermove(cmdin, VERB, 1))
- return true;
- else
- goto L2000;
- }
- if (game.loc == 33 && PCT(25) && !game.closng)RSPEAK(7);
+ if (TOTING(BEAR))RSPEAK(141);
+ newspeak(msg);
+ if (FORCED(game.loc)) {
+ if (playermove(cmdin, VERB, 1))
+ return true;
+ else
+ continue; /* back to top of main interpreter loop */
+ }
+ if (game.loc == 33 && PCT(25) && !game.closng)RSPEAK(7);
- listobjects();
+ listobjects();
+
+ L2012:
+ VERB=0;
+ game.oldobj=obj;
+ obj=0;
-L2012:
- VERB=0;
- game.oldobj=obj;
- obj=0;
+ L2600:
+ checkhints(cmdin);
-L2600:
- checkhints(cmdin);
-
- /* If closing time, check for any objects being toted with
- * game.prop < 0 and set the prop to -1-game.prop. This way
- * objects won't be described until they've been picked up
- * and put down separate from their respective piles. Don't
- * tick game.clock1 unless well into cave (and not at Y2). */
- if (game.closed) {
- if (game.prop[OYSTER] < 0 && TOTING(OYSTER))
- PSPEAK(OYSTER,1);
- for (i=1; i<=NOBJECTS; i++) {
- if (TOTING(i) && game.prop[i] < 0)
- game.prop[i] = -1-game.prop[i];
+ /* If closing time, check for any objects being toted with
+ * game.prop < 0 and set the prop to -1-game.prop. This way
+ * objects won't be described until they've been picked up
+ * and put down separate from their respective piles. Don't
+ * tick game.clock1 unless well into cave (and not at Y2). */
+ if (game.closed) {
+ if (game.prop[OYSTER] < 0 && TOTING(OYSTER))
+ PSPEAK(OYSTER,1);
+ for (i=1; i<=NOBJECTS; i++) {
+ if (TOTING(i) && game.prop[i] < 0)
+ game.prop[i] = -1-game.prop[i];
+ }
}
- }
- game.wzdark=DARK(game.loc);
- if (game.knfloc > 0 && game.knfloc != game.loc)
- game.knfloc=0;
+ game.wzdark=DARK(game.loc);
+ if (game.knfloc > 0 && game.knfloc != game.loc)
+ game.knfloc=0;
- /* This is where we get a new command from the user */
- if (!GETIN(cmdin, &WD1,&WD1X,&WD2,&WD2X))
- return false;
+ /* This is where we get a new command from the user */
+ if (!GETIN(cmdin, &WD1,&WD1X,&WD2,&WD2X))
+ return false;
- /* Every input, check "game.foobar" flag. If zero, nothing's
- * going on. If pos, make neg. If neg, he skipped a word,
- * so make it zero. */
-L2607:
- game.foobar=(game.foobar>0 ? -game.foobar : 0);
- ++game.turns;
- if (game.turns == game.thresh) {
- newspeak(turn_threshold_messages[game.trndex]);
- game.trnluz=game.trnluz+TRNVAL[game.trndex]/100000;
- ++game.trndex;
- game.thresh = -1;
- if (game.trndex <= TRNVLS)
- game.thresh=MOD(TRNVAL[game.trndex],100000)+1;
- }
- if (VERB == SAY && WD2 > 0)
- VERB=0;
- if (VERB == SAY) {
- part=transitive;
- goto Laction;
- }
- if (closecheck())
- if (game.closed)
- return true;
- else
- goto L19999;
-
- lampcheck();
+ /* Every input, check "game.foobar" flag. If zero, nothing's
+ * going on. If pos, make neg. If neg, he skipped a word,
+ * so make it zero. */
+ L2607:
+ game.foobar=(game.foobar>0 ? -game.foobar : 0);
+ ++game.turns;
+ if (game.turns == game.thresh) {
+ newspeak(turn_threshold_messages[game.trndex]);
+ game.trnluz=game.trnluz+TRNVAL[game.trndex]/100000;
+ ++game.trndex;
+ game.thresh = -1;
+ if (game.trndex <= TRNVLS)
+ game.thresh=MOD(TRNVAL[game.trndex],100000)+1;
+ }
+ if (VERB == SAY && WD2 > 0)
+ VERB=0;
+ if (VERB == SAY) {
+ part=transitive;
+ goto Laction;
+ }
+ if (closecheck()) {
+ if (game.closed)
+ return true;
+ } else
+ lampcheck();
-L19999:
- k=43;
- if (LIQLOC(game.loc) == WATER)k=70;
- V1=VOCAB(WD1,-1);
- V2=VOCAB(WD2,-1);
- if (V1 == ENTER && (V2 == STREAM || V2 == 1000+WATER)) {
- RSPEAK(k);
- goto L2012;
- }
- if (V1 == ENTER && WD2 > 0) {
- WD1=WD2;
- WD1X=WD2X;
- WD2=0;
- } else {
- if (!((V1 != 1000+WATER && V1 != 1000+OIL) ||
- (V2 != 1000+PLANT && V2 != 1000+DOOR))) {
- if (AT(V2-1000))
- WD2=MAKEWD(16152118);
+ k=43;
+ if (LIQLOC(game.loc) == WATER)k=70;
+ V1=VOCAB(WD1,-1);
+ V2=VOCAB(WD2,-1);
+ if (V1 == ENTER && (V2 == STREAM || V2 == 1000+WATER)) {
+ RSPEAK(k);
+ goto L2012;
}
- if (V1 == 1000+CAGE && V2 == 1000+BIRD && HERE(CAGE) && HERE(BIRD))
- WD1=MAKEWD(301200308);
- }
-L2620:
- if (WD1 == MAKEWD(23051920)) {
- ++game.iwest;
- if (game.iwest == 10)
- RSPEAK(17);
- }
- if (WD1 == MAKEWD( 715) && WD2 != 0) {
- if (++igo == 10)
- RSPEAK(276);
- }
-L2630:
- i=VOCAB(WD1,-1);
- if (i == -1) {
- /* Gee, I don't understand. */
- if (fallback_handler(rawbuf))
+ if (V1 == ENTER && WD2 > 0) {
+ WD1=WD2;
+ WD1X=WD2X;
+ WD2=0;
+ } else {
+ if (!((V1 != 1000+WATER && V1 != 1000+OIL) ||
+ (V2 != 1000+PLANT && V2 != 1000+DOOR))) {
+ if (AT(V2-1000))
+ WD2=MAKEWD(16152118);
+ }
+ if (V1 == 1000+CAGE && V2 == 1000+BIRD && HERE(CAGE) && HERE(BIRD))
+ WD1=MAKEWD(301200308);
+ }
+ L2620:
+ if (WD1 == MAKEWD(23051920)) {
+ ++game.iwest;
+ if (game.iwest == 10)
+ RSPEAK(17);
+ }
+ if (WD1 == MAKEWD( 715) && WD2 != 0) {
+ if (++igo == 10)
+ RSPEAK(276);
+ }
+ L2630:
+ i=VOCAB(WD1,-1);
+ if (i == -1) {
+ /* Gee, I don't understand. */
+ if (fallback_handler(rawbuf))
+ return true;
+ SETPRM(1,WD1,WD1X);
+ RSPEAK(254);
+ goto L2600;
+ }
+ KMOD=MOD(i,1000);
+ KQ=i/1000+1;
+ switch (KQ-1)
+ {
+ case 0:
+ if (playermove(cmdin, VERB, KMOD))
+ return true;
+ else
+ continue; /* back to top of main interpreter loop */
+ case 1: part=unknown; obj = KMOD; break;
+ case 2: part=intransitive; VERB = KMOD; break;
+ case 3: RSPEAK(KMOD); goto L2012;
+ default: BUG(22);
+ }
+
+ Laction:
+ switch (action(cmdin, part, VERB, obj)) {
+ case GO_TERMINATE:
return true;
- SETPRM(1,WD1,WD1X);
- RSPEAK(254);
- goto L2600;
- }
- KMOD=MOD(i,1000);
- KQ=i/1000+1;
- switch (KQ-1)
- {
- case 0:
- if (playermove(cmdin, VERB, KMOD))
+ case GO_MOVE:
+ playermove(cmdin, VERB, NUL);
return true;
- else
- goto L2000;
- case 1: part=unknown; obj = KMOD; break;
- case 2: part=intransitive; VERB = KMOD; break;
- case 3: RSPEAK(KMOD); goto L2012;
- default: BUG(22);
- }
-
-Laction:
- switch (action(cmdin, part, VERB, obj)) {
- case 2: return true;
- case 8:
- if (playermove(cmdin, VERB, NUL))
+ case GO_TOP: continue; /* back to top of main interpreter loop */
+ case GO_CLEAROBJ: goto L2012;
+ case GO_CHECKHINT: goto L2600;
+ case GO_CHECKFOO: goto L2607;
+ case GO_LOOKUP: goto L2630;
+ case GO_WORD2:
+ /* Get second word for analysis. */
+ WD1=WD2;
+ WD1X=WD2X;
+ WD2=0;
+ goto L2620;
+ case GO_UNKNOWN:
+ /* Random intransitive verbs come here. Clear obj just in case
+ * (see attack()). */
+ SETPRM(1,WD1,WD1X);
+ RSPEAK(257);
+ obj=0;
+ goto L2600;
+ case GO_DWARFWAKE:
+ /* Oh dear, he's disturbed the dwarves. */
+ RSPEAK(136);
+ score(0);
return true;
- else
- goto L2000;
- case 2000: goto L2000;
- case 2012: goto L2012;
- case 2600: goto L2600;
- case 2607: goto L2607;
- case 2630: goto L2630;
- case 2800:
- /* Get second word for analysis. */
- WD1=WD2;
- WD1X=WD2X;
- WD2=0;
- goto L2620;
- case 8000:
- /* Random intransitive verbs come here. Clear obj just in case
- * (see attack()). */
- SETPRM(1,WD1,WD1X);
- RSPEAK(257);
- obj=0;
- goto L2600;
- case 19000:
- /* Oh dear, he's disturbed the dwarves. */
- RSPEAK(136);
- score(0);
- return true;
- default:
- BUG(99);
+ default:
+ BUG(99);
+ }
}
}
+
+/* end */
projects / open-adventure.git / blobdiff