*
* 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;
part=transitive;
goto Laction;
}
- if (closecheck())
+ if (closecheck()) {
if (game.closed)
return true;
- else
- goto L19999;
-
- lampcheck();
+ } else
+ lampcheck();
- L19999:
k=43;
if (LIQLOC(game.loc) == WATER)k=70;
V1=VOCAB(WD1,-1);
Laction:
switch (action(cmdin, part, VERB, obj)) {
- case 2:
+ case GO_TERMINATE:
return true;
- case 8:
+ case GO_MOVE:
playermove(cmdin, VERB, NUL);
return true;
- case 2000: continue; /* back to top of main interpreter loop */
- case 2012: goto L2012;
- case 2600: goto L2600;
- case 2607: goto L2607;
- case 2630: goto L2630;
- case 2800:
+ 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 8000:
+ 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 19000:
+ case GO_DWARFWAKE:
/* Oh dear, he's disturbed the dwarves. */
RSPEAK(136);
score(0);
projects / open-adventure.git / blobdiff