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Eliminate some promiscuous variable reuse.

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This was making the opcode-conditional evaluation logic much more
difficult to read than it needed to be.
This commit is contained in:
Eric S. Raymond 2017-06-28 21:06:36 -04:00
parent 7281c39807
commit 9d918edeaa
1 changed files with 11 additions and 10 deletions
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21
main.c
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@ -624,32 +624,33 @@ static bool playermove(token_t verb, int motion)
*/
for (;;) { /* L12 loop */
for (;;) {
game.newloc = scratchloc / 1000;
long arg = MOD(game.newloc, 100);
if (!SPECIAL(game.newloc)) {
long cond = scratchloc / 1000;
long arg = MOD(cond, 100);
if (!SPECIAL(cond)) {
/* YAML N and [pct N] conditionals */
if (game.newloc <= 100) {
if (game.newloc == 0 || PCT(game.newloc))
if (cond <= 100) {
if (cond == 0 || PCT(cond))
break;
/* else fall through */
}
/* YAML [with OBJ] clause */
if (TOTING(arg) || (game.newloc > 200 && AT(arg)))
if (TOTING(arg) || (cond > 200 && AT(arg)))
break;
/* else fall through to check [not OBJ STATE] */
} else if (game.prop[arg] != game.newloc / 100 - 3)
} else if (game.prop[arg] != cond / 100 - 3)
break;
/* We arrive here on conditional failure.
* Skip to next non-matching destination */
long nextup;
do {
if (travel[kk].stop)
BUG(CONDITIONAL_TRAVEL_ENTRY_WITH_NO_ALTERATION); // LCOV_EXCL_LINE
++kk;
game.newloc = T_HIGH(travel[kk]);
nextup = T_HIGH(travel[kk]);
} while
(game.newloc == scratchloc);
scratchloc = game.newloc;
(nextup == scratchloc);
scratchloc = nextup;
}
game.newloc = MOD(scratchloc, 1000);