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Improve documentation if the *most* obscure span of code.

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This commit is contained in:
Eric S. Raymond 2017-06-28 20:24:29 -04:00
parent 6150e3be1f
commit 7281c39807
2 changed files with 12 additions and 7 deletions
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16
main.c
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@ -625,20 +625,24 @@ static bool playermove(token_t verb, int motion)
for (;;) { /* L12 loop */
for (;;) {
game.newloc = scratchloc / 1000;
motion = MOD(game.newloc, 100);
long arg = MOD(game.newloc, 100);
if (!SPECIAL(game.newloc)) {
/* YAML N and [pct N] conditionals */
if (game.newloc <= 100) {
if (game.newloc == 0 || PCT(game.newloc))
break;
/* else fall through */
}
/* handles the YAML "with" clause */
if (TOTING(motion) || (game.newloc > 200 && AT(motion)))
/* YAML [with OBJ] clause */
if (TOTING(arg) || (game.newloc > 200 && AT(arg)))
break;
/* else fall through */
} else if (game.prop[motion] != game.newloc / 100 - 3)
/* else fall through to check [not OBJ STATE] */
} else if (game.prop[arg] != game.newloc / 100 - 3)
break;
do {
/* We arrive here on conditional failure.
* Skip to next non-matching destination */
do {
if (travel[kk].stop)
BUG(CONDITIONAL_TRAVEL_ENTRY_WITH_NO_ALTERATION); // LCOV_EXCL_LINE
++kk;