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(svn r2647) Fix: [ntp] Fix assertion error introduced in r2635

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ludde 2005-07-20 09:31:46 +00:00
parent b8b14ac6c8
commit 26c8bdde43
1 changed files with 9 additions and 13 deletions
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22
pathfind.c
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@ -695,7 +695,6 @@ callback_and_continue:
assert(si.track <= 13);
direction = _tpf_new_direction[si.track];
assert(direction <= 3);
start_at:
// If the tile is the entry tile of a tunnel, and we're not going out of the tunnel,
@ -754,19 +753,19 @@ start_at:
}
// Regular rail tile, determine which tracks exist.
bits = _m[tile].m5 & 0x3F;
if (bits == 0)
break; // None at all?
bits = _m[tile].m5 & _bits_mask[direction];
// Make sure that the tile contains exactly ONE track
if (KILL_FIRST_BIT(bits) != 0) {
// It contained many tracks,
// but first, mask out the tracks that are not reachable
bits &= _bits_mask[direction];
// The tile has no reachable tracks, or
// does the tile contain more than one track?
if (bits == 0 || KILL_FIRST_BIT(_m[tile].m5 & 0x3F) != 0)
break;
}
// If we reach here, the tile has exactly one track, and this
// track is reachable.
track = _new_track[FIND_FIRST_BIT(bits)][direction];
assert(track != 0xff);
si.cur_length += _length_of_track[track];
// Check if this rail is an upwards slope. If it is, then add a penalty.
@ -818,7 +817,6 @@ start_at:
// continue with the next track
direction = _tpf_new_direction[track];
assert(direction <= 3);
// safety check if we're running around chasing our tail... (infinite loop)
if (tile == tile_org) {
@ -856,9 +854,7 @@ start_at:
si.depth++;
si.tile = tile;
do {
assert(direction <= 3);
si.track = _new_track[FIND_FIRST_BIT(bits)][direction];
assert(si.track <= 13);
si.priority = si.cur_length + estimation;
// out of stack items, bail out?