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author | rubidium <rubidium@openttd.org> | 2007-10-20 14:51:09 +0000 |
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committer | rubidium <rubidium@openttd.org> | 2007-10-20 14:51:09 +0000 |
commit | 8212088c03c0a0af451f734391699e5dab8d8608 (patch) | |
tree | 28fbe813d418b83e119aa615200f98b20ba520c8 /src/command.cpp | |
parent | 54369cba0f9d1cda2d40752eb337d153b3b6775f (diff) | |
download | openttd-8212088c03c0a0af451f734391699e5dab8d8608.tar.xz |
(svn r11312) -Codechange: implement a overflow safe integer and use that for money and don't misuses CommandCost to have a overflow safe integer. Based on a patch by Noldo.
Diffstat (limited to 'src/command.cpp')
-rw-r--r-- | src/command.cpp | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/src/command.cpp b/src/command.cpp index 4370f9b19..e2133fe4f 100644 --- a/src/command.cpp +++ b/src/command.cpp @@ -677,25 +677,13 @@ CommandCost CommandCost::AddCost(CommandCost ret) CommandCost CommandCost::AddCost(Money cost) { - /* Overflow protection */ - if (cost < 0 && (this->cost + cost) > this->cost) { - this->cost = INT64_MIN; - } else if (cost > 0 && (this->cost + cost) < this->cost) { - this->cost = INT64_MAX; - } else { - this->cost += cost; - } + this->cost += cost; return *this; } CommandCost CommandCost::MultiplyCost(int factor) { - /* Overflow protection */ - if (factor != 0 && (INT64_MAX / myabs(factor)) < myabs(this->cost)) { - this->cost = (this->cost < 0 == factor < 0) ? INT64_MAX : INT64_MIN; - } else { - this->cost *= factor; - } + this->cost *= factor; return *this; } |