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Fix: [Script] ScriptBase::Rand() return value was between -MIN(int32) and MAX(int32) (#10443)

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Also ensure the parameters for ScriptBase::RandRange() and ScriptBase::Chance() are in [0-MAX(uint32)] range
This commit is contained in:
Loïc Guilloux
2023-02-10 19:55:59 +01:00
committed by GitHub
parent 7bd475b86c
commit 6b99b6672e
3 changed files with 96 additions and 87 deletions
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15
src/script/api/script_base.cpp
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@@ -13,33 +13,36 @@
#include "../../safeguards.h"
/* static */ uint32 ScriptBase::Rand()
/* static */ SQInteger ScriptBase::Rand()
{
return ScriptObject::GetRandomizer().Next();
}
/* static */ uint32 ScriptBase::RandItem(int unused_param)
/* static */ SQInteger ScriptBase::RandItem(SQInteger unused_param)
{
return ScriptBase::Rand();
}
/* static */ uint ScriptBase::RandRange(uint max)
/* static */ SQInteger ScriptBase::RandRange(SQInteger max)
{
max = Clamp<SQInteger>(max, 0, UINT32_MAX);
return ScriptObject::GetRandomizer().Next(max);
}
/* static */ uint32 ScriptBase::RandRangeItem(int unused_param, uint max)
/* static */ SQInteger ScriptBase::RandRangeItem(SQInteger unused_param, SQInteger max)
{
return ScriptBase::RandRange(max);
}
/* static */ bool ScriptBase::Chance(uint out, uint max)
/* static */ bool ScriptBase::Chance(SQInteger out, SQInteger max)
{
out = Clamp<SQInteger>(out, 0, UINT32_MAX);
max = Clamp<SQInteger>(max, 0, UINT32_MAX);
EnforcePrecondition(false, out <= max);
return ScriptBase::RandRange(max) < out;
}
/* static */ bool ScriptBase::ChanceItem(int unused_param, uint out, uint max)
/* static */ bool ScriptBase::ChanceItem(SQInteger unused_param, SQInteger out, SQInteger max)
{
return ScriptBase::Chance(out, max);
}