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authorMattes D <github@xoft.cz>2016-08-14 16:26:31 +0200
committerGitHub <noreply@github.com>2016-08-14 16:26:31 +0200
commit0f51f7e35883936a64857a12ca5a97eaa1c9e190 (patch)
tree0992f490337ae8c2339348dfd03c54e82c8fbed9 /src/Bindings/LuaState.cpp
parentMerge pull request #3072 from cuberite/blockclumps (diff)
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Diffstat (limited to 'src/Bindings/LuaState.cpp')
-rw-r--r--src/Bindings/LuaState.cpp122
1 files changed, 110 insertions, 12 deletions
diff --git a/src/Bindings/LuaState.cpp b/src/Bindings/LuaState.cpp
index e6a94091e..fd29e8e34 100644
--- a/src/Bindings/LuaState.cpp
+++ b/src/Bindings/LuaState.cpp
@@ -265,6 +265,26 @@ bool cLuaState::cCallback::RefStack(cLuaState & a_LuaState, int a_StackPos)
////////////////////////////////////////////////////////////////////////////////
+// cLuaState::cOptionalCallback:
+
+bool cLuaState::cOptionalCallback::RefStack(cLuaState & a_LuaState, int a_StackPos)
+{
+ // If the stack pos is nil, make this an empty callback:
+ if (lua_isnil(a_LuaState, a_StackPos))
+ {
+ Clear();
+ return true;
+ }
+
+ // Use default cCallback implementation:
+ return Super::RefStack(a_LuaState, a_StackPos);
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
// cLuaState::cTableRef:
bool cLuaState::cTableRef::RefStack(cLuaState & a_LuaState, int a_StackPos)
@@ -283,6 +303,45 @@ bool cLuaState::cTableRef::RefStack(cLuaState & a_LuaState, int a_StackPos)
////////////////////////////////////////////////////////////////////////////////
+// cLuaState::cStackTable:
+
+cLuaState::cStackTable::cStackTable(cLuaState & a_LuaState, int a_StackPos):
+ m_LuaState(a_LuaState),
+ m_StackPos(a_StackPos)
+{
+ ASSERT(lua_istable(a_LuaState, a_StackPos));
+}
+
+
+
+
+
+void cLuaState::cStackTable::ForEachArrayElement(std::function<bool(cLuaState & a_LuaState, int a_Index)> a_ElementCallback) const
+{
+ auto numElements = luaL_getn(m_LuaState, m_StackPos);
+ #ifdef _DEBUG
+ auto stackTop = lua_gettop(m_LuaState);
+ #endif
+ for (int idx = 1; idx <= numElements; idx++)
+ {
+ // Push the idx-th element of the array onto stack top and call the callback:
+ lua_rawgeti(m_LuaState, m_StackPos, idx);
+ auto shouldAbort = a_ElementCallback(m_LuaState, idx);
+ ASSERT(lua_gettop(m_LuaState) == stackTop + 1); // The element callback must not change the Lua stack below the value
+ lua_pop(m_LuaState, 1);
+ if (shouldAbort)
+ {
+ // The callback wants to abort
+ return;
+ }
+ }
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
// cLuaState:
cLuaState::cLuaState(const AString & a_SubsystemName) :
@@ -1086,35 +1145,35 @@ bool cLuaState::GetStackValue(int a_StackPos, cCallbackPtr & a_Callback)
-bool cLuaState::GetStackValue(int a_StackPos, cCallbackSharedPtr & a_Callback)
+bool cLuaState::GetStackValue(int a_StackPos, cOptionalCallback & a_Callback)
{
- if (a_Callback == nullptr)
- {
- a_Callback = std::make_shared<cCallback>();
- }
- return a_Callback->RefStack(*this, a_StackPos);
+ return a_Callback.RefStack(*this, a_StackPos);
}
-bool cLuaState::GetStackValue(int a_StackPos, cTableRef & a_TableRef)
+bool cLuaState::GetStackValue(int a_StackPos, cOptionalCallbackPtr & a_Callback)
{
- return a_TableRef.RefStack(*this, a_StackPos);
+ if (a_Callback == nullptr)
+ {
+ a_Callback = cpp14::make_unique<cOptionalCallback>();
+ }
+ return a_Callback->RefStack(*this, a_StackPos);
}
-bool cLuaState::GetStackValue(int a_StackPos, cTableRefPtr & a_TableRef)
+bool cLuaState::GetStackValue(int a_StackPos, cCallbackSharedPtr & a_Callback)
{
- if (a_TableRef == nullptr)
+ if (a_Callback == nullptr)
{
- a_TableRef = cpp14::make_unique<cTableRef>();
+ a_Callback = std::make_shared<cCallback>();
}
- return a_TableRef->RefStack(*this, a_StackPos);
+ return a_Callback->RefStack(*this, a_StackPos);
}
@@ -1145,6 +1204,45 @@ bool cLuaState::GetStackValue(int a_StackPos, cRef & a_Ref)
+bool cLuaState::GetStackValue(int a_StackPos, cStackTablePtr & a_StackTable)
+{
+ // Only allow tables to be stored in a_StackTable:
+ if (!lua_istable(m_LuaState, a_StackPos))
+ {
+ return false;
+ }
+
+ // Assign the StackTable to the specified stack position:
+ a_StackTable = cpp14::make_unique<cStackTable>(*this, a_StackPos);
+ return true;
+}
+
+
+
+
+
+bool cLuaState::GetStackValue(int a_StackPos, cTableRef & a_TableRef)
+{
+ return a_TableRef.RefStack(*this, a_StackPos);
+}
+
+
+
+
+
+bool cLuaState::GetStackValue(int a_StackPos, cTableRefPtr & a_TableRef)
+{
+ if (a_TableRef == nullptr)
+ {
+ a_TableRef = cpp14::make_unique<cTableRef>();
+ }
+ return a_TableRef->RefStack(*this, a_StackPos);
+}
+
+
+
+
+
bool cLuaState::GetStackValue(int a_StackPos, cTrackedRef & a_Ref)
{
return a_Ref.RefStack(*this, a_StackPos);