From 4a01879911c5673612693531c4f8970c1644947b Mon Sep 17 00:00:00 2001
From: madmaxoft <github@xoft.cz>
Date: Sun, 19 Jan 2014 23:45:26 +0100
Subject: cLuaState can now check function params.

---
 src/Bindings/LuaState.cpp | 34 ++++++++++++++++++++++++++++++++++
 src/Bindings/LuaState.h   |  3 +++
 2 files changed, 37 insertions(+)

(limited to 'src/Bindings')

diff --git a/src/Bindings/LuaState.cpp b/src/Bindings/LuaState.cpp
index 00e62fcf6..bfee1d037 100644
--- a/src/Bindings/LuaState.cpp
+++ b/src/Bindings/LuaState.cpp
@@ -914,6 +914,40 @@ bool cLuaState::CheckParamString(int a_StartParam, int a_EndParam)
 
 
 
+bool cLuaState::CheckParamFunction(int a_StartParam, int a_EndParam)
+{
+	ASSERT(IsValid());
+	
+	if (a_EndParam < 0)
+	{
+		a_EndParam = a_StartParam;
+	}
+	
+	for (int i = a_StartParam; i <= a_EndParam; i++)
+	{
+		if (lua_isfunction(m_LuaState, i))
+		{
+			continue;
+		}
+		// Not the correct parameter
+		lua_Debug entry;
+		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
+		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
+		AString ErrMsg = Printf("Error in function '%s' parameter #%d. Function expected, got %s",
+			(entry.name != NULL) ? entry.name : "?", i, GetTypeText(i).c_str()
+		);
+		LogStackTrace();
+		return false;
+	}  // for i - Param
+	
+	// All params checked ok
+	return true;
+}
+
+
+
+
+
 bool cLuaState::CheckParamEnd(int a_Param)
 {
 	tolua_Error tolua_err;
diff --git a/src/Bindings/LuaState.h b/src/Bindings/LuaState.h
index 414e5e4b2..f8b67f5cd 100644
--- a/src/Bindings/LuaState.h
+++ b/src/Bindings/LuaState.h
@@ -815,6 +815,9 @@ public:
 	/// Returns true if the specified parameters on the stack are strings; also logs warning if not
 	bool CheckParamString(int a_StartParam, int a_EndParam = -1);
 	
+	/// Returns true if the specified parameters on the stack are functions; also logs warning if not
+	bool CheckParamFunction(int a_StartParam, int a_EndParam = -1);
+	
 	/// Returns true if the specified parameter on the stack is nil (indicating an end-of-parameters)
 	bool CheckParamEnd(int a_Param);
 	
-- 
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