Thread-safe way to check for presence of references in formula tokens.

Change-Id: I995668d1e183dc0dae4f354889bc13053e858723

formula/source/core/api/token.cxx

@@ -130,6 +130,22 @@ bool FormulaToken::IsExternalRef() const
     return bRet;
 }
 
+bool FormulaToken::IsRef() const
+{
+    switch (eType)
+    {
+        case svSingleRef:
+        case svDoubleRef:
+        case svExternalSingleRef:
+        case svExternalDoubleRef:
+            return true;
+        default:
+            ;
+    }
+
+    return false;
+}
+
 bool FormulaToken::operator==( const FormulaToken& rToken ) const
 {
     // don't compare reference count!
@@ -538,6 +554,17 @@ FormulaToken* FormulaTokenArray::PeekPrevNoSpaces()
         return NULL;
 }
 
+bool FormulaTokenArray::HasReferences() const
+{
+    for (sal_uInt16 i = 0; i < nLen; ++i)
+    {
+        if (pCode[i]->IsRef())
+            return true;
+    }
+
+    return false;
+}
+
 bool FormulaTokenArray::HasExternalRef() const
 {
     for ( sal_uInt16 j=0; j < nLen; j++ )

include/formula/token.hxx

@@ -106,7 +106,10 @@ public:
     inline  void                Delete()                { delete this; }
     inline  StackVar            GetType() const         { return eType; }
             bool                IsFunction() const; // pure functions, no operators
-            bool                IsExternalRef() const;
+
+    bool IsExternalRef() const;
+    bool IsRef() const;
+
             sal_uInt8           GetParamCount() const;
 
     inline void IncRef() const

include/formula/tokenarray.hxx

@@ -116,6 +116,8 @@ public:
     FormulaToken* LastRPN() { nIndex = nRPN; return PrevRPN(); }
     FormulaToken* PrevRPN();
 
+    bool HasReferences() const;
+
     bool    HasExternalRef() const;
     bool    HasOpCode( OpCode ) const;
     bool    HasOpCodeRPN( OpCode ) const;

sc/source/core/tool/rangenam.cxx

@@ -518,8 +518,7 @@ sal_uInt16 ScRangeData::GetErrCode() const
 
 bool ScRangeData::HasReferences() const
 {
-    pCode->Reset();
-    return pCode->GetNextReference() != NULL;
+    return pCode->HasReferences();
 }
 
 sal_uInt32 ScRangeData::GetUnoType() const