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assign3.cpp
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assign3.cpp
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#include "allNodes.h"
// using namespace std;
std::vector<symbolTable> globalSymbolTable;
/* returns the index with given func name*/
int returnIndexInTable(string funcName)
{
for (int i = 0; i < globalSymbolTable.size(); ++i)
{
if (globalSymbolTable[i].funcName == funcName)
return i;
}
return -1;
}
int returnIndexinVector(std::vector<allVariables> &v,int scope,string varName)
{
int Size = v.size();
for (int i = 0; i < Size; ++i)
{
if (v[i].var_name == varName && v[i].scope == scope)
{
return i;
}
}
return -1;
}
bool ifVarExistOrNot(int indexinGlobalTable,int scope,string varName)
{
int Param = returnIndexinVector(globalSymbolTable[indexinGlobalTable].paramListPtr,scope,varName);
int Localvar = returnIndexinVector(globalSymbolTable[indexinGlobalTable].localVariables,scope,varName);
if(Param >= 0) return true;
if(Localvar >= 0) return true;
return false;
}
/*Normal Symbol Table*/
// void insertData(node* incomingIdentifier,int scope,string type = NULL)
// {
// // cout <<"inserting..." <<incomingIdentifier->nodeValue << std::endl;
// allVariables newData;
// newData.var_name = incomingIdentifier->nodeValue;
// newData.scope = scope;
// newData.varType = type;
// globalSymbolTable.push_back(newData);
// }
/* Dummy Insertion */
void dummyInsert()
{
symbolTable firstEntry;
firstEntry.funcName = "global";
globalSymbolTable.push_back(firstEntry);
}
/* function symbol table */
void insertData(string funcName, string funcReturnType, int numParams = 0)
{
if (globalSymbolTable.size()==0)
dummyInsert();
symbolTable newEntry;
newEntry.funcName = funcName;
newEntry.funcReturnType = funcReturnType;
newEntry.numParams = numParams;
globalSymbolTable.push_back(newEntry);
}
/* var or params */
void insertData(string varName,string funcName,string varType,string paramOrVar,int scope )
{
if (globalSymbolTable.size()==0)
dummyInsert();
int indexwithFuncname = returnIndexInTable(funcName);
if (indexwithFuncname >= 0)
{
allVariables newData;
newData.var_name = varName;
newData.varType = varType;
newData.paramOrVar = paramOrVar;
newData.scope = scope;
if (paramOrVar == "params")
globalSymbolTable[indexwithFuncname].paramListPtr.push_back(newData);
else
globalSymbolTable[indexwithFuncname].localVariables.push_back(newData);
}
}
bool lookup(string varName,string funcName, int scope)
{
// if (funcName != "global")
// {
// int indexinFunction = returnIndexInTable(funcName);
// if(indexinFunction >= 0)
// {
// bool varPresent = ifVarExistOrNot(indexinFunction,scope,varName);
// if(varPresent) return true;
// }
// }
// funcName = "global";
int indexinGlobal = returnIndexInTable(funcName);
if(indexinGlobal >= 0)
{
bool varPresent = ifVarExistOrNot(indexinGlobal,scope,varName);
if(varPresent) return true;
}
return false;
}
bool lookup(string funcName)
{
int indexinGlobal = returnIndexInTable(funcName);
if(indexinGlobal >= 0 ) return true;
return false;
}
void PrintVector(std::vector<allVariables> &v)
{
for (int i = 0; i < v.size(); ++i)
cout << v[i].var_name << "\t" << v[i].varType << "\t" << v[i].scope << std::endl;
}
void PrintSymbolTable()
{
for(int i=0;i<globalSymbolTable.size();i++)
{
cout<<"Func\t\tReturnType\t\tNumParam\n";
cout<<globalSymbolTable[i].funcName << "\t\t" << globalSymbolTable[i].funcReturnType;
cout << "\t\t\t" << globalSymbolTable[i].numParams << std::endl;
if (globalSymbolTable[i].funcName != "global")
{
cout<<"\nPARAMETERS LIST:\n";
cout<<"Name\tType\tScope\n";
PrintVector(globalSymbolTable[i].paramListPtr);
}
cout<<"\nVARIABLES LIST:\n";
cout<<"Name\tType\tScope\n";
PrintVector(globalSymbolTable[i].localVariables);
string line="-------------------------------";
cout<<line+line+line<<std::endl;
}
}
node* addNode(string type, node* a=NULL, node* b=NULL, node* c=NULL, node* d=NULL, node* e=NULL, node* f=NULL, node* g=NULL, node* h=NULL, node* i=NULL, string val="")
{
// static int no = 1;
node *newNode;
newNode = new node();
newNode->children[0] = a;
newNode->children[1] = b;
newNode->children[2] = c;
newNode->children[3] = d;
newNode->children[4] = e;
newNode->children[5] = f;
newNode->children[6] = g;
newNode->children[7] = h;
newNode->children[8] = i;
newNode->children[9] = NULL;
newNode->nodeName=type;
// newNode->node_no = no * 10;
newNode->nodeValue=val;
// no++;
// newNode->line_no=line;
return newNode;
}
/*Type of identifier*/
string getTypeHelper(node *currentNode,string funcName,int scope)
{
string varName = currentNode->nodeValue;
// cout<<varName<<" inside\n";
int index=returnIndexInTable(funcName);
// if(index == -1) cout<<"WRONG\n";
if (index >= 0)
{
int Param = returnIndexinVector(globalSymbolTable[index].paramListPtr,scope,varName);
// cout<<"Param: "<<Param<<std::endl;
if (Param >= 0)
return globalSymbolTable[index].paramListPtr[Param].varType;
int Localvar = returnIndexinVector(globalSymbolTable[index].localVariables,scope,varName);
// cout<<"Localvar: "<<Localvar<<std::endl;
// cout<<"Type: "<<globalSymbolTable[index].localVariables[Localvar].varType<<std::endl;
if (Localvar >= 0)
return globalSymbolTable[index].localVariables[Localvar].varType;
}
index=returnIndexInTable("global");
if (index >= 0)
{
int Param = returnIndexinVector(globalSymbolTable[index].paramListPtr,scope,varName);
if (Param >= 0)
return globalSymbolTable[index].paramListPtr[Param].varType;
int Localvar = returnIndexinVector(globalSymbolTable[index].localVariables,scope,varName);
if (Localvar >= 0)
return globalSymbolTable[index].localVariables[Localvar].varType;
}
return "";
}
string getType(node *currentNode,string funcName,int scope)
{
while(scope>=0)
{
string temp = getTypeHelper(currentNode, funcName,scope);
if (temp != "")
{
return temp;
}
scope--;
}
return "";
}
void updateSymboltable(string funcName,std::vector<allVariables> v)
{
int index = returnIndexInTable(funcName);
if(index >= 0 )
{
globalSymbolTable[index].paramListPtr = v;
globalSymbolTable[index].numParams = v.size();
}
}
node* getLeafNodeType(node *Node)
{
while(Node->children[0])
{
Node = Node->children[0];
}
return Node;
}
int varIndex=1;
void GenerateCode(node * head)
{
if((!head ) || (!head->children[0])) return;
GenerateCode(head->children[0]);
if (head->children[1])
{
GenerateCode(head->children[1]);
}
cout<<head->threeAddrName << " = " << head->children[0]->threeAddrName ;
if (head->children[1])
{
cout<< " " << head->Operator << " "<<head->children[1]->threeAddrName;
}
cout<<std::endl;
}