/***************************************************************
* Function: CodeParser::parseCellArrayExpr()
* Purpose : Parse the XML code of a cell array expression
* Initial : Maxime Chevalier-Boisvert on February 23, 2009
****************************************************************
Revisions and bug fixes:
*/
Expression* CodeParser::parseCellArrayExpr(const XML::Element* pElement)
{
// Declare a vector to store the rows
CellArrayExpr::RowVector rowVector;
// For each child element
for (size_t i = 0; i < pElement->getNumChildren(); ++i)
{
// Declare a row to store elements
CellArrayExpr::Row row;
// Get a reference to this child element
XML::Element* pRowElem = pElement->getChildElement(i);
// If this is not a row element, throw an exception
if (pRowElem->getName() != "Row")
throw XML::ParseError("Invalid element found in cell array expression", pRowElem->getTextPos());
// For each expression in this row
for (size_t j = 0; j < pRowElem->getNumChildren(); ++j)
{
// Parse the expression and add it to the row
row.push_back(parseExpression(pRowElem->getChildElement(j)));
}
// Add the row to the vector
rowVector.push_back(row);
}
// Create and return the cell array expression
return new CellArrayExpr(rowVector);
}
/***************************************************************
* Function: CodeParser::parseAssignStmt()
* Purpose : Parse the XML code of an assignment statement
* Initial : Maxime Chevalier-Boisvert on November 5, 2008
****************************************************************
Revisions and bug fixes:
*/
Statement* CodeParser::parseAssignStmt(const XML::Element* pElement)
{
// Get the element corresponding to the left-expression
XML::Element* pLeftElem = pElement->getChildElement(0);
// Create a vector to store the left expressions
AssignStmt::ExprVector leftExprs;
// If the left expression is a matrix expression
if (pLeftElem->getName() == "MatrixExpr")
{
// If the number of rows is not 1, throw an exception
if (pLeftElem->getNumChildren() != 1)
throw XML::ParseError("invalid matrix expression on assignment lhs");
// Get the row element
XML::Element* pRowElem = pLeftElem->getChildElement(0);
// For each left expression element
for (size_t i = 0; i < pRowElem->getNumChildren(); ++i)
{
// Get the child element for this expression
XML::Element* pExprElem = pRowElem->getChildElement(i);
// Parse this left-expression
leftExprs.push_back(parseExpression(pExprElem));
}
}
else
{
// Parse the left expression directly
leftExprs.push_back(parseExpression(pLeftElem));
}
// Parse the right expression
Expression* pRightExpr = parseExpression(pElement->getChildElement(1));
// Get the output suppression flag
bool suppressOut = pElement->getBoolAttrib("outputSuppressed");
// Create and return the new assignment statement object
return new AssignStmt(leftExprs, pRightExpr, suppressOut);
}
/***************************************************************
* Function: CodeParser::parseFunction()
* Purpose : Parse the XML code of a function
* Initial : Maxime Chevalier-Boisvert on November 3, 2008
****************************************************************
Revisions and bug fixes:
*/
ProgFunction* CodeParser::parseFunction(const XML::Element* pElement)
{
// Get the function name
std::string funcName = pElement->getStringAttrib("name");
// Declare a pointer for the sequence statement
StmtSequence* pSequenceStmt = NULL;
// Declare vectors for the input and output parameters
ProgFunction::ParamVector inParams;
ProgFunction::ParamVector outParams;
// Declare a vector for the nested function list
ProgFunction::FuncVector nestedFuncs;
// For each child element
for (size_t i = 0; i < pElement->getNumChildren(); ++i)
{
// Get a pointer to this element
XML::Element* pFuncElement = pElement->getChildElement(i);
// If this is a symbol table
if (pFuncElement->getName() == "Symboltable")
{
// Ignore for now
}
// If this is a parameter declaration list
else if (pFuncElement->getName() == "ParamDeclList")
{
// Ignore for now
}
// If this is an input parameter list
else if (pFuncElement->getName() == "InputParamList")
{
// For each child element
for (size_t i = 0; i < pFuncElement->getNumChildren(); ++i)
{
// Get the parameter name
const std::string& paramName = pFuncElement->getChildElement(i)->getStringAttrib("nameId");
// Add the parameter to the list
inParams.push_back(SymbolExpr::getSymbol(paramName));
}
}
// If this is an output parameter list
else if (pFuncElement->getName() == "OutputParamList")
{
// For each child element
for (size_t i = 0; i < pFuncElement->getNumChildren(); ++i)
{
// Get the parameter name
const std::string& paramName = pFuncElement->getChildElement(i)->getStringAttrib("nameId");
// Add the parameter to the list
outParams.push_back(SymbolExpr::getSymbol(paramName));
}
}
// If this is a nested function list
else if (pFuncElement->getName() == "NestedFunctionList")
{
// For each child element
for (size_t i = 0; i < pFuncElement->getNumChildren(); ++i)
{
// Parse this function declaration
ProgFunction* pFunction = parseFunction(pFuncElement->getChildElement(i));
// Add the nested function to the list
nestedFuncs.push_back(pFunction);
}
}
// If this is the statement list
else if (pFuncElement->getName() == "StmtList")
{
// If the statement list was already encountered, throw an exception
if (pSequenceStmt != NULL)
throw XML::ParseError("Duplicate statement list", pElement->getTextPos());
// Parse the statement list
pSequenceStmt = parseStmtList(pFuncElement);
}
// Otherwise
else
{
// This is an invalid element type, throw an exception
throw XML::ParseError("Invalid element type in script: \"" + pFuncElement->getName() + "\"", pFuncElement->getTextPos());
}
}
// If the statement list is missing, throw an exception
if (pSequenceStmt == NULL)
throw XML::ParseError("Missing statement list", pElement->getTextPos());
// Create a new program function object
ProgFunction* pNewFunc = new ProgFunction(
funcName,
inParams,
outParams,
nestedFuncs,
pSequenceStmt
);
// For each nested function
for (ProgFunction::FuncVector::iterator nestItr = nestedFuncs.begin(); nestItr != nestedFuncs.end(); ++nestItr)
{
// Set the parent pointer to the newly created function object
(*nestItr)->setParent(pNewFunc);
}
// Return the new program function object
return pNewFunc;
}