bool CVBRHeader::CheckXING( CMPAFile* pMPAFile, DWORD& dwOffset )
{
// XING ID found?
if( !CheckID( pMPAFile, 'X', 'i', 'n', 'g', dwOffset) && !CheckID( pMPAFile, 'I', 'n', 'f', 'o', dwOffset) )
return false;
return true;
}
// currently not used
bool CVBRHeader::ExtractLAMETag( DWORD dwOffset )
{
// LAME ID found?
if( !CheckID( m_pMPAFile, 'L', 'A', 'M', 'E', dwOffset ) && !CheckID( m_pMPAFile, 'G', 'O', 'G', 'O', dwOffset ) )
return false;
return true;
}
DWORD XmlParser::ParseColor(char **buffer, int id)
{
DWORD color = 0;
char data[512];
CheckID(id);
if (m_Success)
{
if (GetXmlData(buffer, data, sizeof(data)))
{
if (strlen(data) == 6)
{
// Convert hex to decimal
char *endptr;
color = strtoul(data, &endptr, 16);
}
else
{
printf("Invalid XML color value \"%s\" = %s\n", m_Tag, data);
m_Success = false;
}
}
else
{
printf("Error parsing XML data: \"%s\"\n", m_Tag);
m_Success = false;
}
}
return (color);
}
double XmlParser::ParseDouble(char **buffer, int id, double min, double max, bool allow_minus_one)
{
double value = 0.0;
char data[512];
CheckID(id);
if (m_Success)
{
if (GetXmlData(buffer, data, sizeof(data)))
{
value = atof(data);
if (allow_minus_one && (value == -1))
{
// negative one is a legal value
}
else if ((value < min) || (value > max))
{
printf("Invalid XML value \"%s\" = %s (min=%g max=%g)\n", m_Tag, data, min, max);
m_Success = false;
}
}
else
{
printf("Error parsing XML data: \"%s\"\n", m_Tag);
m_Success = false;
}
}
return (value);
}
int XmlParser::ParseInt(char **buffer, int id, int min, int max)
{
int value = 0;
char data[512];
CheckID(id);
if (m_Success)
{
if (GetXmlData(buffer, data, sizeof(data)))
{
value = atoi(data);
if ((value < min) || (value > max))
{
printf("Invalid XML value \"%s\" = %s (min=%d max=%d)\n", m_Tag, data, min, max);
m_Success = false;
}
}
else
{
printf("Error parsing XML data: \"%s\"\n", m_Tag);
m_Success = false;
}
}
return (value);
}
bool CVBRHeader::CheckVBRI( CMPAFile* pMPAFile, DWORD& dwOffset )
{
// VBRI ID found?
if( !CheckID( pMPAFile, 'V', 'B', 'R', 'I', dwOffset ) )
return false;
return true;
}
char * XmlParser::ParseString(char **buffer, int id)
{
char data[512];
CheckID(id);
if (m_Success)
{
if (!GetXmlData(buffer, data, sizeof(data)))
{
printf("Error parsing XML data: \"%s\"\n", m_Tag);
m_Success = false;
}
}
return (DecodeXmlString(data));
}
bool GetAssignment(std::string line)
{
if (line.find(";") != string::npos)
{
//check for characters after the ;
std::string lineS = line.substr(line.find_first_of(";"), line.length() - line.find_first_of("="));
for (int i = 0; i < lineS.length(); i++)
{
if (CheckChar(lineS[i]))
{
error = "charaters after semicolon!";
return false;
}
}
line = line.substr(0, line.find_first_of(";"));
//
lineS = line.substr(0, line.find_first_of("="));
//check if line contains white space
if (lineS.find(" ") != string::npos)
{
int indexOfWhiteSpace = lineS.find_first_of(" ");
if (indexOfWhiteSpace == lineS.length() - 1)
lineS = lineS.substr(0, indexOfWhiteSpace);
else if (indexOfWhiteSpace == 0)
lineS = lineS.substr(1);
else
{
error = "incorrent space in id";
return false;
}
}
if (!CheckID(lineS))
return false;
if (!GetExpression(line.substr(line.find_first_of("=") + 1, (line.length() - line.find_first_of("=") - 1))))
return false;
return true;
}
error = "No semicolon in the assignment!";
return false;
}
enum VariableType GetExpressionType(TreeNode* currentNode, MethodSymbols* methodTable) {
enum VariableType temp1,temp2;
switch(currentNode->type) {
case TREE_OR :
return CheckOperatorBoolsOnly("||",currentNode,methodTable);
case TREE_AND :
return CheckOperatorBoolsOnly("&&",currentNode,methodTable);
case TREE_EQ :
return CheckOperatorComparison("==",currentNode,methodTable);
case TREE_NEQ :
return CheckOperatorComparison("!=",currentNode,methodTable);
case TREE_LT :
return CheckOperatorCompareIntsOnly("<",currentNode,methodTable);
case TREE_GT :
return CheckOperatorCompareIntsOnly(">",currentNode,methodTable);
case TREE_LEQ :
return CheckOperatorCompareIntsOnly("<=",currentNode,methodTable);
case TREE_GEQ :
return CheckOperatorCompareIntsOnly(">=",currentNode,methodTable);
case TREE_ADD :
return CheckOperatorIntsOnly("+",currentNode,methodTable);
case TREE_SUB :
return CheckOperatorIntsOnly("-",currentNode,methodTable);
case TREE_MUL :
return CheckOperatorIntsOnly("*",currentNode,methodTable);
case TREE_DIV :
return CheckOperatorIntsOnly("/",currentNode,methodTable);
case TREE_MOD :
return CheckOperatorIntsOnly("%",currentNode,methodTable);
case TREE_NOT :
if((temp1=GetExpressionType(currentNode->sons->node,methodTable))==VARIABLE_BOOL)
return VARIABLE_BOOL;
else {
PrintSemanticError("Operator %s cannot be applied to type %s\n","!",VarTypeToString(temp1));
return VARIABLE_INVALID;
}
case TREE_PLUS :
if((temp1=GetExpressionType(currentNode->sons->node,methodTable))==VARIABLE_INT)
return VARIABLE_INT;
else {
PrintSemanticError("Operator %s cannot be applied to type %s\n","+",VarTypeToString(temp1));
return VARIABLE_INVALID;
}
case TREE_MINUS :
if((temp1=GetExpressionType(currentNode->sons->node,methodTable))==VARIABLE_INT)
return VARIABLE_INT;
else {
PrintSemanticError("Operator %s cannot be applied to type %s\n","-",VarTypeToString(temp1));
return VARIABLE_INVALID;
}
case TREE_LENGTH :
temp1=GetExpressionType(currentNode->sons->node,methodTable);
switch (temp1) {
case VARIABLE_BOOLARRAY :
case VARIABLE_INTARRAY :
case VARIABLE_STRINGARRAY :
return VARIABLE_INT;
default :
PrintSemanticError("Operator %s cannot be applied to type %s\n",".length",VarTypeToString(temp1));
return VARIABLE_INVALID;
}
return VARIABLE_INT;
case TREE_LOADARRAY :
temp1=GetExpressionType(currentNode->sons->node,methodTable); /*look up variable type*/
temp2=GetExpressionType(currentNode->sons->next->node,methodTable); /*Look up indexer type*/
if (temp2!=VARIABLE_INT) {
/*indexer value is not an int*/
PrintSemanticError("Operator %s cannot be applied to types %s, %s\n","[",VarTypeToString(temp1),VarTypeToString(temp2));
return VARIABLE_INVALID;
}
/*Check if the indexed variable is a valid array type*/
switch (temp1) {
case VARIABLE_BOOLARRAY :
return VARIABLE_BOOL;
case VARIABLE_INTARRAY :
return VARIABLE_INT;
case VARIABLE_STRINGARRAY : /*Can't do anything with this particular array type*/
default :
/*operator [] being used in something not indexable*/
PrintSemanticError("Operator %s cannot be applied to types %s, %s\n","[",VarTypeToString(temp1),VarTypeToString(temp2));
return VARIABLE_INVALID;
}
case TREE_CALL :
return CheckCall(currentNode,methodTable);
case TREE_NEWINT :
temp1 = GetExpressionType(currentNode->sons->node,methodTable);
if (temp1!=VARIABLE_INT) { /*Size must be an int*/
PrintSemanticError("Operator %s cannot be applied to type %s\n","new int",VarTypeToString(temp1));
return VARIABLE_INVALID;
}
return VARIABLE_INTARRAY;
case TREE_NEWBOOL :
temp1 = GetExpressionType(currentNode->sons->node,methodTable);
if (temp1!=VARIABLE_INT) { /*Size must be an int*/
PrintSemanticError("Operator %s cannot be applied to type %s\n","new boolean",VarTypeToString(temp1));
return VARIABLE_INVALID;
}
return VARIABLE_BOOLARRAY;
case TREE_PARSEARGS :
temp1=GetExpressionType(currentNode->sons->node,methodTable); /*look up variable type*/
temp2=GetExpressionType(currentNode->sons->next->node,methodTable); /*Look up indexer type*/
if (temp2!=VARIABLE_INT) {
/*indexer value is not an int*/
PrintSemanticError("Operator %s cannot be applied to types %s, %s\n","Integer.parseInt",VarTypeToString(temp1),VarTypeToString(temp2));
return VARIABLE_INVALID;
}
switch (temp1) { /*parseArgs only takes string arrays*/
case VARIABLE_STRINGARRAY :
return VARIABLE_INT; /*Parseargs always returns an int since it's Integer.parseInt*/
break;
default :
/*operator [] being used in something not indexable*/
PrintSemanticError("Operator %s cannot be applied to types %s, %s\n","Integer.parseInt",VarTypeToString(temp1),VarTypeToString(temp2));
return VARIABLE_INVALID;
}
return VARIABLE_INVALID;
case TREE_ID :
return CheckID(currentNode,methodTable);
case TREE_INTLIT :
return CheckLitInt((char*)currentNode->args);
case TREE_BOOLLIT :
return CheckLitBool((char*)currentNode->args);
default :
return VARIABLE_INVALID;
}
}
bool GetExpression(std::string line)
{
bool op = false;
int parens = 0;
while (line.length() > 0)
{
//first count the parens
for (int i = 0; i < line.length(); i ++)
{
if (line[i] == '(')
{
parens++;
}
else if (line[i] == ')')
{
parens--;
}
}
if (parens != 0)
{
error = "parenthesis do not match";
return false;
}
while (line[0] == ' ' && line[0] != NULL)
{
if (line.length() == 1)
goto Finish;
else
line = line.substr(1);
}
if (line[0] == '(')
{
if (!op)
{
//first count the parens
for (int i = 0; i < line.length(); i ++)
{
if (line[i] == '(')
{
parens++;
}
else if (line[i] == ')')
{
parens--;
if (parens == 0)
{
if (!GetExpression(line.substr(1).substr(0, i - 1)))
return false;
line = line.substr(i + 1, line.length() - i);
op = true;
break;
}
}
}
}
else
{
error = "incorrect use of parenthesis";
return false;
}
}
else if (line.find(' ') != string::npos)
{
if (op)
{
if (!CheckOp(line.substr(0, line.find_first_of(' '))))
{
error = "invalid expression";
return false;
}
op = false;
line = line.substr(line.find_first_of(' '), line.length() - line.find_first_of(' '));
}
else
{
if (!CheckID(line.substr(0, line.find_first_of(' '))))
{
error = "invalid expression";
return false;
}
op = true;
line = line.substr(line.find_first_of(' '), line.length() - line.find_first_of(' '));
}
}
else
{
if (!op)
{
if (!CheckID(line))
{
error = "invalid expression";
return false;
}
op = true;
line = line.substr(line.length());
}
else
{
error = "cannot end expression in a op";
return false;
}
}
}
Finish:
return op;
}
/**********************************************************************************
*
* Friend Functions and Operator Overloading
* _________________________________________________________________________________
* This program will test the CheckID friend function, == operator, additional
* member function which added an integer to age, and the + operator to add
* a constant to a CS1CStudent's age
* _________________________________________________________________________________
* INPUTS:
* <none>
*
* OUTPUTS:
* This program will output information of the students
**********************************************************************************/
int main()
{
/******************************************************************************
* CONSTANTS
* ----------------------------------------------------------------------------
* LINE_LENGTH : The length of the line
*****************************************************************************/
const int LINE_LENGTH = 60;
int addedAge; //The years being added to the student's age
addedAge = 5;
//CS1C Student Pujols
CS1CStudent pujols("Alberto Pujols", 668899, 2496651234, 35, 'M', "Freshman",
3.3, 778899, true, 5, 12, 2016);
//CS1C Student Kershaw
CS1CStudent kershaw("Clayton Kershaw", 156789, 2485556543, 29, 'M',
"Sophomore", 2.5, 456789, false, 5, 11, 2015);
//Math Student Calculus
MathStudent calculus("Joe Calculus",668888, 2495551234, 23, 'm', "Freshman",
3.3, "1234 Main", "Laguna Niguel", "CA", 92677);
//OUTPUT - Class Headings
cout << PrintHeader("Elva Nguyen", 'a',
"Friend Functions and Operator Overloading", 8);
cout << setfill('-');
//1 - Test Friend Function CheckID
cout << "Test CheckID Friend Funtion" << endl << endl;
cout << "Calculus's ID: " << calculus.getID() << endl;
cout << "Pujols' ID:" << pujols.getID() << endl;
//Check ID of Pujols and Calculus
cout << (CheckID(calculus, pujols)? "Same": "Not the same") << endl << endl;
//Change Pujols' ID to Calculus' ID
cout << "Change Pujols' ID" << endl << endl;
pujols.setID(calculus.getID());
cout << "Calculus's ID: " << calculus.getID() << endl;
cout << "Pujols' ID:" << pujols.getID() << endl;
cout << (CheckID(calculus, pujols)? "Same": "Not the same") << endl;
cout << setw(LINE_LENGTH) << '-' << endl;
//2 - Test == operator of CS1CStudent
cout << "Test == Operator of CS1CStudent\n" << endl;
cout << "Kershaw's ID: " << kershaw.getID() << endl;
cout << "Pujols' ID:" << pujols.getID() << endl;
cout << (pujols == kershaw? "Same": "Not the same") << endl << endl << endl;
//Change Pujols' ID to Kershaw's ID
cout << "Change Pujols' ID\n" << endl;
pujols.setID(kershaw.getID());
cout << "Kershaw's ID: " << kershaw.getID() << endl;
cout << "Pujols' ID:" << pujols.getID() << endl;
cout << (pujols == kershaw? "Same": "Not the same") << endl;
cout << setw(LINE_LENGTH) << '-' << endl;
//3 - Test the additional member function which add the age
cout <<"Test the additional member function which added an integer to age\n\n";
cout << "Pujols' initial age: " << pujols.getAge() << endl;
pujols.ChangeAge(addedAge);
cout << addedAge << " is added to the student's age.\n";;
cout << "Pujols' current age: " << pujols.getAge() << endl;
cout << setw(LINE_LENGTH) << '-' << endl;
//4 - Test the + operator to add a constant to a CS1CStudent's age
cout << "Test the + operator to add a constant to a CS1CStudent's age\n\n";
cout << "Kershaw' initial age: " << kershaw.getAge() << endl;
kershaw = kershaw + addedAge;
cout << addedAge << " is added to the student's age.\n";;
cout << "Kershaw' current age: " << kershaw.getAge() << endl;
cout << setw(LINE_LENGTH) << '-' << endl;
return 0;
}