// The first thing it get will be the key value
KeyValue *SKS::GetKeyValue(Position &pos)
{
// Creates the key value to be sent back
KeyValue *val = new KeyValue();
// Position should be located one character after the colon
val->SetName(GetName(pos));
// Gets rid of leading whitespace
while(isspace(m_fileContents[pos.pos]))
Next(pos);
// One reaches first character determine if a string or some sort of real number
if(m_fileContents[pos.pos] == '"')
{
// move position to the first value of the string
Next(pos);
// Creates the string that will holst the value
char * string = new char [MAX_STATEMENT];
// loop until the end of the string
int stringPos = 0;
while(m_fileContents[pos.pos] != '"')
{
// One thing to note is that the contents of a string
// value don't allow comments
// Inserts any escape characters
if(m_fileContents[pos.pos] == '\\')
{
Next(pos, false);
if(m_fileContents[pos.pos] == '"') // Quotes
string[stringPos] = m_fileContents[pos.pos];
else if(m_fileContents[pos.pos] == '\'') // Quote
string[stringPos] = m_fileContents[pos.pos];
else if(m_fileContents[pos.pos] == '\\')
string[stringPos] = m_fileContents[pos.pos];
else if(m_fileContents[pos.pos] == 'n') // Newline
string[stringPos] = '\n';
else
{
cerr << "Unknown escape character \'" <<
m_fileContents[pos.pos] << "' Line: " << pos.line << endl;
// Just put the character after the backslash
// in anyways
string[stringPos] = m_fileContents[pos.pos];
}
// Increments their position
stringPos++;
Next(pos, false);
}
else
{
string[stringPos] = m_fileContents[pos.pos];
stringPos++;
Next(pos,false);
}
}
// Adds null terminator to end of string
string[stringPos] = NULL;
Next(pos); // Advances to the character after the ending quotes
// Tells the key value what it is holding
val->SetKeyValueType(TYPE_STRING);
val->SetString(string);
}
else if(isdigit(m_fileContents[pos.pos]) || m_fileContents[pos.pos] == '-')
{
int integer = 0, fraction = 0;
// string big enough to hold an 32 bit integer
char num[11];
bool isNegitive = false;
if(m_fileContents[pos.pos] == '-')
{
// Tells that the number is negitive
isNegitive = true;
//Advanes to the actual first number
Next(pos);
//Gets rid of any spaces that might be inbetween the negitive sign
// and the start of the number
while(isspace(m_fileContents[pos.pos]))
Next(pos);
}
// Read until a space is hit or a . is hit for a real number or the semi colon
int i = 0;
while(isdigit(m_fileContents[pos.pos]))
{
num[i++] = m_fileContents[pos.pos];
Next(pos);
if(i >= 10) // Bigger number then the 2 billion of a 4 byte integer
{
cerr << "Integer Overflow. Line: " << pos.line << endl;
break;
}
}
// Puts null terminator at the end of the string
num[i] = 0;
// figures out the integer value
integer = isNegitive ? -atoi(num) : atoi(num);
// if there is a fraction part to the number
if(m_fileContents[pos.pos] == '.')
{
Next(pos);
i = 0;
while(isdigit(m_fileContents[pos.pos]))
{
num[i++] = m_fileContents[pos.pos];
Next(pos);
if(i >= 10) // Bigger number then the 2 billion of a 4 byte integer
{
// Prints error message
cerr << "Integer Overflow. Line: " << pos.line << endl;
// Advances the position past the rest of the number
while(isdigit(m_fileContents[pos.pos]))
Next(pos);
break;
}
}
// add null termintaor to string
num[i] = 0;
// figures out the fractal part
fraction = atoi(num);
//Tells the key value what it is holding
val->SetKeyValueType(TYPE_REAL);
if(isNegitive)
val->SetReal(integer - fraction / (float)pow((double)10, (double)strlen(num)));
else
val->SetReal(integer + fraction / (float)pow((double)10, (double)strlen(num)));
}
else
{
// Tells the key value what it is holding
val->SetKeyValueType(TYPE_INTEGER);
// Update position to after the
val->SetInteger(integer);
}
}
return val;
}
