ObjLexer::ObjLexer(std::string const& raw_object)
{
char ch;
int i = 0;
while (i < (int)raw_object.size())
{
ch = raw_object[i];
// v/vt/vn
if (ch == 'v')
{
Token::Type type;
if (raw_object[i + 1] == 't')
{
type = Token::Type::VERTEX_T;
}
else if (raw_object[i + 1] == 'n')
{
type = Token::Type::VERTEX_N;
}
else
{
type = Token::Type::VERTEX;
}
i += AddNewToken(type, i, raw_object);
}
// f
else if (ch == 'f')
{
i += AddNewToken(Token::Type::FACE, i, raw_object);
}
// comment or g (grouping which we ignore atm)
else if (ch == '#' || ch == 'g')
{
size_t size = raw_object.find('\n', i);
i += size - i;
}
// everything else becomes a literal
else if (isLiteral(ch))
{
i += AddNewToken(Token::Type::LITERAL, i, raw_object);
}
// whitespace, and eoln
else if (ch == ' ' || ch == '\n')
{
i++;
continue;
}
}
}
void CCmdParse::AddChar()
{
if (*m_pCurrent == '\0')
{ //check to see if we were in the middle of building something,
//otherwise quit.
if (strlen(m_Token) > 0)
AddNewToken();
State = e_end;
return;
}
if (State == e_start && (*m_pCurrent == '"'))
{ //we are handling a quoted string
State = e_quote;
Previous = e_start;
++m_pCurrent;
return;
}
if (State == e_start && ((*m_pCurrent != '"') && (!isspace(*m_pCurrent))) )
{ //we are handling a non quoted string
State = e_other;
Previous = e_start;
return;
}
if (State == e_start && (isspace(*m_pCurrent)))
{
State = e_space;
Previous = e_start;
return;
}
if (State == e_quote && (*m_pCurrent != '"'))
{ //add it to the token builder
m_Token[m_nIndex++] = *m_pCurrent++;
return;
}
if (State == e_quote && (*m_pCurrent == '"'))
{ //we found another quote.
if (*(m_pCurrent -1) == '"')
{ //look back and see if quotes are wrong
//path names must be separated by quotes!!!!
State = e_error;
return;
}
if( !isspace(*(m_pCurrent +1)) && (*(m_pCurrent +1) != '\0') )
{
//look ahead and make sure they delimeted the quoted argument
State = e_error;
return;
}
Previous = State;//not used
//set the state so we know what we last saw and can expect
State = e_end_quote;
//add the quoted string minus the quotes
AddNewToken();
return;
}
if (State == e_end_quote && (*m_pCurrent != '"'))
{ //we are expecting a space or a non quote
if(isspace(*m_pCurrent))
{
++m_pCurrent;
State = e_space;
Previous = e_end_quote;
}
else
{
State = e_other;
Previous = e_end_quote;
}
return;
}
if (State == e_end_quote && (*m_pCurrent == '"'))
{ //suscpicious
++m_pCurrent;
return;
}
if (State == e_other && ((!isspace(*m_pCurrent)) && (*m_pCurrent != '"')) )
{ //add it to the token builder
m_Token[m_nIndex++] = *m_pCurrent++;
return;
}
else if(State == e_other && (isspace(*m_pCurrent)) )
{ //add the non quoted token
AddNewToken();
Previous = e_other;
if ( isspace(*m_pCurrent) )
State = e_space;
else
State = e_start;
return;
}
else if(State == e_other && (*m_pCurrent == '"'))
{
State = e_error;
return;
}
if (State == e_space && (!isspace(*m_pCurrent) ) )
{
State = e_start;
Previous = e_space;
return;
}
if (State == e_space && (isspace(*m_pCurrent)) )
{ //eat up spaces.
while (isspace(*m_pCurrent))
++m_pCurrent;
return;
}
}
