/***************************************************************
Function: main
**************************************************************/
public static void main(
string[] arg
)
{
CLexGen lg;
if (arg.Length < 1)
{
System.Console.WriteLine("Usage: JLex.Main <filename>");
return;
}
/* Note: For debuging, it may be helpful to remove the try/catch
block and permit the Exception to propagate to the top level.
This gives more information. */
try
{
lg = new CLexGen(arg[0]);
lg.generate();
}
catch (System.Exception e)
{
System.Console.WriteLine(e.Message);
}
}
/***************************************************************
Function: CSpec
Description: Constructor.
**************************************************************/
public CSpec(
CLexGen lexGen
)
{
m_lexGen = lexGen;
/* Initialize regular expression token variables. */
m_current_token = CLexGen.EOS;
m_lexeme = '\0';
m_in_quote = false;
m_in_ccl = false;
/* Initialize hashtable for lexer states. */
m_states = new Hashtable();
m_states.Add("YYINITIAL",m_states.Count);
/* Initialize hashtable for lexical macros. */
m_macros = new Hashtable();
/* Initialize variables for lexer options. */
m_integer_type = false;
m_intwrap_type = false;
m_count_lines = false;
m_count_chars = false;
m_cup_compatible = false;
m_unix = true;
m_public = false;
m_yyeof = false;
m_ignorecase = false;
/* Initialize variables for JLex runtime options. */
m_verbose = true;
m_nfa_start = null;
m_nfa_states = new Vector();
m_dfa_states = new Vector();
m_dfa_sets = new Hashtable();
m_dtrans_vector = new Vector();
m_dtrans_ncols = CUtility.MAX_SEVEN_BIT + 1;
m_row_map = null;
m_col_map = null;
m_accept_vector = null;
m_anchor_array = null;
m_init_code = null;
m_init_read = 0;
m_init_throw_code = null;
m_init_throw_read = 0;
m_yylex_throw_code = null;
m_yylex_throw_read = 0;
m_class_code = null;
m_class_read = 0;
m_eof_code = null;
m_eof_read = 0;
m_eof_value_code = null;
m_eof_value_read = 0;
m_eof_throw_code = null;
m_eof_throw_read = 0;
m_state_dtrans = null;
m_state_rules = null;
}
/***************************************************************
Function: Set
Description: Sets CMakeNfa member variables.
**************************************************************/
private void Set(
CLexGen lexGen,
CSpec spec,
CInput input
)
{
if (CUtility.DEBUG)
{
CUtility.ASSERT(null != input);
CUtility.ASSERT(null != lexGen);
CUtility.ASSERT(null != spec);
}
m_input = input;
m_lexGen = lexGen;
m_spec = spec;
}
/***************************************************************
Function: thompson
Description: High level access function to module.
Deposits result in input CSpec.
**************************************************************/
public void thompson(
CLexGen lexGen,
CSpec spec,
CInput input
)
{
int i;
CNfa elem;
int size;
/* Set member variables. */
reset();
Set(lexGen,spec,input);
size = m_spec.m_states.Count;
m_spec.m_state_rules = new Vector[size];
for (i = 0; i < size; ++i)
{
m_spec.m_state_rules[i] = new Vector();
}
/* Initialize current token variable
and create nfa. */
/*m_spec.m_current_token = m_lexGen.EOS;
m_lexGen.advance();*/
m_spec.m_nfa_start = machine();
/* Set labels in created nfa machine. */
size = m_spec.m_nfa_states.size();
for (i = 0; i < size; ++i)
{
elem = (CNfa) m_spec.m_nfa_states.elementAt(i);
elem.m_label = i;
}
/* Debugging output. */
if (CUtility.DO_DEBUG)
{
m_lexGen.print_nfa();
}
if (m_spec.m_verbose)
{
System.Console.WriteLine("NFA comprised of "
+ (m_spec.m_nfa_states.Count + 1)
+ " states.");
}
reset();
}
/***************************************************************
Function: reset
Description: Resets CMakeNfa member variables.
**************************************************************/
private void reset(
)
{
m_input = null;
m_lexGen = null;
m_spec = null;
}
