public void ReadSectionOpen (Tokenizer t)
{
Token tok = t.Read ();
if (tok == null)
throw new UnexpectedEndOfFileException (t, "{");
if (tok.Text != "{")
throw new UnexpectedTokenException (tok, "{");
}
public Keymap ReadMap (Tokenizer t)
{
Keymap map = new Keymap ();
Token tok;
ReadSectionOpen (t);
do {
int scancode, key;
tok = t.Read ();
if (tok == null)
throw new UnexpectedEndOfFileException (t, "}");
if (tok.Text == "}")
break;
else
t.PutBack (tok);
scancode = ReadInt (t);
key = ReadEqChar (t);
ReadEnd (t);
map.Entries [scancode] = key;
} while (true);
return map;
}
public int ReadEqChar (Tokenizer t)
{
Token tok;
ReadEq (t);
tok = t.Read ();
if (tok.Type == TokenType.StringQuoteStart) {
string text;
t.PutBack (tok);
text = ReadString (t);
text = text.Replace ("\\b", "\b");
text = text.Replace ("\\t", "\t");
text = text.Replace ("\\n", "\n");
text = text.Replace ("\\'", "'");
text = text.Replace ("\\\"", "\"");
text = text.Replace ("\\\\", "\\");
if (text.Length != 1)
throw new Exception (tok.PositionString + ": Expected one character, not string '" + text + "'");
return text [0];
} else if (tok.Text == "@") {
tok = t.Read ();
if (tok.Type != TokenType.Alphanumeric)
throw new UnexpectedTokenException (tok, "<special-key>");
return (int) Enum.Parse (typeof (SpecialKeys), tok.Text);
} else {
t.PutBack (tok);
return ReadInt (t);
}
}
public string ReadString (Tokenizer t)
{
Token tok = t.Read ();
string text;
if (tok == null)
throw new UnexpectedEndOfFileException (t, "<quote-start>");
if (tok.Type != TokenType.StringQuoteStart)
throw new UnexpectedTokenException (tok, "<quote-start>");
tok = t.Read ();
if (tok == null)
throw new UnexpectedEndOfFileException (t, "<string>");
if (tok.Type != TokenType.String)
throw new UnexpectedTokenException (tok, "<string>");
text = tok.Text;
tok = t.Read ();
if (tok == null)
throw new UnexpectedEndOfFileException (t, "<quote-end>");
if (tok.Type != TokenType.StringQuoteEnd)
throw new UnexpectedTokenException (tok, "<quote-end>");
return text;
}
public int ReadInt (Tokenizer t)
{
bool neg = false;
int num;
Token tok = t.Read ();
if (tok.Text == "-") {
neg = true;
tok = t.Read ();
}
if (tok.Text == "0x") {
string tempNum = "";
do {
tok = t.Read ();
if (tok.Type == TokenType.Alphanumeric)
tempNum += tok.Text;
else
break;
} while (true);
try {
num = int.Parse (tempNum, NumberStyles.HexNumber);
} catch (FormatException) {
throw new UnexpectedTokenException (tok, "<hex>");
}
} else if (tok.Type == TokenType.Alphanumeric) {
try {
num = int.Parse (tok.Text);
} catch (FormatException) {
throw new UnexpectedTokenException (tok, "<dec>");
}
} else
throw new UnexpectedTokenException (tok, "<number>");
if (neg)
return -num;
else
return num;
}
public bool ParseStatement (Tokenizer t)
{
bool err = false;
Token token = t.Read ();
if (token == null)
return false;
if (token.Type == TokenType.Alphanumeric) {
switch (token.Text) {
case "keymask":
keymask = ReadEqInt (t);
break;
case "statebit":
statebit = ReadEqInt (t);
break;
case "default":
Console.WriteLine ("Parsing `default' keymap...");
defaultMap = ReadMap (t);
break;
case "shifted":
Console.WriteLine ("Parsing `shifted' keymap...");
shiftedMap = ReadMap (t);
break;
default:
err = true;
break;
}
} else
err = true;
if (err)
throw new UnexpectedTokenException (token, "<unknown>");
return true;
}
public int Parse (string file)
{
string content;
Tokenizer t;
int errors = 0;
int line, col;
if (file == null)
throw new ArgumentNullException ("file");
using (StreamReader sr = new StreamReader (file))
content = sr.ReadToEnd ();
t = new Tokenizer (content, true);
t.CommentTokenPairs = new string [] {
"//", "\n",
"/*", "*/",
};
t.QuoteTokenPairs = new string [] { "'", "'" };
t.SpecialTokens = new string [] { "0x" };
while (true) {
bool failed = false;
try {
if (!ParseStatement (t))
break;
} catch (UnexpectedTokenException ute) {
failed = true;
Console.Error.WriteLine (
"Unexpected token '{0}' on line {1}, col {2} (wanted '{3}')",
ute.Token.Text, ute.Token.Line, ute.Token.Column,
ute.ExpectedToken);
} catch (UnexpectedEndOfFileException ueof) {
failed = true;
ueof.Tokenizer.GetLineInfo (out line, out col);
Console.Error.WriteLine (
"Unexpected end of file at line {0}, col {1}; expected `{2}'",
line, col, ueof.ExpectedToken);
return 2;
}
if (failed) {
Token tk;
++errors;
if (errors >= MaxErrors)
break;
while ((tk = t.Read ()) != null) {
if (tk.Text == ";")
break;
}
}
}
if (errors > 0)
return 1;
return 0;
}