private static List <Preprocessor.token> MatchArrayPostscript(TokenProvider tp)
{
List <Preprocessor.token> ret = new List <Preprocessor.token>();
Preprocessor.token t = tp.Current;
if (t.value == "[")
{
ret.Add(t);
t = tp.MoveNext();
if (t.type == Preprocessor.token.token_type.number)
{
ret.Add(t);
t = tp.MoveNext();
}
if (t.value != "]")
{
throw new Exception();
}
ret.Add(t);
t = tp.MoveNext();
}
return(ret);
}
internal static ParsedEntry ParseFile(TokenProvider tp)
{
ParsedEntry ret = new ParsedEntry {
Type = ParsedEntry.type.file, Tokens = tp.tokens
};
Preprocessor.token t = tp.Current;
while (t.type != Preprocessor.token.token_type.beyond_eof)
{
if (t.type == Preprocessor.token.token_type.comment)
{
t = tp.MoveNext();
continue;
}
List <Preprocessor.token> cur_tokens = new List <Preprocessor.token>();
ParsedEntry entry = new ParsedEntry {
Tokens = cur_tokens
};
if (t.value == "typedef")
{
cur_tokens.Add(t);
t = tp.MoveNext();
List <Preprocessor.token> typedef_to = MatchType(tp);
cur_tokens.AddRange(typedef_to);
t = tp.Current;
cur_tokens.Add(t);
string typedef_from = t.value;
t = tp.MoveNext();
if (t.value != ";")
{
throw new Exception();
}
typedefs.Add(typedef_from, typedef_to);
t = tp.MoveNext();
entry.Type = ParsedEntry.type.typedef;
}
else
{
// Parse type
List <Preprocessor.token> mtype = MatchType(tp);
if (mtype.Count == 0)
{
throw new Exception("Invalid type: " + tp.Current.value);
}
cur_tokens.AddRange(mtype);
// Read identifier
t = tp.Current;
if (t.type == Preprocessor.token.token_type.identifier)
{
cur_tokens.Add(t);
t = tp.MoveNext();
}
// See if we identify a function
if (t.value == "(")
{
// Function header
t = tp.MoveNext();
List <ParsedEntry> args = new List <ParsedEntry>();
while (t.value != ")")
{
List <Preprocessor.token> type = MatchType(tp);
cur_tokens.AddRange(type);
t = tp.Current;
if ((t.value != ")") && (t.value != ","))
{
type.Add(t);
cur_tokens.Add(t);
t = tp.MoveNext();
}
if (t.value == ")")
{
break;
}
if (t.value != ",")
{
throw new Exception();
}
args.Add(new ParsedEntry {
Type = ParsedEntry.type.variable_definition, Tokens = type
});
cur_tokens.Add(t);
t = tp.MoveNext();
}
entry.Children.AddRange(args);
cur_tokens.Add(t);
t = tp.MoveNext();
if (t.value == ";")
{
cur_tokens.Add(t);
t = tp.MoveNext();
entry.Type = ParsedEntry.type.function_declaration;
}
else if (t.value == "{")
{
entry.Type = ParsedEntry.type.function_definition;
ParseStatementBlock(tp, entry);
}
}
else if (t.value == ";")
{
entry.Type = ParsedEntry.type.variable_definition;
cur_tokens.Add(t);
t = tp.MoveNext();
}
else if (t.value == "=")
{
entry.Type = ParsedEntry.type.variable_definition;
cur_tokens.Add(t);
t = tp.MoveNext();
ParseExpression(tp, entry);
}
else
{
throw new Exception();
}
}
ret.Children.Add(entry);
}
return(ret);
}
static List <Preprocessor.token> MatchType(TokenProvider tp)
{
List <Preprocessor.token> ret = new List <Preprocessor.token>();
Preprocessor.token t = tp.Current;
while (true)
{
if (t.type == Preprocessor.token.token_type.comment)
{
t = tp.MoveNext();
}
else if ((t.value == "extern") || (t.value == "static") || (t.value == "const") || (t.value == "unsigned") ||
(t.value == "signed"))
{
ret.Add(t);
t = tp.MoveNext();
}
else if ((t.value == "int") || (t.value == "long") || (t.value == "char") ||
(t.value == "short") || (t.value == "float") || (t.value == "double") ||
(t.value == "void"))
{
ret.Add(t);
t = tp.MoveNext();
if (t.value == "*")
{
ret.Add(t);
t = tp.MoveNext();
}
if ((t.value != "long") && (t.value != "short") && (t.value != "int"))
{
return(ret);
}
}
else if (typedefs.ContainsKey(t.value))
{
ret.AddRange(typedefs[t.value]);
t = tp.MoveNext();
return(ret);
}
else if ((t.value == "struct") || (t.value == "union"))
{
ret.Add(t);
t = tp.MoveNext();
string struct_name = null;
if (t.value != "{")
{
struct_name = t.value;
ret.Add(t);
t = tp.MoveNext();
}
if (t.value == "{")
{
ret.Add(t);
t = tp.MoveNext();
// Read the struct definition
List <Preprocessor.token> struct_def = new List <Preprocessor.token>();
while (true)
{
List <Preprocessor.token> type = MatchType(tp);
if (type.Count == 0)
{
throw new Exception("Invalid type: " + tp.Current.value);
}
struct_def.AddRange(type);
ret.AddRange(type);
t = tp.Current;
if (t.type == Preprocessor.token.token_type.identifier)
{
struct_def.Add(t);
ret.Add(t);
t = tp.MoveNext();
}
List <Preprocessor.token> array = MatchArrayPostscript(tp);
struct_def.AddRange(array);
ret.AddRange(array);
t = tp.Current;
if (t.value != ";")
{
throw new Exception();
}
struct_def.Add(t);
ret.Add(t);
t = tp.MoveNext();
if (t.value == "}")
{
ret.Add(t);
break;
}
}
t = tp.MoveNext();
if (struct_name != null)
{
struct_defs.Add(struct_name, struct_def);
}
}
else if (struct_name == null)
{
throw new Exception("Invalid struct definition");
}
else if (!struct_defs.ContainsKey(struct_name))
{
throw new Exception("struct " + struct_name + " is not defined");
}
return(ret);
}
else
{
throw new Exception("Invalid type: " + t.value);
}
}
}
