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-rw-r--r--languages/cpp/debugger/mi/miparser.cpp345
1 files changed, 345 insertions, 0 deletions
diff --git a/languages/cpp/debugger/mi/miparser.cpp b/languages/cpp/debugger/mi/miparser.cpp
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+/***************************************************************************
+ * Copyright (C) 2004 by Roberto Raggi *
+ * roberto@kdevelop.org *
+ * Copyright (C) 2005-2006 by Vladimir Prus *
+ * ghost@cs.msu.su *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU Library General Public License as *
+ * published by the Free Software Foundation; either version 2 of the *
+ * License, or (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Library General Public *
+ * License along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+#include "miparser.h"
+#include "tokens.h"
+#include <memory>
+
+using namespace GDBMI;
+
+#define MATCH(tok) \
+ do { \
+ if (lex->lookAhead(0) != (tok)) \
+ return false; \
+ } while (0)
+
+#define ADVANCE(tok) \
+ do { \
+ MATCH(tok); \
+ lex->nextToken(); \
+ } while (0)
+
+MIParser::MIParser()
+ : lex(0)
+{
+}
+
+MIParser::~MIParser()
+{
+}
+
+Record *MIParser::parse(FileSymbol *file)
+{
+ lex = 0;
+
+ Record *record = 0;
+
+ TokenStream *tokenStream = lexer.tokenize(file);
+ if (!tokenStream)
+ return false;
+
+ lex = file->tokenStream = tokenStream;
+
+ switch (lex->lookAhead()) {
+ case '~':
+ case '@':
+ case '&':
+ parseStreamRecord(record);
+ break;
+ case '(':
+ parsePrompt(record);
+ break;
+ case '^':
+ parseResultRecord(record);
+ break;
+ case '*':
+ // Same as result, only differs in start
+ // marker.
+ parseResultRecord(record);
+ break;
+ default:
+ break;
+ }
+
+ return record;
+}
+
+bool MIParser::parsePrompt(Record *&record)
+{
+ ADVANCE('(');
+ MATCH(Token_identifier);
+ if (lex->currentTokenText() != "gdb")
+ return false;
+ lex->nextToken();
+ ADVANCE(')');
+
+ record = new PromptRecord;
+ return true;
+}
+
+bool MIParser::parseStreamRecord(Record *&record)
+{
+ std::auto_ptr<StreamRecord> stream(new StreamRecord);
+
+ switch (lex->lookAhead()) {
+ case '~':
+ case '@':
+ case '&': {
+ stream->reason = lex->lookAhead();
+ lex->nextToken();
+ MATCH(Token_string_literal);
+ stream->message = parseStringLiteral();
+ record = stream.release();
+ }
+ return true;
+
+ default:
+ break;
+ }
+
+ return false;
+}
+
+bool MIParser::parseResultRecord(Record *&record)
+{
+ if (lex->lookAhead() != '^' && lex->lookAhead() != '*')
+ return false;
+ lex->nextToken();
+
+ MATCH(Token_identifier);
+ QString reason = lex->currentTokenText();
+ lex->nextToken();
+
+ std::auto_ptr<ResultRecord> res(new ResultRecord);
+ res->reason = reason;
+
+ if (lex->lookAhead() != ',') {
+ record = res.release();
+ return true;
+ }
+
+ lex->nextToken();
+
+ if (!parseCSV(*res))
+ return false;
+
+ record = res.release();
+ return true;
+}
+
+bool MIParser::parseResult(Result *&result)
+{
+ MATCH(Token_identifier);
+ QString variable = lex->currentTokenText();
+ lex->nextToken();
+
+ std::auto_ptr<Result> res(new Result);
+ res->variable = variable;
+
+ if (lex->lookAhead() != '=')
+ return true;
+
+ lex->nextToken();
+
+ Value *value = 0;
+ if (!parseValue(value))
+ return false;
+
+ res->value = value;
+ result = res.release();
+
+ return true;
+}
+
+bool MIParser::parseValue(Value *&value)
+{
+ value = 0;
+
+ switch (lex->lookAhead()) {
+ case Token_string_literal: {
+ value = new StringLiteralValue(parseStringLiteral());
+ }
+ return true;
+
+ case '{':
+ return parseTuple(value);
+
+ case '[':
+ return parseList(value);
+
+ default:
+ break;
+ }
+
+ return false;
+}
+
+bool MIParser::parseTuple(Value *&value)
+{
+ TupleValue* val;
+
+ if (!parseCSV(&val, '{', '}'))
+ return false;
+
+ value = val;
+ return true;
+}
+
+bool MIParser::parseList(Value *&value)
+{
+ ADVANCE('[');
+
+ std::auto_ptr<ListValue> lst(new ListValue);
+
+ // Note: can't use parseCSV here because of nested
+ // "is this Value or Result" guessing. Too lazy to factor
+ // that out too using function pointers.
+ int tok = lex->lookAhead();
+ while (tok && tok != ']') {
+ Result *result = 0;
+ Value *val = 0;
+
+ if (tok == Token_identifier)
+ {
+ if (!parseResult(result))
+ return false;
+ }
+ else if (!parseValue(val))
+ return false;
+
+ Q_ASSERT(result || val);
+
+ if (!result) {
+ result = new Result;
+ result->value = val;
+ }
+ lst->results.append(result);
+
+ if (lex->lookAhead() == ',')
+ lex->nextToken();
+
+ tok = lex->lookAhead();
+ }
+ ADVANCE(']');
+
+ value = lst.release();
+
+ return true;
+}
+
+bool MIParser::parseCSV(TupleValue** value,
+ char start, char end)
+{
+ std::auto_ptr<TupleValue> tuple(new TupleValue);
+
+ if (!parseCSV(*tuple, start, end))
+ return false;
+
+ *value = tuple.get();
+ tuple.release();
+ return true;
+}
+
+bool MIParser::parseCSV(GDBMI::TupleValue& value,
+ char start, char end)
+{
+ if (start)
+ ADVANCE(start);
+
+ int tok = lex->lookAhead();
+ while (tok) {
+ if (end && tok == end)
+ break;
+
+ Result *result;
+ if (!parseResult(result))
+ return false;
+
+ value.results.append(result);
+ value.results_by_name.insert(result->variable, result);
+
+ if (lex->lookAhead() == ',')
+ lex->nextToken();
+
+ tok = lex->lookAhead();
+ }
+
+ if (end)
+ ADVANCE(end);
+
+ return true;
+}
+
+
+QString MIParser::parseStringLiteral()
+{
+ QCString message = lex->currentTokenText();
+
+ unsigned int length = message.length();
+ QString message2;
+ message2.setLength(length);
+ // The [1,length-1] range removes quotes without extra
+ // call to 'mid'
+ unsigned target_index = 0;
+ for(unsigned i = 1, e = length-1; i != e; ++i)
+ {
+ int translated = -1;
+ if (message[i] == '\\')
+ {
+ if (i+1 < length)
+ {
+ // TODO: implement all the other escapes, maybe
+ if (message[i+1] == 'n')
+ {
+ translated = '\n';
+ }
+ else if (message[i+1] == '\\')
+ {
+ translated = '\\';
+ }
+ else if (message[i+1] == '"')
+ {
+ translated = '"';
+ }
+ else if (message[i+1] == 't')
+ {
+ translated = '\t';
+ }
+
+ }
+ }
+
+ if (translated != -1)
+ {
+ message2[target_index++] = (char)translated;
+ ++i;
+ }
+ else
+ {
+ message2[target_index++] = message[i];
+ }
+ }
+ message2.setLength(target_index);
+
+ lex->nextToken();
+ return message2;
+}
+
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