From 2eef69eb63f3a5637f8711944e3d056672872f20 Mon Sep 17 00:00:00 2001
From: Dejan Jovanović <dejan.jovanovic@gmail.com>
Date: Fri, 18 Dec 2009 05:07:19 +0000
Subject: Lots of parser changes to make Chris happy. Yet more to come later.

---
 src/parser/parser.cpp | 89 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 85 insertions(+), 4 deletions(-)

(limited to 'src/parser/parser.cpp')

diff --git a/src/parser/parser.cpp b/src/parser/parser.cpp
index 2ff409686..e919a53e8 100644
--- a/src/parser/parser.cpp
+++ b/src/parser/parser.cpp
@@ -15,6 +15,7 @@
 
 #include <iostream>
 #include <fstream>
+#include <antlr/CharScanner.hpp>
 
 #include "parser.h"
 #include "util/command.h"
@@ -27,14 +28,11 @@
 #include "parser/cvc/generated/AntlrCvcLexer.hpp"
 
 using namespace std;
+using namespace antlr;
 
 namespace CVC4 {
 namespace parser {
 
-Parser::Parser(ExprManager* em) :
-  d_expr_manager(em), d_done(false) {
-}
-
 void Parser::setDone(bool done) {
   d_done = done;
 }
@@ -43,5 +41,88 @@ bool Parser::done() const {
   return d_done;
 }
 
+Command* Parser::parseNextCommand() throw (ParserException) {
+  Command* cmd = 0;
+  if(!done()) {
+    try {
+      cmd = d_antlrParser->parseCommand();
+      if(cmd == 0) {
+        setDone();
+        cmd = new EmptyCommand("EOF");
+      }
+    } catch(antlr::ANTLRException& e) {
+      setDone();
+      throw ParserException(e.toString());
+    }
+  }
+  return cmd;
+}
+
+Expr Parser::parseNextExpression() throw (ParserException) {
+  Expr result;
+  if(!done()) {
+    try {
+      result = d_antlrParser->parseExpr();
+      if(result.isNull())
+        setDone();
+    } catch(antlr::ANTLRException& e) {
+      setDone();
+      throw ParserException(e.toString());
+    }
+  }
+  return result;
+}
+
+Parser::~Parser() {
+  delete d_antlrParser;
+  delete d_antlrLexer;
+  if (d_deleteInput) delete d_input;
+}
+
+Parser::Parser(istream* input, AntlrParser* antlrParser, CharScanner* antlrLexer, bool deleteInput) :
+  d_done(false), d_input(input), d_antlrParser(antlrParser), d_antlrLexer(antlrLexer), d_deleteInput(deleteInput) {
+}
+
+Parser* Parser::getNewParser(ExprManager* em, InputLanguage lang,
+                             istream* input, string filename, bool deleteInput) {
+
+  AntlrParser* antlrParser = 0;
+  antlr::CharScanner* antlrLexer = 0;
+
+  switch(lang) {
+  case LANG_CVC4: {
+    antlrLexer = new AntlrCvcLexer(*input);
+    antlrLexer->setFilename(filename);
+    antlrParser = new AntlrCvcParser(*antlrLexer);
+    antlrParser->setFilename(filename);
+    antlrParser->setExpressionManager(em);
+    break;
+  }
+  case LANG_SMTLIB: {
+    antlrLexer = new AntlrSmtLexer(*input);
+    antlrLexer->setFilename(filename);
+    antlrParser = new AntlrSmtParser(*antlrLexer);
+    antlrParser->setFilename(filename);
+    antlrParser->setExpressionManager(em);
+    break;
+  }
+  default:
+    Unhandled("Unknown Input language!");
+  }
+
+  return new Parser(input, antlrParser, antlrLexer, deleteInput);
+}
+
+Parser* Parser::getNewParser(ExprManager* em, InputLanguage lang,
+                             string filename) {
+  istream* input = new ifstream(filename.c_str());
+  return getNewParser(em, lang, input, filename, true);
+}
+
+Parser* Parser::getNewParser(ExprManager* em, InputLanguage lang,
+                             istream& input) {
+  return getNewParser(em, lang, &input, "", false);
+}
+
 }/* CVC4::parser namespace */
 }/* CVC4 namespace */
-- 
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