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/*
Copyright (c) 2014 - 2016 The Regents of the University of
California (Regents). All Rights Reserved. Redistribution and use in
source and binary forms, with or without modification, are permitted
provided that the following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the following
two paragraphs of disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
two paragraphs of disclaimer in the documentation and/or other materials
provided with the distribution.
* Neither the name of the Regents nor the names of its contributors
may be used to endorse or promote products derived from this
software without specific prior written permission.
IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
REGENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF
ANY, PROVIDED HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION
TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
MODIFICATIONS.
*/
package firrtl
import org.antlr.v4.runtime._;
import org.antlr.v4.runtime.atn._;
import org.antlr.v4.runtime.tree._;
import com.typesafe.scalalogging.LazyLogging
import java.io.FileInputStream
import scala.collection.JavaConverters._
import scala.io.Source
import Utils._
import antlr._
class ParserException(message: String) extends Exception(message)
case class ParameterNotSpecifiedException(message: String) extends ParserException(message)
case class ParameterRedefinedException(message: String) extends ParserException(message)
object Parser extends LazyLogging
{
/** Takes Iterator over lines of FIRRTL, returns AST (root node is Circuit)
*
* Parser performs conversion to machine firrtl
*/
def parse(filename: String, lines: Iterator[String]): Circuit = {
val fixedInput = Translator.addBrackets(lines)
//logger.debug("Preprocessed Input:\n" + fixedInput.result)
val antlrStream = new ANTLRInputStream(fixedInput.result)
val lexer = new FIRRTLLexer(antlrStream)
val tokens = new CommonTokenStream(lexer)
val parser = new FIRRTLParser(tokens)
// FIXME Dangerous (TODO)
parser.getInterpreter.setPredictionMode(PredictionMode.SLL)
// Concrete Syntax Tree
val cst = parser.circuit
val numSyntaxErrors = parser.getNumberOfSyntaxErrors
if (numSyntaxErrors > 0) throw new ParserException(s"${numSyntaxErrors} syntax error(s) detected")
val visitor = new Visitor(filename)
//val ast = visitor.visitCircuit(cst) match {
val ast = visitor.visit(cst) match {
case c: Circuit => c
case x => throw new ClassCastException("Error! AST not rooted with Circuit node!")
}
ast
}
def parse(lines: Seq[String]): Circuit = parse("<None>", lines.iterator)
}
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