Examples of ptolemy.data.type.FixType

ptolemy.data.type.FixType
This class represents the type of fix point token objects. Generally the type of a fix point token includes the precision of the token, along with the rounding and quantization techniques that are being applied. @author Steve Neuendorffer @version $Id: FixType.java,v 1.46 2007/12/07 06:31:54 cxh Exp $ @since Ptolemy II 2.1 @Pt.ProposedRating Red (neuendor) @Pt.AcceptedRating Red


    /** Return the type of this token.
     *  @return an instance of FixType;
     */
    public Type getType() {
        return new FixType(_value.getPrecision());
    }

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                ptolemy.data.Token length = parseTreeEvaluator
                        .evaluateParseTree(lengthNode, _scope);


                ptolemy.data.Token integerBits = parseTreeEvaluator
                        .evaluateParseTree(integerBitsNode, _scope);
                _setType(node, new FixType(new Precision(((ScalarToken) length)
                        .intValue(), ((ScalarToken) integerBits).intValue())));
                return;
            } catch (Throwable throwable) {
                // Do nothing... rely on the regular method resolution
                // to generate the right type.

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                        "Invalid precision (not a 1 by 2 matrix).");
            }


            Precision precision = new Precision(token.getElementAt(0, 0), token
                    .getElementAt(0, 1));
            output.setTypeEquals(new FixType(precision));
            _quantization = _quantization.setPrecision(precision);
        } else if (attribute == rounding) {
            Rounding r = Rounding.getName(rounding.getExpression());
            _quantization = _quantization.setRounding(r);
        } else if (attribute == overflow) {

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                    .getElementAt(0, 1));
            _quantization = _quantization.setPrecision(precision);
            if (_quantization.getOverflow() == Overflow.GROW) {
                output.setTypeEquals(BaseType.UNSIZED_FIX);
            } else {
                output.setTypeEquals(new FixType(_quantization.getPrecision()));
            }
        } else if (attribute == rounding) {
            Rounding r = Rounding.getName(rounding.getExpression());
            _quantization = _quantization.setRounding(r);
        } else if (attribute == overflow) {
            Overflow o = Overflow.forName(overflow.getExpression());
            _quantization = _quantization.setOverflow(o);
            if (_quantization.getOverflow() == Overflow.GROW) {
                output.setTypeEquals(BaseType.UNSIZED_FIX);
            } else {
                output.setTypeEquals(new FixType(_quantization.getPrecision()));
            }
        } else {
            super.attributeChanged(attribute);
        }
    }

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Related Classes of ptolemy.data.type.FixType

ptolemy.actor.lib.conversions.DoubleToFix

ptolemy.actor.lib.conversions.FixToFix

ptolemy.data.expr.ParseTreeTypeInference

ptolemy.data.FixToken

ptolemy.math.FixPointQuantization

ptolemy.math.Precision

ptolemy.kernel.util.IllegalActionException

ptolemy.kernel.util.InternalErrorException

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