| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.jetbrains.python.psi.impl; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.psi.tree.IElementType; |
| import com.jetbrains.python.psi.PyElementVisitor; |
| import com.jetbrains.python.psi.types.TypeEvalContext; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import com.jetbrains.python.PyElementTypes; |
| import com.jetbrains.python.psi.PyNumericLiteralExpression; |
| import com.jetbrains.python.psi.types.PyType; |
| |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * @author yole |
| */ |
| public class PyNumericLiteralExpressionImpl extends PyElementImpl |
| implements PyNumericLiteralExpression { |
| //TOLATER: imaginary numbers |
| private static final Pattern PATTERN_INT = Pattern.compile( |
| "(?:" |
| + "([1-9]\\d*)" |
| + "|(0)" |
| + "|(0[0-7]+)" |
| + "|(?:0x([0-9a-f]+))" |
| + ")L?", Pattern.CASE_INSENSITIVE); |
| |
| private static final Pattern PATTERN_FLOAT = Pattern.compile( |
| "(" // 1 |
| + "(\\d+)" // 2 |
| + "(?:\\.(\\d+)?)?" // 3 |
| + "|\\.(\\d+))" // 4 |
| + "(e(\\+|-)?(\\d))?", // 5, 6, 7 |
| Pattern.CASE_INSENSITIVE); |
| |
| public PyNumericLiteralExpressionImpl(ASTNode astNode) { |
| super(astNode); |
| } |
| |
| @Override protected void acceptPyVisitor(PyElementVisitor pyVisitor) { |
| pyVisitor.visitPyNumericLiteralExpression(this); |
| } |
| |
| public Long getLongValue() { |
| BigInteger value = getBigIntegerValue(); |
| long longValue = value.longValue(); |
| if (BigInteger.valueOf(longValue).equals(value)) { |
| return longValue; |
| } else { |
| return null; |
| } |
| } |
| |
| public BigInteger getBigIntegerValue() { |
| ASTNode node = getNode(); |
| String text = node.getText(); |
| IElementType type = node.getElementType(); |
| if (type == PyElementTypes.INTEGER_LITERAL_EXPRESSION) { |
| return getBigIntegerValue(text); |
| } else { |
| return getBigDecimalValue().toBigInteger(); |
| } |
| } |
| |
| public BigDecimal getBigDecimalValue() { |
| ASTNode node = getNode(); |
| String text = node.getText(); |
| IElementType type = node.getElementType(); |
| if (type == PyElementTypes.INTEGER_LITERAL_EXPRESSION) { |
| return new BigDecimal(getBigIntegerValue(text)); |
| } |
| Matcher m = PATTERN_FLOAT.matcher(text); |
| boolean matches = m.matches(); |
| assert matches; |
| BigDecimal whole; |
| if (m.group(2) != null) { |
| whole = new BigDecimal(m.group(2)); |
| String fractionStr = m.group(3); |
| BigDecimal fraction = BigDecimal.ZERO; |
| if (fractionStr != null) { |
| fraction = new BigDecimal("0." + fractionStr); |
| } |
| whole = whole.add(fraction); |
| } else if (m.group(4) != null) { |
| whole = new BigDecimal("0." + m.group(4)); |
| } else { |
| throw new IllegalStateException("Cannot parse BigDecimal for " + text); |
| } |
| if (m.group(5) != null) { |
| String sign = m.group(6); |
| if (sign == null) sign = "+"; |
| String exp = m.group(7); |
| whole = whole.multiply(new BigDecimal("1e" + sign + exp)); |
| } |
| return whole; |
| } |
| |
| public boolean isIntegerLiteral() { |
| return getNode().getElementType() == PyElementTypes.INTEGER_LITERAL_EXPRESSION; |
| } |
| |
| private static @Nullable BigInteger getBigIntegerValue(String text) { |
| Matcher m = PATTERN_INT.matcher(text); |
| if (!m.matches()) return null; |
| int radix; |
| if (m.group(1) != null) { |
| radix = 10; |
| } else if (m.group(2) != null) { |
| return BigInteger.ZERO; |
| } else if (m.group(3) != null) { |
| radix = 8; |
| } else if (m.group(4) != null) { |
| radix = 16; |
| } else { |
| throw new IllegalStateException("No radix found: " + text); |
| } |
| if (StringUtil.endsWithIgnoreCase(text, "L")) { |
| text = text.substring(0, text.length()-1); |
| } |
| return new BigInteger(text, radix); |
| } |
| |
| public PyType getType(@NotNull TypeEvalContext context, @NotNull TypeEvalContext.Key key) { |
| ASTNode node = getNode(); |
| IElementType type = node.getElementType(); |
| if (type == PyElementTypes.INTEGER_LITERAL_EXPRESSION) { |
| return PyBuiltinCache.getInstance(this).getIntType(); |
| } else if (type == PyElementTypes.FLOAT_LITERAL_EXPRESSION) { |
| return PyBuiltinCache.getInstance(this).getFloatType(); |
| } |
| else if (type == PyElementTypes.IMAGINARY_LITERAL_EXPRESSION) { |
| return PyBuiltinCache.getInstance(this).getComplexType(); |
| } |
| return null; |
| } |
| } |