|
Java example source code file (ciConstant.hpp)
The ciConstant.hpp Java example source code/* * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_CI_CICONSTANT_HPP #define SHARE_VM_CI_CICONSTANT_HPP #include "ci/ciClassList.hpp" #include "ci/ciNullObject.hpp" // ciConstant // // This class represents a constant value. class ciConstant VALUE_OBJ_CLASS_SPEC { friend class VMStructs; private: friend class ciEnv; friend class ciField; BasicType _type; union { jint _int; jlong _long; jfloat _float; jdouble _double; ciObject* _object; } _value; public: ciConstant() { _type = T_ILLEGAL; _value._long = -1; } ciConstant(BasicType type, jint value) { assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT, "using the wrong ciConstant constructor"); _type = type; _value._int = value; } ciConstant(jlong value) { _type = T_LONG; _value._long = value; } ciConstant(jfloat value) { _type = T_FLOAT; _value._float = value; } ciConstant(jdouble value) { _type = T_DOUBLE; _value._double = value; } ciConstant(BasicType type, ciObject* p) { _type = type; _value._object = p; } BasicType basic_type() const { return _type; } jboolean as_boolean() { assert(basic_type() == T_BOOLEAN, "wrong type"); return (jboolean)_value._int; } jchar as_char() { assert(basic_type() == T_CHAR, "wrong type"); return (jchar)_value._int; } jbyte as_byte() { assert(basic_type() == T_BYTE, "wrong type"); return (jbyte)_value._int; } jshort as_short() { assert(basic_type() == T_SHORT, "wrong type"); return (jshort)_value._int; } jint as_int() { assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR || basic_type() == T_BYTE || basic_type() == T_SHORT || basic_type() == T_INT, "wrong type"); return _value._int; } jlong as_long() { assert(basic_type() == T_LONG, "wrong type"); return _value._long; } jfloat as_float() { assert(basic_type() == T_FLOAT, "wrong type"); return _value._float; } jdouble as_double() { assert(basic_type() == T_DOUBLE, "wrong type"); return _value._double; } ciObject* as_object() const { assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type"); return _value._object; } bool is_null_or_zero() const { if (!is_java_primitive(basic_type())) { return as_object()->is_null_object(); } else if (type2size[basic_type()] == 1) { // treat float bits as int, to avoid comparison with -0 and NaN return (_value._int == 0); } else if (type2size[basic_type()] == 2) { // treat double bits as long, to avoid comparison with -0 and NaN return (_value._long == 0); } else { return false; } } // Debugging output void print(); }; #endif // SHARE_VM_CI_CICONSTANT_HPP Other Java examples (source code examples)Here is a short list of links related to this Java ciConstant.hpp source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.