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constant.h Go to the documentation of this file. // $Id: constant.h,v 1.12 2003/08/11 17:15:42 abrown Exp $ // ---------------------------------------------------------------------- // // C-Breeze // C Compiler Framework // // Copyright (c) 2000 University of Texas at Austin // // Samuel Z. Guyer // Daniel A. Jimenez // Calvin Lin // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, copy, // modify, merge, publish, distribute, sublicense, and/or sell copies // of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT // AUSTIN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // // We acknowledge the C-to-C Translator from MIT Laboratory for // Computer Science for inspiring parts of the C-Breeze design. // // ---------------------------------------------------------------------- #ifndef CBZ_CONSTANT_H #define CBZ_CONSTANT_H #include "basic_type.h" #include "operators.h" class constant { private: union { signed char SChar; unsigned char UChar; signed short int SShort; unsigned short int UShort; signed int SInt; unsigned int UInt; signed long int SLong; unsigned long int ULong; float Float; double Double; char * Str; void * Ptr; } _v; basic_type _bt; bool _is_ptr; bool _is_str; bool _no_val; public: inline const basic_type & basic() const { return _bt; } constant(signed char SChar) : _bt(basic_type::SChar), _is_ptr(false), _is_str(false), _no_val(false) { _v.SChar = SChar; } inline signed char SChar() const { return _v.SChar; } inline void SChar(signed char val) { *this = constant(val); } constant(unsigned char UChar) : _bt(basic_type::UChar), _is_ptr(false), _is_str(false), _no_val(false) { _v.UChar = UChar; } inline unsigned char UChar() const { return _v.UChar; } inline void UChar(unsigned char val) { *this = constant(val); } constant(signed short int SShort) : _bt(basic_type::SShort), _is_ptr(false), _is_str(false), _no_val(false) { _v.SShort = SShort; } inline signed short int SShort() const { return _v.SShort; } inline void SShort(signed short int val) { *this = constant(val); } constant(unsigned short int UShort) : _bt(basic_type::UShort), _is_ptr(false), _is_str(false), _no_val(false) { _v.UShort = UShort; } inline unsigned short int UShort() const { return _v.UShort; } inline void UShort(unsigned short int val) { *this = constant(val); } constant(signed int SInt) : _bt(basic_type::SInt), _is_ptr(false), _is_str(false), _no_val(false) { _v.SInt = SInt; } inline signed int SInt() const { return _v.SInt; } inline void SInt(signed int val) { *this = constant(val); } constant(unsigned int UInt) : _bt(basic_type::UInt), _is_ptr(false), _is_str(false), _no_val(false) { _v.UInt = UInt; } inline unsigned int UInt() const { return _v.UInt; } inline void UInt(unsigned int val) { *this = constant(val); } constant(signed long int SLong) : _bt(basic_type::SLong), _is_ptr(false), _is_str(false), _no_val(false) { _v.SLong = SLong; } inline signed long int SLong() const { return _v.SLong; } inline void SLong(signed long int val) { *this = constant(val); } constant(unsigned long int ULong) : _bt(basic_type::ULong), _is_ptr(false), _is_str(false), _no_val(false) { _v.ULong = ULong; } inline unsigned long int ULong() const { return _v.ULong; } inline void ULong(unsigned long int val) { *this = constant(val); } constant(float Float) : _bt(basic_type::Float), _is_ptr(false), _is_str(false), _no_val(false) { _v.Float = Float; } inline float Float() const { return _v.Float; } inline void Float(float val) { *this = constant(val); } constant(double Double) : _bt(basic_type::Double), _is_ptr(false), _is_str(false), _no_val(false) { _v.Double = Double; } inline double Double() const { return _v.Double; } inline void Double(double val) { *this = constant(val); } constant(const char * Str) : _bt(), _is_ptr(false), _is_str(true), _no_val(false) { _v.Str = strdup(Str); } inline char * Str() const { return _v.Str; } inline bool is_str() const { return _is_str; } constant(void * Ptr) : _bt(), _is_ptr(true), _is_str(false), _no_val(false) { _v.Ptr = Ptr; } inline void * Ptr() const { return _v.Ptr; } inline bool is_ptr() const { return _is_ptr; } constant() : _bt(), _is_ptr(false), _is_str(false), _no_val(true) {} inline bool no_val() const { return _no_val; } inline void set_no_val() { _no_val = true; } // -- Copy constructor constant(const constant & other); // -- Destructor ~constant(); // -- Assignment operators constant & operator=(const constant & rhs); // -- More general operations.. unsigned long Integer() const; bool Boolean() const; bool is_zero() const; void make_zero(); // -- Comparison bool is_equal_to(const constant & other) const; // -- Less-than operator, for sets and maps bool operator<(const constant & other) const; // -- Evaluate expressions static constant eval(const Operator * op, const constant & operand1, const constant & operand2); static constant eval(const Operator * op, const constant & operand); static constant cast(const basic_type & new_bt, const constant & con); // -- Output as a string... // wantQuoteChar - if true, format char as 'x' // if false, format char as a number, like any other string to_string(bool wantQuoteChar = true) const; private: static void print_char(int value, ostringstream & ost); }; #endif // CBZ_CONSTANT_H

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