// $Id: CodeCache.h,v 1.11 1999/08/19 11:27:11 andreas Exp $ -*- C++ -*-
// Machine Code Cache

// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@gnu.org>.
// 
// This file is part of DDD.
// 
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
// 
// DDD 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 for more details.
// 
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page, 
// `http://www.gnu.org/software/ddd/',
// or send a mail to the DDD developers <ddd@gnu.org>.

#ifndef _DDD_CodeCache_h
#define _DDD_CodeCache_h

#ifdef __GNUG__
#pragma interface
#endif

#include "strclass.h"
#include "bool.h"
#include "VarArray.h"
#include <ctype.h>

// A single entry in the code cache
struct CodeCacheEntry {
    string start;		// First location
    string end;			// Last location
    string code;		// Actual code

    CodeCacheEntry()
        : start(), end(), code()
    {}
    CodeCacheEntry(const string& s, const string& e, const string& c)
	: start(s), end(e), code(c)
    {}
    CodeCacheEntry(const CodeCacheEntry& cce)
	: start(cce.start), end(cce.end), code(cce.code)
    {}
    CodeCacheEntry& operator = (const CodeCacheEntry& cce)
    {
	start = cce.start;
	end   = cce.end;
	code  = cce.code;
	return *this;
    }
    bool operator == (const CodeCacheEntry& cce)
    {
	return start == cce.start
	    && end == cce.end
	    && code == cce.code;
    }
    bool operator != (const CodeCacheEntry& cce)
    {
	return !operator==(cce);
    }
};

typedef VarArray<CodeCacheEntry> CodeCache;


// Compare addresses: 
// return Z such that Z < 0 if X < Y, Z == 0 if X == Y, Z > 0 if X > Y
int compare_address(const string& x, const string& y);

// Return true if C is a leading zero character
inline bool is_leading_zero(char c)
{
    return c == '0' || c == 'x' || c == 'X' || c == 'H' || c == '\'' 
	|| isspace(c);
}

// Return true if C is a trailing zero character
inline bool is_trailing_zero(char c)
{
    return c == 'h' || c == 'H' || isspace(c);
}

#endif // _DDD_CodeCache_h
// DON'T ADD ANYTHING BEHIND THIS #endif
