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CodeCache.C
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1998-03-25
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// $Id: CodeCache.C,v 1.9 1998/03/25 12:42:36 zeller Exp $ -*- C++ -*-
// Machine Code Cache
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// 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.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char CodeCache_rcsid[] =
"$Id: CodeCache.C,v 1.9 1998/03/25 12:42:36 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#pragma implementation "VarArray.h"
#pragma implementation "DynArray.h"
#endif
#include <Xm/Xm.h>
#include "CodeCache.h"
// Return digit value
inline int xdigit(char c)
{
switch (c)
{
case '0': return 0;
case '1': return 1;
case '2': return 2;
case '3': return 3;
case '4': return 4;
case '5': return 5;
case '6': return 6;
case '7': return 7;
case '8': return 8;
case '9': return 9;
case 'a': case 'A': return 10;
case 'b': case 'B': return 11;
case 'c': case 'C': return 12;
case 'd': case 'D': return 13;
case 'e': case 'E': return 14;
case 'f': case 'F': return 15;
default: return -1;
}
}
// 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)
{
unsigned int px = 0;
unsigned int py = 0;
while (px < x.length() && is_leading_zero(x[px]))
px++;
while (py < y.length() && is_leading_zero(y[py]))
py++;
unsigned int lx = x.length() - px;
unsigned int ly = y.length() - py;
while (lx > 0 && is_trailing_zero(x[px + lx - 1]))
lx--;
while (ly > 0 && is_trailing_zero(y[py + ly - 1]))
ly--;
int ret = lx - ly;
for (unsigned i = 0; ret == 0 && i < lx; i++)
ret = xdigit(x[px + i]) - xdigit(y[py + i]);
#if 0
if (ret < 0)
clog << x << " < " << y << "\n";
else if (ret > 0)
clog << x << " > " << y << "\n";
else
clog << x << " = " << y << "\n";
#endif
return ret;
}