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/* Checked_Number class implementation: non-inline template functions.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL 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 3 of the License, or (at your
option) any later version.
The PPL 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 this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#ifndef PPL_Checked_Number_templates_hh
#define PPL_Checked_Number_templates_hh 1
#include "assert.hh"
#include <iomanip>
#include <limits>
namespace Parma_Polyhedra_Library {
template <typename T>
typename Enable_If<Is_Native_Or_Checked<T>::value, void>::type
ascii_dump(std::ostream& s, const T& t) {
if (std::numeric_limits<T>::is_exact)
// An exact datatype: pretty printer is accurate.
s << t;
else {
// An inexact datatype (probably floating point):
// first dump its hexadecimal representation ...
const std::ios_base::fmtflags old_flags = s.flags();
s << std::hex;
const unsigned char* p = reinterpret_cast<const unsigned char*>(&t);
for (unsigned i = 0; i < sizeof(T); ++i) {
s << std::setw(2) << std::setfill('0');
s << static_cast<unsigned>(p[i]);
}
s.flags(old_flags);
// ... and then pretty print it for readability.
s << " (" << t << ")";
}
}
template <typename T>
typename Enable_If<Is_Native_Or_Checked<T>::value, bool>::type
ascii_load(std::istream& s, T& t) {
if (std::numeric_limits<T>::is_exact)
// An exact datatype: input from pretty printed version is accurate.
return s >> t;
else {
// An inexact datatype (probably floating point):
// first load its hexadecimal representation ...
std::string str;
if (!(s >> str) || str.size() != 2*sizeof(T))
return false;
unsigned char* p = reinterpret_cast<unsigned char*>(&t);
// CHECKME: any (portable) simpler way?
for (unsigned i = 0; i < sizeof(T); ++i) {
unsigned byte_value = 0;
for (unsigned j = 0; j < 2; ++j) {
byte_value <<= 4;
unsigned half_byte_value;
// Interpret single hex character.
switch (str[2*i+j]) {
case '0':
half_byte_value = 0;
break;
case '1':
half_byte_value = 1;
break;
case '2':
half_byte_value = 2;
break;
case '3':
half_byte_value = 3;
break;
case '4':
half_byte_value = 4;
break;
case '5':
half_byte_value = 5;
break;
case '6':
half_byte_value = 6;
break;
case '7':
half_byte_value = 7;
break;
case '8':
half_byte_value = 8;
break;
case '9':
half_byte_value = 9;
break;
case 'A':
case 'a':
half_byte_value = 10;
break;
case 'B':
case 'b':
half_byte_value = 11;
break;
case 'C':
case 'c':
half_byte_value = 12;
break;
case 'D':
case 'd':
half_byte_value = 13;
break;
case 'E':
case 'e':
half_byte_value = 14;
break;
case 'F':
case 'f':
half_byte_value = 15;
break;
default:
return false;
}
byte_value += half_byte_value;
}
PPL_ASSERT(byte_value <= 255);
p[i] = static_cast<unsigned char>(byte_value);
}
// ... then read and discard pretty printed value.
if (!(s >> str))
return false;
const unsigned sz = str.size();
return sz > 2 && str[0] == '(' && str[sz-1] == ')';
}
}
} // namespace Parma_Polyhedra_Library
#endif // !defined(PPL_Checked_Number_templates_hh)
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