integers.hpp

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/*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2024 Denis Corbin
//
// This program 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.
//
// This program 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 02110-1301 USA.
//
// to contact the author, see the AUTHOR file
/*********************************************************************/
 
 
 
#ifndef INTEGERS_HPP
#define INTEGERS_HPP
 
#include "../my_config.h"
#include <string>
 
 
#ifndef OS_BITS
 
#if HAVE_INTTYPES_H
extern "C"
{
#if HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#if HAVE_LIMITS_H
#include <limits.h>
#endif
} // end extern "C"
 
namespace libdar
{
    using U_8 = unsigned char;
    using U_16 = uint16_t;
    using U_32 = uint32_t;
    using U_64 = uint64_t;
    using U_I = size_t;
    // configure will define size_t as "unsigned int" if it not defined by system headers
    // thus using U_I we are sure we can compare buffer sizes with SSIZE_MAX
    using S_8 =  signed char;
    using S_16 = int16_t;
    using S_32 = int32_t;
    using S_64 = int64_t;
    using S_I = signed int;
 
}
 
#else // HAVE_INTTYPES_H
#error "Cannot determine interger types, use --enable-os-bits=... with the 'configure' script according to your system's CPU register size"
#endif // HAVE_INTTYPES_H
 
#else  //  OS_BITS is defined
#if OS_BITS == 32
 
namespace libdar
{
    using U_8 = unsigned char;
    using U_16 = unsigned short;
    using U_32 = unsigned long;
    using U_64 = unsigned long long;
    using U_I = size_t;
    using S_8 = signed char;
    using S_16 = signed short;
    using S_32 = signed long;
    using S_64 = signed long long;
    using S_I = signed int;
 
}
 
#else // OS_BITS != 32
#if OS_BITS == 64
 
namespace libdar
{
    using U_8 = unsigned char;
    using U_16 = unsigned short;
    using U_32 = unsigned int;
    using U_64 = unsigned long long;
    using U_I = size_t;
    using S_8 = signed char;
    using S_16 = signed short;
    using S_32 = signed int;
    using S_64 = signed long long;
    using S_I = signed int;
 
}
 
#else // OS_BITS != 32 and OS_BITS != 64
#error "unknown value given to --enable-os-bits=... check the 'configure' script arguments"
    // unknown OS_BITS value ! use --enable-os-bits=... option to configure script
    //
    // the previous line should not compile, this is the expected behaviour
 
#endif // OS_BITS == 64
#endif // OS_BITS == 32
#endif // OS_BITS not defined
 
namespace libdar
{
 
 
 
    void integer_check();
 
 
 
    bool integers_system_is_big_endian();
 
}
 
 
 
#endif // header file multiple inclusion protection