xapian-core/common/internaltypes.h

   1 /** @file internaltypes.h
   2  * @brief Types used internally.
   3  */
   4 /* Copyright (C) 2009,2010,2014 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  19  * USA
  20  */
  21
  22 #ifndef XAPIAN_INCLUDED_INTERNALTYPES_H
  23 #define XAPIAN_INCLUDED_INTERNALTYPES_H
  24
  25 #include <climits>
  26
  27 /// Unsigned 8 bit type.
  28 typedef unsigned char byte;
  29
  30 #ifndef SIZEOF_SHORT
  31 # error SIZEOF_SHORT is not defined
  32 #endif
  33 #ifndef SIZEOF_INT
  34 # error SIZEOF_INT is not defined
  35 #endif
  36 #ifndef SIZEOF_LONG
  37 # error SIZEOF_LONG is not defined
  38 #endif
  39
  40 #if SIZEOF_SHORT * CHAR_BIT == 16
  41 typedef unsigned short uint2;
  42 #else
  43 # error Type short is more than 16 bits, which Xapian does not currently handle
  44 #endif
  45
  46 #if SIZEOF_INT * CHAR_BIT >= 32
  47 typedef unsigned int uint4;
  48 #elif SIZEOF_LONG * CHAR_BIT >= 32
  49 typedef unsigned long uint4;
  50 #else
  51 # error Type long is less than 32 bits, which ISO does not allow!
  52 #endif
  53
  54 #if SIZEOF_LONG * CHAR_BIT >= 64
  55 typedef unsigned long uint8;
  56 #else
  57 /* C99 and C++11 actually standardised "long long", but it seems to be widely
  58  * supported (e.g. GCC has supported it for ages, MSVC since at least 2003 it
  59  * appears) and we've not had any reports of compilation failing due to lack of
  60  * support for it.
  61  */
  62 typedef unsigned long long uint8;
  63 #endif
  64
  65 /// Integer type used to hold the total length of all documents in a database.
  66 typedef uint8 totlen_t;
  67
  68 #endif // XAPIAN_INCLUDED_INTERNALTYPES_H