workbench/libs/codesetslib/src/macros.h

   1 /***************************************************************************
   2
   3  codesets.library - Amiga shared library for handling different codesets
   4  Copyright (C) 2001-2005 by Alfonso [alfie] Ranieri <alforan@tin.it>.
   5  Copyright (C) 2005-2007 by codesets.library Open Source Team
   6
   7  This library is free software; you can redistribute it and/or
   8  modify it under the terms of the GNU Lesser General Public
   9  License as published by the Free Software Foundation; either
  10  version 2.1 of the License, or (at your option) any later version.
  11
  12  This library is distributed in the hope that it will be useful,
  13  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  Lesser General Public License for more details.
  16
  17  codesets.library project: http://sourceforge.net/projects/codesetslib/
  18
  19  $Id$
  20
  21 ***************************************************************************/
  22
  23 #ifndef _MACROS_H
  24 #define _MACROS_H
  25
  26 /****************************************************************************/
  27 /*
  28 ** Some useful macros
  29 */
  30
  31 #ifndef __AROS__
  32 #include "SDI_compiler.h"
  33 #endif
  34
  35 #if defined(__amigaos4__)
  36 #define GETINTERFACE(iface, base)       (iface = (APTR)GetInterface((struct Library *)(base), "main", 1L, NULL))
  37 #define DROPINTERFACE(iface)                    (DropInterface((struct Interface *)iface), iface = NULL)
  38 #else
  39 #define GETINTERFACE(iface, base)       TRUE
  40 #define DROPINTERFACE(iface)
  41 #endif
  42
  43 // special flagging macros
  44 #define isFlagSet(v,f)      (((v) & (f)) == (f))  // return TRUE if the flag is set
  45 #define hasFlag(v,f)        (((v) & (f)) != 0)    // return TRUE if one of the flags in f is set in v
  46 #define isFlagClear(v,f)    (((v) & (f)) == 0)    // return TRUE if flag f is not set in v
  47 #define SET_FLAG(v,f)       ((v) |= (f))          // set the flag f in v
  48 #define CLEAR_FLAG(v,f)     ((v) &= ~(f))         // clear the flag f in v
  49 #define MASK_FLAG(v,f)      ((v) &= (f))          // mask the variable v with flag f bitwise
  50
  51 /****************************************************************************/
  52
  53 #endif /* _MACROS_H */