1  /* Expression evaluation for plural form selection.
       2     Copyright (C) 2005-2006, 2019 Free Software Foundation, Inc.
       3     Written by Bruno Haible <bruno@clisp.org>, 2005.
       4  
       5     This program is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU General Public License as published by
       7     the Free Software Foundation; either version 3 of the License, or
       8     (at your option) any later version.
       9  
      10     This program is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13     GNU General Public License for more details.
      14  
      15     You should have received a copy of the GNU General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _PLURAL_EVAL_H
      19  #define _PLURAL_EVAL_H
      20  
      21  
      22  /* Definition of 'struct expression', and
      23     declaration of extract_plural_expression() and plural_eval().  */
      24  #include "plural-exp.h"
      25  
      26  
      27  /* Protection against signals during plural evaluation.  */
      28  
      29  #include <setjmp.h>
      30  
      31  /* Some platforms don't have the sigjmp_buf type in <setjmp.h>.  */
      32  #if defined _MSC_VER || defined __MINGW32__
      33  /* Native Woe32 API.  */
      34  # define sigjmp_buf jmp_buf
      35  # define sigsetjmp(env,savesigs) setjmp (env)
      36  # define siglongjmp longjmp
      37  #endif
      38  
      39  /* We use siginfo to get precise information about the signal.
      40     But siginfo doesn't work on Irix 6.5 and on Cygwin 2005.  */
      41  #if HAVE_SIGINFO && !defined (__sgi) && !defined (__CYGWIN__)
      42  # define USE_SIGINFO 1
      43  #endif
      44  
      45  #ifdef __cplusplus
      46  extern "C" {
      47  #endif
      48  
      49  /* Exit point.  Must be set before calling install_sigfpe_handler().  */
      50  extern sigjmp_buf sigfpe_exit;
      51  
      52  #if USE_SIGINFO
      53  /* Additional information that is set before sigfpe_exit is invoked.  */
      54  extern int volatile sigfpe_code;
      55  #endif
      56  
      57  /* Protect against signals during plural evaluation.  Must be called around
      58     calls to plural_eval().  Must be called in pairs.  */
      59  extern void install_sigfpe_handler (void);
      60  extern void uninstall_sigfpe_handler (void);
      61  
      62  #ifdef __cplusplus
      63  }
      64  #endif
      65  
      66  
      67  #endif /* _PLURAL_EVAL_H */