lib/msvc-nothrow.h

/* Wrappers that don't throw invalid parameter notifications
   with MSVC runtime libraries.
   Copyright (C) 2011-2026 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   This file 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#ifndef _MSVC_NOTHROW_H
#define _MSVC_NOTHROW_H

/* With MSVC runtime libraries with the "invalid parameter handler" concept,
   functions like fprintf(), dup2(), or close() crash when the caller passes
   an invalid argument.  But POSIX wants error codes (such as EINVAL or EBADF)
   instead.
   This file defines wrappers that turn such an invalid parameter notification
   into an error code.  */

/* This file uses HAVE_MSVC_INVALID_PARAMETER_HANDLER.  */
#if !_GL_CONFIG_H_INCLUDED
 #error "Please include config.h first."
#endif

#if defined _WIN32 && ! defined __CYGWIN__

/* Get original declaration of _get_osfhandle.  */
# include <io.h>

# ifdef __cplusplus
extern "C" {
# endif

# if HAVE_MSVC_INVALID_PARAMETER_HANDLER

/* Override _get_osfhandle.  */
extern intptr_t _gl_nothrow_get_osfhandle (int fd);
#  define _get_osfhandle _gl_nothrow_get_osfhandle

# endif

# ifdef __cplusplus
}
# endif

#endif

#endif /* _MSVC_NOTHROW_H */