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       1                 :            : /* Coordinate ELF library and application versions.
       2                 :            :    Copyright (C) 1998, 1999, 2000, 2002 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
       5                 :            : 
       6                 :            :    This file is free software; you can redistribute it and/or modify
       7                 :            :    it under the terms of either
       8                 :            : 
       9                 :            :      * the GNU Lesser General Public License as published by the Free
      10                 :            :        Software Foundation; either version 3 of the License, or (at
      11                 :            :        your option) any later version
      12                 :            : 
      13                 :            :    or
      14                 :            : 
      15                 :            :      * the GNU General Public License as published by the Free
      16                 :            :        Software Foundation; either version 2 of the License, or (at
      17                 :            :        your option) any later version
      18                 :            : 
      19                 :            :    or both in parallel, as here.
      20                 :            : 
      21                 :            :    elfutils is distributed in the hope that it will be useful, but
      22                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24                 :            :    General Public License for more details.
      25                 :            : 
      26                 :            :    You should have received copies of the GNU General Public License and
      27                 :            :    the GNU Lesser General Public License along with this program.  If
      28                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      29                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include <config.h>
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include <libelfP.h>
      35                 :            : 
      36                 :            : 
      37                 :            : /* Is the version initialized?  */
      38                 :            : int __libelf_version_initialized;
      39                 :            : 
      40                 :            : /* Currently selected version.  */
      41                 :            : unsigned int __libelf_version = EV_CURRENT;
      42                 :            : 
      43                 :            : 
      44                 :            : unsigned int
      45                 :       6333 : elf_version (version)
      46                 :            :      unsigned int version;
      47                 :            : {
      48         [ -  + ]:       6333 :   if (version == EV_NONE)
      49                 :          0 :     return __libelf_version;
      50                 :            : 
      51         [ +  - ]:       6333 :   if (likely (version < EV_NUM))
      52                 :            :     {
      53                 :            :       /* Phew, we know this version.  */
      54                 :       6333 :       unsigned int last_version = __libelf_version;
      55                 :            : 
      56                 :            :       /* Store the new version.  */
      57                 :       6333 :       __libelf_version = version;
      58                 :            : 
      59                 :            :       /* Signal that the version is now initialized.  */
      60                 :       6333 :       __libelf_version_initialized = 1;
      61                 :            : 
      62                 :            :       /* And return the last version.  */
      63                 :       6333 :       return last_version;
      64                 :            :     }
      65                 :            : 
      66                 :            :   /* We cannot handle this version.  */
      67                 :          0 :   __libelf_seterrno (ELF_E_UNKNOWN_VERSION);
      68                 :       6333 :   return EV_NONE;
      69                 :            : }
      70                 :            : INTDEF(elf_version)