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dllcheck.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1997-2010 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * Glenn Fowler
 * AT&T Research
 */

#include "dlllib.h"

/*
 * check if dll on path has plugin version >= ver
 * 1 returned on success, 0 on failure
 */

extern int
dllcheck(void* dll, const char* path, unsigned long ver)
{
      unsigned long           v;
      Dll_plugin_version_f    pvf;

      state.error = 0;
      if (ver)
      {
            if (!(pvf = (Dll_plugin_version_f)dlllook(dll, "plugin_version")))
            {
                  state.error = 1;
                  sfsprintf(state.errorbuf, sizeof(state.errorbuf), "plugin_version() not found");
                  errorf("dll", NiL, 1, "%s: %s", path, state.errorbuf);
                  return 0;
            }
            if ((v = (*pvf)()) < ver)
            {
                  state.error = 1;
                  sfsprintf(state.errorbuf, sizeof(state.errorbuf), "plugin version %lu older than caller %lu", v, ver);
                  errorf("dll", NiL, 1, "%s: %s", path, state.errorbuf);
                  return 0;
            }
      }
      return 1;
}

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