text: /*	$NetBSD: win32os.c,v 1.6 2015/07/08 17:29:00 christos Exp $	*/
  
  /*
   * Copyright (C) 2004, 2007, 2013-2015  Internet Systems Consortium, Inc. ("ISC")
   * Copyright (C) 2002  Internet Software Consortium.
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
   * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
   * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
   * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
   * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
   * PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <windows.h>
  
  #ifndef TESTVERSION
  #include <isc/win32os.h>
  #else
  #include <stdio.h>
  #endif
  
  int
  isc_win32os_versioncheck(unsigned int major, unsigned int minor,
  			 unsigned int spmajor, unsigned int spminor)
  {
  	OSVERSIONINFOEX osVer;
  	DWORD typeMask;
  	ULONGLONG conditionMask;
  
  	memset(&osVer, 0, sizeof(OSVERSIONINFOEX));
  	osVer.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
  	typeMask = 0;
  	conditionMask = 0;
  
  	/* Optimistic: likely greater */
  	osVer.dwMajorVersion = major;
  	typeMask |= VER_MAJORVERSION;
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_MAJORVERSION,
  					    VER_GREATER);
  	osVer.dwMinorVersion = minor;
  	typeMask |= VER_MINORVERSION;
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_MINORVERSION,
  					    VER_GREATER);
  	osVer.wServicePackMajor = spmajor;
  	typeMask |= VER_SERVICEPACKMAJOR;
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_SERVICEPACKMAJOR,
  					    VER_GREATER);
  	osVer.wServicePackMinor = spminor;
  	typeMask |= VER_SERVICEPACKMINOR;
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_SERVICEPACKMINOR,
  					    VER_GREATER);
  	if (VerifyVersionInfo(&osVer, typeMask, conditionMask))
  		return (1);
  
  	/* Failed: retry with equal */
  	conditionMask = 0;
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_MAJORVERSION,
  					    VER_EQUAL);
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_MINORVERSION,
  					    VER_EQUAL);
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_SERVICEPACKMAJOR,
  					    VER_EQUAL);
  	conditionMask = VerSetConditionMask(conditionMask,
  					    VER_SERVICEPACKMINOR,
  					    VER_EQUAL);
  	if (VerifyVersionInfo(&osVer, typeMask, conditionMask))
  		return (0);
  	else
  		return (-1);
  }
  
  #ifdef TESTVERSION
  int
  main(int argc, char **argv) {
  	unsigned int major = 0;
  	unsigned int minor = 0;
  	unsigned int spmajor = 0;
  	unsigned int spminor = 0;
  	int ret;
  
  	if (argc > 1) {
  		--argc;
  		++argv;
  		major = (unsigned int) atoi(argv[0]);
  	}
  	if (argc > 1) {
  		--argc;
  		++argv;
  		minor = (unsigned int) atoi(argv[0]);
  	}
  	if (argc > 1) {
  		--argc;
  		++argv;
  		spmajor = (unsigned int) atoi(argv[0]);
  	}
  	if (argc > 1) {
  		--argc;
  		++argv;
  		spminor = (unsigned int) atoi(argv[0]);
  	}
  
  	ret = isc_win32os_versioncheck(major, minor, spmajor, spminor);
  
  	printf("%s major %u minor %u SP major %u SP minor %u\n",
  	       ret > 0 ? "greater" : (ret == 0 ? "equal" : "less"),
  	       major, minor, spmajor, spminor);
  	return (ret);
  }
  #endif
  