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efidev.c revision 1.1.2.2 
      1  1.1.2.2  pgoyette /*	$NetBSD: efidev.c,v 1.1.2.2 2018/09/06 06:56:47 pgoyette Exp $	*/
      2  1.1.2.2  pgoyette /*	$OpenBSD: efiboot.c,v 1.28 2017/11/25 19:02:07 patrick Exp $	*/
      3  1.1.2.2  pgoyette 
      4  1.1.2.2  pgoyette /*
      5  1.1.2.2  pgoyette  * Copyright (c) 2015 YASUOKA Masahiko <yasuoka (at) yasuoka.net>
      6  1.1.2.2  pgoyette  *
      7  1.1.2.2  pgoyette  * Permission to use, copy, modify, and distribute this software for any
      8  1.1.2.2  pgoyette  * purpose with or without fee is hereby granted, provided that the above
      9  1.1.2.2  pgoyette  * copyright notice and this permission notice appear in all copies.
     10  1.1.2.2  pgoyette  *
     11  1.1.2.2  pgoyette  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12  1.1.2.2  pgoyette  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  1.1.2.2  pgoyette  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14  1.1.2.2  pgoyette  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  1.1.2.2  pgoyette  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  1.1.2.2  pgoyette  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17  1.1.2.2  pgoyette  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  1.1.2.2  pgoyette  */
     19  1.1.2.2  pgoyette 
     20  1.1.2.2  pgoyette #include "efiboot.h"
     21  1.1.2.2  pgoyette 
     22  1.1.2.2  pgoyette /*
     23  1.1.2.2  pgoyette  * Determine the number of nodes up to, but not including, the first
     24  1.1.2.2  pgoyette  * node of the specified type.
     25  1.1.2.2  pgoyette  */
     26  1.1.2.2  pgoyette int
     27  1.1.2.2  pgoyette efi_device_path_depth(EFI_DEVICE_PATH *dp, int dptype)
     28  1.1.2.2  pgoyette {
     29  1.1.2.2  pgoyette 	int	i;
     30  1.1.2.2  pgoyette 
     31  1.1.2.2  pgoyette 	for (i = 0; !IsDevicePathEnd(dp); dp = NextDevicePathNode(dp), i++) {
     32  1.1.2.2  pgoyette 		if (DevicePathType(dp) == dptype)
     33  1.1.2.2  pgoyette 			return (i);
     34  1.1.2.2  pgoyette 	}
     35  1.1.2.2  pgoyette 
     36  1.1.2.2  pgoyette 	return (-1);
     37  1.1.2.2  pgoyette }
     38  1.1.2.2  pgoyette 
     39  1.1.2.2  pgoyette int
     40  1.1.2.2  pgoyette efi_device_path_ncmp(EFI_DEVICE_PATH *dpa, EFI_DEVICE_PATH *dpb, int deptn)
     41  1.1.2.2  pgoyette {
     42  1.1.2.2  pgoyette 	int	 i, cmp;
     43  1.1.2.2  pgoyette 
     44  1.1.2.2  pgoyette 	for (i = 0; i < deptn; i++) {
     45  1.1.2.2  pgoyette 		if (IsDevicePathEnd(dpa) || IsDevicePathEnd(dpb))
     46  1.1.2.2  pgoyette 			return ((IsDevicePathEnd(dpa) && IsDevicePathEnd(dpb))
     47  1.1.2.2  pgoyette 			    ? 0 : (IsDevicePathEnd(dpa))? -1 : 1);
     48  1.1.2.2  pgoyette 		cmp = DevicePathNodeLength(dpa) - DevicePathNodeLength(dpb);
     49  1.1.2.2  pgoyette 		if (cmp)
     50  1.1.2.2  pgoyette 			return (cmp);
     51  1.1.2.2  pgoyette 		cmp = memcmp(dpa, dpb, DevicePathNodeLength(dpa));
     52  1.1.2.2  pgoyette 		if (cmp)
     53  1.1.2.2  pgoyette 			return (cmp);
     54  1.1.2.2  pgoyette 		dpa = NextDevicePathNode(dpa);
     55  1.1.2.2  pgoyette 		dpb = NextDevicePathNode(dpb);
     56  1.1.2.2  pgoyette 	}
     57  1.1.2.2  pgoyette 
     58  1.1.2.2  pgoyette 	return (0);
     59  1.1.2.2  pgoyette }
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