60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* $NetBSD: efidev.c,v 1.1 2018/08/26 21:28:18 jmcneill Exp $ */
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/* $OpenBSD: efiboot.c,v 1.28 2017/11/25 19:02:07 patrick Exp $ */
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/*
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* Copyright (c) 2015 YASUOKA Masahiko <yasuoka@yasuoka.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "efiboot.h"
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/*
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* Determine the number of nodes up to, but not including, the first
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* node of the specified type.
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*/
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int
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efi_device_path_depth(EFI_DEVICE_PATH *dp, int dptype)
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{
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int i;
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for (i = 0; !IsDevicePathEnd(dp); dp = NextDevicePathNode(dp), i++) {
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if (DevicePathType(dp) == dptype)
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return (i);
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}
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return (-1);
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}
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int
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efi_device_path_ncmp(EFI_DEVICE_PATH *dpa, EFI_DEVICE_PATH *dpb, int deptn)
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{
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int i, cmp;
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for (i = 0; i < deptn; i++) {
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if (IsDevicePathEnd(dpa) || IsDevicePathEnd(dpb))
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return ((IsDevicePathEnd(dpa) && IsDevicePathEnd(dpb))
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? 0 : (IsDevicePathEnd(dpa))? -1 : 1);
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cmp = DevicePathNodeLength(dpa) - DevicePathNodeLength(dpb);
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if (cmp)
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return (cmp);
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cmp = memcmp(dpa, dpb, DevicePathNodeLength(dpa));
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if (cmp)
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return (cmp);
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dpa = NextDevicePathNode(dpa);
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dpb = NextDevicePathNode(dpb);
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}
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return (0);
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}
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