mirror of https://github.com/dzavalishin/oskit/
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
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/*
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* Copyright (c) 1996, 1998 University of Utah and the Flux Group.
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* All rights reserved.
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*
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* This file is part of the Flux OSKit. The OSKit is free software, also known
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* as "open source;" you can redistribute it and/or modify it under the terms
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* of the GNU General Public License (GPL), version 2, as published by the Free
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* Software Foundation (FSF). To explore alternate licensing terms, contact
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* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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*
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* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
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* received a copy of the GPL along with the OSKit; see the file COPYING. If
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* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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*/
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#include <oskit/anno.h>
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struct anno_entry *anno_find_lower(struct anno_table *tab, oskit_addr_t val1)
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{
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struct anno_entry *low = tab->start;
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struct anno_entry *high = tab->end;
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/*
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* If the annotation table didn't get initialized,
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* its probably because it has no entries in it,
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* so the search always fails.
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*/
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if (low == 0)
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return 0;
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/*
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* Before the first annotation, return zero.
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*/
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if (val1 < low->val1)
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return 0;
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while (1)
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{
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struct anno_entry *mid = low + (unsigned)(high - low) / 2;
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if (mid == low)
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return mid;
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if (val1 < mid->val1)
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high = mid;
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else
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low = mid;
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}
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}
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