136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
/* Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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struct entry
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{
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int val;
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const char *str;
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} arr[] =
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{
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{ 0, "zero" },
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{ 1, "one" },
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{ 2, "two" },
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{ 3, "three" },
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{ 4, "four" },
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{ 5, "five" },
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{ 6, "six" },
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{ 7, "seven" },
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{ 8, "eight" },
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{ 9, "nine" },
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{ 10, "ten" }
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};
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#define narr (sizeof (arr) / sizeof (arr[0]))
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static int
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comp (const void *p1, const void *p2)
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{
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struct entry *e1 = (struct entry *) p1;
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struct entry *e2 = (struct entry *) p2;
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return e1->val - e2->val;
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}
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int
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main (void)
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{
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int cnt;
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int result = 0;
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struct entry key;
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struct entry *res;
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for (cnt = 0; cnt < narr; ++cnt)
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{
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key.val = arr[cnt].val;
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res = (struct entry *) bsearch (&key, arr, narr, sizeof (arr[0]), comp);
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if (res == NULL)
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{
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printf ("entry %d not found\n", cnt);
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result = 1;
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}
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else if (res != &arr[cnt])
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{
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puts ("wrong entry returned");
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result = 1;
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}
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}
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/* And some special tests that shouldn't find any entry. */
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key.val = -1;
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res = (struct entry *) bsearch (&key, arr, narr, sizeof (arr[0]), comp);
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if (res != NULL)
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{
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puts ("found an entry that's not there");
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result = 1;
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}
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key.val = 11;
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res = (struct entry *) bsearch (&key, arr, narr, sizeof (arr[0]), comp);
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if (res != NULL)
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{
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puts ("found an entry that's not there");
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result = 1;
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}
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key.val = 11;
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res = (struct entry *) bsearch (&key, arr, 0, sizeof (arr[0]), comp);
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if (res != NULL)
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{
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puts ("found an entry that's not there");
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result = 1;
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}
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/* Now the array contains only one element - no entry should be found. */
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for (cnt = 0; cnt < narr; ++cnt)
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{
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key.val = arr[cnt].val;
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res = (struct entry *) bsearch (&key, &arr[5], 1, sizeof (arr[0]), comp);
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if (cnt == 5)
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{
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if (res == NULL)
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{
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printf ("entry %d not found\n", cnt);
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result = 1;
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}
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else if (res != &arr[cnt])
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{
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puts ("wrong entry returned");
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result = 1;
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}
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}
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else if (res != NULL)
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{
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puts ("found an entry that's not there");
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result = 1;
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}
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}
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if (result == 0)
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puts ("all OK");
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return result;
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}
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