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/* -*- buffer-read-only: t -*- vi: set ro: */
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/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
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* Copyright (C) 2008-2010 Free Software Foundation, Inc.
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* Written by Eric Blake and Bruno Haible
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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* This program 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
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "signature.h"
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SIGNATURE_CHECK (memchr, void *, (void const *, int, size_t));
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#include "zerosize-ptr.h"
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/* Calculating void * + int is not portable, so this wrapper converts
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to char * to make the tests easier to write. */
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#define MEMCHR (char *) memchr
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char *input = malloc (n);
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memset (input + 2, 'c', 1024);
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memset (input + 1026, 'd', n - 1028);
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/* Basic behavior tests. */
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ASSERT (MEMCHR (input, 'a', n) == input);
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ASSERT (MEMCHR (input, 'a', 0) == NULL);
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ASSERT (MEMCHR (zerosize_ptr (), 'a', 0) == NULL);
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ASSERT (MEMCHR (input, 'b', n) == input + 1);
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ASSERT (MEMCHR (input, 'c', n) == input + 2);
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ASSERT (MEMCHR (input, 'd', n) == input + 1026);
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ASSERT (MEMCHR (input + 1, 'a', n - 1) == input + n - 1);
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ASSERT (MEMCHR (input + 1, 'e', n - 1) == input + n - 2);
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ASSERT (MEMCHR (input, 'f', n) == NULL);
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ASSERT (MEMCHR (input, '\0', n) == NULL);
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/* Check that a very long haystack is handled quickly if the byte is
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found near the beginning. */
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size_t repeat = 10000;
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for (; repeat > 0; repeat--)
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ASSERT (MEMCHR (input, 'c', n) == input + 2);
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/* Alignment tests. */
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for (i = 0; i < 32; i++)
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for (j = 0; j < 256; j++)
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for (j = 0; j < 256; j++)
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ASSERT (MEMCHR (input + i, j, 256) == input + i + j);
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/* Check that memchr() does not read past the first occurrence of the
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byte being searched. See the Austin Group's clarification
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<http://www.opengroup.org/austin/docs/austin_454.txt>. */
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char *page_boundary = (char *) zerosize_ptr ();
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if (page_boundary != NULL)
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for (n = 1; n <= 500; n++)
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char *mem = page_boundary - n;
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memset (mem, 'X', n);
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ASSERT (MEMCHR (mem, 'U', n) == NULL);
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for (i = 0; i < n; i++)
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ASSERT (MEMCHR (mem, 'U', 4000) == mem + i);