From 29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:21:29 +0200 Subject: Adding upstream version 1:0.1.9998svn3589+dfsg. Signed-off-by: Daniel Baumann --- src/grep/gnulib-tests/test-memrchr.c | 98 ++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 src/grep/gnulib-tests/test-memrchr.c (limited to 'src/grep/gnulib-tests/test-memrchr.c') diff --git a/src/grep/gnulib-tests/test-memrchr.c b/src/grep/gnulib-tests/test-memrchr.c new file mode 100644 index 0000000..9df55c1 --- /dev/null +++ b/src/grep/gnulib-tests/test-memrchr.c @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2008-2021 Free Software Foundation, Inc. + * Written by Eric Blake and Bruno Haible + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ + +#include + +#include + +#include "signature.h" +SIGNATURE_CHECK (memrchr, void *, (void const *, int, size_t)); + +#include + +#include "zerosize-ptr.h" +#include "macros.h" + +/* Work around GCC bug 101494. */ +#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__) +# pragma GCC diagnostic ignored "-Wmaybe-uninitialized" +#endif + +/* Calculating void * + int is not portable, so this wrapper converts + to char * to make the tests easier to write. */ +#define MEMRCHR (char *) memrchr + +int +main (void) +{ + size_t n = 0x100000; + char *input = malloc (n); + ASSERT (input); + + input[n - 1] = 'a'; + input[n - 2] = 'b'; + memset (input + n - 1026, 'c', 1024); + memset (input + 2, 'd', n - 1028); + input[1] = 'e'; + input[0] = 'a'; + + /* Basic behavior tests. */ + ASSERT (MEMRCHR (input, 'a', n) == input + n - 1); + + ASSERT (MEMRCHR (input, 'a', 0) == NULL); + void *page_boundary = zerosize_ptr (); + if (page_boundary) + ASSERT (MEMRCHR (page_boundary, 'a', 0) == NULL); + + ASSERT (MEMRCHR (input, 'b', n) == input + n - 2); + ASSERT (MEMRCHR (input, 'c', n) == input + n - 3); + ASSERT (MEMRCHR (input, 'd', n) == input + n - 1027); + + ASSERT (MEMRCHR (input, 'a', n - 1) == input); + ASSERT (MEMRCHR (input, 'e', n - 1) == input + 1); + + ASSERT (MEMRCHR (input, 'f', n) == NULL); + ASSERT (MEMRCHR (input, '\0', n) == NULL); + + /* Check that a very long haystack is handled quickly if the byte is + found near the end. */ + { + size_t repeat = 10000; + for (; repeat > 0; repeat--) + { + ASSERT (MEMRCHR (input, 'c', n) == input + n - 3); + } + } + + /* Alignment tests. */ + { + int i, j; + for (i = 0; i < 32; i++) + { + for (j = 0; j < 256; j++) + input[i + j] = j; + for (j = 0; j < 256; j++) + { + ASSERT (MEMRCHR (input + i, j, 256) == input + i + j); + } + } + } + + free (input); + + return 0; +} -- cgit v1.2.3