From 0fb00d8330a844be3028b76fbdba97cc9281f897 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Wed, 19 Apr 2023 17:59:58 +0200 Subject: wcsncmp: Add tests. * tests/test-wcsncmp.c: New file, based on tests/unistr/test-strncmp.h and tests/test-wcscmp.c. * modules/wcsncmp-tests: New file. --- ChangeLog | 5 ++ modules/wcsncmp-tests | 12 ++++ tests/test-wcsncmp.c | 182 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 199 insertions(+) create mode 100644 modules/wcsncmp-tests create mode 100644 tests/test-wcsncmp.c diff --git a/ChangeLog b/ChangeLog index 46cfb56ea2..70ce8dab28 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,10 @@ 2023-04-19 Bruno Haible + wcsncmp: Add tests. + * tests/test-wcsncmp.c: New file, based on tests/unistr/test-strncmp.h + and tests/test-wcscmp.c. + * modules/wcsncmp-tests: New file. + wcsncmp: Work around two ISO C compliance bugs on several platforms. * lib/wchar.in.h (wcsncmp): Consider REPLACE_WCSNCMP. * lib/wcsncmp-impl.h (wcsncmp): Don't assume that the two wide diff --git a/modules/wcsncmp-tests b/modules/wcsncmp-tests new file mode 100644 index 0000000000..33f9f374e8 --- /dev/null +++ b/modules/wcsncmp-tests @@ -0,0 +1,12 @@ +Files: +tests/test-wcsncmp.c +tests/signature.h +tests/macros.h + +Depends-on: + +configure.ac: + +Makefile.am: +TESTS += test-wcsncmp +check_PROGRAMS += test-wcsncmp diff --git a/tests/test-wcsncmp.c b/tests/test-wcsncmp.c new file mode 100644 index 0000000000..41c6c00706 --- /dev/null +++ b/tests/test-wcsncmp.c @@ -0,0 +1,182 @@ +/* Test of wcsncmp() function. + Copyright (C) 2010-2023 Free Software Foundation, Inc. + + 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 . */ + +/* Written by Bruno Haible , 2023. */ + +#include + +#include + +#include "signature.h" +SIGNATURE_CHECK (wcsncmp, int, (const wchar_t *, const wchar_t *, size_t)); + +#include "macros.h" + +int +main (int argc, char *argv[]) +{ + /* Test simple cases. */ + { + static const wchar_t input1[] = { 0 }; + static const wchar_t input2[] = { 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) == 0); + ASSERT (wcsncmp (input1, input2, 1000000) == 0); + } + { + static const wchar_t input1[] = { 0 }; + static const wchar_t input2[] = { 'f', 'o', 'o', 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) < 0); + ASSERT (wcsncmp (input2, input1, 1) > 0); + ASSERT (wcsncmp (input1, input2, 3) < 0); + ASSERT (wcsncmp (input2, input1, 3) > 0); + ASSERT (wcsncmp (input1, input2, 4) < 0); + ASSERT (wcsncmp (input2, input1, 4) > 0); + ASSERT (wcsncmp (input1, input2, 1000000) < 0); + ASSERT (wcsncmp (input2, input1, 1000000) > 0); + } + { + static const wchar_t input1[] = { 'f', 'o', 'o', 0 }; + static const wchar_t input2[] = { 'f', 'o', 'o', 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) == 0); + ASSERT (wcsncmp (input1, input2, 2) == 0); + ASSERT (wcsncmp (input1, input2, 3) == 0); + ASSERT (wcsncmp (input1, input2, 4) == 0); + ASSERT (wcsncmp (input1, input2, 1000000) == 0); + } + { + static const wchar_t input1[] = { 'f', 'o', 'o', 0 }; + static const wchar_t input2[] = { 'b', 'a', 'r', 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) > 0); + ASSERT (wcsncmp (input2, input1, 1) < 0); + ASSERT (wcsncmp (input1, input2, 2) > 0); + ASSERT (wcsncmp (input2, input1, 2) < 0); + ASSERT (wcsncmp (input1, input2, 1000000) > 0); + ASSERT (wcsncmp (input2, input1, 1000000) < 0); + } + { + static const wchar_t input1[] = { 'f', 'o', 'o', 0 }; + static const wchar_t input2[] = { 'f', 'o', 'o', 'b', 'a', 'r', 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) == 0); + ASSERT (wcsncmp (input1, input2, 2) == 0); + ASSERT (wcsncmp (input1, input2, 3) == 0); + ASSERT (wcsncmp (input1, input2, 4) < 0); + ASSERT (wcsncmp (input2, input1, 4) > 0); + ASSERT (wcsncmp (input1, input2, 1000000) < 0); + ASSERT (wcsncmp (input2, input1, 1000000) > 0); + } + { + static const wchar_t input1[] = { 'o', 'o', 'm', 'p', 'h', 0 }; + static const wchar_t input2[] = { 'o', 'o', 'p', 's', 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) == 0); + ASSERT (wcsncmp (input1, input2, 2) == 0); + ASSERT (wcsncmp (input1, input2, 3) < 0); + ASSERT (wcsncmp (input2, input1, 3) > 0); + ASSERT (wcsncmp (input1, input2, 4) < 0); + ASSERT (wcsncmp (input2, input1, 4) > 0); + ASSERT (wcsncmp (input1, input2, 5) < 0); + ASSERT (wcsncmp (input2, input1, 5) > 0); + ASSERT (wcsncmp (input1, input2, 6) < 0); + ASSERT (wcsncmp (input2, input1, 6) > 0); + ASSERT (wcsncmp (input1, input2, 1000000) < 0); + ASSERT (wcsncmp (input2, input1, 1000000) > 0); + } + + /* ISO C requires wcsncmp to work with all wchar_t values. + ISO C 17 § 7.29.4.4 says: + "Unless explicitly stated otherwise, the functions described in this + subclause order two wide characters the same way as two integers of + the underlying integer type designated by wchar_t." */ + { + static const wchar_t input1[] = { (wchar_t) 0x76547654, 0 }; + static const wchar_t input2[] = { (wchar_t) 0x9abc9abc, 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + if ((wchar_t)-1 < 0) + { + /* wchar_t is signed. */ + ASSERT (wcsncmp (input1, input2, 1) > 0); + ASSERT (wcsncmp (input2, input1, 1) < 0); + ASSERT (wcsncmp (input1, input2, 2) > 0); + ASSERT (wcsncmp (input2, input1, 2) < 0); + ASSERT (wcsncmp (input1, input2, 1000000) > 0); + ASSERT (wcsncmp (input2, input1, 1000000) < 0); + } + else + { + /* wchar_t is unsigned. */ + ASSERT (wcsncmp (input1, input2, 1) < 0); + ASSERT (wcsncmp (input2, input1, 1) > 0); + ASSERT (wcsncmp (input1, input2, 2) < 0); + ASSERT (wcsncmp (input2, input1, 2) > 0); + ASSERT (wcsncmp (input1, input2, 1000000) < 0); + ASSERT (wcsncmp (input2, input1, 1000000) > 0); + } + } + { + static const wchar_t input1[] = { (wchar_t) 0x9abc9abc, 0 }; + static const wchar_t input2[] = { (wchar_t) 0x9bdf9bdf, 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) < 0); + ASSERT (wcsncmp (input2, input1, 1) > 0); + ASSERT (wcsncmp (input1, input2, 2) < 0); + ASSERT (wcsncmp (input2, input1, 2) > 0); + ASSERT (wcsncmp (input1, input2, 1000000) < 0); + ASSERT (wcsncmp (input2, input1, 1000000) > 0); + } + + /* Comparing a negative wchar_t value against a null wchar_t. + ISO C 17 § 7.29.4.4.1 says: + "The wcsncmp function compares the wide string pointed to by s1 to + the wide string pointed to by s2." + ISO C 17 § 7.1.1 defines the term "wide string": + "A wide string is a contiguous sequence of wide characters terminated + by and including the first null wide character." + This means that the comparison extends up to and *including* the first + null wchar_t. */ + { + static const wchar_t input1[] = { (wchar_t) 'x', 0 }; + static const wchar_t input2[] = { (wchar_t) 'x', (wchar_t) 0x9abc9abc, 0 }; + ASSERT (wcsncmp (input1, input2, 0) == 0); + ASSERT (wcsncmp (input1, input2, 1) == 0); + if ((wchar_t)-1 < 0) + { + /* wchar_t is signed. */ + ASSERT (wcsncmp (input1, input2, 2) > 0); + ASSERT (wcsncmp (input2, input1, 2) < 0); + ASSERT (wcsncmp (input1, input2, 3) > 0); + ASSERT (wcsncmp (input2, input1, 3) < 0); + ASSERT (wcsncmp (input1, input2, 1000000) > 0); + ASSERT (wcsncmp (input2, input1, 1000000) < 0); + } + else + { + /* wchar_t is unsigned. */ + ASSERT (wcsncmp (input1, input2, 2) < 0); + ASSERT (wcsncmp (input2, input1, 2) > 0); + ASSERT (wcsncmp (input1, input2, 3) < 0); + ASSERT (wcsncmp (input2, input1, 3) > 0); + ASSERT (wcsncmp (input1, input2, 1000000) < 0); + ASSERT (wcsncmp (input2, input1, 1000000) > 0); + } + } + + return 0; +} -- cgit v1.2.1