105 lines
3.8 KiB
C++
105 lines
3.8 KiB
C++
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// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/stdlib/strlcpy.h"
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#include <string.h>
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#include <wchar.h>
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#include <algorithm>
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#include <string>
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#include "base/cxx17_backports.h"
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#include "base/format_macros.h"
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#include "base/strings/stringprintf.h"
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#include "gtest/gtest.h"
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namespace crashpad {
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namespace test {
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namespace {
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size_t C16Len(const char16_t* s) {
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return std::char_traits<char16_t>::length(s);
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}
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int C16Memcmp(const char16_t* s1, const char16_t* s2, size_t n) {
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return std::char_traits<char16_t>::compare(s1, s2, n);
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}
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TEST(strlcpy, c16lcpy) {
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// Use a destination buffer that’s larger than the length passed to c16lcpy.
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// The unused portion is a guard area that must not be written to.
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struct TestBuffer {
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char16_t lead_guard[64];
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char16_t data[128];
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char16_t trail_guard[64];
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};
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TestBuffer expected_untouched;
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memset(&expected_untouched, 0xa5, sizeof(expected_untouched));
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// Test with M, é, Ā, ő, and Ḙ. This is a mix of characters that have zero and
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// nonzero low and high bytes.
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static constexpr char16_t test_characters[] = {
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0x4d, 0xe9, 0x100, 0x151, 0x1e18};
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for (size_t index = 0; index < base::size(test_characters); ++index) {
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char16_t test_character = test_characters[index];
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SCOPED_TRACE(base::StringPrintf(
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"character index %" PRIuS ", character 0x%x", index, test_character));
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for (size_t length = 0; length < 256; ++length) {
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SCOPED_TRACE(
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base::StringPrintf("index %" PRIuS, length));
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std::u16string test_string(length, test_character);
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TestBuffer destination;
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memset(&destination, 0xa5, sizeof(destination));
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EXPECT_EQ(c16lcpy(destination.data,
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test_string.c_str(),
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base::size(destination.data)),
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length);
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// Make sure that the destination buffer is NUL-terminated, and that as
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// much of the test string was copied as could fit.
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size_t expected_destination_length =
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std::min(length, base::size(destination.data) - 1);
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EXPECT_EQ(destination.data[expected_destination_length], '\0');
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EXPECT_EQ(C16Len(destination.data), expected_destination_length);
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EXPECT_TRUE(C16Memcmp(test_string.c_str(),
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destination.data,
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expected_destination_length) == 0);
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// Make sure that the portion of the destination buffer that was not used
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// was not touched. This includes the guard areas and the unused portion
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// of the buffer passed to c16lcpy.
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EXPECT_TRUE(C16Memcmp(expected_untouched.lead_guard,
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destination.lead_guard,
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base::size(destination.lead_guard)) == 0);
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size_t expected_untouched_length =
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base::size(destination.data) - expected_destination_length - 1;
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EXPECT_TRUE(C16Memcmp(expected_untouched.data,
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&destination.data[expected_destination_length + 1],
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expected_untouched_length) == 0);
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EXPECT_TRUE(C16Memcmp(expected_untouched.trail_guard,
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destination.trail_guard,
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base::size(destination.trail_guard)) == 0);
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}
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}
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}
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} // namespace
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} // namespace test
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} // namespace crashpad
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