| |
| //===-- Unittests for swab ------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/unistd/swab.h" |
| |
| #include "src/string/string_utils.h" |
| #include "test/UnitTest/Test.h" |
| |
| TEST(LlvmLibcSwabTest, NegativeSizeIsNoOp) { |
| const char *from = "abc"; |
| char to[4] = {'x', 'y', 'z', '\0'}; |
| LIBC_NAMESPACE::swab(from, to, -1); |
| ASSERT_STREQ(to, "xyz"); |
| } |
| |
| TEST(LlvmLibcSwabTest, ZeroSizeIsNoOp) { |
| const char *from = "abc"; |
| char to[4] = {'x', 'y', 'z', '\0'}; |
| LIBC_NAMESPACE::swab(from, to, 0); |
| ASSERT_STREQ(to, "xyz"); |
| } |
| |
| TEST(LlvmLibcSwabTest, SingleByteIsNoOp) { |
| char from[] = {'a'}; |
| char to[4] = {'x', 'y', 'z', '\0'}; |
| LIBC_NAMESPACE::swab(from, to, sizeof(from)); |
| ASSERT_STREQ(to, "xyz"); |
| } |
| |
| TEST(LlvmLibcSwabTest, NullPtrsAreNotDeRefedIfNIsLessThanTwo) { |
| // This test passes if a crash does not happen |
| LIBC_NAMESPACE::swab(nullptr, nullptr, -1); |
| LIBC_NAMESPACE::swab(nullptr, nullptr, 0); |
| LIBC_NAMESPACE::swab(nullptr, nullptr, 1); |
| } |
| |
| TEST(LlvmLibcSwabTest, BytesAreSwappedWithEvenN) { |
| { |
| const char *from = "ab"; |
| char to[3] = {}; |
| LIBC_NAMESPACE::swab(from, to, |
| LIBC_NAMESPACE::internal::string_length(from)); |
| ASSERT_STREQ(to, "ba"); |
| } |
| { |
| const char *from = "abcd"; |
| char to[5] = {}; |
| LIBC_NAMESPACE::swab(from, to, |
| LIBC_NAMESPACE::internal::string_length(from)); |
| ASSERT_STREQ(to, "badc"); |
| } |
| { |
| const char *from = "aAaAaA"; |
| char to[7] = {}; |
| LIBC_NAMESPACE::swab(from, to, |
| LIBC_NAMESPACE::internal::string_length(from)); |
| ASSERT_STREQ(to, "AaAaAa"); |
| } |
| } |
| |
| TEST(LlvmLibcSwabTest, LastByteIgnoredWithOddN) { |
| { |
| const char *from = "aba"; |
| char to[3] = {}; |
| LIBC_NAMESPACE::swab(from, to, |
| LIBC_NAMESPACE::internal::string_length(from)); |
| ASSERT_STREQ(to, "ba"); |
| } |
| { |
| const char *from = "abcde"; |
| char to[5] = {}; |
| LIBC_NAMESPACE::swab(from, to, |
| LIBC_NAMESPACE::internal::string_length(from)); |
| ASSERT_STREQ(to, "badc"); |
| } |
| { |
| const char *from = "aAaAaAx"; |
| char to[7] = {}; |
| LIBC_NAMESPACE::swab(from, to, |
| LIBC_NAMESPACE::internal::string_length(from)); |
| ASSERT_STREQ(to, "AaAaAa"); |
| } |
| } |