| 1 | //===-- Unittests for tolower----------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/__support/CPP/span.h" |
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| 10 | #include "src/ctype/tolower.h" |
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| 11 | |
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| 12 | #include "test/UnitTest/Test.h" |
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| 13 | |
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| 14 | namespace { |
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| 15 | |
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| 16 | // TODO: Merge the ctype tests using this framework. |
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| 17 | // Invariant: UPPER_ARR and LOWER_ARR are both the complete alphabet in the same |
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| 18 | // order. |
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| 19 | constexpr char UPPER_ARR[] = { |
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| 20 | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', |
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| 21 | 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', |
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| 22 | }; |
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| 23 | constexpr char LOWER_ARR[] = { |
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| 24 | 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', |
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| 25 | 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', |
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| 26 | }; |
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| 27 | |
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| 28 | static_assert( |
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| 29 | sizeof(UPPER_ARR) == sizeof(LOWER_ARR), |
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| 30 | "There must be the same number of uppercase and lowercase letters." ); |
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| 31 | |
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| 32 | int span_index(int ch, LIBC_NAMESPACE::cpp::span<const char> arr) { |
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| 33 | for (size_t i = 0; i < arr.size(); ++i) |
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| 34 | if (static_cast<int>(arr[i]) == ch) |
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| 35 | return static_cast<int>(i); |
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| 36 | return -1; |
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| 37 | } |
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| 38 | |
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| 39 | } // namespace |
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| 40 | |
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| 41 | TEST(LlvmLibcToLower, SimpleTest) { |
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| 42 | EXPECT_EQ(LIBC_NAMESPACE::tolower('a'), int('a')); |
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| 43 | EXPECT_EQ(LIBC_NAMESPACE::tolower('B'), int('b')); |
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| 44 | EXPECT_EQ(LIBC_NAMESPACE::tolower('3'), int('3')); |
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| 45 | |
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| 46 | EXPECT_EQ(LIBC_NAMESPACE::tolower(' '), int(' ')); |
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| 47 | EXPECT_EQ(LIBC_NAMESPACE::tolower('?'), int('?')); |
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| 48 | EXPECT_EQ(LIBC_NAMESPACE::tolower('\0'), int('\0')); |
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| 49 | EXPECT_EQ(LIBC_NAMESPACE::tolower(-1), int(-1)); |
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| 50 | } |
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| 51 | |
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| 52 | TEST(LlvmLibcToLower, DefaultLocale) { |
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| 53 | for (int ch = -255; ch < 255; ++ch) { |
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| 54 | int char_index = span_index(ch, UPPER_ARR); |
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| 55 | if (char_index != -1) |
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| 56 | EXPECT_EQ(LIBC_NAMESPACE::tolower(ch), |
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| 57 | static_cast<int>(LOWER_ARR[char_index])); |
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| 58 | else |
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| 59 | EXPECT_EQ(LIBC_NAMESPACE::tolower(ch), ch); |
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| 60 | } |
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| 61 | } |
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| 62 | |
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