88 lines · cpp
1//===-- Unittests for a64l ------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/stdlib/a64l.h"10#include "test/UnitTest/Test.h"11 12TEST(LlvmLibcA64lTest, EmptyString) { ASSERT_EQ(LIBC_NAMESPACE::a64l(""), 0l); }13TEST(LlvmLibcA64lTest, FullString) {14 ASSERT_EQ(LIBC_NAMESPACE::a64l("AbC12/"), 1141696972l);15}16 17constexpr char B64_CHARS[64] = {18 '.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',19 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',20 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a',21 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',22 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',23};24 25TEST(LlvmLibcA64lTest, OneCharacter) {26 char example_str[2] = {'\0', '\0'};27 28 for (size_t i = 0; i < 64; ++i) {29 example_str[0] = B64_CHARS[i];30 ASSERT_EQ(LIBC_NAMESPACE::a64l(example_str), static_cast<long>(i));31 }32}33 34TEST(LlvmLibcA64lTest, TwoCharacters) {35 char example_str[3] = {'\0', '\0', '\0'};36 37 for (size_t first = 0; first < 64; ++first) {38 example_str[0] = B64_CHARS[first];39 for (size_t second = 0; second < 64; ++second) {40 example_str[1] = B64_CHARS[second];41 42 ASSERT_EQ(LIBC_NAMESPACE::a64l(example_str),43 static_cast<long>(first + (second * 64)));44 }45 }46}47 48TEST(LlvmLibcA64lTest, FiveSameCharacters) {49 // Technically the last digit can be parsed to give the last two bits. Not50 // handling that here.51 char example_str[6] = {52 '\0', '\0', '\0', '\0', '\0', '\0',53 };54 55 // set every 6th bit56 const long BASE_NUM = 0b1000001000001000001000001;57 58 for (size_t char_val = 0; char_val < 64; ++char_val) {59 for (size_t i = 0; i < 5; ++i)60 example_str[i] = B64_CHARS[char_val];61 62 const long expected_result = BASE_NUM * char_val;63 64 ASSERT_EQ(LIBC_NAMESPACE::a64l(example_str), expected_result);65 }66}67 68TEST(LlvmLibcA64lTest, OneOfSixCharacters) {69 char example_str[7] = {'\0', '\0', '\0', '\0', '\0', '\0', '\0'};70 71 for (size_t cur_char = 0; cur_char < 6; ++cur_char) {72 // clear the string, set all the chars to b64(0)73 for (size_t i = 0; i < 6; ++i)74 example_str[i] = B64_CHARS[0];75 76 for (size_t char_val = 0; char_val < 64; ++char_val) {77 example_str[cur_char] = B64_CHARS[char_val];78 79 // Need to limit to 32 bits, since that's what the standard says the80 // function does.81 const long expected_result =82 static_cast<int32_t>(char_val << (6 * cur_char));83 84 ASSERT_EQ(LIBC_NAMESPACE::a64l(example_str), expected_result);85 }86 }87}88