| 46 | } |
| 47 | |
| 48 | std::unique_ptr<unsigned char[]> decodeBase64Data(const std::string& string, int& size) { |
| 49 | int groups = string.size() / 4; |
| 50 | int write_index = 0; |
| 51 | |
| 52 | std::unique_ptr<unsigned char[]> result = std::make_unique<unsigned char[]>(groups * 3); |
| 53 | auto base64_value = [](char character) { |
| 54 | if (character >= 'A' && character <= 'Z') |
| 55 | return character - 'A'; |
| 56 | if (character >= 'a' && character <= 'z') |
| 57 | return character - 'a' + 26; |
| 58 | if (character >= '0' && character <= '9') |
| 59 | return character - '0' + 52; |
| 60 | if (character == '+') |
| 61 | return 62; |
| 62 | if (character == '/') |
| 63 | return 63; |
| 64 | if (character == '=') |
| 65 | return 64; |
| 66 | |
| 67 | return 65; |
| 68 | }; |
| 69 | |
| 70 | for (size_t i = 0; i + 3 < string.length(); i += 4) { |
| 71 | unsigned char value0 = base64_value(string[i]); |
| 72 | unsigned char value1 = base64_value(string[i + 1]); |
| 73 | unsigned char value2 = base64_value(string[i + 2]); |
| 74 | unsigned char value3 = base64_value(string[i + 3]); |
| 75 | |
| 76 | if (value0 > 64 || value1 > 64 || value2 > 64 || value3 > 64) |
| 77 | return nullptr; |
| 78 | |
| 79 | result[write_index++] = (value0 << 2) | (value1 >> 4); |
| 80 | if (value2 != 64) { |
| 81 | result[write_index++] = (value1 << 4) | (value2 >> 2); |
| 82 | |
| 83 | if (value3 != 64) |
| 84 | result[write_index++] = (value2 << 6) | value3; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | size = write_index; |
| 89 | return result; |
| 90 | } |
| 91 | |
| 92 | String String::toLower() const { |
| 93 | std::u32string result = string_; |
no test coverage detected