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https://github.com/mudita/MuditaOS.git
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9b7d5be07a
Fix of the issue that only files with extension in lowercase were detected and listed in the music player's library. Additionally code cleanup.
87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Copyright (c) 2017-2022, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#include "Utils.hpp"
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#include <crc32.h>
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#include <ctime>
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#include <filesystem>
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#include <random>
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namespace utils::filesystem
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{
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namespace
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{
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inline constexpr auto crc_buf_len = 1024;
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} // namespace
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unsigned long computeFileCRC32(std::FILE *file) noexcept
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{
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auto buf = std::make_unique<unsigned char[]>(crc_buf_len);
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CRC32 digestCrc32;
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while (!std::feof(file)) {
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size_t dataLen = std::fread(buf.get(), 1, crc_buf_len, file);
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if (dataLen == 0) {
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break;
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}
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digestCrc32.add(buf.get(), dataLen);
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}
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return digestCrc32.getHashValue();
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}
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std::string getline(std::FILE *stream, uint32_t length) noexcept
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{
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std::uint32_t currentPosition = std::ftell(stream);
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// allocate memory to read number of signs defined by length param. Size of buffer is increased by 1 to add
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// string's null terminator.
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auto buffer = std::make_unique<char[]>(length + 1);
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std::uint32_t bytesRead = std::fread(buffer.get(), 1, length, stream);
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// search buffer for /n sign
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constexpr auto newLineSign = 0x0A;
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for (std::uint32_t i = 0; i < bytesRead; ++i) {
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if (buffer[i] == newLineSign) {
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buffer[i] = 0;
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std::fseek(stream, currentPosition + i + 1, SEEK_SET);
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break;
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}
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}
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std::string ret = std::string(buffer.get());
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return ret;
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}
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} // namespace utils::filesystem
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namespace utils
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{
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std::string generateRandomId(std::size_t length) noexcept
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{
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if (!length)
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return {};
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const std::string CHARACTERS("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
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auto random_device = std::make_unique<std::random_device>();
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auto generator = std::make_unique<std::mt19937>((*random_device)());
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generator->seed(std::time(nullptr));
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std::uniform_int_distribution<> distribution(0, CHARACTERS.size() - 1);
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std::string random_string(length, '\0');
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for (std::size_t i = 0; i < length; ++i) {
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random_string[i] = CHARACTERS[distribution(*generator)];
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}
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return random_string;
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}
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} // namespace utils
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