mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-07 06:00:16 +02:00
Ryan Houdek
2c31080fd4
This tool supports both a zenity and tty interface. TTY will be presented if available while Zenity will be used otherwise. This tool pulls a rootfs list from https://rootfs.fex-emu.org/ It then allows you to select a rootfs from the list, download it, place it in to the correct working folder, extract it if desired, and set it as the current default RootFS. This requires curl and potentially zenity installed to use. Maybe also unsquashfs if the user chooses to extract the image. This is an all in one tool to quickly get a new user up and running. Additionally if you pass in a file path in to the tool, it will generate an xxhash of the file and exit out. This is the hash used to ensure the files are valid.
85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
#include "XXFileHash.h"
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#include <chrono>
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#include <fcntl.h>
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#include <fmt/format.h>
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#include <unistd.h>
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#include <vector>
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#include <xxhash.h>
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namespace XXFileHash {
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// 32MB blocks
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constexpr static size_t BLOCK_SIZE = 32 * 1024 * 1024;
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std::pair<bool, uint64_t> HashFile(const std::string &Filepath) {
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int fd = open(Filepath.c_str(), O_RDONLY);
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if (fd == -1) {
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return {false, 0};
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}
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auto HadError = [fd]() -> std::pair<bool, uint64_t> {
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close(fd);
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return {false, 0};
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};
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// Get file size
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off_t Size = lseek(fd, 0, SEEK_END);
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double SizeD = Size;
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// Reset to beginning
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lseek(fd, 0, SEEK_SET);
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// Set up XXHash state
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XXH64_state_t* const State = XXH64_createState();
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XXH64_hash_t const Seed = 0;
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if (!State) {
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return HadError();
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}
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if (XXH64_reset(State, Seed) == XXH_ERROR) {
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return HadError();
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}
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std::vector<char> Data(BLOCK_SIZE);
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off_t DataRemaining = Size - BLOCK_SIZE;
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off_t DataTail = Size - DataRemaining;
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off_t CurrentOffset = 0;
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auto Now = std::chrono::high_resolution_clock::now();
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// Let the kernel know that we will be reading linearly
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posix_fadvise(fd, 0, Size, POSIX_FADV_SEQUENTIAL);
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while (CurrentOffset < DataRemaining) {
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ssize_t Result = pread(fd, Data.data(), BLOCK_SIZE, CurrentOffset);
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if (Result == -1) {
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return HadError();
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}
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if (XXH64_update(State, Data.data(), BLOCK_SIZE) == XXH_ERROR) {
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return HadError();
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}
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auto Cur = std::chrono::high_resolution_clock::now();
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auto Dur = Cur - Now;
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if (Dur >= std::chrono::seconds(5)) {
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fmt::print("{}% hashed\n", (double)CurrentOffset / SizeD);
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Now = Cur;
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}
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CurrentOffset += BLOCK_SIZE;
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}
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// Finish the tail
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ssize_t Result = pread(fd, Data.data(), DataTail, CurrentOffset);
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if (Result == -1) {
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return HadError();
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}
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if (XXH64_update(State, Data.data(), DataTail) == XXH_ERROR) {
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return HadError();
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}
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XXH64_hash_t const Hash = XXH64_digest(State);
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XXH64_freeState(State);
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close(fd);
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return {true, Hash};
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}
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}
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