78 lines
2.3 KiB
C#
78 lines
2.3 KiB
C#
using System.Globalization;
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using System.Text.RegularExpressions;
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namespace TinfoilVibeServer.Models;
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public static class IdHelper
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{
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public static string ToStrId(this int num)
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{
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return ToIdFromConvertedNumBytes(BitConverter.GetBytes(num));
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}
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public static string ToStrId(this uint num)
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{
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return ToIdFromConvertedNumBytes(BitConverter.GetBytes(num));
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}
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public static string ToStrId(this long num)
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{
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return ToIdFromConvertedNumBytes(BitConverter.GetBytes(num));
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}
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public static string ToStrId(this ulong num)
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{
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return ToIdFromConvertedNumBytes(BitConverter.GetBytes(num));
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}
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public static string ToStrId(this IEnumerable<byte> bytes)
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{
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return bytes.Aggregate("", (current, b) => current + b.ToString("X2"));
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}
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public static string ToStrId(this Span<byte> bytes)
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{
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return bytes.ToArray().ToStrId();
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}
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private static string ToIdFromConvertedNumBytes(IEnumerable<byte> getBytes)
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{
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return ToStrId(getBytes.Reverse());
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}
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public static string GetTitleId(this FileInfo fileInfo)
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{
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var match = Regex.Match(fileInfo.Name, "^.*\\[(\\w{16})\\].*\\.nsp$");
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return match is { Length: > 0, Groups.Count: > 1 }?match.Groups[1].Value:string.Empty;
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}
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#region 1️⃣ From hex string → byte[] (big‑endian)
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/// <summary>
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/// Turns an even‑length hex string into a byte array in **big‑endian** order
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/// (the same order that the original <c>ToStrId</c> creates).
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/// </summary>
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private static byte[] HexStringToBytes(string hex)
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{
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if (string.IsNullOrWhiteSpace(hex))
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throw new ArgumentException("ID string cannot be empty", nameof(hex));
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if (hex.Length % 2 != 0)
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throw new ArgumentException("ID string must contain an even number of hex digits", nameof(hex));
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var bytes = new byte[hex.Length / 2];
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for (var i = 0; i < bytes.Length; i++)
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{
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var chunk = hex.Substring(i * 2, 2);
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bytes[i] = byte.Parse(chunk, NumberStyles.HexNumber, CultureInfo.InvariantCulture);
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}
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return bytes;
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}
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#endregion
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public static long ToLongFromStrId(this string hex) =>
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BitConverter.ToInt64(HexStringToBytes(hex).Reverse().ToArray(), 0);
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} |