diff --git a/LibGit/Extensions/DictionaryExtensions.cs b/LibGit/Extensions/DictionaryExtensions.cs
new file mode 100644
index 0000000..0e6df06
--- /dev/null
+++ b/LibGit/Extensions/DictionaryExtensions.cs
@@ -0,0 +1,15 @@
+namespace LibGit.Extensions;
+
+public static class DictionaryExtensions
+{
+ public static bool ChangeKey<TKey, TValue>(this IDictionary<TKey, TValue> dict,
+ TKey oldKey, TKey newKey)
+ {
+ TValue value;
+ if (!dict.Remove(oldKey, out value))
+ return false;
+
+ dict[newKey] = value; // or dict.Add(newKey, value) depending on ur comfort
+ return true;
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/HttpClientExtensions.cs b/LibGit/Extensions/HttpClientExtensions.cs
new file mode 100644
index 0000000..79e3e5f
--- /dev/null
+++ b/LibGit/Extensions/HttpClientExtensions.cs
@@ -0,0 +1,19 @@
+namespace LibGit.Extensions;
+
+public static class HttpClientExtensions
+{
+ public static async Task<bool> CheckSuccessStatus(this HttpClient hc, string url)
+ {
+ //cors causes failure, try to catch
+ try
+ {
+ var resp = await hc.GetAsync(url);
+ return resp.IsSuccessStatusCode;
+ }
+ catch (Exception e)
+ {
+ Console.WriteLine($"Failed to check success status: {e.Message}");
+ return false;
+ }
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/IEnumerableExtensions.cs b/LibGit/Extensions/IEnumerableExtensions.cs
new file mode 100644
index 0000000..d8fc54d
--- /dev/null
+++ b/LibGit/Extensions/IEnumerableExtensions.cs
@@ -0,0 +1,45 @@
+using System.IO.Compression;
+using System.Text;
+
+namespace LibGit.Extensions;
+
+public static class IEnumerableExtensions
+{
+ public static bool StartsWith<T>(this IEnumerable<T> list, IEnumerable<T> prefix)
+ {
+ return prefix.SequenceEqual(list.Take(prefix.Count()));
+ }
+
+ public static void HexDump(this IEnumerable<byte> bytes, int width = 32)
+ {
+ var data = new Queue<(string hex, char utf8)>(bytes.ToArray().Select(x => ($"{x:X2}", (char)x)).ToArray());
+ while (data.Count > 0)
+ {
+ var line = data.Dequeue(Math.Min(width, data.Count)).ToArray();
+ Console.WriteLine(
+ string.Join(" ", line.Select(x => x.hex)).PadRight(width * 3)
+ + " | "
+ + string.Join("", line.Select(x => x.utf8))
+ .Replace('\n', '.')
+ .Replace('\r', '.')
+ .Replace('\0', '.')
+ );
+ }
+ }
+
+ public static string AsHexString(this IEnumerable<byte> bytes) => string.Join(' ', bytes.Select(x => $"{x:X2}"));
+ public static string AsString(this IEnumerable<byte> bytes) => Encoding.UTF8.GetString(bytes.ToArray());
+
+
+ //zlib decompress
+ public static byte[] ZlibDecompress(this IEnumerable<byte> bytes)
+ {
+ var inStream = new MemoryStream(bytes.ToArray());
+ using ZLibStream stream = new ZLibStream(inStream, CompressionMode.Decompress);
+ using var result = new MemoryStream();
+ stream.CopyTo(result);
+ stream.Flush();
+ stream.Close();
+ return result.ToArray();
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/JsonElementExtensions.cs b/LibGit/Extensions/JsonElementExtensions.cs
new file mode 100644
index 0000000..dd97013
--- /dev/null
+++ b/LibGit/Extensions/JsonElementExtensions.cs
@@ -0,0 +1,22 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace LibGit.Extensions;
+
+public static class JsonElementExtensions
+{
+ public static void FindExtraJsonFields([DisallowNull] this JsonElement? res, Type t)
+ {
+ var props = t.GetProperties();
+ var unknownPropertyFound = false;
+ foreach (var field in res.Value.EnumerateObject())
+ {
+ if (props.Any(x => x.GetCustomAttribute<JsonPropertyNameAttribute>()?.Name == field.Name)) continue;
+ Console.WriteLine($"[!!] Unknown property {field.Name} in {t.Name}!");
+ unknownPropertyFound = true;
+ }
+ if(unknownPropertyFound) Console.WriteLine(res.Value.ToJson());
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/ObjectExtensions.cs b/LibGit/Extensions/ObjectExtensions.cs
new file mode 100644
index 0000000..2cdeccd
--- /dev/null
+++ b/LibGit/Extensions/ObjectExtensions.cs
@@ -0,0 +1,15 @@
+using System.Text.Json;
+
+namespace LibGit.Extensions;
+
+public static class ObjectExtensions
+{
+ public static string ToJson(this object obj, bool indent = true, bool ignoreNull = false, bool unsafeContent = false)
+ {
+ var jso = new JsonSerializerOptions();
+ if(indent) jso.WriteIndented = true;
+ if(ignoreNull) jso.IgnoreNullValues = true;
+ if(unsafeContent) jso.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping;
+ return JsonSerializer.Serialize(obj, jso);
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/QueueExtensions.cs b/LibGit/Extensions/QueueExtensions.cs
new file mode 100644
index 0000000..45b8093
--- /dev/null
+++ b/LibGit/Extensions/QueueExtensions.cs
@@ -0,0 +1,26 @@
+namespace LibGit.Extensions;
+
+public static class QueueExtensions
+{
+public static IEnumerable<T> Dequeue<T>(this Queue<T> queue, int count)
+{
+ for (int i = 0; i < count; i++)
+ {
+ yield return queue.Dequeue();
+ }
+}
+ public static IEnumerable<T> Peek<T>(this Queue<T> queue, int count)
+ {
+ for (int i = 0; i < count; i++)
+ {
+ yield return queue.ElementAt(i);
+ }
+ }
+ public static void Drop<T>(this Queue<T> queue, int count)
+ {
+ for (int i = 0; i < count; i++)
+ {
+ queue.Dequeue();
+ }
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/StreamExtensions.cs b/LibGit/Extensions/StreamExtensions.cs
new file mode 100644
index 0000000..6555783
--- /dev/null
+++ b/LibGit/Extensions/StreamExtensions.cs
@@ -0,0 +1,211 @@
+using System.IO.Compression;
+
+namespace LibGit.Extensions;
+
+public static class StreamExtensions
+{
+ private const bool _debug = false;
+
+ public static long Remaining(this Stream stream)
+ {
+ //if (_debug) Console.WriteLine($"stream pos: {stream.Position}, stream len: {stream.Length}, stream rem: {stream.Length - stream.Position}");
+ return stream.Length - stream.Position;
+ }
+
+ public static int Peek(this Stream stream)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't peek a non-readable stream");
+ if (!stream.CanSeek)
+ throw new InvalidOperationException("Can't peek a non-seekable stream");
+
+ int peek = stream.ReadByte();
+ if (peek != -1)
+ stream.Seek(-1, SeekOrigin.Current);
+
+ return peek;
+ }
+
+ public static IEnumerable<byte> Peek(this Stream stream, long count)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't peek a non-readable stream");
+ if (!stream.CanSeek)
+ throw new InvalidOperationException("Can't peek a non-seekable stream");
+ long i;
+ for (i = 0; i < count; i++)
+ {
+ int peek = stream.ReadByte();
+ if (peek == -1)
+ {
+ if(_debug) Console.WriteLine($"Can't peek {count} bytes, only {i} bytes remaining");
+ stream.Seek(-i, SeekOrigin.Current);
+ yield break;
+ }
+
+ yield return (byte)peek;
+ }
+ stream.Seek(-i, SeekOrigin.Current);
+ }
+
+ public static IEnumerable<byte> ReadBytes(this Stream stream, long count)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+ if (!stream.CanSeek)
+ throw new InvalidOperationException("Can't read a non-seekable stream");
+
+ for (long i = 0; i < count; i++)
+ {
+ int read = stream.ReadByte();
+ if (read == -1)
+ yield break;
+ yield return (byte)read;
+ }
+ }
+
+ public static bool StartsWith(this Stream stream, IEnumerable<byte> sequence)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+ if (!stream.CanSeek)
+ throw new InvalidOperationException("Can't read a non-seekable stream");
+
+ if (_debug)
+ {
+ Console.WriteLine($"Expected: {sequence.AsHexString()} ({sequence.AsString()})");
+ Console.WriteLine($"Actual: {stream.Peek(sequence.Count()).AsHexString()} ({stream.Peek(sequence.Count()).AsString()})");
+ }
+
+ int readCount = 0;
+ foreach (int b in sequence)
+ {
+ int read = stream.ReadByte();
+ readCount++;
+ if (read == -1)
+ {
+ stream.Seek(-readCount, SeekOrigin.Current);
+ return false;
+ }
+
+ if (read != b)
+ {
+ if (_debug)
+ {
+ Console.ForegroundColor = ConsoleColor.Red;
+ Console.WriteLine("^^".PadLeft(readCount * 3 + 9));
+ Console.ResetColor();
+ }
+
+ stream.Seek(-readCount, SeekOrigin.Current);
+ return false;
+ }
+ }
+ stream.Seek(-readCount, SeekOrigin.Current);
+
+ return true;
+ }
+
+ public static bool StartsWith(this Stream stream, string ascii_seq)
+ {
+ return stream.StartsWith(ascii_seq.Select(x => (byte)x));
+ }
+
+ public static Stream Skip(this Stream stream, long count = 1)
+ {
+ if (!stream.CanSeek)
+ throw new InvalidOperationException("Can't skip a non-seekable stream");
+ stream.Seek(count, SeekOrigin.Current);
+ return stream;
+ }
+
+ public static IEnumerable<byte> ReadNullTerminatedField(this Stream stream, IEnumerable<byte>? binaryPrefix = null, string? asciiPrefix = null) => ReadTerminatedField(stream: stream, terminator: 0x00, binaryPrefix: binaryPrefix, asciiPrefix: asciiPrefix);
+ public static IEnumerable<byte> ReadSpaceTerminatedField(this Stream stream, IEnumerable<byte>? binaryPrefix = null, string? asciiPrefix = null) => ReadTerminatedField(stream: stream, terminator: 0x20, binaryPrefix: binaryPrefix, asciiPrefix: asciiPrefix);
+ public static IEnumerable<byte> ReadTerminatedField(this Stream stream, byte terminator, IEnumerable<byte>? binaryPrefix = null, string? asciiPrefix = null)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+ if (binaryPrefix != null)
+ if (!stream.StartsWith(binaryPrefix))
+ throw new InvalidDataException($"Binary prefix {stream.Peek(binaryPrefix.Count()).AsHexString()} does not match expected value of {binaryPrefix.AsHexString()}!");
+ else stream.Skip(binaryPrefix.Count());
+ else if (asciiPrefix != null)
+ if (!stream.StartsWith(asciiPrefix))
+ throw new InvalidDataException($"Text prefix {stream.Peek(asciiPrefix.Length).AsHexString()} ({stream.Peek(asciiPrefix.Length).AsString()}) does not match expected value of {asciiPrefix.AsBytes().AsHexString()} ({asciiPrefix})!");
+ else stream.Skip(asciiPrefix.Length);
+
+ var read = 0;
+ while (stream.Peek() != terminator)
+ {
+ if (_debug) Console.WriteLine($"ReadTerminatedField -- pos: {stream.Position}/+{stream.Remaining()}/{stream.Length} | next: {(char)stream.Peek()} | Length: {read}");
+ if (stream.Peek() == -1)
+ {
+ Console.WriteLine($"Warning: Reached end of stream while reading null-terminated field");
+ yield break;
+ }
+
+ read++;
+ yield return (byte)stream.ReadByte();
+ }
+
+ if (stream.Peek() == terminator) stream.Skip();
+ }
+
+ public static IEnumerable<byte> ReadToEnd(this Stream stream)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+
+ while (stream.Peek() != -1)
+ yield return (byte)stream.ReadByte();
+ }
+
+ public static int ReadInt32BE(this Stream stream)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+
+ var bytes = stream.ReadBytes(4).ToArray();
+
+ if (BitConverter.IsLittleEndian)
+ Array.Reverse(bytes);
+
+ Console.WriteLine("ReadInt32BE: " + bytes.AsHexString() + " => " + BitConverter.ToInt32(bytes));
+ return BitConverter.ToInt32(bytes);
+ }
+
+ //read variable length number
+ public static int ReadVLQ(this Stream stream)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+
+ int result = 0;
+ int shift = 0;
+ byte b;
+ do
+ {
+ b = (byte)stream.ReadByte();
+ result |= (b & 0b0111_1111) << shift;
+ shift += 7;
+ } while ((b & 0b1000_0000) != 0);
+
+ return result;
+ }
+ public static int ReadVLQBigEndian(this Stream stream)
+ {
+ if (!stream.CanRead)
+ throw new InvalidOperationException("Can't read a non-readable stream");
+
+ int result = 0;
+ int shift = 0;
+ byte b;
+ do
+ {
+ b = (byte)stream.ReadByte();
+ result = (result << 7) | (b & 0b0111_1111);
+ } while ((b & 0b1000_0000) != 0);
+
+ return result;
+ }
+}
\ No newline at end of file
diff --git a/LibGit/Extensions/StringExtensions.cs b/LibGit/Extensions/StringExtensions.cs
new file mode 100644
index 0000000..f33bd4e
--- /dev/null
+++ b/LibGit/Extensions/StringExtensions.cs
@@ -0,0 +1,8 @@
+using System.Text;
+
+namespace LibGit.Extensions;
+
+public static class StringExtensions
+{
+ public static IEnumerable<byte> AsBytes(this string str) => Encoding.UTF8.GetBytes(str);
+}
\ No newline at end of file
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