kingchenc
91f6f67257
The first language stecker on the C ABI hub: a .NET binding exposing all 514 indicators as idiomatic `IDisposable` classes, generated from `wickra.h`. ## What's here - **`bindings/csharp/`** — the `Wickra` .NET 8 package. `[LibraryImport]` source-generated P/Invoke (`NativeMethods.g.cs`) plus idiomatic wrappers (`Indicators.g.cs`), both generated from the committed `bindings/c/include/wickra.h`. The binding owns no indicator maths — it only marshals types across the C ABI. - **Marshalling, verified end-to-end against the native library.** Opaque handles cross as `nint` kept alive per call via a `SafeHandle`; `bool` as `[MarshalAs(U1)]` (Rust `bool` is one byte); a self-correcting `DllImportResolver` validates the loaded library actually exports the Wickra ABI. Tests cover one representative per FFI archetype (scalar, candle, pairwise, multi-output, bars, profile, values-profile, order-book / array-input) plus exact Sma reference values. - **NuGet packaging** — `dotnet pack` produces `Wickra.<version>.nupkg`; the release pipeline stages prebuilt native libraries under `runtimes/<rid>/native/` for six target triples (win/linux/osx × x64/arm64). - **`examples/csharp/`** — nine examples mirroring `examples/c/`: streaming, backtest, multi_timeframe, parallel_assets, three strategies, and fetch_btcusdt + live_binance. - **CI** — a `csharp` job on the three OSes builds the C ABI, tests the binding, and runs the offline examples. **Release** — a gated `csharp-publish` job packs and pushes to NuGet (gated on `NUGET_API_KEY`, independent of the GitHub-release job so a C# hiccup never blocks the C/C++ asset release). - **Docs consistency wave** — README, CONTRIBUTING, CHANGELOG, examples/README, the issue / PR templates, `sync-about.yml`, and `.gitattributes`. The native Python / Node / WASM bindings and the C ABI are untouched; this is additive. Publishing to NuGet stays gated behind the release tag and the secret.
41 lines
1.3 KiB
C#
41 lines
1.3 KiB
C#
using System.Globalization;
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using System.Net.WebSockets;
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using System.Text;
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using System.Text.Json;
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using Wickra;
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// Stream live BTCUSDT 1-minute klines from Binance and feed each close through EMA(20).
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// Requires network access (build-only in CI). Runs for up to 60 seconds.
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var uri = new Uri("wss://stream.binance.com:9443/ws/btcusdt@kline_1m");
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Console.WriteLine($"Connecting to {uri} (up to 60s)...");
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using var ws = new ClientWebSocket();
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using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(60));
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using var ema = new Ema(20);
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var buffer = new byte[8192];
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try
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{
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await ws.ConnectAsync(uri, cts.Token);
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while (ws.State == WebSocketState.Open && !cts.IsCancellationRequested)
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{
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var result = await ws.ReceiveAsync(buffer, cts.Token);
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if (result.MessageType == WebSocketMessageType.Close)
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{
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break;
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}
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using var doc = JsonDocument.Parse(Encoding.UTF8.GetString(buffer, 0, result.Count));
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if (doc.RootElement.TryGetProperty("k", out var k))
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{
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var close = double.Parse(k.GetProperty("c").GetString()!, CultureInfo.InvariantCulture);
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var value = ema.Update(close);
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Console.WriteLine($"close={close:F2} EMA(20)={value:F2}");
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}
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}
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}
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catch (OperationCanceledException)
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{
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Console.WriteLine("Done (time limit reached).");
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}
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