kingchenc
b7ef63400d
Adds an R binding (`bindings/r`) over the C ABI hub — the third language stecker after C# and Go, reaching the hub through R's native `.Call` interface (not extendr). ## What's here - **`bindings/r`** — an R package exposing all 514 indicators as constructors that return a `wickra_indicator` object with generic `update`/`batch`/`reset` methods. The C glue (`src/wickra.c`) and R wrappers (`R/indicators.R`) are generated from `bindings/c/include/wickra.h` (same archetype taxonomy as the C#/Go generators: scalar/batch, multi-output, bars, profile, profile-values, array-input). The opaque handle is an R external pointer freed by a registered finalizer; multi-output returns a named vector (`NA` at warmup), bars a matrix, profiles a list. - **`examples/r`** — the full example suite mirroring C/C#/Go: streaming, backtest, multi_timeframe, parallel_assets (`mclapply`), three strategies, and `fetch_btcusdt`/`live_binance`. - **CI** — an `r` job builds the C ABI library, installs the package, runs the `testthat` suite and the offline examples on Linux, macOS and Windows (`R CMD check` is clean: 0 warnings, 0 notes). - **Docs** — R added to the README languages table, project layout, building/testing, CONTRIBUTING binding table + regenerate note, ARCHITECTURE, examples index, issue/PR templates, the About-description template, and the other binding READMEs. ## Linking / distribution The package compiles a thin `.Call` glue layer against the prebuilt C ABI library (header via `WICKRA_INCLUDE_DIR`, library via `WICKRA_LIB_DIR`). On Windows the package's own `wickra.dll` would collide with the C ABI's `wickra.dll`, so `configure.win` stages a renamed copy (`wickra_abi.dll`) and builds an import library referencing it; `install.libs.R` bundles the DLL and `.onLoad` puts it on the load path. On Linux/macOS the rpath locates the shared library. No `release.yml` change — R is distributed via r-universe / source install (gated). No Rust crate or `Cargo.toml` change — the R package is standalone and additive.
14 lines
757 B
R
14 lines
757 B
R
# Download real BTCUSDT hourly klines from the Binance REST API into a CSV that the
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# other examples can consume. Requires network access and the 'jsonlite' package.
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if (!requireNamespace("jsonlite", quietly = TRUE)) stop("install 'jsonlite' to run this example")
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url <- "https://api.binance.com/api/v3/klines?symbol=BTCUSDT&interval=1h&limit=500"
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cat("Fetching", url, "\n")
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klines <- jsonlite::fromJSON(url)
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dir.create("data", showWarnings = FALSE)
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df <- data.frame(
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timestamp = as.numeric(klines[, 1]), open = klines[, 2], high = klines[, 3],
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low = klines[, 4], close = klines[, 5], volume = klines[, 6]
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)
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utils::write.csv(df, "data/btcusdt_1h.csv", row.names = FALSE, quote = FALSE)
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cat(sprintf("Wrote %d klines to data/btcusdt_1h.csv\n", nrow(df)))
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