kingchenc
12681e4b1b
Stacked on #222 (base `feat/c-abi-hub`), so the diff is just the additions on top of the hub foundation — no merge of #222 required. ## What this adds **Examples — full parity with rust/python/node (`examples/c/`)** - `streaming.c` upgraded to the multi-indicator (SMA/EMA/RSI/MACD + signals) demo - `backtest.c`, `multi_timeframe.c` (manual time-bucket resampling), `parallel_assets.c` (serial vs OpenMP fan-out, one handle per asset) - three educational strategies: `strategy_rsi_mean_reversion.c`, `strategy_macd_adx.c`, `strategy_bollinger_squeeze.c` - two network examples shelling out to `curl`: `fetch_btcusdt.c`, `live_binance.c` (REST poll) - two header-only helpers (`wickra_csv.h`, `wickra_strategy.h`) since the C ABI ships no IO layer - CMake builds all 11; the 9 offline ones run under `ctest` on 3 OS; the network two are built-only **Docs & metadata — surface the C ABI everywhere it was missing** - ARCHITECTURE diagram + crate table, SECURITY + THREAT_MODEL (the C ABI as the sole `unsafe` FFI surface), the three binding package READMEs, issue/PR templates, CHANGELOG, and the GitHub About template (live About + org description updated too) **Cleanup** - removed all references to the private generator tooling from public files (`bindings/c/src/lib.rs` header, `CONTRIBUTING.md`, `sync-about.yml`) Verified locally: `cargo build -p wickra-c --release`, `cmake + ctest` (9/9 pass), and `-Wall -Wextra -Wpedantic` clean on gcc 13.
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* Shared OHLCV CSV loader for the Wickra C examples.
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*
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* The C ABI exposes only the indicators, not the wickra-data IO layer, so the
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* examples read CSV themselves. This header-only helper is the C counterpart of
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* `wickra_data::csv::CandleReader` used by the Rust examples: it parses the
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* standard `timestamp,open,high,low,close,volume` files shipped under
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* `examples/data/`.
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*
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* Header-only: define WICKRA_CSV_IMPL in exactly one translation unit (each
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* example is a single .c file, so it just defines it before including this).
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*/
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#ifndef WICKRA_CSV_H
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#define WICKRA_CSV_H
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#include <stddef.h>
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#include <stdint.h>
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typedef struct WickraCandle {
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int64_t timestamp;
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double open;
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double high;
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double low;
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double close;
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double volume;
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} WickraCandle;
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/* Load an OHLCV CSV into a malloc'd array. Returns the candle count and stores
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* the array in *out (caller frees with free()). Returns 0 and leaves *out NULL
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* on any error (missing file, no parseable rows). A leading header line whose
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* first field is non-numeric is skipped. */
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size_t wickra_load_csv(const char *path, WickraCandle **out);
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#ifdef WICKRA_CSV_IMPL
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#include <stdio.h>
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#include <stdlib.h>
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size_t wickra_load_csv(const char *path, WickraCandle **out) {
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*out = NULL;
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FILE *f = fopen(path, "r");
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if (f == NULL) {
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fprintf(stderr, "wickra_load_csv: cannot open %s\n", path);
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return 0;
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}
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size_t cap = 1024;
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size_t n = 0;
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WickraCandle *rows = (WickraCandle *)malloc(cap * sizeof(*rows));
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if (rows == NULL) {
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fclose(f);
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return 0;
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}
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char line[512];
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while (fgets(line, (int)sizeof(line), f) != NULL) {
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WickraCandle c;
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long long ts = 0;
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/* sscanf returns the number of fields successfully matched. A header
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* row ("timestamp,...") matches 0 and is skipped. */
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int matched = sscanf(line, "%lld,%lf,%lf,%lf,%lf,%lf", &ts, &c.open,
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&c.high, &c.low, &c.close, &c.volume);
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if (matched != 6) {
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continue;
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}
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c.timestamp = (int64_t)ts;
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if (n == cap) {
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cap *= 2;
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WickraCandle *grown = (WickraCandle *)realloc(rows, cap * sizeof(*rows));
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if (grown == NULL) {
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free(rows);
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fclose(f);
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return 0;
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}
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rows = grown;
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}
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rows[n++] = c;
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}
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fclose(f);
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if (n == 0) {
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free(rows);
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return 0;
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}
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*out = rows;
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return n;
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}
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#endif /* WICKRA_CSV_IMPL */
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#endif /* WICKRA_CSV_H */
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