pineforge.h

Go to the documentation of this file.

/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * pineforge.h — public C ABI for the PineForge runtime.
 *
 * This header is the single source of truth for the harness ↔ compiled-
 * strategy boundary. Every PineForge-generated .so exports a fixed set
 * of C symbols declared below; the Python harness (validate_detailed_
 * report.py) and any C/C++/FFI consumer of compiled strategies links
 * against this contract.
 *
 * STABILITY GUARANTEE
 * ───────────────────
 * Within the same PINEFORGE_VERSION_MAJOR, this header's POD struct
 * layouts and `extern "C"` symbol signatures are append-only. Fields
 * are never reordered, removed, or retyped; new fields may only be
 * appended at the end of structs. New functions may be added; existing
 * functions are not removed or signature-changed.
 *
 * Across major versions all bets are off. Bump
 * PINEFORGE_VERSION_MAJOR when breaking the ABI.
 *
 * SCOPE — WHAT THIS HEADER COVERS
 * ───────────────────────────────
 * ✓ Lifecycle of a compiled strategy (create / destroy)
 * ✓ Running a backtest (auto-detect or fully configured)
 * ✓ Per-strategy configuration (inputs, overrides, magnifier, trace)
 * ✓ The shape of the report returned to the harness
 *
 * SCOPE — WHAT THIS HEADER DOES NOT COVER (BY DESIGN)
 * ───────────────────────────────────────────────────
 * ✗ The contract between codegen-emitted strategy code and the runtime
 *   internals (TA classes, math, series, strategy commands). That
 *   contract stays C++ — codegen and runtime ship together and are
 *   versioned in lockstep within the closed transpiler.
 * ✗ Source-compiling strategies. Use the closed transpiler binary.
 *
 * The C++ headers under `<pineforge/engine.hpp>` etc. are *internal*
 * implementation surface — not part of this stability guarantee.
 */
 
#ifndef PINEFORGE_H
#define PINEFORGE_H
 
#include <stdint.h>
#include <stddef.h>
 
/* ── Version ─────────────────────────────────────────────────────── */
 
/* Macros (PINEFORGE_VERSION_MAJOR / _MINOR / _PATCH / _STRING / _FULL,
 * PINEFORGE_GIT_SHA) live in the generated <pineforge/version.h>. */
#include <pineforge/version.h>
 
/* ── Visibility ──────────────────────────────────────────────────── */
 
#if defined(_WIN32) || defined(__CYGWIN__)
  #if defined(PINEFORGE_BUILD_SHARED)
    #define PF_API __declspec(dllexport)
  #else
    #define PF_API __declspec(dllimport)
  #endif
#elif defined(__GNUC__) || defined(__clang__)
  #define PF_API __attribute__((visibility("default")))
#else
  #define PF_API
#endif
 
/** Monotonic ABI version of pf_report_t / pf_trade_t layout. Bumped
 *  whenever a caller-visible struct grows. Consumers MUST verify
 *  pf_abi_version() == PF_ABI_VERSION before calling run_backtest.
 *  pf_report_t is caller-allocated: growth causes silent stack corruption
 *  in old callers that under-size the struct. pf_trade_t is runtime-
 *  allocated: growth causes array-stride misindexing in old readers that
 *  iterate the trades array with the stale sizeof. Value 2 = first
 *  versioned layout (metrics + equity curve); .so files predating this
 *  macro have no pf_abi_version symbol — treat dlsym failure as
 *  version 1. */
#define PF_ABI_VERSION 2
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** @defgroup pf_types Types
 *  @brief POD types and enums passed across the C ABI.
 *  @{
 */
 
/** Bar-magnifier sub-bar sampling distribution.
 *
 *  Selects how intra-bar synthetic ticks are placed when the bar
 *  magnifier is enabled in #run_backtest_full. Layout-compatible with the
 *  internal C++ `pineforge::MagnifierDistribution` enum class — a
 *  `static_assert` in `c_abi.cpp` guarantees the integer values match. */
typedef enum pf_magnifier_distribution_e {
    PF_MAGNIFIER_UNIFORM       = 0, /**< Uniform spacing across the parent bar. */
    PF_MAGNIFIER_COSINE        = 1, /**< Cosine-tapered density. */
    PF_MAGNIFIER_TRIANGLE      = 2, /**< Triangle-tapered density. */
    PF_MAGNIFIER_ENDPOINTS     = 3, /**< Default — exact O,H,L,C points plus uniform fill between. */
    PF_MAGNIFIER_FRONT_LOADED  = 4, /**< Sample density biased toward bar open. */
    PF_MAGNIFIER_BACK_LOADED   = 5  /**< Sample density biased toward bar close. */
} pf_magnifier_distribution_t;
 
/** Single OHLCV bar pushed into the engine.
 *
 *  Layout-compatible with the internal C++ `pineforge::Bar` struct. */
typedef struct pf_bar_s {
    double  open;       /**< Open price.   */
    double  high;       /**< High price.   */
    double  low;        /**< Low price.    */
    double  close;      /**< Close price.  */
    double  volume;     /**< Bar volume.   */
    int64_t timestamp;  /**< Bar open time, Unix milliseconds. */
} pf_bar_t;
 
/** Closed-trade record returned in pf_report_t::trades.
 *
 *  Layout-compatible with internal `pineforge::TradeC`. */
typedef struct pf_trade_s {
    int64_t entry_time;     /**< Entry fill time (Unix ms). */
    int64_t exit_time;      /**< Exit  fill time (Unix ms). */
    double  entry_price;    /**< Entry fill price (incl. slippage). */
    double  exit_price;     /**< Exit  fill price (incl. slippage). */
    double  pnl;            /**< Net realized PnL in account currency (commission-inclusive). */
    double  pnl_pct;        /**< Net return-on-cost in percent: pnl (NET of commission) /
                             *   entry cost (entry_price * qty * pointvalue) * 100. This is
                             *   TradingView's "Net P&L %" convention, arbitrated 2026-06-12
                             *   against a real TV export (trade #258 short: 102.44 USD on a
                             *   2276.66 entry => 4.50%). Degenerates to the old gross
                             *   (exit/entry-1)*100 form for longs with zero commission;
                             *   the previous short form (entry/exit-1)*100 was wrong on
                             *   large moves. Sign always matches pnl. */
    int     is_long;        /**< 1 if long, 0 if short. */
    double  max_runup;      /**< Peak favorable price travel during the trade ($/unit qty). */
    double  max_drawdown;   /**< Peak adverse  price travel during the trade ($/unit qty). */
    double  qty;            /**< Filled quantity. */
    double  commission;     /**< Entry+exit commission actually deducted from pnl
                             *   (account currency). pnl is already net of this. */
    int32_t entry_bar_index;/**< Script-bar index of the entry fill (0-based). */
    int32_t exit_bar_index; /**< Script-bar index of the exit fill (0-based). */
} pf_trade_t;
 
/** Trade-level statistics block — computed once each for all / long / short.
 *
 *  Loss-side fields (`gross_loss`, `avg_loss`, `largest_loss`) are
 *  **positive magnitudes** (absolute values of the underlying negative PnL). */
typedef struct pf_trade_stats_s {
    int32_t num_trades;                /**< Closed trades in this block (all / long-only / short-only). */
    int32_t num_wins;                  /**< Trades with pnl > 0. */
    int32_t num_losses;                /**< Trades with pnl < 0. */
    int32_t num_even;                  /**< Trades with pnl == 0.0 exactly; breaks both win and loss
                                        *   streaks; excluded from win/loss averages.
                                        *   Invariant: num_trades == num_wins + num_losses + num_even. */
    double  percent_profitable;        /**< 100 * num_wins / num_trades, in PERCENT (0-100).
                                        *   NaN when num_trades == 0. */
    double  net_profit;                /**< Sum of pnl (account currency, net of commission). */
    double  net_profit_pct;            /**< net_profit as a percent of initial capital (0-100 scale).
                                        *   NaN when initial capital <= 0. */
    double  gross_profit;              /**< Sum of winning pnl. */
    double  gross_profit_pct;          /**< gross_profit as a percent of initial capital (0-100 scale).
                                        *   NaN when initial capital <= 0. */
    double  gross_loss;                /**< Sum of |losing pnl| — POSITIVE magnitude (TV display convention). */
    double  gross_loss_pct;            /**< gross_loss as a percent of initial capital (0-100 scale).
                                        *   NaN when initial capital <= 0. */
    double  profit_factor;             /**< gross_profit / gross_loss. NaN when gross_loss == 0. */
    double  avg_trade;                 /**< net_profit / num_trades. NaN when num_trades == 0. */
    double  avg_trade_pct;             /**< Mean of per-trade pnl_pct over all trades.
                                        *   NaN when num_trades == 0. */
    double  avg_win;                   /**< gross_profit / num_wins. NaN when num_wins == 0. */
    double  avg_win_pct;               /**< Mean of per-trade pnl_pct over winning trades.
                                        *   NaN when num_wins == 0. */
    double  avg_loss;                  /**< gross_loss / num_losses (positive magnitude).
                                        *   NaN when num_losses == 0. */
    double  avg_loss_pct;              /**< Mean of the NEGATED pnl_pct of the losing trades. Since
                                        *   pnl_pct is net return-on-cost (sign matches pnl), this is
                                        *   a genuinely POSITIVE magnitude. Basis = pf_trade_t::pnl_pct.
                                        *   NaN when num_losses == 0. */
    double  ratio_avg_win_avg_loss;    /**< avg_win / avg_loss. NaN unless both sides non-empty. */
    double  largest_win;               /**< Single largest pnl among winning trades.
                                        *   NaN when num_wins == 0. */
    double  largest_win_pct;           /**< Maximum pnl_pct over winning trades — an INDEPENDENT
                                        *   maximum, not the pct of the largest-USD win (TV convention,
                                        *   validated 2026-06-12 vs TV export).
                                        *   NaN when num_wins == 0. */
    double  largest_loss;              /**< Single largest |pnl| among losing trades (positive magnitude).
                                        *   NaN when num_losses == 0. */
    double  largest_loss_pct;          /**< Maximum of -pnl_pct over losing trades (positive magnitude) —
                                        *   an INDEPENDENT maximum, not the pct of the largest-USD loss
                                        *   (TV convention, validated 2026-06-12 vs TV export: All
                                        *   "Largest loss %" came from a different trade than the
                                        *   largest USD loss). NaN when num_losses == 0. */
    double  commission_paid;           /**< Sum of pf_trade_t::commission in the block. */
    double  expectancy;                /**< (num_wins/num_trades)*avg_win - (num_losses/num_trades)*avg_loss,
                                        *   account currency per trade. NaN when num_trades == 0. */
    int32_t max_consecutive_wins;      /**< Longest winning run; even trades reset both streaks. */
    int32_t max_consecutive_losses;    /**< Longest losing run; even trades reset both streaks. */
    double  avg_bars_in_trade;         /**< Mean of (exit_bar_index - entry_bar_index + 1) in SCRIPT
                                        *   bars, over all trades — inclusive of the entry bar (TV
                                        *   convention, validated 2026-06-12).
                                        *   NaN when num_trades == 0. */
    double  avg_bars_in_wins;          /**< Mean bar duration of winning trades, inclusive of the entry
                                        *   bar (TV convention, validated 2026-06-12).
                                        *   NaN when num_wins == 0. */
    double  avg_bars_in_losses;        /**< Mean bar duration of losing trades, inclusive of the entry
                                        *   bar (TV convention, validated 2026-06-12).
                                        *   NaN when num_losses == 0. */
} pf_trade_stats_t;
 
/** Equity-curve-derived statistics (all-trades only, like TV). */
typedef struct pf_equity_stats_s {
    double max_equity_drawdown;        /**< Peak-to-trough equity drop, positive currency magnitude. */
    double max_equity_drawdown_pct;    /**< max_equity_drawdown relative to the peak in effect
                                        *   (PERCENT 0-100). */
    double max_equity_runup;           /**< Trough-to-peak rise where the trough resets on each new
                                        *   equity peak (mirrors the engine's intra-run extremes). */
    double max_equity_runup_pct;       /**< max_equity_runup relative to that trough (PERCENT 0-100). */
    double buy_hold_return;            /**< initial_capital * (last_close/first_open - 1), currency.
                                        *   NaN when first chart open is non-finite or <= 0. */
    double buy_hold_return_pct;        /**< buy_hold_return as PERCENT.
                                        *   NaN when first chart open is non-finite or <= 0. */
    double sharpe_tv;                  /**< Month-end-resampled equity simple returns (chart timezone,
                                        *   open-time bucketing), risk-free 2%/yr (2/12 per month),
                                        *   annualized by sqrt(12). Uses sample (N-1) stddev.
                                        *   NaN with <2 monthly returns or zero deviation. */
    double sortino_tv;                 /**< Same resampling as sharpe_tv; uses population downside
                                        *   deviation vs the monthly risk-free.
                                        *   NaN with <2 monthly returns or zero deviation. */
    double sharpe_bar;                 /**< Per-script-bar returns, annualized by observed bar density
                                        *   (bars per year = (len-1)/calendar span), NOT a fixed
                                        *   calendar formula. Uses sample (N-1) stddev.
                                        *   NaN with <2 returns or zero deviation. */
    double sortino_bar;                /**< Same construction as sharpe_bar over per-bar returns;
                                        *   uses population downside deviation.
                                        *   NaN with <2 returns or zero deviation. */
    double cagr;                       /**< PERCENT per year: 100*((final_equity/initial_capital)^(1/years)-1).
                                        *   NaN when span <= 0 or either side <= 0. */
    double calmar;                     /**< cagr / max_equity_drawdown_pct — BOTH IN PERCENT, so the
                                        *   ratio is dimensionless. NaN when drawdown is 0. */
    double recovery_factor;            /**< net_profit / max_equity_drawdown (currency / currency).
                                        *   NaN when drawdown is 0. */
    double time_in_market_pct;         /**< PERCENT (0-100) of script bars with an open position
                                        *   at bar close. */
    double open_pl;                    /**< Mark-to-market open profit at the final bar. */
} pf_equity_stats_t;
 
/** Composite metrics container: trade stats (all / long / short) +
 *  equity-curve stats. */
typedef struct pf_metrics_s {
    pf_trade_stats_t  all, longs, shorts;
    pf_equity_stats_t equity;
} pf_metrics_t;
 
/** Single per-script-bar equity point.
 *
 *  `time_ms` is the script-bar **open** timestamp (Unix ms).
 *  `equity` = `initial_capital` + `net_profit` + `open_profit` at bar close. */
typedef struct pf_equity_point_s {
    int64_t time_ms;       /**< Script-bar OPEN timestamp (Unix ms). */
    double  equity;        /**< initial_capital + net_profit + open_profit. */
    double  open_profit;   /**< Mark-to-market open P&L at bar close. */
} pf_equity_point_t;
 
/** Per-`request.security()` site diagnostic counters.
 *
 *  Layout-compatible with internal `pineforge::SecurityDiagC`. */
typedef struct pf_security_diag_s {
    int     sec_id;          /**< Stable id for the request.security site. */
    int64_t feed_count;      /**< Higher-TF feed bars consumed. */
    int64_t complete_count;  /**< Evaluations on completed parent bars. */
    int64_t partial_count;   /**< Evaluations on still-forming parent bars. */
} pf_security_diag_t;
 
/** Single per-bar trace entry.
 *
 *  Emitted when the source script contains `// @pf-trace name=expr`
 *  pragmas and tracing is enabled via #strategy_set_trace_enabled.
 *  Layout-compatible with internal `pineforge::TraceEntryC`. */
typedef struct pf_trace_entry_s {
    int64_t timestamp;  /**< Bar timestamp (Unix ms). */
    int32_t bar_index;  /**< Zero-based bar index. */
    int32_t name_id;    /**< Index into pf_report_t::trace_names. */
    double  value;      /**< Traced expression value on this bar. */
} pf_trace_entry_t;
 
/** Backtest report filled by #run_backtest / #run_backtest_full.
 *
 *  Layout-compatible with internal `pineforge::ReportC`.
 *
 *  ### Ownership and lifetime
 *  The struct itself is caller-owned (typically stack). The embedded
 *  arrays (`trades`, `security_diag`, `trace`, `trace_names`,
 *  `equity_curve`) are heap-allocated by the runtime; the caller must
 *  invoke #report_free exactly once on each filled report.
 *  `trace_names` string pointers remain owned by the strategy handle
 *  until #strategy_free. */
 
typedef struct pf_report_s {
    /* Trades */
    int             total_trades;       /**< Closed-trade count (== trades_len). */
    pf_trade_t*     trades;             /**< Heap array of closed trades. */
    int             trades_len;         /**< Length of #trades. */
    double          net_profit;         /**< Sum of all closed-trade PnL. */
 
    /* Bar processing counts */
    int64_t         input_bars_processed;   /**< Source-feed bars consumed. */
    int64_t         script_bars_processed;  /**< Script-timeframe bars evaluated. */
 
    /* Security diagnostics */
    int64_t         security_feeds_total;     /**< Total higher-TF feed bars across all security sites. */
    int64_t         security_complete_total;  /**< Total complete-bar evals across all security sites. */
    int64_t         security_partial_total;   /**< Total partial-bar evals across all security sites. */
 
    /* Bar magnifier diagnostics */
    int64_t         magnifier_sub_bars_total;     /**< Sub-bars synthesized by the magnifier. */
    int64_t         magnifier_sample_ticks_total; /**< Sample ticks visited by the magnifier. */
 
    /* Timeframe metadata */
    int             input_tf_seconds;       /**< Detected/configured input timeframe (seconds). */
    int             script_tf_seconds;      /**< Script timeframe (seconds). */
    int             script_tf_ratio;        /**< script_tf_seconds / input_tf_seconds. */
    int             needs_aggregation;      /**< 1 if input → script TF aggregation was performed. */
    int             bar_magnifier_enabled;  /**< 1 if magnifier was active for this run. */
 
    /* Per-security feed/eval counters */
    pf_security_diag_t* security_diag;      /**< One entry per request.security site. */
    int                 security_diag_len;  /**< Length of #security_diag. */
 
    /* Per-bar trace records */
    pf_trace_entry_t*   trace;              /**< Per-bar trace records (empty unless tracing enabled). */
    int                 trace_len;          /**< Length of #trace. */
    const char**        trace_names;        /**< Names indexed by pf_trace_entry_t::name_id. */
    int                 trace_names_len;    /**< Length of #trace_names. */
 
    /* Computed trading metrics. Trade-based blocks reported for all /
     * long-only / short-only; equity-based stats are all-trades only.
     * Loss-side fields are positive magnitudes. Undefined values are NaN
     * (see per-field docs). */
    pf_metrics_t        metrics;
    /* Per-script-bar equity curve. time_ms is the script-bar OPEN
     * timestamp; equity = initial_capital + net_profit + open_profit at
     * bar close. Heap-allocated; freed by report_free. len ==
     * script_bars_processed, EXCEPT after a mid-run error (check
     * strategy_get_last_error): an exception can truncate the curve, and
     * metrics then describe the truncated prefix. NOTE int64_t length
     * (ctypes: c_int64). */
    pf_equity_point_t*  equity_curve;
    int64_t             equity_curve_len;
} pf_report_t;
 
/** @} */ /* end of pf_types */
 
/** Opaque handle to a compiled strategy instance. */
typedef void* pf_strategy_t;
 
/* ───────────────────────────────────────────────────────────────────
 * STRATEGY .SO EXPORTS — implemented per compiled strategy
 * ───────────────────────────────────────────────────────────────────
 *
 * Each .so emitted by the codegen exports the following symbols. The
 * runtime library itself does NOT define them — they are per-strategy
 * implementations generated by the transpiler.
 *
 * Note on naming: these are the legacy unprefixed names retained for
 * backward compatibility with the existing harness. Future major
 * versions may introduce `pf_`-prefixed equivalents and deprecate the
 * unprefixed forms.
 */
 
/** @defgroup pf_lifecycle Strategy lifecycle
 *  @brief Create, run, and destroy a compiled strategy instance.
 *  @{
 *
 *  NOTE: Per-strategy symbols (strategy_create, run_backtest, etc.) are
 *  emitted by the codegen with internal C++ types (ReportC, Bar) that are
 *  layout-compatible but type-distinct from the public C PODs below.
 *  Guard with PINEFORGE_NO_STRATEGY_DECLS so engine.hpp can include this
 *  header for its POD types without conflicting with per-strategy TU
 *  definitions.
 */
 
#ifndef PINEFORGE_NO_STRATEGY_DECLS
 
/** Allocate a new strategy instance.
 *
 *  @param params_json  Currently ignored; pass `NULL`.
 *  @return Strategy handle, or `NULL` on allocation failure.
 *
 *  Caller owns the returned handle and must release it via #strategy_free. */
PF_API pf_strategy_t strategy_create(const char* params_json);
 
/** Release a strategy handle previously returned by #strategy_create.
 *
 *  Safe to call with `NULL`. Invalidates any `pf_report_t::trace_names`
 *  pointers obtained from this strategy. */
PF_API void strategy_free(pf_strategy_t s);
 
/** Run a backtest with auto-detected timeframe and no bar magnifier.
 *
 *  @param s     Strategy handle from #strategy_create.
 *  @param bars  Non-NULL pointer to OHLCV bars (length @p n).
 *  @param n     Bar count (>= 0).
 *  @param out   Non-NULL output report. Fields are populated with heap
 *               allocations the caller must release via #report_free. */
PF_API void run_backtest(pf_strategy_t s,
                         pf_bar_t* bars,
                         int n,
                         pf_report_t* out);
 
/** Run a backtest with explicit timeframe and magnifier configuration.
 *
 *  @param s                  Strategy handle.
 *  @param bars               Bar feed.
 *  @param n                  Bar count.
 *  @param input_tf           Input timeframe ("1", "5", "15", "60", "1D", ...).
 *                            Empty string → auto-detect from bar timestamps.
 *  @param script_tf          Script timeframe. Empty string → defaults to @p input_tf.
 *  @param bar_magnifier      Boolean (0 / non-zero) — enable bar magnifier.
 *  @param magnifier_samples  Sub-bar samples per parent bar (typical: 4).
 *  @param magnifier_dist     Sampling distribution (see #pf_magnifier_distribution_t).
 *  @param out                Output report. Free with #report_free. */
PF_API void run_backtest_full(pf_strategy_t s,
                              pf_bar_t* bars,
                              int n,
                              const char* input_tf,
                              const char* script_tf,
                              int bar_magnifier,
                              int magnifier_samples,
                              pf_magnifier_distribution_t magnifier_dist,
                              pf_report_t* out);
 
/** Free heap arrays attached to a filled report.
 *
 *  Idempotent. Safe to call with `NULL` or an already-freed report.
 *  The `pf_report_t` struct itself is caller-owned. */
PF_API void report_free(pf_report_t* report);
 
/** @} */ /* end of pf_lifecycle */
 
/** @defgroup pf_config Per-strategy configuration
 *  @brief Override @c input.*() values, `strategy(...)` params, and runtime knobs.
 *  @{
 */
 
/** Override a Pine @c input.*() value before the next run.
 *
 *  @param s      Strategy handle.
 *  @param key    The input's title (or fallback identifier).
 *  @param value  Serialized value — numbers as decimal strings,
 *                booleans as `"true"` / `"false"`.
 *
 *  Calls after #run_backtest are accepted but only take effect on
 *  subsequent runs. */
PF_API void strategy_set_input(pf_strategy_t s,
                               const char* key,
                               const char* value);
 
/** Override a `strategy(...)` declaration parameter.
 *
 *  Recognised @p key values: `initial_capital`, `commission_value`,
 *  `default_qty_value`, `pyramiding`, `slippage`,
 *  `process_orders_on_close`, `close_entries_rule`, `default_qty_type`,
 *  `commission_type`. */
PF_API void strategy_set_override(pf_strategy_t s,
                                  const char* key,
                                  const char* value);
 
/** Toggle volume-weighted bar-magnifier sampling.
 *
 *  Has no effect unless the bar magnifier is enabled in
 *  #run_backtest_full. */
PF_API void strategy_set_magnifier_volume_weighted(pf_strategy_t s,
                                                   int on);
 
#endif /* PINEFORGE_NO_STRATEGY_DECLS */
 
/* ───────────────────────────────────────────────────────────────────
 * RUNTIME LIBRARY EXPORTS — implemented in libruntime
 * ─────────────────────────────────────────────────────────────────── */
 
/** Toggle per-bar trace recording. Default off (zero-cost when off).
 *
 *  Enables capture for `// @pf-trace name=expr` pragmas already compiled
 *  into the strategy `.so`. Trace records appear in pf_report_t::trace. */
PF_API void strategy_set_trace_enabled(pf_strategy_t s, int on);
 
/** Set the earliest Unix-ms timestamp at which strategy order commands
 *  may fire.
 *
 *  Earlier bars still execute user code and warm TA/series state, but
 *  `strategy.entry/order/exit/close` commands are ignored. */
PF_API void strategy_set_trade_start_time(pf_strategy_t s, int64_t timestamp_ms);
 
/** Set the strategy's chart timezone (IANA / POSIX TZ string).
 *
 *  Pine builtins ``hour``, ``minute``, ``second``, ``dayofmonth``,
 *  ``dayofweek``, ``month``, ``year`` and ``weekofyear`` return the
 *  wall-clock for the chart's timezone — TV exports trade rows in chart
 *  TZ too. Engine bars are stored as Unix-ms (UTC), so without this
 *  override these builtins return UTC and silently diverge from TV by N
 *  hours when the chart is on a non-UTC zone (Asia/Taipei = UTC+8 is the
 *  validator default).
 *
 *  Pass `NULL`, `""`, `"UTC"` or `"Etc/UTC"` for the legacy UTC
 *  behaviour (cheap, mutex-free). Any other value names a TZ resolved by
 *  the system tzdata; the per-bar decomposition then runs under a
 *  process-global mutex so multi-threaded harnesses don't corrupt each
 *  other's wall time.
 *
 *  Should be called before #run_backtest / #run_backtest_full. Persists
 *  across runs on the same strategy handle until overridden. */
PF_API void strategy_set_chart_timezone(pf_strategy_t s, const char* tz);
 
/** Plumb the symbol's exchange timezone (IANA string) into syminfo. Feeds
 *  ``session.ismarket`` / ``time(session)`` predicates. Defaults to "UTC"
 *  (crypto). Distinct from #strategy_set_chart_timezone — the chart TZ
 *  drives wall-clock builtins and intraday-cap day rollover; this drives
 *  session membership. `NULL` is ignored. Call before #run_backtest*. */
PF_API void strategy_set_syminfo_timezone(pf_strategy_t s, const char* tz);
 
/** Set the symbol's session string (e.g. "0930-1600:23456", default
 *  "24x7"). Feeds ``session.ismarket`` / ``time(session)``. `NULL`
 *  ignored. Call before #run_backtest*. */
PF_API void strategy_set_syminfo_session(pf_strategy_t s, const char* session);
 
/** Set the instrument tick size (``syminfo.mintick``, default 0.01). Drives the
 *  directional stop-entry snap and ``slippage = N*mintick`` economics. Set
 *  per-instrument (e.g. 0.25 for ES, 0.00001 for FX). Non-positive ignored.
 *  Call before #run_backtest*. */
PF_API void strategy_set_syminfo_mintick(pf_strategy_t s, double mintick);
 
/** Set the instrument point value (``syminfo.pointvalue``, default 1.0) — the
 *  $-per-point-per-contract multiplier applied to every money path: realized
 *  PnL and MFE/MAE, open profit / mark-to-market equity (and the drawdown /
 *  runup extremes), percent-of-equity and cash position sizing, percent
 *  commission notionals, and the margin admission check. Set per-instrument
 *  (e.g. 50 for ES). Non-positive ignored. Call before #run_backtest*. */
PF_API void strategy_set_syminfo_pointvalue(pf_strategy_t s, double pointvalue);
 
/** Inject a fundamental/exchange metadata value by Pine member name
 *  (e.g. "shares_outstanding_total", "target_price_average"). These have
 *  no OHLCV source; reads of un-injected members return na. Call before
 *  #run_backtest*. */
PF_API void strategy_set_syminfo_metadata(pf_strategy_t s, const char* key,
                                          double value);
 
/** Returns the error message captured by the most recent #run_backtest /
 *  #run_backtest_full call on this strategy.
 *
 *  Returns an empty string when the run completed normally, or `NULL`
 *  only when `s` itself is `NULL`. The pointer is owned by the engine
 *  and remains valid until the next #run_backtest* call (which clears
 *  the captured error before it begins).
 *
 *  The runtime catches every `std::exception` derivative inside the
 *  engine's run loop so the C ABI never unwinds a C++ exception across
 *  the `extern "C"` boundary. Consumers must check this after every
 *  run to surface engine-rejected configurations such as a script
 *  timeframe finer than the input timeframe, a `request.security`
 *  timeframe below the chart timeframe without a supported lower-TF
 *  emulation, or a missing input timeframe when securities are
 *  registered. */
PF_API const char* strategy_get_last_error(pf_strategy_t s);
 
/** @} */ /* end of pf_config */
 
/** @defgroup pf_version Version query
 *  @brief Runtime version metadata.
 *  @{
 */
 
/** Runtime version descriptor returned by #pf_version_get. */
typedef struct pf_version_s {
    int         major;       /**< Major version. */
    int         minor;       /**< Minor version. */
    int         patch;       /**< Patch version. */
    const char* commit_sha;  /**< Short git commit SHA, or `""` if unknown. */
} pf_version_t;
 
/** @return Linked runtime version. */
PF_API pf_version_t pf_version_get(void);
 
/** @return Monotonic ABI version (see #PF_ABI_VERSION). */
PF_API int pf_abi_version(void);
 
/** Full git-derived version descriptor.
 *
 *  Returns `"MAJOR.MINOR.PATCH[-N-gSHA[-dirty]]"` for git checkouts, or
 *  plain `"MAJOR.MINOR.PATCH"` for tarball builds. The pointer is to a
 *  static string with program lifetime; do not free. */
PF_API const char* pf_version_string(void);
 
/** @} */ /* end of pf_version */
 
#ifdef __cplusplus
} /* extern "C" */
#endif
 
#endif /* PINEFORGE_H */