wrapper.h

#include <stddef.h> // for ptrdiff_t

// R_xlen_t is defined as int on 32-bit platforms, and
// that confuses Rust. Keeping it always as ptrdiff_t works
// fine even on 32-bit.
/// <div rustbindgen replaces="R_xlen_t"></div>
typedef ptrdiff_t R_xlen_t_rust;

// Define this for R_CStackLimit
// #define HAVE_UINTPTR_T
#define CSTACK_DEFNS

// From r83513 (R 4.3), R defines the `NORET` macro differently depending on the
// C/C++ standard the compiler uses. It matters when the header is used in C/C++
// libraries, but all we want to do here is to make bindgen interpret `NOREP` to
// `!`. However, for some reason, bindgen doesn't handle other no-return
// attributes like `_Noreturn` (for C11) and `[[noreturn]]` (for C++ and C23),
// so we define it here.
#define NORET __attribute__((__noreturn__))

// Currently, I'm adding these on as-needed basis
// but we may simply throw the whole lot in in the future.
#include <Rinternals.h>

#ifndef _WIN32
  #define R_INTERFACE_PTRS
  #include <Rinterface.h>
#else
    extern uintptr_t R_CStackLimit; /* C stack limit */
#endif
#include <Rembedded.h>

#include <Rmath.h>
#include <Rversion.h>
#include <R_ext/Parse.h>
#include <R_ext/Error.h>

#include <R_ext/Rdynload.h>
#include <R_ext/Altrep.h>
#include <R_ext/GraphicsEngine.h>
#include <R_ext/Applic.h>
#include <R_ext/Random.h>

// R 4.3 redefined `Rcomplex` to a union for compatibility with Fortran.
// But the old definition is compatible both the union version
// and the struct version.
// See: <https://github.com/extendr/extendr/issues/524>
/// <div rustbindgen replaces="Rcomplex"></div>
typedef struct
{
    double r;
    double i;
} R_complex_impl;