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share/include/XSParseSublike.h  view on Meta::CPAN

   * params whose pad variable has already been declared, and that have no
   * attributes attached.
   */
  char sigil;
  PADOFFSET padix;
};

static void (*signature_add_param_func)(pTHX_ struct XSParseSublikeContext *ctx, struct XPSSignatureParamDetails *details);
#define xps_signature_add_param(ctx, details)  S_xps_signature_add_param(aTHX_ ctx, details)
static void S_xps_signature_add_param(pTHX_ struct XSParseSublikeContext *ctx, struct XPSSignatureParamDetails *details)
{
  if(!signature_add_param_func)
    croak("Must call boot_xs_parse_sublike() first");

  (*signature_add_param_func)(aTHX_ ctx, details);
}

/* Easier to define one query function that takes a `q` parameter, that
 * indicates which question we are asking. This saves us having to export
 * lots of functions. This is internal implementation detail, not exposed
 * API.
 */
static IV (*signature_query_func)(pTHX_ struct XSParseSublikeContext *ctx, int q);
#define xps_signature_query_params(ctx)     S_xps_signature_query(aTHX_ ctx, 0)
#define xps_signature_query_optparams(ctx)  S_xps_signature_query(aTHX_ ctx, 1)
#define xps_signature_query_slurpy(ctx)     ((char)S_xps_signature_query(aTHX_ ctx, 2))
static IV S_xps_signature_query(pTHX_ struct XSParseSublikeContext *ctx, int q)
{
  if(!signature_query_func)
    croak("Must call boot_xs_parse_sublike() first");

  return (*signature_query_func)(aTHX_ ctx, q);
}

/* Experimental support for subroutine parameter attributes.
 * Only supported on Perl v5.26 or later
 */

struct XPSSignatureParamContext {
  bool is_named;
  PADOFFSET padix;
  OP *varop;
  /* apply phase runs here */
  OP *defop;
  OP *op;
  /* post_defop phase runs here */

  /* TODO: in next ABI-breaking change, move this to the top */
  char sigil;
  const char *namepv;
  STRLEN namelen;

  bool is_refalias;
};

struct XPSSignatureAttributeFuncs {
  U32 ver;  /* caller must initialise to XSPARSESUBLIKE_ABI_VERSION */
  U32 flags;
  const char *permit_hintkey;

  void (*apply)(pTHX_ struct XPSSignatureParamContext *ctx, SV *attrvalue, void **attrdata_ptr, void *funcdata);
  void (*post_defop)(pTHX_ struct XPSSignatureParamContext *ctx, void *attrdata, void *funcdata);

  void (*free)(pTHX_ void *attrdata, void *funcdata);
};

static void (*register_xps_signature_attribute_func)(pTHX_ const char *name, const struct XPSSignatureAttributeFuncs *funcs, void *funcdata);
#define register_xps_signature_attribute(name, funcs, funcdata) S_register_xps_signature_attribute(aTHX_ name, funcs, funcdata)
static void S_register_xps_signature_attribute(pTHX_ const char *name, const struct XPSSignatureAttributeFuncs *funcs, void *funcdata)
{
  if(!register_xps_signature_attribute_func)
    croak("Must call boot_xs_parse_sublike() first");

  (*register_xps_signature_attribute_func)(aTHX_ name, funcs, funcdata);
}


#define boot_xs_parse_sublike(ver) S_boot_xs_parse_sublike(aTHX_ ver)
static void S_boot_xs_parse_sublike(pTHX_ double ver) {
  SV **svp;
  SV *versv = ver ? newSVnv(ver) : NULL;

  load_module(PERL_LOADMOD_NOIMPORT, newSVpvs("XS::Parse::Sublike"), versv, NULL);

  svp = hv_fetchs(PL_modglobal, "XS::Parse::Sublike/ABIVERSION_MIN", 0);
  if(!svp)
    croak("XS::Parse::Sublike ABI minimum version missing");
  int abi_ver = SvIV(*svp);
  if(abi_ver > XSPARSESUBLIKE_ABI_VERSION)
    croak("XS::Parse::Sublike ABI version mismatch - library supports >= %d, compiled for %d",
        abi_ver, XSPARSESUBLIKE_ABI_VERSION);

  svp = hv_fetchs(PL_modglobal, "XS::Parse::Sublike/ABIVERSION_MAX", 0);
  abi_ver = SvIV(*svp);
  if(abi_ver < XSPARSESUBLIKE_ABI_VERSION)
    croak("XS::Parse::Sublike ABI version mismatch - library supports <= %d, compiled for %d",
        abi_ver, XSPARSESUBLIKE_ABI_VERSION);

  parse_xs_parse_sublike_func = INT2PTR(int (*)(pTHX_ const struct XSParseSublikeHooks *, void *, OP**),
      SvUV(*hv_fetchs(PL_modglobal, "XS::Parse::Sublike/parse()@6", 0)));

  register_xs_parse_sublike_func = INT2PTR(void (*)(pTHX_ const char *, const struct XSParseSublikeHooks *, void *),
      SvUV(*hv_fetchs(PL_modglobal, "XS::Parse::Sublike/register()@6", 0)));

  parseany_xs_parse_sublike_func = INT2PTR(int (*)(pTHX_ const struct XSParseSublikeHooks *, void *, OP**),
      SvUV(*hv_fetchs(PL_modglobal, "XS::Parse::Sublike/parseany()@6", 0)));

  register_xps_signature_attribute_func = INT2PTR(void (*)(pTHX_ const char *, const struct XPSSignatureAttributeFuncs *, void *),
      SvUV(*hv_fetchs(PL_modglobal, "XS::Parse::Sublike/register_sigattr()@5", 0)));

  signature_add_param_func = INT2PTR(void (*)(pTHX_ struct XSParseSublikeContext *ctx, struct XPSSignatureParamDetails *details),
      SvUV(*hv_fetchs(PL_modglobal, "XS::Parse::Sublike/signature_add_param()@7", 0)));

  signature_query_func = INT2PTR(IV (*)(pTHX_ struct XSParseSublikeContext *ctx, int q),
      SvUV(*hv_fetchs(PL_modglobal, "XS::Parse::Sublike/signature_query()@8", 0)));
}

#endif