/*
 * This file was generated automatically by ExtUtils::ParseXS version 3.35 from the
 * contents of COW.xs. Do not edit this file, edit COW.xs instead.
 *
 *    ANY CHANGES MADE HERE WILL BE LOST!
 *
 */

#line 1 "COW.xs"
/*
*
* Copyright (c) 2018, Nicolas R.
*
* This is free software; you can redistribute it and/or modify it under the
* same terms as Perl itself.
*
*/

#include <EXTERN.h>
#include <perl.h>
#include <XSUB.h>
#include <embed.h>


#define MIN_PERL_VERSION_FOR_COW  20

#if defined(SV_COW_REFCNT_MAX)
#   define B_CAN_COW 1
#else
#   define B_CAN_COW 0
#endif

/* CowREFCNT is incorrect on Perl < 5.32 */
#define myCowREFCNT(sv)   ((SvLEN(sv)>0) ? CowREFCNT(sv) : 0)

#line 37 "COW.c"
#ifndef PERL_UNUSED_VAR
#  define PERL_UNUSED_VAR(var) if (0) var = var
#endif

#ifndef dVAR
#  define dVAR		dNOOP
#endif


/* This stuff is not part of the API! You have been warned. */
#ifndef PERL_VERSION_DECIMAL
#  define PERL_VERSION_DECIMAL(r,v,s) (r*1000000 + v*1000 + s)
#endif
#ifndef PERL_DECIMAL_VERSION
#  define PERL_DECIMAL_VERSION \
	  PERL_VERSION_DECIMAL(PERL_REVISION,PERL_VERSION,PERL_SUBVERSION)
#endif
#ifndef PERL_VERSION_GE
#  define PERL_VERSION_GE(r,v,s) \
	  (PERL_DECIMAL_VERSION >= PERL_VERSION_DECIMAL(r,v,s))
#endif
#ifndef PERL_VERSION_LE
#  define PERL_VERSION_LE(r,v,s) \
	  (PERL_DECIMAL_VERSION <= PERL_VERSION_DECIMAL(r,v,s))
#endif

/* XS_INTERNAL is the explicit static-linkage variant of the default
 * XS macro.
 *
 * XS_EXTERNAL is the same as XS_INTERNAL except it does not include
 * "STATIC", ie. it exports XSUB symbols. You probably don't want that
 * for anything but the BOOT XSUB.
 *
 * See XSUB.h in core!
 */


/* TODO: This might be compatible further back than 5.10.0. */
#if PERL_VERSION_GE(5, 10, 0) && PERL_VERSION_LE(5, 15, 1)
#  undef XS_EXTERNAL
#  undef XS_INTERNAL
#  if defined(__CYGWIN__) && defined(USE_DYNAMIC_LOADING)
#    define XS_EXTERNAL(name) __declspec(dllexport) XSPROTO(name)
#    define XS_INTERNAL(name) STATIC XSPROTO(name)
#  endif
#  if defined(__SYMBIAN32__)
#    define XS_EXTERNAL(name) EXPORT_C XSPROTO(name)
#    define XS_INTERNAL(name) EXPORT_C STATIC XSPROTO(name)
#  endif
#  ifndef XS_EXTERNAL
#    if defined(HASATTRIBUTE_UNUSED) && !defined(__cplusplus)
#      define XS_EXTERNAL(name) void name(pTHX_ CV* cv __attribute__unused__)
#      define XS_INTERNAL(name) STATIC void name(pTHX_ CV* cv __attribute__unused__)
#    else
#      ifdef __cplusplus
#        define XS_EXTERNAL(name) extern "C" XSPROTO(name)
#        define XS_INTERNAL(name) static XSPROTO(name)
#      else
#        define XS_EXTERNAL(name) XSPROTO(name)
#        define XS_INTERNAL(name) STATIC XSPROTO(name)
#      endif
#    endif
#  endif
#endif

/* perl >= 5.10.0 && perl <= 5.15.1 */


/* The XS_EXTERNAL macro is used for functions that must not be static
 * like the boot XSUB of a module. If perl didn't have an XS_EXTERNAL
 * macro defined, the best we can do is assume XS is the same.
 * Dito for XS_INTERNAL.
 */
#ifndef XS_EXTERNAL
#  define XS_EXTERNAL(name) XS(name)
#endif
#ifndef XS_INTERNAL
#  define XS_INTERNAL(name) XS(name)
#endif

/* Now, finally, after all this mess, we want an ExtUtils::ParseXS
 * internal macro that we're free to redefine for varying linkage due
 * to the EXPORT_XSUB_SYMBOLS XS keyword. This is internal, use
 * XS_EXTERNAL(name) or XS_INTERNAL(name) in your code if you need to!
 */

#undef XS_EUPXS
#if defined(PERL_EUPXS_ALWAYS_EXPORT)
#  define XS_EUPXS(name) XS_EXTERNAL(name)
#else
   /* default to internal */
#  define XS_EUPXS(name) XS_INTERNAL(name)
#endif

#ifndef PERL_ARGS_ASSERT_CROAK_XS_USAGE
#define PERL_ARGS_ASSERT_CROAK_XS_USAGE assert(cv); assert(params)

/* prototype to pass -Wmissing-prototypes */
STATIC void
S_croak_xs_usage(const CV *const cv, const char *const params);

STATIC void
S_croak_xs_usage(const CV *const cv, const char *const params)
{
    const GV *const gv = CvGV(cv);

    PERL_ARGS_ASSERT_CROAK_XS_USAGE;

    if (gv) {
        const char *const gvname = GvNAME(gv);
        const HV *const stash = GvSTASH(gv);
        const char *const hvname = stash ? HvNAME(stash) : NULL;

        if (hvname)
	    Perl_croak_nocontext("Usage: %s::%s(%s)", hvname, gvname, params);
        else
	    Perl_croak_nocontext("Usage: %s(%s)", gvname, params);
    } else {
        /* Pants. I don't think that it should be possible to get here. */
	Perl_croak_nocontext("Usage: CODE(0x%" UVxf ")(%s)", PTR2UV(cv), params);
    }
}
#undef  PERL_ARGS_ASSERT_CROAK_XS_USAGE

#define croak_xs_usage        S_croak_xs_usage

#endif

/* NOTE: the prototype of newXSproto() is different in versions of perls,
 * so we define a portable version of newXSproto()
 */
#ifdef newXS_flags
#define newXSproto_portable(name, c_impl, file, proto) newXS_flags(name, c_impl, file, proto, 0)
#else
#define newXSproto_portable(name, c_impl, file, proto) (PL_Sv=(SV*)newXS(name, c_impl, file), sv_setpv(PL_Sv, proto), (CV*)PL_Sv)
#endif /* !defined(newXS_flags) */

#if PERL_VERSION_LE(5, 21, 5)
#  define newXS_deffile(a,b) Perl_newXS(aTHX_ a,b,file)
#else
#  define newXS_deffile(a,b) Perl_newXS_deffile(aTHX_ a,b)
#endif

#line 181 "COW.c"

XS_EUPXS(XS_B__COW_can_cow); /* prototype to pass -Wmissing-prototypes */
XS_EUPXS(XS_B__COW_can_cow)
{
    dVAR; dXSARGS;
    if (items != 0)
       croak_xs_usage(cv,  "");
    {
	SV *	RETVAL;
#line 32 "COW.xs"
{
#if B_CAN_COW
    XSRETURN_YES;
#else
    XSRETURN_NO;
#endif
}
#line 199 "COW.c"
	RETVAL = sv_2mortal(RETVAL);
	ST(0) = RETVAL;
    }
    XSRETURN(1);
}


XS_EUPXS(XS_B__COW_is_cow); /* prototype to pass -Wmissing-prototypes */
XS_EUPXS(XS_B__COW_is_cow)
{
    dVAR; dXSARGS;
    if (items != 1)
       croak_xs_usage(cv,  "sv");
    {
	SV *	sv = ST(0)
;
	SV *	RETVAL;
#line 46 "COW.xs"
{
/* not exactly accurate but let's start there  */
#if !B_CAN_COW
    XSRETURN_UNDEF;
#else
    if ( SvPOK(sv) && SvIsCOW(sv) ) XSRETURN_YES;
#endif
    XSRETURN_NO;
}
#line 227 "COW.c"
	RETVAL = sv_2mortal(RETVAL);
	ST(0) = RETVAL;
    }
    XSRETURN(1);
}


XS_EUPXS(XS_B__COW_cowrefcnt); /* prototype to pass -Wmissing-prototypes */
XS_EUPXS(XS_B__COW_cowrefcnt)
{
    dVAR; dXSARGS;
    if (items != 1)
       croak_xs_usage(cv,  "sv");
    {
	SV *	sv = ST(0)
;
	SV *	RETVAL;
#line 62 "COW.xs"
{
#if !B_CAN_COW
    XSRETURN_UNDEF;
#else
    if ( SvIsCOW(sv) ) XSRETURN_IV( myCowREFCNT(sv) );
#endif
    XSRETURN_UNDEF;
}
#line 254 "COW.c"
	RETVAL = sv_2mortal(RETVAL);
	ST(0) = RETVAL;
    }
    XSRETURN(1);
}


XS_EUPXS(XS_B__COW_cowrefcnt_max); /* prototype to pass -Wmissing-prototypes */
XS_EUPXS(XS_B__COW_cowrefcnt_max)
{
    dVAR; dXSARGS;
    if (items != 0)
       croak_xs_usage(cv,  "");
    {
	SV *	RETVAL;
#line 76 "COW.xs"
{
#if !B_CAN_COW
    XSRETURN_UNDEF;
#else  
  XSRETURN_IV(SV_COW_REFCNT_MAX);
#endif
}
#line 278 "COW.c"
	RETVAL = sv_2mortal(RETVAL);
	ST(0) = RETVAL;
    }
    XSRETURN(1);
}

#ifdef __cplusplus
extern "C"
#endif
XS_EXTERNAL(boot_B__COW); /* prototype to pass -Wmissing-prototypes */
XS_EXTERNAL(boot_B__COW)
{
#if PERL_VERSION_LE(5, 21, 5)
    dVAR; dXSARGS;
#else
    dVAR; dXSBOOTARGSXSAPIVERCHK;
#endif
#if (PERL_REVISION == 5 && PERL_VERSION < 9)
    char* file = __FILE__;
#else
    const char* file = __FILE__;
#endif

    PERL_UNUSED_VAR(file);

    PERL_UNUSED_VAR(cv); /* -W */
    PERL_UNUSED_VAR(items); /* -W */
#if PERL_VERSION_LE(5, 21, 5)
    XS_VERSION_BOOTCHECK;
#  ifdef XS_APIVERSION_BOOTCHECK
    XS_APIVERSION_BOOTCHECK;
#  endif
#endif

        newXS_deffile("B::COW::can_cow", XS_B__COW_can_cow);
        newXS_deffile("B::COW::is_cow", XS_B__COW_is_cow);
        newXS_deffile("B::COW::cowrefcnt", XS_B__COW_cowrefcnt);
        newXS_deffile("B::COW::cowrefcnt_max", XS_B__COW_cowrefcnt_max);
#if PERL_VERSION_LE(5, 21, 5)
#  if PERL_VERSION_GE(5, 9, 0)
    if (PL_unitcheckav)
        call_list(PL_scopestack_ix, PL_unitcheckav);
#  endif
    XSRETURN_YES;
#else
    Perl_xs_boot_epilog(aTHX_ ax);
#endif
}