[perl5.git] / perl.h

/*    perl.h
 *
 *    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
 *    2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 *
 */

#ifndef H_PERL
#define H_PERL 1

#ifdef PERL_FOR_X2P
/*
 * This file is being used for x2p stuff.
 * Above symbol is defined via -D in 'x2p/Makefile.SH'
 * Decouple x2p stuff from some of perls more extreme eccentricities.
 */
#undef MULTIPLICITY
#undef USE_STDIO
#define USE_STDIO
#endif /* PERL_FOR_X2P */

#ifdef PERL_MICRO
#   include "uconfig.h"
#else
#   include "config.h"
#endif

/* this is used for functions which take a depth trailing
 * argument under debugging */
#ifdef DEBUGGING
#define _pDEPTH ,U32 depth
#define _aDEPTH ,depth
#else
#define _pDEPTH
#define _aDEPTH
#endif

/* NOTE 1: that with gcc -std=c89 the __STDC_VERSION__ is *not* defined
 * because the __STDC_VERSION__ became a thing only with C90.  Therefore,
 * with gcc, HAS_C99 will never become true as long as we use -std=c89.

 * NOTE 2: headers lie.  Do not expect that if HAS_C99 gets to be true,
 * all the C99 features are there and are correct. */
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
    defined(_STDC_C99) || defined(__c99)
#  define HAS_C99 1
#endif

/* See L<perlguts/"The Perl API"> for detailed notes on
 * PERL_IMPLICIT_CONTEXT and PERL_IMPLICIT_SYS */

/* XXX NOTE that from here --> to <-- the same logic is
 * repeated in makedef.pl, so be certain to update
 * both places when editing. */

#ifdef USE_ITHREADS
#  if !defined(MULTIPLICITY)
#    define MULTIPLICITY
#  endif
#endif

#ifdef PERL_GLOBAL_STRUCT_PRIVATE
#  ifndef PERL_GLOBAL_STRUCT
#    define PERL_GLOBAL_STRUCT
#  endif
#endif

#ifdef PERL_GLOBAL_STRUCT
#  ifndef MULTIPLICITY
#    define MULTIPLICITY
#  endif
#endif

#ifdef MULTIPLICITY
#  ifndef PERL_IMPLICIT_CONTEXT
#    define PERL_IMPLICIT_CONTEXT
#  endif
#endif

/* undef WIN32 when building on Cygwin (for libwin32) - gph */
#ifdef __CYGWIN__
#   undef WIN32
#   undef _WIN32
#endif

#if defined(__SYMBIAN32__) || (defined(__VC32__) && defined(WINS))
#   ifndef SYMBIAN
#       define SYMBIAN
#   endif
#endif

#ifdef __SYMBIAN32__
#  include "symbian/symbian_proto.h"
#endif

/* Any stack-challenged places.  The limit varies (and often
 * is configurable), but using more than a kilobyte of stack
 * is usually dubious in these systems. */
#if defined(__SYMBIAN32__)
/* Symbian: need to work around the SDK features. *
 * On WINS: MS VC5 generates calls to _chkstk,         *
 * if a "large" stack frame is allocated.              *
 * gcc on MARM does not generate calls like these.     */
#   define USE_HEAP_INSTEAD_OF_STACK
#endif

/* Use the reentrant APIs like localtime_r and getpwent_r */
/* Win32 has naturally threadsafe libraries, no need to use any _r variants.
 * XXX KEEP makedef.pl copy of this code in sync */
#if defined(USE_ITHREADS) && !defined(USE_REENTRANT_API) && !defined(NETWARE) && !defined(WIN32)
#   define USE_REENTRANT_API
#endif

/* <--- here ends the logic shared by perl.h and makedef.pl */

/* Microsoft Visual C++ 6.0 needs special treatment in numerous places */
#if defined(WIN32) && defined(_MSC_VER) && _MSC_VER >= 1200 && _MSC_VER < 1300
#  define USING_MSVC6
#endif

#undef START_EXTERN_C
#undef END_EXTERN_C
#undef EXTERN_C
#ifdef __cplusplus
#  define START_EXTERN_C extern "C" {
#  define END_EXTERN_C }
#  define EXTERN_C extern "C"
#else
#  define START_EXTERN_C
#  define END_EXTERN_C
#  define EXTERN_C extern
#endif

/* Fallback definitions in case we don't have definitions from config.h.
   This should only matter for systems that don't use Configure and
   haven't been modified to define PERL_STATIC_INLINE yet.
*/
#if !defined(PERL_STATIC_INLINE)
#  ifdef HAS_STATIC_INLINE
#    define PERL_STATIC_INLINE static inline
#  else
#    define PERL_STATIC_INLINE static
#  endif
#endif

#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GET_VARS)
#    ifdef PERL_GLOBAL_STRUCT_PRIVATE
       EXTERN_C struct perl_vars* Perl_GetVarsPrivate();
#      define PERL_GET_VARS() Perl_GetVarsPrivate() /* see miniperlmain.c */
#    else
#      define PERL_GET_VARS() PL_VarsPtr
#    endif
#endif

/* this used to be off by default, now its on, see perlio.h */
#define PERLIO_FUNCS_CONST

#define pVAR    struct perl_vars* my_vars PERL_UNUSED_DECL

#ifdef PERL_GLOBAL_STRUCT
#  define dVAR		pVAR    = (struct perl_vars*)PERL_GET_VARS()
#else
#  define dVAR		dNOOP
#endif

#ifdef PERL_IMPLICIT_CONTEXT
#  ifndef MULTIPLICITY
#    define MULTIPLICITY
#  endif
#  define tTHX	PerlInterpreter*
#  define pTHX  tTHX my_perl PERL_UNUSED_DECL
#  define aTHX	my_perl
#  define aTHXa(a) aTHX = (tTHX)a
#  ifdef PERL_GLOBAL_STRUCT
#    define dTHXa(a)	dVAR; pTHX = (tTHX)a
#  else
#    define dTHXa(a)	pTHX = (tTHX)a
#  endif
#  ifdef PERL_GLOBAL_STRUCT
#    define dTHX		dVAR; pTHX = PERL_GET_THX
#  else
#    define dTHX		pTHX = PERL_GET_THX
#  endif
#  define pTHX_		pTHX,
#  define aTHX_		aTHX,
#  define pTHX_1	2
#  define pTHX_2	3
#  define pTHX_3	4
#  define pTHX_4	5
#  define pTHX_5	6
#  define pTHX_6	7
#  define pTHX_7	8
#  define pTHX_8	9
#  define pTHX_9	10
#  define pTHX_12	13
#  if defined(DEBUGGING) && !defined(PERL_TRACK_MEMPOOL)
#    define PERL_TRACK_MEMPOOL
#  endif
#else
#  undef PERL_TRACK_MEMPOOL
#endif

#ifdef DEBUGGING
#  define dTHX_DEBUGGING dTHX
#else
#  define dTHX_DEBUGGING dNOOP
#endif

#define STATIC static

#ifndef PERL_CORE
/* Do not use these macros. They were part of PERL_OBJECT, which was an
 * implementation of multiplicity using C++ objects. They have been left
 * here solely for the sake of XS code which has incorrectly
 * cargo-culted them.
 */
#define CPERLscope(x) x
#define CPERLarg void
#define CPERLarg_
#define _CPERLarg
#define PERL_OBJECT_THIS
#define _PERL_OBJECT_THIS
#define PERL_OBJECT_THIS_
#define CALL_FPTR(fptr) (*fptr)
#define MEMBER_TO_FPTR(name) name
#endif /* !PERL_CORE */

#define CALLRUNOPS  PL_runops

#define CALLREGCOMP(sv, flags) Perl_pregcomp(aTHX_ (sv),(flags))

#define CALLREGCOMP_ENG(prog, sv, flags) (prog)->comp(aTHX_ sv, flags)
#define CALLREGEXEC(prog,stringarg,strend,strbeg,minend,sv,data,flags) \
    RX_ENGINE(prog)->exec(aTHX_ (prog),(stringarg),(strend), \
        (strbeg),(minend),(sv),(data),(flags))
#define CALLREG_INTUIT_START(prog,sv,strbeg,strpos,strend,flags,data) \
    RX_ENGINE(prog)->intuit(aTHX_ (prog), (sv), (strbeg), (strpos), \
        (strend),(flags),(data))
#define CALLREG_INTUIT_STRING(prog) \
    RX_ENGINE(prog)->checkstr(aTHX_ (prog))

#define CALLREGFREE(prog) \
    Perl_pregfree(aTHX_ (prog))

#define CALLREGFREE_PVT(prog) \
    if(prog) RX_ENGINE(prog)->rxfree(aTHX_ (prog))

#define CALLREG_NUMBUF_FETCH(rx,paren,usesv)                                \
    RX_ENGINE(rx)->numbered_buff_FETCH(aTHX_ (rx),(paren),(usesv))

#define CALLREG_NUMBUF_STORE(rx,paren,value) \
    RX_ENGINE(rx)->numbered_buff_STORE(aTHX_ (rx),(paren),(value))

#define CALLREG_NUMBUF_LENGTH(rx,sv,paren)                              \
    RX_ENGINE(rx)->numbered_buff_LENGTH(aTHX_ (rx),(sv),(paren))

#define CALLREG_NAMED_BUFF_FETCH(rx, key, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), (key), NULL, ((flags) | RXapif_FETCH))

#define CALLREG_NAMED_BUFF_STORE(rx, key, value, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), (key), (value), ((flags) | RXapif_STORE))

#define CALLREG_NAMED_BUFF_DELETE(rx, key, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx),(key), NULL, ((flags) | RXapif_DELETE))

#define CALLREG_NAMED_BUFF_CLEAR(rx, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), NULL, NULL, ((flags) | RXapif_CLEAR))

#define CALLREG_NAMED_BUFF_EXISTS(rx, key, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), (key), NULL, ((flags) | RXapif_EXISTS))

#define CALLREG_NAMED_BUFF_FIRSTKEY(rx, flags) \
    RX_ENGINE(rx)->named_buff_iter(aTHX_ (rx), NULL, ((flags) | RXapif_FIRSTKEY))

#define CALLREG_NAMED_BUFF_NEXTKEY(rx, lastkey, flags) \
    RX_ENGINE(rx)->named_buff_iter(aTHX_ (rx), (lastkey), ((flags) | RXapif_NEXTKEY))

#define CALLREG_NAMED_BUFF_SCALAR(rx, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), NULL, NULL, ((flags) | RXapif_SCALAR))

#define CALLREG_NAMED_BUFF_COUNT(rx) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), NULL, NULL, RXapif_REGNAMES_COUNT)

#define CALLREG_NAMED_BUFF_ALL(rx, flags) \
    RX_ENGINE(rx)->named_buff(aTHX_ (rx), NULL, NULL, flags)

#define CALLREG_PACKAGE(rx) \
    RX_ENGINE(rx)->qr_package(aTHX_ (rx))

#if defined(USE_ITHREADS)
#define CALLREGDUPE(prog,param) \
    Perl_re_dup(aTHX_ (prog),(param))

#define CALLREGDUPE_PVT(prog,param) \
    (prog ? RX_ENGINE(prog)->dupe(aTHX_ (prog),(param)) \
          : (REGEXP *)NULL)
#endif


/*
 * Because of backward compatibility reasons the PERL_UNUSED_DECL
 * cannot be changed from postfix to PERL_UNUSED_DECL(x).  Sigh.
 *
 * Note that there are C compilers such as MetroWerks CodeWarrior
 * which do not have an "inlined" way (like the gcc __attribute__) of
 * marking unused variables (they need e.g. a #pragma) and therefore
 * cpp macros like PERL_UNUSED_DECL cannot work for this purpose, even
 * if it were PERL_UNUSED_DECL(x), which it cannot be (see above).
 *
 */

#if defined(__SYMBIAN32__) && defined(__GNUC__)
#  ifdef __cplusplus
#    define PERL_UNUSED_DECL
#  else
#    define PERL_UNUSED_DECL __attribute__((unused))
#  endif
#endif

#ifndef PERL_UNUSED_DECL
#  if defined(HASATTRIBUTE_UNUSED) && (!defined(__cplusplus) || __GNUC__ >= 4)
#    define PERL_UNUSED_DECL __attribute__unused__
#  else
#    define PERL_UNUSED_DECL
#  endif
#endif

/* gcc -Wall:
 * for silencing unused variables that are actually used most of the time,
 * but we cannot quite get rid of, such as "ax" in PPCODE+noargs xsubs,
 * or variables/arguments that are used only in certain configurations.
 */
#ifndef PERL_UNUSED_ARG
#  define PERL_UNUSED_ARG(x) ((void)sizeof(x))
#endif
#ifndef PERL_UNUSED_VAR
#  define PERL_UNUSED_VAR(x) ((void)sizeof(x))
#endif

#if defined(USE_ITHREADS) || defined(PERL_GLOBAL_STRUCT)
#  define PERL_UNUSED_CONTEXT PERL_UNUSED_ARG(my_perl)
#else
#  define PERL_UNUSED_CONTEXT
#endif

/* gcc (-ansi) -pedantic doesn't allow gcc statement expressions,
 * g++ allows them but seems to have problems with them
 * (insane errors ensue).
 * g++ does not give insane errors now (RMB 2008-01-30, gcc 4.2.2).
 */
#if defined(PERL_GCC_PEDANTIC) || \
    (defined(__GNUC__) && defined(__cplusplus) && \
	((__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ < 2))))
#  ifndef PERL_GCC_BRACE_GROUPS_FORBIDDEN
#    define PERL_GCC_BRACE_GROUPS_FORBIDDEN
#  endif
#endif

/* Use PERL_UNUSED_RESULT() to suppress the warnings about unused results
 * of function calls, e.g. PERL_UNUSED_RESULT(foo(a, b)).
 *
 * The main reason for this is that the combination of gcc -Wunused-result
 * (part of -Wall) and the __attribute__((warn_unused_result)) cannot
 * be silenced with casting to void.  This causes trouble when the system
 * header files use the attribute.
 *
 * Use PERL_UNUSED_RESULT sparingly, though, since usually the warning
 * is there for a good reason: you might lose success/failure information,
 * or leak resources, or changes in resources.
 *
 * But sometimes you just want to ignore the return value, e.g. on
 * codepaths soon ending up in abort, or in "best effort" attempts,
 * or in situations where there is no good way to handle failures.
 *
 * Sometimes PERL_UNUSED_RESULT might not be the most natural way:
 * another possibility is that you can capture the return value
 * and use PERL_UNUSED_VAR on that.
 *
 * The __typeof__() is used instead of typeof() since typeof() is not
 * available under strict C89, and because of compilers masquerading
 * as gcc (clang and icc), we want exactly the gcc extension
 * __typeof__ and nothing else.
 */
#ifndef PERL_UNUSED_RESULT
#  if defined(__GNUC__) && defined(HASATTRIBUTE_WARN_UNUSED_RESULT)
#    define PERL_UNUSED_RESULT(v) STMT_START { __typeof__(v) z = (v); (void)sizeof(z); } STMT_END
#  else
#    define PERL_UNUSED_RESULT(v) ((void)(v))
#  endif
#endif

/* on gcc (and clang), specify that a warning should be temporarily
 * ignored; e.g.
 *
 *    GCC_DIAG_IGNORE_DECL(-Wmultichar);
 *    char b = 'ab';
 *    GCC_DIAG_RESTORE_DECL;
 *
 * based on http://dbp-consulting.com/tutorials/SuppressingGCCWarnings.html
 *
 * Note that "pragma GCC diagnostic push/pop" was added in GCC 4.6, Mar 2011;
 * clang only pretends to be GCC 4.2, but still supports push/pop.
 *
 * Note on usage: all macros must be used at a place where a declaration
 * or statement can occur, i.e., not in the middle of an expression.
 * *_DIAG_IGNORE() and *_DIAG_RESTORE can be used in any such place, but
 * must be used without a following semicolon.  *_DIAG_IGNORE_DECL() and
 * *_DIAG_RESTORE_DECL must be used with a following semicolon, and behave
 * syntactically as declarations (like dNOOP).  *_DIAG_IGNORE_STMT()
 * and *_DIAG_RESTORE_STMT must be used with a following semicolon,
 * and behave syntactically as statements (like NOOP).
 *
 */

#if defined(__clang__) || defined(__clang) || \
       (defined( __GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406)
#  define GCC_DIAG_PRAGMA(x) _Pragma (#x)
/* clang has "clang diagnostic" pragmas, but also understands gcc. */
#  define GCC_DIAG_IGNORE(x) _Pragma("GCC diagnostic push") \
                             GCC_DIAG_PRAGMA(GCC diagnostic ignored #x)
#  define GCC_DIAG_RESTORE   _Pragma("GCC diagnostic pop")
#else
#  define GCC_DIAG_IGNORE(w)
#  define GCC_DIAG_RESTORE
#endif
#define GCC_DIAG_IGNORE_DECL(x) GCC_DIAG_IGNORE(x) dNOOP
#define GCC_DIAG_RESTORE_DECL GCC_DIAG_RESTORE dNOOP
#define GCC_DIAG_IGNORE_STMT(x) GCC_DIAG_IGNORE(x) NOOP
#define GCC_DIAG_RESTORE_STMT GCC_DIAG_RESTORE NOOP
/* for clang specific pragmas */
#if defined(__clang__) || defined(__clang)
#  define CLANG_DIAG_PRAGMA(x) _Pragma (#x)
#  define CLANG_DIAG_IGNORE(x) _Pragma("clang diagnostic push") \
                               CLANG_DIAG_PRAGMA(clang diagnostic ignored #x)
#  define CLANG_DIAG_RESTORE   _Pragma("clang diagnostic pop")
#else
#  define CLANG_DIAG_IGNORE(w)
#  define CLANG_DIAG_RESTORE
#endif
#define CLANG_DIAG_IGNORE_DECL(x) CLANG_DIAG_IGNORE(x) dNOOP
#define CLANG_DIAG_RESTORE_DECL CLANG_DIAG_RESTORE dNOOP
#define CLANG_DIAG_IGNORE_STMT(x) CLANG_DIAG_IGNORE(x) NOOP
#define CLANG_DIAG_RESTORE_STMT CLANG_DIAG_RESTORE NOOP

#define NOOP /*EMPTY*/(void)0
#define dNOOP struct Perl___notused_struct

#ifndef pTHX
/* Don't bother defining tTHX ; using it outside
 * code guarded by PERL_IMPLICIT_CONTEXT is an error.
 */
#  define pTHX		void
#  define pTHX_
#  define aTHX
#  define aTHX_
#  define aTHXa(a)      NOOP
#  define dTHXa(a)	dNOOP
#  define dTHX		dNOOP
#  define pTHX_1	1	
#  define pTHX_2	2
#  define pTHX_3	3
#  define pTHX_4	4
#  define pTHX_5	5
#  define pTHX_6	6
#  define pTHX_7	7
#  define pTHX_8	8
#  define pTHX_9	9
#  define pTHX_12	12
#endif

#ifndef dVAR
#  define dVAR		dNOOP
#endif

/* these are only defined for compatibility; should not be used internally */
#if !defined(pTHXo) && !defined(PERL_CORE)
#  define pTHXo		pTHX
#  define pTHXo_	pTHX_
#  define aTHXo		aTHX
#  define aTHXo_	aTHX_
#  define dTHXo		dTHX
#  define dTHXoa(x)	dTHXa(x)
#endif

#ifndef pTHXx
#  define pTHXx		PerlInterpreter *my_perl
#  define pTHXx_	pTHXx,
#  define aTHXx		my_perl
#  define aTHXx_	aTHXx,
#  define dTHXx		dTHX
#endif

/* Under PERL_IMPLICIT_SYS (used in Windows for fork emulation)
 * PerlIO_foo() expands to PL_StdIO->pFOO(PL_StdIO, ...).
 * dTHXs is therefore needed for all functions using PerlIO_foo(). */
#ifdef PERL_IMPLICIT_SYS
#  ifdef PERL_GLOBAL_STRUCT_PRIVATE
#    define dTHXs		dVAR; dTHX
#  else
#    define dTHXs		dTHX
#  endif
#else
#  ifdef PERL_GLOBAL_STRUCT_PRIVATE
#    define dTHXs		dVAR
#  else
#    define dTHXs		dNOOP
#  endif
#endif

#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) && !defined(__cplusplus)
#  ifndef PERL_USE_GCC_BRACE_GROUPS
#    define PERL_USE_GCC_BRACE_GROUPS
#  endif
#endif

/*
 * STMT_START { statements; } STMT_END;
 * can be used as a single statement, as in
 * if (x) STMT_START { ... } STMT_END; else ...
 *
 * Trying to select a version that gives no warnings...
 */
#if !(defined(STMT_START) && defined(STMT_END))
# ifdef PERL_USE_GCC_BRACE_GROUPS
#   define STMT_START	(void)(	/* gcc supports "({ STATEMENTS; })" */
#   define STMT_END	)
# else
#   define STMT_START	do
#   define STMT_END	while (0)
# endif
#endif

#ifndef BYTEORDER  /* Should never happen -- byteorder is in config.h */
#   define BYTEORDER 0x1234
#endif

/* Overall memory policy? */
#ifndef CONSERVATIVE
#   define LIBERAL 1
#endif

#if 'A' == 65 && 'I' == 73 && 'J' == 74 && 'Z' == 90
#define ASCIIish
#else
#undef  ASCIIish
#endif

/*
 * The following contortions are brought to you on behalf of all the
 * standards, semi-standards, de facto standards, not-so-de-facto standards
 * of the world, as well as all the other botches anyone ever thought of.
 * The basic theory is that if we work hard enough here, the rest of the
 * code can be a lot prettier.  Well, so much for theory.  Sorry, Henry...
 */

/* define this once if either system, instead of cluttering up the src */
#if defined(MSDOS) || defined(WIN32) || defined(NETWARE)
#define DOSISH 1
#endif

/* These exist only for back-compat with XS modules. */
#ifndef PERL_CORE
#define VOL volatile
#define CAN_PROTOTYPE
#define _(args) args
#define I_LIMITS
#define I_STDARG
#define STANDARD_C
#endif

/* By compiling a perl with -DNO_TAINT_SUPPORT or -DSILENT_NO_TAINT_SUPPORT,
 * you get a perl without taint support, but doubtlessly with a lesser
 * degree of support. Do not do so unless you know exactly what it means
 * technically, have a good reason to do so, and know exactly how the
 * perl will be used. perls with -DSILENT_NO_TAINT_SUPPORT are considered
 * a potential security risk due to flat out ignoring the security-relevant
 * taint flags. This being said, a perl without taint support compiled in
 * has marginal run-time performance benefits.
 * SILENT_NO_TAINT_SUPPORT implies NO_TAINT_SUPPORT.
 * SILENT_NO_TAINT_SUPPORT is the same as NO_TAINT_SUPPORT except it
 * silently ignores -t/-T instead of throwing an exception.
 *
 * DANGER! Using NO_TAINT_SUPPORT or SILENT_NO_TAINT_SUPPORT
 *         voids your nonexistent warranty!
 */
#if defined(SILENT_NO_TAINT_SUPPORT) && !defined(NO_TAINT_SUPPORT)
#  define NO_TAINT_SUPPORT 1
#endif

/* NO_TAINT_SUPPORT can be set to transform virtually all taint-related
 * operations into no-ops for a very modest speed-up. Enable only if you
 * know what you're doing: tests and CPAN modules' tests are bound to fail.
 */
#ifdef NO_TAINT_SUPPORT
#   define TAINT		NOOP
#   define TAINT_NOT		NOOP
#   define TAINT_IF(c)		NOOP
#   define TAINT_ENV()		NOOP
#   define TAINT_PROPER(s)	NOOP
#   define TAINT_set(s)		NOOP
#   define TAINT_get		0
#   define TAINTING_get		0
#   define TAINTING_set(s)	NOOP
#   define TAINT_WARN_get       0
#   define TAINT_WARN_set(s)    NOOP
#else
#   define TAINT		(PL_tainted = PL_tainting)
#   define TAINT_NOT	(PL_tainted = FALSE)
#   define TAINT_IF(c)	if (UNLIKELY(c)) { PL_tainted = PL_tainting; }
#   define TAINT_ENV()	if (UNLIKELY(PL_tainting)) { taint_env(); }
#   define TAINT_PROPER(s)	if (UNLIKELY(PL_tainting)) { taint_proper(NULL, s); }
#   define TAINT_set(s)		(PL_tainted = (s))
#   define TAINT_get		(PL_tainted)
#   define TAINTING_get		(PL_tainting)
#   define TAINTING_set(s)	(PL_tainting = (s))
#   define TAINT_WARN_get       (PL_taint_warn)
#   define TAINT_WARN_set(s)    (PL_taint_warn = (s))
#endif

/* flags used internally only within pp_subst and pp_substcont */
#ifdef PERL_CORE
#  define SUBST_TAINT_STR      1	/* string tainted */
#  define SUBST_TAINT_PAT      2	/* pattern tainted */
#  define SUBST_TAINT_REPL     4	/* replacement tainted */
#  define SUBST_TAINT_RETAINT  8	/* use re'taint' in scope */
#  define SUBST_TAINT_BOOLRET 16	/* return is boolean (don't taint) */
#endif

/* XXX All process group stuff is handled in pp_sys.c.  Should these
   defines move there?  If so, I could simplify this a lot. --AD  9/96.
*/
/* Process group stuff changed from traditional BSD to POSIX.
   perlfunc.pod documents the traditional BSD-style syntax, so we'll
   try to preserve that, if possible.
*/
#ifdef HAS_SETPGID
#  define BSD_SETPGRP(pid, pgrp)	setpgid((pid), (pgrp))
#elif defined(HAS_SETPGRP) && defined(USE_BSD_SETPGRP)
#  define BSD_SETPGRP(pid, pgrp)	setpgrp((pid), (pgrp))
#elif defined(HAS_SETPGRP2)
#  define BSD_SETPGRP(pid, pgrp)	setpgrp2((pid), (pgrp))
#endif
#if defined(BSD_SETPGRP) && !defined(HAS_SETPGRP)
#  define HAS_SETPGRP  /* Well, effectively it does . . . */
#endif

/* getpgid isn't POSIX, but at least Solaris and Linux have it, and it makes
    our life easier :-) so we'll try it.
*/
#ifdef HAS_GETPGID
#  define BSD_GETPGRP(pid)		getpgid((pid))
#elif defined(HAS_GETPGRP) && defined(USE_BSD_GETPGRP)
#  define BSD_GETPGRP(pid)		getpgrp((pid))
#elif defined(HAS_GETPGRP2)
#  define BSD_GETPGRP(pid)		getpgrp2((pid))
#endif
#if defined(BSD_GETPGRP) && !defined(HAS_GETPGRP)
#  define HAS_GETPGRP  /* Well, effectively it does . . . */
#endif

/* These are not exact synonyms, since setpgrp() and getpgrp() may
   have different behaviors, but perl.h used to define USE_BSDPGRP
   (prior to 5.003_05) so some extension might depend on it.
*/
#if defined(USE_BSD_SETPGRP) || defined(USE_BSD_GETPGRP)
#  ifndef USE_BSDPGRP
#    define USE_BSDPGRP
#  endif
#endif

/* HP-UX 10.X CMA (Common Multithreaded Architecture) insists that
   pthread.h must be included before all other header files.
*/
#if defined(USE_ITHREADS) && defined(PTHREAD_H_FIRST) && defined(I_PTHREAD)
#  include <pthread.h>
#endif

#include <sys/types.h>

/* EVC 4 SDK headers includes a bad definition of MB_CUR_MAX in stdlib.h
  which is included from stdarg.h. Bad definition not present in SD 2008
  SDK headers. wince.h is not yet included, so we cant fix this from there
  since by then MB_CUR_MAX will be defined from stdlib.h.
  cewchar.h includes a correct definition of MB_CUR_MAX and it is copied here
  since cewchar.h can't be included this early */
#if defined(UNDER_CE) && (_MSC_VER < 1300)
#  define MB_CUR_MAX 1uL
#endif

# include <stdarg.h>

#ifdef I_STDINT
# include <stdint.h>
#endif

#include <ctype.h>
#include <float.h>
#include <limits.h>

#ifdef METHOD 	/* Defined by OSF/1 v3.0 by ctype.h */
#undef METHOD
#endif

#ifdef PERL_MICRO
#   define NO_LOCALE
#endif

#ifdef I_LOCALE
#   include <locale.h>
#endif

#ifdef I_XLOCALE
#   include <xlocale.h>
#endif

#if !defined(NO_LOCALE) && defined(HAS_SETLOCALE)
#   define USE_LOCALE
#   define HAS_SKIP_LOCALE_INIT /* Solely for XS code to test for this
                                   capability */
#   if !defined(NO_LOCALE_COLLATE) && defined(LC_COLLATE) \
       && defined(HAS_STRXFRM)
#	define USE_LOCALE_COLLATE
#   endif
#   if !defined(NO_LOCALE_CTYPE) && defined(LC_CTYPE)
#	define USE_LOCALE_CTYPE
#   endif
#   if !defined(NO_LOCALE_NUMERIC) && defined(LC_NUMERIC)
#	define USE_LOCALE_NUMERIC
#   endif
#   if !defined(NO_LOCALE_MESSAGES) && defined(LC_MESSAGES)
#	define USE_LOCALE_MESSAGES
#   endif
#   if !defined(NO_LOCALE_MONETARY) && defined(LC_MONETARY)
#	define USE_LOCALE_MONETARY
#   endif
#   if !defined(NO_LOCALE_TIME) && defined(LC_TIME)
#	define USE_LOCALE_TIME
#   endif
#   if !defined(NO_LOCALE_ADDRESS) && defined(LC_ADDRESS)
#	define USE_LOCALE_ADDRESS
#   endif
#   if !defined(NO_LOCALE_IDENTIFICATION) && defined(LC_IDENTIFICATION)
#	define USE_LOCALE_IDENTIFICATION
#   endif
#   if !defined(NO_LOCALE_MEASUREMENT) && defined(LC_MEASUREMENT)
#	define USE_LOCALE_MEASUREMENT
#   endif
#   if !defined(NO_LOCALE_PAPER) && defined(LC_PAPER)
#	define USE_LOCALE_PAPER
#   endif
#   if !defined(NO_LOCALE_TELEPHONE) && defined(LC_TELEPHONE)
#	define USE_LOCALE_TELEPHONE
#   endif
#endif /* !NO_LOCALE && HAS_SETLOCALE */

/* XXX The next few defines are unfortunately duplicated in makedef.pl, and
 * changes here MUST also be made there */

#ifdef USE_LOCALE /* These locale things are all subject to change */
#  if      defined(HAS_NEWLOCALE)               \
      &&   defined(LC_ALL_MASK)                 \
      &&   defined(HAS_FREELOCALE)              \
      &&   defined(HAS_USELOCALE)               \
      && ! defined(NO_POSIX_2008_LOCALE)

    /* For simplicity, the code is written to assume that any platform advanced
     * enough to have the Posix 2008 locale functions has LC_ALL.  The test
     * above makes sure that assumption is valid */

#    define HAS_POSIX_2008_LOCALE
#  endif
#  if     defined(USE_ITHREADS)                                             \
      && (    defined(HAS_POSIX_2008_LOCALE)                                \
          || (defined(WIN32) && defined(_MSC_VER) && _MSC_VER >= 1400))     \
      && ! defined(NO_THREAD_SAFE_LOCALE)
#    define USE_THREAD_SAFE_LOCALE
#    ifdef HAS_POSIX_2008_LOCALE
#      define USE_POSIX_2008_LOCALE
#    endif
#  endif
#endif

/*  Microsoft documentation reads in the change log for VS 2015:
 *     "The localeconv function declared in locale.h now works correctly when
 *     per-thread locale is enabled. In previous versions of the library, this
 *     function would return the lconv data for the global locale, not the
 *     thread's locale."
 */
#if defined(WIN32) && defined(USE_THREAD_SAFE_LOCALE) && _MSC_VER < 1900
#  define TS_W32_BROKEN_LOCALECONV
#endif

#include <setjmp.h>

#ifdef I_SYS_PARAM
#   ifdef PARAM_NEEDS_TYPES
#	include <sys/types.h>
#   endif
#   include <sys/param.h>
#endif

/* On BSD-derived systems, <sys/param.h> defines BSD to a year-month
   value something like 199306.  This may be useful if no more-specific
   feature test is available.
*/
#if defined(BSD)
#   ifndef BSDish
#       define BSDish
#   endif
#endif

/* Use all the "standard" definitions */
#include <stdlib.h>

/* If this causes problems, set i_unistd=undef in the hint file.  */
#ifdef I_UNISTD
#    if defined(__amigaos4__)
#        ifdef I_NETINET_IN
#            include <netinet/in.h>
#        endif
#   endif
#   include <unistd.h>
#   if defined(__amigaos4__)
/* Under AmigaOS 4 newlib.library provides an environ.  However using
 * it doesn't give us enough control over inheritance of variables by
 * subshells etc. so replace with custom version based on abc-shell
 * code. */
extern char **myenviron;
#       undef environ
#       define environ myenviron
#   endif
#endif

/* for WCOREDUMP */
#ifdef I_SYS_WAIT
#   include <sys/wait.h>
#endif

#ifdef __SYMBIAN32__
#   undef _SC_ARG_MAX /* Symbian has _SC_ARG_MAX but no sysconf() */
#endif

#if defined(HAS_SYSCALL) && !defined(HAS_SYSCALL_PROTO)
EXTERN_C int syscall(int, ...);
#endif

#if defined(HAS_USLEEP) && !defined(HAS_USLEEP_PROTO)
EXTERN_C int usleep(unsigned int);
#endif

/* macros for correct constant construction.  These are in C99 <stdint.h>
 * (so they will not be available in strict C89 mode), but they are nice, so
 * let's define them if necessary. */
#ifndef UINT16_C
#  if INTSIZE >= 2
#    define UINT16_C(x) ((U16_TYPE)x##U)
#  else
#    define UINT16_C(x) ((U16_TYPE)x##UL)
#  endif
#endif

#ifndef UINT32_C
#  if INTSIZE >= 4
#    define UINT32_C(x) ((U32_TYPE)x##U)
#  else
#    define UINT32_C(x) ((U32_TYPE)x##UL)
#  endif
#endif

#ifdef I_STDINT
    typedef intmax_t  PERL_INTMAX_T;
    typedef uintmax_t PERL_UINTMAX_T;
#endif

/* N.B.  We use QUADKIND here instead of HAS_QUAD here, because that doesn't
 * actually mean what it has always been documented to mean (see RT #119753)
 * and is explicitly turned off outside of core with dire warnings about
 * removing the undef. */

#if defined(QUADKIND)
#  undef PeRl_INT64_C
#  undef PeRl_UINT64_C
/* Prefer the native integer types (int and long) over long long
 * (which is not C89) and Win32-specific __int64. */
#  if QUADKIND == QUAD_IS_INT && INTSIZE == 8
#    define PeRl_INT64_C(c)	(c)
#    define PeRl_UINT64_C(c)	CAT2(c,U)
#  endif
#  if QUADKIND == QUAD_IS_LONG && LONGSIZE == 8
#    define PeRl_INT64_C(c)	CAT2(c,L)
#    define PeRl_UINT64_C(c)	CAT2(c,UL)
#  endif
#  if QUADKIND == QUAD_IS_LONG_LONG && defined(HAS_LONG_LONG)
#    define PeRl_INT64_C(c)	CAT2(c,LL)
#    define PeRl_UINT64_C(c)	CAT2(c,ULL)
#  endif
#  if QUADKIND == QUAD_IS___INT64
#    define PeRl_INT64_C(c)	CAT2(c,I64)
#    define PeRl_UINT64_C(c)	CAT2(c,UI64)
#  endif
#  ifndef PeRl_INT64_C
#    define PeRl_INT64_C(c)	((I64)(c)) /* last resort */
#    define PeRl_UINT64_C(c)	((U64TYPE)(c))
#  endif
/* In OS X the INT64_C/UINT64_C are defined with LL/ULL, which will
 * not fly with C89-pedantic gcc, so let's undefine them first so that
 * we can redefine them with our native integer preferring versions. */
#  if defined(PERL_DARWIN) && defined(PERL_GCC_PEDANTIC)
#    undef INT64_C
#    undef UINT64_C
#  endif
#  ifndef INT64_C
#    define INT64_C(c) PeRl_INT64_C(c)
#  endif
#  ifndef UINT64_C
#    define UINT64_C(c) PeRl_UINT64_C(c)
#  endif

#  ifndef I_STDINT
    typedef I64TYPE PERL_INTMAX_T;
    typedef U64TYPE PERL_UINTMAX_T;
#  endif
#  ifndef INTMAX_C
#    define INTMAX_C(c) INT64_C(c)
#  endif
#  ifndef UINTMAX_C
#    define UINTMAX_C(c) UINT64_C(c)
#  endif

#else  /* below QUADKIND is undefined */

/* Perl doesn't work on 16 bit systems, so must be 32 bit */
#  ifndef I_STDINT
    typedef I32TYPE PERL_INTMAX_T;
    typedef U32TYPE PERL_UINTMAX_T;
#  endif
#  ifndef INTMAX_C
#    define INTMAX_C(c) INT32_C(c)
#  endif
#  ifndef UINTMAX_C
#    define UINTMAX_C(c) UINT32_C(c)
#  endif

#endif  /* no QUADKIND */

#ifdef PERL_CORE

/* byte-swapping functions for big-/little-endian conversion */
# define _swab_16_(x) ((U16)( \
         (((U16)(x) & UINT16_C(0x00ff)) << 8) | \
         (((U16)(x) & UINT16_C(0xff00)) >> 8) ))

# define _swab_32_(x) ((U32)( \
         (((U32)(x) & UINT32_C(0x000000ff)) << 24) | \
         (((U32)(x) & UINT32_C(0x0000ff00)) <<  8) | \
         (((U32)(x) & UINT32_C(0x00ff0000)) >>  8) | \
         (((U32)(x) & UINT32_C(0xff000000)) >> 24) ))

# ifdef HAS_QUAD
#  define _swab_64_(x) ((U64)( \
          (((U64)(x) & UINT64_C(0x00000000000000ff)) << 56) | \
          (((U64)(x) & UINT64_C(0x000000000000ff00)) << 40) | \
          (((U64)(x) & UINT64_C(0x0000000000ff0000)) << 24) | \
          (((U64)(x) & UINT64_C(0x00000000ff000000)) <<  8) | \
          (((U64)(x) & UINT64_C(0x000000ff00000000)) >>  8) | \
          (((U64)(x) & UINT64_C(0x0000ff0000000000)) >> 24) | \
          (((U64)(x) & UINT64_C(0x00ff000000000000)) >> 40) | \
          (((U64)(x) & UINT64_C(0xff00000000000000)) >> 56) ))
# endif

/* The old value was hard coded at 1008. (4096-16) seems to be a bit faster,
   at least on FreeBSD.  YMMV, so experiment.  */
#ifndef PERL_ARENA_SIZE
#define PERL_ARENA_SIZE 4080
#endif

/* Maximum level of recursion */
#ifndef PERL_SUB_DEPTH_WARN
#define PERL_SUB_DEPTH_WARN 100
#endif

#endif /* PERL_CORE */

/* Maximum number of args that may be passed to an OP_MULTICONCAT op.
 * It determines the size of local arrays in S_maybe_multiconcat() and
 * pp_multiconcat().
 */
#define PERL_MULTICONCAT_MAXARG 64

/* The indexes of fields of a multiconcat aux struct.
 * The fixed fields are followed by nargs+1 const segment lengths,
 * and if utf8 and non-utf8 differ, a second nargs+1 set for utf8.
 */

#define PERL_MULTICONCAT_IX_NARGS     0 /* number of arguments */
#define PERL_MULTICONCAT_IX_PLAIN_PV  1 /* non-utf8 constant string */
#define PERL_MULTICONCAT_IX_PLAIN_LEN 2 /* non-utf8 constant string length */
#define PERL_MULTICONCAT_IX_UTF8_PV   3 /* utf8 constant string */
#define PERL_MULTICONCAT_IX_UTF8_LEN  4 /* utf8 constant string length */
#define PERL_MULTICONCAT_IX_LENGTHS   5 /* first of nargs+1 const segment lens */
#define PERL_MULTICONCAT_HEADER_SIZE 5 /* The number of fields of a
                                           multiconcat header */

/* We no longer default to creating a new SV for GvSV.
   Do this before embed.  */
#ifndef PERL_CREATE_GVSV
#  ifndef PERL_DONT_CREATE_GVSV
#    define PERL_DONT_CREATE_GVSV
#  endif
#endif

#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
#define PERL_USES_PL_PIDSTATUS
#endif

#if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(__SYMBIAN32__)
#define PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
#endif

#define MEM_SIZE Size_t

/* Round all values passed to malloc up, by default to a multiple of
   sizeof(size_t)
*/
#ifndef PERL_STRLEN_ROUNDUP_QUANTUM
#define PERL_STRLEN_ROUNDUP_QUANTUM Size_t_size
#endif

/* sv_grow() will expand strings by at least a certain percentage of
   the previously *used* length to avoid excessive calls to realloc().
   The default is 25% of the current length.
*/
#ifndef PERL_STRLEN_EXPAND_SHIFT
#  define PERL_STRLEN_EXPAND_SHIFT 2
#endif

/* This use of offsetof() requires /Zc:offsetof- for VS2017 (and presumably
 * onwards) when building Socket.xs, but we can just use a different definition
 * for STRUCT_OFFSET instead. */
#if defined(WIN32) && defined(_MSC_VER) && _MSC_VER >= 1910
#  define STRUCT_OFFSET(s,m)  (Size_t)(&(((s *)0)->m))
#else
#  include <stddef.h>
#  define STRUCT_OFFSET(s,m)  offsetof(s,m)
#endif

/* ptrdiff_t is C11, so undef it under pedantic builds */
#ifdef PERL_GCC_PEDANTIC
#   undef HAS_PTRDIFF_T
#endif

#ifndef __SYMBIAN32__
#  include <string.h>
#endif

/* This comes after <stdlib.h> so we don't try to change the standard
 * library prototypes; we'll use our own in proto.h instead. */

#ifdef MYMALLOC
#  ifdef PERL_POLLUTE_MALLOC
#   ifndef PERL_EXTMALLOC_DEF
#    define Perl_malloc		malloc
#    define Perl_calloc		calloc
#    define Perl_realloc	realloc
#    define Perl_mfree		free
#   endif
#  else
#    define EMBEDMYMALLOC	/* for compatibility */
#  endif

#  define safemalloc  Perl_malloc
#  define safecalloc  Perl_calloc
#  define saferealloc Perl_realloc
#  define safefree    Perl_mfree
#  define CHECK_MALLOC_TOO_LATE_FOR_(code)	STMT_START {		\
	if (!TAINTING_get && MallocCfg_ptr[MallocCfg_cfg_env_read])	\
		code;							\
    } STMT_END
#  define CHECK_MALLOC_TOO_LATE_FOR(ch)				\
	CHECK_MALLOC_TOO_LATE_FOR_(MALLOC_TOO_LATE_FOR(ch))
#  define panic_write2(s)		write(2, s, strlen(s))
#  define CHECK_MALLOC_TAINT(newval)				\
	CHECK_MALLOC_TOO_LATE_FOR_(				\
		if (newval) {					\
		  PERL_UNUSED_RESULT(panic_write2("panic: tainting with $ENV{PERL_MALLOC_OPT}\n"));\
		  exit(1); })
#  define MALLOC_CHECK_TAINT(argc,argv,env)	STMT_START {	\
	if (doing_taint(argc,argv,env)) {			\
		MallocCfg_ptr[MallocCfg_skip_cfg_env] = 1;	\
    }} STMT_END;
#else  /* MYMALLOC */
#  define safemalloc  safesysmalloc
#  define safecalloc  safesyscalloc
#  define saferealloc safesysrealloc
#  define safefree    safesysfree
#  define CHECK_MALLOC_TOO_LATE_FOR(ch)		((void)0)
#  define CHECK_MALLOC_TAINT(newval)		((void)0)
#  define MALLOC_CHECK_TAINT(argc,argv,env)
#endif /* MYMALLOC */

/* diag_listed_as: "-T" is on the #! line, it must also be used on the command line */
#define TOO_LATE_FOR_(ch,what)	Perl_croak(aTHX_ "\"-%c\" is on the #! line, it must also be used on the command line%s", (char)(ch), what)
#define TOO_LATE_FOR(ch)	TOO_LATE_FOR_(ch, "")
#define MALLOC_TOO_LATE_FOR(ch)	TOO_LATE_FOR_(ch, " with $ENV{PERL_MALLOC_OPT}")
#define MALLOC_CHECK_TAINT2(argc,argv)	MALLOC_CHECK_TAINT(argc,argv,NULL)

#ifndef memzero
#   define memzero(d,l) memset(d,0,l)
#endif

#ifdef I_NETINET_IN
#   include <netinet/in.h>
#endif

#ifdef I_ARPA_INET
#   include <arpa/inet.h>
#endif

#ifdef I_SYS_STAT
#   include <sys/stat.h>
#endif

/* Microsoft VC's sys/stat.h defines all S_Ixxx macros except S_IFIFO.
   This definition should ideally go into win32/win32.h, but S_IFIFO is
   used later here in perl.h before win32/win32.h is being included. */
#if !defined(S_IFIFO) && defined(_S_IFIFO)
#   define S_IFIFO _S_IFIFO
#endif

/* The stat macros for Unisoft System V/88 (and derivatives
   like UTekV) are broken, sometimes giving false positives.  Undefine
   them here and let the code below set them to proper values.

   The ghs macro stands for GreenHills Software C-1.8.5 which
   is the C compiler for sysV88 and the various derivatives.
   This header file bug is corrected in gcc-2.5.8 and later versions.
   --Kaveh Ghazi (ghazi@noc.rutgers.edu) 10/3/94.  */

#if defined(m88k) && defined(ghs)
#   undef S_ISDIR
#   undef S_ISCHR
#   undef S_ISBLK
#   undef S_ISREG
#   undef S_ISFIFO
#   undef S_ISLNK
#endif

#include <time.h>

#ifdef I_SYS_TIME
#   ifdef I_SYS_TIME_KERNEL
#	define KERNEL
#   endif
#   include <sys/time.h>
#   ifdef I_SYS_TIME_KERNEL
#	undef KERNEL
#   endif
#endif

#if defined(HAS_TIMES) && defined(I_SYS_TIMES)
#    include <sys/times.h>
#endif

#include <errno.h>

#if defined(WIN32) && defined(PERL_IMPLICIT_SYS)
#  define WIN32SCK_IS_STDSCK		/* don't pull in custom wsock layer */
#endif

#if defined(HAS_SOCKET) && !defined(WIN32) /* WIN32 handles sockets via win32.h */
# include <sys/socket.h>
# if defined(USE_SOCKS) && defined(I_SOCKS)
#   if !defined(INCLUDE_PROTOTYPES)
#       define INCLUDE_PROTOTYPES /* for <socks.h> */
#       define PERL_SOCKS_NEED_PROTOTYPES
#   endif
#   include <socks.h>
#   ifdef PERL_SOCKS_NEED_PROTOTYPES /* keep cpp space clean */
#       undef INCLUDE_PROTOTYPES
#       undef PERL_SOCKS_NEED_PROTOTYPES
#   endif
# endif
# ifdef I_NETDB
#  ifdef NETWARE
#   include<stdio.h>
#  endif
#  include <netdb.h>
# endif
# ifndef ENOTSOCK
#  ifdef I_NET_ERRNO
#   include <net/errno.h>
#  endif
# endif
#endif

/* sockatmark() is so new (2001) that many places might have it hidden
 * behind some -D_BLAH_BLAH_SOURCE guard.  The __THROW magic is required
 * e.g. in Gentoo, see http://bugs.gentoo.org/show_bug.cgi?id=12605 */
#if defined(HAS_SOCKATMARK) && !defined(HAS_SOCKATMARK_PROTO)
# if defined(__THROW) && defined(__GLIBC__)
int sockatmark(int) __THROW;
# else
int sockatmark(int);
# endif
#endif

#if defined(__osf__) && defined(__cplusplus) && !defined(_XOPEN_SOURCE_EXTENDED) /* Tru64 "cxx" (C++), see hints/dec_osf.sh for why the _XOPEN_SOURCE_EXTENDED cannot be defined. */
EXTERN_C int fchdir(int);
EXTERN_C int flock(int, int);
EXTERN_C int fseeko(FILE *, off_t, int);
EXTERN_C off_t ftello(FILE *);
#endif

#if defined(__SUNPRO_CC) /* SUNWspro CC (C++) */
EXTERN_C char *crypt(const char *, const char *);
#endif

#if defined(__cplusplus) && defined(__CYGWIN__)
EXTERN_C char *crypt(const char *, const char *);
#endif

#ifdef SETERRNO
# undef SETERRNO  /* SOCKS might have defined this */
#endif

#ifdef VMS
#   define SETERRNO(errcode,vmserrcode) \
	STMT_START {			\
	    set_errno(errcode);		\
	    set_vaxc_errno(vmserrcode);	\
	} STMT_END
#   define dSAVEDERRNO    int saved_errno; unsigned saved_vms_errno
#   define dSAVE_ERRNO    int saved_errno = errno; unsigned saved_vms_errno = vaxc$errno
#   define SAVE_ERRNO     ( saved_errno = errno, saved_vms_errno = vaxc$errno )
#   define RESTORE_ERRNO  SETERRNO(saved_errno, saved_vms_errno)

#   define LIB_INVARG 		LIB$_INVARG
#   define RMS_DIR    		RMS$_DIR
#   define RMS_FAC    		RMS$_FAC
#   define RMS_FEX    		RMS$_FEX
#   define RMS_FNF    		RMS$_FNF
#   define RMS_IFI    		RMS$_IFI
#   define RMS_ISI    		RMS$_ISI
#   define RMS_PRV    		RMS$_PRV
#   define SS_ACCVIO      	SS$_ACCVIO
#   define SS_DEVOFFLINE	SS$_DEVOFFLINE
#   define SS_IVCHAN  		SS$_IVCHAN
#   define SS_NORMAL  		SS$_NORMAL
#   define SS_NOPRIV  		SS$_NOPRIV
#   define SS_BUFFEROVF		SS$_BUFFEROVF
#else
#   define LIB_INVARG 		0
#   define RMS_DIR    		0
#   define RMS_FAC    		0
#   define RMS_FEX    		0
#   define RMS_FNF    		0
#   define RMS_IFI    		0
#   define RMS_ISI    		0
#   define RMS_PRV    		0
#   define SS_ACCVIO      	0
#   define SS_DEVOFFLINE	0
#   define SS_IVCHAN  		0
#   define SS_NORMAL  		0
#   define SS_NOPRIV  		0
#   define SS_BUFFEROVF		0
#endif

#ifdef WIN32
#   define dSAVEDERRNO  int saved_errno; DWORD saved_win32_errno
#   define dSAVE_ERRNO  int saved_errno = errno; DWORD saved_win32_errno = GetLastError()
#   define SAVE_ERRNO   ( saved_errno = errno, saved_win32_errno = GetLastError() )
#   define RESTORE_ERRNO ( errno = saved_errno, SetLastError(saved_win32_errno) )
#endif

#ifdef OS2
#   define dSAVEDERRNO  int saved_errno; unsigned long saved_os2_errno
#   define dSAVE_ERRNO  int saved_errno = errno; unsigned long saved_os2_errno = Perl_rc
#   define SAVE_ERRNO   ( saved_errno = errno, saved_os2_errno = Perl_rc )
#   define RESTORE_ERRNO ( errno = saved_errno, Perl_rc = saved_os2_errno )
#endif

#ifndef SETERRNO
#   define SETERRNO(errcode,vmserrcode) (errno = (errcode))
#endif

#ifndef dSAVEDERRNO
#   define dSAVEDERRNO    int saved_errno
#   define dSAVE_ERRNO    int saved_errno = errno
#   define SAVE_ERRNO     (saved_errno = errno)
#   define RESTORE_ERRNO  (errno = saved_errno)
#endif

#define ERRSV GvSVn(PL_errgv)

/* contains inlined gv_add_by_type */
#define CLEAR_ERRSV() STMT_START {					\
    SV ** const svp = &GvSV(PL_errgv);					\
    if (!*svp) {							\
        *svp = newSVpvs("");                                            \
    } else if (SvREADONLY(*svp)) {					\
	SvREFCNT_dec_NN(*svp);						\
	*svp = newSVpvs("");						\
    } else {								\
	SV *const errsv = *svp;						\
        SvPVCLEAR(errsv);                                               \
	SvPOK_only(errsv);						\
	if (SvMAGICAL(errsv)) {						\
	    mg_free(errsv);						\
	}								\
    }									\
    } STMT_END


#ifdef PERL_CORE
# define DEFSV (0 + GvSVn(PL_defgv))
# define DEFSV_set(sv) \
    (SvREFCNT_dec(GvSV(PL_defgv)), GvSV(PL_defgv) = SvREFCNT_inc(sv))
# define SAVE_DEFSV                \
    (                               \
	save_gp(PL_defgv, 0),        \
	GvINTRO_off(PL_defgv),        \
	SAVEGENERICSV(GvSV(PL_defgv)), \
	GvSV(PL_defgv) = NULL           \
    )
#else
# define DEFSV GvSVn(PL_defgv)
# define DEFSV_set(sv) (GvSV(PL_defgv) = (sv))
# define SAVE_DEFSV SAVESPTR(GvSV(PL_defgv))
#endif

#ifndef errno
	extern int errno;     /* ANSI allows errno to be an lvalue expr.
			       * For example in multithreaded environments
			       * something like this might happen:
			       * extern int *_errno(void);
			       * #define errno (*_errno()) */
#endif

#define UNKNOWN_ERRNO_MSG "(unknown)"

#if VMS
#define Strerror(e) strerror((e), vaxc$errno)
#else
#define Strerror(e) strerror(e)
#endif

#ifdef I_SYS_IOCTL
#   ifndef _IOCTL_
#	include <sys/ioctl.h>
#   endif
#endif

#if defined(mc300) || defined(mc500) || defined(mc700) || defined(mc6000)
#   ifdef HAS_SOCKETPAIR
#	undef HAS_SOCKETPAIR
#   endif
#   ifdef I_NDBM
#	undef I_NDBM
#   endif
#endif

#ifndef HAS_SOCKETPAIR
#   ifdef HAS_SOCKET
#	define socketpair Perl_my_socketpair
#   endif
#endif

#if INTSIZE == 2
#   define htoni htons
#   define ntohi ntohs
#else
#   define htoni htonl
#   define ntohi ntohl
#endif

/* Configure already sets Direntry_t */
#if defined(I_DIRENT)
#  include <dirent.h>
#elif defined(I_SYS_NDIR)
#  include <sys/ndir.h>
#elif defined(I_SYS_DIR)
#  include <sys/dir.h>
#endif

/*
 * The following gobbledygook brought to you on behalf of __STDC__.
 * (I could just use #ifndef __STDC__, but this is more bulletproof
 * in the face of half-implementations.)
 */

#if defined(I_SYSMODE)
#include <sys/mode.h>
#endif

#ifndef S_IFMT
#   ifdef _S_IFMT
#	define S_IFMT _S_IFMT
#   else
#	define S_IFMT 0170000
#   endif
#endif

#ifndef S_ISDIR
#   define S_ISDIR(m) ((m & S_IFMT) == S_IFDIR)
#endif

#ifndef S_ISCHR
#   define S_ISCHR(m) ((m & S_IFMT) == S_IFCHR)
#endif

#ifndef S_ISBLK
#   ifdef S_IFBLK
#	define S_ISBLK(m) ((m & S_IFMT) == S_IFBLK)
#   else
#	define S_ISBLK(m) (0)
#   endif
#endif

#ifndef S_ISREG
#   define S_ISREG(m) ((m & S_IFMT) == S_IFREG)
#endif

#ifndef S_ISFIFO
#   ifdef S_IFIFO
#	define S_ISFIFO(m) ((m & S_IFMT) == S_IFIFO)
#   else
#	define S_ISFIFO(m) (0)
#   endif
#endif

#ifndef S_ISLNK
#  ifdef _S_ISLNK
#    define S_ISLNK(m) _S_ISLNK(m)
#  elif defined(_S_IFLNK)
#    define S_ISLNK(m) ((m & S_IFMT) == _S_IFLNK)
#  elif defined(S_IFLNK)
#    define S_ISLNK(m) ((m & S_IFMT) == S_IFLNK)
#  else
#    define S_ISLNK(m) (0)
#  endif
#endif

#ifndef S_ISSOCK
#  ifdef _S_ISSOCK
#    define S_ISSOCK(m) _S_ISSOCK(m)
#  elif defined(_S_IFSOCK)
#    define S_ISSOCK(m) ((m & S_IFMT) == _S_IFSOCK)
#  elif defined(S_IFSOCK)
#    define S_ISSOCK(m) ((m & S_IFMT) == S_IFSOCK)
#  else
#    define S_ISSOCK(m) (0)
#  endif
#endif

#ifndef S_IRUSR
#   ifdef S_IREAD
#	define S_IRUSR S_IREAD
#	define S_IWUSR S_IWRITE
#	define S_IXUSR S_IEXEC
#   else
#	define S_IRUSR 0400
#	define S_IWUSR 0200
#	define S_IXUSR 0100
#   endif
#endif

#ifndef S_IRGRP
#   ifdef S_IRUSR
#       define S_IRGRP (S_IRUSR>>3)
#       define S_IWGRP (S_IWUSR>>3)
#       define S_IXGRP (S_IXUSR>>3)
#   else
#       define S_IRGRP 0040
#       define S_IWGRP 0020
#       define S_IXGRP 0010
#   endif
#endif

#ifndef S_IROTH
#   ifdef S_IRUSR
#       define S_IROTH (S_IRUSR>>6)
#       define S_IWOTH (S_IWUSR>>6)
#       define S_IXOTH (S_IXUSR>>6)
#   else
#       define S_IROTH 0040
#       define S_IWOTH 0020
#       define S_IXOTH 0010
#   endif
#endif

#ifndef S_ISUID
#   define S_ISUID 04000
#endif

#ifndef S_ISGID
#   define S_ISGID 02000
#endif

#ifndef S_IRWXU
#   define S_IRWXU (S_IRUSR|S_IWUSR|S_IXUSR)
#endif

#ifndef S_IRWXG
#   define S_IRWXG (S_IRGRP|S_IWGRP|S_IXGRP)
#endif

#ifndef S_IRWXO
#   define S_IRWXO (S_IROTH|S_IWOTH|S_IXOTH)
#endif

/* Haiku R1 seems to define S_IREAD and S_IWRITE in <posix/fcntl.h>
 * which would get included through <sys/file.h >, but that is 3000
 * lines in the future.  --jhi */

#if !defined(S_IREAD) && !defined(__HAIKU__)
#   define S_IREAD S_IRUSR
#endif

#if !defined(S_IWRITE) && !defined(__HAIKU__)
#   define S_IWRITE S_IWUSR
#endif

#ifndef S_IEXEC
#   define S_IEXEC S_IXUSR
#endif

#if defined(cray) || defined(gould) || defined(i860) || defined(pyr)
#   define SLOPPYDIVIDE
#endif

#ifdef UV
#undef UV
#endif

/* This used to be conditionally defined based on whether we had a sprintf()
 * that correctly returns the string length (as required by C89), but we no
 * longer need that. XS modules can (and do) use this name, so it must remain
 * a part of the API that's visible to modules. But we no longer document it
 * either (because using sprintf() rather than snprintf() is almost always
 * a bad idea). */
#define my_sprintf sprintf

/*
 * If we have v?snprintf() and the C99 variadic macros, we can just
 * use just the v?snprintf().  It is nice to try to trap the buffer
 * overflow, however, so if we are DEBUGGING, and we cannot use the
 * gcc statement expressions, then use the function wrappers which try
 * to trap the overflow.  If we can use the gcc statement expressions,
 * we can try that even with the version that uses the C99 variadic
 * macros.
 */

/* Note that we do not check against snprintf()/vsnprintf() returning
 * negative values because that is non-standard behaviour and we use
 * snprintf/vsnprintf only iff HAS_VSNPRINTF has been defined, and
 * that should be true only if the snprintf()/vsnprintf() are true
 * to the standard. */

#define PERL_SNPRINTF_CHECK(len, max, api) STMT_START { if ((max) > 0 && (Size_t)len > (max)) Perl_croak_nocontext("panic: %s buffer overflow", STRINGIFY(api)); } STMT_END

#ifdef USE_QUADMATH
#  define my_snprintf Perl_my_snprintf
#  define PERL_MY_SNPRINTF_GUARDED
#elif defined(HAS_SNPRINTF) && defined(HAS_C99_VARIADIC_MACROS) && !(defined(DEBUGGING) && !defined(PERL_USE_GCC_BRACE_GROUPS)) && !defined(PERL_GCC_PEDANTIC)
#  ifdef PERL_USE_GCC_BRACE_GROUPS
#      define my_snprintf(buffer, max, ...) ({ int len = snprintf(buffer, max, __VA_ARGS__); PERL_SNPRINTF_CHECK(len, max, snprintf); len; })
#      define PERL_MY_SNPRINTF_GUARDED
#  else
#    define my_snprintf(buffer, max, ...) snprintf(buffer, max, __VA_ARGS__)
#  endif
#else
#  define my_snprintf  Perl_my_snprintf
#  define PERL_MY_SNPRINTF_GUARDED
#endif

/* There is no quadmath_vsnprintf, and therefore my_vsnprintf()
 * dies if called under USE_QUADMATH. */
#if defined(HAS_VSNPRINTF) && defined(HAS_C99_VARIADIC_MACROS) && !(defined(DEBUGGING) && !defined(PERL_USE_GCC_BRACE_GROUPS)) && !defined(PERL_GCC_PEDANTIC)
#  ifdef PERL_USE_GCC_BRACE_GROUPS
#      define my_vsnprintf(buffer, max, ...) ({ int len = vsnprintf(buffer, max, __VA_ARGS__); PERL_SNPRINTF_CHECK(len, max, vsnprintf); len; })
#      define PERL_MY_VSNPRINTF_GUARDED
#  else
#    define my_vsnprintf(buffer, max, ...) vsnprintf(buffer, max, __VA_ARGS__)
#  endif
#else
#  define my_vsnprintf Perl_my_vsnprintf
#  define PERL_MY_VSNPRINTF_GUARDED
#endif

/* You will definitely need to use the PERL_MY_SNPRINTF_POST_GUARD()
 * or PERL_MY_VSNPRINTF_POST_GUARD() if you otherwise decide to ignore
 * the result of my_snprintf() or my_vsnprintf().  (No, you should not
 * completely ignore it: otherwise you cannot know whether your output
 * was too long.)
 *
 * int len = my_sprintf(buf, max, ...);
 * PERL_MY_SNPRINTF_POST_GUARD(len, max);
 *
 * The trick is that in certain platforms [a] the my_sprintf() already
 * contains the sanity check, while in certain platforms [b] it needs
 * to be done as a separate step.  The POST_GUARD is that step-- in [a]
 * platforms the POST_GUARD actually does nothing since the check has
 * already been done.  Watch out for the max being the same in both calls.
 *
 * If you actually use the snprintf/vsnprintf return value already,
 * you assumedly are checking its validity somehow.  But you can
 * insert the POST_GUARD() also in that case. */

#ifndef PERL_MY_SNPRINTF_GUARDED
#  define PERL_MY_SNPRINTF_POST_GUARD(len, max) PERL_SNPRINTF_CHECK(len, max, snprintf)
#else
#  define PERL_MY_SNPRINTF_POST_GUARD(len, max) PERL_UNUSED_VAR(len)
#endif

#ifndef  PERL_MY_VSNPRINTF_GUARDED
#  define PERL_MY_VSNPRINTF_POST_GUARD(len, max) PERL_SNPRINTF_CHECK(len, max, vsnprintf)
#else
#  define PERL_MY_VSNPRINTF_POST_GUARD(len, max) PERL_UNUSED_VAR(len)
#endif

#ifdef HAS_STRLCAT
#  define my_strlcat    strlcat
#else
#  define my_strlcat    Perl_my_strlcat
#endif

#if defined(PERL_CORE) || defined(PERL_EXT)
#  ifdef HAS_MEMRCHR
#    define my_memrchr	memrchr
#  else
#    define my_memrchr	S_my_memrchr
#  endif
#endif

#ifdef HAS_STRLCPY
#  define my_strlcpy	strlcpy
#else
#  define my_strlcpy	Perl_my_strlcpy
#endif

#ifdef HAS_STRNLEN
#  define my_strnlen	strnlen
#else
#  define my_strnlen	Perl_my_strnlen
#endif

/*
    The IV type is supposed to be long enough to hold any integral
    value or a pointer.
    --Andy Dougherty	August 1996
*/

typedef IVTYPE IV;
typedef UVTYPE UV;

#if defined(USE_64_BIT_INT) && defined(HAS_QUAD)
#  if QUADKIND == QUAD_IS_INT64_T && defined(INT64_MAX)
#    define IV_MAX INT64_MAX
#    define IV_MIN INT64_MIN
#    define UV_MAX UINT64_MAX
#    ifndef UINT64_MIN
#      define UINT64_MIN 0
#    endif
#    define UV_MIN UINT64_MIN
#  else
#    define IV_MAX PERL_QUAD_MAX
#    define IV_MIN PERL_QUAD_MIN
#    define UV_MAX PERL_UQUAD_MAX
#    define UV_MIN PERL_UQUAD_MIN
#  endif
#  define IV_IS_QUAD
#  define UV_IS_QUAD
#else
#  if defined(INT32_MAX) && IVSIZE == 4
#    define IV_MAX INT32_MAX
#    define IV_MIN INT32_MIN
#    ifndef UINT32_MAX_BROKEN /* e.g. HP-UX with gcc messes this up */
#        define UV_MAX UINT32_MAX
#    else
#        define UV_MAX 4294967295U
#    endif
#    ifndef UINT32_MIN
#      define UINT32_MIN 0
#    endif
#    define UV_MIN UINT32_MIN
#  else
#    define IV_MAX PERL_LONG_MAX
#    define IV_MIN PERL_LONG_MIN
#    define UV_MAX PERL_ULONG_MAX
#    define UV_MIN PERL_ULONG_MIN
#  endif
#  if IVSIZE == 8
#    define IV_IS_QUAD
#    define UV_IS_QUAD
#    ifndef HAS_QUAD
#      define HAS_QUAD
#    endif
#  else
#    undef IV_IS_QUAD
#    undef UV_IS_QUAD
#if !defined(PERL_CORE) || defined(USING_MSVC6)
/* We think that removing this decade-old undef this will cause too much
   breakage on CPAN for too little gain. (See RT #119753)
   However, we do need HAS_QUAD in the core for use by the drand48 code,
   but not for Win32 VC6 because it has poor __int64 support. */
#    undef HAS_QUAD
#endif
#  endif
#endif

#define Size_t_MAX (~(Size_t)0)
#define SSize_t_MAX (SSize_t)(~(Size_t)0 >> 1)

#define IV_DIG (BIT_DIGITS(IVSIZE * 8))
#define UV_DIG (BIT_DIGITS(UVSIZE * 8))

#ifndef NO_PERL_PRESERVE_IVUV
#define PERL_PRESERVE_IVUV	/* We like our integers to stay integers. */
#endif

/*
 *  The macros INT2PTR and NUM2PTR are (despite their names)
 *  bi-directional: they will convert int/float to or from pointers.
 *  However the conversion to int/float are named explicitly:
 *  PTR2IV, PTR2UV, PTR2NV.
 *
 *  For int conversions we do not need two casts if pointers are
 *  the same size as IV and UV.   Otherwise we need an explicit
 *  cast (PTRV) to avoid compiler warnings.
 */
#if (IVSIZE == PTRSIZE) && (UVSIZE == PTRSIZE)
#  define PTRV			UV
#  define INT2PTR(any,d)	(any)(d)
#elif PTRSIZE == LONGSIZE
#  define PTRV			unsigned long
#  define PTR2ul(p)		(unsigned long)(p)
#else
#  define PTRV			unsigned
#endif

#ifndef INT2PTR
#  define INT2PTR(any,d)	(any)(PTRV)(d)
#endif

#ifndef PTR2ul
#  define PTR2ul(p)	INT2PTR(unsigned long,p)	
#endif

#define NUM2PTR(any,d)	(any)(PTRV)(d)
#define PTR2IV(p)	INT2PTR(IV,p)
#define PTR2UV(p)	INT2PTR(UV,p)
#define PTR2NV(p)	NUM2PTR(NV,p)
#define PTR2nat(p)	(PTRV)(p)	/* pointer to integer of PTRSIZE */

/* According to strict ANSI C89 one cannot freely cast between
 * data pointers and function (code) pointers.  There are at least
 * two ways around this.  One (used below) is to do two casts,
 * first the other pointer to an (unsigned) integer, and then
 * the integer to the other pointer.  The other way would be
 * to use unions to "overlay" the pointers.  For an example of
 * the latter technique, see union dirpu in struct xpvio in sv.h.
 * The only feasible use is probably temporarily storing
 * function pointers in a data pointer (such as a void pointer). */

#define DPTR2FPTR(t,p) ((t)PTR2nat(p))	/* data pointer to function pointer */
#define FPTR2DPTR(t,p) ((t)PTR2nat(p))	/* function pointer to data pointer */

#ifdef USE_LONG_DOUBLE
#  if LONG_DOUBLESIZE == DOUBLESIZE
#    define LONG_DOUBLE_EQUALS_DOUBLE
#    undef USE_LONG_DOUBLE /* Ouch! */
#  endif
#endif

/* The following is all to get LDBL_DIG, in order to pick a nice
   default value for printing floating point numbers in Gconvert.
   (see config.h)
*/
#ifndef HAS_LDBL_DIG
#  if LONG_DOUBLESIZE == 10
#    define LDBL_DIG 18 /* assume IEEE */
#  elif LONG_DOUBLESIZE == 12
#    define LDBL_DIG 18 /* gcc? */
#  elif LONG_DOUBLESIZE == 16
#    define LDBL_DIG 33 /* assume IEEE */
#  elif LONG_DOUBLESIZE == DOUBLESIZE
#    define LDBL_DIG DBL_DIG /* bummer */
#  endif
#endif

typedef NVTYPE NV;

#ifdef I_IEEEFP
#   include <ieeefp.h>
#endif

#ifdef USING_MSVC6
/* VC6 has broken NaN semantics: NaN == NaN returns true instead of false,
 * and for example NaN < IV_MIN. */
#  define NAN_COMPARE_BROKEN
#endif
#if defined(__DECC) && defined(__osf__)
/* Also Tru64 cc has broken NaN comparisons. */
#  define NAN_COMPARE_BROKEN
#endif
#if defined(__sgi)
#  define NAN_COMPARE_BROKEN
#endif

#ifdef USE_LONG_DOUBLE
#   ifdef I_SUNMATH
#       include <sunmath.h>
#   endif
#   if defined(LDBL_DIG)
#       define NV_DIG LDBL_DIG
#       ifdef LDBL_MANT_DIG
#           define NV_MANT_DIG LDBL_MANT_DIG
#       endif
#       ifdef LDBL_MIN
#           define NV_MIN LDBL_MIN
#       endif
#       ifdef LDBL_MAX
#           define NV_MAX LDBL_MAX
#       endif
#       ifdef LDBL_MIN_EXP
#           define NV_MIN_EXP LDBL_MIN_EXP
#       endif
#       ifdef LDBL_MAX_EXP
#           define NV_MAX_EXP LDBL_MAX_EXP
#       endif
#       ifdef LDBL_MIN_10_EXP
#           define NV_MIN_10_EXP LDBL_MIN_10_EXP
#       endif
#       ifdef LDBL_MAX_10_EXP
#           define NV_MAX_10_EXP LDBL_MAX_10_EXP
#       endif
#       ifdef LDBL_EPSILON
#           define NV_EPSILON LDBL_EPSILON
#       endif
#       ifdef LDBL_MAX
#           define NV_MAX LDBL_MAX
/* Having LDBL_MAX doesn't necessarily mean that we have LDBL_MIN... -Allen */
#       elif defined(HUGE_VALL)
#           define NV_MAX HUGE_VALL
#       endif
#   endif
#   if defined(HAS_SQRTL)
#       define Perl_acos acosl
#       define Perl_asin asinl
#       define Perl_atan atanl
#       define Perl_atan2 atan2l
#       define Perl_ceil ceill
#       define Perl_cos cosl
#       define Perl_cosh coshl
#       define Perl_exp expl
/* no Perl_fabs, but there's PERL_ABS */
#       define Perl_floor floorl
#       define Perl_fmod fmodl
#       define Perl_log logl
#       define Perl_log10 log10l
#       define Perl_pow powl
#       define Perl_sin sinl
#       define Perl_sinh sinhl
#       define Perl_sqrt sqrtl
#       define Perl_tan tanl
#       define Perl_tanh tanhl
#   endif
/* e.g. libsunmath doesn't have modfl and frexpl as of mid-March 2000 */
#   ifndef Perl_modf
#       ifdef HAS_MODFL
#           define Perl_modf(x,y) modfl(x,y)
/* eg glibc 2.2 series seems to provide modfl on ppc and arm, but has no
   prototype in <math.h> */
#           ifndef HAS_MODFL_PROTO
EXTERN_C long double modfl(long double, long double *);
#	    endif
#       elif (defined(HAS_TRUNCL) || defined(HAS_AINTL)) && defined(HAS_COPYSIGNL)
        extern long double Perl_my_modfl(long double x, long double *ip);
#           define Perl_modf(x,y) Perl_my_modfl(x,y)
#       endif
#   endif
#   ifndef Perl_frexp
#       ifdef HAS_FREXPL
#           define Perl_frexp(x,y) frexpl(x,y)
#       elif defined(HAS_ILOGBL) && defined(HAS_SCALBNL)
extern long double Perl_my_frexpl(long double x, int *e);
#           define Perl_frexp(x,y) Perl_my_frexpl(x,y)
#       endif
#   endif
#   ifndef Perl_ldexp
#       ifdef HAS_LDEXPL
#           define Perl_ldexp(x, y) ldexpl(x,y)
#       elif defined(HAS_SCALBNL) && FLT_RADIX == 2
#           define Perl_ldexp(x,y) scalbnl(x,y)
#       endif
#   endif
#   ifndef Perl_isnan
#       if defined(HAS_ISNANL) && !(defined(isnan) && defined(HAS_C99))
#           define Perl_isnan(x) isnanl(x)
#       elif defined(__sgi) && defined(__c99)  /* XXX Configure test needed */
#           define Perl_isnan(x) isnan(x)
#       endif
#   endif
#   ifndef Perl_isinf
#       if defined(HAS_ISINFL) && !(defined(isinf) && defined(HAS_C99))
#           define Perl_isinf(x) isinfl(x)
#       elif defined(__sgi) && defined(__c99)  /* XXX Configure test needed */
#           define Perl_isinf(x) isinf(x)
#       elif defined(LDBL_MAX) && !defined(NAN_COMPARE_BROKEN)
#           define Perl_isinf(x) ((x) > LDBL_MAX || (x) < -LDBL_MAX)
#       endif
#   endif
#   ifndef Perl_isfinite
#       define Perl_isfinite(x) Perl_isfinitel(x)
#   endif
#elif defined(USE_QUADMATH) && defined(I_QUADMATH)
#   include <quadmath.h>
#   define NV_DIG FLT128_DIG
#   define NV_MANT_DIG FLT128_MANT_DIG
#   define NV_MIN FLT128_MIN
#   define NV_MAX FLT128_MAX
#   define NV_MIN_EXP FLT128_MIN_EXP
#   define NV_MAX_EXP FLT128_MAX_EXP
#   define NV_EPSILON FLT128_EPSILON
#   define NV_MIN_10_EXP FLT128_MIN_10_EXP
#   define NV_MAX_10_EXP FLT128_MAX_10_EXP
#   define Perl_acos acosq
#   define Perl_asin asinq
#   define Perl_atan atanq
#   define Perl_atan2 atan2q
#   define Perl_ceil ceilq
#   define Perl_cos cosq
#   define Perl_cosh coshq
#   define Perl_exp expq
/* no Perl_fabs, but there's PERL_ABS */
#   define Perl_floor floorq
#   define Perl_fmod fmodq
#   define Perl_log logq
#   define Perl_log10 log10q
#   define Perl_signbit signbitq
#   define Perl_pow powq
#   define Perl_sin sinq
#   define Perl_sinh sinhq
#   define Perl_sqrt sqrtq
#   define Perl_tan tanq
#   define Perl_tanh tanhq
#   define Perl_modf(x,y) modfq(x,y)
#   define Perl_frexp(x,y) frexpq(x,y)
#   define Perl_ldexp(x, y) ldexpq(x,y)
#   define Perl_isinf(x) isinfq(x)
#   define Perl_isnan(x) isnanq(x)
#   define Perl_isfinite(x) !(isnanq(x) || isinfq(x))
#   define Perl_fp_class(x) ((x) == 0.0Q ? 0 : isinfq(x) ? 3 : isnanq(x) ? 4 : PERL_ABS(x) < FLT128_MIN ? 2 : 1)
#   define Perl_fp_class_inf(x)    (Perl_fp_class(x) == 3)
#   define Perl_fp_class_nan(x)    (Perl_fp_class(x) == 4)
#   define Perl_fp_class_norm(x)   (Perl_fp_class(x) == 1)
#   define Perl_fp_class_denorm(x) (Perl_fp_class(x) == 2)
#   define Perl_fp_class_zero(x)   (Perl_fp_class(x) == 0)
#else
#   define NV_DIG DBL_DIG
#   define NV_MANT_DIG DBL_MANT_DIG
#   define NV_MIN DBL_MIN
#   define NV_MAX DBL_MAX
#   define NV_MIN_EXP DBL_MIN_EXP
#   define NV_MAX_EXP DBL_MAX_EXP
#   define NV_MIN_10_EXP DBL_MIN_10_EXP
#   define NV_MAX_10_EXP DBL_MAX_10_EXP
#   define NV_EPSILON DBL_EPSILON
#   define NV_MAX DBL_MAX
#   define NV_MIN DBL_MIN

/* These math interfaces are C89. */
#   define Perl_acos acos
#   define Perl_asin asin
#   define Perl_atan atan
#   define Perl_atan2 atan2
#   define Perl_ceil ceil
#   define Perl_cos cos
#   define Perl_cosh cosh
#   define Perl_exp exp
/* no Perl_fabs, but there's PERL_ABS */
#   define Perl_floor floor
#   define Perl_fmod fmod
#   define Perl_log log
#   define Perl_log10 log10
#   define Perl_pow pow
#   define Perl_sin sin
#   define Perl_sinh sinh
#   define Perl_sqrt sqrt
#   define Perl_tan tan
#   define Perl_tanh tanh

#   define Perl_modf(x,y) modf(x,y)
#   define Perl_frexp(x,y) frexp(x,y)
#   define Perl_ldexp(x,y) ldexp(x,y)

#   ifndef Perl_isnan
#       ifdef HAS_ISNAN
#           define Perl_isnan(x) isnan(x)
#       endif
#   endif
#   ifndef Perl_isinf
#       if defined(HAS_ISINF)
#           define Perl_isinf(x) isinf(x)
#       elif defined(DBL_MAX) && !defined(NAN_COMPARE_BROKEN)
#           define Perl_isinf(x) ((x) > DBL_MAX || (x) < -DBL_MAX)
#       endif
#   endif
#   ifndef Perl_isfinite
#     ifdef HAS_ISFINITE
#       define Perl_isfinite(x) isfinite(x)
#     elif defined(HAS_FINITE)
#       define Perl_isfinite(x) finite(x)
#     endif
#   endif
#endif

/* fpclassify(): C99.  It is supposed to be a macro that switches on
* the sizeof() of its argument, so there's no need for e.g. fpclassifyl().*/
#if !defined(Perl_fp_class) && defined(HAS_FPCLASSIFY)
#    include <math.h>
#    if defined(FP_INFINITE) && defined(FP_NAN)
#        define Perl_fp_class(x)	fpclassify(x)
#        define Perl_fp_class_inf(x)	(Perl_fp_class(x)==FP_INFINITE)
#        define Perl_fp_class_nan(x)	(Perl_fp_class(x)==FP_NAN)
#        define Perl_fp_class_norm(x)	(Perl_fp_class(x)==FP_NORMAL)
#        define Perl_fp_class_denorm(x)	(Perl_fp_class(x)==FP_SUBNORMAL)
#        define Perl_fp_class_zero(x)	(Perl_fp_class(x)==FP_ZERO)
#    elif defined(FP_PLUS_INF) && defined(FP_QNAN)
/* Some versions of HP-UX (10.20) have (only) fpclassify() but which is
 * actually not the C99 fpclassify, with its own set of return defines. */
#        define Perl_fp_class(x)	fpclassify(x)
#        define Perl_fp_class_pinf(x)	(Perl_fp_class(x)==FP_PLUS_INF)
#        define Perl_fp_class_ninf(x)	(Perl_fp_class(x)==FP_MINUS_INF)
#        define Perl_fp_class_snan(x)	(Perl_fp_class(x)==FP_SNAN)
#        define Perl_fp_class_qnan(x)	(Perl_fp_class(x)==FP_QNAN)
#        define Perl_fp_class_pnorm(x)	(Perl_fp_class(x)==FP_PLUS_NORM)
#        define Perl_fp_class_nnorm(x)	(Perl_fp_class(x)==FP_MINUS_NORM)
#        define Perl_fp_class_pdenorm(x)	(Perl_fp_class(x)==FP_PLUS_DENORM)
#        define Perl_fp_class_ndenorm(x)	(Perl_fp_class(x)==FP_MINUS_DENORM)
#        define Perl_fp_class_pzero(x)	(Perl_fp_class(x)==FP_PLUS_ZERO)
#        define Perl_fp_class_nzero(x)	(Perl_fp_class(x)==FP_MINUS_ZERO)
#    else
#        undef Perl_fp_class /* Unknown set of defines */
#    endif
#endif

/* fp_classify(): Legacy: VMS, maybe Unicos? The values, however,
 * are identical to the C99 fpclassify(). */
#if !defined(Perl_fp_class) && defined(HAS_FP_CLASSIFY)
#    include <math.h>
#    ifdef __VMS
     /* FP_INFINITE and others are here rather than in math.h as C99 stipulates */
#        include <fp.h>
     /* oh, and the isnormal macro has a typo in it! */
#    undef isnormal
#    define isnormal(x) Perl_fp_class_norm(x)
#    endif
#    if defined(FP_INFINITE) && defined(FP_NAN)
#        define Perl_fp_class(x)	fp_classify(x)
#        define Perl_fp_class_inf(x)	(Perl_fp_class(x)==FP_INFINITE)
#        define Perl_fp_class_nan(x)	(Perl_fp_class(x)==FP_NAN)
#        define Perl_fp_class_norm(x)	(Perl_fp_class(x)==FP_NORMAL)
#        define Perl_fp_class_denorm(x)	(Perl_fp_class(x)==FP_SUBNORMAL)
#        define Perl_fp_class_zero(x)	(Perl_fp_class(x)==FP_ZERO)
#    else
#        undef Perl_fp_class /* Unknown set of defines */
#    endif
#endif

/* Feel free to check with me for the SGI manpages, SGI testing,
 * etcetera, if you want to try getting this to work with IRIX.
 *
 * - Allen <allens@cpan.org> */

/* fpclass(): SysV, at least Solaris and some versions of IRIX. */
#if !defined(Perl_fp_class) && (defined(HAS_FPCLASS)||defined(HAS_FPCLASSL))
/* Solaris and IRIX have fpclass/fpclassl, but they are using
 * an enum typedef, not cpp symbols, and Configure doesn't detect that.
 * Define some symbols also as cpp symbols so we can detect them. */
#    if defined(__sun) || defined(__sgi) /* XXX Configure test instead */
#     define FP_PINF FP_PINF
#     define FP_QNAN FP_QNAN
#    endif
#    include <math.h>
#    ifdef I_IEEFP
#        include <ieeefp.h>
#    endif
#    ifdef I_FP
#        include <fp.h>
#    endif
#    if defined(USE_LONG_DOUBLE) && defined(HAS_FPCLASSL)
#        define Perl_fp_class(x)	fpclassl(x)
#    else
#        define Perl_fp_class(x)	fpclass(x)
#    endif
#    if defined(FP_CLASS_PINF) && defined(FP_CLASS_SNAN)
#        define Perl_fp_class_snan(x)	(Perl_fp_class(x)==FP_CLASS_SNAN)
#        define Perl_fp_class_qnan(x)	(Perl_fp_class(x)==FP_CLASS_QNAN)
#        define Perl_fp_class_ninf(x)	(Perl_fp_class(x)==FP_CLASS_NINF)
#        define Perl_fp_class_pinf(x)	(Perl_fp_class(x)==FP_CLASS_PINF)
#        define Perl_fp_class_nnorm(x)	(Perl_fp_class(x)==FP_CLASS_NNORM)
#        define Perl_fp_class_pnorm(x)	(Perl_fp_class(x)==FP_CLASS_PNORM)
#        define Perl_fp_class_ndenorm(x)	(Perl_fp_class(x)==FP_CLASS_NDENORM)
#        define Perl_fp_class_pdenorm(x)	(Perl_fp_class(x)==FP_CLASS_PDENORM)
#        define Perl_fp_class_nzero(x)	(Perl_fp_class(x)==FP_CLASS_NZERO)
#        define Perl_fp_class_pzero(x)	(Perl_fp_class(x)==FP_CLASS_PZERO)
#    elif defined(FP_PINF) && defined(FP_QNAN)
#        define Perl_fp_class_snan(x)	(Perl_fp_class(x)==FP_SNAN)
#        define Perl_fp_class_qnan(x)	(Perl_fp_class(x)==FP_QNAN)
#        define Perl_fp_class_ninf(x)	(Perl_fp_class(x)==FP_NINF)
#        define Perl_fp_class_pinf(x)	(Perl_fp_class(x)==FP_PINF)
#        define Perl_fp_class_nnorm(x)	(Perl_fp_class(x)==FP_NNORM)
#        define Perl_fp_class_pnorm(x)	(Perl_fp_class(x)==FP_PNORM)
#        define Perl_fp_class_ndenorm(x)	(Perl_fp_class(x)==FP_NDENORM)
#        define Perl_fp_class_pdenorm(x)	(Perl_fp_class(x)==FP_PDENORM)
#        define Perl_fp_class_nzero(x)	(Perl_fp_class(x)==FP_NZERO)
#        define Perl_fp_class_pzero(x)	(Perl_fp_class(x)==FP_PZERO)
#    else
#        undef Perl_fp_class /* Unknown set of defines */
#    endif
#endif

/* fp_class(): Legacy: at least Tru64, some versions of IRIX. */
#if !defined(Perl_fp_class) && (defined(HAS_FP_CLASS)||defined(HAS_FP_CLASSL))
#    include <math.h>
#    if !defined(FP_SNAN) && defined(I_FP_CLASS)
#        include <fp_class.h>
#    endif
#    if defined(FP_POS_INF) && defined(FP_QNAN)
#        ifdef __sgi /* XXX Configure test instead */
#            ifdef USE_LONG_DOUBLE
#                define Perl_fp_class(x)	fp_class_l(x)
#            else
#                define Perl_fp_class(x)	fp_class_d(x)
#            endif
#        else
#            if defined(USE_LONG_DOUBLE) && defined(HAS_FP_CLASSL)
#                define Perl_fp_class(x)	fp_classl(x)
#            else
#                define Perl_fp_class(x)	fp_class(x)
#            endif
#        endif
#        if defined(FP_POS_INF) && defined(FP_QNAN)
#            define Perl_fp_class_snan(x)	(Perl_fp_class(x)==FP_SNAN)
#            define Perl_fp_class_qnan(x)	(Perl_fp_class(x)==FP_QNAN)
#            define Perl_fp_class_ninf(x)	(Perl_fp_class(x)==FP_NEG_INF)
#            define Perl_fp_class_pinf(x)	(Perl_fp_class(x)==FP_POS_INF)
#            define Perl_fp_class_nnorm(x)	(Perl_fp_class(x)==FP_NEG_NORM)
#            define Perl_fp_class_pnorm(x)	(Perl_fp_class(x)==FP_POS_NORM)
#            define Perl_fp_class_ndenorm(x)	(Perl_fp_class(x)==FP_NEG_DENORM)
#            define Perl_fp_class_pdenorm(x)	(Perl_fp_class(x)==FP_POS_DENORM)
#            define Perl_fp_class_nzero(x)	(Perl_fp_class(x)==FP_NEG_ZERO)
#            define Perl_fp_class_pzero(x)	(Perl_fp_class(x)==FP_POS_ZERO)
#        else
#            undef Perl_fp_class /* Unknown set of defines */
#        endif
#    endif
#endif

/* class(), _class(): Legacy: AIX. */
#if !defined(Perl_fp_class) && defined(HAS_CLASS)
#    include <math.h>
#    if defined(FP_PLUS_NORM) && defined(FP_PLUS_INF)
#        ifndef _cplusplus
#            define Perl_fp_class(x)	class(x)
#        else
#            define Perl_fp_class(x)	_class(x)
#        endif
#        if defined(FP_PLUS_INF) && defined(FP_NANQ)
#            define Perl_fp_class_snan(x)	(Perl_fp_class(x)==FP_NANS)
#            define Perl_fp_class_qnan(x)	(Perl_fp_class(x)==FP_NANQ)
#            define Perl_fp_class_ninf(x)	(Perl_fp_class(x)==FP_MINUS_INF)
#            define Perl_fp_class_pinf(x)	(Perl_fp_class(x)==FP_PLUS_INF)
#            define Perl_fp_class_nnorm(x)	(Perl_fp_class(x)==FP_MINUS_NORM)
#            define Perl_fp_class_pnorm(x)	(Perl_fp_class(x)==FP_PLUS_NORM)
#            define Perl_fp_class_ndenorm(x)	(Perl_fp_class(x)==FP_MINUS_DENORM)
#            define Perl_fp_class_pdenorm(x)	(Perl_fp_class(x)==FP_PLUS_DENORM)
#            define Perl_fp_class_nzero(x)	(Perl_fp_class(x)==FP_MINUS_ZERO)
#            define Perl_fp_class_pzero(x)	(Perl_fp_class(x)==FP_PLUS_ZERO)
#        else
#            undef Perl_fp_class /* Unknown set of defines */
#        endif
#    endif
#endif

/* Win32: _fpclass(), _isnan(), _finite(). */
#ifdef WIN32
#  ifndef Perl_isnan
#    define Perl_isnan(x) _isnan(x)
#  endif
#  ifndef Perl_isfinite
#    define Perl_isfinite(x) _finite(x)
#  endif
#  ifndef Perl_fp_class_snan
/* No simple way to #define Perl_fp_class because _fpclass()
 * returns a set of bits. */
#    define Perl_fp_class_snan(x) (_fpclass(x) & _FPCLASS_SNAN)
#    define Perl_fp_class_qnan(x) (_fpclass(x) & _FPCLASS_QNAN)
#    define Perl_fp_class_nan(x) (_fpclass(x) & (_FPCLASS_SNAN|_FPCLASS_QNAN))
#    define Perl_fp_class_ninf(x) (_fpclass(x) & _FPCLASS_NINF))
#    define Perl_fp_class_pinf(x) (_fpclass(x) & _FPCLASS_PINF))
#    define Perl_fp_class_inf(x) (_fpclass(x) & (_FPCLASS_NINF|_FPCLASS_PINF))
#    define Perl_fp_class_nnorm(x) (_fpclass(x) & _FPCLASS_NN)
#    define Perl_fp_class_pnorm(x) (_fpclass(x) & _FPCLASS_PN)
#    define Perl_fp_class_norm(x) (_fpclass(x) & (_FPCLASS_NN|_FPCLASS_PN))
#    define Perl_fp_class_ndenorm(x) (_fpclass(x) & _FPCLASS_ND)
#    define Perl_fp_class_pdenorm(x) (_fpclass(x) & _FPCLASS_PD)
#    define Perl_fp_class_denorm(x) (_fpclass(x) & (_FPCLASS_ND|_FPCLASS_PD))
#    define Perl_fp_class_nzero(x) (_fpclass(x) & _FPCLASS_NZ)
#    define Perl_fp_class_pzero(x) (_fpclass(x) & _FPCLASS_PZ)
#    define Perl_fp_class_zero(x) (_fpclass(x) & (_FPCLASS_NZ|_FPCLASS_PZ))
#  endif
#endif

#if !defined(Perl_fp_class_inf) && \
  defined(Perl_fp_class_pinf) && defined(Perl_fp_class_ninf)
#  define Perl_fp_class_inf(x) \
    (Perl_fp_class_pinf(x) || Perl_fp_class_ninf(x))
#endif

#if !defined(Perl_fp_class_nan) && \
  defined(Perl_fp_class_snan) && defined(Perl_fp_class_qnan)
#  define Perl_fp_class_nan(x) \
    (Perl_fp_class_snan(x) || Perl_fp_class_qnan(x))
#endif

#if !defined(Perl_fp_class_zero) && \
  defined(Perl_fp_class_pzero) && defined(Perl_fp_class_nzero)
#  define Perl_fp_class_zero(x) \
    (Perl_fp_class_pzero(x) || Perl_fp_class_nzero(x))
#endif

#if !defined(Perl_fp_class_norm) && \
  defined(Perl_fp_class_pnorm) && defined(Perl_fp_class_nnorm)
#  define Perl_fp_class_norm(x) \
    (Perl_fp_class_pnorm(x) || Perl_fp_class_nnorm(x))
#endif

#if !defined(Perl_fp_class_denorm) && \
  defined(Perl_fp_class_pdenorm) && defined(Perl_fp_class_ndenorm)
#  define Perl_fp_class_denorm(x) \
    (Perl_fp_class_pdenorm(x) || Perl_fp_class_ndenorm(x))
#endif

#ifdef UNDER_CE
int isnan(double d);
#endif

#ifndef Perl_isnan
#   ifdef Perl_fp_class_nan
#       define Perl_isnan(x) Perl_fp_class_nan(x)
#   elif defined(HAS_UNORDERED)
#       define Perl_isnan(x) unordered((x), 0.0)
#   else
#       define Perl_isnan(x) ((x)!=(x))
#   endif
#endif

#ifndef Perl_isinf
#   ifdef Perl_fp_class_inf
#       define Perl_isinf(x) Perl_fp_class_inf(x)
#   endif
#endif

#ifndef Perl_isfinite
#   if defined(HAS_ISFINITE) && !defined(isfinite)
#     define Perl_isfinite(x) isfinite((double)(x))
#   elif defined(HAS_FINITE)
#       define Perl_isfinite(x) finite((double)(x))
#   elif defined(Perl_fp_class_finite)
#     define Perl_isfinite(x) Perl_fp_class_finite(x)
#   else
/* For the infinities the multiplication returns nan,
 * for the nan the multiplication also returns nan,
 * for everything else (that is, finite) zero should be returned. */
#     define Perl_isfinite(x) (((x) * 0) == 0)
#   endif
#endif

#ifndef Perl_isinf
#   if defined(Perl_isfinite) && defined(Perl_isnan)
#       define Perl_isinf(x) !(Perl_isfinite(x)||Perl_isnan(x))
#   endif
#endif

/* We need Perl_isfinitel (ends with ell) (if available) even when
 * not USE_LONG_DOUBLE because the printf code (sv_catpvfn_flags)
 * needs that. */
#if defined(HAS_LONG_DOUBLE) && !defined(Perl_isfinitel)
/* If isfinite() is a macro and looks like we have C99,
 * we assume it's the type-aware C99 isfinite(). */
#    if defined(HAS_ISFINITE) && defined(isfinite) && defined(HAS_C99)
#        define Perl_isfinitel(x) isfinite(x)
#    elif defined(HAS_ISFINITEL)
#        define Perl_isfinitel(x) isfinitel(x)
#    elif defined(HAS_FINITEL)
#        define Perl_isfinitel(x) finitel(x)
#    elif defined(HAS_INFL) && defined(HAS_NANL)
#        define Perl_isfinitel(x) !(isinfl(x)||isnanl(x))
#    else
#        define Perl_isfinitel(x) ((x) * 0 == 0)  /* See Perl_isfinite. */
#    endif
#endif

/* The default is to use Perl's own atof() implementation (in numeric.c).
 * Usually that is the one to use but for some platforms (e.g. UNICOS)
 * it is however best to use the native implementation of atof.
 * You can experiment with using your native one by -DUSE_PERL_ATOF=0.
 * Some good tests to try out with either setting are t/base/num.t,
 * t/op/numconvert.t, and t/op/pack.t. Note that if using long doubles
 * you may need to be using a different function than atof! */

#ifndef USE_PERL_ATOF
#   ifndef _UNICOS
#       define USE_PERL_ATOF
#   endif
#else
#   if USE_PERL_ATOF == 0
#       undef USE_PERL_ATOF
#   endif
#endif

#ifdef USE_PERL_ATOF
#   define Perl_atof(s) Perl_my_atof(s)
#   define Perl_atof2(s, n) Perl_my_atof3(aTHX_ (s), &(n), 0)
#else
#   define Perl_atof(s) (NV)atof(s)
#   define Perl_atof2(s, n) ((n) = atof(s))
#endif
#define my_atof2(a,b) my_atof3(a,b,0)

/*
 * CHAR_MIN and CHAR_MAX are not included here, as the (char) type may be
 * ambiguous. It may be equivalent to (signed char) or (unsigned char)
 * depending on local options. Until Configure detects this (or at least
 * detects whether the "signed" keyword is available) the CHAR ranges
 * will not be included. UCHAR functions normally.
 *                                                           - kja
 */

#define PERL_UCHAR_MIN ((unsigned char)0)
#define PERL_UCHAR_MAX ((unsigned char)UCHAR_MAX)

#define PERL_USHORT_MIN ((unsigned short)0)
#define PERL_USHORT_MAX ((unsigned short)USHRT_MAX)

#define PERL_SHORT_MAX ((short)SHRT_MAX)
#define PERL_SHORT_MIN ((short)SHRT_MIN)

#define PERL_UINT_MAX ((unsigned int)UINT_MAX)
#define PERL_UINT_MIN ((unsigned int)0)

#define PERL_INT_MAX ((int)INT_MAX)
#define PERL_INT_MIN ((int)INT_MIN)

#define PERL_ULONG_MAX ((unsigned long)ULONG_MAX)
#define PERL_ULONG_MIN ((unsigned long)0L)

#define PERL_LONG_MAX ((long)LONG_MAX)
#define PERL_LONG_MIN ((long)LONG_MIN)

#ifdef UV_IS_QUAD
#    define PERL_UQUAD_MAX	(~(UV)0)
#    define PERL_UQUAD_MIN	((UV)0)
#    define PERL_QUAD_MAX 	((IV) (PERL_UQUAD_MAX >> 1))
#    define PERL_QUAD_MIN 	(-PERL_QUAD_MAX - ((3 & -1) == 3))
#endif

typedef MEM_SIZE STRLEN;

typedef struct op OP;
typedef struct cop COP;
typedef struct unop UNOP;
typedef struct unop_aux UNOP_AUX;
typedef struct binop BINOP;
typedef struct listop LISTOP;
typedef struct logop LOGOP;
typedef struct pmop PMOP;
typedef struct svop SVOP;
typedef struct padop PADOP;
typedef struct pvop PVOP;
typedef struct loop LOOP;
typedef struct methop METHOP;

#ifdef PERL_CORE
typedef struct opslab OPSLAB;
typedef struct opslot OPSLOT;
#endif

typedef struct block_hooks BHK;
typedef struct custom_op XOP;

typedef struct interpreter PerlInterpreter;

/* SGI's <sys/sema.h> has struct sv */
#if defined(__sgi)
#   define STRUCT_SV perl_sv
#else
#   define STRUCT_SV sv
#endif
typedef struct STRUCT_SV SV;
typedef struct av AV;
typedef struct hv HV;
typedef struct cv CV;
typedef struct p5rx REGEXP;
typedef struct gp GP;
typedef struct gv GV;
typedef struct io IO;
typedef struct context PERL_CONTEXT;
typedef struct block BLOCK;

typedef struct magic MAGIC;
typedef struct xpv XPV;
typedef struct xpviv XPVIV;
typedef struct xpvuv XPVUV;
typedef struct xpvnv XPVNV;
typedef struct xpvmg XPVMG;
typedef struct xpvlv XPVLV;
typedef struct xpvinvlist XINVLIST;
typedef struct xpvav XPVAV;
typedef struct xpvhv XPVHV;
typedef struct xpvgv XPVGV;
typedef struct xpvcv XPVCV;
typedef struct xpvbm XPVBM;
typedef struct xpvfm XPVFM;
typedef struct xpvio XPVIO;
typedef struct mgvtbl MGVTBL;
typedef union any ANY;
typedef struct ptr_tbl_ent PTR_TBL_ENT_t;
typedef struct ptr_tbl PTR_TBL_t;
typedef struct clone_params CLONE_PARAMS;

/* a pad is currently just an AV; but that might change,
 * so hide the type.  */
typedef struct padlist PADLIST;
typedef AV PAD;
typedef struct padnamelist PADNAMELIST;
typedef struct padname PADNAME;

/* always enable PERL_OP_PARENT  */
#if !defined(PERL_OP_PARENT)
#  define PERL_OP_PARENT
#endif

/* enable PERL_COPY_ON_WRITE by default */
#if !defined(PERL_COPY_ON_WRITE) && !defined(PERL_NO_COW)
#  define PERL_COPY_ON_WRITE
#endif

#ifdef PERL_COPY_ON_WRITE
#  define PERL_ANY_COW
#else
# define PERL_SAWAMPERSAND
#endif

#if defined(PERL_DEBUG_READONLY_OPS) && !defined(USE_ITHREADS)
# error PERL_DEBUG_READONLY_OPS only works with ithreads
#endif

#include "handy.h"
#include "charclass_invlists.h"

#if defined(USE_LARGE_FILES) && !defined(NO_64_BIT_RAWIO)
#   if LSEEKSIZE == 8 && !defined(USE_64_BIT_RAWIO)
#       define USE_64_BIT_RAWIO	/* implicit */
#   endif
#endif

/* Notice the use of HAS_FSEEKO: now we are obligated to always use
 * fseeko/ftello if possible.  Don't go #defining ftell to ftello yourself,
 * however, because operating systems like to do that themself. */
#ifndef FSEEKSIZE
#   ifdef HAS_FSEEKO
#       define FSEEKSIZE LSEEKSIZE
#   else
#       define FSEEKSIZE LONGSIZE
#   endif
#endif

#if defined(USE_LARGE_FILES) && !defined(NO_64_BIT_STDIO)
#   if FSEEKSIZE == 8 && !defined(USE_64_BIT_STDIO)
#       define USE_64_BIT_STDIO /* implicit */
#   endif
#endif

#ifdef USE_64_BIT_RAWIO
#   ifdef HAS_OFF64_T
#       undef Off_t
#       define Off_t off64_t
#       undef LSEEKSIZE
#       define LSEEKSIZE 8
#   endif
/* Most 64-bit environments have defines like _LARGEFILE_SOURCE that
 * will trigger defines like the ones below.  Some 64-bit environments,
 * however, do not.  Therefore we have to explicitly mix and match. */
#   if defined(USE_OPEN64)
#       define open open64
#   endif
#   if defined(USE_LSEEK64)
#       define lseek lseek64
#   else
#       if defined(USE_LLSEEK)
#           define lseek llseek
#       endif
#   endif
#   if defined(USE_STAT64)
#       define stat stat64
#   endif
#   if defined(USE_FSTAT64)
#       define fstat fstat64
#   endif
#   if defined(USE_LSTAT64)
#       define lstat lstat64
#   endif
#   if defined(USE_FLOCK64)
#       define flock flock64
#   endif
#   if defined(USE_LOCKF64)
#       define lockf lockf64
#   endif
#   if defined(USE_FCNTL64)
#       define fcntl fcntl64
#   endif
#   if defined(USE_TRUNCATE64)
#       define truncate truncate64
#   endif
#   if defined(USE_FTRUNCATE64)
#       define ftruncate ftruncate64
#   endif
#endif

#ifdef USE_64_BIT_STDIO
#   ifdef HAS_FPOS64_T
#       undef Fpos_t
#       define Fpos_t fpos64_t
#   endif
/* Most 64-bit environments have defines like _LARGEFILE_SOURCE that
 * will trigger defines like the ones below.  Some 64-bit environments,
 * however, do not. */
#   if defined(USE_FOPEN64)
#       define fopen fopen64
#   endif
#   if defined(USE_FSEEK64)
#       define fseek fseek64 /* don't do fseeko here, see perlio.c */
#   endif
#   if defined(USE_FTELL64)
#       define ftell ftell64 /* don't do ftello here, see perlio.c */
#   endif
#   if defined(USE_FSETPOS64)
#       define fsetpos fsetpos64
#   endif
#   if defined(USE_FGETPOS64)
#       define fgetpos fgetpos64
#   endif
#   if defined(USE_TMPFILE64)
#       define tmpfile tmpfile64
#   endif
#   if defined(USE_FREOPEN64)
#       define freopen freopen64
#   endif
#endif

#if defined(OS2)
#  include "iperlsys.h"
#endif

#ifdef DOSISH
#   if defined(OS2)
#       include "os2ish.h"
#   else
#       include "dosish.h"
#   endif
#elif defined(VMS)
#   include "vmsish.h"
#elif defined(PLAN9)
#   include "./plan9/plan9ish.h"
#elif defined(__VOS__)
#   ifdef __GNUC__
#     include "./vos/vosish.h"
#   else
#     include "vos/vosish.h"
#   endif
#elif defined(__SYMBIAN32__)
#   include "symbian/symbianish.h"
#elif defined(__HAIKU__)
#   include "haiku/haikuish.h"
#else
#   include "unixish.h"
#endif

#ifdef __amigaos4__
#    include "amigaos.h"
#    undef FD_CLOEXEC /* a lie in AmigaOS */
#endif

/* NSIG logic from Configure --> */
#ifndef NSIG
#  ifdef _NSIG
#    define NSIG (_NSIG)
#  elif defined(SIGMAX)
#    define NSIG (SIGMAX+1)
#  elif defined(SIG_MAX)
#    define NSIG (SIG_MAX+1)
#  elif defined(_SIG_MAX)
#    define NSIG (_SIG_MAX+1)
#  elif defined(MAXSIG)
#    define NSIG (MAXSIG+1)
#  elif defined(MAX_SIG)
#    define NSIG (MAX_SIG+1)
#  elif defined(SIGARRAYSIZE)
#    define NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
#  elif defined(_sys_nsig)
#    define NSIG (_sys_nsig) /* Solaris 2.5 */
#  else
     /* Default to some arbitrary number that's big enough to get most
      * of the common signals.  */
#    define NSIG 50
#  endif
#endif
/* <-- NSIG logic from Configure */

#ifndef NO_ENVIRON_ARRAY
#  define USE_ENVIRON_ARRAY
#endif

/*
 * initialise to avoid floating-point exceptions from overflow, etc
 */
#ifndef PERL_FPU_INIT
#  ifdef HAS_FPSETMASK
#    if HAS_FLOATINGPOINT_H
#      include <floatingpoint.h>
#    endif
/* Some operating systems have this as a macro, which in turn expands to a comma
   expression, and the last sub-expression is something that gets calculated,
   and then they have the gall to warn that a value computed is not used. Hence
   cast to void.  */
#    define PERL_FPU_INIT (void)fpsetmask(0)
#  elif defined(SIGFPE) && defined(SIG_IGN) && !defined(PERL_MICRO)
#    define PERL_FPU_INIT       PL_sigfpe_saved = (Sighandler_t) signal(SIGFPE, SIG_IGN)
#    define PERL_FPU_PRE_EXEC   { Sigsave_t xfpe; rsignal_save(SIGFPE, PL_sigfpe_saved, &xfpe);
#    define PERL_FPU_POST_EXEC    rsignal_restore(SIGFPE, &xfpe); }
#  else
#    define PERL_FPU_INIT
#  endif
#endif
#ifndef PERL_FPU_PRE_EXEC
#  define PERL_FPU_PRE_EXEC   {
#  define PERL_FPU_POST_EXEC  }
#endif

/* In Tru64 the cc -ieee enables the IEEE math but disables traps.
 * We need to reenable the "invalid" trap because otherwise generation
 * of NaN values leaves the IEEE fp flags in bad state, leaving any further
 * fp ops behaving strangely (Inf + 1 resulting in zero, for example). */
#ifdef __osf__
#  include <machine/fpu.h>
#  define PERL_SYS_FPU_INIT \
     STMT_START { \
         ieee_set_fp_control(IEEE_TRAP_ENABLE_INV); \
         signal(SIGFPE, SIG_IGN); \
     } STMT_END
#endif
/* In IRIX the default for Flush to Zero bit is true,
 * which means that results going below the minimum of normal
 * floating points go to zero, instead of going denormal/subnormal.
 * This is unlike almost any other system running Perl, so let's clear it.
 * [perl #123767] IRIX64 blead (ddce084a) opbasic/arith.t failure, originally
 * [perl #120426] small numbers shouldn't round to zero if they have extra floating digits
 *
 * XXX The flush-to-zero behaviour should be a Configure scan.
 * To change the behaviour usually requires some system-specific
 * incantation, though, like the below. */
#ifdef __sgi
#  include <sys/fpu.h>
#  define PERL_SYS_FPU_INIT \
     STMT_START { \
         union fpc_csr csr; \
         csr.fc_word = get_fpc_csr(); \
         csr.fc_struct.flush = 0; \
         set_fpc_csr(csr.fc_word); \
     } STMT_END
#endif

#ifndef PERL_SYS_FPU_INIT
#  define PERL_SYS_FPU_INIT NOOP
#endif

#ifndef PERL_SYS_INIT3_BODY
#  define PERL_SYS_INIT3_BODY(argvp,argcp,envp) PERL_SYS_INIT_BODY(argvp,argcp)
#endif

/*
=head1 Miscellaneous Functions

=for apidoc Am|void|PERL_SYS_INIT|int *argc|char*** argv
Provides system-specific tune up of the C runtime environment necessary to
run Perl interpreters.  This should be called only once, before creating
any Perl interpreters.

=for apidoc Am|void|PERL_SYS_INIT3|int *argc|char*** argv|char*** env
Provides system-specific tune up of the C runtime environment necessary to
run Perl interpreters.  This should be called only once, before creating
any Perl interpreters.

=for apidoc Am|void|PERL_SYS_TERM|
Provides system-specific clean up of the C runtime environment after
running Perl interpreters.  This should be called only once, after
freeing any remaining Perl interpreters.

=cut
 */

#define PERL_SYS_INIT(argc, argv)	Perl_sys_init(argc, argv)
#define PERL_SYS_INIT3(argc, argv, env)	Perl_sys_init3(argc, argv, env)
#define PERL_SYS_TERM()			Perl_sys_term()

#ifndef PERL_WRITE_MSG_TO_CONSOLE
#  define PERL_WRITE_MSG_TO_CONSOLE(io, msg, len) PerlIO_write(io, msg, len)
#endif

#ifndef MAXPATHLEN
#  ifdef PATH_MAX
#    ifdef _POSIX_PATH_MAX
#       if PATH_MAX > _POSIX_PATH_MAX
/* POSIX 1990 (and pre) was ambiguous about whether PATH_MAX
 * included the null byte or not.  Later amendments of POSIX,
 * XPG4, the Austin Group, and the Single UNIX Specification
 * all explicitly include the null byte in the PATH_MAX.
 * Ditto for _POSIX_PATH_MAX. */
#         define MAXPATHLEN PATH_MAX
#       else
#         define MAXPATHLEN _POSIX_PATH_MAX
#       endif
#    else
#      define MAXPATHLEN (PATH_MAX+1)
#    endif
#  else
#    define MAXPATHLEN 1024	/* Err on the large side. */
#  endif
#endif

/* In case Configure was not used (we are using a "canned config"
 * such as Win32, or a cross-compilation setup, for example) try going
 * by the gcc major and minor versions.  One useful URL is
 * http://www.ohse.de/uwe/articles/gcc-attributes.html,
 * but contrary to this information warn_unused_result seems
 * not to be in gcc 3.3.5, at least. --jhi
 * Also, when building extensions with an installed perl, this allows
 * the user to upgrade gcc and get the right attributes, rather than
 * relying on the list generated at Configure time.  --AD
 * Set these up now otherwise we get confused when some of the <*thread.h>
 * includes below indirectly pull in <perlio.h> (which needs to know if we
 * have HASATTRIBUTE_FORMAT).
 */

#ifndef PERL_MICRO
#if defined __GNUC__ && !defined(__INTEL_COMPILER)
#  if __GNUC__ == 3 && __GNUC_MINOR__ >= 1 || __GNUC__ > 3 /* 3.1 -> */
#    define HASATTRIBUTE_DEPRECATED
#  endif
#  if __GNUC__ >= 3 /* 3.0 -> */ /* XXX Verify this version */
#    define HASATTRIBUTE_FORMAT
#    if defined __MINGW32__
#      define PRINTF_FORMAT_NULL_OK
#    endif
#  endif
#  if __GNUC__ >= 3 /* 3.0 -> */
#    define HASATTRIBUTE_MALLOC
#  endif
#  if __GNUC__ == 3 && __GNUC_MINOR__ >= 3 || __GNUC__ > 3 /* 3.3 -> */
#    define HASATTRIBUTE_NONNULL
#  endif
#  if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 || __GNUC__ > 2 /* 2.5 -> */
#    define HASATTRIBUTE_NORETURN
#  endif
#  if __GNUC__ >= 3 /* gcc 3.0 -> */
#    define HASATTRIBUTE_PURE
#  endif
#  if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3 /* 3.4 -> */
#    define HASATTRIBUTE_UNUSED
#  endif
#  if __GNUC__ == 3 && __GNUC_MINOR__ == 3 && !defined(__cplusplus)
#    define HASATTRIBUTE_UNUSED /* gcc-3.3, but not g++-3.3. */
#  endif
#  if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3 /* 3.4 -> */
#    define HASATTRIBUTE_WARN_UNUSED_RESULT
#  endif
#endif
#endif /* #ifndef PERL_MICRO */

/* USE_5005THREADS needs to be after unixish.h as <pthread.h> includes
 * <sys/signal.h> which defines NSIG - which will stop inclusion of <signal.h>
 * this results in many functions being undeclared which bothers C++
 * May make sense to have threads after "*ish.h" anyway
 */

/* clang Thread Safety Analysis/Annotations/Attributes
 * http://clang.llvm.org/docs/ThreadSafetyAnalysis.html
 *
 * Available since clang 3.6-ish (appeared in 3.4, but shaky still in 3.5).
 * Apple XCode hijacks __clang_major__ and __clang_minor__
 * (6.1 means really clang 3.6), so needs extra hijinks
 * (could probably also test the contents of __apple_build_version__).
 */
#if defined(USE_ITHREADS) && defined(I_PTHREAD) && \
    defined(__clang__) && \
    !defined(PERL_GLOBAL_STRUCT) && \
    !defined(PERL_GLOBAL_STRUCT_PRIVATE) && \
    !defined(SWIG) && \
  ((!defined(__apple_build_version__) &&               \
    ((__clang_major__ == 3 && __clang_minor__ >= 6) || \
     (__clang_major__ >= 4))) || \
   (defined(__apple_build_version__) &&                \
    ((__clang_major__ == 6 && __clang_minor__ >= 1) || \
     (__clang_major__ >= 7))))
#  define PERL_TSA__(x)   __attribute__((x))
#  define PERL_TSA_ACTIVE
#else
#  define PERL_TSA__(x)   /* No TSA, make TSA attributes no-ops. */
#  undef PERL_TSA_ACTIVE
#endif

/* PERL_TSA_CAPABILITY() is used to annotate typedefs.
 * typedef old_type PERL_TSA_CAPABILITY("mutex") new_type;
 */
#define PERL_TSA_CAPABILITY(x) \
    PERL_TSA__(capability(x))

/* In the below examples the mutex must be lexically visible, usually
 * either as global variables, or as function arguments. */

/* PERL_TSA_GUARDED_BY() is used to annotate global variables.
 *
 * Foo foo PERL_TSA_GUARDED_BY(mutex);
 */
#define PERL_TSA_GUARDED_BY(x) \
    PERL_TSA__(guarded_by(x))

/* PERL_TSA_PT_GUARDED_BY() is used to annotate global pointers.
 * The data _behind_ the pointer is guarded.
 *
 * Foo* ptr PERL_TSA_PT_GUARDED_BY(mutex);
 */
#define PERL_TSA_PT_GUARDED_BY(x) \
    PERL_TSA__(pt_guarded_by(x))

/* PERL_TSA_REQUIRES() is used to annotate functions.
 * The caller MUST hold the resource when calling the function.
 *
 * void Foo() PERL_TSA_REQUIRES(mutex);
 */
#define PERL_TSA_REQUIRES(x) \
    PERL_TSA__(requires_capability(x))

/* PERL_TSA_EXCLUDES() is used to annotate functions.
 * The caller MUST NOT hold resource when calling the function.
 *
 * EXCLUDES should be used when the function first acquires
 * the resource and then releases it.  Use to avoid deadlock.
 *
 * void Foo() PERL_TSA_EXCLUDES(mutex);
 */
#define PERL_TSA_EXCLUDES(x) \
    PERL_TSA__(locks_excluded(x))

/* PERL_TSA_ACQUIRE() is used to annotate functions.
 * The caller MUST NOT hold the resource when calling the function,
 * and the function will acquire the resource.
 *
 * void Foo() PERL_TSA_ACQUIRE(mutex);
 */
#define PERL_TSA_ACQUIRE(x) \
    PERL_TSA__(acquire_capability(x))

/* PERL_TSA_RELEASE() is used to annotate functions.
 * The caller MUST hold the resource when calling the function,
 * and the function will release the resource.
 *
 * void Foo() PERL_TSA_RELEASE(mutex);
 */
#define PERL_TSA_RELEASE(x) \
    PERL_TSA__(release_capability(x))

/* PERL_TSA_NO_TSA is used to annotate functions.
 * Used when being intentionally unsafe, or when the code is too
 * complicated for the analysis.  Use sparingly.
 *
 * void Foo() PERL_TSA_NO_TSA;
 */
#define PERL_TSA_NO_TSA \
    PERL_TSA__(no_thread_safety_analysis)

/* There are more annotations/attributes available, see the clang
 * documentation for details. */

#if defined(USE_ITHREADS)
#  ifdef NETWARE
#    include <nw5thread.h>
#  elif defined(WIN32)
#    include <win32thread.h>
#  elif defined(OS2)
#    include "os2thread.h"
#  elif defined(I_MACH_CTHREADS)
#    include <mach/cthreads.h>
typedef cthread_t	perl_os_thread;
typedef mutex_t		perl_mutex;
typedef condition_t	perl_cond;
typedef void *		perl_key;
#  elif defined(I_PTHREAD) /* Posix threads */
#    include <pthread.h>
typedef pthread_t	perl_os_thread;
typedef pthread_mutex_t PERL_TSA_CAPABILITY("mutex") perl_mutex;
typedef pthread_cond_t	perl_cond;
typedef pthread_key_t	perl_key;
#  endif
#endif /* USE_ITHREADS */

#ifdef PERL_TSA_ACTIVE
/* Since most pthread mutex interfaces have not been annotated, we
 * need to have these wrappers. The NO_TSA annotation is quite ugly
 * but it cannot be avoided in plain C, unlike in C++, where one could
 * e.g. use ACQUIRE() with no arg on a mutex lock method.
 *
 * The bodies of these wrappers are in util.c
 *
 * TODO: however, some platforms are starting to get these clang
 * thread safety annotations for pthreads, for example FreeBSD.
 * Do we need a way to a bypass these wrappers? */
EXTERN_C int perl_tsa_mutex_lock(perl_mutex* mutex)
  PERL_TSA_ACQUIRE(*mutex)
  PERL_TSA_NO_TSA;
EXTERN_C int perl_tsa_mutex_unlock(perl_mutex* mutex)
  PERL_TSA_RELEASE(*mutex)
  PERL_TSA_NO_TSA;
#endif

#if defined(WIN32)
#  include "win32.h"
#endif

#ifdef NETWARE
#  include "netware.h"
#endif

#define STATUS_UNIX	PL_statusvalue
#ifdef VMS
#   define STATUS_NATIVE	PL_statusvalue_vms
/*
 * vaxc$errno is only guaranteed to be valid if errno == EVMSERR, otherwise
 * its contents can not be trusted.  Unfortunately, Perl seems to check
 * it on exit, so it when PL_statusvalue_vms is updated, vaxc$errno should
 * be updated also.
 */
#  include <stsdef.h>
#  include <ssdef.h>
/* Presume this because if VMS changes it, it will require a new
 * set of APIs for waiting on children for binary compatibility.
 */
#  define child_offset_bits (8)
#  ifndef C_FAC_POSIX
#  define C_FAC_POSIX 0x35A000
#  endif

/*  STATUS_EXIT - validates and returns a NATIVE exit status code for the
 * platform from the existing UNIX or Native status values.
 */

#   define STATUS_EXIT \
	(((I32)PL_statusvalue_vms == -1 ? SS$_ABORT : PL_statusvalue_vms) | \
	   (VMSISH_HUSHED ? STS$M_INHIB_MSG : 0))


/* STATUS_NATIVE_CHILD_SET - Calculate UNIX status that matches the child
 * exit code and shifts the UNIX value over the correct number of bits to
 * be a child status.  Usually the number of bits is 8, but that could be
 * platform dependent.  The NATIVE status code is presumed to have either
 * from a child process.
 */

/* This is complicated.  The child processes return a true native VMS
   status which must be saved.  But there is an assumption in Perl that
   the UNIX child status has some relationship to errno values, so
   Perl tries to translate it to text in some of the tests.
   In order to get the string translation correct, for the error, errno
   must be EVMSERR, but that generates a different text message
   than what the test programs are expecting.  So an errno value must
   be derived from the native status value when an error occurs.
   That will hide the true native status message.  With this version of
   perl, the true native child status can always be retrieved so that
   is not a problem.  But in this case, Pl_statusvalue and errno may
   have different values in them.
 */

#   define STATUS_NATIVE_CHILD_SET(n) \
	STMT_START {							\
	    I32 evalue = (I32)n;					\
	    if (evalue == EVMSERR) {					\
	      PL_statusvalue_vms = vaxc$errno;				\
	      PL_statusvalue = evalue;					\
	    } else {							\
	      PL_statusvalue_vms = evalue;				\
	      if (evalue == -1) {					\
		PL_statusvalue = -1;					\
		PL_statusvalue_vms = SS$_ABORT; /* Should not happen */ \
	      } else							\
		PL_statusvalue = Perl_vms_status_to_unix(evalue, 1);	\
	      set_vaxc_errno(evalue);					\
	      if ((PL_statusvalue_vms & C_FAC_POSIX) == C_FAC_POSIX)	\
		  set_errno(EVMSERR);					\
	      else set_errno(Perl_vms_status_to_unix(evalue, 0));	\
	      PL_statusvalue = PL_statusvalue << child_offset_bits;	\
	    }								\
	} STMT_END

#   ifdef VMSISH_STATUS
#	define STATUS_CURRENT	(VMSISH_STATUS ? STATUS_NATIVE : STATUS_UNIX)
#   else
#	define STATUS_CURRENT	STATUS_UNIX
#   endif

  /* STATUS_UNIX_SET - takes a UNIX/POSIX errno value and attempts to update
   * the NATIVE status to an equivalent value.  Can not be used to translate
   * exit code values as exit code values are not guaranteed to have any
   * relationship at all to errno values.
   * This is used when Perl is forcing errno to have a specific value.
   */
#   define STATUS_UNIX_SET(n)				\
	STMT_START {					\
	    I32 evalue = (I32)n;			\
	    PL_statusvalue = evalue;			\
	    if (PL_statusvalue != -1) {			\
		if (PL_statusvalue != EVMSERR) {	\
		  PL_statusvalue &= 0xFFFF;		\
		  if (MY_POSIX_EXIT)			\
		    PL_statusvalue_vms=PL_statusvalue ? SS$_ABORT : SS$_NORMAL;\
		  else PL_statusvalue_vms = Perl_unix_status_to_vms(evalue); \
		}					\
		else {					\
		  PL_statusvalue_vms = vaxc$errno;	\
		}					\
	    }						\
	    else PL_statusvalue_vms = SS$_ABORT;	\
	    set_vaxc_errno(PL_statusvalue_vms);		\
	} STMT_END

  /* STATUS_UNIX_EXIT_SET - Takes a UNIX/POSIX exit code and sets
   * the NATIVE error status based on it.
   *
   * When in the default mode to comply with the Perl VMS documentation,
   * 0 is a success and any other code sets the NATIVE status to a failure
   * code of SS$_ABORT.
   *
   * In the new POSIX EXIT mode, native status will be set so that the
   * actual exit code will can be retrieved by the calling program or
   * shell.
   *
   * If the exit code is not clearly a UNIX parent or child exit status,
   * it will be passed through as a VMS status.
   */

#   define STATUS_UNIX_EXIT_SET(n)			\
	STMT_START {					\
	    I32 evalue = (I32)n;			\
	    PL_statusvalue = evalue;			\
	    if (MY_POSIX_EXIT) { \
	      if (evalue <= 0xFF00) {		\
		  if (evalue > 0xFF)			\
		    evalue = (evalue >> child_offset_bits) & 0xFF; \
		  PL_statusvalue_vms =		\
		    (C_FAC_POSIX | (evalue << 3 ) |	\
		    ((evalue == 1) ? (STS$K_ERROR | STS$M_INHIB_MSG) : 1)); \
	      } else /* forgive them Perl, for they have sinned */ \
		PL_statusvalue_vms = evalue; \
	    } else { \
	      if (evalue == 0)			\
		PL_statusvalue_vms = SS$_NORMAL;	\
	      else if (evalue <= 0xFF00) \
		PL_statusvalue_vms = SS$_ABORT; \
	      else { /* forgive them Perl, for they have sinned */ \
		  if (evalue != EVMSERR) PL_statusvalue_vms = evalue; \
		  else PL_statusvalue_vms = vaxc$errno;	\
		  /* And obviously used a VMS status value instead of UNIX */ \
		  PL_statusvalue = EVMSERR;		\
	      } \
	      set_vaxc_errno(PL_statusvalue_vms);	\
	    }						\
	} STMT_END


  /* STATUS_EXIT_SET - Takes a NATIVE/UNIX/POSIX exit code
   * and sets the NATIVE error status based on it.  This special case
   * is needed to maintain compatibility with past VMS behavior.
   *
   * In the default mode on VMS, this number is passed through as
   * both the NATIVE and UNIX status.  Which makes it different
   * that the STATUS_UNIX_EXIT_SET.
   *
   * In the new POSIX EXIT mode, native status will be set so that the
   * actual exit code will can be retrieved by the calling program or
   * shell.
   *
   * A POSIX exit code is from 0 to 255.  If the exit code is higher
   * than this, it needs to be assumed that it is a VMS exit code and
   * passed through.
   */

#   define STATUS_EXIT_SET(n)				\
	STMT_START {					\
	    I32 evalue = (I32)n;			\
	    PL_statusvalue = evalue;			\
	    if (MY_POSIX_EXIT)				\
		if (evalue > 255) PL_statusvalue_vms = evalue; else {	\
		  PL_statusvalue_vms = \
		    (C_FAC_POSIX | (evalue << 3 ) |	\
		     ((evalue == 1) ? (STS$K_ERROR | STS$M_INHIB_MSG) : 1));} \
	    else					\
		PL_statusvalue_vms = evalue ? evalue : SS$_NORMAL; \
	    set_vaxc_errno(PL_statusvalue_vms);		\
	} STMT_END


 /* This macro forces a success status */
#   define STATUS_ALL_SUCCESS	\
	(PL_statusvalue = 0, PL_statusvalue_vms = SS$_NORMAL)

 /* This macro forces a failure status */
#   define STATUS_ALL_FAILURE	(PL_statusvalue = 1, \
     vaxc$errno = PL_statusvalue_vms = MY_POSIX_EXIT ? \
	(C_FAC_POSIX | (1 << 3) | STS$K_ERROR | STS$M_INHIB_MSG) : SS$_ABORT)

#elif defined(__amigaos4__)
 /* A somewhat experimental attempt to simulate posix return code values */
#   define STATUS_NATIVE	PL_statusvalue_posix
#   define STATUS_NATIVE_CHILD_SET(n)                      \
        STMT_START {                                       \
            PL_statusvalue_posix = (n);                    \
            if (PL_statusvalue_posix < 0) {                \
                PL_statusvalue = -1;                       \
            }                                              \
            else {                                         \
                PL_statusvalue = n << 8;                   \
            }                                              \
        } STMT_END
#   define STATUS_UNIX_SET(n)		\
	STMT_START {			\
	    PL_statusvalue = (n);		\
	    if (PL_statusvalue != -1)	\
		PL_statusvalue &= 0xFFFF;	\
	} STMT_END
#   define STATUS_UNIX_EXIT_SET(n) STATUS_UNIX_SET(n)
#   define STATUS_EXIT_SET(n) STATUS_UNIX_SET(n)
#   define STATUS_CURRENT STATUS_UNIX
#   define STATUS_EXIT STATUS_UNIX
#   define STATUS_ALL_SUCCESS	(PL_statusvalue = 0, PL_statusvalue_posix = 0)
#   define STATUS_ALL_FAILURE	(PL_statusvalue = 1, PL_statusvalue_posix = 1)

#else
#   define STATUS_NATIVE	PL_statusvalue_posix
#   if defined(WCOREDUMP)
#       define STATUS_NATIVE_CHILD_SET(n)                  \
            STMT_START {                                   \
                PL_statusvalue_posix = (n);                \
                if (PL_statusvalue_posix == -1)            \
                    PL_statusvalue = -1;                   \
                else {                                     \
                    PL_statusvalue =                       \
                        (WIFEXITED(PL_statusvalue_posix) ? (WEXITSTATUS(PL_statusvalue_posix) << 8) : 0) |  \
                        (WIFSIGNALED(PL_statusvalue_posix) ? (WTERMSIG(PL_statusvalue_posix) & 0x7F) : 0) | \
                        (WIFSIGNALED(PL_statusvalue_posix) && WCOREDUMP(PL_statusvalue_posix) ? 0x80 : 0);  \
                }                                          \
            } STMT_END
#   elif defined(WIFEXITED)
#       define STATUS_NATIVE_CHILD_SET(n)                  \
            STMT_START {                                   \
                PL_statusvalue_posix = (n);                \
                if (PL_statusvalue_posix == -1)            \
                    PL_statusvalue = -1;                   \
                else {                                     \
                    PL_statusvalue =                       \
                        (WIFEXITED(PL_statusvalue_posix) ? (WEXITSTATUS(PL_statusvalue_posix) << 8) : 0) |  \
                        (WIFSIGNALED(PL_statusvalue_posix) ? (WTERMSIG(PL_statusvalue_posix) & 0x7F) : 0);  \
                }                                          \
            } STMT_END
#   else
#       define STATUS_NATIVE_CHILD_SET(n)                  \
            STMT_START {                                   \
                PL_statusvalue_posix = (n);                \
                if (PL_statusvalue_posix == -1)            \
                    PL_statusvalue = -1;                   \
                else {                                     \
                    PL_statusvalue =                       \
                        PL_statusvalue_posix & 0xFFFF;     \
                }                                          \
            } STMT_END
#   endif
#   define STATUS_UNIX_SET(n)		\
	STMT_START {			\
	    PL_statusvalue = (n);		\
	    if (PL_statusvalue != -1)	\
		PL_statusvalue &= 0xFFFF;	\
	} STMT_END
#   define STATUS_UNIX_EXIT_SET(n) STATUS_UNIX_SET(n)
#   define STATUS_EXIT_SET(n) STATUS_UNIX_SET(n)
#   define STATUS_CURRENT STATUS_UNIX
#   define STATUS_EXIT STATUS_UNIX
#   define STATUS_ALL_SUCCESS	(PL_statusvalue = 0, PL_statusvalue_posix = 0)
#   define STATUS_ALL_FAILURE	(PL_statusvalue = 1, PL_statusvalue_posix = 1)
#endif

/* flags in PL_exit_flags for nature of exit() */
#define PERL_EXIT_EXPECTED	0x01
#define PERL_EXIT_DESTRUCT_END  0x02  /* Run END in perl_destruct */
#define PERL_EXIT_WARN		0x04  /* Warn if Perl_my_exit() or Perl_my_failure_exit() called */
#define PERL_EXIT_ABORT		0x08  /* Call abort() if Perl_my_exit() or Perl_my_failure_exit() called */

#ifndef PERL_CORE
/* format to use for version numbers in file/directory names */
/* XXX move to Configure? */
/* This was only ever used for the current version, and that can be done at
   compile time, as PERL_FS_VERSION, so should we just delete it?  */
#  ifndef PERL_FS_VER_FMT
#    define PERL_FS_VER_FMT	"%d.%d.%d"
#  endif
#endif

#ifndef PERL_FS_VERSION
#  define PERL_FS_VERSION	PERL_VERSION_STRING
#endif

/* This defines a way to flush all output buffers.  This may be a
 * performance issue, so we allow people to disable it.  Also, if
 * we are using stdio, there are broken implementations of fflush(NULL)
 * out there, Solaris being the most prominent.
 */
#ifndef PERL_FLUSHALL_FOR_CHILD
# if defined(USE_PERLIO) || defined(FFLUSH_NULL)
#  define PERL_FLUSHALL_FOR_CHILD	PerlIO_flush((PerlIO*)NULL)
# elif defined(FFLUSH_ALL)
#  define PERL_FLUSHALL_FOR_CHILD	my_fflush_all()
# else
#  define PERL_FLUSHALL_FOR_CHILD	NOOP
# endif
#endif

#ifndef PERL_WAIT_FOR_CHILDREN
#  define PERL_WAIT_FOR_CHILDREN	NOOP
#endif

/* the traditional thread-unsafe notion of "current interpreter". */
#ifndef PERL_SET_INTERP
#  define PERL_SET_INTERP(i)		(PL_curinterp = (PerlInterpreter*)(i))
#endif

#ifndef PERL_GET_INTERP
#  define PERL_GET_INTERP		(PL_curinterp)
#endif

#if defined(PERL_IMPLICIT_CONTEXT) && !defined(PERL_GET_THX)
#  ifdef MULTIPLICITY
#    define PERL_GET_THX		((PerlInterpreter *)PERL_GET_CONTEXT)
#  endif
#  define PERL_SET_THX(t)		PERL_SET_CONTEXT(t)
#endif

/*
    This replaces the previous %_ "hack" by the "%p" hacks.
    All that is required is that the perl source does not
    use "%-p" or "%-<number>p" or "%<number>p" formats.
    These formats will still work in perl code.
    See comments in sv.c for further details.

    Robin Barker 2005-07-14

    No longer use %1p for VDf = %vd.  RMB 2007-10-19
*/

#ifndef SVf_
#  define SVf_(n) "-" STRINGIFY(n) "p"
#endif

#ifndef SVf
#  define SVf "-p"
#endif

#ifndef SVf32
#  define SVf32 SVf_(32)
#endif

#ifndef SVf256
#  define SVf256 SVf_(256)
#endif

#define SVfARG(p) ((void*)(p))

#ifndef HEKf
#  define HEKf "2p"
#endif

/* Not ideal, but we cannot easily include a number in an already-numeric
 * format sequence. */
#ifndef HEKf256
#  define HEKf256 "3p"
#endif

#define HEKfARG(p) ((void*)(p))

/* Takes three arguments: is_utf8, length, str */
#ifndef UTF8f
#  define UTF8f "d%" UVuf "%4p"
#endif
#define UTF8fARG(u,l,p) (int)cBOOL(u), (UV)(l), (void*)(p)

#define PNf UTF8f
#define PNfARG(pn) (int)1, (UV)PadnameLEN(pn), (void *)PadnamePV(pn)

#ifdef PERL_CORE
/* not used; but needed for backward compatibility with XS code? - RMB */
#  undef UVf
#elif !defined(UVf)
#  define UVf UVuf
#endif

#ifdef HASATTRIBUTE_DEPRECATED
#  define __attribute__deprecated__         __attribute__((deprecated))
#endif
#ifdef HASATTRIBUTE_FORMAT
#  define __attribute__format__(x,y,z)      __attribute__((format(x,y,z)))
#endif
#ifdef HASATTRIBUTE_MALLOC
#  define __attribute__malloc__             __attribute__((__malloc__))
#endif
#ifdef HASATTRIBUTE_NONNULL
#  define __attribute__nonnull__(a)         __attribute__((nonnull(a)))
#endif
#ifdef HASATTRIBUTE_NORETURN
#  define __attribute__noreturn__           __attribute__((noreturn))
#endif
#ifdef HASATTRIBUTE_PURE
#  define __attribute__pure__               __attribute__((pure))
#endif
#ifdef HASATTRIBUTE_UNUSED
#  define __attribute__unused__             __attribute__((unused))
#endif
#ifdef HASATTRIBUTE_WARN_UNUSED_RESULT
#  define __attribute__warn_unused_result__ __attribute__((warn_unused_result))
#endif

/* If we haven't defined the attributes yet, define them to blank. */
#ifndef __attribute__deprecated__
#  define __attribute__deprecated__
#endif
#ifndef __attribute__format__
#  define __attribute__format__(x,y,z)
#endif
#ifndef __attribute__malloc__
#  define __attribute__malloc__
#endif
#ifndef __attribute__nonnull__
#  define __attribute__nonnull__(a)
#endif
#ifndef __attribute__noreturn__
#  define __attribute__noreturn__
#endif
#ifndef __attribute__pure__
#  define __attribute__pure__
#endif
#ifndef __attribute__unused__
#  define __attribute__unused__
#endif
#ifndef __attribute__warn_unused_result__
#  define __attribute__warn_unused_result__
#endif

#if !defined(DEBUGGING) && !defined(NDEBUG)
#  define NDEBUG 1
#endif
#include <assert.h>

/* For functions that are marked as __attribute__noreturn__, it's not
   appropriate to call return.  In either case, include the lint directive.
 */
#ifdef HASATTRIBUTE_NORETURN
#  define NORETURN_FUNCTION_END NOT_REACHED;
#else
#  define NORETURN_FUNCTION_END NOT_REACHED; return 0
#endif

/* Some OS warn on NULL format to printf */
#ifdef PRINTF_FORMAT_NULL_OK
#  define __attribute__format__null_ok__(x,y,z)  __attribute__format__(x,y,z)
#else
#  define __attribute__format__null_ok__(x,y,z)
#endif

#ifdef HAS_BUILTIN_EXPECT
#  define EXPECT(expr,val)                  __builtin_expect(expr,val)
#else
#  define EXPECT(expr,val)                  (expr)
#endif
#define LIKELY(cond)                        EXPECT(cBOOL(cond),TRUE)
#define UNLIKELY(cond)                      EXPECT(cBOOL(cond),FALSE)
#ifdef HAS_BUILTIN_CHOOSE_EXPR
/* placeholder */
#endif

/* STATIC_ASSERT_DECL/STATIC_ASSERT_STMT are like assert(), but for compile
   time invariants. That is, their argument must be a constant expression that
   can be verified by the compiler. This expression can contain anything that's
   known to the compiler, e.g. #define constants, enums, or sizeof (...). If
   the expression evaluates to 0, compilation fails.
   Because they generate no runtime code (i.e.  their use is "free"), they're
   always active, even under non-DEBUGGING builds.
   STATIC_ASSERT_DECL expands to a declaration and is suitable for use at
   file scope (outside of any function).
   STATIC_ASSERT_STMT expands to a statement and is suitable for use inside a
   function.
*/
#if (defined(static_assert) || (defined(__cplusplus) && __cplusplus >= 201103L)) && (!defined(__IBMC__) || __IBMC__ >= 1210)
/* static_assert is a macro defined in <assert.h> in C11 or a compiler
   builtin in C++11.  But IBM XL C V11 does not support _Static_assert, no
   matter what <assert.h> says.
*/
#  define STATIC_ASSERT_DECL(COND) static_assert(COND, #COND)
#else
/* We use a bit-field instead of an array because gcc accepts
   'typedef char x[n]' where n is not a compile-time constant.
   We want to enforce constantness.
*/
#  define STATIC_ASSERT_2(COND, SUFFIX) \
    typedef struct { \
        unsigned int _static_assertion_failed_##SUFFIX : (COND) ? 1 : -1; \
    } _static_assertion_failed_##SUFFIX PERL_UNUSED_DECL
#  define STATIC_ASSERT_1(COND, SUFFIX) STATIC_ASSERT_2(COND, SUFFIX)
#  define STATIC_ASSERT_DECL(COND)    STATIC_ASSERT_1(COND, __LINE__)
#endif
/* We need this wrapper even in C11 because 'case X: static_assert(...);' is an
   error (static_assert is a declaration, and only statements can have labels).
*/
#define STATIC_ASSERT_STMT(COND)      STMT_START { STATIC_ASSERT_DECL(COND); } STMT_END

#ifndef __has_builtin
#  define __has_builtin(x) 0 /* not a clang style compiler */
#endif

/* ASSUME is like assert(), but it has a benefit in a release build. It is a
   hint to a compiler about a statement of fact in a function call free
   expression, which allows the compiler to generate better machine code.
   In a debug build, ASSUME(x) is a synonym for assert(x). ASSUME(0) means
   the control path is unreachable. In a for loop, ASSUME can be used to hint
   that a loop will run at least X times. ASSUME is based off MSVC's __assume
   intrinsic function, see its documents for more details.
*/

#ifndef DEBUGGING
#  if __has_builtin(__builtin_unreachable) \
     || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5 || __GNUC__ > 4) /* 4.5 -> */
#    define ASSUME(x) ((x) ? (void) 0 : __builtin_unreachable())
#  elif defined(_MSC_VER)
#    define ASSUME(x) __assume(x)
#  elif defined(__ARMCC_VERSION) /* untested */
#    define ASSUME(x) __promise(x)
#  else
/* a random compiler might define assert to its own special optimization token
   so pass it through to C lib as a last resort */
#    define ASSUME(x) assert(x)
#  endif
#else
#  define ASSUME(x) assert(x)
#endif

#if defined(__sun)      /* ASSUME() generates warnings on Solaris */
#  define NOT_REACHED
#elif defined(DEBUGGING) && (__has_builtin(__builtin_unreachable) \
     || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5 || __GNUC__ > 4)) /* 4.5 -> */
#  define NOT_REACHED STMT_START { ASSUME(0); __builtin_unreachable(); } STMT_END
#else
#  define NOT_REACHED ASSUME(0)
#endif

/* Some unistd.h's give a prototype for pause() even though
   HAS_PAUSE ends up undefined.  This causes the #define
   below to be rejected by the compiler.  Sigh.
*/
#ifdef HAS_PAUSE
#define Pause	pause
#else
#define Pause() sleep((32767<<16)+32767)
#endif

#ifndef IOCPARM_LEN
#   ifdef IOCPARM_MASK
	/* on BSDish systems we're safe */
#	define IOCPARM_LEN(x)  (((x) >> 16) & IOCPARM_MASK)
#   elif defined(_IOC_SIZE) && defined(__GLIBC__)
	/* on Linux systems we're safe; except when we're not [perl #38223] */
#	define IOCPARM_LEN(x) (_IOC_SIZE(x) < 256 ? 256 : _IOC_SIZE(x))
#   else
	/* otherwise guess at what's safe */
#	define IOCPARM_LEN(x)	256
#   endif
#endif

#if defined(__CYGWIN__)
/* USEMYBINMODE
 *   This symbol, if defined, indicates that the program should
 *   use the routine my_binmode(FILE *fp, char iotype, int mode) to insure
 *   that a file is in "binary" mode -- that is, that no translation
 *   of bytes occurs on read or write operations.
 */
#  define USEMYBINMODE /**/
#  include <io.h> /* for setmode() prototype */
#  define my_binmode(fp, iotype, mode) \
            cBOOL(PerlLIO_setmode(fileno(fp), mode) != -1)
#endif

#ifdef __CYGWIN__
void init_os_extras(void);
#endif

#ifdef UNION_ANY_DEFINITION
UNION_ANY_DEFINITION;
#else
union any {
    void*	any_ptr;
    SV*         any_sv;
    SV**        any_svp;
    GV*         any_gv;
    AV*         any_av;
    HV*         any_hv;
    OP*         any_op;
    char*       any_pv;
    char**      any_pvp;
    I32		any_i32;
    U32		any_u32;
    IV		any_iv;
    UV		any_uv;
    long	any_long;
    bool	any_bool;
    void	(*any_dptr) (void*);
    void	(*any_dxptr) (pTHX_ void*);
};
#endif

typedef I32 (*filter_t) (pTHX_ int, SV *, int);

#define FILTER_READ(idx, sv, len)  filter_read(idx, sv, len)
#define FILTER_DATA(idx) \
	    (PL_parser ? AvARRAY(PL_parser->rsfp_filters)[idx] : NULL)
#define FILTER_ISREADER(idx) \
	    (PL_parser && PL_parser->rsfp_filters \
		&& idx >= AvFILLp(PL_parser->rsfp_filters))
#define PERL_FILTER_EXISTS(i) \
	    (PL_parser && PL_parser->rsfp_filters \
		&& (i) <= av_tindex(PL_parser->rsfp_filters))

#if defined(_AIX) && !defined(_AIX43)
#if defined(USE_REENTRANT) || defined(_REENTRANT) || defined(_THREAD_SAFE)
/* We cannot include <crypt.h> to get the struct crypt_data
 * because of setkey prototype problems when threading */
typedef        struct crypt_data {     /* straight from /usr/include/crypt.h */
    /* From OSF, Not needed in AIX
       char C[28], D[28];
    */
    char E[48];
    char KS[16][48];
    char block[66];
    char iobuf[16];
} CRYPTD;
#endif /* threading */
#endif /* AIX */

#ifndef PERL_CALLCONV
#  ifdef __cplusplus
#    define PERL_CALLCONV extern "C"
#  else
#    define PERL_CALLCONV
#  endif
#endif
#ifndef PERL_CALLCONV_NO_RET
#    define PERL_CALLCONV_NO_RET PERL_CALLCONV
#endif

/* PERL_STATIC_NO_RET is supposed to be equivalent to STATIC on builds that
   dont have a noreturn as a declaration specifier
*/
#ifndef PERL_STATIC_NO_RET
#  define PERL_STATIC_NO_RET STATIC
#endif
/* PERL_STATIC_NO_RET is supposed to be equivalent to PERL_STATIC_INLINE on
   builds that dont have a noreturn as a declaration specifier
*/
#ifndef PERL_STATIC_INLINE_NO_RET
#  define PERL_STATIC_INLINE_NO_RET PERL_STATIC_INLINE
#endif

#if !defined(OS2)
#  include "iperlsys.h"
#endif

#ifdef __LIBCATAMOUNT__
#undef HAS_PASSWD  /* unixish.h but not unixish enough. */
#undef HAS_GROUP
#define FAKE_BIT_BUCKET
#endif

/* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0.
 * Note that the USE_HASH_SEED and similar defines are *NOT* defined by
 * Configure, despite their names being similar to other defines like
 * USE_ITHREADS.  Configure in fact knows nothing about the randomised
 * hashes.  Therefore to enable/disable the hash randomisation defines
 * use the Configure -Accflags=... instead. */
#if !defined(NO_HASH_SEED) && !defined(USE_HASH_SEED)
#  define USE_HASH_SEED
#endif

#include "perly.h"


/* macros to define bit-fields in structs. */
#ifndef PERL_BITFIELD8
#  define PERL_BITFIELD8 unsigned
#endif
#ifndef PERL_BITFIELD16
#  define PERL_BITFIELD16 unsigned
#endif
#ifndef PERL_BITFIELD32
#  define PERL_BITFIELD32 unsigned
#endif

#include "sv.h"
#include "regexp.h"
#include "util.h"
#include "form.h"
#include "gv.h"
#include "pad.h"
#include "cv.h"
#include "opnames.h"
#include "op.h"
#include "hv.h"
#include "cop.h"
#include "av.h"
#include "mg.h"
#include "scope.h"
#include "warnings.h"
#include "utf8.h"

/* these would be in doio.h if there was such a file */
#define my_stat()  my_stat_flags(SV_GMAGIC)
#define my_lstat() my_lstat_flags(SV_GMAGIC)

/* defined in sv.c, but also used in [ach]v.c */
#undef _XPV_HEAD
#undef _XPVMG_HEAD
#undef _XPVCV_COMMON

#include "parser.h"

typedef struct magic_state MGS;	/* struct magic_state defined in mg.c */

#if defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_REGEXEC_C)

/* These have to be predeclared, as they are used in proto.h which is #included
 * before their definitions in regcomp.h. */

struct scan_data_t;
typedef struct regnode_charclass regnode_charclass;

struct regnode_charclass_class;

/* A hopefully less confusing name.  The sub-classes are all Posix classes only
 * used under /l matching */
typedef struct regnode_charclass_class regnode_charclass_posixl;

typedef struct regnode_ssc regnode_ssc;
typedef struct RExC_state_t RExC_state_t;
struct _reg_trie_data;

#endif

struct ptr_tbl_ent {
    struct ptr_tbl_ent*		next;
    const void*			oldval;
    void*			newval;
};

struct ptr_tbl {
    struct ptr_tbl_ent**	tbl_ary;
    UV				tbl_max;
    UV				tbl_items;
    struct ptr_tbl_arena	*tbl_arena;
    struct ptr_tbl_ent		*tbl_arena_next;
    struct ptr_tbl_ent		*tbl_arena_end;
};

#if defined(htonl) && !defined(HAS_HTONL)