-#include "iperlsys.h"
+#ifndef _PERLIO_H
+#define _PERLIO_H
+/*
+ Interface for perl to IO functions.
+ There is a hierachy of Configure determined #define controls:
+ USE_STDIO - forces PerlIO_xxx() to be #define-d onto stdio functions.
+ This is used for x2p subdirectory and for conservative
+ builds - "just like perl5.00X used to be".
+ This dominates over the others.
+
+ USE_PERLIO - The primary Configure variable that enables PerlIO.
+ If USE_PERLIO is _NOT_ set
+ then USE_STDIO above will be set to be conservative.
+ If USE_PERLIO is set
+ then there are two modes determined by USE_SFIO:
+
+ USE_SFIO - If set causes PerlIO_xxx() to be #define-d onto sfio functions.
+ A backward compatability mode for some specialist applications.
+
+ If USE_SFIO is not set then PerlIO_xxx() are real functions
+ defined in perlio.c which implement extra functionality
+ required for utf8 support.
+
+ One further note - the table-of-functions scheme controlled
+ by PERL_IMPLICIT_SYS turns on USE_PERLIO so that iperlsys.h can
+ #define PerlIO_xxx() to go via the function table, without having
+ to #undef them from (say) stdio forms.
+
+*/
+
+#if defined(PERL_IMPLICIT_SYS)
+#ifndef USE_PERLIO
+#ifndef NETWARE
+# define USE_PERLIO
+#endif
+#endif
+#endif
+
+#ifndef USE_PERLIO
+# define USE_STDIO
+#endif
+
+#ifdef USE_STDIO
+# ifndef PERLIO_IS_STDIO
+# define PERLIO_IS_STDIO
+# endif
+#endif
+
+/* -------------------- End of Configure controls ---------------------------- */
+
+/*
+ * Although we may not want stdio to be used including <stdio.h> here
+ * avoids issues where stdio.h has strange side effects
+ */
+#include <stdio.h>
+
+#if defined(USE_64_BIT_STDIO) && defined(HAS_FTELLO) && !defined(USE_FTELL64)
+#define ftell ftello
+#endif
+
+#if defined(USE_64_BIT_STDIO) && defined(HAS_FSEEKO) && !defined(USE_FSEEK64)
+#define fseek fseeko
+#endif
+
+/* BS2000 includes are sometimes a bit non standard :-( */
+#if defined(POSIX_BC) && defined(O_BINARY) && !defined(O_TEXT)
+#undef O_BINARY
+#endif
+
+#ifdef PERLIO_IS_STDIO
+/* #define PerlIO_xxxx() as equivalent stdio function */
+#include "perlsdio.h"
+#else /* PERLIO_IS_STDIO */
+#ifdef USE_SFIO
+/* #define PerlIO_xxxx() as equivalent sfio function */
+#include "perlsfio.h"
+#endif /* USE_SFIO */
+#endif /* PERLIO_IS_STDIO */
+
+#ifndef PerlIO
+/* ----------- PerlIO implementation ---------- */
+/* PerlIO not #define-d to something else - define the implementation */
+
+typedef struct _PerlIO PerlIOl;
+typedef struct _PerlIO_funcs PerlIO_funcs;
+typedef PerlIOl *PerlIO;
+#define PerlIO PerlIO
+#define PERLIO_LAYERS 1
+
+extern void PerlIO_define_layer (pTHX_ PerlIO_funcs *tab);
+extern PerlIO_funcs *PerlIO_find_layer (pTHX_ const char *name, STRLEN len, int load);
+extern PerlIO * PerlIO_push (pTHX_ PerlIO *f,PerlIO_funcs *tab,const char *mode,SV *arg);
+extern void PerlIO_pop (pTHX_ PerlIO *f);
+
+#endif /* PerlIO */
+
+/* ----------- End of implementation choices ---------- */
+
+#ifndef PERLIO_IS_STDIO
+/* Not using stdio _directly_ as PerlIO */
+
+/* We now need to determine what happens if source trys to use stdio.
+ * There are three cases based on PERLIO_NOT_STDIO which XS code
+ * can set how it wants.
+ */
+
+#ifdef PERL_CORE
+/* Make a choice for perl core code
+ - currently this is set to try and catch lingering raw stdio calls.
+ This is a known issue with some non UNIX ports which still use
+ "native" stdio features.
+*/
+#ifndef PERLIO_NOT_STDIO
+#define PERLIO_NOT_STDIO 1
+#endif
+#else
+#ifndef PERLIO_NOT_STDIO
+#define PERLIO_NOT_STDIO 0
+#endif
+#endif
+
+#ifdef PERLIO_NOT_STDIO
+#if PERLIO_NOT_STDIO
+/*
+ * PERLIO_NOT_STDIO #define'd as 1
+ * Case 1: Strong denial of stdio - make all stdio calls (we can think of) errors
+ */
+#include "nostdio.h"
+#else /* if PERLIO_NOT_STDIO */
+/*
+ * PERLIO_NOT_STDIO #define'd as 0
+ * Case 2: Declares that both PerlIO and stdio can be used
+ */
+#endif /* if PERLIO_NOT_STDIO */
+#else /* ifdef PERLIO_NOT_STDIO */
+/*
+ * PERLIO_NOT_STDIO not defined
+ * Case 3: Try and fake stdio calls as PerlIO calls
+ */
+#include "fakesdio.h"
+#endif /* ifndef PERLIO_NOT_STDIO */
+#endif /* PERLIO_IS_STDIO */
+
+#define specialCopIO(sv) ((sv) != Nullsv)
+
+/* ----------- fill in things that have not got #define'd ---------- */
+
+#ifndef Fpos_t
+#define Fpos_t Off_t
+#endif
+
+#ifndef EOF
+#define EOF (-1)
+#endif
+
+/* This is to catch case with no stdio */
+#ifndef BUFSIZ
+#define BUFSIZ 1024
+#endif
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+/* --------------------- Now prototypes for functions --------------- */
+
+START_EXTERN_C
+
+#ifndef NEXT30_NO_ATTRIBUTE
+#ifndef HASATTRIBUTE /* disable GNU-cc attribute checking? */
+#ifdef __attribute__ /* Avoid possible redefinition errors */
+#undef __attribute__
+#endif
+#define __attribute__(attr)
+#endif
+#endif
+
+#ifndef PerlIO_init
+extern void PerlIO_init (void);
+#endif
+#ifndef PerlIO_stdoutf
+extern int PerlIO_stdoutf (const char *,...)
+ __attribute__((__format__ (__printf__, 1, 2)));
+#endif
+#ifndef PerlIO_puts
+extern int PerlIO_puts (PerlIO *,const char *);
+#endif
+#ifndef PerlIO_open
+extern PerlIO * PerlIO_open (const char *,const char *);
+#endif
+#ifndef PerlIO_openn
+extern PerlIO * PerlIO_openn (pTHX_ const char *layers, const char *mode,int fd,int imode,int perm,PerlIO *old,int narg,SV **arg);
+#endif
+#ifndef PerlIO_close
+extern int PerlIO_close (PerlIO *);
+#endif
+#ifndef PerlIO_eof
+extern int PerlIO_eof (PerlIO *);
+#endif
+#ifndef PerlIO_error
+extern int PerlIO_error (PerlIO *);
+#endif
+#ifndef PerlIO_clearerr
+extern void PerlIO_clearerr (PerlIO *);
+#endif
+#ifndef PerlIO_getc
+extern int PerlIO_getc (PerlIO *);
+#endif
+#ifndef PerlIO_putc
+extern int PerlIO_putc (PerlIO *,int);
+#endif
+#ifndef PerlIO_flush
+extern int PerlIO_flush (PerlIO *);
+#endif
+#ifndef PerlIO_ungetc
+extern int PerlIO_ungetc (PerlIO *,int);
+#endif
+#ifndef PerlIO_fileno
+extern int PerlIO_fileno (PerlIO *);
+#endif
+#ifndef PerlIO_fdopen
+extern PerlIO * PerlIO_fdopen (int, const char *);
+#endif
+#ifndef PerlIO_importFILE
+extern PerlIO * PerlIO_importFILE (FILE *,int);
+#endif
+#ifndef PerlIO_exportFILE
+extern FILE * PerlIO_exportFILE (PerlIO *,int);
+#endif
+#ifndef PerlIO_findFILE
+extern FILE * PerlIO_findFILE (PerlIO *);
+#endif
+#ifndef PerlIO_releaseFILE
+extern void PerlIO_releaseFILE (PerlIO *,FILE *);
+#endif
+#ifndef PerlIO_read
+extern SSize_t PerlIO_read (PerlIO *,void *,Size_t);
+#endif
+#ifndef PerlIO_unread
+extern SSize_t PerlIO_unread (PerlIO *,const void *,Size_t);
+#endif
+#ifndef PerlIO_write
+extern SSize_t PerlIO_write (PerlIO *,const void *,Size_t);
+#endif
+#ifndef PerlIO_setlinebuf
+extern void PerlIO_setlinebuf (PerlIO *);
+#endif
+#ifndef PerlIO_printf
+extern int PerlIO_printf (PerlIO *, const char *,...)
+ __attribute__((__format__ (__printf__, 2, 3)));
+#endif
+#ifndef PerlIO_sprintf
+extern int PerlIO_sprintf (char *, int, const char *,...)
+ __attribute__((__format__ (__printf__, 3, 4)));
+#endif
+#ifndef PerlIO_vprintf
+extern int PerlIO_vprintf (PerlIO *, const char *, va_list);
+#endif
+#ifndef PerlIO_tell
+extern Off_t PerlIO_tell (PerlIO *);
+#endif
+#ifndef PerlIO_seek
+extern int PerlIO_seek (PerlIO *, Off_t, int);
+#endif
+#ifndef PerlIO_rewind
+extern void PerlIO_rewind (PerlIO *);
+#endif
+#ifndef PerlIO_has_base
+extern int PerlIO_has_base (PerlIO *);
+#endif
+#ifndef PerlIO_has_cntptr
+extern int PerlIO_has_cntptr (PerlIO *);
+#endif
+#ifndef PerlIO_fast_gets
+extern int PerlIO_fast_gets (PerlIO *);
+#endif
+#ifndef PerlIO_canset_cnt
+extern int PerlIO_canset_cnt (PerlIO *);
+#endif
+#ifndef PerlIO_get_ptr
+extern STDCHAR * PerlIO_get_ptr (PerlIO *);
+#endif
+#ifndef PerlIO_get_cnt
+extern int PerlIO_get_cnt (PerlIO *);
+#endif
+#ifndef PerlIO_set_cnt
+extern void PerlIO_set_cnt (PerlIO *,int);
+#endif
+#ifndef PerlIO_set_ptrcnt
+extern void PerlIO_set_ptrcnt (PerlIO *,STDCHAR *,int);
+#endif
+#ifndef PerlIO_get_base
+extern STDCHAR * PerlIO_get_base (PerlIO *);
+#endif
+#ifndef PerlIO_get_bufsiz
+extern int PerlIO_get_bufsiz (PerlIO *);
+#endif
+#ifndef PerlIO_tmpfile
+extern PerlIO * PerlIO_tmpfile (void);
+#endif
+#ifndef PerlIO_stdin
+extern PerlIO * PerlIO_stdin (void);
+#endif
+#ifndef PerlIO_stdout
+extern PerlIO * PerlIO_stdout (void);
+#endif
+#ifndef PerlIO_stderr
+extern PerlIO * PerlIO_stderr (void);
+#endif
+#ifndef PerlIO_getpos
+extern int PerlIO_getpos (PerlIO *,SV *);
+#endif
+#ifndef PerlIO_setpos
+extern int PerlIO_setpos (PerlIO *,SV *);
+#endif
+#ifndef PerlIO_fdupopen
+extern PerlIO * PerlIO_fdupopen (pTHX_ PerlIO *);
+#endif
+#if !defined(PerlIO_modestr) && !defined(PERLIO_IS_STDIO)
+extern char *PerlIO_modestr (PerlIO *,char *buf);
+#endif
+#ifndef PerlIO_isutf8
+extern int PerlIO_isutf8 (PerlIO *);
+#endif
+#ifndef PerlIO_apply_layers
+extern int PerlIO_apply_layers (pTHX_ PerlIO *f, const char *mode, const char *names);
+#endif
+#ifndef PerlIO_binmode
+extern int PerlIO_binmode (pTHX_ PerlIO *f, int iotype, int omode, const char *names);
+#endif
+#ifndef PerlIO_getname
+extern char * PerlIO_getname (PerlIO *, char *);
+#endif
+
+extern void PerlIO_destruct(pTHX);
+
+#ifndef PERLIO_IS_STDIO
+
+extern void PerlIO_cleanup(void);
+
+extern void PerlIO_debug(const char *fmt,...);
+
+#endif
+
+END_EXTERN_C
+
+#endif /* _PERLIO_H */
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