PerlIO #include and #ifdef re-work.

p4raw-id: //depot/perlio@7684

1 files changed, 308 insertions, 1 deletions

diff --git a/perlio.h b/perlio.h
index e699a3eafe..d8ea15a8a0 100644
--- a/perlio.h
+++ b/perlio.h
@@ -1 +1,308 @@
-#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
+# define USE_PERLIO
+#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
+
+#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
+
+extern void	PerlIO_define_layer	(PerlIO_funcs *tab);
+extern PerlIO *	PerlIO_push		(PerlIO *f,PerlIO_funcs *tab,const char *mode);
+extern void	PerlIO_pop		(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
+#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 */
+
+/* ----------- 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 --------------- */
+
+#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_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_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 *,Fpos_t *);
+#endif
+#ifndef PerlIO_setpos
+extern int	PerlIO_setpos		(PerlIO *,const Fpos_t *);
+#endif
+#ifndef PerlIO_fdupopen
+extern PerlIO *	PerlIO_fdupopen		(PerlIO *);
+#endif
+#ifndef PerlIO_isutf8
+extern int	PerlIO_isutf8		(PerlIO *);
+#endif
+
+#endif /* _PERLIO_H */