[perl5.git] / perliol.h

#ifndef _PERLIOL_H
#define _PERLIOL_H

struct _PerlIO_funcs
{
 char *		name;
 Size_t		size;
 IV		kind;
 IV		(*Fileno)(PerlIO *f);
 PerlIO *	(*Fdopen)(PerlIO_funcs *tab, int fd, const char *mode);
 PerlIO *	(*Open)(PerlIO_funcs *tab, const char *path, const char *mode);
 int		(*Reopen)(const char *path, const char *mode, PerlIO *f);
 IV		(*Pushed)(PerlIO *f,const char *mode);
 IV		(*Popped)(PerlIO *f);
 /* Unix-like functions - cf sfio line disciplines */
 SSize_t	(*Read)(PerlIO *f, void *vbuf, Size_t count);
 SSize_t	(*Unread)(PerlIO *f, const void *vbuf, Size_t count);
 SSize_t	(*Write)(PerlIO *f, const void *vbuf, Size_t count);
 IV		(*Seek)(PerlIO *f, Off_t offset, int whence);
 Off_t		(*Tell)(PerlIO *f);
 IV		(*Close)(PerlIO *f);
 /* Stdio-like buffered IO functions */
 IV		(*Flush)(PerlIO *f);
 IV		(*Fill)(PerlIO *f);
 IV		(*Eof)(PerlIO *f);
 IV		(*Error)(PerlIO *f);
 void		(*Clearerr)(PerlIO *f);
 void		(*Setlinebuf)(PerlIO *f);
 /* Perl's snooping functions */
 STDCHAR *	(*Get_base)(PerlIO *f);
 Size_t		(*Get_bufsiz)(PerlIO *f);
 STDCHAR *	(*Get_ptr)(PerlIO *f);
 SSize_t	(*Get_cnt)(PerlIO *f);
 void		(*Set_ptrcnt)(PerlIO *f,STDCHAR *ptr,SSize_t cnt);
};

struct _PerlIO
{
 PerlIOl *	next;       /* Lower layer */
 PerlIO_funcs *	tab;        /* Functions for this layer */
 IV		flags;      /* Various flags for state */
};

/*--------------------------------------------------------------------------------------*/

/* Flag values */
#define PERLIO_F_EOF		0x00010000
#define PERLIO_F_CANWRITE	0x00020000
#define PERLIO_F_CANREAD	0x00040000
#define PERLIO_F_ERROR		0x00080000
#define PERLIO_F_TRUNCATE	0x00100000
#define PERLIO_F_APPEND		0x00200000
#define PERLIO_F_BINARY		0x00400000
#define PERLIO_F_UTF8		0x00800000
#define PERLIO_F_LINEBUF	0x01000000
#define PERLIO_F_WRBUF		0x02000000
#define PERLIO_F_RDBUF		0x04000000
#define PERLIO_F_TEMP		0x08000000
#define PERLIO_F_OPEN		0x10000000

#define PerlIOBase(f)      (*(f))
#define PerlIOSelf(f,type) ((type *)PerlIOBase(f))
#define PerlIONext(f)      (&(PerlIOBase(f)->next))

/*--------------------------------------------------------------------------------------*/

extern PerlIO_funcs PerlIO_unix;
extern PerlIO_funcs PerlIO_perlio;
extern PerlIO_funcs PerlIO_stdio;
extern PerlIO_funcs PerlIO_crlf;
#ifdef HAS_MMAP
extern PerlIO_funcs PerlIO_mmap;
#endif

extern PerlIO *PerlIO_allocate(void);

/*--------------------------------------------------------------------------------------*/
/* Generic, or stub layer functions */

extern IV	PerlIOBase_fileno    (PerlIO *f);
extern IV	PerlIOBase_pushed    (PerlIO *f, const char *mode);
extern IV	PerlIOBase_popped    (PerlIO *f);
extern SSize_t	PerlIOBase_unread    (PerlIO *f, const void *vbuf, Size_t count);
extern IV	PerlIOBase_eof       (PerlIO *f);
extern IV	PerlIOBase_error     (PerlIO *f);
extern void	PerlIOBase_clearerr  (PerlIO *f);
extern IV	PerlIOBase_flush     (PerlIO *f);
extern IV	PerlIOBase_fill      (PerlIO *f);
extern IV	PerlIOBase_close     (PerlIO *f);
extern void	PerlIOBase_setlinebuf(PerlIO *f);

extern IV	PerlIOBase_noop_ok   (PerlIO *f);
extern IV	PerlIOBase_noop_fail (PerlIO *f);

/*--------------------------------------------------------------------------------------*/
/* perlio buffer layer
   As this is reasonably generic its struct and "methods" are declared here
   so they can be used to "inherit" from it.
*/

typedef struct
{
 struct _PerlIO base;       /* Base "class" info */
 STDCHAR *	buf;        /* Start of buffer */
 STDCHAR *	end;        /* End of valid part of buffer */
 STDCHAR *	ptr;        /* Current position in buffer */
 Off_t		posn;       /* Offset of buf into the file */
 Size_t		bufsiz;     /* Real size of buffer */
 IV		oneword;    /* Emergency buffer */
} PerlIOBuf;

extern PerlIO *	PerlIOBuf_fdopen     (PerlIO_funcs *self, int fd, const char *mode);
extern PerlIO *	PerlIOBuf_open       (PerlIO_funcs *self, const char *path, const char *mode);
extern int	PerlIOBuf_reopen     (const char *path, const char *mode, PerlIO *f);
extern SSize_t	PerlIOBuf_read       (PerlIO *f, void *vbuf, Size_t count);
extern SSize_t	PerlIOBuf_unread     (PerlIO *f, const void *vbuf, Size_t count);
extern SSize_t	PerlIOBuf_write      (PerlIO *f, const void *vbuf, Size_t count);
extern IV	PerlIOBuf_seek       (PerlIO *f, Off_t offset, int whence);
extern Off_t	PerlIOBuf_tell       (PerlIO *f);
extern IV	PerlIOBuf_close      (PerlIO *f);
extern IV	PerlIOBuf_flush      (PerlIO *f);
extern IV	PerlIOBuf_fill       (PerlIO *f);
extern void	PerlIOBuf_setlinebuf (PerlIO *f);
extern STDCHAR *PerlIOBuf_get_base   (PerlIO *f);
extern Size_t	PerlIOBuf_bufsiz     (PerlIO *f);
extern STDCHAR *PerlIOBuf_get_ptr    (PerlIO *f);
extern SSize_t	PerlIOBuf_get_cnt    (PerlIO *f);
extern void	PerlIOBuf_set_ptrcnt (PerlIO *f, STDCHAR *ptr, SSize_t cnt);

/*--------------------------------------------------------------------------------------*/

#endif /* _PERLIOL_H */
Commit	Line	Data
76ced9ad NIS	1	#ifndef _PERLIOL_H
	2	#define _PERLIOL_H
	3
	4	struct _PerlIO_funcs
	5	{
	6	char * name;
	7	Size_t size;
	8	IV kind;
	9	IV (Fileno)(PerlIO f);
	10	PerlIO * (Fdopen)(PerlIO_funcs tab, int fd, const char *mode);
	11	PerlIO * (Open)(PerlIO_funcs tab, const char path, const char mode);
	12	int (Reopen)(const char path, const char mode, PerlIO f);
	13	IV (Pushed)(PerlIO f,const char *mode);
	14	IV (Popped)(PerlIO f);
	15	/* Unix-like functions - cf sfio line disciplines */
	16	SSize_t (Read)(PerlIO f, void *vbuf, Size_t count);
	17	SSize_t (Unread)(PerlIO f, const void *vbuf, Size_t count);
	18	SSize_t (Write)(PerlIO f, const void *vbuf, Size_t count);
	19	IV (Seek)(PerlIO f, Off_t offset, int whence);
	20	Off_t (Tell)(PerlIO f);
	21	IV (Close)(PerlIO f);
	22	/* Stdio-like buffered IO functions */
	23	IV (Flush)(PerlIO f);
	24	IV (Fill)(PerlIO f);
	25	IV (Eof)(PerlIO f);
	26	IV (Error)(PerlIO f);
	27	void (Clearerr)(PerlIO f);
	28	void (Setlinebuf)(PerlIO f);
	29	/* Perl's snooping functions */
	30	STDCHAR * (Get_base)(PerlIO f);
	31	Size_t (Get_bufsiz)(PerlIO f);
	32	STDCHAR * (Get_ptr)(PerlIO f);
	33	SSize_t (Get_cnt)(PerlIO f);
	34	void (Set_ptrcnt)(PerlIO f,STDCHAR *ptr,SSize_t cnt);
	35	};
	36
	37	struct _PerlIO
	38	{
	39	PerlIOl * next; /* Lower layer */
	40	PerlIO_funcs * tab; /* Functions for this layer */
	41	IV flags; /* Various flags for state */
	42	};
	43
	44	/--------------------------------------------------------------------------------------/
	45
	46	/* Flag values */
	47	#define PERLIO_F_EOF 0x00010000
	48	#define PERLIO_F_CANWRITE 0x00020000
	49	#define PERLIO_F_CANREAD 0x00040000
	50	#define PERLIO_F_ERROR 0x00080000
	51	#define PERLIO_F_TRUNCATE 0x00100000
	52	#define PERLIO_F_APPEND 0x00200000
	53	#define PERLIO_F_BINARY 0x00400000
	54	#define PERLIO_F_UTF8 0x00800000
	55	#define PERLIO_F_LINEBUF 0x01000000
	56	#define PERLIO_F_WRBUF 0x02000000
	57	#define PERLIO_F_RDBUF 0x04000000
	58	#define PERLIO_F_TEMP 0x08000000
	59	#define PERLIO_F_OPEN 0x10000000
	60
	61	#define PerlIOBase(f) (*(f))
	62	#define PerlIOSelf(f,type) ((type *)PerlIOBase(f))
	63	#define PerlIONext(f) (&(PerlIOBase(f)->next))
	64
65	/--------------------------------------------------------------------------------------/
66
67	extern PerlIO_funcs PerlIO_unix;
68	extern PerlIO_funcs PerlIO_perlio;
69	extern PerlIO_funcs PerlIO_stdio;
66ecd56b	70	extern PerlIO_funcs PerlIO_crlf;
76ced9ad NIS	71	#ifdef HAS_MMAP
	72	extern PerlIO_funcs PerlIO_mmap;
	73	#endif
	74
	75	extern PerlIO *PerlIO_allocate(void);
	76
	77	/--------------------------------------------------------------------------------------/
	78	/* Generic, or stub layer functions */
	79
	80	extern IV PerlIOBase_fileno (PerlIO *f);
	81	extern IV PerlIOBase_pushed (PerlIO f, const char mode);
	82	extern IV PerlIOBase_popped (PerlIO *f);
	83	extern SSize_t PerlIOBase_unread (PerlIO f, const void vbuf, Size_t count);
	84	extern IV PerlIOBase_eof (PerlIO *f);
	85	extern IV PerlIOBase_error (PerlIO *f);
	86	extern void PerlIOBase_clearerr (PerlIO *f);
	87	extern IV PerlIOBase_flush (PerlIO *f);
	88	extern IV PerlIOBase_fill (PerlIO *f);
	89	extern IV PerlIOBase_close (PerlIO *f);
	90	extern void PerlIOBase_setlinebuf(PerlIO *f);
	91
	92	extern IV PerlIOBase_noop_ok (PerlIO *f);
	93	extern IV PerlIOBase_noop_fail (PerlIO *f);
	94
	95	/--------------------------------------------------------------------------------------/
	96	/* perlio buffer layer
	97	As this is reasonably generic its struct and "methods" are declared here
	98	so they can be used to "inherit" from it.
	99	*/
	100
	101	typedef struct
	102	{
	103	struct _PerlIO base; /* Base "class" info */
	104	STDCHAR * buf; /* Start of buffer */
	105	STDCHAR * end; /* End of valid part of buffer */
	106	STDCHAR * ptr; /* Current position in buffer */
	107	Off_t posn; /* Offset of buf into the file */
	108	Size_t bufsiz; /* Real size of buffer */
	109	IV oneword; /* Emergency buffer */
	110	} PerlIOBuf;
	111
	112	extern PerlIO * PerlIOBuf_fdopen (PerlIO_funcs self, int fd, const char mode);
	113	extern PerlIO * PerlIOBuf_open (PerlIO_funcs self, const char path, const char *mode);
	114	extern int PerlIOBuf_reopen (const char path, const char mode, PerlIO *f);
	115	extern SSize_t PerlIOBuf_read (PerlIO f, void vbuf, Size_t count);
	116	extern SSize_t PerlIOBuf_unread (PerlIO f, const void vbuf, Size_t count);
	117	extern SSize_t PerlIOBuf_write (PerlIO f, const void vbuf, Size_t count);
	118	extern IV PerlIOBuf_seek (PerlIO *f, Off_t offset, int whence);
	119	extern Off_t PerlIOBuf_tell (PerlIO *f);
	120	extern IV PerlIOBuf_close (PerlIO *f);
	121	extern IV PerlIOBuf_flush (PerlIO *f);
	122	extern IV PerlIOBuf_fill (PerlIO *f);
	123	extern void PerlIOBuf_setlinebuf (PerlIO *f);
	124	extern STDCHAR PerlIOBuf_get_base (PerlIO f);
	125	extern Size_t PerlIOBuf_bufsiz (PerlIO *f);
	126	extern STDCHAR PerlIOBuf_get_ptr (PerlIO f);
	127	extern SSize_t PerlIOBuf_get_cnt (PerlIO *f);
	128	extern void PerlIOBuf_set_ptrcnt (PerlIO f, STDCHAR ptr, SSize_t cnt);
	129
	130	/--------------------------------------------------------------------------------------/
	131
	132	#endif /* _PERLIOL_H */