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[perl5.git] / perliol.h
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NIS
1#ifndef _PERLIOL_H
2#define _PERLIOL_H
3
4struct _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);
33af2bc7 13 IV (*Pushed)(PerlIO *f,const char *mode,const char *arg,STRLEN len);
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NIS
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
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37/*--------------------------------------------------------------------------------------*/
38/* Kind values */
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39#define PERLIO_K_RAW 0x00000001
40#define PERLIO_K_BUFFERED 0x00000002
f5b9d040 41#define PERLIO_K_CANCRLF 0x00000004
5e2ab84b 42#define PERLIO_K_FASTGETS 0x00000008
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43
44/*--------------------------------------------------------------------------------------*/
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45struct _PerlIO
46{
47 PerlIOl * next; /* Lower layer */
48 PerlIO_funcs * tab; /* Functions for this layer */
49 IV flags; /* Various flags for state */
50};
51
52/*--------------------------------------------------------------------------------------*/
53
54/* Flag values */
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55#define PERLIO_F_EOF 0x00000100
56#define PERLIO_F_CANWRITE 0x00000200
57#define PERLIO_F_CANREAD 0x00000400
58#define PERLIO_F_ERROR 0x00000800
59#define PERLIO_F_TRUNCATE 0x00001000
60#define PERLIO_F_APPEND 0x00002000
61#define PERLIO_F_CRLF 0x00004000
62#define PERLIO_F_UTF8 0x00008000
63#define PERLIO_F_UNBUF 0x00010000
64#define PERLIO_F_WRBUF 0x00020000
65#define PERLIO_F_RDBUF 0x00040000
66#define PERLIO_F_LINEBUF 0x00080000
67#define PERLIO_F_TEMP 0x00100000
68#define PERLIO_F_OPEN 0x00200000
69#define PERLIO_F_FASTGETS 0x00400000
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70
71#define PerlIOBase(f) (*(f))
72#define PerlIOSelf(f,type) ((type *)PerlIOBase(f))
73#define PerlIONext(f) (&(PerlIOBase(f)->next))
74
75/*--------------------------------------------------------------------------------------*/
76
77extern PerlIO_funcs PerlIO_unix;
78extern PerlIO_funcs PerlIO_perlio;
79extern PerlIO_funcs PerlIO_stdio;
66ecd56b 80extern PerlIO_funcs PerlIO_crlf;
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81/* The EXT is need for Cygwin -- but why only for _pending? --jhi */
82EXT PerlIO_funcs PerlIO_pending;
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83#ifdef HAS_MMAP
84extern PerlIO_funcs PerlIO_mmap;
85#endif
86
5f1a76d0 87extern PerlIO *PerlIO_allocate(pTHX);
76ced9ad 88
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89#if O_BINARY != O_TEXT
90#define PERLIO_STDTEXT "t"
91#else
92#define PERLIO_STDTEXT ""
93#endif
94
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95/*--------------------------------------------------------------------------------------*/
96/* Generic, or stub layer functions */
97
98extern IV PerlIOBase_fileno (PerlIO *f);
33af2bc7 99extern IV PerlIOBase_pushed (PerlIO *f, const char *mode,const char *arg,STRLEN len);
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100extern IV PerlIOBase_popped (PerlIO *f);
101extern SSize_t PerlIOBase_unread (PerlIO *f, const void *vbuf, Size_t count);
102extern IV PerlIOBase_eof (PerlIO *f);
103extern IV PerlIOBase_error (PerlIO *f);
104extern void PerlIOBase_clearerr (PerlIO *f);
105extern IV PerlIOBase_flush (PerlIO *f);
106extern IV PerlIOBase_fill (PerlIO *f);
107extern IV PerlIOBase_close (PerlIO *f);
108extern void PerlIOBase_setlinebuf(PerlIO *f);
109
110extern IV PerlIOBase_noop_ok (PerlIO *f);
111extern IV PerlIOBase_noop_fail (PerlIO *f);
112
113/*--------------------------------------------------------------------------------------*/
114/* perlio buffer layer
115 As this is reasonably generic its struct and "methods" are declared here
116 so they can be used to "inherit" from it.
117*/
118
119typedef struct
120{
121 struct _PerlIO base; /* Base "class" info */
122 STDCHAR * buf; /* Start of buffer */
123 STDCHAR * end; /* End of valid part of buffer */
124 STDCHAR * ptr; /* Current position in buffer */
125 Off_t posn; /* Offset of buf into the file */
126 Size_t bufsiz; /* Real size of buffer */
127 IV oneword; /* Emergency buffer */
128} PerlIOBuf;
129
130extern PerlIO * PerlIOBuf_fdopen (PerlIO_funcs *self, int fd, const char *mode);
131extern PerlIO * PerlIOBuf_open (PerlIO_funcs *self, const char *path, const char *mode);
132extern int PerlIOBuf_reopen (const char *path, const char *mode, PerlIO *f);
133extern SSize_t PerlIOBuf_read (PerlIO *f, void *vbuf, Size_t count);
134extern SSize_t PerlIOBuf_unread (PerlIO *f, const void *vbuf, Size_t count);
135extern SSize_t PerlIOBuf_write (PerlIO *f, const void *vbuf, Size_t count);
136extern IV PerlIOBuf_seek (PerlIO *f, Off_t offset, int whence);
137extern Off_t PerlIOBuf_tell (PerlIO *f);
138extern IV PerlIOBuf_close (PerlIO *f);
139extern IV PerlIOBuf_flush (PerlIO *f);
140extern IV PerlIOBuf_fill (PerlIO *f);
141extern void PerlIOBuf_setlinebuf (PerlIO *f);
142extern STDCHAR *PerlIOBuf_get_base (PerlIO *f);
143extern Size_t PerlIOBuf_bufsiz (PerlIO *f);
144extern STDCHAR *PerlIOBuf_get_ptr (PerlIO *f);
145extern SSize_t PerlIOBuf_get_cnt (PerlIO *f);
146extern void PerlIOBuf_set_ptrcnt (PerlIO *f, STDCHAR *ptr, SSize_t cnt);
147
148/*--------------------------------------------------------------------------------------*/
149
150#endif /* _PERLIOL_H */