16 struct _PerlIO_funcs {
20 IV (*Pushed) (PerlIO *f, const char *mode, SV *arg);
21 IV (*Popped) (PerlIO *f);
22 PerlIO *(*Open) (pTHX_ PerlIO_funcs *tab,
23 PerlIO_list_t *layers, IV n,
25 int fd, int imode, int perm,
26 PerlIO *old, int narg, SV **args);
27 SV *(*Getarg) (PerlIO *f);
28 IV (*Fileno) (PerlIO *f);
29 /* Unix-like functions - cf sfio line disciplines */
30 SSize_t(*Read) (PerlIO *f, void *vbuf, Size_t count);
31 SSize_t(*Unread) (PerlIO *f, const void *vbuf, Size_t count);
32 SSize_t(*Write) (PerlIO *f, const void *vbuf, Size_t count);
33 IV (*Seek) (PerlIO *f, Off_t offset, int whence);
34 Off_t(*Tell) (PerlIO *f);
35 IV (*Close) (PerlIO *f);
36 /* Stdio-like buffered IO functions */
37 IV (*Flush) (PerlIO *f);
38 IV (*Fill) (PerlIO *f);
39 IV (*Eof) (PerlIO *f);
40 IV (*Error) (PerlIO *f);
41 void (*Clearerr) (PerlIO *f);
42 void (*Setlinebuf) (PerlIO *f);
43 /* Perl's snooping functions */
44 STDCHAR *(*Get_base) (PerlIO *f);
45 Size_t(*Get_bufsiz) (PerlIO *f);
46 STDCHAR *(*Get_ptr) (PerlIO *f);
47 SSize_t(*Get_cnt) (PerlIO *f);
48 void (*Set_ptrcnt) (PerlIO *f, STDCHAR * ptr, SSize_t cnt);
51 /*--------------------------------------------------------------------------------------*/
53 #define PERLIO_K_RAW 0x00000001
54 #define PERLIO_K_BUFFERED 0x00000002
55 #define PERLIO_K_CANCRLF 0x00000004
56 #define PERLIO_K_FASTGETS 0x00000008
57 #define PERLIO_K_DUMMY 0x00000010
58 #define PERLIO_K_UTF8 0x00008000
59 #define PERLIO_K_DESTRUCT 0x00010000
61 /*--------------------------------------------------------------------------------------*/
63 PerlIOl *next; /* Lower layer */
64 PerlIO_funcs *tab; /* Functions for this layer */
65 IV flags; /* Various flags for state */
68 /*--------------------------------------------------------------------------------------*/
71 #define PERLIO_F_EOF 0x00000100
72 #define PERLIO_F_CANWRITE 0x00000200
73 #define PERLIO_F_CANREAD 0x00000400
74 #define PERLIO_F_ERROR 0x00000800
75 #define PERLIO_F_TRUNCATE 0x00001000
76 #define PERLIO_F_APPEND 0x00002000
77 #define PERLIO_F_CRLF 0x00004000
78 #define PERLIO_F_UTF8 0x00008000
79 #define PERLIO_F_UNBUF 0x00010000
80 #define PERLIO_F_WRBUF 0x00020000
81 #define PERLIO_F_RDBUF 0x00040000
82 #define PERLIO_F_LINEBUF 0x00080000
83 #define PERLIO_F_TEMP 0x00100000
84 #define PERLIO_F_OPEN 0x00200000
85 #define PERLIO_F_FASTGETS 0x00400000
86 #define PERLIO_F_TTY 0x00800000
88 #define PerlIOBase(f) (*(f))
89 #define PerlIOSelf(f,type) ((type *)PerlIOBase(f))
90 #define PerlIONext(f) (&(PerlIOBase(f)->next))
92 /*--------------------------------------------------------------------------------------*/
93 /* Data exports - EXT rather than extern is needed for Cygwin */
94 EXT PerlIO_funcs PerlIO_unix;
95 EXT PerlIO_funcs PerlIO_perlio;
96 EXT PerlIO_funcs PerlIO_stdio;
97 EXT PerlIO_funcs PerlIO_crlf;
98 EXT PerlIO_funcs PerlIO_utf8;
99 EXT PerlIO_funcs PerlIO_byte;
100 EXT PerlIO_funcs PerlIO_raw;
101 EXT PerlIO_funcs PerlIO_pending;
103 EXT PerlIO_funcs PerlIO_mmap;
106 EXT PerlIO_funcs PerlIO_win32;
108 extern PerlIO *PerlIO_allocate(pTHX);
109 extern SV *PerlIO_arg_fetch(PerlIO_list_t *av, IV n);
110 #define PerlIOArg PerlIO_arg_fetch(layers,n)
112 #if O_BINARY != O_TEXT
113 #define PERLIO_STDTEXT "t"
115 #define PERLIO_STDTEXT ""
118 /*--------------------------------------------------------------------------------------*/
119 /* Generic, or stub layer functions */
121 extern IV PerlIOBase_fileno(PerlIO *f);
122 extern IV PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg);
123 extern IV PerlIOBase_popped(PerlIO *f);
124 extern SSize_t PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count);
125 extern SSize_t PerlIOBase_unread(PerlIO *f, const void *vbuf,
127 extern IV PerlIOBase_eof(PerlIO *f);
128 extern IV PerlIOBase_error(PerlIO *f);
129 extern void PerlIOBase_clearerr(PerlIO *f);
130 extern IV PerlIOBase_close(PerlIO *f);
131 extern void PerlIOBase_setlinebuf(PerlIO *f);
132 extern void PerlIOBase_flush_linebuf(void);
134 extern IV PerlIOBase_noop_ok(PerlIO *f);
135 extern IV PerlIOBase_noop_fail(PerlIO *f);
137 /*--------------------------------------------------------------------------------------*/
138 /* perlio buffer layer
139 As this is reasonably generic its struct and "methods" are declared here
140 so they can be used to "inherit" from it.
144 struct _PerlIO base; /* Base "class" info */
145 STDCHAR *buf; /* Start of buffer */
146 STDCHAR *end; /* End of valid part of buffer */
147 STDCHAR *ptr; /* Current position in buffer */
148 Off_t posn; /* Offset of buf into the file */
149 Size_t bufsiz; /* Real size of buffer */
150 IV oneword; /* Emergency buffer */
153 extern PerlIO *PerlIOBuf_open(pTHX_ PerlIO_funcs *self,
154 PerlIO_list_t *layers, IV n,
155 const char *mode, int fd, int imode,
156 int perm, PerlIO *old, int narg, SV **args);
157 extern IV PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg);
158 extern SSize_t PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count);
159 extern SSize_t PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count);
160 extern SSize_t PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count);
161 extern IV PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence);
162 extern Off_t PerlIOBuf_tell(PerlIO *f);
163 extern IV PerlIOBuf_close(PerlIO *f);
164 extern IV PerlIOBuf_flush(PerlIO *f);
165 extern IV PerlIOBuf_fill(PerlIO *f);
166 extern STDCHAR *PerlIOBuf_get_base(PerlIO *f);
167 extern Size_t PerlIOBuf_bufsiz(PerlIO *f);
168 extern STDCHAR *PerlIOBuf_get_ptr(PerlIO *f);
169 extern SSize_t PerlIOBuf_get_cnt(PerlIO *f);
170 extern void PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt);
172 extern int PerlIOUnix_oflags(const char *mode);
174 /*--------------------------------------------------------------------------------------*/
176 #endif /* _PERLIOL_H */