3 * Copyright (c) 1997-2002, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
13 Interface for perl to IO functions.
14 There is a hierachy of Configure determined #define controls:
15 USE_STDIO - forces PerlIO_xxx() to be #define-d onto stdio functions.
16 This is used for x2p subdirectory and for conservative
17 builds - "just like perl5.00X used to be".
18 This dominates over the others.
20 USE_PERLIO - The primary Configure variable that enables PerlIO.
21 If USE_PERLIO is _NOT_ set
22 then USE_STDIO above will be set to be conservative.
24 then there are two modes determined by USE_SFIO:
26 USE_SFIO - If set causes PerlIO_xxx() to be #define-d onto sfio functions.
27 A backward compatability mode for some specialist applications.
29 If USE_SFIO is not set then PerlIO_xxx() are real functions
30 defined in perlio.c which implement extra functionality
31 required for utf8 support.
33 One further note - the table-of-functions scheme controlled
34 by PERL_IMPLICIT_SYS turns on USE_PERLIO so that iperlsys.h can
35 #define PerlIO_xxx() to go via the function table, without having
36 to #undef them from (say) stdio forms.
40 #if defined(PERL_IMPLICIT_SYS)
43 /* # define USE_PERLIO */
53 # ifndef PERLIO_IS_STDIO
54 # define PERLIO_IS_STDIO
58 /* -------------------- End of Configure controls ---------------------------- */
61 * Although we may not want stdio to be used including <stdio.h> here
62 * avoids issues where stdio.h has strange side effects
67 int fseeko(FILE *stream, off_t offset, int whence);
68 off_t ftello(FILE *stream);
71 #if defined(USE_64_BIT_STDIO) && defined(HAS_FTELLO) && !defined(USE_FTELL64)
75 #if defined(USE_64_BIT_STDIO) && defined(HAS_FSEEKO) && !defined(USE_FSEEK64)
79 /* BS2000 includes are sometimes a bit non standard :-( */
80 #if defined(POSIX_BC) && defined(O_BINARY) && !defined(O_TEXT)
84 #ifdef PERLIO_IS_STDIO
85 /* #define PerlIO_xxxx() as equivalent stdio function */
87 #else /* PERLIO_IS_STDIO */
89 /* #define PerlIO_xxxx() as equivalent sfio function */
92 #endif /* PERLIO_IS_STDIO */
95 /* ----------- PerlIO implementation ---------- */
96 /* PerlIO not #define-d to something else - define the implementation */
98 typedef struct _PerlIO PerlIOl;
99 typedef struct _PerlIO_funcs PerlIO_funcs;
100 typedef PerlIOl *PerlIO;
101 #define PerlIO PerlIO
102 #define PERLIO_LAYERS 1
104 extern void PerlIO_define_layer(pTHX_ PerlIO_funcs *tab);
105 extern PerlIO_funcs *PerlIO_find_layer(pTHX_ const char *name, STRLEN len,
107 extern PerlIO *PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab,
108 const char *mode, SV *arg);
109 extern void PerlIO_pop(pTHX_ PerlIO *f);
110 extern void PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param);
114 /* ----------- End of implementation choices ---------- */
116 #ifndef PERLIO_IS_STDIO
117 /* Not using stdio _directly_ as PerlIO */
119 /* We now need to determine what happens if source trys to use stdio.
120 * There are three cases based on PERLIO_NOT_STDIO which XS code
121 * can set how it wants.
125 /* Make a choice for perl core code
126 - currently this is set to try and catch lingering raw stdio calls.
127 This is a known issue with some non UNIX ports which still use
128 "native" stdio features.
130 #ifndef PERLIO_NOT_STDIO
131 #define PERLIO_NOT_STDIO 1
134 #ifndef PERLIO_NOT_STDIO
135 #define PERLIO_NOT_STDIO 0
139 #ifdef PERLIO_NOT_STDIO
142 * PERLIO_NOT_STDIO #define'd as 1
143 * Case 1: Strong denial of stdio - make all stdio calls (we can think of) errors
146 #else /* if PERLIO_NOT_STDIO */
148 * PERLIO_NOT_STDIO #define'd as 0
149 * Case 2: Declares that both PerlIO and stdio can be used
151 #endif /* if PERLIO_NOT_STDIO */
152 #else /* ifdef PERLIO_NOT_STDIO */
154 * PERLIO_NOT_STDIO not defined
155 * Case 3: Try and fake stdio calls as PerlIO calls
157 #include "fakesdio.h"
158 #endif /* ifndef PERLIO_NOT_STDIO */
159 #endif /* PERLIO_IS_STDIO */
161 #define specialCopIO(sv) ((sv) == Nullsv)
163 /* ----------- fill in things that have not got #define'd ---------- */
173 /* This is to catch case with no stdio */
190 #define PERLIO_DUP_CLONE 1
191 #define PERLIO_DUP_FD 2
193 /* --------------------- Now prototypes for functions --------------- */
196 #ifndef NEXT30_NO_ATTRIBUTE
197 #ifndef HASATTRIBUTE /* disable GNU-cc attribute checking? */
198 #ifdef __attribute__ /* Avoid possible redefinition errors */
201 #define __attribute__(attr)
205 extern void PerlIO_init(pTHX);
207 #ifndef PerlIO_stdoutf
208 extern int PerlIO_stdoutf(const char *, ...)
209 __attribute__ ((__format__(__printf__, 1, 2)));
212 extern int PerlIO_puts(PerlIO *, const char *);
215 extern PerlIO *PerlIO_open(const char *, const char *);
218 extern PerlIO *PerlIO_openn(pTHX_ const char *layers, const char *mode,
219 int fd, int imode, int perm, PerlIO *old,
223 extern int PerlIO_eof(PerlIO *);
226 extern int PerlIO_error(PerlIO *);
228 #ifndef PerlIO_clearerr
229 extern void PerlIO_clearerr(PerlIO *);
232 extern int PerlIO_getc(PerlIO *);
235 extern int PerlIO_putc(PerlIO *, int);
237 #ifndef PerlIO_ungetc
238 extern int PerlIO_ungetc(PerlIO *, int);
240 #ifndef PerlIO_fdopen
241 extern PerlIO *PerlIO_fdopen(int, const char *);
243 #ifndef PerlIO_importFILE
244 extern PerlIO *PerlIO_importFILE(FILE *, int);
246 #ifndef PerlIO_exportFILE
247 extern FILE *PerlIO_exportFILE(PerlIO *, int);
249 #ifndef PerlIO_findFILE
250 extern FILE *PerlIO_findFILE(PerlIO *);
252 #ifndef PerlIO_releaseFILE
253 extern void PerlIO_releaseFILE(PerlIO *, FILE *);
256 extern SSize_t PerlIO_read(PerlIO *, void *, Size_t);
258 #ifndef PerlIO_unread
259 extern SSize_t PerlIO_unread(PerlIO *, const void *, Size_t);
262 extern SSize_t PerlIO_write(PerlIO *, const void *, Size_t);
264 #ifndef PerlIO_setlinebuf
265 extern void PerlIO_setlinebuf(PerlIO *);
267 #ifndef PerlIO_printf
268 extern int PerlIO_printf(PerlIO *, const char *, ...)
269 __attribute__ ((__format__(__printf__, 2, 3)));
271 #ifndef PerlIO_sprintf
272 extern int PerlIO_sprintf(char *, int, const char *, ...)
273 __attribute__ ((__format__(__printf__, 3, 4)));
275 #ifndef PerlIO_vprintf
276 extern int PerlIO_vprintf(PerlIO *, const char *, va_list);
279 extern Off_t PerlIO_tell(PerlIO *);
282 extern int PerlIO_seek(PerlIO *, Off_t, int);
284 #ifndef PerlIO_rewind
285 extern void PerlIO_rewind(PerlIO *);
287 #ifndef PerlIO_has_base
288 extern int PerlIO_has_base(PerlIO *);
290 #ifndef PerlIO_has_cntptr
291 extern int PerlIO_has_cntptr(PerlIO *);
293 #ifndef PerlIO_fast_gets
294 extern int PerlIO_fast_gets(PerlIO *);
296 #ifndef PerlIO_canset_cnt
297 extern int PerlIO_canset_cnt(PerlIO *);
299 #ifndef PerlIO_get_ptr
300 extern STDCHAR *PerlIO_get_ptr(PerlIO *);
302 #ifndef PerlIO_get_cnt
303 extern int PerlIO_get_cnt(PerlIO *);
305 #ifndef PerlIO_set_cnt
306 extern void PerlIO_set_cnt(PerlIO *, int);
308 #ifndef PerlIO_set_ptrcnt
309 extern void PerlIO_set_ptrcnt(PerlIO *, STDCHAR *, int);
311 #ifndef PerlIO_get_base
312 extern STDCHAR *PerlIO_get_base(PerlIO *);
314 #ifndef PerlIO_get_bufsiz
315 extern int PerlIO_get_bufsiz(PerlIO *);
317 #ifndef PerlIO_tmpfile
318 extern PerlIO *PerlIO_tmpfile(void);
321 extern PerlIO *PerlIO_stdin(void);
323 #ifndef PerlIO_stdout
324 extern PerlIO *PerlIO_stdout(void);
326 #ifndef PerlIO_stderr
327 extern PerlIO *PerlIO_stderr(void);
329 #ifndef PerlIO_getpos
330 extern int PerlIO_getpos(PerlIO *, SV *);
332 #ifndef PerlIO_setpos
333 extern int PerlIO_setpos(PerlIO *, SV *);
335 #ifndef PerlIO_fdupopen
336 extern PerlIO *PerlIO_fdupopen(pTHX_ PerlIO *, CLONE_PARAMS *, int);
338 #if !defined(PerlIO_modestr) && !defined(PERLIO_IS_STDIO)
339 extern char *PerlIO_modestr(PerlIO *, char *buf);
341 #ifndef PerlIO_isutf8
342 extern int PerlIO_isutf8(PerlIO *);
344 #ifndef PerlIO_apply_layers
345 extern int PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode,
348 #ifndef PerlIO_binmode
349 extern int PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int omode,
352 #ifndef PerlIO_getname
353 extern char *PerlIO_getname(PerlIO *, char *);
356 extern void PerlIO_destruct(pTHX);
358 extern int PerlIO_intmode2str(int rawmode, char *mode, int *writing);
361 extern void PerlIO_cleanup(pTHX);
363 extern void PerlIO_debug(const char *fmt, ...);
364 typedef struct PerlIO_list_s PerlIO_list_t;
370 #endif /* _PERLIO_H */