3 * Copyright (c) 1997-2003, 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 AV* PerlIO_get_layers(pTHX_ PerlIO *f);
111 extern void PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param);
115 /* ----------- End of implementation choices ---------- */
117 #ifndef PERLIO_IS_STDIO
118 /* Not using stdio _directly_ as PerlIO */
120 /* We now need to determine what happens if source trys to use stdio.
121 * There are three cases based on PERLIO_NOT_STDIO which XS code
122 * can set how it wants.
126 /* Make a choice for perl core code
127 - currently this is set to try and catch lingering raw stdio calls.
128 This is a known issue with some non UNIX ports which still use
129 "native" stdio features.
131 #ifndef PERLIO_NOT_STDIO
132 #define PERLIO_NOT_STDIO 1
135 #ifndef PERLIO_NOT_STDIO
136 #define PERLIO_NOT_STDIO 0
140 #ifdef PERLIO_NOT_STDIO
143 * PERLIO_NOT_STDIO #define'd as 1
144 * Case 1: Strong denial of stdio - make all stdio calls (we can think of) errors
147 #else /* if PERLIO_NOT_STDIO */
149 * PERLIO_NOT_STDIO #define'd as 0
150 * Case 2: Declares that both PerlIO and stdio can be used
152 #endif /* if PERLIO_NOT_STDIO */
153 #else /* ifdef PERLIO_NOT_STDIO */
155 * PERLIO_NOT_STDIO not defined
156 * Case 3: Try and fake stdio calls as PerlIO calls
158 #include "fakesdio.h"
159 #endif /* ifndef PERLIO_NOT_STDIO */
160 #endif /* PERLIO_IS_STDIO */
162 #define specialCopIO(sv) ((sv) == Nullsv)
164 /* ----------- fill in things that have not got #define'd ---------- */
174 /* This is to catch case with no stdio */
191 #define PERLIO_DUP_CLONE 1
192 #define PERLIO_DUP_FD 2
194 /* --------------------- Now prototypes for functions --------------- */
197 #ifndef NEXT30_NO_ATTRIBUTE
198 #ifndef HASATTRIBUTE /* disable GNU-cc attribute checking? */
199 #ifdef __attribute__ /* Avoid possible redefinition errors */
202 #define __attribute__(attr)
206 extern void PerlIO_init(pTHX);
208 #ifndef PerlIO_stdoutf
209 extern int PerlIO_stdoutf(const char *, ...)
211 __attribute__ ((__format__(__printf__, 1, 2)))
216 extern int PerlIO_puts(PerlIO *, const char *);
219 extern PerlIO *PerlIO_open(const char *, const char *);
222 extern PerlIO *PerlIO_openn(pTHX_ const char *layers, const char *mode,
223 int fd, int imode, int perm, PerlIO *old,
227 extern int PerlIO_eof(PerlIO *);
230 extern int PerlIO_error(PerlIO *);
232 #ifndef PerlIO_clearerr
233 extern void PerlIO_clearerr(PerlIO *);
236 extern int PerlIO_getc(PerlIO *);
239 extern int PerlIO_putc(PerlIO *, int);
241 #ifndef PerlIO_ungetc
242 extern int PerlIO_ungetc(PerlIO *, int);
244 #ifndef PerlIO_fdopen
245 extern PerlIO *PerlIO_fdopen(int, const char *);
247 #ifndef PerlIO_importFILE
248 extern PerlIO *PerlIO_importFILE(FILE *, const char *);
250 #ifndef PerlIO_exportFILE
251 extern FILE *PerlIO_exportFILE(PerlIO *, const char *);
253 #ifndef PerlIO_findFILE
254 extern FILE *PerlIO_findFILE(PerlIO *);
256 #ifndef PerlIO_releaseFILE
257 extern void PerlIO_releaseFILE(PerlIO *, FILE *);
260 extern SSize_t PerlIO_read(PerlIO *, void *, Size_t);
262 #ifndef PerlIO_unread
263 extern SSize_t PerlIO_unread(PerlIO *, const void *, Size_t);
266 extern SSize_t PerlIO_write(PerlIO *, const void *, Size_t);
268 #ifndef PerlIO_setlinebuf
269 extern void PerlIO_setlinebuf(PerlIO *);
271 #ifndef PerlIO_printf
272 extern int PerlIO_printf(PerlIO *, const char *, ...)
274 __attribute__ ((__format__(__printf__, 2, 3)))
278 #ifndef PerlIO_sprintf
279 extern int PerlIO_sprintf(char *, int, const char *, ...)
281 __attribute__ ((__format__(__printf__, 3, 4)))
285 #ifndef PerlIO_vprintf
286 extern int PerlIO_vprintf(PerlIO *, const char *, va_list);
289 extern Off_t PerlIO_tell(PerlIO *);
292 extern int PerlIO_seek(PerlIO *, Off_t, int);
294 #ifndef PerlIO_rewind
295 extern void PerlIO_rewind(PerlIO *);
297 #ifndef PerlIO_has_base
298 extern int PerlIO_has_base(PerlIO *);
300 #ifndef PerlIO_has_cntptr
301 extern int PerlIO_has_cntptr(PerlIO *);
303 #ifndef PerlIO_fast_gets
304 extern int PerlIO_fast_gets(PerlIO *);
306 #ifndef PerlIO_canset_cnt
307 extern int PerlIO_canset_cnt(PerlIO *);
309 #ifndef PerlIO_get_ptr
310 extern STDCHAR *PerlIO_get_ptr(PerlIO *);
312 #ifndef PerlIO_get_cnt
313 extern int PerlIO_get_cnt(PerlIO *);
315 #ifndef PerlIO_set_cnt
316 extern void PerlIO_set_cnt(PerlIO *, int);
318 #ifndef PerlIO_set_ptrcnt
319 extern void PerlIO_set_ptrcnt(PerlIO *, STDCHAR *, int);
321 #ifndef PerlIO_get_base
322 extern STDCHAR *PerlIO_get_base(PerlIO *);
324 #ifndef PerlIO_get_bufsiz
325 extern int PerlIO_get_bufsiz(PerlIO *);
327 #ifndef PerlIO_tmpfile
328 extern PerlIO *PerlIO_tmpfile(void);
331 extern PerlIO *PerlIO_stdin(void);
333 #ifndef PerlIO_stdout
334 extern PerlIO *PerlIO_stdout(void);
336 #ifndef PerlIO_stderr
337 extern PerlIO *PerlIO_stderr(void);
339 #ifndef PerlIO_getpos
340 extern int PerlIO_getpos(PerlIO *, SV *);
342 #ifndef PerlIO_setpos
343 extern int PerlIO_setpos(PerlIO *, SV *);
345 #ifndef PerlIO_fdupopen
346 extern PerlIO *PerlIO_fdupopen(pTHX_ PerlIO *, CLONE_PARAMS *, int);
348 #if !defined(PerlIO_modestr) && !defined(PERLIO_IS_STDIO)
349 extern char *PerlIO_modestr(PerlIO *, char *buf);
351 #ifndef PerlIO_isutf8
352 extern int PerlIO_isutf8(PerlIO *);
354 #ifndef PerlIO_apply_layers
355 extern int PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode,
358 #ifndef PerlIO_binmode
359 extern int PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int omode,
362 #ifndef PerlIO_getname
363 extern char *PerlIO_getname(PerlIO *, char *);
366 extern void PerlIO_destruct(pTHX);
368 extern int PerlIO_intmode2str(int rawmode, char *mode, int *writing);
371 extern void PerlIO_cleanup(pTHX);
373 extern void PerlIO_debug(const char *fmt, ...);
374 typedef struct PerlIO_list_s PerlIO_list_t;
380 #endif /* _PERLIO_H */