4 Interface for perl to IO functions.
5 There is a hierachy of Configure determined #define controls:
6 USE_STDIO - forces PerlIO_xxx() to be #define-d onto stdio functions.
7 This is used for x2p subdirectory and for conservative
8 builds - "just like perl5.00X used to be".
9 This dominates over the others.
11 USE_PERLIO - The primary Configure variable that enables PerlIO.
12 If USE_PERLIO is _NOT_ set
13 then USE_STDIO above will be set to be conservative.
15 then there are two modes determined by USE_SFIO:
17 USE_SFIO - If set causes PerlIO_xxx() to be #define-d onto sfio functions.
18 A backward compatability mode for some specialist applications.
20 If USE_SFIO is not set then PerlIO_xxx() are real functions
21 defined in perlio.c which implement extra functionality
22 required for utf8 support.
24 One further note - the table-of-functions scheme controlled
25 by PERL_IMPLICIT_SYS turns on USE_PERLIO so that iperlsys.h can
26 #define PerlIO_xxx() to go via the function table, without having
27 to #undef them from (say) stdio forms.
31 #if defined(PERL_IMPLICIT_SYS)
44 # ifndef PERLIO_IS_STDIO
45 # define PERLIO_IS_STDIO
49 /* -------------------- End of Configure controls ---------------------------- */
52 * Although we may not want stdio to be used including <stdio.h> here
53 * avoids issues where stdio.h has strange side effects
57 #if defined(USE_64_BIT_STDIO) && defined(HAS_FTELLO) && !defined(USE_FTELL64)
61 #if defined(USE_64_BIT_STDIO) && defined(HAS_FSEEKO) && !defined(USE_FSEEK64)
65 /* BS2000 includes are sometimes a bit non standard :-( */
66 #if defined(POSIX_BC) && defined(O_BINARY) && !defined(O_TEXT)
70 #ifdef PERLIO_IS_STDIO
71 /* #define PerlIO_xxxx() as equivalent stdio function */
73 #else /* PERLIO_IS_STDIO */
75 /* #define PerlIO_xxxx() as equivalent sfio function */
78 #endif /* PERLIO_IS_STDIO */
81 /* ----------- PerlIO implementation ---------- */
82 /* PerlIO not #define-d to something else - define the implementation */
84 typedef struct _PerlIO PerlIOl;
85 typedef struct _PerlIO_funcs PerlIO_funcs;
86 typedef PerlIOl *PerlIO;
88 #define PERLIO_LAYERS 1
90 extern void PerlIO_define_layer (pTHX_ PerlIO_funcs *tab);
91 extern PerlIO_funcs *PerlIO_find_layer (pTHX_ const char *name, STRLEN len, int load);
92 extern PerlIO * PerlIO_push (pTHX_ PerlIO *f,PerlIO_funcs *tab,const char *mode,SV *arg);
93 extern void PerlIO_pop (pTHX_ PerlIO *f);
97 /* ----------- End of implementation choices ---------- */
99 #ifndef PERLIO_IS_STDIO
100 /* Not using stdio _directly_ as PerlIO */
102 /* We now need to determine what happens if source trys to use stdio.
103 * There are three cases based on PERLIO_NOT_STDIO which XS code
104 * can set how it wants.
108 /* Make a choice for perl core code
109 - currently this is set to try and catch lingering raw stdio calls.
110 This is a known issue with some non UNIX ports which still use
111 "native" stdio features.
113 #ifndef PERLIO_NOT_STDIO
114 #define PERLIO_NOT_STDIO 1
117 #ifndef PERLIO_NOT_STDIO
118 #define PERLIO_NOT_STDIO 0
122 #ifdef PERLIO_NOT_STDIO
125 * PERLIO_NOT_STDIO #define'd as 1
126 * Case 1: Strong denial of stdio - make all stdio calls (we can think of) errors
129 #else /* if PERLIO_NOT_STDIO */
131 * PERLIO_NOT_STDIO #define'd as 0
132 * Case 2: Declares that both PerlIO and stdio can be used
134 #endif /* if PERLIO_NOT_STDIO */
135 #else /* ifdef PERLIO_NOT_STDIO */
137 * PERLIO_NOT_STDIO not defined
138 * Case 3: Try and fake stdio calls as PerlIO calls
140 #include "fakesdio.h"
141 #endif /* ifndef PERLIO_NOT_STDIO */
142 #endif /* PERLIO_IS_STDIO */
144 #define specialCopIO(sv) ((sv) != Nullsv)
146 /* ----------- fill in things that have not got #define'd ---------- */
156 /* This is to catch case with no stdio */
173 /* --------------------- Now prototypes for functions --------------- */
177 #ifndef NEXT30_NO_ATTRIBUTE
178 #ifndef HASATTRIBUTE /* disable GNU-cc attribute checking? */
179 #ifdef __attribute__ /* Avoid possible redefinition errors */
182 #define __attribute__(attr)
187 extern void PerlIO_init (void);
189 #ifndef PerlIO_stdoutf
190 extern int PerlIO_stdoutf (const char *,...)
191 __attribute__((__format__ (__printf__, 1, 2)));
194 extern int PerlIO_puts (PerlIO *,const char *);
197 extern PerlIO * PerlIO_open (const char *,const char *);
200 extern PerlIO * PerlIO_openn (pTHX_ const char *layers, const char *mode,int fd,int imode,int perm,PerlIO *old,int narg,SV **arg);
203 extern int PerlIO_close (PerlIO *);
206 extern int PerlIO_eof (PerlIO *);
209 extern int PerlIO_error (PerlIO *);
211 #ifndef PerlIO_clearerr
212 extern void PerlIO_clearerr (PerlIO *);
215 extern int PerlIO_getc (PerlIO *);
218 extern int PerlIO_putc (PerlIO *,int);
221 extern int PerlIO_flush (PerlIO *);
223 #ifndef PerlIO_ungetc
224 extern int PerlIO_ungetc (PerlIO *,int);
226 #ifndef PerlIO_fileno
227 extern int PerlIO_fileno (PerlIO *);
229 #ifndef PerlIO_fdopen
230 extern PerlIO * PerlIO_fdopen (int, const char *);
232 #ifndef PerlIO_importFILE
233 extern PerlIO * PerlIO_importFILE (FILE *,int);
235 #ifndef PerlIO_exportFILE
236 extern FILE * PerlIO_exportFILE (PerlIO *,int);
238 #ifndef PerlIO_findFILE
239 extern FILE * PerlIO_findFILE (PerlIO *);
241 #ifndef PerlIO_releaseFILE
242 extern void PerlIO_releaseFILE (PerlIO *,FILE *);
245 extern SSize_t PerlIO_read (PerlIO *,void *,Size_t);
247 #ifndef PerlIO_unread
248 extern SSize_t PerlIO_unread (PerlIO *,const void *,Size_t);
251 extern SSize_t PerlIO_write (PerlIO *,const void *,Size_t);
253 #ifndef PerlIO_setlinebuf
254 extern void PerlIO_setlinebuf (PerlIO *);
256 #ifndef PerlIO_printf
257 extern int PerlIO_printf (PerlIO *, const char *,...)
258 __attribute__((__format__ (__printf__, 2, 3)));
260 #ifndef PerlIO_sprintf
261 extern int PerlIO_sprintf (char *, int, const char *,...)
262 __attribute__((__format__ (__printf__, 3, 4)));
264 #ifndef PerlIO_vprintf
265 extern int PerlIO_vprintf (PerlIO *, const char *, va_list);
268 extern Off_t PerlIO_tell (PerlIO *);
271 extern int PerlIO_seek (PerlIO *, Off_t, int);
273 #ifndef PerlIO_rewind
274 extern void PerlIO_rewind (PerlIO *);
276 #ifndef PerlIO_has_base
277 extern int PerlIO_has_base (PerlIO *);
279 #ifndef PerlIO_has_cntptr
280 extern int PerlIO_has_cntptr (PerlIO *);
282 #ifndef PerlIO_fast_gets
283 extern int PerlIO_fast_gets (PerlIO *);
285 #ifndef PerlIO_canset_cnt
286 extern int PerlIO_canset_cnt (PerlIO *);
288 #ifndef PerlIO_get_ptr
289 extern STDCHAR * PerlIO_get_ptr (PerlIO *);
291 #ifndef PerlIO_get_cnt
292 extern int PerlIO_get_cnt (PerlIO *);
294 #ifndef PerlIO_set_cnt
295 extern void PerlIO_set_cnt (PerlIO *,int);
297 #ifndef PerlIO_set_ptrcnt
298 extern void PerlIO_set_ptrcnt (PerlIO *,STDCHAR *,int);
300 #ifndef PerlIO_get_base
301 extern STDCHAR * PerlIO_get_base (PerlIO *);
303 #ifndef PerlIO_get_bufsiz
304 extern int PerlIO_get_bufsiz (PerlIO *);
306 #ifndef PerlIO_tmpfile
307 extern PerlIO * PerlIO_tmpfile (void);
310 extern PerlIO * PerlIO_stdin (void);
312 #ifndef PerlIO_stdout
313 extern PerlIO * PerlIO_stdout (void);
315 #ifndef PerlIO_stderr
316 extern PerlIO * PerlIO_stderr (void);
318 #ifndef PerlIO_getpos
319 extern int PerlIO_getpos (PerlIO *,SV *);
321 #ifndef PerlIO_setpos
322 extern int PerlIO_setpos (PerlIO *,SV *);
324 #ifndef PerlIO_fdupopen
325 extern PerlIO * PerlIO_fdupopen (pTHX_ PerlIO *);
327 #if !defined(PerlIO_modestr) && !defined(PERLIO_IS_STDIO)
328 extern char *PerlIO_modestr (PerlIO *,char *buf);
330 #ifndef PerlIO_isutf8
331 extern int PerlIO_isutf8 (PerlIO *);
333 #ifndef PerlIO_apply_layers
334 extern int PerlIO_apply_layers (pTHX_ PerlIO *f, const char *mode, const char *names);
336 #ifndef PerlIO_binmode
337 extern int PerlIO_binmode (pTHX_ PerlIO *f, int iotype, int omode, const char *names);
339 #ifndef PerlIO_getname
340 extern char * PerlIO_getname (PerlIO *, char *);
343 extern void PerlIO_destruct(pTHX);
345 #ifndef PERLIO_IS_STDIO
347 extern void PerlIO_cleanup(void);
349 extern void PerlIO_debug(const char *fmt,...);
355 #endif /* _PERLIO_H */