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
58 int fseeko(FILE *stream, off_t offset, int whence);
59 off_t ftello(FILE *stream);
62 #if defined(USE_64_BIT_STDIO) && defined(HAS_FTELLO) && !defined(USE_FTELL64)
66 #if defined(USE_64_BIT_STDIO) && defined(HAS_FSEEKO) && !defined(USE_FSEEK64)
70 /* BS2000 includes are sometimes a bit non standard :-( */
71 #if defined(POSIX_BC) && defined(O_BINARY) && !defined(O_TEXT)
75 #ifdef PERLIO_IS_STDIO
76 /* #define PerlIO_xxxx() as equivalent stdio function */
78 #else /* PERLIO_IS_STDIO */
80 /* #define PerlIO_xxxx() as equivalent sfio function */
83 #endif /* PERLIO_IS_STDIO */
86 /* ----------- PerlIO implementation ---------- */
87 /* PerlIO not #define-d to something else - define the implementation */
89 typedef struct _PerlIO PerlIOl;
90 typedef struct _PerlIO_funcs PerlIO_funcs;
91 typedef PerlIOl *PerlIO;
93 #define PERLIO_LAYERS 1
95 extern void PerlIO_define_layer(pTHX_ PerlIO_funcs *tab);
96 extern PerlIO_funcs *PerlIO_find_layer(pTHX_ const char *name, STRLEN len,
98 extern PerlIO *PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab,
99 const char *mode, SV *arg);
100 extern void PerlIO_pop(pTHX_ PerlIO *f);
101 extern void PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param);
105 /* ----------- End of implementation choices ---------- */
107 #ifndef PERLIO_IS_STDIO
108 /* Not using stdio _directly_ as PerlIO */
110 /* We now need to determine what happens if source trys to use stdio.
111 * There are three cases based on PERLIO_NOT_STDIO which XS code
112 * can set how it wants.
116 /* Make a choice for perl core code
117 - currently this is set to try and catch lingering raw stdio calls.
118 This is a known issue with some non UNIX ports which still use
119 "native" stdio features.
121 #ifndef PERLIO_NOT_STDIO
122 #define PERLIO_NOT_STDIO 1
125 #ifndef PERLIO_NOT_STDIO
126 #define PERLIO_NOT_STDIO 0
130 #ifdef PERLIO_NOT_STDIO
133 * PERLIO_NOT_STDIO #define'd as 1
134 * Case 1: Strong denial of stdio - make all stdio calls (we can think of) errors
137 #else /* if PERLIO_NOT_STDIO */
139 * PERLIO_NOT_STDIO #define'd as 0
140 * Case 2: Declares that both PerlIO and stdio can be used
142 #endif /* if PERLIO_NOT_STDIO */
143 #else /* ifdef PERLIO_NOT_STDIO */
145 * PERLIO_NOT_STDIO not defined
146 * Case 3: Try and fake stdio calls as PerlIO calls
148 #include "fakesdio.h"
149 #endif /* ifndef PERLIO_NOT_STDIO */
150 #endif /* PERLIO_IS_STDIO */
152 #define specialCopIO(sv) ((sv) != Nullsv)
154 /* ----------- fill in things that have not got #define'd ---------- */
164 /* This is to catch case with no stdio */
181 #define PERLIO_DUP_CLONE 1
182 #define PERLIO_DUP_FD 2
184 /* --------------------- Now prototypes for functions --------------- */
187 #ifndef NEXT30_NO_ATTRIBUTE
188 #ifndef HASATTRIBUTE /* disable GNU-cc attribute checking? */
189 #ifdef __attribute__ /* Avoid possible redefinition errors */
192 #define __attribute__(attr)
196 extern void PerlIO_init(pTHX);
198 #ifndef PerlIO_stdoutf
199 extern int PerlIO_stdoutf(const char *, ...)
200 __attribute__ ((__format__(__printf__, 1, 2)));
203 extern int PerlIO_puts(PerlIO *, const char *);
206 extern PerlIO *PerlIO_open(const char *, const char *);
209 extern PerlIO *PerlIO_openn(pTHX_ const char *layers, const char *mode,
210 int fd, int imode, int perm, PerlIO *old,
214 extern int PerlIO_close(PerlIO *);
217 extern int PerlIO_eof(PerlIO *);
220 extern int PerlIO_error(PerlIO *);
222 #ifndef PerlIO_clearerr
223 extern void PerlIO_clearerr(PerlIO *);
226 extern int PerlIO_getc(PerlIO *);
229 extern int PerlIO_putc(PerlIO *, int);
232 extern int PerlIO_flush(PerlIO *);
234 #ifndef PerlIO_ungetc
235 extern int PerlIO_ungetc(PerlIO *, int);
237 #ifndef PerlIO_fileno
238 extern int PerlIO_fileno(PerlIO *);
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 */