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,
93 extern PerlIO *PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab,
94 const char *mode, SV *arg);
95 extern void PerlIO_pop(pTHX_ PerlIO *f);
99 /* ----------- End of implementation choices ---------- */
101 #ifndef PERLIO_IS_STDIO
102 /* Not using stdio _directly_ as PerlIO */
104 /* We now need to determine what happens if source trys to use stdio.
105 * There are three cases based on PERLIO_NOT_STDIO which XS code
106 * can set how it wants.
110 /* Make a choice for perl core code
111 - currently this is set to try and catch lingering raw stdio calls.
112 This is a known issue with some non UNIX ports which still use
113 "native" stdio features.
115 #ifndef PERLIO_NOT_STDIO
116 #define PERLIO_NOT_STDIO 1
119 #ifndef PERLIO_NOT_STDIO
120 #define PERLIO_NOT_STDIO 0
124 #ifdef PERLIO_NOT_STDIO
127 * PERLIO_NOT_STDIO #define'd as 1
128 * Case 1: Strong denial of stdio - make all stdio calls (we can think of) errors
131 #else /* if PERLIO_NOT_STDIO */
133 * PERLIO_NOT_STDIO #define'd as 0
134 * Case 2: Declares that both PerlIO and stdio can be used
136 #endif /* if PERLIO_NOT_STDIO */
137 #else /* ifdef PERLIO_NOT_STDIO */
139 * PERLIO_NOT_STDIO not defined
140 * Case 3: Try and fake stdio calls as PerlIO calls
142 #include "fakesdio.h"
143 #endif /* ifndef PERLIO_NOT_STDIO */
144 #endif /* PERLIO_IS_STDIO */
146 #define specialCopIO(sv) ((sv) != Nullsv)
148 /* ----------- fill in things that have not got #define'd ---------- */
158 /* This is to catch case with no stdio */
175 /* --------------------- Now prototypes for functions --------------- */
178 #ifndef NEXT30_NO_ATTRIBUTE
179 #ifndef HASATTRIBUTE /* disable GNU-cc attribute checking? */
180 #ifdef __attribute__ /* Avoid possible redefinition errors */
183 #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,
201 int fd, int imode, int perm, PerlIO *old,
205 extern int PerlIO_close(PerlIO *);
208 extern int PerlIO_eof(PerlIO *);
211 extern int PerlIO_error(PerlIO *);
213 #ifndef PerlIO_clearerr
214 extern void PerlIO_clearerr(PerlIO *);
217 extern int PerlIO_getc(PerlIO *);
220 extern int PerlIO_putc(PerlIO *, int);
223 extern int PerlIO_flush(PerlIO *);
225 #ifndef PerlIO_ungetc
226 extern int PerlIO_ungetc(PerlIO *, int);
228 #ifndef PerlIO_fileno
229 extern int PerlIO_fileno(PerlIO *);
231 #ifndef PerlIO_fdopen
232 extern PerlIO *PerlIO_fdopen(int, const char *);
234 #ifndef PerlIO_importFILE
235 extern PerlIO *PerlIO_importFILE(FILE *, int);
237 #ifndef PerlIO_exportFILE
238 extern FILE *PerlIO_exportFILE(PerlIO *, int);
240 #ifndef PerlIO_findFILE
241 extern FILE *PerlIO_findFILE(PerlIO *);
243 #ifndef PerlIO_releaseFILE
244 extern void PerlIO_releaseFILE(PerlIO *, FILE *);
247 extern SSize_t PerlIO_read(PerlIO *, void *, Size_t);
249 #ifndef PerlIO_unread
250 extern SSize_t PerlIO_unread(PerlIO *, const void *, Size_t);
253 extern SSize_t PerlIO_write(PerlIO *, const void *, Size_t);
255 #ifndef PerlIO_setlinebuf
256 extern void PerlIO_setlinebuf(PerlIO *);
258 #ifndef PerlIO_printf
259 extern int PerlIO_printf(PerlIO *, const char *, ...)
260 __attribute__ ((__format__(__printf__, 2, 3)));
262 #ifndef PerlIO_sprintf
263 extern int PerlIO_sprintf(char *, int, const char *, ...)
264 __attribute__ ((__format__(__printf__, 3, 4)));
266 #ifndef PerlIO_vprintf
267 extern int PerlIO_vprintf(PerlIO *, const char *, va_list);
270 extern Off_t PerlIO_tell(PerlIO *);
273 extern int PerlIO_seek(PerlIO *, Off_t, int);
275 #ifndef PerlIO_rewind
276 extern void PerlIO_rewind(PerlIO *);
278 #ifndef PerlIO_has_base
279 extern int PerlIO_has_base(PerlIO *);
281 #ifndef PerlIO_has_cntptr
282 extern int PerlIO_has_cntptr(PerlIO *);
284 #ifndef PerlIO_fast_gets
285 extern int PerlIO_fast_gets(PerlIO *);
287 #ifndef PerlIO_canset_cnt
288 extern int PerlIO_canset_cnt(PerlIO *);
290 #ifndef PerlIO_get_ptr
291 extern STDCHAR *PerlIO_get_ptr(PerlIO *);
293 #ifndef PerlIO_get_cnt
294 extern int PerlIO_get_cnt(PerlIO *);
296 #ifndef PerlIO_set_cnt
297 extern void PerlIO_set_cnt(PerlIO *, int);
299 #ifndef PerlIO_set_ptrcnt
300 extern void PerlIO_set_ptrcnt(PerlIO *, STDCHAR *, int);
302 #ifndef PerlIO_get_base
303 extern STDCHAR *PerlIO_get_base(PerlIO *);
305 #ifndef PerlIO_get_bufsiz
306 extern int PerlIO_get_bufsiz(PerlIO *);
308 #ifndef PerlIO_tmpfile
309 extern PerlIO *PerlIO_tmpfile(void);
312 extern PerlIO *PerlIO_stdin(void);
314 #ifndef PerlIO_stdout
315 extern PerlIO *PerlIO_stdout(void);
317 #ifndef PerlIO_stderr
318 extern PerlIO *PerlIO_stderr(void);
320 #ifndef PerlIO_getpos
321 extern int PerlIO_getpos(PerlIO *, SV *);
323 #ifndef PerlIO_setpos
324 extern int PerlIO_setpos(PerlIO *, SV *);
326 #ifndef PerlIO_fdupopen
327 extern PerlIO *PerlIO_fdupopen(pTHX_ PerlIO *);
329 #if !defined(PerlIO_modestr) && !defined(PERLIO_IS_STDIO)
330 extern char *PerlIO_modestr(PerlIO *, char *buf);
332 #ifndef PerlIO_isutf8
333 extern int PerlIO_isutf8(PerlIO *);
335 #ifndef PerlIO_apply_layers
336 extern int PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode,
339 #ifndef PerlIO_binmode
340 extern int PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int omode,
343 #ifndef PerlIO_getname
344 extern char *PerlIO_getname(PerlIO *, char *);
347 extern void PerlIO_destruct(pTHX);
349 #ifndef PERLIO_IS_STDIO
351 extern void PerlIO_cleanup(void);
353 extern void PerlIO_debug(const char *fmt, ...);
358 #endif /* _PERLIO_H */