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update from main archive 961220
[glibc.git] / stdio-common / vfprintf.c
blobd24c917bc2fcaffa8dd256b736893e9d365600c5
1 /* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
18
19 #include <ctype.h>
20 #include <limits.h>
21 #include <printf.h>
22 #include <stdarg.h>
23 #include <stdlib.h>
24 #include <errno.h>
25 #include <wchar.h>
26 #include <libc-lock.h>
27 #include <sys/param.h>
28 #include "_itoa.h"
29 #include "../locale/localeinfo.h"
30
31 /* This code is shared between the standard stdio implementation found
32 in GNU C library and the libio implementation originally found in
33 GNU libg++.
34
35 Beside this it is also shared between the normal and wide character
36 implementation as defined in ISO/IEC 9899:1990/Amendment 1:1995. */
37
38 #ifndef COMPILE_WPRINTF
39 # define CHAR_T char
40 # define UCHAR_T unsigned char
41 # define INT_T int
42 # define L_(Str) Str
43 # define ISDIGIT(Ch) isdigit (Ch)
44
45 # ifdef USE_IN_LIBIO
46 # define PUT(F, S, N) _IO_sputn ((F), (S), (N))
47 # define PAD(Padchar) \
48 if (width > 0) \
49 done += _IO_padn (s, (Padchar), width)
50 # else
51 # define PUTC(C, F) putc (C, F)
52 ssize_t __printf_pad __P ((FILE *, char pad, size_t n));
53 # define PAD(Padchar) \
54 if (width > 0) \
55 { ssize_t __res = __printf_pad (s, (Padchar), width); \
56 if (__res == -1) return -1; \
57 done += __res; }
58 # endif
59 #else
60 # define vfprintf vfwprintf
61 # define CHAR_T wchar_t
62 # define UCHAR_T uwchar_t
63 # define INT_T wint_t
64 # define L_(Str) L##Str
65 # define ISDIGIT(Ch) iswdigit (Ch)
66
67 # ifdef USE_IN_LIBIO
68 # define PUT(F, S, N) _IO_sputn ((F), (S), (N))
69 # define PAD(Padchar) \
70 if (width > 0) \
71 done += _IO_wpadn (s, (Padchar), width)
72 # else
73 # define PUTC(C, F) wputc (C, F)
74 ssize_t __wprintf_pad __P ((FILE *, wchar_t pad, size_t n));
75 # define PAD(Padchar) \
76 if (width > 0) \
77 { ssize_t __res = __wprintf_pad (s, (Padchar), width); \
78 if (__res == -1) return -1; \
79 done += __res; }
80 # endif
81 #endif
82
83 /* Include the shared code for parsing the format string. */
84 #include "printf-parse.h"
85
86
87 #ifdef USE_IN_LIBIO
88 /* This code is for use in libio. */
89 # include <libioP.h>
90 # define PUTC(C, F) _IO_putc_unlocked (C, F)
91 # define vfprintf _IO_vfprintf
92 # define FILE _IO_FILE
93 # undef va_list
94 # define va_list _IO_va_list
95 # undef BUFSIZ
96 # define BUFSIZ _IO_BUFSIZ
97 # define ARGCHECK(S, Format) \
98 do \
99 { \
100 /* Check file argument for consistence. */ \
101 CHECK_FILE (S, -1); \
102 if (S->_flags & _IO_NO_WRITES) \
103 { \
104 __set_errno (EBADF); \
105 return -1; \
106 } \
107 if (Format == NULL) \
108 { \
109 MAYBE_SET_EINVAL; \
110 return -1; \
111 } \
112 } while (0)
113 # define UNBUFFERED_P(S) ((S)->_IO_file_flags & _IO_UNBUFFERED)
114 #else /* ! USE_IN_LIBIO */
115 /* This code is for use in the GNU C library. */
116 # include <stdio.h>
117 # define PUT(F, S, N) fwrite (S, 1, N, F)
118 # define ARGCHECK(S, Format) \
119 do \
120 { \
121 /* Check file argument for consistence. */ \
122 if (!__validfp (S) || !S->__mode.__write) \
123 { \
124 __set_errno (EBADF); \
125 return -1; \
126 } \
127 if (Format == NULL) \
128 { \
129 __set_errno (EINVAL); \
130 return -1; \
131 } \
132 if (!S->__seen) \
133 { \
134 if (__flshfp (S, EOF) == EOF) \
135 return -1; \
136 } \
137 } \
138 while (0)
139 # define UNBUFFERED_P(s) ((s)->__buffer == NULL)
140
141 /* XXX These declarations should go as soon as the stdio header files
142 have these prototypes. */
143 extern void __flockfile (FILE *);
144 extern void __funlockfile (FILE *);
145 #endif /* USE_IN_LIBIO */
146
147
148 #define outchar(Ch) \
149 do \
150 { \
151 register const int outc = (Ch); \
152 if (PUTC (outc, s) == EOF) \
153 return -1; \
154 else \
155 ++done; \
156 } \
157 while (0)
158
159 #define outstring(String, Len) \
160 do \
161 { \
162 if ((size_t) PUT (s, (String), (Len)) != (size_t) (Len)) \
163 return -1; \
164 done += (Len); \
165 } \
166 while (0)
167
168 /* For handling long_double and longlong we use the same flag. */
169 #ifndef is_longlong
170 # define is_longlong is_long_double
171 #endif
172
173
174 /* Global variables. */
175 static const char null[] = "(null)";
176
177
178 /* Helper function to provide temporary buffering for unbuffered streams. */
179 static int buffered_vfprintf __P ((FILE *stream, const CHAR_T *fmt, va_list));
180
181 /* Handle unknown format specifier. */
182 static int printf_unknown __P ((FILE *, const struct printf_info *,
183 const void *const *));
184
185 /* Group digits of number string. */
186 static char *group_number __P ((CHAR_T *, CHAR_T *, const CHAR_T *, wchar_t));
187
188
189 /* The function itself. */
190 int
191 vfprintf (FILE *s, const CHAR_T *format, va_list ap)
192 {
193 /* The character used as thousands separator. */
194 wchar_t thousands_sep;
195
196 /* The string describing the size of groups of digits. */
197 const char *grouping;
198
199 /* Place to accumulate the result. */
200 int done;
201
202 /* Current character in format string. */
203 const UCHAR_T *f;
204
205 /* End of leading constant string. */
206 const UCHAR_T *lead_str_end;
207
208 /* Points to next format specifier. */
209 const UCHAR_T *end_of_spec;
210
211 /* Buffer intermediate results. */
212 char work_buffer[1000];
213 #define workend (&work_buffer[sizeof (work_buffer) - 1])
214
215 /* State for restartable multibyte character handling functions. */
216 mbstate_t mbstate;
217
218 /* We have to save the original argument pointer. */
219 va_list ap_save;
220
221 /* Count number of specifiers we already processed. */
222 int nspecs_done;
223
224 /* For the %m format we may need the current `errno' value. */
225 int save_errno = errno;
226
227
228 /* This table maps a character into a number representing a
229 class. In each step there is a destination label for each
230 class. */
231 static const int jump_table[] =
232 {
233 /* ' ' */ 1, 0, 0, /* '#' */ 4,
234 0, /* '%' */ 14, 0, /* '\''*/ 6,
235 0, 0, /* '*' */ 7, /* '+' */ 2,
236 0, /* '-' */ 3, /* '.' */ 9, 0,
237 /* '0' */ 5, /* '1' */ 8, /* '2' */ 8, /* '3' */ 8,
238 /* '4' */ 8, /* '5' */ 8, /* '6' */ 8, /* '7' */ 8,
239 /* '8' */ 8, /* '9' */ 8, 0, 0,
240 0, 0, 0, 0,
241 0, 0, 0, /* 'C' */ 25,
242 0, /* 'E' */ 19, 0, /* 'G' */ 19,
243 0, 0, 0, 0,
244 /* 'L' */ 12, 0, 0, 0,
245 0, 0, 0, /* 'S' */ 21,
246 0, 0, 0, 0,
247 /* 'X' */ 18, 0, /* 'Z' */ 13, 0,
248 0, 0, 0, 0,
249 0, 0, 0, /* 'c' */ 20,
250 /* 'd' */ 15, /* 'e' */ 19, /* 'f' */ 19, /* 'g' */ 19,
251 /* 'h' */ 10, /* 'i' */ 15, 0, 0,
252 /* 'l' */ 11, /* 'm' */ 24, /* 'n' */ 23, /* 'o' */ 17,
253 /* 'p' */ 22, /* 'q' */ 12, 0, /* 's' */ 21,
254 0, /* 'u' */ 16, 0, 0,
255 /* 'x' */ 18
256 };
257
258 #define NOT_IN_JUMP_RANGE(Ch) ((Ch) < ' ' || (Ch) > 'x')
259 #define CHAR_CLASS(Ch) (jump_table[(int) (Ch) - ' '])
260 #define JUMP(ChExpr, table) \
261 do \
262 { \
263 const void *ptr; \
264 spec = (ChExpr); \
265 ptr = NOT_IN_JUMP_RANGE (spec) ? REF (form_unknown) \
266 : table[CHAR_CLASS (spec)]; \
267 goto *ptr; \
268 } \
269 while (0)
270
271 #define STEP0_3_TABLE \
272 /* Step 0: at the beginning. */ \
273 static const void *step0_jumps[26] = \
274 { \
275 REF (form_unknown), \
276 REF (flag_space), /* for ' ' */ \
277 REF (flag_plus), /* for '+' */ \
278 REF (flag_minus), /* for '-' */ \
279 REF (flag_hash), /* for '<hash>' */ \
280 REF (flag_zero), /* for '0' */ \
281 REF (flag_quote), /* for '\'' */ \
282 REF (width_asterics), /* for '*' */ \
283 REF (width), /* for '1'...'9' */ \
284 REF (precision), /* for '.' */ \
285 REF (mod_half), /* for 'h' */ \
286 REF (mod_long), /* for 'l' */ \
287 REF (mod_longlong), /* for 'L', 'q' */ \
288 REF (mod_size_t), /* for 'Z' */ \
289 REF (form_percent), /* for '%' */ \
290 REF (form_integer), /* for 'd', 'i' */ \
291 REF (form_unsigned), /* for 'u' */ \
292 REF (form_octal), /* for 'o' */ \
293 REF (form_hexa), /* for 'X', 'x' */ \
294 REF (form_float), /* for 'E', 'e', 'f', 'G', 'g' */ \
295 REF (form_character), /* for 'c' */ \
296 REF (form_string), /* for 's', 'S' */ \
297 REF (form_pointer), /* for 'p' */ \
298 REF (form_number), /* for 'n' */ \
299 REF (form_strerror), /* for 'm' */ \
300 REF (form_wcharacter) /* for 'C' */ \
301 }; \
302 /* Step 1: after processing width. */ \
303 static const void *step1_jumps[26] = \
304 { \
305 REF (form_unknown), \
306 REF (form_unknown), /* for ' ' */ \
307 REF (form_unknown), /* for '+' */ \
308 REF (form_unknown), /* for '-' */ \
309 REF (form_unknown), /* for '<hash>' */ \
310 REF (form_unknown), /* for '0' */ \
311 REF (form_unknown), /* for '\'' */ \
312 REF (form_unknown), /* for '*' */ \
313 REF (form_unknown), /* for '1'...'9' */ \
314 REF (precision), /* for '.' */ \
315 REF (mod_half), /* for 'h' */ \
316 REF (mod_long), /* for 'l' */ \
317 REF (mod_longlong), /* for 'L', 'q' */ \
318 REF (mod_size_t), /* for 'Z' */ \
319 REF (form_percent), /* for '%' */ \
320 REF (form_integer), /* for 'd', 'i' */ \
321 REF (form_unsigned), /* for 'u' */ \
322 REF (form_octal), /* for 'o' */ \
323 REF (form_hexa), /* for 'X', 'x' */ \
324 REF (form_float), /* for 'E', 'e', 'f', 'G', 'g' */ \
325 REF (form_character), /* for 'c' */ \
326 REF (form_string), /* for 's', 'S' */ \
327 REF (form_pointer), /* for 'p' */ \
328 REF (form_number), /* for 'n' */ \
329 REF (form_strerror), /* for 'm' */ \
330 REF (form_wcharacter) /* for 'C' */ \
331 }; \
332 /* Step 2: after processing precision. */ \
333 static const void *step2_jumps[26] = \
334 { \
335 REF (form_unknown), \
336 REF (form_unknown), /* for ' ' */ \
337 REF (form_unknown), /* for '+' */ \
338 REF (form_unknown), /* for '-' */ \
339 REF (form_unknown), /* for '<hash>' */ \
340 REF (form_unknown), /* for '0' */ \
341 REF (form_unknown), /* for '\'' */ \
342 REF (form_unknown), /* for '*' */ \
343 REF (form_unknown), /* for '1'...'9' */ \
344 REF (form_unknown), /* for '.' */ \
345 REF (mod_half), /* for 'h' */ \
346 REF (mod_long), /* for 'l' */ \
347 REF (mod_longlong), /* for 'L', 'q' */ \
348 REF (mod_size_t), /* for 'Z' */ \
349 REF (form_percent), /* for '%' */ \
350 REF (form_integer), /* for 'd', 'i' */ \
351 REF (form_unsigned), /* for 'u' */ \
352 REF (form_octal), /* for 'o' */ \
353 REF (form_hexa), /* for 'X', 'x' */ \
354 REF (form_float), /* for 'E', 'e', 'f', 'G', 'g' */ \
355 REF (form_character), /* for 'c' */ \
356 REF (form_string), /* for 's', 'S' */ \
357 REF (form_pointer), /* for 'p' */ \
358 REF (form_number), /* for 'n' */ \
359 REF (form_strerror), /* for 'm' */ \
360 REF (form_wcharacter) /* for 'C' */ \
361 }; \
362 /* Step 3: after processing first 'l' modifier. */ \
363 static const void *step3_jumps[26] = \
364 { \
365 REF (form_unknown), \
366 REF (form_unknown), /* for ' ' */ \
367 REF (form_unknown), /* for '+' */ \
368 REF (form_unknown), /* for '-' */ \
369 REF (form_unknown), /* for '<hash>' */ \
370 REF (form_unknown), /* for '0' */ \
371 REF (form_unknown), /* for '\'' */ \
372 REF (form_unknown), /* for '*' */ \
373 REF (form_unknown), /* for '1'...'9' */ \
374 REF (form_unknown), /* for '.' */ \
375 REF (form_unknown), /* for 'h' */ \
376 REF (mod_longlong), /* for 'l' */ \
377 REF (form_unknown), /* for 'L', 'q' */ \
378 REF (form_unknown), /* for 'Z' */ \
379 REF (form_percent), /* for '%' */ \
380 REF (form_integer), /* for 'd', 'i' */ \
381 REF (form_unsigned), /* for 'u' */ \
382 REF (form_octal), /* for 'o' */ \
383 REF (form_hexa), /* for 'X', 'x' */ \
384 REF (form_float), /* for 'E', 'e', 'f', 'G', 'g' */ \
385 REF (form_character), /* for 'c' */ \
386 REF (form_string), /* for 's', 'S' */ \
387 REF (form_pointer), /* for 'p' */ \
388 REF (form_number), /* for 'n' */ \
389 REF (form_strerror), /* for 'm' */ \
390 REF (form_wcharacter) /* for 'C' */ \
391 }
392
393 #define STEP4_TABLE \
394 /* Step 4: processing format specifier. */ \
395 static const void *step4_jumps[26] = \
396 { \
397 REF (form_unknown), \
398 REF (form_unknown), /* for ' ' */ \
399 REF (form_unknown), /* for '+' */ \
400 REF (form_unknown), /* for '-' */ \
401 REF (form_unknown), /* for '<hash>' */ \
402 REF (form_unknown), /* for '0' */ \
403 REF (form_unknown), /* for '\'' */ \
404 REF (form_unknown), /* for '*' */ \
405 REF (form_unknown), /* for '1'...'9' */ \
406 REF (form_unknown), /* for '.' */ \
407 REF (form_unknown), /* for 'h' */ \
408 REF (form_unknown), /* for 'l' */ \
409 REF (form_unknown), /* for 'L', 'q' */ \
410 REF (form_unknown), /* for 'Z' */ \
411 REF (form_percent), /* for '%' */ \
412 REF (form_integer), /* for 'd', 'i' */ \
413 REF (form_unsigned), /* for 'u' */ \
414 REF (form_octal), /* for 'o' */ \
415 REF (form_hexa), /* for 'X', 'x' */ \
416 REF (form_float), /* for 'E', 'e', 'f', 'G', 'g' */ \
417 REF (form_character), /* for 'c' */ \
418 REF (form_string), /* for 's', 'S' */ \
419 REF (form_pointer), /* for 'p' */ \
420 REF (form_number), /* for 'n' */ \
421 REF (form_strerror), /* for 'm' */ \
422 REF (form_wcharacter) /* for 'C' */ \
423 }
424
425
426 #define process_arg(fspec) \
427 /* Start real work. We know about all flags and modifiers and \
428 now process the wanted format specifier. */ \
429 LABEL (form_percent): \
430 /* Write a literal "%". */ \
431 outchar ('%'); \
432 break; \
433 \
434 LABEL (form_integer): \
435 /* Signed decimal integer. */ \
436 base = 10; \
437 \
438 if (is_longlong) \
439 { \
440 long long int signed_number; \
441 \
442 if (fspec == NULL) \
443 signed_number = va_arg (ap, long long int); \
444 else \
445 signed_number = args_value[fspec->data_arg].pa_long_long_int; \
446 \
447 is_negative = signed_number < 0; \
448 number.longlong = is_negative ? (- signed_number) : signed_number; \
449 \
450 goto LABEL (longlong_number); \
451 } \
452 else \
453 { \
454 long int signed_number; \
455 \
456 if (fspec == NULL) \
457 if (is_long) \
458 signed_number = va_arg (ap, long int); \
459 else /* `short int' will be promoted to `int'. */ \
460 signed_number = va_arg (ap, int); \
461 else \
462 if (is_long) \
463 signed_number = args_value[fspec->data_arg].pa_long_int; \
464 else \
465 signed_number = args_value[fspec->data_arg].pa_int; \
466 \
467 is_negative = signed_number < 0; \
468 number.word = is_negative ? (- signed_number) : signed_number; \
469 \
470 goto LABEL (number); \
471 } \
472 /* NOTREACHED */ \
473 \
474 LABEL (form_unsigned): \
475 /* Unsigned decimal integer. */ \
476 base = 10; \
477 goto LABEL (unsigned_number); \
478 /* NOTREACHED */ \
479 \
480 LABEL (form_octal): \
481 /* Unsigned octal integer. */ \
482 base = 8; \
483 goto LABEL (unsigned_number); \
484 /* NOTREACHED */ \
485 \
486 LABEL (form_hexa): \
487 /* Unsigned hexadecimal integer. */ \
488 base = 16; \
489 \
490 LABEL (unsigned_number): /* Unsigned number of base BASE. */ \
491 \
492 /* ANSI specifies the `+' and ` ' flags only for signed \
493 conversions. */ \
494 is_negative = 0; \
495 showsign = 0; \
496 space = 0; \
497 \
498 if (is_longlong) \
499 { \
500 if (fspec == NULL) \
501 number.longlong = va_arg (ap, unsigned long long int); \
502 else \
503 number.longlong = args_value[fspec->data_arg].pa_u_long_long_int; \
504 \
505 LABEL (longlong_number): \
506 if (prec < 0) \
507 /* Supply a default precision if none was given. */ \
508 prec = 1; \
509 else \
510 /* We have to take care for the '0' flag. If a precision \
511 is given it must be ignored. */ \
512 pad = ' '; \
513 \
514 /* If the precision is 0 and the number is 0 nothing has to \
515 be written for the number. */ \
516 if (prec == 0 && number.longlong == 0) \
517 string = workend; \
518 else \
519 { \
520 /* Put the number in WORK. */ \
521 string = _itoa (number.longlong, workend + 1, base, \
522 spec == 'X'); \
523 string -= 1; \
524 if (group && grouping) \
525 string = group_number (string, workend, grouping, \
526 thousands_sep); \
527 } \
528 /* Simply further test for num != 0. */ \
529 number.word = number.longlong != 0; \
530 } \
531 else \
532 { \
533 if (fspec == NULL) \
534 if (is_long) \
535 number.word = va_arg (ap, unsigned long int); \
536 else if (!is_short) \
537 number.word = va_arg (ap, unsigned int); \
538 else \
539 number.word = (unsigned short int) va_arg (ap, unsigned int); \
540 else \
541 if (is_long) \
542 number.word = args_value[fspec->data_arg].pa_u_long_int; \
543 else if (!is_short) \
544 number.word = args_value[fspec->data_arg].pa_u_int; \
545 else \
546 number.word = (unsigned short int) \
547 args_value[fspec->data_arg].pa_u_short_int; \
548 \
549 LABEL (number): \
550 if (prec < 0) \
551 /* Supply a default precision if none was given. */ \
552 prec = 1; \
553 else \
554 /* We have to take care for the '0' flag. If a precision \
555 is given it must be ignored. */ \
556 pad = ' '; \
557 \
558 /* If the precision is 0 and the number is 0 nothing has to \
559 be written for the number. */ \
560 if (prec == 0 && number.word == 0) \
561 string = workend; \
562 else \
563 { \
564 /* Put the number in WORK. */ \
565 string = _itoa_word (number.word, workend + 1, base, \
566 spec == 'X'); \
567 string -= 1; \
568 if (group && grouping) \
569 string = group_number (string, workend, grouping, \
570 thousands_sep); \
571 } \
572 } \
573 \
574 prec -= workend - string; \
575 \
576 if (prec > 0) \
577 /* Add zeros to the precision. */ \
578 while (prec-- > 0) \
579 *string-- = '0'; \
580 else if (number.word != 0 && alt && base == 8) \
581 /* Add octal marker. */ \
582 *string-- = '0'; \
583 \
584 if (!left) \
585 { \
586 width -= workend - string; \
587 \
588 if (number.word != 0 && alt && base == 16) \
589 /* Account for 0X hex marker. */ \
590 width -= 2; \
591 \
592 if (is_negative || showsign || space) \
593 --width; \
594 \
595 if (pad == '0') \
596 { \
597 while (width-- > 0) \
598 *string-- = '0'; \
599 \
600 if (number.word != 0 && alt && base == 16) \
601 { \
602 *string-- = spec; \
603 *string-- = '0'; \
604 } \
605 \
606 if (is_negative) \
607 *string-- = '-'; \
608 else if (showsign) \
609 *string-- = '+'; \
610 else if (space) \
611 *string-- = ' '; \
612 } \
613 else \
614 { \
615 if (number.word != 0 && alt && base == 16) \
616 { \
617 *string-- = spec; \
618 *string-- = '0'; \
619 } \
620 \
621 if (is_negative) \
622 *string-- = '-'; \
623 else if (showsign) \
624 *string-- = '+'; \
625 else if (space) \
626 *string-- = ' '; \
627 \
628 while (width-- > 0) \
629 *string-- = ' '; \
630 } \
631 \
632 outstring (string + 1, workend - string); \
633 \
634 break; \
635 } \
636 else \
637 { \
638 if (number.word != 0 && alt && base == 16) \
639 { \
640 *string-- = spec; \
641 *string-- = '0'; \
642 } \
643 \
644 if (is_negative) \
645 *string-- = '-'; \
646 else if (showsign) \
647 *string-- = '+'; \
648 else if (space) \
649 *string-- = ' '; \
650 \
651 width -= workend - string; \
652 outstring (string + 1, workend - string); \
653 \
654 PAD (' '); \
655 break; \
656 } \
657 \
658 LABEL (form_float): \
659 { \
660 /* Floating-point number. This is handled by printf_fp.c. */ \
661 extern int __printf_fp __P ((FILE *, const struct printf_info *, \
662 const void **const)); \
663 const void *ptr; \
664 int function_done; \
665 \
666 if (fspec == NULL) \
667 { \
668 struct printf_info info = { prec: prec, \
669 width: width, \
670 spec: spec, \
671 is_long_double: is_long_double, \
672 is_short: is_short, \
673 is_long: is_long, \
674 alt: alt, \
675 space: space, \
676 left: left, \
677 showsign: showsign, \
678 group: group, \
679 pad: pad, \
680 extra: 0 }; \
681 \
682 if (is_long_double) \
683 the_arg.pa_long_double = va_arg (ap, long double); \
684 else \
685 the_arg.pa_double = va_arg (ap, double); \
686 ptr = (const void *) &the_arg; \
687 \
688 function_done = __printf_fp (s, &info, &ptr); \
689 } \
690 else \
691 { \
692 ptr = (const void *) &args_value[fspec->data_arg]; \
693 \
694 function_done = __printf_fp (s, &fspec->info, &ptr); \
695 } \
696 \
697 if (function_done < 0) \
698 /* Error in print handler. */ \
699 return -1; \
700 \
701 done += function_done; \
702 } \
703 break; \
704 \
705 LABEL (form_character): \
706 /* Character. */ \
707 if (is_long) \
708 goto LABEL (form_wcharacter); \
709 --width; /* Account for the character itself. */ \
710 if (!left) \
711 PAD (' '); \
712 if (fspec == NULL) \
713 outchar ((unsigned char) va_arg (ap, int)); /* Promoted. */ \
714 else \
715 outchar ((unsigned char) args_value[fspec->data_arg].pa_char); \
716 if (left) \
717 PAD (' '); \
718 break; \
719 \
720 LABEL (form_wcharacter): \
721 { \
722 /* Wide character. */ \
723 char buf[MB_CUR_MAX]; \
724 mbstate_t mbstate; \
725 size_t len; \
726 \
727 len = __wcrtomb (buf, (fspec == NULL ? va_arg (ap, wint_t) \
728 : args_value[fspec->data_arg].pa_wchar), \
729 &mbstate); \
730 width -= len; \
731 if (!left) \
732 PAD (' '); \
733 outstring (buf, len); \
734 if (left) \
735 PAD (' '); \
736 } \
737 break; \
738 \
739 LABEL (form_string): \
740 { \
741 size_t len; \
742 \
743 /* The string argument could in fact be `char *' or `wchar_t *'. \
744 But this should not make a difference here. */ \
745 if (fspec == NULL) \
746 string = (char *) va_arg (ap, const char *); \
747 else \
748 string = (char *) args_value[fspec->data_arg].pa_string; \
749 \
750 /* Entry point for printing other strings. */ \
751 LABEL (print_string): \
752 \
753 if (string == NULL) \
754 { \
755 /* Write "(null)" if there's space. */ \
756 if (prec == -1 || prec >= (int) sizeof (null) - 1) \
757 { \
758 string = (char *) null; \
759 len = sizeof (null) - 1; \
760 } \
761 else \
762 { \
763 string = (char *) ""; \
764 len = 0; \
765 } \
766 } \
767 else if (!is_long && spec != L_('S')) \
768 { \
769 if (prec != -1) \
770 /* Search for the end of the string, but don't search past \
771 the length specified by the precision. */ \
772 len = strnlen (string, prec); \
773 else \
774 len = strlen (string); \
775 } \
776 else \
777 { \
778 const wchar_t *s2 = (const wchar_t *) string; \
779 mbstate_t mbstate; \
780 \
781 len = __wcsrtombs (NULL, &s2, 0, &mbstate); \
782 if (len == (size_t) -1) \
783 /* Illegal wide-character string. */ \
784 return -1; \
785 \
786 s2 = (const wchar_t *) string; \
787 string = alloca (len + 1); \
788 (void) __wcsrtombs (string, &s2, prec != -1 ? prec : UINT_MAX, \
789 &mbstate); \
790 } \
791 \
792 if ((width -= len) < 0) \
793 { \
794 outstring (string, len); \
795 break; \
796 } \
797 \
798 if (!left) \
799 PAD (' '); \
800 outstring (string, len); \
801 if (left) \
802 PAD (' '); \
803 } \
804 break; \
805 \
806 LABEL (form_pointer): \
807 /* Generic pointer. */ \
808 { \
809 const void *ptr; \
810 if (fspec == NULL) \
811 ptr = va_arg (ap, void *); \
812 else \
813 ptr = args_value[fspec->data_arg].pa_pointer; \
814 if (ptr != NULL) \
815 { \
816 /* If the pointer is not NULL, write it as a %#x spec. */ \
817 base = 16; \
818 number.word = (unsigned long int) ptr; \
819 is_negative = 0; \
820 alt = 1; \
821 group = 0; \
822 spec = 'x'; \
823 goto LABEL (number); \
824 } \
825 else \
826 { \
827 /* Write "(nil)" for a nil pointer. */ \
828 string = (char *) "(nil)"; \
829 /* Make sure the full string "(nil)" is printed. */ \
830 if (prec < 5) \
831 prec = 5; \
832 is_long = 0; /* This is no wide-char string. */ \
833 goto LABEL (print_string); \
834 } \
835 } \
836 /* NOTREACHED */ \
837 \
838 LABEL (form_number): \
839 /* Answer the count of characters written. */ \
840 if (fspec == NULL) \
841 if (is_longlong) \
842 *(long long int *) va_arg (ap, void *) = done; \
843 else if (is_long) \
844 *(long int *) va_arg (ap, void *) = done; \
845 else if (!is_short) \
846 *(int *) va_arg (ap, void *) = done; \
847 else \
848 *(short int *) va_arg (ap, void *) = done; \
849 else \
850 if (is_longlong) \
851 *(long long int *) args_value[fspec->data_arg].pa_pointer = done; \
852 else if (is_long) \
853 *(long int *) args_value[fspec->data_arg].pa_pointer = done; \
854 else if (!is_short) \
855 *(int *) args_value[fspec->data_arg].pa_pointer = done; \
856 else \
857 *(short int *) args_value[fspec->data_arg].pa_pointer = done; \
858 break; \
859 \
860 LABEL (form_strerror): \
861 /* Print description of error ERRNO. */ \
862 { \
863 extern char *_strerror_internal __P ((int, char *buf, size_t)); \
864 \
865 string = (char *) \
866 _strerror_internal (save_errno, work_buffer, sizeof work_buffer); \
867 } \
868 is_long = 0; /* This is no wide-char string. */ \
869 goto LABEL (print_string)
870
871
872 /* Sanity check of arguments. */
873 ARGCHECK (s, format);
874
875 if (UNBUFFERED_P (s))
876 /* Use a helper function which will allocate a local temporary buffer
877 for the stream and then call us again. */
878 return buffered_vfprintf (s, format, ap);
879
880 /* Initialize local variables. */
881 done = 0;
882 grouping = (const char *) -1;
883 ap_save = ap;
884 nspecs_done = 0;
885
886 /* Find the first format specifier. */
887 f = lead_str_end = find_spec (format, &mbstate);
888
889 /* Lock stream. */
890 #ifdef USE_IN_LIBIO
891 __libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, s);
892 _IO_flockfile (s);
893 #else
894 __libc_cleanup_region_start ((void (*) (void *)) &__funlockfile, s);
895 __flockfile (s);
896 #endif
897
898 /* Write the literal text before the first format. */
899 outstring ((const UCHAR_T *) format,
900 lead_str_end - (const UCHAR_T *) format);
901
902 /* If we only have to print a simple string, return now. */
903 if (*f == L_('\0'))
904 goto all_done;
905
906 /* Process whole format string. */
907 do
908 {
909 #define REF(Name) &&do_##Name
910 #define LABEL(Name) do_##Name
911 STEP0_3_TABLE;
912 STEP4_TABLE;
913
914 union printf_arg *args_value; /* This is not used here but ... */
915 int is_negative; /* Flag for negative number. */
916 union
917 {
918 unsigned long long int longlong;
919 unsigned long int word;
920 } number;
921 int base;
922 union printf_arg the_arg;
923 char *string; /* Pointer to argument string. */
924 int alt = 0; /* Alternate format. */
925 int space = 0; /* Use space prefix if no sign is needed. */
926 int left = 0; /* Left-justify output. */
927 int showsign = 0; /* Always begin with plus or minus sign. */
928 int group = 0; /* Print numbers according grouping rules. */
929 int is_long_double = 0; /* Argument is long double/ long long int. */
930 int is_short = 0; /* Argument is long int. */
931 int is_long = 0; /* Argument is short int. */
932 int width = 0; /* Width of output; 0 means none specified. */
933 int prec = -1; /* Precision of output; -1 means none specified. */
934 char pad = ' '; /* Padding character. */
935 CHAR_T spec;
936
937 /* Get current character in format string. */
938 JUMP (*++f, step0_jumps);
939
940 /* ' ' flag. */
941 LABEL (flag_space):
942 space = 1;
943 JUMP (*++f, step0_jumps);
944
945 /* '+' flag. */
946 LABEL (flag_plus):
947 showsign = 1;
948 JUMP (*++f, step0_jumps);
949
950 /* The '-' flag. */
951 LABEL (flag_minus):
952 left = 1;
953 pad = L_(' ');
954 JUMP (*++f, step0_jumps);
955
956 /* The '#' flag. */
957 LABEL (flag_hash):
958 alt = 1;
959 JUMP (*++f, step0_jumps);
960
961 /* The '0' flag. */
962 LABEL (flag_zero):
963 if (!left)
964 pad = L_('0');
965 JUMP (*++f, step0_jumps);
966
967 /* The '\'' flag. */
968 LABEL (flag_quote):
969 group = 1;
970
971 /* XXX Completely wrong. Use wctob. */
972 if (grouping == (const char *) -1)
973 {
974 /* Figure out the thousands separator character. */
975 if (mbtowc (&thousands_sep,
976 _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
977 strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
978 thousands_sep = (wchar_t)
979 *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
980 grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
981 if (*grouping == '\0' || *grouping == CHAR_MAX
982 || thousands_sep == L'\0')
983 grouping = NULL;
984 }
985 JUMP (*++f, step0_jumps);
986
987 /* Get width from argument. */
988 LABEL (width_asterics):
989 {
990 const UCHAR_T *tmp; /* Temporary value. */
991
992 tmp = ++f;
993 if (ISDIGIT (*tmp) && read_int (&tmp) && *tmp == L_('$'))
994 /* The width comes from a positional parameter. */
995 goto do_positional;
996
997 width = va_arg (ap, int);
998
999 /* Negative width means left justified. */
1000 if (width < 0)
1001 {
1002 width = -width;
1003 pad = L_(' ');
1004 left = 1;
1005 }
1006 }
1007 JUMP (*f, step1_jumps);
1008
1009 /* Given width in format string. */
1010 LABEL (width):
1011 width = read_int (&f);
1012 if (*f == L_('$'))
1013 /* Oh, oh. The argument comes from a positional parameter. */
1014 goto do_positional;
1015 JUMP (*f, step1_jumps);
1016
1017 LABEL (precision):
1018 ++f;
1019 if (*f == L_('*'))
1020 {
1021 const UCHAR_T *tmp; /* Temporary value. */
1022
1023 tmp = ++f;
1024 if (ISDIGIT (*tmp) && read_int (&tmp) > 0 && *tmp == L_('$'))
1025 /* The precision comes from a positional parameter. */
1026 goto do_positional;
1027
1028 prec = va_arg (ap, int);
1029
1030 /* If the precision is negative the precision is omitted. */
1031 if (prec < 0)
1032 prec = -1;
1033 }
1034 else if (ISDIGIT (*f))
1035 prec = read_int (&f);
1036 else
1037 prec = 0;
1038 JUMP (*f, step2_jumps);
1039
1040 /* Process 'h' modifier. No other modifier is allowed to
1041 follow. */
1042 LABEL (mod_half):
1043 is_short = 1;
1044 JUMP (*++f, step4_jumps);
1045
1046 /* Process 'l' modifier. There might another 'l' follow. */
1047 LABEL (mod_long):
1048 is_long = 1;
1049 JUMP (*++f, step3_jumps);
1050
1051 /* Process 'L', 'q', or 'll' modifier. No other modifier is
1052 allowed to follow. */
1053 LABEL (mod_longlong):
1054 is_long_double = 1;
1055 JUMP (*++f, step4_jumps);
1056
1057 LABEL (mod_size_t):
1058 is_longlong = sizeof (size_t) > sizeof (unsigned long int);
1059 is_long = sizeof (size_t) > sizeof (unsigned int);
1060 JUMP (*++f, step4_jumps);
1061
1062
1063 /* Process current format. */
1064 while (1)
1065 {
1066 process_arg (((struct printf_spec *) NULL));
1067
1068 LABEL (form_unknown):
1069 if (spec == L_('\0'))
1070 {
1071 /* The format string ended before the specifier is complete. */
1072 done = -1;
1073 goto all_done;
1074 }
1075
1076 /* If we are in the fast loop force entering the complicated
1077 one. */
1078 goto do_positional;
1079 }
1080
1081 /* Look for next format specifier. */
1082 f = find_spec ((end_of_spec = ++f), &mbstate);
1083
1084 /* Write the following constant string. */
1085 outstring (end_of_spec, f - end_of_spec);
1086 }
1087 while (*f != L_('\0'));
1088
1089 /* Unlock stream and return. */
1090 goto all_done;
1091
1092 /* Here starts the more complex loop to handle positional parameters. */
1093 do_positional:
1094 {
1095 /* Array with information about the needed arguments. This has to
1096 be dynamically extensible. */
1097 size_t nspecs = 0;
1098 size_t nspecs_max = 32; /* A more or less arbitrary start value. */
1099 struct printf_spec *specs
1100 = alloca (nspecs_max * sizeof (struct printf_spec));
1101
1102 /* The number of arguments the format string requests. This will
1103 determine the size of the array needed to store the argument
1104 attributes. */
1105 size_t nargs = 0;
1106 int *args_type;
1107 union printf_arg *args_value;
1108
1109 /* Positional parameters refer to arguments directly. This could
1110 also determine the maximum number of arguments. Track the
1111 maximum number. */
1112 size_t max_ref_arg = 0;
1113
1114 /* Just a counter. */
1115 size_t cnt;
1116
1117
1118 if (grouping == (const char *) -1)
1119 {
1120 /* XXX Use wctob. But this is incompatible for now. */
1121 /* Figure out the thousands separator character. */
1122 if (mbtowc (&thousands_sep,
1123 _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
1124 strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
1125 thousands_sep = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
1126 grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
1127 if (*grouping == '\0' || *grouping == CHAR_MAX
1128 || thousands_sep == L'\0')
1129 grouping = NULL;
1130 }
1131
1132 for (f = lead_str_end; *f != '\0'; f = specs[nspecs++].next_fmt)
1133 {
1134 if (nspecs >= nspecs_max)
1135 {
1136 /* Extend the array of format specifiers. */
1137 struct printf_spec *old = specs;
1138
1139 nspecs_max *= 2;
1140 specs = alloca (nspecs_max * sizeof (struct printf_spec));
1141
1142 if (specs == &old[nspecs])
1143 /* Stack grows up, OLD was the last thing allocated;
1144 extend it. */
1145 nspecs_max += nspecs_max / 2;
1146 else
1147 {
1148 /* Copy the old array's elements to the new space. */
1149 memcpy (specs, old, nspecs * sizeof (struct printf_spec));
1150 if (old == &specs[nspecs])
1151 /* Stack grows down, OLD was just below the new
1152 SPECS. We can use that space when the new space
1153 runs out. */
1154 nspecs_max += nspecs_max / 2;
1155 }
1156 }
1157
1158 /* Parse the format specifier. */
1159 nargs += parse_one_spec (f, nargs, &specs[nspecs], &max_ref_arg,
1160 &mbstate);
1161 }
1162
1163 /* Determine the number of arguments the format string consumes. */
1164 nargs = MAX (nargs, max_ref_arg);
1165
1166 /* Allocate memory for the argument descriptions. */
1167 args_type = alloca (nargs * sizeof (int));
1168 memset (args_type, 0, nargs * sizeof (int));
1169 args_value = alloca (nargs * sizeof (union printf_arg));
1170
1171 /* XXX Could do sanity check here: If any element in ARGS_TYPE is
1172 still zero after this loop, format is invalid. For now we
1173 simply use 0 as the value. */
1174
1175 /* Fill in the types of all the arguments. */
1176 for (cnt = 0; cnt < nspecs; ++cnt)
1177 {
1178 /* If the width is determined by an argument this is an int. */
1179 if (specs[cnt].width_arg != -1)
1180 args_type[specs[cnt].width_arg] = PA_INT;
1181
1182 /* If the precision is determined by an argument this is an int. */
1183 if (specs[cnt].prec_arg != -1)
1184 args_type[specs[cnt].prec_arg] = PA_INT;
1185
1186 switch (specs[cnt].ndata_args)
1187 {
1188 case 0: /* No arguments. */
1189 break;
1190 case 1: /* One argument; we already have the type. */
1191 args_type[specs[cnt].data_arg] = specs[cnt].data_arg_type;
1192 break;
1193 default:
1194 /* We have more than one argument for this format spec.
1195 We must call the arginfo function again to determine
1196 all the types. */
1197 (void) (*__printf_arginfo_table[specs[cnt].info.spec])
1198 (&specs[cnt].info,
1199 specs[cnt].ndata_args, &args_type[specs[cnt].data_arg]);
1200 break;
1201 }
1202 }
1203
1204 /* Now we know all the types and the order. Fill in the argument
1205 values. */
1206 for (cnt = 0, ap = ap_save; cnt < nargs; ++cnt)
1207 switch (args_type[cnt])
1208 {
1209 #define T(tag, mem, type) \
1210 case tag: \
1211 args_value[cnt].mem = va_arg (ap, type); \
1212 break
1213
1214 T (PA_CHAR, pa_char, int); /* Promoted. */
1215 T (PA_WCHAR, pa_wchar, wint_t);
1216 T (PA_INT|PA_FLAG_SHORT, pa_short_int, int); /* Promoted. */
1217 T (PA_INT, pa_int, int);
1218 T (PA_INT|PA_FLAG_LONG, pa_long_int, long int);
1219 T (PA_INT|PA_FLAG_LONG_LONG, pa_long_long_int, long long int);
1220 T (PA_FLOAT, pa_float, double); /* Promoted. */
1221 T (PA_DOUBLE, pa_double, double);
1222 T (PA_DOUBLE|PA_FLAG_LONG_DOUBLE, pa_long_double, long double);
1223 T (PA_STRING, pa_string, const char *);
1224 T (PA_WSTRING, pa_wstring, const wchar_t *);
1225 T (PA_POINTER, pa_pointer, void *);
1226 #undef T
1227 default:
1228 if ((args_type[cnt] & PA_FLAG_PTR) != 0)
1229 args_value[cnt].pa_pointer = va_arg (ap, void *);
1230 else
1231 args_value[cnt].pa_long_double = 0.0;
1232 break;
1233 }
1234
1235 /* Now walk through all format specifiers and process them. */
1236 for (; (size_t) nspecs_done < nspecs; ++nspecs_done)
1237 {
1238 #undef REF
1239 #define REF(Name) &&do2_##Name
1240 #undef LABEL
1241 #define LABEL(Name) do2_##Name
1242 STEP4_TABLE;
1243
1244 int is_negative;
1245 union
1246 {
1247 unsigned long long int longlong;
1248 unsigned long int word;
1249 } number;
1250 int base;
1251 union printf_arg the_arg;
1252 char *string; /* Pointer to argument string. */
1253
1254 /* Fill variables from values in struct. */
1255 int alt = specs[nspecs_done].info.alt;
1256 int space = specs[nspecs_done].info.space;
1257 int left = specs[nspecs_done].info.left;
1258 int showsign = specs[nspecs_done].info.showsign;
1259 int group = specs[nspecs_done].info.group;
1260 int is_long_double = specs[nspecs_done].info.is_long_double;
1261 int is_short = specs[nspecs_done].info.is_short;
1262 int is_long = specs[nspecs_done].info.is_long;
1263 int width = specs[nspecs_done].info.width;
1264 int prec = specs[nspecs_done].info.prec;
1265 char pad = specs[nspecs_done].info.pad;
1266 CHAR_T spec = specs[nspecs_done].info.spec;
1267
1268 /* Fill in last information. */
1269 if (specs[nspecs_done].width_arg != -1)
1270 {
1271 /* Extract the field width from an argument. */
1272 specs[nspecs_done].info.width =
1273 args_value[specs[nspecs_done].width_arg].pa_int;
1274
1275 if (specs[nspecs_done].info.width < 0)
1276 /* If the width value is negative left justification is
1277 selected and the value is taken as being positive. */
1278 {
1279 specs[nspecs_done].info.width *= -1;
1280 left = specs[nspecs_done].info.left = 1;
1281 }
1282 width = specs[nspecs_done].info.width;
1283 }
1284
1285 if (specs[nspecs_done].prec_arg != -1)
1286 {
1287 /* Extract the precision from an argument. */
1288 specs[nspecs_done].info.prec =
1289 args_value[specs[nspecs_done].prec_arg].pa_int;
1290
1291 if (specs[nspecs_done].info.prec < 0)
1292 /* If the precision is negative the precision is
1293 omitted. */
1294 specs[nspecs_done].info.prec = -1;
1295
1296 prec = specs[nspecs_done].info.prec;
1297 }
1298
1299 /* Process format specifiers. */
1300 while (1)
1301 {
1302 JUMP (spec, step4_jumps);
1303
1304 process_arg ((&specs[nspecs_done]));
1305
1306 LABEL (form_unknown):
1307 {
1308 extern printf_function **__printf_function_table;
1309 int function_done;
1310 printf_function *function;
1311 unsigned int i;
1312 const void **ptr;
1313
1314 function =
1315 (__printf_function_table == NULL ? NULL :
1316 __printf_function_table[specs[nspecs_done].info.spec]);
1317
1318 if (function == NULL)
1319 function = &printf_unknown;
1320
1321 ptr = alloca (specs[nspecs_done].ndata_args
1322 * sizeof (const void *));
1323
1324 /* Fill in an array of pointers to the argument values. */
1325 for (i = 0; i < specs[nspecs_done].ndata_args; ++i)
1326 ptr[i] = &args_value[specs[nspecs_done].data_arg + i];
1327
1328 /* Call the function. */
1329 function_done = (*function) (s, &specs[nspecs_done].info, ptr);
1330
1331 /* If an error occurred we don't have information about #
1332 of chars. */
1333 if (function_done < 0)
1334 {
1335 done = -1;
1336 goto all_done;
1337 }
1338
1339 done += function_done;
1340 }
1341 break;
1342 }
1343
1344 /* Write the following constant string. */
1345 outstring (specs[nspecs_done].end_of_fmt,
1346 specs[nspecs_done].next_fmt
1347 - specs[nspecs_done].end_of_fmt);
1348 }
1349 }
1350
1351 all_done:
1352 /* Unlock the stream. */
1353 __libc_cleanup_region_end (1);
1354
1355 return done;
1356 }
1357
1358 #ifdef USE_IN_LIBIO
1359 # undef vfprintf
1360 # ifdef strong_alias
1361 /* This is for glibc. */
1362 strong_alias (_IO_vfprintf, vfprintf);
1363 # else
1364 # if defined __ELF__ || defined __GNU_LIBRARY__
1365 # include <gnu-stabs.h>
1366 # ifdef weak_alias
1367 weak_alias (_IO_vfprintf, vfprintf);
1368 # endif
1369 # endif
1370 # endif
1371 #endif
1372 \f
1373 /* Handle an unknown format specifier. This prints out a canonicalized
1374 representation of the format spec itself. */
1375 static int
1376 printf_unknown (FILE *s, const struct printf_info *info,
1377 const void *const *args)
1378
1379 {
1380 int done = 0;
1381 char work_buffer[BUFSIZ];
1382 register char *w;
1383
1384 outchar ('%');
1385
1386 if (info->alt)
1387 outchar ('#');
1388 if (info->group)
1389 outchar ('\'');
1390 if (info->showsign)
1391 outchar ('+');
1392 else if (info->space)
1393 outchar (' ');
1394 if (info->left)
1395 outchar ('-');
1396 if (info->pad == '0')
1397 outchar ('0');
1398
1399 if (info->width != 0)
1400 {
1401 w = _itoa_word (info->width, workend + 1, 10, 0);
1402 while (++w <= workend)
1403 outchar (*w);
1404 }
1405
1406 if (info->prec != -1)
1407 {
1408 outchar ('.');
1409 w = _itoa_word (info->prec, workend + 1, 10, 0);
1410 while (++w <= workend)
1411 outchar (*w);
1412 }
1413
1414 if (info->spec != '\0')
1415 outchar (info->spec);
1416
1417 return done;
1418 }
1419 \f
1420 /* Group the digits according to the grouping rules of the current locale.
1421 The interpretation of GROUPING is as in `struct lconv' from <locale.h>. */
1422 static char *
1423 group_number (CHAR_T *w, CHAR_T *rear_ptr, const CHAR_T *grouping,
1424 wchar_t thousands_sep)
1425 {
1426 int len;
1427 char *src, *s;
1428
1429 /* We treat all negative values like CHAR_MAX. */
1430
1431 if (*grouping == CHAR_MAX || *grouping <= 0)
1432 /* No grouping should be done. */
1433 return w;
1434
1435 len = *grouping;
1436
1437 /* Copy existing string so that nothing gets overwritten. */
1438 src = (char *) alloca (rear_ptr - w);
1439 memcpy (src, w + 1, rear_ptr - w);
1440 s = &src[rear_ptr - w - 1];
1441 w = rear_ptr;
1442
1443 /* Process all characters in the string. */
1444 while (s >= src)
1445 {
1446 *w-- = *s--;
1447
1448 if (--len == 0 && s >= src)
1449 {
1450 /* A new group begins. */
1451 *w-- = thousands_sep;
1452
1453 len = *grouping++;
1454 if (*grouping == '\0')
1455 /* The previous grouping repeats ad infinitum. */
1456 --grouping;
1457 else if (*grouping == CHAR_MAX || *grouping < 0)
1458 {
1459 /* No further grouping to be done.
1460 Copy the rest of the number. */
1461 do
1462 *w-- = *s--;
1463 while (s >= src);
1464 break;
1465 }
1466 }
1467 }
1468 return w;
1469 }
1470 \f
1471 #ifdef USE_IN_LIBIO
1472 /* Helper "class" for `fprintf to unbuffered': creates a temporary buffer. */
1473 struct helper_file
1474 {
1475 struct _IO_FILE_plus _f;
1476 _IO_FILE *_put_stream;
1477 #ifdef _IO_MTSAFE_IO
1478 _IO_lock_t lock;
1479 #endif
1480 };
1481
1482 static int
1483 _IO_helper_overflow (_IO_FILE *s, int c)
1484 {
1485 _IO_FILE *target = ((struct helper_file*) s)->_put_stream;
1486 int used = s->_IO_write_ptr - s->_IO_write_base;
1487 if (used)
1488 {
1489 _IO_size_t written = _IO_sputn (target, s->_IO_write_base, used);
1490 s->_IO_write_ptr -= written;
1491 }
1492 return PUTC (c, s);
1493 }
1494
1495 static const struct _IO_jump_t _IO_helper_jumps =
1496 {
1497 JUMP_INIT_DUMMY,
1498 JUMP_INIT (finish, _IO_default_finish),
1499 JUMP_INIT (overflow, _IO_helper_overflow),
1500 JUMP_INIT (underflow, _IO_default_underflow),
1501 JUMP_INIT (uflow, _IO_default_uflow),
1502 JUMP_INIT (pbackfail, _IO_default_pbackfail),
1503 JUMP_INIT (xsputn, _IO_default_xsputn),
1504 JUMP_INIT (xsgetn, _IO_default_xsgetn),
1505 JUMP_INIT (seekoff, _IO_default_seekoff),
1506 JUMP_INIT (seekpos, _IO_default_seekpos),
1507 JUMP_INIT (setbuf, _IO_default_setbuf),
1508 JUMP_INIT (sync, _IO_default_sync),
1509 JUMP_INIT (doallocate, _IO_default_doallocate),
1510 JUMP_INIT (read, _IO_default_read),
1511 JUMP_INIT (write, _IO_default_write),
1512 JUMP_INIT (seek, _IO_default_seek),
1513 JUMP_INIT (close, _IO_default_close),
1514 JUMP_INIT (stat, _IO_default_stat)
1515 };
1516
1517 static int
1518 buffered_vfprintf (register _IO_FILE *s, const CHAR_T *format,
1519 _IO_va_list args)
1520 {
1521 char buf[_IO_BUFSIZ];
1522 struct helper_file helper;
1523 register _IO_FILE *hp = (_IO_FILE *) &helper;
1524 int result, to_flush;
1525
1526 /* Initialize helper. */
1527 helper._put_stream = s;
1528 hp->_IO_write_base = buf;
1529 hp->_IO_write_ptr = buf;
1530 hp->_IO_write_end = buf + sizeof buf;
1531 hp->_IO_file_flags = _IO_MAGIC|_IO_NO_READS;
1532 #ifdef _IO_MTSAFE_IO
1533 hp->_lock = &helper.lock;
1534 __libc_lock_init (*hp->_lock);
1535 #endif
1536 _IO_JUMPS (hp) = (struct _IO_jump_t *) &_IO_helper_jumps;
1537
1538 /* Now print to helper instead. */
1539 result = _IO_vfprintf (hp, format, args);
1540
1541 /* Now flush anything from the helper to the S. */
1542 if ((to_flush = hp->_IO_write_ptr - hp->_IO_write_base) > 0)
1543 {
1544 if ((int) _IO_sputn (s, hp->_IO_write_base, to_flush) != to_flush)
1545 return -1;
1546 }
1547
1548 return result;
1549 }
1550
1551 #else /* !USE_IN_LIBIO */
1552
1553 static int
1554 buffered_vfprintf (register FILE *s, const CHAR_T *format, va_list args)
1555 {
1556 char buf[BUFSIZ];
1557 int result;
1558
1559 s->__bufp = s->__buffer = buf;
1560 s->__bufsize = sizeof buf;
1561 s->__put_limit = s->__buffer + s->__bufsize;
1562 s->__get_limit = s->__buffer;
1563
1564 /* Now use buffer to print. */
1565 result = vfprintf (s, format, args);
1566
1567 if (fflush (s) == EOF)
1568 result = -1;
1569 s->__buffer = s->__bufp = s->__get_limit = s->__put_limit = NULL;
1570 s->__bufsize = 0;
1571
1572 return result;
1573 }
1574 \f
1575 /* Pads string with given number of a specified character.
1576 This code is taken from iopadn.c of the GNU I/O library. */
1577 #define PADSIZE 16
1578 static const CHAR_T blanks[PADSIZE] =
1579 { L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '),
1580 L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' ') };
1581 static const CHAR_T zeroes[PADSIZE] =
1582 { L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'),
1583 L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0') };
1584
1585 ssize_t
1586 #ifndef COMPILE_WPRINTF
1587 __printf_pad (FILE *s, char pad, size_t count)
1588 #else
1589 __wprintf_pad (FILE *s, wchar_t pad, size_t count)
1590 #endif
1591 {
1592 const CHAR_T *padptr;
1593 register size_t i;
1594
1595 padptr = pad == L_(' ') ? blanks : zeroes;
1596
1597 for (i = count; i >= PADSIZE; i -= PADSIZE)
1598 if (PUT (s, padptr, PADSIZE) != PADSIZE)
1599 return -1;
1600 if (i > 0)
1601 if (PUT (s, padptr, i) != i)
1602 return -1;
1603
1604 return count;
1605 }
1606 #undef PADSIZE
1607 #endif /* USE_IN_LIBIO */
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