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Update ChangeLog.old/ChangeLog.23.
[glibc.git] / stdio-common / vfprintf-internal.c
blob3f3d1e148a8e7fdad35fc7bff31314db7b5b7d9d
1 /* Copyright (C) 1991-2021 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 Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the 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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <array_length.h>
19 #include <ctype.h>
20 #include <limits.h>
21 #include <printf.h>
22 #include <stdarg.h>
23 #include <stdint.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <errno.h>
27 #include <wchar.h>
28 #include <libc-lock.h>
29 #include <sys/param.h>
30 #include <_itoa.h>
31 #include <locale/localeinfo.h>
32 #include <stdio.h>
33 #include <scratch_buffer.h>
34 #include <intprops.h>
35
36 /* This code is shared between the standard stdio implementation found
37 in GNU C library and the libio implementation originally found in
38 GNU libg++.
39
40 Beside this it is also shared between the normal and wide character
41 implementation as defined in ISO/IEC 9899:1990/Amendment 1:1995. */
42
43 #include <libioP.h>
44
45 #ifdef COMPILE_WPRINTF
46 #include <wctype.h>
47 #endif
48
49 #define ARGCHECK(S, Format) \
50 do \
51 { \
52 /* Check file argument for consistence. */ \
53 CHECK_FILE (S, -1); \
54 if (S->_flags & _IO_NO_WRITES) \
55 { \
56 S->_flags |= _IO_ERR_SEEN; \
57 __set_errno (EBADF); \
58 return -1; \
59 } \
60 if (Format == NULL) \
61 { \
62 __set_errno (EINVAL); \
63 return -1; \
64 } \
65 } while (0)
66 #define UNBUFFERED_P(S) ((S)->_flags & _IO_UNBUFFERED)
67
68 #if __HAVE_FLOAT128_UNLIKE_LDBL
69 # define PARSE_FLOAT_VA_ARG_EXTENDED(INFO) \
70 do \
71 { \
72 if (is_long_double \
73 && (mode_flags & PRINTF_LDBL_USES_FLOAT128) != 0) \
74 { \
75 INFO.is_binary128 = 1; \
76 the_arg.pa_float128 = va_arg (ap, _Float128); \
77 } \
78 else \
79 { \
80 PARSE_FLOAT_VA_ARG (INFO); \
81 } \
82 } \
83 while (0)
84 #else
85 # define PARSE_FLOAT_VA_ARG_EXTENDED(INFO) \
86 PARSE_FLOAT_VA_ARG (INFO);
87 #endif
88
89 #define PARSE_FLOAT_VA_ARG(INFO) \
90 do \
91 { \
92 INFO.is_binary128 = 0; \
93 if (is_long_double) \
94 the_arg.pa_long_double = va_arg (ap, long double); \
95 else \
96 the_arg.pa_double = va_arg (ap, double); \
97 } \
98 while (0)
99
100 #if __HAVE_FLOAT128_UNLIKE_LDBL
101 # define SETUP_FLOAT128_INFO(INFO) \
102 do \
103 { \
104 if ((mode_flags & PRINTF_LDBL_USES_FLOAT128) != 0) \
105 INFO.is_binary128 = is_long_double; \
106 else \
107 INFO.is_binary128 = 0; \
108 } \
109 while (0)
110 #else
111 # define SETUP_FLOAT128_INFO(INFO) \
112 do \
113 { \
114 INFO.is_binary128 = 0; \
115 } \
116 while (0)
117 #endif
118
119 /* Add LENGTH to DONE. Return the new value of DONE, or -1 on
120 overflow (and set errno accordingly). */
121 static inline int
122 done_add_func (size_t length, int done)
123 {
124 if (done < 0)
125 return done;
126 int ret;
127 if (INT_ADD_WRAPV (done, length, &ret))
128 {
129 __set_errno (EOVERFLOW);
130 return -1;
131 }
132 return ret;
133 }
134
135 #define done_add(val) \
136 do \
137 { \
138 /* Ensure that VAL has a type similar to int. */ \
139 _Static_assert (sizeof (val) == sizeof (int), "value int size"); \
140 _Static_assert ((__typeof__ (val)) -1 < 0, "value signed"); \
141 done = done_add_func ((val), done); \
142 if (done < 0) \
143 goto all_done; \
144 } \
145 while (0)
146
147 #ifndef COMPILE_WPRINTF
148 # define vfprintf __vfprintf_internal
149 # define CHAR_T char
150 # define OTHER_CHAR_T wchar_t
151 # define UCHAR_T unsigned char
152 # define INT_T int
153 typedef const char *THOUSANDS_SEP_T;
154 # define L_(Str) Str
155 # define ISDIGIT(Ch) ((unsigned int) ((Ch) - '0') < 10)
156 # define STR_LEN(Str) strlen (Str)
157
158 # define PUT(F, S, N) _IO_sputn ((F), (S), (N))
159 # define PUTC(C, F) _IO_putc_unlocked (C, F)
160 # define ORIENT if (_IO_vtable_offset (s) == 0 && _IO_fwide (s, -1) != -1)\
161 return -1
162 # define CONVERT_FROM_OTHER_STRING __wcsrtombs
163 #else
164 # define vfprintf __vfwprintf_internal
165 # define CHAR_T wchar_t
166 # define OTHER_CHAR_T char
167 /* This is a hack!!! There should be a type uwchar_t. */
168 # define UCHAR_T unsigned int /* uwchar_t */
169 # define INT_T wint_t
170 typedef wchar_t THOUSANDS_SEP_T;
171 # define L_(Str) L##Str
172 # define ISDIGIT(Ch) ((unsigned int) ((Ch) - L'0') < 10)
173 # define STR_LEN(Str) __wcslen (Str)
174
175 # include <_itowa.h>
176
177 # define PUT(F, S, N) _IO_sputn ((F), (S), (N))
178 # define PUTC(C, F) _IO_putwc_unlocked (C, F)
179 # define ORIENT if (_IO_fwide (s, 1) != 1) return -1
180 # define CONVERT_FROM_OTHER_STRING __mbsrtowcs
181
182 # undef _itoa
183 # define _itoa(Val, Buf, Base, Case) _itowa (Val, Buf, Base, Case)
184 # define _itoa_word(Val, Buf, Base, Case) _itowa_word (Val, Buf, Base, Case)
185 # undef EOF
186 # define EOF WEOF
187 #endif
188
189 static inline int
190 pad_func (FILE *s, CHAR_T padchar, int width, int done)
191 {
192 if (width > 0)
193 {
194 ssize_t written;
195 #ifndef COMPILE_WPRINTF
196 written = _IO_padn (s, padchar, width);
197 #else
198 written = _IO_wpadn (s, padchar, width);
199 #endif
200 if (__glibc_unlikely (written != width))
201 return -1;
202 return done_add_func (width, done);
203 }
204 return done;
205 }
206
207 #define PAD(Padchar) \
208 do \
209 { \
210 done = pad_func (s, (Padchar), width, done); \
211 if (done < 0) \
212 goto all_done; \
213 } \
214 while (0)
215
216 #include "_i18n_number.h"
217
218 /* Include the shared code for parsing the format string. */
219 #include "printf-parse.h"
220
221
222 #define outchar(Ch) \
223 do \
224 { \
225 const INT_T outc = (Ch); \
226 if (PUTC (outc, s) == EOF || done == INT_MAX) \
227 { \
228 done = -1; \
229 goto all_done; \
230 } \
231 ++done; \
232 } \
233 while (0)
234
235 static inline int
236 outstring_func (FILE *s, const UCHAR_T *string, size_t length, int done)
237 {
238 assert ((size_t) done <= (size_t) INT_MAX);
239 if ((size_t) PUT (s, string, length) != (size_t) (length))
240 return -1;
241 return done_add_func (length, done);
242 }
243
244 #define outstring(String, Len) \
245 do \
246 { \
247 const void *string_ = (String); \
248 done = outstring_func (s, string_, (Len), done); \
249 if (done < 0) \
250 goto all_done; \
251 } \
252 while (0)
253
254 /* Write the string SRC to S. If PREC is non-negative, write at most
255 PREC bytes. If LEFT is true, perform left justification. */
256 static int
257 outstring_converted_wide_string (FILE *s, const OTHER_CHAR_T *src, int prec,
258 int width, bool left, int done)
259 {
260 /* Use a small buffer to combine processing of multiple characters.
261 CONVERT_FROM_OTHER_STRING expects the buffer size in (wide)
262 characters, and buf_length counts that. */
263 enum { buf_length = 256 / sizeof (CHAR_T) };
264 CHAR_T buf[buf_length];
265 _Static_assert (sizeof (buf) > MB_LEN_MAX,
266 "buffer is large enough for a single multi-byte character");
267
268 /* Add the initial padding if needed. */
269 if (width > 0 && !left)
270 {
271 /* Make a first pass to find the output width, so that we can
272 add the required padding. */
273 mbstate_t mbstate = { 0 };
274 const OTHER_CHAR_T *src_copy = src;
275 size_t total_written;
276 if (prec < 0)
277 total_written = CONVERT_FROM_OTHER_STRING
278 (NULL, &src_copy, 0, &mbstate);
279 else
280 {
281 /* The source might not be null-terminated. Enforce the
282 limit manually, based on the output length. */
283 total_written = 0;
284 size_t limit = prec;
285 while (limit > 0 && src_copy != NULL)
286 {
287 size_t write_limit = buf_length;
288 if (write_limit > limit)
289 write_limit = limit;
290 size_t written = CONVERT_FROM_OTHER_STRING
291 (buf, &src_copy, write_limit, &mbstate);
292 if (written == (size_t) -1)
293 return -1;
294 if (written == 0)
295 break;
296 total_written += written;
297 limit -= written;
298 }
299 }
300
301 /* Output initial padding. */
302 if (total_written < width)
303 {
304 done = pad_func (s, L_(' '), width - total_written, done);
305 if (done < 0)
306 return done;
307 }
308 }
309
310 /* Convert the input string, piece by piece. */
311 size_t total_written = 0;
312 {
313 mbstate_t mbstate = { 0 };
314 /* If prec is negative, remaining is not decremented, otherwise,
315 it serves as the write limit. */
316 size_t remaining = -1;
317 if (prec >= 0)
318 remaining = prec;
319 while (remaining > 0 && src != NULL)
320 {
321 size_t write_limit = buf_length;
322 if (remaining < write_limit)
323 write_limit = remaining;
324 size_t written = CONVERT_FROM_OTHER_STRING
325 (buf, &src, write_limit, &mbstate);
326 if (written == (size_t) -1)
327 return -1;
328 if (written == 0)
329 break;
330 done = outstring_func (s, (const UCHAR_T *) buf, written, done);
331 if (done < 0)
332 return done;
333 total_written += written;
334 if (prec >= 0)
335 remaining -= written;
336 }
337 }
338
339 /* Add final padding. */
340 if (width > 0 && left && total_written < width)
341 return pad_func (s, L_(' '), width - total_written, done);
342 return done;
343 }
344
345 /* For handling long_double and longlong we use the same flag. If
346 `long' and `long long' are effectively the same type define it to
347 zero. */
348 #if LONG_MAX == LONG_LONG_MAX
349 # define is_longlong 0
350 #else
351 # define is_longlong is_long_double
352 #endif
353
354 /* If `long' and `int' is effectively the same type we don't have to
355 handle `long separately. */
356 #if INT_MAX == LONG_MAX
357 # define is_long_num 0
358 #else
359 # define is_long_num is_long
360 #endif
361
362
363 /* Global constants. */
364 static const CHAR_T null[] = L_("(null)");
365
366 /* Size of the work_buffer variable (in characters, not bytes. */
367 enum { WORK_BUFFER_SIZE = 1000 / sizeof (CHAR_T) };
368
369 /* This table maps a character into a number representing a class. In
370 each step there is a destination label for each class. */
371 static const uint8_t jump_table[] =
372 {
373 /* ' ' */ 1, 0, 0, /* '#' */ 4,
374 0, /* '%' */ 14, 0, /* '\''*/ 6,
375 0, 0, /* '*' */ 7, /* '+' */ 2,
376 0, /* '-' */ 3, /* '.' */ 9, 0,
377 /* '0' */ 5, /* '1' */ 8, /* '2' */ 8, /* '3' */ 8,
378 /* '4' */ 8, /* '5' */ 8, /* '6' */ 8, /* '7' */ 8,
379 /* '8' */ 8, /* '9' */ 8, 0, 0,
380 0, 0, 0, 0,
381 0, /* 'A' */ 26, 0, /* 'C' */ 25,
382 0, /* 'E' */ 19, /* F */ 19, /* 'G' */ 19,
383 0, /* 'I' */ 29, 0, 0,
384 /* 'L' */ 12, 0, 0, 0,
385 0, 0, 0, /* 'S' */ 21,
386 0, 0, 0, 0,
387 /* 'X' */ 18, 0, /* 'Z' */ 13, 0,
388 0, 0, 0, 0,
389 0, /* 'a' */ 26, 0, /* 'c' */ 20,
390 /* 'd' */ 15, /* 'e' */ 19, /* 'f' */ 19, /* 'g' */ 19,
391 /* 'h' */ 10, /* 'i' */ 15, /* 'j' */ 28, 0,
392 /* 'l' */ 11, /* 'm' */ 24, /* 'n' */ 23, /* 'o' */ 17,
393 /* 'p' */ 22, /* 'q' */ 12, 0, /* 's' */ 21,
394 /* 't' */ 27, /* 'u' */ 16, 0, 0,
395 /* 'x' */ 18, 0, /* 'z' */ 13
396 };
397
398 #define NOT_IN_JUMP_RANGE(Ch) ((Ch) < L_(' ') || (Ch) > L_('z'))
399 #define CHAR_CLASS(Ch) (jump_table[(INT_T) (Ch) - L_(' ')])
400 #define LABEL(Name) do_##Name
401 #ifdef SHARED
402 /* 'int' is enough and it saves some space on 64 bit systems. */
403 # define JUMP_TABLE_TYPE const int
404 # define JUMP_TABLE_BASE_LABEL do_form_unknown
405 # define REF(Name) &&do_##Name - &&JUMP_TABLE_BASE_LABEL
406 # define JUMP(ChExpr, table) \
407 do \
408 { \
409 int offset; \
410 void *ptr; \
411 spec = (ChExpr); \
412 offset = NOT_IN_JUMP_RANGE (spec) ? REF (form_unknown) \
413 : table[CHAR_CLASS (spec)]; \
414 ptr = &&JUMP_TABLE_BASE_LABEL + offset; \
415 goto *ptr; \
416 } \
417 while (0)
418 #else
419 # define JUMP_TABLE_TYPE const void *const
420 # define REF(Name) &&do_##Name
421 # define JUMP(ChExpr, table) \
422 do \
423 { \
424 const void *ptr; \
425 spec = (ChExpr); \
426 ptr = NOT_IN_JUMP_RANGE (spec) ? REF (form_unknown) \
427 : table[CHAR_CLASS (spec)]; \
428 goto *ptr; \
429 } \
430 while (0)
431 #endif
432
433 #define STEP0_3_TABLE \
434 /* Step 0: at the beginning. */ \
435 static JUMP_TABLE_TYPE step0_jumps[30] = \
436 { \
437 REF (form_unknown), \
438 REF (flag_space), /* for ' ' */ \
439 REF (flag_plus), /* for '+' */ \
440 REF (flag_minus), /* for '-' */ \
441 REF (flag_hash), /* for '<hash>' */ \
442 REF (flag_zero), /* for '0' */ \
443 REF (flag_quote), /* for '\'' */ \
444 REF (width_asterics), /* for '*' */ \
445 REF (width), /* for '1'...'9' */ \
446 REF (precision), /* for '.' */ \
447 REF (mod_half), /* for 'h' */ \
448 REF (mod_long), /* for 'l' */ \
449 REF (mod_longlong), /* for 'L', 'q' */ \
450 REF (mod_size_t), /* for 'z', 'Z' */ \
451 REF (form_percent), /* for '%' */ \
452 REF (form_integer), /* for 'd', 'i' */ \
453 REF (form_unsigned), /* for 'u' */ \
454 REF (form_octal), /* for 'o' */ \
455 REF (form_hexa), /* for 'X', 'x' */ \
456 REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \
457 REF (form_character), /* for 'c' */ \
458 REF (form_string), /* for 's', 'S' */ \
459 REF (form_pointer), /* for 'p' */ \
460 REF (form_number), /* for 'n' */ \
461 REF (form_strerror), /* for 'm' */ \
462 REF (form_wcharacter), /* for 'C' */ \
463 REF (form_floathex), /* for 'A', 'a' */ \
464 REF (mod_ptrdiff_t), /* for 't' */ \
465 REF (mod_intmax_t), /* for 'j' */ \
466 REF (flag_i18n), /* for 'I' */ \
467 }; \
468 /* Step 1: after processing width. */ \
469 static JUMP_TABLE_TYPE step1_jumps[30] = \
470 { \
471 REF (form_unknown), \
472 REF (form_unknown), /* for ' ' */ \
473 REF (form_unknown), /* for '+' */ \
474 REF (form_unknown), /* for '-' */ \
475 REF (form_unknown), /* for '<hash>' */ \
476 REF (form_unknown), /* for '0' */ \
477 REF (form_unknown), /* for '\'' */ \
478 REF (form_unknown), /* for '*' */ \
479 REF (form_unknown), /* for '1'...'9' */ \
480 REF (precision), /* for '.' */ \
481 REF (mod_half), /* for 'h' */ \
482 REF (mod_long), /* for 'l' */ \
483 REF (mod_longlong), /* for 'L', 'q' */ \
484 REF (mod_size_t), /* for 'z', 'Z' */ \
485 REF (form_percent), /* for '%' */ \
486 REF (form_integer), /* for 'd', 'i' */ \
487 REF (form_unsigned), /* for 'u' */ \
488 REF (form_octal), /* for 'o' */ \
489 REF (form_hexa), /* for 'X', 'x' */ \
490 REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \
491 REF (form_character), /* for 'c' */ \
492 REF (form_string), /* for 's', 'S' */ \
493 REF (form_pointer), /* for 'p' */ \
494 REF (form_number), /* for 'n' */ \
495 REF (form_strerror), /* for 'm' */ \
496 REF (form_wcharacter), /* for 'C' */ \
497 REF (form_floathex), /* for 'A', 'a' */ \
498 REF (mod_ptrdiff_t), /* for 't' */ \
499 REF (mod_intmax_t), /* for 'j' */ \
500 REF (form_unknown) /* for 'I' */ \
501 }; \
502 /* Step 2: after processing precision. */ \
503 static JUMP_TABLE_TYPE step2_jumps[30] = \
504 { \
505 REF (form_unknown), \
506 REF (form_unknown), /* for ' ' */ \
507 REF (form_unknown), /* for '+' */ \
508 REF (form_unknown), /* for '-' */ \
509 REF (form_unknown), /* for '<hash>' */ \
510 REF (form_unknown), /* for '0' */ \
511 REF (form_unknown), /* for '\'' */ \
512 REF (form_unknown), /* for '*' */ \
513 REF (form_unknown), /* for '1'...'9' */ \
514 REF (form_unknown), /* for '.' */ \
515 REF (mod_half), /* for 'h' */ \
516 REF (mod_long), /* for 'l' */ \
517 REF (mod_longlong), /* for 'L', 'q' */ \
518 REF (mod_size_t), /* for 'z', 'Z' */ \
519 REF (form_percent), /* for '%' */ \
520 REF (form_integer), /* for 'd', 'i' */ \
521 REF (form_unsigned), /* for 'u' */ \
522 REF (form_octal), /* for 'o' */ \
523 REF (form_hexa), /* for 'X', 'x' */ \
524 REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \
525 REF (form_character), /* for 'c' */ \
526 REF (form_string), /* for 's', 'S' */ \
527 REF (form_pointer), /* for 'p' */ \
528 REF (form_number), /* for 'n' */ \
529 REF (form_strerror), /* for 'm' */ \
530 REF (form_wcharacter), /* for 'C' */ \
531 REF (form_floathex), /* for 'A', 'a' */ \
532 REF (mod_ptrdiff_t), /* for 't' */ \
533 REF (mod_intmax_t), /* for 'j' */ \
534 REF (form_unknown) /* for 'I' */ \
535 }; \
536 /* Step 3a: after processing first 'h' modifier. */ \
537 static JUMP_TABLE_TYPE step3a_jumps[30] = \
538 { \
539 REF (form_unknown), \
540 REF (form_unknown), /* for ' ' */ \
541 REF (form_unknown), /* for '+' */ \
542 REF (form_unknown), /* for '-' */ \
543 REF (form_unknown), /* for '<hash>' */ \
544 REF (form_unknown), /* for '0' */ \
545 REF (form_unknown), /* for '\'' */ \
546 REF (form_unknown), /* for '*' */ \
547 REF (form_unknown), /* for '1'...'9' */ \
548 REF (form_unknown), /* for '.' */ \
549 REF (mod_halfhalf), /* for 'h' */ \
550 REF (form_unknown), /* for 'l' */ \
551 REF (form_unknown), /* for 'L', 'q' */ \
552 REF (form_unknown), /* for 'z', 'Z' */ \
553 REF (form_percent), /* for '%' */ \
554 REF (form_integer), /* for 'd', 'i' */ \
555 REF (form_unsigned), /* for 'u' */ \
556 REF (form_octal), /* for 'o' */ \
557 REF (form_hexa), /* for 'X', 'x' */ \
558 REF (form_unknown), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \
559 REF (form_unknown), /* for 'c' */ \
560 REF (form_unknown), /* for 's', 'S' */ \
561 REF (form_unknown), /* for 'p' */ \
562 REF (form_number), /* for 'n' */ \
563 REF (form_unknown), /* for 'm' */ \
564 REF (form_unknown), /* for 'C' */ \
565 REF (form_unknown), /* for 'A', 'a' */ \
566 REF (form_unknown), /* for 't' */ \
567 REF (form_unknown), /* for 'j' */ \
568 REF (form_unknown) /* for 'I' */ \
569 }; \
570 /* Step 3b: after processing first 'l' modifier. */ \
571 static JUMP_TABLE_TYPE step3b_jumps[30] = \
572 { \
573 REF (form_unknown), \
574 REF (form_unknown), /* for ' ' */ \
575 REF (form_unknown), /* for '+' */ \
576 REF (form_unknown), /* for '-' */ \
577 REF (form_unknown), /* for '<hash>' */ \
578 REF (form_unknown), /* for '0' */ \
579 REF (form_unknown), /* for '\'' */ \
580 REF (form_unknown), /* for '*' */ \
581 REF (form_unknown), /* for '1'...'9' */ \
582 REF (form_unknown), /* for '.' */ \
583 REF (form_unknown), /* for 'h' */ \
584 REF (mod_longlong), /* for 'l' */ \
585 REF (form_unknown), /* for 'L', 'q' */ \
586 REF (form_unknown), /* for 'z', 'Z' */ \
587 REF (form_percent), /* for '%' */ \
588 REF (form_integer), /* for 'd', 'i' */ \
589 REF (form_unsigned), /* for 'u' */ \
590 REF (form_octal), /* for 'o' */ \
591 REF (form_hexa), /* for 'X', 'x' */ \
592 REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \
593 REF (form_character), /* for 'c' */ \
594 REF (form_string), /* for 's', 'S' */ \
595 REF (form_pointer), /* for 'p' */ \
596 REF (form_number), /* for 'n' */ \
597 REF (form_strerror), /* for 'm' */ \
598 REF (form_wcharacter), /* for 'C' */ \
599 REF (form_floathex), /* for 'A', 'a' */ \
600 REF (form_unknown), /* for 't' */ \
601 REF (form_unknown), /* for 'j' */ \
602 REF (form_unknown) /* for 'I' */ \
603 }
604
605 #define STEP4_TABLE \
606 /* Step 4: processing format specifier. */ \
607 static JUMP_TABLE_TYPE step4_jumps[30] = \
608 { \
609 REF (form_unknown), \
610 REF (form_unknown), /* for ' ' */ \
611 REF (form_unknown), /* for '+' */ \
612 REF (form_unknown), /* for '-' */ \
613 REF (form_unknown), /* for '<hash>' */ \
614 REF (form_unknown), /* for '0' */ \
615 REF (form_unknown), /* for '\'' */ \
616 REF (form_unknown), /* for '*' */ \
617 REF (form_unknown), /* for '1'...'9' */ \
618 REF (form_unknown), /* for '.' */ \
619 REF (form_unknown), /* for 'h' */ \
620 REF (form_unknown), /* for 'l' */ \
621 REF (form_unknown), /* for 'L', 'q' */ \
622 REF (form_unknown), /* for 'z', 'Z' */ \
623 REF (form_percent), /* for '%' */ \
624 REF (form_integer), /* for 'd', 'i' */ \
625 REF (form_unsigned), /* for 'u' */ \
626 REF (form_octal), /* for 'o' */ \
627 REF (form_hexa), /* for 'X', 'x' */ \
628 REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \
629 REF (form_character), /* for 'c' */ \
630 REF (form_string), /* for 's', 'S' */ \
631 REF (form_pointer), /* for 'p' */ \
632 REF (form_number), /* for 'n' */ \
633 REF (form_strerror), /* for 'm' */ \
634 REF (form_wcharacter), /* for 'C' */ \
635 REF (form_floathex), /* for 'A', 'a' */ \
636 REF (form_unknown), /* for 't' */ \
637 REF (form_unknown), /* for 'j' */ \
638 REF (form_unknown) /* for 'I' */ \
639 }
640
641
642 #define process_arg(fspec) \
643 /* Start real work. We know about all flags and modifiers and \
644 now process the wanted format specifier. */ \
645 LABEL (form_percent): \
646 /* Write a literal "%". */ \
647 outchar (L_('%')); \
648 break; \
649 \
650 LABEL (form_integer): \
651 /* Signed decimal integer. */ \
652 base = 10; \
653 \
654 if (is_longlong) \
655 { \
656 long long int signed_number; \
657 \
658 if (fspec == NULL) \
659 signed_number = va_arg (ap, long long int); \
660 else \
661 signed_number = args_value[fspec->data_arg].pa_long_long_int; \
662 \
663 is_negative = signed_number < 0; \
664 number.longlong = is_negative ? (- signed_number) : signed_number; \
665 \
666 goto LABEL (longlong_number); \
667 } \
668 else \
669 { \
670 long int signed_number; \
671 \
672 if (fspec == NULL) \
673 { \
674 if (is_long_num) \
675 signed_number = va_arg (ap, long int); \
676 else if (is_char) \
677 signed_number = (signed char) va_arg (ap, unsigned int); \
678 else if (!is_short) \
679 signed_number = va_arg (ap, int); \
680 else \
681 signed_number = (short int) va_arg (ap, unsigned int); \
682 } \
683 else \
684 if (is_long_num) \
685 signed_number = args_value[fspec->data_arg].pa_long_int; \
686 else if (is_char) \
687 signed_number = (signed char) \
688 args_value[fspec->data_arg].pa_u_int; \
689 else if (!is_short) \
690 signed_number = args_value[fspec->data_arg].pa_int; \
691 else \
692 signed_number = (short int) \
693 args_value[fspec->data_arg].pa_u_int; \
694 \
695 is_negative = signed_number < 0; \
696 number.word = is_negative ? (- signed_number) : signed_number; \
697 \
698 goto LABEL (number); \
699 } \
700 /* NOTREACHED */ \
701 \
702 LABEL (form_unsigned): \
703 /* Unsigned decimal integer. */ \
704 base = 10; \
705 goto LABEL (unsigned_number); \
706 /* NOTREACHED */ \
707 \
708 LABEL (form_octal): \
709 /* Unsigned octal integer. */ \
710 base = 8; \
711 goto LABEL (unsigned_number); \
712 /* NOTREACHED */ \
713 \
714 LABEL (form_hexa): \
715 /* Unsigned hexadecimal integer. */ \
716 base = 16; \
717 \
718 LABEL (unsigned_number): /* Unsigned number of base BASE. */ \
719 \
720 /* ISO specifies the `+' and ` ' flags only for signed \
721 conversions. */ \
722 is_negative = 0; \
723 showsign = 0; \
724 space = 0; \
725 \
726 if (is_longlong) \
727 { \
728 if (fspec == NULL) \
729 number.longlong = va_arg (ap, unsigned long long int); \
730 else \
731 number.longlong = args_value[fspec->data_arg].pa_u_long_long_int; \
732 \
733 LABEL (longlong_number): \
734 if (prec < 0) \
735 /* Supply a default precision if none was given. */ \
736 prec = 1; \
737 else \
738 /* We have to take care for the '0' flag. If a precision \
739 is given it must be ignored. */ \
740 pad = L_(' '); \
741 \
742 /* If the precision is 0 and the number is 0 nothing has to \
743 be written for the number, except for the 'o' format in \
744 alternate form. */ \
745 if (prec == 0 && number.longlong == 0) \
746 { \
747 string = workend; \
748 if (base == 8 && alt) \
749 *--string = L_('0'); \
750 } \
751 else \
752 { \
753 /* Put the number in WORK. */ \
754 string = _itoa (number.longlong, workend, base, \
755 spec == L_('X')); \
756 if (group && grouping) \
757 string = group_number (work_buffer, string, workend, \
758 grouping, thousands_sep); \
759 if (use_outdigits && base == 10) \
760 string = _i18n_number_rewrite (string, workend, workend); \
761 } \
762 /* Simplify further test for num != 0. */ \
763 number.word = number.longlong != 0; \
764 } \
765 else \
766 { \
767 if (fspec == NULL) \
768 { \
769 if (is_long_num) \
770 number.word = va_arg (ap, unsigned long int); \
771 else if (is_char) \
772 number.word = (unsigned char) va_arg (ap, unsigned int); \
773 else if (!is_short) \
774 number.word = va_arg (ap, unsigned int); \
775 else \
776 number.word = (unsigned short int) va_arg (ap, unsigned int); \
777 } \
778 else \
779 if (is_long_num) \
780 number.word = args_value[fspec->data_arg].pa_u_long_int; \
781 else if (is_char) \
782 number.word = (unsigned char) \
783 args_value[fspec->data_arg].pa_u_int; \
784 else if (!is_short) \
785 number.word = args_value[fspec->data_arg].pa_u_int; \
786 else \
787 number.word = (unsigned short int) \
788 args_value[fspec->data_arg].pa_u_int; \
789 \
790 LABEL (number): \
791 if (prec < 0) \
792 /* Supply a default precision if none was given. */ \
793 prec = 1; \
794 else \
795 /* We have to take care for the '0' flag. If a precision \
796 is given it must be ignored. */ \
797 pad = L_(' '); \
798 \
799 /* If the precision is 0 and the number is 0 nothing has to \
800 be written for the number, except for the 'o' format in \
801 alternate form. */ \
802 if (prec == 0 && number.word == 0) \
803 { \
804 string = workend; \
805 if (base == 8 && alt) \
806 *--string = L_('0'); \
807 } \
808 else \
809 { \
810 /* Put the number in WORK. */ \
811 string = _itoa_word (number.word, workend, base, \
812 spec == L_('X')); \
813 if (group && grouping) \
814 string = group_number (work_buffer, string, workend, \
815 grouping, thousands_sep); \
816 if (use_outdigits && base == 10) \
817 string = _i18n_number_rewrite (string, workend, workend); \
818 } \
819 } \
820 \
821 if (prec <= workend - string && number.word != 0 && alt && base == 8) \
822 /* Add octal marker. */ \
823 *--string = L_('0'); \
824 \
825 prec = MAX (0, prec - (workend - string)); \
826 \
827 if (!left) \
828 { \
829 width -= workend - string + prec; \
830 \
831 if (number.word != 0 && alt && base == 16) \
832 /* Account for 0X hex marker. */ \
833 width -= 2; \
834 \
835 if (is_negative || showsign || space) \
836 --width; \
837 \
838 if (pad == L_(' ')) \
839 { \
840 PAD (L_(' ')); \
841 width = 0; \
842 } \
843 \
844 if (is_negative) \
845 outchar (L_('-')); \
846 else if (showsign) \
847 outchar (L_('+')); \
848 else if (space) \
849 outchar (L_(' ')); \
850 \
851 if (number.word != 0 && alt && base == 16) \
852 { \
853 outchar (L_('0')); \
854 outchar (spec); \
855 } \
856 \
857 width += prec; \
858 PAD (L_('0')); \
859 \
860 outstring (string, workend - string); \
861 \
862 break; \
863 } \
864 else \
865 { \
866 if (is_negative) \
867 { \
868 outchar (L_('-')); \
869 --width; \
870 } \
871 else if (showsign) \
872 { \
873 outchar (L_('+')); \
874 --width; \
875 } \
876 else if (space) \
877 { \
878 outchar (L_(' ')); \
879 --width; \
880 } \
881 \
882 if (number.word != 0 && alt && base == 16) \
883 { \
884 outchar (L_('0')); \
885 outchar (spec); \
886 width -= 2; \
887 } \
888 \
889 width -= workend - string + prec; \
890 \
891 if (prec > 0) \
892 { \
893 int temp = width; \
894 width = prec; \
895 PAD (L_('0')); \
896 width = temp; \
897 } \
898 \
899 outstring (string, workend - string); \
900 \
901 PAD (L_(' ')); \
902 break; \
903 } \
904 \
905 LABEL (form_float): \
906 { \
907 /* Floating-point number. This is handled by printf_fp.c. */ \
908 const void *ptr; \
909 int function_done; \
910 \
911 if (fspec == NULL) \
912 { \
913 if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) \
914 is_long_double = 0; \
915 \
916 struct printf_info info = { .prec = prec, \
917 .width = width, \
918 .spec = spec, \
919 .is_long_double = is_long_double, \
920 .is_short = is_short, \
921 .is_long = is_long, \
922 .alt = alt, \
923 .space = space, \
924 .left = left, \
925 .showsign = showsign, \
926 .group = group, \
927 .pad = pad, \
928 .extra = 0, \
929 .i18n = use_outdigits, \
930 .wide = sizeof (CHAR_T) != 1, \
931 .is_binary128 = 0}; \
932 \
933 PARSE_FLOAT_VA_ARG_EXTENDED (info); \
934 ptr = (const void *) &the_arg; \
935 \
936 function_done = __printf_fp (s, &info, &ptr); \
937 } \
938 else \
939 { \
940 ptr = (const void *) &args_value[fspec->data_arg]; \
941 if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) \
942 { \
943 fspec->data_arg_type = PA_DOUBLE; \
944 fspec->info.is_long_double = 0; \
945 } \
946 SETUP_FLOAT128_INFO (fspec->info); \
947 \
948 function_done = __printf_fp (s, &fspec->info, &ptr); \
949 } \
950 \
951 if (function_done < 0) \
952 { \
953 /* Error in print handler; up to handler to set errno. */ \
954 done = -1; \
955 goto all_done; \
956 } \
957 \
958 done_add (function_done); \
959 } \
960 break; \
961 \
962 LABEL (form_floathex): \
963 { \
964 /* Floating point number printed as hexadecimal number. */ \
965 const void *ptr; \
966 int function_done; \
967 \
968 if (fspec == NULL) \
969 { \
970 if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) \
971 is_long_double = 0; \
972 \
973 struct printf_info info = { .prec = prec, \
974 .width = width, \
975 .spec = spec, \
976 .is_long_double = is_long_double, \
977 .is_short = is_short, \
978 .is_long = is_long, \
979 .alt = alt, \
980 .space = space, \
981 .left = left, \
982 .showsign = showsign, \
983 .group = group, \
984 .pad = pad, \
985 .extra = 0, \
986 .wide = sizeof (CHAR_T) != 1, \
987 .is_binary128 = 0}; \
988 \
989 PARSE_FLOAT_VA_ARG_EXTENDED (info); \
990 ptr = (const void *) &the_arg; \
991 \
992 function_done = __printf_fphex (s, &info, &ptr); \
993 } \
994 else \
995 { \
996 ptr = (const void *) &args_value[fspec->data_arg]; \
997 if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) \
998 fspec->info.is_long_double = 0; \
999 SETUP_FLOAT128_INFO (fspec->info); \
1000 \
1001 function_done = __printf_fphex (s, &fspec->info, &ptr); \
1002 } \
1003 \
1004 if (function_done < 0) \
1005 { \
1006 /* Error in print handler; up to handler to set errno. */ \
1007 done = -1; \
1008 goto all_done; \
1009 } \
1010 \
1011 done_add (function_done); \
1012 } \
1013 break; \
1014 \
1015 LABEL (form_pointer): \
1016 /* Generic pointer. */ \
1017 { \
1018 const void *ptr; \
1019 if (fspec == NULL) \
1020 ptr = va_arg (ap, void *); \
1021 else \
1022 ptr = args_value[fspec->data_arg].pa_pointer; \
1023 if (ptr != NULL) \
1024 { \
1025 /* If the pointer is not NULL, write it as a %#x spec. */ \
1026 base = 16; \
1027 number.word = (unsigned long int) ptr; \
1028 is_negative = 0; \
1029 alt = 1; \
1030 group = 0; \
1031 spec = L_('x'); \
1032 goto LABEL (number); \
1033 } \
1034 else \
1035 { \
1036 /* Write "(nil)" for a nil pointer. */ \
1037 string = (CHAR_T *) L_("(nil)"); \
1038 /* Make sure the full string "(nil)" is printed. */ \
1039 if (prec < 5) \
1040 prec = 5; \
1041 /* This is a wide string iff compiling wprintf. */ \
1042 is_long = sizeof (CHAR_T) > 1; \
1043 goto LABEL (print_string); \
1044 } \
1045 } \
1046 /* NOTREACHED */ \
1047 \
1048 LABEL (form_number): \
1049 if ((mode_flags & PRINTF_FORTIFY) != 0) \
1050 { \
1051 if (! readonly_format) \
1052 { \
1053 extern int __readonly_area (const void *, size_t) \
1054 attribute_hidden; \
1055 readonly_format \
1056 = __readonly_area (format, ((STR_LEN (format) + 1) \
1057 * sizeof (CHAR_T))); \
1058 } \
1059 if (readonly_format < 0) \
1060 __libc_fatal ("*** %n in writable segment detected ***\n"); \
1061 } \
1062 /* Answer the count of characters written. */ \
1063 if (fspec == NULL) \
1064 { \
1065 if (is_longlong) \
1066 *(long long int *) va_arg (ap, void *) = done; \
1067 else if (is_long_num) \
1068 *(long int *) va_arg (ap, void *) = done; \
1069 else if (is_char) \
1070 *(char *) va_arg (ap, void *) = done; \
1071 else if (!is_short) \
1072 *(int *) va_arg (ap, void *) = done; \
1073 else \
1074 *(short int *) va_arg (ap, void *) = done; \
1075 } \
1076 else \
1077 if (is_longlong) \
1078 *(long long int *) args_value[fspec->data_arg].pa_pointer = done; \
1079 else if (is_long_num) \
1080 *(long int *) args_value[fspec->data_arg].pa_pointer = done; \
1081 else if (is_char) \
1082 *(char *) args_value[fspec->data_arg].pa_pointer = done; \
1083 else if (!is_short) \
1084 *(int *) args_value[fspec->data_arg].pa_pointer = done; \
1085 else \
1086 *(short int *) args_value[fspec->data_arg].pa_pointer = done; \
1087 break; \
1088 \
1089 LABEL (form_strerror): \
1090 /* Print description of error ERRNO. */ \
1091 string = \
1092 (CHAR_T *) __strerror_r (save_errno, (char *) work_buffer, \
1093 WORK_BUFFER_SIZE * sizeof (CHAR_T)); \
1094 is_long = 0; /* This is no wide-char string. */ \
1095 goto LABEL (print_string)
1096
1097 #ifdef COMPILE_WPRINTF
1098 # define process_string_arg(fspec) \
1099 LABEL (form_character): \
1100 /* Character. */ \
1101 if (is_long) \
1102 goto LABEL (form_wcharacter); \
1103 --width; /* Account for the character itself. */ \
1104 if (!left) \
1105 PAD (L' '); \
1106 if (fspec == NULL) \
1107 outchar (__btowc ((unsigned char) va_arg (ap, int))); /* Promoted. */ \
1108 else \
1109 outchar (__btowc ((unsigned char) \
1110 args_value[fspec->data_arg].pa_int)); \
1111 if (left) \
1112 PAD (L' '); \
1113 break; \
1114 \
1115 LABEL (form_wcharacter): \
1116 { \
1117 /* Wide character. */ \
1118 --width; \
1119 if (!left) \
1120 PAD (L' '); \
1121 if (fspec == NULL) \
1122 outchar (va_arg (ap, wchar_t)); \
1123 else \
1124 outchar (args_value[fspec->data_arg].pa_wchar); \
1125 if (left) \
1126 PAD (L' '); \
1127 } \
1128 break; \
1129 \
1130 LABEL (form_string): \
1131 { \
1132 size_t len; \
1133 \
1134 /* The string argument could in fact be `char *' or `wchar_t *'. \
1135 But this should not make a difference here. */ \
1136 if (fspec == NULL) \
1137 string = (CHAR_T *) va_arg (ap, const wchar_t *); \
1138 else \
1139 string = (CHAR_T *) args_value[fspec->data_arg].pa_wstring; \
1140 \
1141 /* Entry point for printing other strings. */ \
1142 LABEL (print_string): \
1143 \
1144 if (string == NULL) \
1145 { \
1146 /* Write "(null)" if there's space. */ \
1147 if (prec == -1 || prec >= (int) array_length (null) - 1) \
1148 { \
1149 string = (CHAR_T *) null; \
1150 len = array_length (null) - 1; \
1151 } \
1152 else \
1153 { \
1154 string = (CHAR_T *) L""; \
1155 len = 0; \
1156 } \
1157 } \
1158 else if (!is_long && spec != L_('S')) \
1159 { \
1160 done = outstring_converted_wide_string \
1161 (s, (const char *) string, prec, width, left, done); \
1162 if (done < 0) \
1163 goto all_done; \
1164 /* The padding has already been written. */ \
1165 break; \
1166 } \
1167 else \
1168 { \
1169 if (prec != -1) \
1170 /* Search for the end of the string, but don't search past \
1171 the length specified by the precision. */ \
1172 len = __wcsnlen (string, prec); \
1173 else \
1174 len = __wcslen (string); \
1175 } \
1176 \
1177 if ((width -= len) < 0) \
1178 { \
1179 outstring (string, len); \
1180 break; \
1181 } \
1182 \
1183 if (!left) \
1184 PAD (L' '); \
1185 outstring (string, len); \
1186 if (left) \
1187 PAD (L' '); \
1188 } \
1189 break;
1190 #else
1191 # define process_string_arg(fspec) \
1192 LABEL (form_character): \
1193 /* Character. */ \
1194 if (is_long) \
1195 goto LABEL (form_wcharacter); \
1196 --width; /* Account for the character itself. */ \
1197 if (!left) \
1198 PAD (' '); \
1199 if (fspec == NULL) \
1200 outchar ((unsigned char) va_arg (ap, int)); /* Promoted. */ \
1201 else \
1202 outchar ((unsigned char) args_value[fspec->data_arg].pa_int); \
1203 if (left) \
1204 PAD (' '); \
1205 break; \
1206 \
1207 LABEL (form_wcharacter): \
1208 { \
1209 /* Wide character. */ \
1210 char buf[MB_LEN_MAX]; \
1211 mbstate_t mbstate; \
1212 size_t len; \
1213 \
1214 memset (&mbstate, '\0', sizeof (mbstate_t)); \
1215 len = __wcrtomb (buf, (fspec == NULL ? va_arg (ap, wchar_t) \
1216 : args_value[fspec->data_arg].pa_wchar), \
1217 &mbstate); \
1218 if (len == (size_t) -1) \
1219 { \
1220 /* Something went wrong during the conversion. Bail out. */ \
1221 done = -1; \
1222 goto all_done; \
1223 } \
1224 width -= len; \
1225 if (!left) \
1226 PAD (' '); \
1227 outstring (buf, len); \
1228 if (left) \
1229 PAD (' '); \
1230 } \
1231 break; \
1232 \
1233 LABEL (form_string): \
1234 { \
1235 size_t len; \
1236 \
1237 /* The string argument could in fact be `char *' or `wchar_t *'. \
1238 But this should not make a difference here. */ \
1239 if (fspec == NULL) \
1240 string = (char *) va_arg (ap, const char *); \
1241 else \
1242 string = (char *) args_value[fspec->data_arg].pa_string; \
1243 \
1244 /* Entry point for printing other strings. */ \
1245 LABEL (print_string): \
1246 \
1247 if (string == NULL) \
1248 { \
1249 /* Write "(null)" if there's space. */ \
1250 if (prec == -1 || prec >= (int) sizeof (null) - 1) \
1251 { \
1252 string = (char *) null; \
1253 len = sizeof (null) - 1; \
1254 } \
1255 else \
1256 { \
1257 string = (char *) ""; \
1258 len = 0; \
1259 } \
1260 } \
1261 else if (!is_long && spec != L_('S')) \
1262 { \
1263 if (prec != -1) \
1264 /* Search for the end of the string, but don't search past \
1265 the length (in bytes) specified by the precision. */ \
1266 len = __strnlen (string, prec); \
1267 else \
1268 len = strlen (string); \
1269 } \
1270 else \
1271 { \
1272 done = outstring_converted_wide_string \
1273 (s, (const wchar_t *) string, prec, width, left, done); \
1274 if (done < 0) \
1275 goto all_done; \
1276 /* The padding has already been written. */ \
1277 break; \
1278 } \
1279 \
1280 if ((width -= len) < 0) \
1281 { \
1282 outstring (string, len); \
1283 break; \
1284 } \
1285 \
1286 if (!left) \
1287 PAD (' '); \
1288 outstring (string, len); \
1289 if (left) \
1290 PAD (' '); \
1291 } \
1292 break;
1293 #endif
1294
1295 /* Helper function to provide temporary buffering for unbuffered streams. */
1296 static int buffered_vfprintf (FILE *stream, const CHAR_T *fmt, va_list,
1297 unsigned int)
1298 __THROW __attribute__ ((noinline));
1299
1300 /* Handle positional format specifiers. */
1301 static int printf_positional (FILE *s,
1302 const CHAR_T *format, int readonly_format,
1303 va_list ap, va_list *ap_savep, int done,
1304 int nspecs_done, const UCHAR_T *lead_str_end,
1305 CHAR_T *work_buffer, int save_errno,
1306 const char *grouping,
1307 THOUSANDS_SEP_T thousands_sep,
1308 unsigned int mode_flags);
1309
1310 /* Handle unknown format specifier. */
1311 static int printf_unknown (FILE *, const struct printf_info *,
1312 const void *const *) __THROW;
1313
1314 /* Group digits of number string. */
1315 static CHAR_T *group_number (CHAR_T *, CHAR_T *, CHAR_T *, const char *,
1316 THOUSANDS_SEP_T);
1317
1318 /* The function itself. */
1319 int
1320 vfprintf (FILE *s, const CHAR_T *format, va_list ap, unsigned int mode_flags)
1321 {
1322 /* The character used as thousands separator. */
1323 THOUSANDS_SEP_T thousands_sep = 0;
1324
1325 /* The string describing the size of groups of digits. */
1326 const char *grouping;
1327
1328 /* Place to accumulate the result. */
1329 int done;
1330
1331 /* Current character in format string. */
1332 const UCHAR_T *f;
1333
1334 /* End of leading constant string. */
1335 const UCHAR_T *lead_str_end;
1336
1337 /* Points to next format specifier. */
1338 const UCHAR_T *end_of_spec;
1339
1340 /* Buffer intermediate results. */
1341 CHAR_T work_buffer[WORK_BUFFER_SIZE];
1342 CHAR_T *workend;
1343
1344 /* We have to save the original argument pointer. */
1345 va_list ap_save;
1346
1347 /* Count number of specifiers we already processed. */
1348 int nspecs_done;
1349
1350 /* For the %m format we may need the current `errno' value. */
1351 int save_errno = errno;
1352
1353 /* 1 if format is in read-only memory, -1 if it is in writable memory,
1354 0 if unknown. */
1355 int readonly_format = 0;
1356
1357 /* Orient the stream. */
1358 #ifdef ORIENT
1359 ORIENT;
1360 #endif
1361
1362 /* Sanity check of arguments. */
1363 ARGCHECK (s, format);
1364
1365 #ifdef ORIENT
1366 /* Check for correct orientation. */
1367 if (_IO_vtable_offset (s) == 0
1368 && _IO_fwide (s, sizeof (CHAR_T) == 1 ? -1 : 1)
1369 != (sizeof (CHAR_T) == 1 ? -1 : 1))
1370 /* The stream is already oriented otherwise. */
1371 return EOF;
1372 #endif
1373
1374 if (UNBUFFERED_P (s))
1375 /* Use a helper function which will allocate a local temporary buffer
1376 for the stream and then call us again. */
1377 return buffered_vfprintf (s, format, ap, mode_flags);
1378
1379 /* Initialize local variables. */
1380 done = 0;
1381 grouping = (const char *) -1;
1382 #ifdef __va_copy
1383 /* This macro will be available soon in gcc's <stdarg.h>. We need it
1384 since on some systems `va_list' is not an integral type. */
1385 __va_copy (ap_save, ap);
1386 #else
1387 ap_save = ap;
1388 #endif
1389 nspecs_done = 0;
1390
1391 #ifdef COMPILE_WPRINTF
1392 /* Find the first format specifier. */
1393 f = lead_str_end = __find_specwc ((const UCHAR_T *) format);
1394 #else
1395 /* Find the first format specifier. */
1396 f = lead_str_end = __find_specmb ((const UCHAR_T *) format);
1397 #endif
1398
1399 /* Lock stream. */
1400 _IO_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, s);
1401 _IO_flockfile (s);
1402
1403 /* Write the literal text before the first format. */
1404 outstring ((const UCHAR_T *) format,
1405 lead_str_end - (const UCHAR_T *) format);
1406
1407 /* If we only have to print a simple string, return now. */
1408 if (*f == L_('\0'))
1409 goto all_done;
1410
1411 /* Use the slow path in case any printf handler is registered. */
1412 if (__glibc_unlikely (__printf_function_table != NULL
1413 || __printf_modifier_table != NULL
1414 || __printf_va_arg_table != NULL))
1415 goto do_positional;
1416
1417 /* Process whole format string. */
1418 do
1419 {
1420 STEP0_3_TABLE;
1421 STEP4_TABLE;
1422
1423 union printf_arg *args_value; /* This is not used here but ... */
1424 int is_negative; /* Flag for negative number. */
1425 union
1426 {
1427 unsigned long long int longlong;
1428 unsigned long int word;
1429 } number;
1430 int base;
1431 union printf_arg the_arg;
1432 CHAR_T *string; /* Pointer to argument string. */
1433 int alt = 0; /* Alternate format. */
1434 int space = 0; /* Use space prefix if no sign is needed. */
1435 int left = 0; /* Left-justify output. */
1436 int showsign = 0; /* Always begin with plus or minus sign. */
1437 int group = 0; /* Print numbers according grouping rules. */
1438 int is_long_double = 0; /* Argument is long double/ long long int. */
1439 int is_short = 0; /* Argument is short int. */
1440 int is_long = 0; /* Argument is long int. */
1441 int is_char = 0; /* Argument is promoted (unsigned) char. */
1442 int width = 0; /* Width of output; 0 means none specified. */
1443 int prec = -1; /* Precision of output; -1 means none specified. */
1444 /* This flag is set by the 'I' modifier and selects the use of the
1445 `outdigits' as determined by the current locale. */
1446 int use_outdigits = 0;
1447 UCHAR_T pad = L_(' ');/* Padding character. */
1448 CHAR_T spec;
1449
1450 workend = work_buffer + WORK_BUFFER_SIZE;
1451
1452 /* Get current character in format string. */
1453 JUMP (*++f, step0_jumps);
1454
1455 /* ' ' flag. */
1456 LABEL (flag_space):
1457 space = 1;
1458 JUMP (*++f, step0_jumps);
1459
1460 /* '+' flag. */
1461 LABEL (flag_plus):
1462 showsign = 1;
1463 JUMP (*++f, step0_jumps);
1464
1465 /* The '-' flag. */
1466 LABEL (flag_minus):
1467 left = 1;
1468 pad = L_(' ');
1469 JUMP (*++f, step0_jumps);
1470
1471 /* The '#' flag. */
1472 LABEL (flag_hash):
1473 alt = 1;
1474 JUMP (*++f, step0_jumps);
1475
1476 /* The '0' flag. */
1477 LABEL (flag_zero):
1478 if (!left)
1479 pad = L_('0');
1480 JUMP (*++f, step0_jumps);
1481
1482 /* The '\'' flag. */
1483 LABEL (flag_quote):
1484 group = 1;
1485
1486 if (grouping == (const char *) -1)
1487 {
1488 #ifdef COMPILE_WPRINTF
1489 thousands_sep = _NL_CURRENT_WORD (LC_NUMERIC,
1490 _NL_NUMERIC_THOUSANDS_SEP_WC);
1491 #else
1492 thousands_sep = _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
1493 #endif
1494
1495 grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
1496 if (*grouping == '\0' || *grouping == CHAR_MAX
1497 #ifdef COMPILE_WPRINTF
1498 || thousands_sep == L'\0'
1499 #else
1500 || *thousands_sep == '\0'
1501 #endif
1502 )
1503 grouping = NULL;
1504 }
1505 JUMP (*++f, step0_jumps);
1506
1507 LABEL (flag_i18n):
1508 use_outdigits = 1;
1509 JUMP (*++f, step0_jumps);
1510
1511 /* Get width from argument. */
1512 LABEL (width_asterics):
1513 {
1514 const UCHAR_T *tmp; /* Temporary value. */
1515
1516 tmp = ++f;
1517 if (ISDIGIT (*tmp))
1518 {
1519 int pos = read_int (&tmp);
1520
1521 if (pos == -1)
1522 {
1523 __set_errno (EOVERFLOW);
1524 done = -1;
1525 goto all_done;
1526 }
1527
1528 if (pos && *tmp == L_('$'))
1529 /* The width comes from a positional parameter. */
1530 goto do_positional;
1531 }
1532 width = va_arg (ap, int);
1533
1534 /* Negative width means left justified. */
1535 if (width < 0)
1536 {
1537 width = -width;
1538 pad = L_(' ');
1539 left = 1;
1540 }
1541 }
1542 JUMP (*f, step1_jumps);
1543
1544 /* Given width in format string. */
1545 LABEL (width):
1546 width = read_int (&f);
1547
1548 if (__glibc_unlikely (width == -1))
1549 {
1550 __set_errno (EOVERFLOW);
1551 done = -1;
1552 goto all_done;
1553 }
1554
1555 if (*f == L_('$'))
1556 /* Oh, oh. The argument comes from a positional parameter. */
1557 goto do_positional;
1558 JUMP (*f, step1_jumps);
1559
1560 LABEL (precision):
1561 ++f;
1562 if (*f == L_('*'))
1563 {
1564 const UCHAR_T *tmp; /* Temporary value. */
1565
1566 tmp = ++f;
1567 if (ISDIGIT (*tmp))
1568 {
1569 int pos = read_int (&tmp);
1570
1571 if (pos == -1)
1572 {
1573 __set_errno (EOVERFLOW);
1574 done = -1;
1575 goto all_done;
1576 }
1577
1578 if (pos && *tmp == L_('$'))
1579 /* The precision comes from a positional parameter. */
1580 goto do_positional;
1581 }
1582 prec = va_arg (ap, int);
1583
1584 /* If the precision is negative the precision is omitted. */
1585 if (prec < 0)
1586 prec = -1;
1587 }
1588 else if (ISDIGIT (*f))
1589 {
1590 prec = read_int (&f);
1591
1592 /* The precision was specified in this case as an extremely
1593 large positive value. */
1594 if (prec == -1)
1595 {
1596 __set_errno (EOVERFLOW);
1597 done = -1;
1598 goto all_done;
1599 }
1600 }
1601 else
1602 prec = 0;
1603 JUMP (*f, step2_jumps);
1604
1605 /* Process 'h' modifier. There might another 'h' following. */
1606 LABEL (mod_half):
1607 is_short = 1;
1608 JUMP (*++f, step3a_jumps);
1609
1610 /* Process 'hh' modifier. */
1611 LABEL (mod_halfhalf):
1612 is_short = 0;
1613 is_char = 1;
1614 JUMP (*++f, step4_jumps);
1615
1616 /* Process 'l' modifier. There might another 'l' following. */
1617 LABEL (mod_long):
1618 is_long = 1;
1619 JUMP (*++f, step3b_jumps);
1620
1621 /* Process 'L', 'q', or 'll' modifier. No other modifier is
1622 allowed to follow. */
1623 LABEL (mod_longlong):
1624 is_long_double = 1;
1625 is_long = 1;
1626 JUMP (*++f, step4_jumps);
1627
1628 LABEL (mod_size_t):
1629 is_long_double = sizeof (size_t) > sizeof (unsigned long int);
1630 is_long = sizeof (size_t) > sizeof (unsigned int);
1631 JUMP (*++f, step4_jumps);
1632
1633 LABEL (mod_ptrdiff_t):
1634 is_long_double = sizeof (ptrdiff_t) > sizeof (unsigned long int);
1635 is_long = sizeof (ptrdiff_t) > sizeof (unsigned int);
1636 JUMP (*++f, step4_jumps);
1637
1638 LABEL (mod_intmax_t):
1639 is_long_double = sizeof (intmax_t) > sizeof (unsigned long int);
1640 is_long = sizeof (intmax_t) > sizeof (unsigned int);
1641 JUMP (*++f, step4_jumps);
1642
1643 /* Process current format. */
1644 while (1)
1645 {
1646 process_arg (((struct printf_spec *) NULL));
1647 process_string_arg (((struct printf_spec *) NULL));
1648
1649 LABEL (form_unknown):
1650 if (spec == L_('\0'))
1651 {
1652 /* The format string ended before the specifier is complete. */
1653 __set_errno (EINVAL);
1654 done = -1;
1655 goto all_done;
1656 }
1657
1658 /* If we are in the fast loop force entering the complicated
1659 one. */
1660 goto do_positional;
1661 }
1662
1663 /* The format is correctly handled. */
1664 ++nspecs_done;
1665
1666 /* Look for next format specifier. */
1667 #ifdef COMPILE_WPRINTF
1668 f = __find_specwc ((end_of_spec = ++f));
1669 #else
1670 f = __find_specmb ((end_of_spec = ++f));
1671 #endif
1672
1673 /* Write the following constant string. */
1674 outstring (end_of_spec, f - end_of_spec);
1675 }
1676 while (*f != L_('\0'));
1677
1678 /* Unlock stream and return. */
1679 goto all_done;
1680
1681 /* Hand off processing for positional parameters. */
1682 do_positional:
1683 done = printf_positional (s, format, readonly_format, ap, &ap_save,
1684 done, nspecs_done, lead_str_end, work_buffer,
1685 save_errno, grouping, thousands_sep, mode_flags);
1686
1687 all_done:
1688 /* Unlock the stream. */
1689 _IO_funlockfile (s);
1690 _IO_cleanup_region_end (0);
1691
1692 return done;
1693 }
1694 \f
1695 static int
1696 printf_positional (FILE *s, const CHAR_T *format, int readonly_format,
1697 va_list ap, va_list *ap_savep, int done, int nspecs_done,
1698 const UCHAR_T *lead_str_end,
1699 CHAR_T *work_buffer, int save_errno,
1700 const char *grouping, THOUSANDS_SEP_T thousands_sep,
1701 unsigned int mode_flags)
1702 {
1703 /* For positional argument handling. */
1704 struct scratch_buffer specsbuf;
1705 scratch_buffer_init (&specsbuf);
1706 struct printf_spec *specs = specsbuf.data;
1707 size_t specs_limit = specsbuf.length / sizeof (specs[0]);
1708
1709 /* Used as a backing store for args_value, args_size, args_type
1710 below. */
1711 struct scratch_buffer argsbuf;
1712 scratch_buffer_init (&argsbuf);
1713
1714 /* Array with information about the needed arguments. This has to
1715 be dynamically extensible. */
1716 size_t nspecs = 0;
1717
1718 /* The number of arguments the format string requests. This will
1719 determine the size of the array needed to store the argument
1720 attributes. */
1721 size_t nargs = 0;
1722
1723 /* Positional parameters refer to arguments directly. This could
1724 also determine the maximum number of arguments. Track the
1725 maximum number. */
1726 size_t max_ref_arg = 0;
1727
1728 /* Just a counter. */
1729 size_t cnt;
1730
1731 if (grouping == (const char *) -1)
1732 {
1733 #ifdef COMPILE_WPRINTF
1734 thousands_sep = _NL_CURRENT_WORD (LC_NUMERIC,
1735 _NL_NUMERIC_THOUSANDS_SEP_WC);
1736 #else
1737 thousands_sep = _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
1738 #endif
1739
1740 grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
1741 if (*grouping == '\0' || *grouping == CHAR_MAX)
1742 grouping = NULL;
1743 }
1744
1745 for (const UCHAR_T *f = lead_str_end; *f != L_('\0');
1746 f = specs[nspecs++].next_fmt)
1747 {
1748 if (nspecs == specs_limit)
1749 {
1750 if (!scratch_buffer_grow_preserve (&specsbuf))
1751 {
1752 done = -1;
1753 goto all_done;
1754 }
1755 specs = specsbuf.data;
1756 specs_limit = specsbuf.length / sizeof (specs[0]);
1757 }
1758
1759 /* Parse the format specifier. */
1760 #ifdef COMPILE_WPRINTF
1761 nargs += __parse_one_specwc (f, nargs, &specs[nspecs], &max_ref_arg);
1762 #else
1763 nargs += __parse_one_specmb (f, nargs, &specs[nspecs], &max_ref_arg);
1764 #endif
1765 }
1766
1767 /* Determine the number of arguments the format string consumes. */
1768 nargs = MAX (nargs, max_ref_arg);
1769
1770 union printf_arg *args_value;
1771 int *args_size;
1772 int *args_type;
1773 {
1774 /* Calculate total size needed to represent a single argument
1775 across all three argument-related arrays. */
1776 size_t bytes_per_arg
1777 = sizeof (*args_value) + sizeof (*args_size) + sizeof (*args_type);
1778 if (!scratch_buffer_set_array_size (&argsbuf, nargs, bytes_per_arg))
1779 {
1780 done = -1;
1781 goto all_done;
1782 }
1783 args_value = argsbuf.data;
1784 /* Set up the remaining two arrays to each point past the end of
1785 the prior array, since space for all three has been allocated
1786 now. */
1787 args_size = &args_value[nargs].pa_int;
1788 args_type = &args_size[nargs];
1789 memset (args_type, (mode_flags & PRINTF_FORTIFY) != 0 ? '\xff' : '\0',
1790 nargs * sizeof (*args_type));
1791 }
1792
1793 /* XXX Could do sanity check here: If any element in ARGS_TYPE is
1794 still zero after this loop, format is invalid. For now we
1795 simply use 0 as the value. */
1796
1797 /* Fill in the types of all the arguments. */
1798 for (cnt = 0; cnt < nspecs; ++cnt)
1799 {
1800 /* If the width is determined by an argument this is an int. */
1801 if (specs[cnt].width_arg != -1)
1802 args_type[specs[cnt].width_arg] = PA_INT;
1803
1804 /* If the precision is determined by an argument this is an int. */
1805 if (specs[cnt].prec_arg != -1)
1806 args_type[specs[cnt].prec_arg] = PA_INT;
1807
1808 switch (specs[cnt].ndata_args)
1809 {
1810 case 0: /* No arguments. */
1811 break;
1812 case 1: /* One argument; we already have the
1813 type and size. */
1814 args_type[specs[cnt].data_arg] = specs[cnt].data_arg_type;
1815 args_size[specs[cnt].data_arg] = specs[cnt].size;
1816 break;
1817 default:
1818 /* We have more than one argument for this format spec.
1819 We must call the arginfo function again to determine
1820 all the types. */
1821 (void) (*__printf_arginfo_table[specs[cnt].info.spec])
1822 (&specs[cnt].info,
1823 specs[cnt].ndata_args, &args_type[specs[cnt].data_arg],
1824 &args_size[specs[cnt].data_arg]);
1825 break;
1826 }
1827 }
1828
1829 /* Now we know all the types and the order. Fill in the argument
1830 values. */
1831 for (cnt = 0; cnt < nargs; ++cnt)
1832 switch (args_type[cnt])
1833 {
1834 #define T(tag, mem, type) \
1835 case tag: \
1836 args_value[cnt].mem = va_arg (*ap_savep, type); \
1837 break
1838
1839 T (PA_WCHAR, pa_wchar, wint_t);
1840 case PA_CHAR: /* Promoted. */
1841 case PA_INT|PA_FLAG_SHORT: /* Promoted. */
1842 #if LONG_MAX == INT_MAX
1843 case PA_INT|PA_FLAG_LONG:
1844 #endif
1845 T (PA_INT, pa_int, int);
1846 #if LONG_MAX == LONG_LONG_MAX
1847 case PA_INT|PA_FLAG_LONG:
1848 #endif
1849 T (PA_INT|PA_FLAG_LONG_LONG, pa_long_long_int, long long int);
1850 #if LONG_MAX != INT_MAX && LONG_MAX != LONG_LONG_MAX
1851 # error "he?"
1852 #endif
1853 case PA_FLOAT: /* Promoted. */
1854 T (PA_DOUBLE, pa_double, double);
1855 case PA_DOUBLE|PA_FLAG_LONG_DOUBLE:
1856 if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0))
1857 {
1858 args_value[cnt].pa_double = va_arg (*ap_savep, double);
1859 args_type[cnt] &= ~PA_FLAG_LONG_DOUBLE;
1860 }
1861 #if __HAVE_FLOAT128_UNLIKE_LDBL
1862 else if ((mode_flags & PRINTF_LDBL_USES_FLOAT128) != 0)
1863 args_value[cnt].pa_float128 = va_arg (*ap_savep, _Float128);
1864 #endif
1865 else
1866 args_value[cnt].pa_long_double = va_arg (*ap_savep, long double);
1867 break;
1868 case PA_STRING: /* All pointers are the same */
1869 case PA_WSTRING: /* All pointers are the same */
1870 T (PA_POINTER, pa_pointer, void *);
1871 #undef T
1872 default:
1873 if ((args_type[cnt] & PA_FLAG_PTR) != 0)
1874 args_value[cnt].pa_pointer = va_arg (*ap_savep, void *);
1875 else if (__glibc_unlikely (__printf_va_arg_table != NULL)
1876 && __printf_va_arg_table[args_type[cnt] - PA_LAST] != NULL)
1877 {
1878 args_value[cnt].pa_user = alloca (args_size[cnt]);
1879 (*__printf_va_arg_table[args_type[cnt] - PA_LAST])
1880 (args_value[cnt].pa_user, ap_savep);
1881 }
1882 else
1883 memset (&args_value[cnt], 0, sizeof (args_value[cnt]));
1884 break;
1885 case -1:
1886 /* Error case. Not all parameters appear in N$ format
1887 strings. We have no way to determine their type. */
1888 assert ((mode_flags & PRINTF_FORTIFY) != 0);
1889 __libc_fatal ("*** invalid %N$ use detected ***\n");
1890 }
1891
1892 /* Now walk through all format specifiers and process them. */
1893 for (; (size_t) nspecs_done < nspecs; ++nspecs_done)
1894 {
1895 STEP4_TABLE;
1896
1897 int is_negative;
1898 union
1899 {
1900 unsigned long long int longlong;
1901 unsigned long int word;
1902 } number;
1903 int base;
1904 union printf_arg the_arg;
1905 CHAR_T *string; /* Pointer to argument string. */
1906
1907 /* Fill variables from values in struct. */
1908 int alt = specs[nspecs_done].info.alt;
1909 int space = specs[nspecs_done].info.space;
1910 int left = specs[nspecs_done].info.left;
1911 int showsign = specs[nspecs_done].info.showsign;
1912 int group = specs[nspecs_done].info.group;
1913 int is_long_double = specs[nspecs_done].info.is_long_double;
1914 int is_short = specs[nspecs_done].info.is_short;
1915 int is_char = specs[nspecs_done].info.is_char;
1916 int is_long = specs[nspecs_done].info.is_long;
1917 int width = specs[nspecs_done].info.width;
1918 int prec = specs[nspecs_done].info.prec;
1919 int use_outdigits = specs[nspecs_done].info.i18n;
1920 char pad = specs[nspecs_done].info.pad;
1921 CHAR_T spec = specs[nspecs_done].info.spec;
1922
1923 CHAR_T *workend = work_buffer + WORK_BUFFER_SIZE;
1924
1925 /* Fill in last information. */
1926 if (specs[nspecs_done].width_arg != -1)
1927 {
1928 /* Extract the field width from an argument. */
1929 specs[nspecs_done].info.width =
1930 args_value[specs[nspecs_done].width_arg].pa_int;
1931
1932 if (specs[nspecs_done].info.width < 0)
1933 /* If the width value is negative left justification is
1934 selected and the value is taken as being positive. */
1935 {
1936 specs[nspecs_done].info.width *= -1;
1937 left = specs[nspecs_done].info.left = 1;
1938 }
1939 width = specs[nspecs_done].info.width;
1940 }
1941
1942 if (specs[nspecs_done].prec_arg != -1)
1943 {
1944 /* Extract the precision from an argument. */
1945 specs[nspecs_done].info.prec =
1946 args_value[specs[nspecs_done].prec_arg].pa_int;
1947
1948 if (specs[nspecs_done].info.prec < 0)
1949 /* If the precision is negative the precision is
1950 omitted. */
1951 specs[nspecs_done].info.prec = -1;
1952
1953 prec = specs[nspecs_done].info.prec;
1954 }
1955
1956 /* Process format specifiers. */
1957 while (1)
1958 {
1959 extern printf_function **__printf_function_table;
1960 int function_done;
1961
1962 if (spec <= UCHAR_MAX
1963 && __printf_function_table != NULL
1964 && __printf_function_table[(size_t) spec] != NULL)
1965 {
1966 const void **ptr = alloca (specs[nspecs_done].ndata_args
1967 * sizeof (const void *));
1968
1969 /* Fill in an array of pointers to the argument values. */
1970 for (unsigned int i = 0; i < specs[nspecs_done].ndata_args;
1971 ++i)
1972 ptr[i] = &args_value[specs[nspecs_done].data_arg + i];
1973
1974 /* Call the function. */
1975 function_done = __printf_function_table[(size_t) spec]
1976 (s, &specs[nspecs_done].info, ptr);
1977
1978 if (function_done != -2)
1979 {
1980 /* If an error occurred we don't have information
1981 about # of chars. */
1982 if (function_done < 0)
1983 {
1984 /* Function has set errno. */
1985 done = -1;
1986 goto all_done;
1987 }
1988
1989 done_add (function_done);
1990 break;
1991 }
1992 }
1993
1994 JUMP (spec, step4_jumps);
1995
1996 process_arg ((&specs[nspecs_done]));
1997 process_string_arg ((&specs[nspecs_done]));
1998
1999 LABEL (form_unknown):
2000 {
2001 unsigned int i;
2002 const void **ptr;
2003
2004 ptr = alloca (specs[nspecs_done].ndata_args
2005 * sizeof (const void *));
2006
2007 /* Fill in an array of pointers to the argument values. */
2008 for (i = 0; i < specs[nspecs_done].ndata_args; ++i)
2009 ptr[i] = &args_value[specs[nspecs_done].data_arg + i];
2010
2011 /* Call the function. */
2012 function_done = printf_unknown (s, &specs[nspecs_done].info,
2013 ptr);
2014
2015 /* If an error occurred we don't have information about #
2016 of chars. */
2017 if (function_done < 0)
2018 {
2019 /* Function has set errno. */
2020 done = -1;
2021 goto all_done;
2022 }
2023
2024 done_add (function_done);
2025 }
2026 break;
2027 }
2028
2029 /* Write the following constant string. */
2030 outstring (specs[nspecs_done].end_of_fmt,
2031 specs[nspecs_done].next_fmt
2032 - specs[nspecs_done].end_of_fmt);
2033 }
2034 all_done:
2035 scratch_buffer_free (&argsbuf);
2036 scratch_buffer_free (&specsbuf);
2037 return done;
2038 }
2039 \f
2040 /* Handle an unknown format specifier. This prints out a canonicalized
2041 representation of the format spec itself. */
2042 static int
2043 printf_unknown (FILE *s, const struct printf_info *info,
2044 const void *const *args)
2045
2046 {
2047 int done = 0;
2048 CHAR_T work_buffer[MAX (sizeof (info->width), sizeof (info->prec)) * 3];
2049 CHAR_T *const workend
2050 = &work_buffer[sizeof (work_buffer) / sizeof (CHAR_T)];
2051 CHAR_T *w;
2052
2053 outchar (L_('%'));
2054
2055 if (info->alt)
2056 outchar (L_('#'));
2057 if (info->group)
2058 outchar (L_('\''));
2059 if (info->showsign)
2060 outchar (L_('+'));
2061 else if (info->space)
2062 outchar (L_(' '));
2063 if (info->left)
2064 outchar (L_('-'));
2065 if (info->pad == L_('0'))
2066 outchar (L_('0'));
2067 if (info->i18n)
2068 outchar (L_('I'));
2069
2070 if (info->width != 0)
2071 {
2072 w = _itoa_word (info->width, workend, 10, 0);
2073 while (w < workend)
2074 outchar (*w++);
2075 }
2076
2077 if (info->prec != -1)
2078 {
2079 outchar (L_('.'));
2080 w = _itoa_word (info->prec, workend, 10, 0);
2081 while (w < workend)
2082 outchar (*w++);
2083 }
2084
2085 if (info->spec != L_('\0'))
2086 outchar (info->spec);
2087
2088 all_done:
2089 return done;
2090 }
2091 \f
2092 /* Group the digits from W to REAR_PTR according to the grouping rules
2093 of the current locale. The interpretation of GROUPING is as in
2094 `struct lconv' from <locale.h>. The grouped number extends from
2095 the returned pointer until REAR_PTR. FRONT_PTR to W is used as a
2096 scratch area. */
2097 static CHAR_T *
2098 group_number (CHAR_T *front_ptr, CHAR_T *w, CHAR_T *rear_ptr,
2099 const char *grouping, THOUSANDS_SEP_T thousands_sep)
2100 {
2101 /* Length of the current group. */
2102 int len;
2103 #ifndef COMPILE_WPRINTF
2104 /* Length of the separator (in wide mode, the separator is always a
2105 single wide character). */
2106 int tlen = strlen (thousands_sep);
2107 #endif
2108
2109 /* We treat all negative values like CHAR_MAX. */
2110
2111 if (*grouping == CHAR_MAX || *grouping <= 0)
2112 /* No grouping should be done. */
2113 return w;
2114
2115 len = *grouping++;
2116
2117 /* Copy existing string so that nothing gets overwritten. */
2118 memmove (front_ptr, w, (rear_ptr - w) * sizeof (CHAR_T));
2119 CHAR_T *s = front_ptr + (rear_ptr - w);
2120
2121 w = rear_ptr;
2122
2123 /* Process all characters in the string. */
2124 while (s > front_ptr)
2125 {
2126 *--w = *--s;
2127
2128 if (--len == 0 && s > front_ptr)
2129 {
2130 /* A new group begins. */
2131 #ifdef COMPILE_WPRINTF
2132 if (w != s)
2133 *--w = thousands_sep;
2134 else
2135 /* Not enough room for the separator. */
2136 goto copy_rest;
2137 #else
2138 int cnt = tlen;
2139 if (tlen < w - s)
2140 do
2141 *--w = thousands_sep[--cnt];
2142 while (cnt > 0);
2143 else
2144 /* Not enough room for the separator. */
2145 goto copy_rest;
2146 #endif
2147
2148 if (*grouping == CHAR_MAX
2149 #if CHAR_MIN < 0
2150 || *grouping < 0
2151 #endif
2152 )
2153 {
2154 copy_rest:
2155 /* No further grouping to be done. Copy the rest of the
2156 number. */
2157 memmove (w, s, (front_ptr -s) * sizeof (CHAR_T));
2158 break;
2159 }
2160 else if (*grouping != '\0')
2161 len = *grouping++;
2162 else
2163 /* The previous grouping repeats ad infinitum. */
2164 len = grouping[-1];
2165 }
2166 }
2167 return w;
2168 }
2169 \f
2170 /* Helper "class" for `fprintf to unbuffered': creates a temporary buffer. */
2171 struct helper_file
2172 {
2173 struct _IO_FILE_plus _f;
2174 #ifdef COMPILE_WPRINTF
2175 struct _IO_wide_data _wide_data;
2176 #endif
2177 FILE *_put_stream;
2178 #ifdef _IO_MTSAFE_IO
2179 _IO_lock_t lock;
2180 #endif
2181 };
2182
2183 static int
2184 _IO_helper_overflow (FILE *s, int c)
2185 {
2186 FILE *target = ((struct helper_file*) s)->_put_stream;
2187 #ifdef COMPILE_WPRINTF
2188 int used = s->_wide_data->_IO_write_ptr - s->_wide_data->_IO_write_base;
2189 if (used)
2190 {
2191 size_t written = _IO_sputn (target, s->_wide_data->_IO_write_base, used);
2192 if (written == 0 || written == WEOF)
2193 return WEOF;
2194 __wmemmove (s->_wide_data->_IO_write_base,
2195 s->_wide_data->_IO_write_base + written,
2196 used - written);
2197 s->_wide_data->_IO_write_ptr -= written;
2198 }
2199 #else
2200 int used = s->_IO_write_ptr - s->_IO_write_base;
2201 if (used)
2202 {
2203 size_t written = _IO_sputn (target, s->_IO_write_base, used);
2204 if (written == 0 || written == EOF)
2205 return EOF;
2206 memmove (s->_IO_write_base, s->_IO_write_base + written,
2207 used - written);
2208 s->_IO_write_ptr -= written;
2209 }
2210 #endif
2211 return PUTC (c, s);
2212 }
2213
2214 #ifdef COMPILE_WPRINTF
2215 static const struct _IO_jump_t _IO_helper_jumps libio_vtable =
2216 {
2217 JUMP_INIT_DUMMY,
2218 JUMP_INIT (finish, _IO_wdefault_finish),
2219 JUMP_INIT (overflow, _IO_helper_overflow),
2220 JUMP_INIT (underflow, _IO_default_underflow),
2221 JUMP_INIT (uflow, _IO_default_uflow),
2222 JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
2223 JUMP_INIT (xsputn, _IO_wdefault_xsputn),
2224 JUMP_INIT (xsgetn, _IO_wdefault_xsgetn),
2225 JUMP_INIT (seekoff, _IO_default_seekoff),
2226 JUMP_INIT (seekpos, _IO_default_seekpos),
2227 JUMP_INIT (setbuf, _IO_default_setbuf),
2228 JUMP_INIT (sync, _IO_default_sync),
2229 JUMP_INIT (doallocate, _IO_wdefault_doallocate),
2230 JUMP_INIT (read, _IO_default_read),
2231 JUMP_INIT (write, _IO_default_write),
2232 JUMP_INIT (seek, _IO_default_seek),
2233 JUMP_INIT (close, _IO_default_close),
2234 JUMP_INIT (stat, _IO_default_stat)
2235 };
2236 #else
2237 static const struct _IO_jump_t _IO_helper_jumps libio_vtable =
2238 {
2239 JUMP_INIT_DUMMY,
2240 JUMP_INIT (finish, _IO_default_finish),
2241 JUMP_INIT (overflow, _IO_helper_overflow),
2242 JUMP_INIT (underflow, _IO_default_underflow),
2243 JUMP_INIT (uflow, _IO_default_uflow),
2244 JUMP_INIT (pbackfail, _IO_default_pbackfail),
2245 JUMP_INIT (xsputn, _IO_default_xsputn),
2246 JUMP_INIT (xsgetn, _IO_default_xsgetn),
2247 JUMP_INIT (seekoff, _IO_default_seekoff),
2248 JUMP_INIT (seekpos, _IO_default_seekpos),
2249 JUMP_INIT (setbuf, _IO_default_setbuf),
2250 JUMP_INIT (sync, _IO_default_sync),
2251 JUMP_INIT (doallocate, _IO_default_doallocate),
2252 JUMP_INIT (read, _IO_default_read),
2253 JUMP_INIT (write, _IO_default_write),
2254 JUMP_INIT (seek, _IO_default_seek),
2255 JUMP_INIT (close, _IO_default_close),
2256 JUMP_INIT (stat, _IO_default_stat)
2257 };
2258 #endif
2259
2260 static int
2261 buffered_vfprintf (FILE *s, const CHAR_T *format, va_list args,
2262 unsigned int mode_flags)
2263 {
2264 CHAR_T buf[BUFSIZ];
2265 struct helper_file helper;
2266 FILE *hp = (FILE *) &helper._f;
2267 int result, to_flush;
2268
2269 /* Orient the stream. */
2270 #ifdef ORIENT
2271 ORIENT;
2272 #endif
2273
2274 /* Initialize helper. */
2275 helper._put_stream = s;
2276 #ifdef COMPILE_WPRINTF
2277 hp->_wide_data = &helper._wide_data;
2278 _IO_wsetp (hp, buf, buf + sizeof buf / sizeof (CHAR_T));
2279 hp->_mode = 1;
2280 #else
2281 _IO_setp (hp, buf, buf + sizeof buf);
2282 hp->_mode = -1;
2283 #endif
2284 hp->_flags = _IO_MAGIC|_IO_NO_READS|_IO_USER_LOCK;
2285 #if _IO_JUMPS_OFFSET
2286 hp->_vtable_offset = 0;
2287 #endif
2288 #ifdef _IO_MTSAFE_IO
2289 hp->_lock = NULL;
2290 #endif
2291 hp->_flags2 = s->_flags2;
2292 _IO_JUMPS (&helper._f) = (struct _IO_jump_t *) &_IO_helper_jumps;
2293
2294 /* Now print to helper instead. */
2295 result = vfprintf (hp, format, args, mode_flags);
2296
2297 /* Lock stream. */
2298 __libc_cleanup_region_start (1, (void (*) (void *)) &_IO_funlockfile, s);
2299 _IO_flockfile (s);
2300
2301 /* Now flush anything from the helper to the S. */
2302 #ifdef COMPILE_WPRINTF
2303 if ((to_flush = (hp->_wide_data->_IO_write_ptr
2304 - hp->_wide_data->_IO_write_base)) > 0)
2305 {
2306 if ((int) _IO_sputn (s, hp->_wide_data->_IO_write_base, to_flush)
2307 != to_flush)
2308 result = -1;
2309 }
2310 #else
2311 if ((to_flush = hp->_IO_write_ptr - hp->_IO_write_base) > 0)
2312 {
2313 if ((int) _IO_sputn (s, hp->_IO_write_base, to_flush) != to_flush)
2314 result = -1;
2315 }
2316 #endif
2317
2318 /* Unlock the stream. */
2319 _IO_funlockfile (s);
2320 __libc_cleanup_region_end (0);
2321
2322 return result;
2323 }
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