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