source: mainline/kernel/generic/src/printf/printf_core.c@ e701eb1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since e701eb1 was 6ab8697, checked in by Martin Decky <martin@…>, 16 years ago

use builtin_va_* for va_* functions and va_list type
(this is probably safer than our own implementation since it respects the particular ABI used by the compiler)
this fixes kernel printf() when using clang
  • Property mode set to 100644
File size: 21.8 KB
Line 
1/*
2 * Copyright (c) 2001-2004 Jakub Jermar
3 * Copyright (c) 2006 Josef Cejka
4 * Copyright (c) 2009 Martin Decky
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * - Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * - The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/** @addtogroup generic
32 * @{
33 */
34/**
35 * @file
36 * @brief Printing functions.
37 */
38
39#include <printf/printf_core.h>
40#include <print.h>
41#include <stdarg.h>
42#include <macros.h>
43#include <string.h>
44#include <arch.h>
45
46/** show prefixes 0x or 0 */
47#define __PRINTF_FLAG_PREFIX 0x00000001
48/** signed / unsigned number */
49#define __PRINTF_FLAG_SIGNED 0x00000002
50/** print leading zeroes */
51#define __PRINTF_FLAG_ZEROPADDED 0x00000004
52/** align to left */
53#define __PRINTF_FLAG_LEFTALIGNED 0x00000010
54/** always show + sign */
55#define __PRINTF_FLAG_SHOWPLUS 0x00000020
56/** print space instead of plus */
57#define __PRINTF_FLAG_SPACESIGN 0x00000040
58/** show big characters */
59#define __PRINTF_FLAG_BIGCHARS 0x00000080
60/** number has - sign */
61#define __PRINTF_FLAG_NEGATIVE 0x00000100
62
63/**
64 * Buffer big enough for 64-bit number printed in base 2, sign, prefix and 0
65 * to terminate string... (last one is only for better testing end of buffer by
66 * zero-filling subroutine)
67 */
68#define PRINT_NUMBER_BUFFER_SIZE (64 + 5)
69
70/** Enumeration of possible arguments types.
71 */
72typedef enum {
73 PrintfQualifierByte = 0,
74 PrintfQualifierShort,
75 PrintfQualifierInt,
76 PrintfQualifierLong,
77 PrintfQualifierLongLong,
78 PrintfQualifierPointer
79} qualifier_t;
80
81static char nullstr[] = "(NULL)";
82static char digits_small[] = "0123456789abcdef";
83static char digits_big[] = "0123456789ABCDEF";
84static char invalch = U_SPECIAL;
85
86/** Print one or more characters without adding newline.
87 *
88 * @param buf Buffer holding characters with size of
89 * at least size bytes. NULL is not allowed!
90 * @param size Size of the buffer in bytes.
91 * @param ps Output method and its data.
92 *
93 * @return Number of characters printed.
94 *
95 */
96static int printf_putnchars(const char *buf, size_t size,
97 printf_spec_t *ps)
98{
99 return ps->str_write((void *) buf, size, ps->data);
100}
101
102/** Print one or more wide characters without adding newline.
103 *
104 * @param buf Buffer holding wide characters with size of
105 * at least size bytes. NULL is not allowed!
106 * @param size Size of the buffer in bytes.
107 * @param ps Output method and its data.
108 *
109 * @return Number of wide characters printed.
110 *
111 */
112static int printf_wputnchars(const wchar_t *buf, size_t size,
113 printf_spec_t *ps)
114{
115 return ps->wstr_write((void *) buf, size, ps->data);
116}
117
118/** Print string without adding a newline.
119 *
120 * @param str String to print.
121 * @param ps Write function specification and support data.
122 *
123 * @return Number of characters printed.
124 *
125 */
126static int printf_putstr(const char *str, printf_spec_t *ps)
127{
128 if (str == NULL)
129 return printf_putnchars(nullstr, str_size(nullstr), ps);
130
131 return ps->str_write((void *) str, str_size(str), ps->data);
132}
133
134/** Print one ASCII character.
135 *
136 * @param c ASCII character to be printed.
137 * @param ps Output method.
138 *
139 * @return Number of characters printed.
140 *
141 */
142static int printf_putchar(const char ch, printf_spec_t *ps)
143{
144 if (!ascii_check(ch))
145 return ps->str_write((void *) &invalch, 1, ps->data);
146
147 return ps->str_write(&ch, 1, ps->data);
148}
149
150/** Print one wide character.
151 *
152 * @param c Wide character to be printed.
153 * @param ps Output method.
154 *
155 * @return Number of characters printed.
156 *
157 */
158static int printf_putwchar(const wchar_t ch, printf_spec_t *ps)
159{
160 if (!chr_check(ch))
161 return ps->str_write((void *) &invalch, 1, ps->data);
162
163 return ps->wstr_write(&ch, sizeof(wchar_t), ps->data);
164}
165
166/** Print one formatted ASCII character.
167 *
168 * @param ch Character to print.
169 * @param width Width modifier.
170 * @param flags Flags that change the way the character is printed.
171 *
172 * @return Number of characters printed, negative value on failure.
173 *
174 */
175static int print_char(const char ch, int width, uint32_t flags, printf_spec_t *ps)
176{
177 size_t counter = 0;
178 if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
179 while (--width > 0) {
180 /*
181 * One space is consumed by the character itself, hence
182 * the predecrement.
183 */
184 if (printf_putchar(' ', ps) > 0)
185 counter++;
186 }
187 }
188
189 if (printf_putchar(ch, ps) > 0)
190 counter++;
191
192 while (--width > 0) {
193 /*
194 * One space is consumed by the character itself, hence
195 * the predecrement.
196 */
197 if (printf_putchar(' ', ps) > 0)
198 counter++;
199 }
200
201 return (int) (counter + 1);
202}
203
204/** Print one formatted wide character.
205 *
206 * @param ch Character to print.
207 * @param width Width modifier.
208 * @param flags Flags that change the way the character is printed.
209 *
210 * @return Number of characters printed, negative value on failure.
211 *
212 */
213static int print_wchar(const wchar_t ch, int width, uint32_t flags, printf_spec_t *ps)
214{
215 size_t counter = 0;
216 if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
217 while (--width > 0) {
218 /*
219 * One space is consumed by the character itself, hence
220 * the predecrement.
221 */
222 if (printf_putchar(' ', ps) > 0)
223 counter++;
224 }
225 }
226
227 if (printf_putwchar(ch, ps) > 0)
228 counter++;
229
230 while (--width > 0) {
231 /*
232 * One space is consumed by the character itself, hence
233 * the predecrement.
234 */
235 if (printf_putchar(' ', ps) > 0)
236 counter++;
237 }
238
239 return (int) (counter + 1);
240}
241
242/** Print string.
243 *
244 * @param str String to be printed.
245 * @param width Width modifier.
246 * @param precision Precision modifier.
247 * @param flags Flags that modify the way the string is printed.
248 *
249 * @return Number of characters printed, negative value on failure.
250 */
251static int print_str(char *str, int width, unsigned int precision,
252 uint32_t flags, printf_spec_t *ps)
253{
254 if (str == NULL)
255 return printf_putstr(nullstr, ps);
256
257 /* Print leading spaces. */
258 size_t strw = str_length(str);
259 if (precision == 0)
260 precision = strw;
261
262 /* Left padding */
263 size_t counter = 0;
264 width -= precision;
265 if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
266 while (width-- > 0) {
267 if (printf_putchar(' ', ps) == 1)
268 counter++;
269 }
270 }
271
272 /* Part of @a str fitting into the alloted space. */
273 int retval;
274 size_t size = str_lsize(str, precision);
275 if ((retval = printf_putnchars(str, size, ps)) < 0)
276 return -counter;
277
278 counter += retval;
279
280 /* Right padding */
281 while (width-- > 0) {
282 if (printf_putchar(' ', ps) == 1)
283 counter++;
284 }
285
286 return ((int) counter);
287
288}
289
290/** Print wide string.
291 *
292 * @param str Wide string to be printed.
293 * @param width Width modifier.
294 * @param precision Precision modifier.
295 * @param flags Flags that modify the way the string is printed.
296 *
297 * @return Number of wide characters printed, negative value on failure.
298 */
299static int print_wstr(wchar_t *str, int width, unsigned int precision,
300 uint32_t flags, printf_spec_t *ps)
301{
302 if (str == NULL)
303 return printf_putstr(nullstr, ps);
304
305 /* Print leading spaces. */
306 size_t strw = wstr_length(str);
307 if (precision == 0)
308 precision = strw;
309
310 /* Left padding */
311 size_t counter = 0;
312 width -= precision;
313 if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
314 while (width-- > 0) {
315 if (printf_putchar(' ', ps) == 1)
316 counter++;
317 }
318 }
319
320 /* Part of @a wstr fitting into the alloted space. */
321 int retval;
322 size_t size = wstr_lsize(str, precision);
323 if ((retval = printf_wputnchars(str, size, ps)) < 0)
324 return -counter;
325
326 counter += retval;
327
328 /* Right padding */
329 while (width-- > 0) {
330 if (printf_putchar(' ', ps) == 1)
331 counter++;
332 }
333
334 return ((int) counter);
335}
336
337/** Print a number in a given base.
338 *
339 * Print significant digits of a number in given base.
340 *
341 * @param num Number to print.
342 * @param width Width modifier.
343 * @param precision Precision modifier.
344 * @param base Base to print the number in (must be between 2 and 16).
345 * @param flags Flags that modify the way the number is printed.
346 *
347 * @return Number of characters printed.
348 *
349 */
350static int print_number(uint64_t num, int width, int precision, int base,
351 uint32_t flags, printf_spec_t *ps)
352{
353 char *digits;
354 if (flags & __PRINTF_FLAG_BIGCHARS)
355 digits = digits_big;
356 else
357 digits = digits_small;
358
359 char data[PRINT_NUMBER_BUFFER_SIZE];
360 char *ptr = &data[PRINT_NUMBER_BUFFER_SIZE - 1];
361
362 /* Size of number with all prefixes and signs */
363 int size = 0;
364
365 /* Put zero at end of string */
366 *ptr-- = 0;
367
368 if (num == 0) {
369 *ptr-- = '0';
370 size++;
371 } else {
372 do {
373 *ptr-- = digits[num % base];
374 size++;
375 } while (num /= base);
376 }
377
378 /* Size of plain number */
379 int number_size = size;
380
381 /*
382 * Collect the sum of all prefixes/signs/etc. to calculate padding and
383 * leading zeroes.
384 */
385 if (flags & __PRINTF_FLAG_PREFIX) {
386 switch(base) {
387 case 2:
388 /* Binary formating is not standard, but usefull */
389 size += 2;
390 break;
391 case 8:
392 size++;
393 break;
394 case 16:
395 size += 2;
396 break;
397 }
398 }
399
400 char sgn = 0;
401 if (flags & __PRINTF_FLAG_SIGNED) {
402 if (flags & __PRINTF_FLAG_NEGATIVE) {
403 sgn = '-';
404 size++;
405 } else if (flags & __PRINTF_FLAG_SHOWPLUS) {
406 sgn = '+';
407 size++;
408 } else if (flags & __PRINTF_FLAG_SPACESIGN) {
409 sgn = ' ';
410 size++;
411 }
412 }
413
414 if (flags & __PRINTF_FLAG_LEFTALIGNED)
415 flags &= ~__PRINTF_FLAG_ZEROPADDED;
416
417 /*
418 * If the number is left-aligned or precision is specified then
419 * padding with zeros is ignored.
420 */
421 if (flags & __PRINTF_FLAG_ZEROPADDED) {
422 if ((precision == 0) && (width > size))
423 precision = width - size + number_size;
424 }
425
426 /* Print leading spaces */
427 if (number_size > precision) {
428 /* Print the whole number, not only a part */
429 precision = number_size;
430 }
431
432 width -= precision + size - number_size;
433 size_t counter = 0;
434
435 if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
436 while (width-- > 0) {
437 if (printf_putchar(' ', ps) == 1)
438 counter++;
439 }
440 }
441
442 /* Print sign */
443 if (sgn) {
444 if (printf_putchar(sgn, ps) == 1)
445 counter++;
446 }
447
448 /* Print prefix */
449 if (flags & __PRINTF_FLAG_PREFIX) {
450 switch(base) {
451 case 2:
452 /* Binary formating is not standard, but usefull */
453 if (printf_putchar('0', ps) == 1)
454 counter++;
455 if (flags & __PRINTF_FLAG_BIGCHARS) {
456 if (printf_putchar('B', ps) == 1)
457 counter++;
458 } else {
459 if (printf_putchar('b', ps) == 1)
460 counter++;
461 }
462 break;
463 case 8:
464 if (printf_putchar('o', ps) == 1)
465 counter++;
466 break;
467 case 16:
468 if (printf_putchar('0', ps) == 1)
469 counter++;
470 if (flags & __PRINTF_FLAG_BIGCHARS) {
471 if (printf_putchar('X', ps) == 1)
472 counter++;
473 } else {
474 if (printf_putchar('x', ps) == 1)
475 counter++;
476 }
477 break;
478 }
479 }
480
481 /* Print leading zeroes */
482 precision -= number_size;
483 while (precision-- > 0) {
484 if (printf_putchar('0', ps) == 1)
485 counter++;
486 }
487
488 /* Print the number itself */
489 int retval;
490 if ((retval = printf_putstr(++ptr, ps)) > 0)
491 counter += retval;
492
493 /* Print trailing spaces */
494
495 while (width-- > 0) {
496 if (printf_putchar(' ', ps) == 1)
497 counter++;
498 }
499
500 return ((int) counter);
501}
502
503/** Print formatted string.
504 *
505 * Print string formatted according to the fmt parameter and variadic arguments.
506 * Each formatting directive must have the following form:
507 *
508 * \% [ FLAGS ] [ WIDTH ] [ .PRECISION ] [ TYPE ] CONVERSION
509 *
510 * FLAGS:@n
511 * - "#" Force to print prefix. For \%o conversion, the prefix is 0, for
512 * \%x and \%X prefixes are 0x and 0X and for conversion \%b the
513 * prefix is 0b.
514 *
515 * - "-" Align to left.
516 *
517 * - "+" Print positive sign just as negative.
518 *
519 * - " " If the printed number is positive and "+" flag is not set,
520 * print space in place of sign.
521 *
522 * - "0" Print 0 as padding instead of spaces. Zeroes are placed between
523 * sign and the rest of the number. This flag is ignored if "-"
524 * flag is specified.
525 *
526 * WIDTH:@n
527 * - Specify the minimal width of a printed argument. If it is bigger,
528 * width is ignored. If width is specified with a "*" character instead of
529 * number, width is taken from parameter list. And integer parameter is
530 * expected before parameter for processed conversion specification. If
531 * this value is negative its absolute value is taken and the "-" flag is
532 * set.
533 *
534 * PRECISION:@n
535 * - Value precision. For numbers it specifies minimum valid numbers.
536 * Smaller numbers are printed with leading zeroes. Bigger numbers are not
537 * affected. Strings with more than precision characters are cut off. Just
538 * as with width, an "*" can be used used instead of a number. An integer
539 * value is then expected in parameters. When both width and precision are
540 * specified using "*", the first parameter is used for width and the
541 * second one for precision.
542 *
543 * TYPE:@n
544 * - "hh" Signed or unsigned char.@n
545 * - "h" Signed or unsigned short.@n
546 * - "" Signed or unsigned int (default value).@n
547 * - "l" Signed or unsigned long int.@n
548 * If conversion is "c", the character is wchar_t (wide character).@n
549 * If conversion is "s", the string is wchar_t * (wide string).@n
550 * - "ll" Signed or unsigned long long int.@n
551 *
552 * CONVERSION:@n
553 * - % Print percentile character itself.
554 *
555 * - c Print single character. The character is expected to be plain
556 * ASCII (e.g. only values 0 .. 127 are valid).@n
557 * If type is "l", then the character is expected to be wide character
558 * (e.g. values 0 .. 0x10ffff are valid).
559 *
560 * - s Print zero terminated string. If a NULL value is passed as
561 * value, "(NULL)" is printed instead.@n
562 * If type is "l", then the string is expected to be wide string.
563 *
564 * - P, p Print value of a pointer. Void * value is expected and it is
565 * printed in hexadecimal notation with prefix (as with \%#X / \%#x
566 * for 32-bit or \%#X / \%#x for 64-bit long pointers).
567 *
568 * - b Print value as unsigned binary number. Prefix is not printed by
569 * default. (Nonstandard extension.)
570 *
571 * - o Print value as unsigned octal number. Prefix is not printed by
572 * default.
573 *
574 * - d, i Print signed decimal number. There is no difference between d
575 * and i conversion.
576 *
577 * - u Print unsigned decimal number.
578 *
579 * - X, x Print hexadecimal number with upper- or lower-case. Prefix is
580 * not printed by default.
581 *
582 * All other characters from fmt except the formatting directives are printed
583 * verbatim.
584 *
585 * @param fmt Format NULL-terminated string.
586 *
587 * @return Number of characters printed, negative value on failure.
588 *
589 */
590int printf_core(const char *fmt, printf_spec_t *ps, va_list ap)
591{
592 size_t i; /* Index of the currently processed character from fmt */
593 size_t nxt = 0; /* Index of the next character from fmt */
594 size_t j = 0; /* Index to the first not printed nonformating character */
595
596 size_t counter = 0; /* Number of characters printed */
597 int retval; /* Return values from nested functions */
598
599 while (true) {
600 i = nxt;
601 wchar_t uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
602
603 if (uc == 0)
604 break;
605
606 /* Control character */
607 if (uc == '%') {
608 /* Print common characters if any processed */
609 if (i > j) {
610 if ((retval = printf_putnchars(&fmt[j], i - j, ps)) < 0) {
611 /* Error */
612 counter = -counter;
613 goto out;
614 }
615 counter += retval;
616 }
617
618 j = i;
619
620 /* Parse modifiers */
621 uint32_t flags = 0;
622 bool end = false;
623
624 do {
625 i = nxt;
626 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
627 switch (uc) {
628 case '#':
629 flags |= __PRINTF_FLAG_PREFIX;
630 break;
631 case '-':
632 flags |= __PRINTF_FLAG_LEFTALIGNED;
633 break;
634 case '+':
635 flags |= __PRINTF_FLAG_SHOWPLUS;
636 break;
637 case ' ':
638 flags |= __PRINTF_FLAG_SPACESIGN;
639 break;
640 case '0':
641 flags |= __PRINTF_FLAG_ZEROPADDED;
642 break;
643 default:
644 end = true;
645 };
646 } while (!end);
647
648 /* Width & '*' operator */
649 int width = 0;
650 if (isdigit(uc)) {
651 while (true) {
652 width *= 10;
653 width += uc - '0';
654
655 i = nxt;
656 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
657 if (uc == 0)
658 break;
659 if (!isdigit(uc))
660 break;
661 }
662 } else if (uc == '*') {
663 /* Get width value from argument list */
664 i = nxt;
665 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
666 width = (int) va_arg(ap, int);
667 if (width < 0) {
668 /* Negative width sets '-' flag */
669 width *= -1;
670 flags |= __PRINTF_FLAG_LEFTALIGNED;
671 }
672 }
673
674 /* Precision and '*' operator */
675 int precision = 0;
676 if (uc == '.') {
677 i = nxt;
678 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
679 if (isdigit(uc)) {
680 while (true) {
681 precision *= 10;
682 precision += uc - '0';
683
684 i = nxt;
685 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
686 if (uc == 0)
687 break;
688 if (!isdigit(uc))
689 break;
690 }
691 } else if (uc == '*') {
692 /* Get precision value from the argument list */
693 i = nxt;
694 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
695 precision = (int) va_arg(ap, int);
696 if (precision < 0) {
697 /* Ignore negative precision */
698 precision = 0;
699 }
700 }
701 }
702
703 qualifier_t qualifier;
704
705 switch (uc) {
706 /** @todo Unimplemented qualifiers:
707 * t ptrdiff_t - ISO C 99
708 */
709 case 'h':
710 /* Char or short */
711 qualifier = PrintfQualifierShort;
712 i = nxt;
713 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
714 if (uc == 'h') {
715 i = nxt;
716 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
717 qualifier = PrintfQualifierByte;
718 }
719 break;
720 case 'l':
721 /* Long or long long */
722 qualifier = PrintfQualifierLong;
723 i = nxt;
724 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
725 if (uc == 'l') {
726 i = nxt;
727 uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
728 qualifier = PrintfQualifierLongLong;
729 }
730 break;
731 default:
732 /* Default type */
733 qualifier = PrintfQualifierInt;
734 }
735
736 unsigned int base = 10;
737
738 switch (uc) {
739 /*
740 * String and character conversions.
741 */
742 case 's':
743 if (qualifier == PrintfQualifierLong)
744 retval = print_wstr(va_arg(ap, wchar_t *), width, precision, flags, ps);
745 else
746 retval = print_str(va_arg(ap, char *), width, precision, flags, ps);
747
748 if (retval < 0) {
749 counter = -counter;
750 goto out;
751 }
752
753 counter += retval;
754 j = nxt;
755 goto next_char;
756 case 'c':
757 if (qualifier == PrintfQualifierLong)
758 retval = print_wchar(va_arg(ap, wchar_t), width, flags, ps);
759 else
760 retval = print_char(va_arg(ap, unsigned int), width, flags, ps);
761
762 if (retval < 0) {
763 counter = -counter;
764 goto out;
765 };
766
767 counter += retval;
768 j = nxt;
769 goto next_char;
770
771 /*
772 * Integer values
773 */
774 case 'P':
775 /* Pointer */
776 flags |= __PRINTF_FLAG_BIGCHARS;
777 case 'p':
778 flags |= __PRINTF_FLAG_PREFIX;
779 base = 16;
780 qualifier = PrintfQualifierPointer;
781 break;
782 case 'b':
783 base = 2;
784 break;
785 case 'o':
786 base = 8;
787 break;
788 case 'd':
789 case 'i':
790 flags |= __PRINTF_FLAG_SIGNED;
791 case 'u':
792 break;
793 case 'X':
794 flags |= __PRINTF_FLAG_BIGCHARS;
795 case 'x':
796 base = 16;
797 break;
798
799 /* Percentile itself */
800 case '%':
801 j = i;
802 goto next_char;
803
804 /*
805 * Bad formatting.
806 */
807 default:
808 /*
809 * Unknown format. Now, j is the index of '%'
810 * so we will print whole bad format sequence.
811 */
812 goto next_char;
813 }
814
815 /* Print integers */
816 size_t size;
817 uint64_t number;
818 switch (qualifier) {
819 case PrintfQualifierByte:
820 size = sizeof(unsigned char);
821 number = (uint64_t) va_arg(ap, unsigned int);
822 break;
823 case PrintfQualifierShort:
824 size = sizeof(unsigned short);
825 number = (uint64_t) va_arg(ap, unsigned int);
826 break;
827 case PrintfQualifierInt:
828 size = sizeof(unsigned int);
829 number = (uint64_t) va_arg(ap, unsigned int);
830 break;
831 case PrintfQualifierLong:
832 size = sizeof(unsigned long);
833 number = (uint64_t) va_arg(ap, unsigned long);
834 break;
835 case PrintfQualifierLongLong:
836 size = sizeof(unsigned long long);
837 number = (uint64_t) va_arg(ap, unsigned long long);
838 break;
839 case PrintfQualifierPointer:
840 size = sizeof(void *);
841 number = (uint64_t) (unsigned long) va_arg(ap, void *);
842 break;
843 default:
844 /* Unknown qualifier */
845 counter = -counter;
846 goto out;
847 }
848
849 if (flags & __PRINTF_FLAG_SIGNED) {
850 if (number & (0x1 << (size * 8 - 1))) {
851 flags |= __PRINTF_FLAG_NEGATIVE;
852
853 if (size == sizeof(uint64_t)) {
854 number = -((int64_t) number);
855 } else {
856 number = ~number;
857 number &=
858 ~(0xFFFFFFFFFFFFFFFFll <<
859 (size * 8));
860 number++;
861 }
862 }
863 }
864
865 if ((retval = print_number(number, width, precision,
866 base, flags, ps)) < 0) {
867 counter = -counter;
868 goto out;
869 }
870
871 counter += retval;
872 j = nxt;
873 }
874next_char:
875 ;
876 }
877
878 if (i > j) {
879 if ((retval = printf_putnchars(&fmt[j], i - j, ps)) < 0) {
880 /* Error */
881 counter = -counter;
882 goto out;
883 }
884 counter += retval;
885 }
886
887out:
888 return ((int) counter);
889}
890
891/** @}
892 */
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