1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * Copyright (c) 2011 The FreeBSD Foundation
11 *
12 * Portions of this software were developed by David Chisnall
13 * under sponsorship from the FreeBSD Foundation.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 /*
41 * Actual printf innards.
42 *
43 * This code is large and complicated...
44 */
45
46 #include "namespace.h"
47 #include <sys/types.h>
48
49 #include <ctype.h>
50 #include <errno.h>
51 #include <limits.h>
52 #include <locale.h>
53 #include <stddef.h>
54 #include <stdint.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <wchar.h>
59 #include <printf.h>
60
61 #include <stdarg.h>
62 #include "xlocale_private.h"
63 #include "un-namespace.h"
64
65 #include "libc_private.h"
66 #include "local.h"
67 #include "fvwrite.h"
68 #include "printflocal.h"
69
70 static int __sprint(FILE *, struct __suio *, locale_t);
71 static int __sbprintf(FILE *, locale_t, int, const char *, va_list)
72 __printflike(4, 0)
73 __noinline;
74 static char *__wcsconv(wchar_t *, int);
75
76 #define CHAR char
77 #include "printfcommon.h"
78
79 struct grouping_state {
80 char *thousands_sep; /* locale-specific thousands separator */
81 int thousep_len; /* length of thousands_sep */
82 const char *grouping; /* locale-specific numeric grouping rules */
83 int lead; /* sig figs before decimal or group sep */
84 int nseps; /* number of group separators with ' */
85 int nrepeats; /* number of repeats of the last group */
86 };
87
88 /*
89 * Initialize the thousands' grouping state in preparation to print a
90 * number with ndigits digits. This routine returns the total number
91 * of bytes that will be needed.
92 */
93 static int
grouping_init(struct grouping_state * gs,int ndigits,locale_t loc)94 grouping_init(struct grouping_state *gs, int ndigits, locale_t loc)
95 {
96 struct lconv *locale;
97
98 locale = localeconv_l(loc);
99 gs->grouping = locale->grouping;
100 gs->thousands_sep = locale->thousands_sep;
101 gs->thousep_len = strlen(gs->thousands_sep);
102
103 gs->nseps = gs->nrepeats = 0;
104 gs->lead = ndigits;
105 while (*gs->grouping != CHAR_MAX) {
106 if (gs->lead <= *gs->grouping)
107 break;
108 gs->lead -= *gs->grouping;
109 if (*(gs->grouping+1)) {
110 gs->nseps++;
111 gs->grouping++;
112 } else
113 gs->nrepeats++;
114 }
115 return ((gs->nseps + gs->nrepeats) * gs->thousep_len);
116 }
117
118 /*
119 * Print a number with thousands' separators.
120 */
121 static int
grouping_print(struct grouping_state * gs,struct io_state * iop,const CHAR * cp,const CHAR * ep,locale_t locale)122 grouping_print(struct grouping_state *gs, struct io_state *iop,
123 const CHAR *cp, const CHAR *ep, locale_t locale)
124 {
125 const CHAR *cp0 = cp;
126
127 if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
128 return (-1);
129 cp += gs->lead;
130 while (gs->nseps > 0 || gs->nrepeats > 0) {
131 if (gs->nrepeats > 0)
132 gs->nrepeats--;
133 else {
134 gs->grouping--;
135 gs->nseps--;
136 }
137 if (io_print(iop, gs->thousands_sep, gs->thousep_len, locale))
138 return (-1);
139 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
140 return (-1);
141 cp += *gs->grouping;
142 }
143 if (cp > ep)
144 cp = ep;
145 return (cp - cp0);
146 }
147
148 /*
149 * Flush out all the vectors defined by the given uio,
150 * then reset it so that it can be reused.
151 */
152 static int
__sprint(FILE * fp,struct __suio * uio,locale_t locale)153 __sprint(FILE *fp, struct __suio *uio, locale_t locale)
154 {
155 int err;
156
157 if (uio->uio_resid == 0) {
158 uio->uio_iovcnt = 0;
159 return (0);
160 }
161 err = __sfvwrite(fp, uio);
162 uio->uio_resid = 0;
163 uio->uio_iovcnt = 0;
164 return (err);
165 }
166
167 /*
168 * Helper function for `fprintf to unbuffered unix file': creates a
169 * temporary buffer. We only work on write-only files; this avoids
170 * worries about ungetc buffers and so forth.
171 */
172 static int
__sbprintf(FILE * fp,locale_t locale,int serrno,const char * fmt,va_list ap)173 __sbprintf(FILE *fp, locale_t locale, int serrno, const char *fmt, va_list ap)
174 {
175 int ret;
176 FILE fake = FAKE_FILE;
177 unsigned char buf[BUFSIZ];
178
179 /* XXX This is probably not needed. */
180 if (prepwrite(fp) != 0)
181 return (EOF);
182
183 /* copy the important variables */
184 fake._flags = fp->_flags & ~__SNBF;
185 fake._file = fp->_file;
186 fake._cookie = fp->_cookie;
187 fake._write = fp->_write;
188 fake._orientation = fp->_orientation;
189 fake._mbstate = fp->_mbstate;
190
191 /* set up the buffer */
192 fake._bf._base = fake._p = buf;
193 fake._bf._size = fake._w = sizeof(buf);
194 fake._lbfsize = 0; /* not actually used, but Just In Case */
195
196 /* do the work, then copy any error status */
197 ret = __vfprintf(&fake, locale, serrno, fmt, ap);
198 if (ret >= 0 && __fflush(&fake))
199 ret = EOF;
200 if (fake._flags & __SERR)
201 fp->_flags |= __SERR;
202 return (ret);
203 }
204
205 /*
206 * Convert a wide character string argument for the %ls format to a multibyte
207 * string representation. If not -1, prec specifies the maximum number of
208 * bytes to output, and also means that we can't assume that the wide char.
209 * string ends is null-terminated.
210 */
211 static char *
__wcsconv(wchar_t * wcsarg,int prec)212 __wcsconv(wchar_t *wcsarg, int prec)
213 {
214 static const mbstate_t initial;
215 mbstate_t mbs;
216 char buf[MB_LEN_MAX];
217 wchar_t *p;
218 char *convbuf;
219 size_t clen, nbytes;
220
221 /* Allocate space for the maximum number of bytes we could output. */
222 if (prec < 0) {
223 p = wcsarg;
224 mbs = initial;
225 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
226 if (nbytes == (size_t)-1)
227 return (NULL);
228 } else {
229 /*
230 * Optimisation: if the output precision is small enough,
231 * just allocate enough memory for the maximum instead of
232 * scanning the string.
233 */
234 if (prec < 128)
235 nbytes = prec;
236 else {
237 nbytes = 0;
238 p = wcsarg;
239 mbs = initial;
240 for (;;) {
241 clen = wcrtomb(buf, *p++, &mbs);
242 if (clen == 0 || clen == (size_t)-1 ||
243 nbytes + clen > prec)
244 break;
245 nbytes += clen;
246 }
247 }
248 }
249 if ((convbuf = malloc(nbytes + 1)) == NULL)
250 return (NULL);
251
252 /* Fill the output buffer. */
253 p = wcsarg;
254 mbs = initial;
255 if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p,
256 nbytes, &mbs)) == (size_t)-1) {
257 free(convbuf);
258 return (NULL);
259 }
260 convbuf[nbytes] = '\0';
261 return (convbuf);
262 }
263
264 /*
265 * MT-safe version
266 */
267 int
vfprintf_l(FILE * __restrict fp,locale_t locale,const char * __restrict fmt0,va_list ap)268 vfprintf_l(FILE * __restrict fp, locale_t locale, const char * __restrict fmt0,
269 va_list ap)
270 {
271 int serrno = errno;
272 int ret;
273 FIX_LOCALE(locale);
274
275 FLOCKFILE_CANCELSAFE(fp);
276 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
277 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
278 fp->_file >= 0)
279 ret = __sbprintf(fp, locale, serrno, fmt0, ap);
280 else
281 ret = __vfprintf(fp, locale, serrno, fmt0, ap);
282 FUNLOCKFILE_CANCELSAFE();
283 return (ret);
284 }
285 int
vfprintf(FILE * __restrict fp,const char * __restrict fmt0,va_list ap)286 vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap)
287 {
288 return vfprintf_l(fp, __get_locale(), fmt0, ap);
289 }
290
291 /*
292 * The size of the buffer we use as scratch space for integer
293 * conversions, among other things. We need enough space to
294 * write a uintmax_t in binary.
295 */
296 #define BUF (sizeof(uintmax_t) * CHAR_BIT)
297
298 /*
299 * Non-MT-safe version
300 */
301 int
__vfprintf(FILE * fp,locale_t locale,int serrno,const char * fmt0,va_list ap)302 __vfprintf(FILE *fp, locale_t locale, int serrno, const char *fmt0, va_list ap)
303 {
304 char *fmt; /* format string */
305 int ch; /* character from fmt */
306 int n, n2; /* handy integer (short term usage) */
307 char *cp; /* handy char pointer (short term usage) */
308 int flags; /* flags as above */
309 int ret; /* return value accumulator */
310 int width; /* width from format (%8d), or 0 */
311 int prec; /* precision from format; <0 for N/A */
312 int error;
313 char errnomsg[NL_TEXTMAX];
314 char sign; /* sign prefix (' ', '+', '-', or \0) */
315 struct grouping_state gs; /* thousands' grouping info */
316
317 #ifndef NO_FLOATING_POINT
318 /*
319 * We can decompose the printed representation of floating
320 * point numbers into several parts, some of which may be empty:
321 *
322 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
323 * A B ---C--- D E F
324 *
325 * A: 'sign' holds this value if present; '\0' otherwise
326 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
327 * C: cp points to the string MMMNNN. Leading and trailing
328 * zeros are not in the string and must be added.
329 * D: expchar holds this character; '\0' if no exponent, e.g. %f
330 * F: at least two digits for decimal, at least one digit for hex
331 */
332 char *decimal_point; /* locale specific decimal point */
333 int decpt_len; /* length of decimal_point */
334 int signflag; /* true if float is negative */
335 union { /* floating point arguments %[aAeEfFgG] */
336 double dbl;
337 long double ldbl;
338 } fparg;
339 int expt; /* integer value of exponent */
340 char expchar; /* exponent character: [eEpP\0] */
341 char *dtoaend; /* pointer to end of converted digits */
342 int expsize; /* character count for expstr */
343 int ndig; /* actual number of digits returned by dtoa */
344 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
345 char *dtoaresult; /* buffer allocated by dtoa */
346 #endif
347 u_long ulval; /* integer arguments %[diouxX] */
348 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
349 int base; /* base for [diouxX] conversion */
350 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
351 int realsz; /* field size expanded by dprec, sign, etc */
352 int size; /* size of converted field or string */
353 int prsize; /* max size of printed field */
354 const char *xdigs; /* digits for %[xX] conversion */
355 struct io_state io; /* I/O buffering state */
356 char buf[BUF]; /* buffer with space for digits of uintmax_t */
357 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
358 union arg *argtable; /* args, built due to positional arg */
359 union arg statargtable [STATIC_ARG_TBL_SIZE];
360 int nextarg; /* 1-based argument index */
361 va_list orgap; /* original argument pointer */
362 char *convbuf; /* wide to multibyte conversion result */
363 int savserr;
364
365 static const char xdigs_lower[16] = "0123456789abcdef";
366 static const char xdigs_upper[16] = "0123456789ABCDEF";
367
368 /* BEWARE, these `goto error' on error. */
369 #define PRINT(ptr, len) { \
370 if (io_print(&io, (ptr), (len), locale)) \
371 goto error; \
372 }
373 #define PAD(howmany, with) { \
374 if (io_pad(&io, (howmany), (with), locale)) \
375 goto error; \
376 }
377 #define PRINTANDPAD(p, ep, len, with) { \
378 if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
379 goto error; \
380 }
381 #define FLUSH() { \
382 if (io_flush(&io, locale)) \
383 goto error; \
384 }
385
386 /*
387 * Get the argument indexed by nextarg. If the argument table is
388 * built, use it to get the argument. If its not, get the next
389 * argument (and arguments must be gotten sequentially).
390 */
391 #define GETARG(type) \
392 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
393 (nextarg++, va_arg(ap, type)))
394
395 /*
396 * To extend shorts properly, we need both signed and unsigned
397 * argument extraction methods.
398 */
399 #define SARG() \
400 (flags&LONGINT ? GETARG(long) : \
401 flags&SHORTINT ? (long)(short)GETARG(int) : \
402 flags&CHARINT ? (long)(signed char)GETARG(int) : \
403 (long)GETARG(int))
404 #define UARG() \
405 (flags&LONGINT ? GETARG(u_long) : \
406 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
407 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
408 (u_long)GETARG(u_int))
409 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
410 #define SJARG() \
411 (flags&INTMAXT ? GETARG(intmax_t) : \
412 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
413 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
414 (intmax_t)GETARG(long long))
415 #define UJARG() \
416 (flags&INTMAXT ? GETARG(uintmax_t) : \
417 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
418 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
419 (uintmax_t)GETARG(unsigned long long))
420
421 /*
422 * Get * arguments, including the form *nn$. Preserve the nextarg
423 * that the argument can be gotten once the type is determined.
424 */
425 #define GETASTER(val) \
426 n2 = 0; \
427 cp = fmt; \
428 while (is_digit(*cp)) { \
429 n2 = 10 * n2 + to_digit(*cp); \
430 cp++; \
431 } \
432 if (*cp == '$') { \
433 int hold = nextarg; \
434 if (argtable == NULL) { \
435 argtable = statargtable; \
436 if (__find_arguments (fmt0, orgap, &argtable)) { \
437 ret = EOF; \
438 goto error; \
439 } \
440 } \
441 nextarg = n2; \
442 val = GETARG (int); \
443 nextarg = hold; \
444 fmt = ++cp; \
445 } else { \
446 val = GETARG (int); \
447 }
448
449 if (__use_xprintf > 0)
450 return (__xvprintf(fp, fmt0, ap));
451
452 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
453 if (prepwrite(fp) != 0) {
454 errno = EBADF;
455 return (EOF);
456 }
457
458 savserr = fp->_flags & __SERR;
459 fp->_flags &= ~__SERR;
460
461 convbuf = NULL;
462 fmt = (char *)fmt0;
463 argtable = NULL;
464 nextarg = 1;
465 va_copy(orgap, ap);
466 io_init(&io, fp);
467 ret = 0;
468 #ifndef NO_FLOATING_POINT
469 dtoaresult = NULL;
470 decimal_point = localeconv_l(locale)->decimal_point;
471 /* The overwhelmingly common case is decpt_len == 1. */
472 decpt_len = (decimal_point[1] == '\0' ? 1 : strlen(decimal_point));
473 #endif
474
475 /*
476 * Scan the format for conversions (`%' character).
477 */
478 for (;;) {
479 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
480 /* void */;
481 if ((n = fmt - cp) != 0) {
482 if ((unsigned)ret + n > INT_MAX) {
483 ret = EOF;
484 errno = EOVERFLOW;
485 goto error;
486 }
487 PRINT(cp, n);
488 ret += n;
489 }
490 if (ch == '\0')
491 goto done;
492 fmt++; /* skip over '%' */
493
494 flags = 0;
495 dprec = 0;
496 width = 0;
497 prec = -1;
498 gs.grouping = NULL;
499 sign = '\0';
500 ox[1] = '\0';
501
502 rflag: ch = *fmt++;
503 reswitch: switch (ch) {
504 case ' ':
505 /*-
506 * ``If the space and + flags both appear, the space
507 * flag will be ignored.''
508 * -- ANSI X3J11
509 */
510 if (!sign)
511 sign = ' ';
512 goto rflag;
513 case '#':
514 flags |= ALT;
515 goto rflag;
516 case '*':
517 /*-
518 * ``A negative field width argument is taken as a
519 * - flag followed by a positive field width.''
520 * -- ANSI X3J11
521 * They don't exclude field widths read from args.
522 */
523 GETASTER (width);
524 if (width >= 0)
525 goto rflag;
526 width = -width;
527 /* FALLTHROUGH */
528 case '-':
529 flags |= LADJUST;
530 goto rflag;
531 case '+':
532 sign = '+';
533 goto rflag;
534 case '\'':
535 flags |= GROUPING;
536 goto rflag;
537 case '.':
538 if ((ch = *fmt++) == '*') {
539 GETASTER (prec);
540 goto rflag;
541 }
542 prec = 0;
543 while (is_digit(ch)) {
544 prec = 10 * prec + to_digit(ch);
545 ch = *fmt++;
546 }
547 goto reswitch;
548 case '0':
549 /*-
550 * ``Note that 0 is taken as a flag, not as the
551 * beginning of a field width.''
552 * -- ANSI X3J11
553 */
554 flags |= ZEROPAD;
555 goto rflag;
556 case '1': case '2': case '3': case '4':
557 case '5': case '6': case '7': case '8': case '9':
558 n = 0;
559 do {
560 n = 10 * n + to_digit(ch);
561 ch = *fmt++;
562 } while (is_digit(ch));
563 if (ch == '$') {
564 nextarg = n;
565 if (argtable == NULL) {
566 argtable = statargtable;
567 if (__find_arguments (fmt0, orgap,
568 &argtable)) {
569 ret = EOF;
570 goto error;
571 }
572 }
573 goto rflag;
574 }
575 width = n;
576 goto reswitch;
577 #ifndef NO_FLOATING_POINT
578 case 'L':
579 flags |= LONGDBL;
580 goto rflag;
581 #endif
582 case 'h':
583 if (flags & SHORTINT) {
584 flags &= ~SHORTINT;
585 flags |= CHARINT;
586 } else
587 flags |= SHORTINT;
588 goto rflag;
589 case 'j':
590 flags |= INTMAXT;
591 goto rflag;
592 case 'l':
593 if (flags & LONGINT) {
594 flags &= ~LONGINT;
595 flags |= LLONGINT;
596 } else
597 flags |= LONGINT;
598 goto rflag;
599 case 'q':
600 flags |= LLONGINT; /* not necessarily */
601 goto rflag;
602 case 't':
603 flags |= PTRDIFFT;
604 goto rflag;
605 case 'w':
606 /*
607 * Fixed-width integer types. On all platforms we
608 * support, int8_t is equivalent to char, int16_t
609 * is equivalent to short, int32_t is equivalent
610 * to int, int64_t is equivalent to long long int.
611 * Furthermore, int_fast8_t, int_fast16_t and
612 * int_fast32_t are equivalent to int, and
613 * int_fast64_t is equivalent to long long int.
614 */
615 flags &= ~(CHARINT|SHORTINT|LONGINT|LLONGINT|INTMAXT);
616 if (fmt[0] == 'f') {
617 flags |= FASTINT;
618 fmt++;
619 } else {
620 flags &= ~FASTINT;
621 }
622 if (fmt[0] == '8') {
623 if (!(flags & FASTINT))
624 flags |= CHARINT;
625 else
626 /* no flag set = 32 */ ;
627 fmt += 1;
628 } else if (fmt[0] == '1' && fmt[1] == '6') {
629 if (!(flags & FASTINT))
630 flags |= SHORTINT;
631 else
632 /* no flag set = 32 */ ;
633 fmt += 2;
634 } else if (fmt[0] == '3' && fmt[1] == '2') {
635 /* no flag set = 32 */ ;
636 fmt += 2;
637 } else if (fmt[0] == '6' && fmt[1] == '4') {
638 flags |= LLONGINT;
639 fmt += 2;
640 } else {
641 if (flags & FASTINT) {
642 flags &= ~FASTINT;
643 fmt--;
644 }
645 goto invalid;
646 }
647 goto rflag;
648 case 'z':
649 flags |= SIZET;
650 goto rflag;
651 case 'B':
652 case 'b':
653 if (flags & INTMAX_SIZE)
654 ujval = UJARG();
655 else
656 ulval = UARG();
657 base = 2;
658 /* leading 0b/B only if non-zero */
659 if (flags & ALT &&
660 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
661 ox[1] = ch;
662 goto nosign;
663 break;
664 case 'C':
665 flags |= LONGINT;
666 /*FALLTHROUGH*/
667 case 'c':
668 if (flags & LONGINT) {
669 static const mbstate_t initial;
670 mbstate_t mbs;
671 size_t mbseqlen;
672
673 mbs = initial;
674 mbseqlen = wcrtomb(cp = buf,
675 (wchar_t)GETARG(wint_t), &mbs);
676 if (mbseqlen == (size_t)-1) {
677 fp->_flags |= __SERR;
678 goto error;
679 }
680 size = (int)mbseqlen;
681 } else {
682 *(cp = buf) = GETARG(int);
683 size = 1;
684 }
685 sign = '\0';
686 break;
687 case 'D':
688 flags |= LONGINT;
689 /*FALLTHROUGH*/
690 case 'd':
691 case 'i':
692 if (flags & INTMAX_SIZE) {
693 ujval = SJARG();
694 if ((intmax_t)ujval < 0) {
695 ujval = -ujval;
696 sign = '-';
697 }
698 } else {
699 ulval = SARG();
700 if ((long)ulval < 0) {
701 ulval = -ulval;
702 sign = '-';
703 }
704 }
705 base = 10;
706 goto number;
707 #ifndef NO_FLOATING_POINT
708 case 'a':
709 case 'A':
710 if (ch == 'a') {
711 ox[1] = 'x';
712 xdigs = xdigs_lower;
713 expchar = 'p';
714 } else {
715 ox[1] = 'X';
716 xdigs = xdigs_upper;
717 expchar = 'P';
718 }
719 if (prec >= 0)
720 prec++;
721 if (dtoaresult != NULL)
722 freedtoa(dtoaresult);
723 if (flags & LONGDBL) {
724 fparg.ldbl = GETARG(long double);
725 dtoaresult = cp =
726 __hldtoa(fparg.ldbl, xdigs, prec,
727 &expt, &signflag, &dtoaend);
728 } else {
729 fparg.dbl = GETARG(double);
730 dtoaresult = cp =
731 __hdtoa(fparg.dbl, xdigs, prec,
732 &expt, &signflag, &dtoaend);
733 }
734 if (prec < 0)
735 prec = dtoaend - cp;
736 if (expt == INT_MAX)
737 ox[1] = '\0';
738 goto fp_common;
739 case 'e':
740 case 'E':
741 expchar = ch;
742 if (prec < 0) /* account for digit before decpt */
743 prec = DEFPREC + 1;
744 else
745 prec++;
746 goto fp_begin;
747 case 'f':
748 case 'F':
749 expchar = '\0';
750 goto fp_begin;
751 case 'g':
752 case 'G':
753 expchar = ch - ('g' - 'e');
754 if (prec == 0)
755 prec = 1;
756 fp_begin:
757 if (prec < 0)
758 prec = DEFPREC;
759 if (dtoaresult != NULL)
760 freedtoa(dtoaresult);
761 if (flags & LONGDBL) {
762 fparg.ldbl = GETARG(long double);
763 dtoaresult = cp =
764 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
765 &expt, &signflag, &dtoaend);
766 } else {
767 fparg.dbl = GETARG(double);
768 dtoaresult = cp =
769 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
770 &expt, &signflag, &dtoaend);
771 if (expt == 9999)
772 expt = INT_MAX;
773 }
774 fp_common:
775 if (signflag)
776 sign = '-';
777 if (expt == INT_MAX) { /* inf or nan */
778 if (*cp == 'N') {
779 cp = (ch >= 'a') ? "nan" : "NAN";
780 sign = '\0';
781 } else
782 cp = (ch >= 'a') ? "inf" : "INF";
783 size = 3;
784 flags &= ~ZEROPAD;
785 break;
786 }
787 flags |= FPT;
788 ndig = dtoaend - cp;
789 if (ch == 'g' || ch == 'G') {
790 if (expt > -4 && expt <= prec) {
791 /* Make %[gG] smell like %[fF] */
792 expchar = '\0';
793 if (flags & ALT)
794 prec -= expt;
795 else
796 prec = ndig - expt;
797 if (prec < 0)
798 prec = 0;
799 } else {
800 /*
801 * Make %[gG] smell like %[eE], but
802 * trim trailing zeroes if no # flag.
803 */
804 if (!(flags & ALT))
805 prec = ndig;
806 }
807 }
808 if (expchar) {
809 expsize = exponent(expstr, expt - 1, expchar);
810 size = expsize + prec;
811 if (prec > 1 || flags & ALT)
812 size += decpt_len;
813 } else {
814 /* space for digits before decimal point */
815 if (expt > 0)
816 size = expt;
817 else /* "0" */
818 size = 1;
819 /* space for decimal pt and following digits */
820 if (prec || flags & ALT)
821 size += prec + decpt_len;
822 if ((flags & GROUPING) && expt > 0)
823 size += grouping_init(&gs, expt, locale);
824 }
825 break;
826 #endif /* !NO_FLOATING_POINT */
827 case 'm':
828 error = __strerror_rl(serrno, errnomsg,
829 sizeof(errnomsg), locale);
830 cp = error == 0 ? errnomsg : "<strerror failure>";
831 size = (prec >= 0) ? strnlen(cp, prec) : strlen(cp);
832 sign = '\0';
833 break;
834 case 'n':
835 /*
836 * Assignment-like behavior is specified if the
837 * value overflows or is otherwise unrepresentable.
838 * C99 says to use `signed char' for %hhn conversions.
839 */
840 if (flags & LLONGINT)
841 *GETARG(long long *) = ret;
842 else if (flags & SIZET)
843 *GETARG(ssize_t *) = (ssize_t)ret;
844 else if (flags & PTRDIFFT)
845 *GETARG(ptrdiff_t *) = ret;
846 else if (flags & INTMAXT)
847 *GETARG(intmax_t *) = ret;
848 else if (flags & LONGINT)
849 *GETARG(long *) = ret;
850 else if (flags & SHORTINT)
851 *GETARG(short *) = ret;
852 else if (flags & CHARINT)
853 *GETARG(signed char *) = ret;
854 else
855 *GETARG(int *) = ret;
856 continue; /* no output */
857 case 'O':
858 flags |= LONGINT;
859 /*FALLTHROUGH*/
860 case 'o':
861 if (flags & INTMAX_SIZE)
862 ujval = UJARG();
863 else
864 ulval = UARG();
865 base = 8;
866 goto nosign;
867 case 'p':
868 /*-
869 * ``The argument shall be a pointer to void. The
870 * value of the pointer is converted to a sequence
871 * of printable characters, in an implementation-
872 * defined manner.''
873 * -- ANSI X3J11
874 */
875 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
876 base = 16;
877 xdigs = xdigs_lower;
878 flags = flags | INTMAXT;
879 ox[1] = 'x';
880 goto nosign;
881 case 'S':
882 flags |= LONGINT;
883 /*FALLTHROUGH*/
884 case 's':
885 if (flags & LONGINT) {
886 wchar_t *wcp;
887
888 if (convbuf != NULL)
889 free(convbuf);
890 if ((wcp = GETARG(wchar_t *)) == NULL)
891 cp = "(null)";
892 else {
893 convbuf = __wcsconv(wcp, prec);
894 if (convbuf == NULL) {
895 fp->_flags |= __SERR;
896 goto error;
897 }
898 cp = convbuf;
899 }
900 } else if ((cp = GETARG(char *)) == NULL)
901 cp = "(null)";
902 size = (prec >= 0) ? strnlen(cp, prec) : strlen(cp);
903 sign = '\0';
904 break;
905 case 'U':
906 flags |= LONGINT;
907 /*FALLTHROUGH*/
908 case 'u':
909 if (flags & INTMAX_SIZE)
910 ujval = UJARG();
911 else
912 ulval = UARG();
913 base = 10;
914 goto nosign;
915 case 'X':
916 xdigs = xdigs_upper;
917 goto hex;
918 case 'x':
919 xdigs = xdigs_lower;
920 hex:
921 if (flags & INTMAX_SIZE)
922 ujval = UJARG();
923 else
924 ulval = UARG();
925 base = 16;
926 /* leading 0x/X only if non-zero */
927 if (flags & ALT &&
928 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
929 ox[1] = ch;
930
931 flags &= ~GROUPING;
932 /* unsigned conversions */
933 nosign: sign = '\0';
934 /*-
935 * ``... diouXx conversions ... if a precision is
936 * specified, the 0 flag will be ignored.''
937 * -- ANSI X3J11
938 */
939 number: if ((dprec = prec) >= 0)
940 flags &= ~ZEROPAD;
941
942 /*-
943 * ``The result of converting a zero value with an
944 * explicit precision of zero is no characters.''
945 * -- ANSI X3J11
946 *
947 * ``The C Standard is clear enough as is. The call
948 * printf("%#.0o", 0) should print 0.''
949 * -- Defect Report #151
950 */
951 cp = buf + BUF;
952 if (flags & INTMAX_SIZE) {
953 if (ujval != 0 || prec != 0 ||
954 (flags & ALT && base == 8))
955 cp = __ujtoa(ujval, cp, base,
956 flags & ALT, xdigs);
957 } else {
958 if (ulval != 0 || prec != 0 ||
959 (flags & ALT && base == 8))
960 cp = __ultoa(ulval, cp, base,
961 flags & ALT, xdigs);
962 }
963 size = buf + BUF - cp;
964 if (size > BUF) /* should never happen */
965 abort();
966 if ((flags & GROUPING) && size != 0)
967 size += grouping_init(&gs, size, locale);
968 break;
969 default: /* "%?" prints ?, unless ? is NUL */
970 if (ch == '\0')
971 goto done;
972 invalid:
973 /* pretend it was %c with argument ch */
974 cp = buf;
975 *cp = ch;
976 size = 1;
977 sign = '\0';
978 break;
979 }
980
981 /*
982 * All reasonable formats wind up here. At this point, `cp'
983 * points to a string which (if not flags&LADJUST) should be
984 * padded out to `width' places. If flags&ZEROPAD, it should
985 * first be prefixed by any sign or other prefix; otherwise,
986 * it should be blank padded before the prefix is emitted.
987 * After any left-hand padding and prefixing, emit zeroes
988 * required by a decimal [diouxX] precision, then print the
989 * string proper, then emit zeroes required by any leftover
990 * floating precision; finally, if LADJUST, pad with blanks.
991 *
992 * Compute actual size, so we know how much to pad.
993 * size excludes decimal prec; realsz includes it.
994 */
995 realsz = dprec > size ? dprec : size;
996 if (sign)
997 realsz++;
998 if (ox[1])
999 realsz += 2;
1000
1001 prsize = width > realsz ? width : realsz;
1002 if ((unsigned)ret + prsize > INT_MAX) {
1003 ret = EOF;
1004 errno = EOVERFLOW;
1005 goto error;
1006 }
1007
1008 /* right-adjusting blank padding */
1009 if ((flags & (LADJUST|ZEROPAD)) == 0)
1010 PAD(width - realsz, blanks);
1011
1012 /* prefix */
1013 if (sign)
1014 PRINT(&sign, 1);
1015
1016 if (ox[1]) { /* ox[1] is either x, X, or \0 */
1017 ox[0] = '0';
1018 PRINT(ox, 2);
1019 }
1020
1021 /* right-adjusting zero padding */
1022 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1023 PAD(width - realsz, zeroes);
1024
1025 /* the string or number proper */
1026 #ifndef NO_FLOATING_POINT
1027 if ((flags & FPT) == 0) {
1028 #endif
1029 /* leading zeroes from decimal precision */
1030 PAD(dprec - size, zeroes);
1031 if (gs.grouping) {
1032 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
1033 goto error;
1034 } else {
1035 PRINT(cp, size);
1036 }
1037 #ifndef NO_FLOATING_POINT
1038 } else { /* glue together f_p fragments */
1039 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1040 if (expt <= 0) {
1041 PRINT(zeroes, 1);
1042 if (prec || flags & ALT)
1043 PRINT(decimal_point,decpt_len);
1044 PAD(-expt, zeroes);
1045 /* already handled initial 0's */
1046 prec += expt;
1047 } else {
1048 if (gs.grouping) {
1049 n = grouping_print(&gs, &io,
1050 cp, dtoaend, locale);
1051 if (n < 0)
1052 goto error;
1053 cp += n;
1054 } else {
1055 PRINTANDPAD(cp, dtoaend,
1056 expt, zeroes);
1057 cp += expt;
1058 }
1059 if (prec || flags & ALT)
1060 PRINT(decimal_point,decpt_len);
1061 }
1062 PRINTANDPAD(cp, dtoaend, prec, zeroes);
1063 } else { /* %[eE] or sufficiently long %[gG] */
1064 if (prec > 1 || flags & ALT) {
1065 PRINT(cp++, 1);
1066 PRINT(decimal_point, decpt_len);
1067 PRINT(cp, ndig-1);
1068 PAD(prec - ndig, zeroes);
1069 } else /* XeYYY */
1070 PRINT(cp, 1);
1071 PRINT(expstr, expsize);
1072 }
1073 }
1074 #endif
1075 /* left-adjusting padding (always blank) */
1076 if (flags & LADJUST)
1077 PAD(width - realsz, blanks);
1078
1079 /* finally, adjust ret */
1080 ret += prsize;
1081
1082 FLUSH(); /* copy out the I/O vectors */
1083 }
1084 done:
1085 FLUSH();
1086 error:
1087 va_end(orgap);
1088 #ifndef NO_FLOATING_POINT
1089 if (dtoaresult != NULL)
1090 freedtoa(dtoaresult);
1091 #endif
1092 if (convbuf != NULL)
1093 free(convbuf);
1094 if (__sferror(fp))
1095 ret = EOF;
1096 else
1097 fp->_flags |= savserr;
1098 if ((argtable != NULL) && (argtable != statargtable))
1099 free (argtable);
1100 return (ret);
1101 /* NOTREACHED */
1102 }
1103
1104