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 #if 0
41 #if defined(LIBC_SCCS) && !defined(lint)
42 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
43 #endif /* LIBC_SCCS and not lint */
44 #endif
45 #include <sys/cdefs.h>
46 /*
47 * Actual wprintf innards.
48 *
49 * Avoid making gratuitous changes to this source file; it should be kept
50 * as close as possible to vfprintf.c for ease of maintenance.
51 */
52
53 #include "namespace.h"
54 #include <sys/types.h>
55
56 #include <ctype.h>
57 #include <errno.h>
58 #include <limits.h>
59 #include <locale.h>
60 #include <stdarg.h>
61 #include <stddef.h>
62 #include <stdint.h>
63 #include <stdio.h>
64 #include <stdlib.h>
65 #include <string.h>
66 #include <wchar.h>
67 #include <wctype.h>
68 #include "un-namespace.h"
69
70 #include "libc_private.h"
71 #include "local.h"
72 #include "fvwrite.h"
73 #include "printflocal.h"
74 #include "xlocale_private.h"
75
76 static int __sprint(FILE *, struct __suio *, locale_t);
77 static int __sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline;
78 static wint_t __xfputwc(wchar_t, FILE *, locale_t);
79 static wchar_t *__mbsconv(char *, int);
80
81 #define CHAR wchar_t
82 #include "printfcommon.h"
83
84 struct grouping_state {
85 wchar_t thousands_sep; /* locale-specific thousands separator */
86 const char *grouping; /* locale-specific numeric grouping rules */
87 int lead; /* sig figs before decimal or group sep */
88 int nseps; /* number of group separators with ' */
89 int nrepeats; /* number of repeats of the last group */
90 };
91
92 static const mbstate_t initial_mbs;
93
94 static inline wchar_t
get_decpt(locale_t locale)95 get_decpt(locale_t locale)
96 {
97 mbstate_t mbs;
98 wchar_t decpt;
99 int nconv;
100
101 mbs = initial_mbs;
102 nconv = mbrtowc(&decpt, localeconv_l(locale)->decimal_point, MB_CUR_MAX, &mbs);
103 if (nconv == (size_t)-1 || nconv == (size_t)-2)
104 decpt = '.'; /* failsafe */
105 return (decpt);
106 }
107
108 static inline wchar_t
get_thousep(locale_t locale)109 get_thousep(locale_t locale)
110 {
111 mbstate_t mbs;
112 wchar_t thousep;
113 int nconv;
114
115 mbs = initial_mbs;
116 nconv = mbrtowc(&thousep, localeconv_l(locale)->thousands_sep,
117 MB_CUR_MAX, &mbs);
118 if (nconv == (size_t)-1 || nconv == (size_t)-2)
119 thousep = '\0'; /* failsafe */
120 return (thousep);
121 }
122
123 /*
124 * Initialize the thousands' grouping state in preparation to print a
125 * number with ndigits digits. This routine returns the total number
126 * of wide characters that will be printed.
127 */
128 static int
grouping_init(struct grouping_state * gs,int ndigits,locale_t locale)129 grouping_init(struct grouping_state *gs, int ndigits, locale_t locale)
130 {
131
132 gs->grouping = localeconv_l(locale)->grouping;
133 gs->thousands_sep = get_thousep(locale);
134
135 gs->nseps = gs->nrepeats = 0;
136 gs->lead = ndigits;
137 while (*gs->grouping != CHAR_MAX) {
138 if (gs->lead <= *gs->grouping)
139 break;
140 gs->lead -= *gs->grouping;
141 if (*(gs->grouping+1)) {
142 gs->nseps++;
143 gs->grouping++;
144 } else
145 gs->nrepeats++;
146 }
147 return (gs->nseps + gs->nrepeats);
148 }
149
150 /*
151 * Print a number with thousands' separators.
152 */
153 static int
grouping_print(struct grouping_state * gs,struct io_state * iop,const CHAR * cp,const CHAR * ep,locale_t locale)154 grouping_print(struct grouping_state *gs, struct io_state *iop,
155 const CHAR *cp, const CHAR *ep, locale_t locale)
156 {
157 const CHAR *cp0 = cp;
158
159 if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
160 return (-1);
161 cp += gs->lead;
162 while (gs->nseps > 0 || gs->nrepeats > 0) {
163 if (gs->nrepeats > 0)
164 gs->nrepeats--;
165 else {
166 gs->grouping--;
167 gs->nseps--;
168 }
169 if (io_print(iop, &gs->thousands_sep, 1, locale))
170 return (-1);
171 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
172 return (-1);
173 cp += *gs->grouping;
174 }
175 if (cp > ep)
176 cp = ep;
177 return (cp - cp0);
178 }
179
180
181 /*
182 * Flush out all the vectors defined by the given uio,
183 * then reset it so that it can be reused.
184 *
185 * XXX The fact that we do this a character at a time and convert to a
186 * multibyte character sequence even if the destination is a wide
187 * string eclipses the benefits of buffering.
188 */
189 static int
__sprint(FILE * fp,struct __suio * uio,locale_t locale)190 __sprint(FILE *fp, struct __suio *uio, locale_t locale)
191 {
192 struct __siov *iov;
193 wchar_t *p;
194 int i, len;
195
196 iov = uio->uio_iov;
197 for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) {
198 p = (wchar_t *)iov->iov_base;
199 len = iov->iov_len;
200 for (i = 0; i < len; i++) {
201 if (__xfputwc(p[i], fp, locale) == WEOF)
202 return (-1);
203 }
204 }
205 uio->uio_iovcnt = 0;
206 return (0);
207 }
208
209 /*
210 * Helper function for `fprintf to unbuffered unix file': creates a
211 * temporary buffer. We only work on write-only files; this avoids
212 * worries about ungetc buffers and so forth.
213 */
214 static int
__sbprintf(FILE * fp,locale_t locale,const wchar_t * fmt,va_list ap)215 __sbprintf(FILE *fp, locale_t locale, const wchar_t *fmt, va_list ap)
216 {
217 int ret;
218 FILE fake;
219 unsigned char buf[BUFSIZ];
220
221 /* XXX This is probably not needed. */
222 if (prepwrite(fp) != 0)
223 return (EOF);
224
225 /* copy the important variables */
226 fake._flags = fp->_flags & ~__SNBF;
227 fake._file = fp->_file;
228 fake._cookie = fp->_cookie;
229 fake._write = fp->_write;
230 fake._orientation = fp->_orientation;
231 fake._mbstate = fp->_mbstate;
232
233 /* set up the buffer */
234 fake._bf._base = fake._p = buf;
235 fake._bf._size = fake._w = sizeof(buf);
236 fake._lbfsize = 0; /* not actually used, but Just In Case */
237
238 /* do the work, then copy any error status */
239 ret = __vfwprintf(&fake, locale, fmt, ap);
240 if (ret >= 0 && __fflush(&fake))
241 ret = WEOF;
242 if (fake._flags & __SERR)
243 fp->_flags |= __SERR;
244 return (ret);
245 }
246
247 /*
248 * Like __fputwc, but handles fake string (__SSTR) files properly.
249 * File must already be locked.
250 */
251 static wint_t
__xfputwc(wchar_t wc,FILE * fp,locale_t locale)252 __xfputwc(wchar_t wc, FILE *fp, locale_t locale)
253 {
254 mbstate_t mbs;
255 char buf[MB_LEN_MAX];
256 struct __suio uio;
257 struct __siov iov;
258 size_t len;
259
260 if ((fp->_flags & __SSTR) == 0)
261 return (__fputwc(wc, fp, locale));
262
263 mbs = initial_mbs;
264 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) {
265 fp->_flags |= __SERR;
266 return (WEOF);
267 }
268 uio.uio_iov = &iov;
269 uio.uio_resid = len;
270 uio.uio_iovcnt = 1;
271 iov.iov_base = buf;
272 iov.iov_len = len;
273 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
274 }
275
276 /*
277 * Convert a multibyte character string argument for the %s format to a wide
278 * string representation. ``prec'' specifies the maximum number of bytes
279 * to output. If ``prec'' is greater than or equal to zero, we can't assume
280 * that the multibyte char. string ends in a null character.
281 */
282 static wchar_t *
__mbsconv(char * mbsarg,int prec)283 __mbsconv(char *mbsarg, int prec)
284 {
285 mbstate_t mbs;
286 wchar_t *convbuf, *wcp;
287 const char *p;
288 size_t insize, nchars, nconv;
289
290 if (mbsarg == NULL)
291 return (NULL);
292
293 /*
294 * Supplied argument is a multibyte string; convert it to wide
295 * characters first.
296 */
297 if (prec >= 0) {
298 /*
299 * String is not guaranteed to be NUL-terminated. Find the
300 * number of characters to print.
301 */
302 p = mbsarg;
303 insize = nchars = nconv = 0;
304 mbs = initial_mbs;
305 while (nchars != (size_t)prec) {
306 nconv = mbrlen(p, MB_CUR_MAX, &mbs);
307 if (nconv == 0 || nconv == (size_t)-1 ||
308 nconv == (size_t)-2)
309 break;
310 p += nconv;
311 nchars++;
312 insize += nconv;
313 }
314 if (nconv == (size_t)-1 || nconv == (size_t)-2)
315 return (NULL);
316 } else {
317 insize = strlen(mbsarg);
318 nconv = 0;
319 }
320
321 /*
322 * Allocate buffer for the result and perform the conversion,
323 * converting at most `size' bytes of the input multibyte string to
324 * wide characters for printing.
325 */
326 convbuf = malloc((insize + 1) * sizeof(*convbuf));
327 if (convbuf == NULL)
328 return (NULL);
329 wcp = convbuf;
330 p = mbsarg;
331 mbs = initial_mbs;
332 while (insize != 0) {
333 nconv = mbrtowc(wcp, p, insize, &mbs);
334 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
335 break;
336 wcp++;
337 p += nconv;
338 insize -= nconv;
339 }
340 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
341 free(convbuf);
342 return (NULL);
343 }
344 *wcp = L'\0';
345
346 return (convbuf);
347 }
348
349 /*
350 * MT-safe version
351 */
352 int
vfwprintf_l(FILE * __restrict fp,locale_t locale,const wchar_t * __restrict fmt0,va_list ap)353 vfwprintf_l(FILE * __restrict fp, locale_t locale,
354 const wchar_t * __restrict fmt0, va_list ap)
355
356 {
357 int ret;
358 FIX_LOCALE(locale);
359 FLOCKFILE_CANCELSAFE(fp);
360 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
361 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
362 fp->_file >= 0)
363 ret = __sbprintf(fp, locale, fmt0, ap);
364 else
365 ret = __vfwprintf(fp, locale, fmt0, ap);
366 FUNLOCKFILE_CANCELSAFE();
367 return (ret);
368 }
369 int
vfwprintf(FILE * __restrict fp,const wchar_t * __restrict fmt0,va_list ap)370 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
371 {
372 return vfwprintf_l(fp, __get_locale(), fmt0, ap);
373 }
374
375 /*
376 * The size of the buffer we use as scratch space for integer
377 * conversions, among other things. We need enough space to
378 * write a uintmax_t in octal (plus one byte).
379 */
380 #if UINTMAX_MAX <= UINT64_MAX
381 #define BUF 32
382 #else
383 #error "BUF must be large enough to format a uintmax_t"
384 #endif
385
386 /*
387 * Non-MT-safe version
388 */
389 int
__vfwprintf(FILE * fp,locale_t locale,const wchar_t * fmt0,va_list ap)390 __vfwprintf(FILE *fp, locale_t locale, const wchar_t *fmt0, va_list ap)
391 {
392 wchar_t *fmt; /* format string */
393 wchar_t ch; /* character from fmt */
394 int n, n2; /* handy integer (short term usage) */
395 wchar_t *cp; /* handy char pointer (short term usage) */
396 int flags; /* flags as above */
397 int ret; /* return value accumulator */
398 int width; /* width from format (%8d), or 0 */
399 int prec; /* precision from format; <0 for N/A */
400 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
401 struct grouping_state gs; /* thousands' grouping info */
402 #ifndef NO_FLOATING_POINT
403 /*
404 * We can decompose the printed representation of floating
405 * point numbers into several parts, some of which may be empty:
406 *
407 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
408 * A B ---C--- D E F
409 *
410 * A: 'sign' holds this value if present; '\0' otherwise
411 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
412 * C: cp points to the string MMMNNN. Leading and trailing
413 * zeros are not in the string and must be added.
414 * D: expchar holds this character; '\0' if no exponent, e.g. %f
415 * F: at least two digits for decimal, at least one digit for hex
416 */
417 wchar_t decimal_point; /* locale specific decimal point */
418 int signflag; /* true if float is negative */
419 union { /* floating point arguments %[aAeEfFgG] */
420 double dbl;
421 long double ldbl;
422 } fparg;
423 int expt; /* integer value of exponent */
424 char expchar; /* exponent character: [eEpP\0] */
425 char *dtoaend; /* pointer to end of converted digits */
426 int expsize; /* character count for expstr */
427 int ndig; /* actual number of digits returned by dtoa */
428 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
429 char *dtoaresult; /* buffer allocated by dtoa */
430 #endif
431 u_long ulval; /* integer arguments %[diouxX] */
432 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
433 int base; /* base for [diouxX] conversion */
434 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
435 int realsz; /* field size expanded by dprec, sign, etc */
436 int size; /* size of converted field or string */
437 int prsize; /* max size of printed field */
438 const char *xdigs; /* digits for [xX] conversion */
439 struct io_state io; /* I/O buffering state */
440 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
441 wchar_t ox[2]; /* space for 0x hex-prefix */
442 union arg *argtable; /* args, built due to positional arg */
443 union arg statargtable [STATIC_ARG_TBL_SIZE];
444 int nextarg; /* 1-based argument index */
445 va_list orgap; /* original argument pointer */
446 wchar_t *convbuf; /* multibyte to wide conversion result */
447 int savserr;
448
449 static const char xdigs_lower[16] = "0123456789abcdef";
450 static const char xdigs_upper[16] = "0123456789ABCDEF";
451
452 /* BEWARE, these `goto error' on error. */
453 #define PRINT(ptr, len) do { \
454 if (io_print(&io, (ptr), (len), locale)) \
455 goto error; \
456 } while (0)
457 #define PAD(howmany, with) { \
458 if (io_pad(&io, (howmany), (with), locale)) \
459 goto error; \
460 }
461 #define PRINTANDPAD(p, ep, len, with) { \
462 if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
463 goto error; \
464 }
465 #define FLUSH() { \
466 if (io_flush(&io, locale)) \
467 goto error; \
468 }
469
470 /*
471 * Get the argument indexed by nextarg. If the argument table is
472 * built, use it to get the argument. If its not, get the next
473 * argument (and arguments must be gotten sequentially).
474 */
475 #define GETARG(type) \
476 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
477 (nextarg++, va_arg(ap, type)))
478
479 /*
480 * To extend shorts properly, we need both signed and unsigned
481 * argument extraction methods.
482 */
483 #define SARG() \
484 (flags&LONGINT ? GETARG(long) : \
485 flags&SHORTINT ? (long)(short)GETARG(int) : \
486 flags&CHARINT ? (long)(signed char)GETARG(int) : \
487 (long)GETARG(int))
488 #define UARG() \
489 (flags&LONGINT ? GETARG(u_long) : \
490 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
491 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
492 (u_long)GETARG(u_int))
493 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
494 #define SJARG() \
495 (flags&INTMAXT ? GETARG(intmax_t) : \
496 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
497 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
498 (intmax_t)GETARG(long long))
499 #define UJARG() \
500 (flags&INTMAXT ? GETARG(uintmax_t) : \
501 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
502 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
503 (uintmax_t)GETARG(unsigned long long))
504
505 /*
506 * Get * arguments, including the form *nn$. Preserve the nextarg
507 * that the argument can be gotten once the type is determined.
508 */
509 #define GETASTER(val) \
510 n2 = 0; \
511 cp = fmt; \
512 while (is_digit(*cp)) { \
513 n2 = 10 * n2 + to_digit(*cp); \
514 cp++; \
515 } \
516 if (*cp == '$') { \
517 int hold = nextarg; \
518 if (argtable == NULL) { \
519 argtable = statargtable; \
520 if (__find_warguments (fmt0, orgap, &argtable)) { \
521 ret = EOF; \
522 goto error; \
523 } \
524 } \
525 nextarg = n2; \
526 val = GETARG (int); \
527 nextarg = hold; \
528 fmt = ++cp; \
529 } else { \
530 val = GETARG (int); \
531 }
532
533
534 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
535 if (prepwrite(fp) != 0) {
536 errno = EBADF;
537 return (EOF);
538 }
539
540 savserr = fp->_flags & __SERR;
541 fp->_flags &= ~__SERR;
542
543 convbuf = NULL;
544 fmt = (wchar_t *)fmt0;
545 argtable = NULL;
546 nextarg = 1;
547 va_copy(orgap, ap);
548 io_init(&io, fp);
549 ret = 0;
550 #ifndef NO_FLOATING_POINT
551 decimal_point = get_decpt(locale);
552 #endif
553
554 /*
555 * Scan the format for conversions (`%' character).
556 */
557 for (;;) {
558 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
559 /* void */;
560 if ((n = fmt - cp) != 0) {
561 if ((unsigned)ret + n > INT_MAX) {
562 ret = EOF;
563 errno = EOVERFLOW;
564 goto error;
565 }
566 PRINT(cp, n);
567 ret += n;
568 }
569 if (ch == '\0')
570 goto done;
571 fmt++; /* skip over '%' */
572
573 flags = 0;
574 dprec = 0;
575 width = 0;
576 prec = -1;
577 gs.grouping = NULL;
578 sign = '\0';
579 ox[1] = '\0';
580
581 rflag: ch = *fmt++;
582 reswitch: switch (ch) {
583 case ' ':
584 /*-
585 * ``If the space and + flags both appear, the space
586 * flag will be ignored.''
587 * -- ANSI X3J11
588 */
589 if (!sign)
590 sign = ' ';
591 goto rflag;
592 case '#':
593 flags |= ALT;
594 goto rflag;
595 case '*':
596 /*-
597 * ``A negative field width argument is taken as a
598 * - flag followed by a positive field width.''
599 * -- ANSI X3J11
600 * They don't exclude field widths read from args.
601 */
602 GETASTER (width);
603 if (width >= 0)
604 goto rflag;
605 width = -width;
606 /* FALLTHROUGH */
607 case '-':
608 flags |= LADJUST;
609 goto rflag;
610 case '+':
611 sign = '+';
612 goto rflag;
613 case '\'':
614 flags |= GROUPING;
615 goto rflag;
616 case '.':
617 if ((ch = *fmt++) == '*') {
618 GETASTER (prec);
619 goto rflag;
620 }
621 prec = 0;
622 while (is_digit(ch)) {
623 prec = 10 * prec + to_digit(ch);
624 ch = *fmt++;
625 }
626 goto reswitch;
627 case '0':
628 /*-
629 * ``Note that 0 is taken as a flag, not as the
630 * beginning of a field width.''
631 * -- ANSI X3J11
632 */
633 flags |= ZEROPAD;
634 goto rflag;
635 case '1': case '2': case '3': case '4':
636 case '5': case '6': case '7': case '8': case '9':
637 n = 0;
638 do {
639 n = 10 * n + to_digit(ch);
640 ch = *fmt++;
641 } while (is_digit(ch));
642 if (ch == '$') {
643 nextarg = n;
644 if (argtable == NULL) {
645 argtable = statargtable;
646 if (__find_warguments (fmt0, orgap,
647 &argtable)) {
648 ret = EOF;
649 goto error;
650 }
651 }
652 goto rflag;
653 }
654 width = n;
655 goto reswitch;
656 #ifndef NO_FLOATING_POINT
657 case 'L':
658 flags |= LONGDBL;
659 goto rflag;
660 #endif
661 case 'h':
662 if (flags & SHORTINT) {
663 flags &= ~SHORTINT;
664 flags |= CHARINT;
665 } else
666 flags |= SHORTINT;
667 goto rflag;
668 case 'j':
669 flags |= INTMAXT;
670 goto rflag;
671 case 'l':
672 if (flags & LONGINT) {
673 flags &= ~LONGINT;
674 flags |= LLONGINT;
675 } else
676 flags |= LONGINT;
677 goto rflag;
678 case 'q':
679 flags |= LLONGINT; /* not necessarily */
680 goto rflag;
681 case 't':
682 flags |= PTRDIFFT;
683 goto rflag;
684 case 'z':
685 flags |= SIZET;
686 goto rflag;
687 case 'C':
688 flags |= LONGINT;
689 /*FALLTHROUGH*/
690 case 'c':
691 if (flags & LONGINT)
692 *(cp = buf) = (wchar_t)GETARG(wint_t);
693 else
694 *(cp = buf) = (wchar_t)btowc(GETARG(int));
695 size = 1;
696 sign = '\0';
697 break;
698 case 'D':
699 flags |= LONGINT;
700 /*FALLTHROUGH*/
701 case 'd':
702 case 'i':
703 if (flags & INTMAX_SIZE) {
704 ujval = SJARG();
705 if ((intmax_t)ujval < 0) {
706 ujval = -ujval;
707 sign = '-';
708 }
709 } else {
710 ulval = SARG();
711 if ((long)ulval < 0) {
712 ulval = -ulval;
713 sign = '-';
714 }
715 }
716 base = 10;
717 goto number;
718 #ifndef NO_FLOATING_POINT
719 case 'a':
720 case 'A':
721 if (ch == 'a') {
722 ox[1] = 'x';
723 xdigs = xdigs_lower;
724 expchar = 'p';
725 } else {
726 ox[1] = 'X';
727 xdigs = xdigs_upper;
728 expchar = 'P';
729 }
730 if (prec >= 0)
731 prec++;
732 if (flags & LONGDBL) {
733 fparg.ldbl = GETARG(long double);
734 dtoaresult =
735 __hldtoa(fparg.ldbl, xdigs, prec,
736 &expt, &signflag, &dtoaend);
737 } else {
738 fparg.dbl = GETARG(double);
739 dtoaresult =
740 __hdtoa(fparg.dbl, xdigs, prec,
741 &expt, &signflag, &dtoaend);
742 }
743 if (prec < 0)
744 prec = dtoaend - dtoaresult;
745 if (expt == INT_MAX)
746 ox[1] = '\0';
747 if (convbuf != NULL)
748 free(convbuf);
749 ndig = dtoaend - dtoaresult;
750 cp = convbuf = __mbsconv(dtoaresult, -1);
751 freedtoa(dtoaresult);
752 goto fp_common;
753 case 'e':
754 case 'E':
755 expchar = ch;
756 if (prec < 0) /* account for digit before decpt */
757 prec = DEFPREC + 1;
758 else
759 prec++;
760 goto fp_begin;
761 case 'f':
762 case 'F':
763 expchar = '\0';
764 goto fp_begin;
765 case 'g':
766 case 'G':
767 expchar = ch - ('g' - 'e');
768 if (prec == 0)
769 prec = 1;
770 fp_begin:
771 if (prec < 0)
772 prec = DEFPREC;
773 if (convbuf != NULL)
774 free(convbuf);
775 if (flags & LONGDBL) {
776 fparg.ldbl = GETARG(long double);
777 dtoaresult =
778 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
779 &expt, &signflag, &dtoaend);
780 } else {
781 fparg.dbl = GETARG(double);
782 dtoaresult =
783 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
784 &expt, &signflag, &dtoaend);
785 if (expt == 9999)
786 expt = INT_MAX;
787 }
788 ndig = dtoaend - dtoaresult;
789 cp = convbuf = __mbsconv(dtoaresult, -1);
790 freedtoa(dtoaresult);
791 fp_common:
792 if (signflag)
793 sign = '-';
794 if (expt == INT_MAX) { /* inf or nan */
795 if (*cp == 'N') {
796 cp = (ch >= 'a') ? L"nan" : L"NAN";
797 sign = '\0';
798 } else
799 cp = (ch >= 'a') ? L"inf" : L"INF";
800 size = 3;
801 flags &= ~ZEROPAD;
802 break;
803 }
804 flags |= FPT;
805 if (ch == 'g' || ch == 'G') {
806 if (expt > -4 && expt <= prec) {
807 /* Make %[gG] smell like %[fF] */
808 expchar = '\0';
809 if (flags & ALT)
810 prec -= expt;
811 else
812 prec = ndig - expt;
813 if (prec < 0)
814 prec = 0;
815 } else {
816 /*
817 * Make %[gG] smell like %[eE], but
818 * trim trailing zeroes if no # flag.
819 */
820 if (!(flags & ALT))
821 prec = ndig;
822 }
823 }
824 if (expchar) {
825 expsize = exponent(expstr, expt - 1, expchar);
826 size = expsize + prec;
827 if (prec > 1 || flags & ALT)
828 ++size;
829 } else {
830 /* space for digits before decimal point */
831 if (expt > 0)
832 size = expt;
833 else /* "0" */
834 size = 1;
835 /* space for decimal pt and following digits */
836 if (prec || flags & ALT)
837 size += prec + 1;
838 if ((flags & GROUPING) && expt > 0)
839 size += grouping_init(&gs, expt, locale);
840 }
841 break;
842 #endif /* !NO_FLOATING_POINT */
843 case 'n':
844 /*
845 * Assignment-like behavior is specified if the
846 * value overflows or is otherwise unrepresentable.
847 * C99 says to use `signed char' for %hhn conversions.
848 */
849 if (flags & LLONGINT)
850 *GETARG(long long *) = ret;
851 else if (flags & SIZET)
852 *GETARG(ssize_t *) = (ssize_t)ret;
853 else if (flags & PTRDIFFT)
854 *GETARG(ptrdiff_t *) = ret;
855 else if (flags & INTMAXT)
856 *GETARG(intmax_t *) = ret;
857 else if (flags & LONGINT)
858 *GETARG(long *) = ret;
859 else if (flags & SHORTINT)
860 *GETARG(short *) = ret;
861 else if (flags & CHARINT)
862 *GETARG(signed char *) = ret;
863 else
864 *GETARG(int *) = ret;
865 continue; /* no output */
866 case 'O':
867 flags |= LONGINT;
868 /*FALLTHROUGH*/
869 case 'o':
870 if (flags & INTMAX_SIZE)
871 ujval = UJARG();
872 else
873 ulval = UARG();
874 base = 8;
875 goto nosign;
876 case 'p':
877 /*-
878 * ``The argument shall be a pointer to void. The
879 * value of the pointer is converted to a sequence
880 * of printable characters, in an implementation-
881 * defined manner.''
882 * -- ANSI X3J11
883 */
884 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
885 base = 16;
886 xdigs = xdigs_lower;
887 flags = flags | INTMAXT;
888 ox[1] = 'x';
889 goto nosign;
890 case 'S':
891 flags |= LONGINT;
892 /*FALLTHROUGH*/
893 case 's':
894 if (flags & LONGINT) {
895 if ((cp = GETARG(wchar_t *)) == NULL)
896 cp = L"(null)";
897 } else {
898 char *mbp;
899
900 if (convbuf != NULL)
901 free(convbuf);
902 if ((mbp = GETARG(char *)) == NULL)
903 cp = L"(null)";
904 else {
905 convbuf = __mbsconv(mbp, prec);
906 if (convbuf == NULL) {
907 fp->_flags |= __SERR;
908 goto error;
909 }
910 cp = convbuf;
911 }
912 }
913 size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
914 sign = '\0';
915 break;
916 case 'U':
917 flags |= LONGINT;
918 /*FALLTHROUGH*/
919 case 'u':
920 if (flags & INTMAX_SIZE)
921 ujval = UJARG();
922 else
923 ulval = UARG();
924 base = 10;
925 goto nosign;
926 case 'X':
927 xdigs = xdigs_upper;
928 goto hex;
929 case 'x':
930 xdigs = xdigs_lower;
931 hex:
932 if (flags & INTMAX_SIZE)
933 ujval = UJARG();
934 else
935 ulval = UARG();
936 base = 16;
937 /* leading 0x/X only if non-zero */
938 if (flags & ALT &&
939 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
940 ox[1] = ch;
941
942 flags &= ~GROUPING;
943 /* unsigned conversions */
944 nosign: sign = '\0';
945 /*-
946 * ``... diouXx conversions ... if a precision is
947 * specified, the 0 flag will be ignored.''
948 * -- ANSI X3J11
949 */
950 number: if ((dprec = prec) >= 0)
951 flags &= ~ZEROPAD;
952
953 /*-
954 * ``The result of converting a zero value with an
955 * explicit precision of zero is no characters.''
956 * -- ANSI X3J11
957 *
958 * ``The C Standard is clear enough as is. The call
959 * printf("%#.0o", 0) should print 0.''
960 * -- Defect Report #151
961 */
962 cp = buf + BUF;
963 if (flags & INTMAX_SIZE) {
964 if (ujval != 0 || prec != 0 ||
965 (flags & ALT && base == 8))
966 cp = __ujtoa(ujval, cp, base,
967 flags & ALT, xdigs);
968 } else {
969 if (ulval != 0 || prec != 0 ||
970 (flags & ALT && base == 8))
971 cp = __ultoa(ulval, cp, base,
972 flags & ALT, xdigs);
973 }
974 size = buf + BUF - cp;
975 if (size > BUF) /* should never happen */
976 abort();
977 if ((flags & GROUPING) && size != 0)
978 size += grouping_init(&gs, size, locale);
979 break;
980 default: /* "%?" prints ?, unless ? is NUL */
981 if (ch == '\0')
982 goto done;
983 /* pretend it was %c with argument ch */
984 cp = buf;
985 *cp = ch;
986 size = 1;
987 sign = '\0';
988 break;
989 }
990
991 /*
992 * All reasonable formats wind up here. At this point, `cp'
993 * points to a string which (if not flags&LADJUST) should be
994 * padded out to `width' places. If flags&ZEROPAD, it should
995 * first be prefixed by any sign or other prefix; otherwise,
996 * it should be blank padded before the prefix is emitted.
997 * After any left-hand padding and prefixing, emit zeroes
998 * required by a decimal [diouxX] precision, then print the
999 * string proper, then emit zeroes required by any leftover
1000 * floating precision; finally, if LADJUST, pad with blanks.
1001 *
1002 * Compute actual size, so we know how much to pad.
1003 * size excludes decimal prec; realsz includes it.
1004 */
1005 realsz = dprec > size ? dprec : size;
1006 if (sign)
1007 realsz++;
1008 if (ox[1])
1009 realsz += 2;
1010
1011 prsize = width > realsz ? width : realsz;
1012 if ((unsigned)ret + prsize > INT_MAX) {
1013 ret = EOF;
1014 errno = EOVERFLOW;
1015 goto error;
1016 }
1017
1018 /* right-adjusting blank padding */
1019 if ((flags & (LADJUST|ZEROPAD)) == 0)
1020 PAD(width - realsz, blanks);
1021
1022 /* prefix */
1023 if (sign)
1024 PRINT(&sign, 1);
1025
1026 if (ox[1]) { /* ox[1] is either x, X, or \0 */
1027 ox[0] = '0';
1028 PRINT(ox, 2);
1029 }
1030
1031 /* right-adjusting zero padding */
1032 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1033 PAD(width - realsz, zeroes);
1034
1035 /* the string or number proper */
1036 #ifndef NO_FLOATING_POINT
1037 if ((flags & FPT) == 0) {
1038 #endif
1039 /* leading zeroes from decimal precision */
1040 PAD(dprec - size, zeroes);
1041 if (gs.grouping) {
1042 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
1043 goto error;
1044 } else {
1045 PRINT(cp, size);
1046 }
1047 #ifndef NO_FLOATING_POINT
1048 } else { /* glue together f_p fragments */
1049 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1050 if (expt <= 0) {
1051 PRINT(zeroes, 1);
1052 if (prec || flags & ALT)
1053 PRINT(&decimal_point, 1);
1054 PAD(-expt, zeroes);
1055 /* already handled initial 0's */
1056 prec += expt;
1057 } else {
1058 if (gs.grouping) {
1059 n = grouping_print(&gs, &io,
1060 cp, convbuf + ndig, locale);
1061 if (n < 0)
1062 goto error;
1063 cp += n;
1064 } else {
1065 PRINTANDPAD(cp, convbuf + ndig,
1066 expt, zeroes);
1067 cp += expt;
1068 }
1069 if (prec || flags & ALT)
1070 PRINT(&decimal_point, 1);
1071 }
1072 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1073 } else { /* %[eE] or sufficiently long %[gG] */
1074 if (prec > 1 || flags & ALT) {
1075 buf[0] = *cp++;
1076 buf[1] = decimal_point;
1077 PRINT(buf, 2);
1078 PRINT(cp, ndig-1);
1079 PAD(prec - ndig, zeroes);
1080 } else /* XeYYY */
1081 PRINT(cp, 1);
1082 PRINT(expstr, expsize);
1083 }
1084 }
1085 #endif
1086 /* left-adjusting padding (always blank) */
1087 if (flags & LADJUST)
1088 PAD(width - realsz, blanks);
1089
1090 /* finally, adjust ret */
1091 ret += prsize;
1092
1093 FLUSH(); /* copy out the I/O vectors */
1094 }
1095 done:
1096 FLUSH();
1097 error:
1098 va_end(orgap);
1099 if (convbuf != NULL)
1100 free(convbuf);
1101 if (__sferror(fp))
1102 ret = EOF;
1103 else
1104 fp->_flags |= savserr;
1105 if ((argtable != NULL) && (argtable != statargtable))
1106 free (argtable);
1107 return (ret);
1108 /* NOTREACHED */
1109 }
1110