1 /*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Copyright (c) 2011 The FreeBSD Foundation
9 * All rights reserved.
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #if 0
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
41 #endif /* LIBC_SCCS and not lint */
42 #endif
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45
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(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(fp);
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
448 static const char xdigs_lower[16] = "0123456789abcdef";
449 static const char xdigs_upper[16] = "0123456789ABCDEF";
450
451 /* BEWARE, these `goto error' on error. */
452 #define PRINT(ptr, len) do { \
453 if (io_print(&io, (ptr), (len), locale)) \
454 goto error; \
455 } while (0)
456 #define PAD(howmany, with) { \
457 if (io_pad(&io, (howmany), (with), locale)) \
458 goto error; \
459 }
460 #define PRINTANDPAD(p, ep, len, with) { \
461 if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
462 goto error; \
463 }
464 #define FLUSH() { \
465 if (io_flush(&io, locale)) \
466 goto error; \
467 }
468
469 /*
470 * Get the argument indexed by nextarg. If the argument table is
471 * built, use it to get the argument. If its not, get the next
472 * argument (and arguments must be gotten sequentially).
473 */
474 #define GETARG(type) \
475 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
476 (nextarg++, va_arg(ap, type)))
477
478 /*
479 * To extend shorts properly, we need both signed and unsigned
480 * argument extraction methods.
481 */
482 #define SARG() \
483 (flags&LONGINT ? GETARG(long) : \
484 flags&SHORTINT ? (long)(short)GETARG(int) : \
485 flags&CHARINT ? (long)(signed char)GETARG(int) : \
486 (long)GETARG(int))
487 #define UARG() \
488 (flags&LONGINT ? GETARG(u_long) : \
489 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
490 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
491 (u_long)GETARG(u_int))
492 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
493 #define SJARG() \
494 (flags&INTMAXT ? GETARG(intmax_t) : \
495 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
496 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
497 (intmax_t)GETARG(long long))
498 #define UJARG() \
499 (flags&INTMAXT ? GETARG(uintmax_t) : \
500 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
501 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
502 (uintmax_t)GETARG(unsigned long long))
503
504 /*
505 * Get * arguments, including the form *nn$. Preserve the nextarg
506 * that the argument can be gotten once the type is determined.
507 */
508 #define GETASTER(val) \
509 n2 = 0; \
510 cp = fmt; \
511 while (is_digit(*cp)) { \
512 n2 = 10 * n2 + to_digit(*cp); \
513 cp++; \
514 } \
515 if (*cp == '$') { \
516 int hold = nextarg; \
517 if (argtable == NULL) { \
518 argtable = statargtable; \
519 if (__find_warguments (fmt0, orgap, &argtable)) { \
520 ret = EOF; \
521 goto error; \
522 } \
523 } \
524 nextarg = n2; \
525 val = GETARG (int); \
526 nextarg = hold; \
527 fmt = ++cp; \
528 } else { \
529 val = GETARG (int); \
530 }
531
532
533 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
534 if (prepwrite(fp) != 0) {
535 errno = EBADF;
536 return (EOF);
537 }
538
539 convbuf = NULL;
540 fmt = (wchar_t *)fmt0;
541 argtable = NULL;
542 nextarg = 1;
543 va_copy(orgap, ap);
544 io_init(&io, fp);
545 ret = 0;
546 #ifndef NO_FLOATING_POINT
547 decimal_point = get_decpt(locale);
548 #endif
549
550 /*
551 * Scan the format for conversions (`%' character).
552 */
553 for (;;) {
554 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
555 /* void */;
556 if ((n = fmt - cp) != 0) {
557 if ((unsigned)ret + n > INT_MAX) {
558 ret = EOF;
559 errno = EOVERFLOW;
560 goto error;
561 }
562 PRINT(cp, n);
563 ret += n;
564 }
565 if (ch == '\0')
566 goto done;
567 fmt++; /* skip over '%' */
568
569 flags = 0;
570 dprec = 0;
571 width = 0;
572 prec = -1;
573 gs.grouping = NULL;
574 sign = '\0';
575 ox[1] = '\0';
576
577 rflag: ch = *fmt++;
578 reswitch: switch (ch) {
579 case ' ':
580 /*-
581 * ``If the space and + flags both appear, the space
582 * flag will be ignored.''
583 * -- ANSI X3J11
584 */
585 if (!sign)
586 sign = ' ';
587 goto rflag;
588 case '#':
589 flags |= ALT;
590 goto rflag;
591 case '*':
592 /*-
593 * ``A negative field width argument is taken as a
594 * - flag followed by a positive field width.''
595 * -- ANSI X3J11
596 * They don't exclude field widths read from args.
597 */
598 GETASTER (width);
599 if (width >= 0)
600 goto rflag;
601 width = -width;
602 /* FALLTHROUGH */
603 case '-':
604 flags |= LADJUST;
605 goto rflag;
606 case '+':
607 sign = '+';
608 goto rflag;
609 case '\'':
610 flags |= GROUPING;
611 goto rflag;
612 case '.':
613 if ((ch = *fmt++) == '*') {
614 GETASTER (prec);
615 goto rflag;
616 }
617 prec = 0;
618 while (is_digit(ch)) {
619 prec = 10 * prec + to_digit(ch);
620 ch = *fmt++;
621 }
622 goto reswitch;
623 case '0':
624 /*-
625 * ``Note that 0 is taken as a flag, not as the
626 * beginning of a field width.''
627 * -- ANSI X3J11
628 */
629 flags |= ZEROPAD;
630 goto rflag;
631 case '1': case '2': case '3': case '4':
632 case '5': case '6': case '7': case '8': case '9':
633 n = 0;
634 do {
635 n = 10 * n + to_digit(ch);
636 ch = *fmt++;
637 } while (is_digit(ch));
638 if (ch == '$') {
639 nextarg = n;
640 if (argtable == NULL) {
641 argtable = statargtable;
642 if (__find_warguments (fmt0, orgap,
643 &argtable)) {
644 ret = EOF;
645 goto error;
646 }
647 }
648 goto rflag;
649 }
650 width = n;
651 goto reswitch;
652 #ifndef NO_FLOATING_POINT
653 case 'L':
654 flags |= LONGDBL;
655 goto rflag;
656 #endif
657 case 'h':
658 if (flags & SHORTINT) {
659 flags &= ~SHORTINT;
660 flags |= CHARINT;
661 } else
662 flags |= SHORTINT;
663 goto rflag;
664 case 'j':
665 flags |= INTMAXT;
666 goto rflag;
667 case 'l':
668 if (flags & LONGINT) {
669 flags &= ~LONGINT;
670 flags |= LLONGINT;
671 } else
672 flags |= LONGINT;
673 goto rflag;
674 case 'q':
675 flags |= LLONGINT; /* not necessarily */
676 goto rflag;
677 case 't':
678 flags |= PTRDIFFT;
679 goto rflag;
680 case 'z':
681 flags |= SIZET;
682 goto rflag;
683 case 'C':
684 flags |= LONGINT;
685 /*FALLTHROUGH*/
686 case 'c':
687 if (flags & LONGINT)
688 *(cp = buf) = (wchar_t)GETARG(wint_t);
689 else
690 *(cp = buf) = (wchar_t)btowc(GETARG(int));
691 size = 1;
692 sign = '\0';
693 break;
694 case 'D':
695 flags |= LONGINT;
696 /*FALLTHROUGH*/
697 case 'd':
698 case 'i':
699 if (flags & INTMAX_SIZE) {
700 ujval = SJARG();
701 if ((intmax_t)ujval < 0) {
702 ujval = -ujval;
703 sign = '-';
704 }
705 } else {
706 ulval = SARG();
707 if ((long)ulval < 0) {
708 ulval = -ulval;
709 sign = '-';
710 }
711 }
712 base = 10;
713 goto number;
714 #ifndef NO_FLOATING_POINT
715 case 'a':
716 case 'A':
717 if (ch == 'a') {
718 ox[1] = 'x';
719 xdigs = xdigs_lower;
720 expchar = 'p';
721 } else {
722 ox[1] = 'X';
723 xdigs = xdigs_upper;
724 expchar = 'P';
725 }
726 if (prec >= 0)
727 prec++;
728 if (flags & LONGDBL) {
729 fparg.ldbl = GETARG(long double);
730 dtoaresult =
731 __hldtoa(fparg.ldbl, xdigs, prec,
732 &expt, &signflag, &dtoaend);
733 } else {
734 fparg.dbl = GETARG(double);
735 dtoaresult =
736 __hdtoa(fparg.dbl, xdigs, prec,
737 &expt, &signflag, &dtoaend);
738 }
739 if (prec < 0)
740 prec = dtoaend - dtoaresult;
741 if (expt == INT_MAX)
742 ox[1] = '\0';
743 if (convbuf != NULL)
744 free(convbuf);
745 ndig = dtoaend - dtoaresult;
746 cp = convbuf = __mbsconv(dtoaresult, -1);
747 freedtoa(dtoaresult);
748 goto fp_common;
749 case 'e':
750 case 'E':
751 expchar = ch;
752 if (prec < 0) /* account for digit before decpt */
753 prec = DEFPREC + 1;
754 else
755 prec++;
756 goto fp_begin;
757 case 'f':
758 case 'F':
759 expchar = '\0';
760 goto fp_begin;
761 case 'g':
762 case 'G':
763 expchar = ch - ('g' - 'e');
764 if (prec == 0)
765 prec = 1;
766 fp_begin:
767 if (prec < 0)
768 prec = DEFPREC;
769 if (convbuf != NULL)
770 free(convbuf);
771 if (flags & LONGDBL) {
772 fparg.ldbl = GETARG(long double);
773 dtoaresult =
774 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
775 &expt, &signflag, &dtoaend);
776 } else {
777 fparg.dbl = GETARG(double);
778 dtoaresult =
779 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
780 &expt, &signflag, &dtoaend);
781 if (expt == 9999)
782 expt = INT_MAX;
783 }
784 ndig = dtoaend - dtoaresult;
785 cp = convbuf = __mbsconv(dtoaresult, -1);
786 freedtoa(dtoaresult);
787 fp_common:
788 if (signflag)
789 sign = '-';
790 if (expt == INT_MAX) { /* inf or nan */
791 if (*cp == 'N') {
792 cp = (ch >= 'a') ? L"nan" : L"NAN";
793 sign = '\0';
794 } else
795 cp = (ch >= 'a') ? L"inf" : L"INF";
796 size = 3;
797 flags &= ~ZEROPAD;
798 break;
799 }
800 flags |= FPT;
801 if (ch == 'g' || ch == 'G') {
802 if (expt > -4 && expt <= prec) {
803 /* Make %[gG] smell like %[fF] */
804 expchar = '\0';
805 if (flags & ALT)
806 prec -= expt;
807 else
808 prec = ndig - expt;
809 if (prec < 0)
810 prec = 0;
811 } else {
812 /*
813 * Make %[gG] smell like %[eE], but
814 * trim trailing zeroes if no # flag.
815 */
816 if (!(flags & ALT))
817 prec = ndig;
818 }
819 }
820 if (expchar) {
821 expsize = exponent(expstr, expt - 1, expchar);
822 size = expsize + prec;
823 if (prec > 1 || flags & ALT)
824 ++size;
825 } else {
826 /* space for digits before decimal point */
827 if (expt > 0)
828 size = expt;
829 else /* "0" */
830 size = 1;
831 /* space for decimal pt and following digits */
832 if (prec || flags & ALT)
833 size += prec + 1;
834 if ((flags & GROUPING) && expt > 0)
835 size += grouping_init(&gs, expt, locale);
836 }
837 break;
838 #endif /* !NO_FLOATING_POINT */
839 case 'n':
840 /*
841 * Assignment-like behavior is specified if the
842 * value overflows or is otherwise unrepresentable.
843 * C99 says to use `signed char' for %hhn conversions.
844 */
845 if (flags & LLONGINT)
846 *GETARG(long long *) = ret;
847 else if (flags & SIZET)
848 *GETARG(ssize_t *) = (ssize_t)ret;
849 else if (flags & PTRDIFFT)
850 *GETARG(ptrdiff_t *) = ret;
851 else if (flags & INTMAXT)
852 *GETARG(intmax_t *) = ret;
853 else if (flags & LONGINT)
854 *GETARG(long *) = ret;
855 else if (flags & SHORTINT)
856 *GETARG(short *) = ret;
857 else if (flags & CHARINT)
858 *GETARG(signed char *) = ret;
859 else
860 *GETARG(int *) = ret;
861 continue; /* no output */
862 case 'O':
863 flags |= LONGINT;
864 /*FALLTHROUGH*/
865 case 'o':
866 if (flags & INTMAX_SIZE)
867 ujval = UJARG();
868 else
869 ulval = UARG();
870 base = 8;
871 goto nosign;
872 case 'p':
873 /*-
874 * ``The argument shall be a pointer to void. The
875 * value of the pointer is converted to a sequence
876 * of printable characters, in an implementation-
877 * defined manner.''
878 * -- ANSI X3J11
879 */
880 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
881 base = 16;
882 xdigs = xdigs_lower;
883 flags = flags | INTMAXT;
884 ox[1] = 'x';
885 goto nosign;
886 case 'S':
887 flags |= LONGINT;
888 /*FALLTHROUGH*/
889 case 's':
890 if (flags & LONGINT) {
891 if ((cp = GETARG(wchar_t *)) == NULL)
892 cp = L"(null)";
893 } else {
894 char *mbp;
895
896 if (convbuf != NULL)
897 free(convbuf);
898 if ((mbp = GETARG(char *)) == NULL)
899 cp = L"(null)";
900 else {
901 convbuf = __mbsconv(mbp, prec);
902 if (convbuf == NULL) {
903 fp->_flags |= __SERR;
904 goto error;
905 }
906 cp = convbuf;
907 }
908 }
909 size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
910 sign = '\0';
911 break;
912 case 'U':
913 flags |= LONGINT;
914 /*FALLTHROUGH*/
915 case 'u':
916 if (flags & INTMAX_SIZE)
917 ujval = UJARG();
918 else
919 ulval = UARG();
920 base = 10;
921 goto nosign;
922 case 'X':
923 xdigs = xdigs_upper;
924 goto hex;
925 case 'x':
926 xdigs = xdigs_lower;
927 hex:
928 if (flags & INTMAX_SIZE)
929 ujval = UJARG();
930 else
931 ulval = UARG();
932 base = 16;
933 /* leading 0x/X only if non-zero */
934 if (flags & ALT &&
935 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
936 ox[1] = ch;
937
938 flags &= ~GROUPING;
939 /* unsigned conversions */
940 nosign: sign = '\0';
941 /*-
942 * ``... diouXx conversions ... if a precision is
943 * specified, the 0 flag will be ignored.''
944 * -- ANSI X3J11
945 */
946 number: if ((dprec = prec) >= 0)
947 flags &= ~ZEROPAD;
948
949 /*-
950 * ``The result of converting a zero value with an
951 * explicit precision of zero is no characters.''
952 * -- ANSI X3J11
953 *
954 * ``The C Standard is clear enough as is. The call
955 * printf("%#.0o", 0) should print 0.''
956 * -- Defect Report #151
957 */
958 cp = buf + BUF;
959 if (flags & INTMAX_SIZE) {
960 if (ujval != 0 || prec != 0 ||
961 (flags & ALT && base == 8))
962 cp = __ujtoa(ujval, cp, base,
963 flags & ALT, xdigs);
964 } else {
965 if (ulval != 0 || prec != 0 ||
966 (flags & ALT && base == 8))
967 cp = __ultoa(ulval, cp, base,
968 flags & ALT, xdigs);
969 }
970 size = buf + BUF - cp;
971 if (size > BUF) /* should never happen */
972 abort();
973 if ((flags & GROUPING) && size != 0)
974 size += grouping_init(&gs, size, locale);
975 break;
976 default: /* "%?" prints ?, unless ? is NUL */
977 if (ch == '\0')
978 goto done;
979 /* pretend it was %c with argument ch */
980 cp = buf;
981 *cp = ch;
982 size = 1;
983 sign = '\0';
984 break;
985 }
986
987 /*
988 * All reasonable formats wind up here. At this point, `cp'
989 * points to a string which (if not flags&LADJUST) should be
990 * padded out to `width' places. If flags&ZEROPAD, it should
991 * first be prefixed by any sign or other prefix; otherwise,
992 * it should be blank padded before the prefix is emitted.
993 * After any left-hand padding and prefixing, emit zeroes
994 * required by a decimal [diouxX] precision, then print the
995 * string proper, then emit zeroes required by any leftover
996 * floating precision; finally, if LADJUST, pad with blanks.
997 *
998 * Compute actual size, so we know how much to pad.
999 * size excludes decimal prec; realsz includes it.
1000 */
1001 realsz = dprec > size ? dprec : size;
1002 if (sign)
1003 realsz++;
1004 if (ox[1])
1005 realsz += 2;
1006
1007 prsize = width > realsz ? width : realsz;
1008 if ((unsigned)ret + prsize > INT_MAX) {
1009 ret = EOF;
1010 errno = EOVERFLOW;
1011 goto error;
1012 }
1013
1014 /* right-adjusting blank padding */
1015 if ((flags & (LADJUST|ZEROPAD)) == 0)
1016 PAD(width - realsz, blanks);
1017
1018 /* prefix */
1019 if (sign)
1020 PRINT(&sign, 1);
1021
1022 if (ox[1]) { /* ox[1] is either x, X, or \0 */
1023 ox[0] = '0';
1024 PRINT(ox, 2);
1025 }
1026
1027 /* right-adjusting zero padding */
1028 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1029 PAD(width - realsz, zeroes);
1030
1031 /* the string or number proper */
1032 #ifndef NO_FLOATING_POINT
1033 if ((flags & FPT) == 0) {
1034 #endif
1035 /* leading zeroes from decimal precision */
1036 PAD(dprec - size, zeroes);
1037 if (gs.grouping) {
1038 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
1039 goto error;
1040 } else {
1041 PRINT(cp, size);
1042 }
1043 #ifndef NO_FLOATING_POINT
1044 } else { /* glue together f_p fragments */
1045 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1046 if (expt <= 0) {
1047 PRINT(zeroes, 1);
1048 if (prec || flags & ALT)
1049 PRINT(&decimal_point, 1);
1050 PAD(-expt, zeroes);
1051 /* already handled initial 0's */
1052 prec += expt;
1053 } else {
1054 if (gs.grouping) {
1055 n = grouping_print(&gs, &io,
1056 cp, convbuf + ndig, locale);
1057 if (n < 0)
1058 goto error;
1059 cp += n;
1060 } else {
1061 PRINTANDPAD(cp, convbuf + ndig,
1062 expt, zeroes);
1063 cp += expt;
1064 }
1065 if (prec || flags & ALT)
1066 PRINT(&decimal_point, 1);
1067 }
1068 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1069 } else { /* %[eE] or sufficiently long %[gG] */
1070 if (prec > 1 || flags & ALT) {
1071 buf[0] = *cp++;
1072 buf[1] = decimal_point;
1073 PRINT(buf, 2);
1074 PRINT(cp, ndig-1);
1075 PAD(prec - ndig, zeroes);
1076 } else /* XeYYY */
1077 PRINT(cp, 1);
1078 PRINT(expstr, expsize);
1079 }
1080 }
1081 #endif
1082 /* left-adjusting padding (always blank) */
1083 if (flags & LADJUST)
1084 PAD(width - realsz, blanks);
1085
1086 /* finally, adjust ret */
1087 ret += prsize;
1088
1089 FLUSH(); /* copy out the I/O vectors */
1090 }
1091 done:
1092 FLUSH();
1093 error:
1094 va_end(orgap);
1095 if (convbuf != NULL)
1096 free(convbuf);
1097 if (__sferror(fp))
1098 ret = EOF;
1099 if ((argtable != NULL) && (argtable != statargtable))
1100 free (argtable);
1101 return (ret);
1102 /* NOTREACHED */
1103 }
1104