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 * @(#)vfprintf.c 8.1 (Berkeley) 6/4/93
38 * $FreeBSD: head/lib/libc/stdio/vfwprintf.c 249808 2013-04-23 13:33:13Z emaste $
39 */
40
41 /*
42 * Actual wprintf innards.
43 *
44 * Avoid making gratuitous changes to this source file; it should be kept
45 * as close as possible to vfprintf.c for ease of maintenance.
46 */
47
48 #include "namespace.h"
49 #include <sys/types.h>
50
51 #include <ctype.h>
52 #include <errno.h>
53 #include <limits.h>
54 #include <locale.h>
55 #include <stdarg.h>
56 #include <stddef.h>
57 #include <stdint.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <wchar.h>
62 #include <wctype.h>
63 #include "un-namespace.h"
64
65 #include "libc_private.h"
66 #include "local.h"
67 #include "printflocal.h"
68 #include "xlocale_private.h"
69
70 static int __sprint(FILE *, struct __suio *, locale_t);
71 static int __sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline;
72 static wint_t __xfputwc(wchar_t, FILE *, locale_t);
73 static wchar_t *__mbsconv(char *, int);
74
75 #define CHAR wchar_t
76 #include "printfcommon.h"
77
78 struct grouping_state {
79 wchar_t thousands_sep; /* locale-specific thousands separator */
80 const char *grouping; /* locale-specific numeric grouping rules */
81 int lead; /* sig figs before decimal or group sep */
82 int nseps; /* number of group separators with ' */
83 int nrepeats; /* number of repeats of the last group */
84 };
85
86 static const mbstate_t initial_mbs;
87
88 static inline wchar_t
get_decpt(locale_t locale)89 get_decpt(locale_t locale)
90 {
91 mbstate_t mbs;
92 wchar_t decpt;
93 int nconv;
94
95 mbs = initial_mbs;
96 nconv = mbrtowc(&decpt, localeconv_l(locale)->decimal_point, MB_CUR_MAX, &mbs);
97 if (nconv == (size_t)-1 || nconv == (size_t)-2)
98 decpt = '.'; /* failsafe */
99 return (decpt);
100 }
101
102 static inline wchar_t
get_thousep(locale_t locale)103 get_thousep(locale_t locale)
104 {
105 mbstate_t mbs;
106 wchar_t thousep;
107 int nconv;
108
109 mbs = initial_mbs;
110 nconv = mbrtowc(&thousep, localeconv_l(locale)->thousands_sep,
111 MB_CUR_MAX, &mbs);
112 if (nconv == (size_t)-1 || nconv == (size_t)-2)
113 thousep = '\0'; /* failsafe */
114 return (thousep);
115 }
116
117 /*
118 * Initialize the thousands' grouping state in preparation to print a
119 * number with ndigits digits. This routine returns the total number
120 * of wide characters that will be printed.
121 */
122 static int
grouping_init(struct grouping_state * gs,int ndigits,locale_t locale)123 grouping_init(struct grouping_state *gs, int ndigits, locale_t locale)
124 {
125
126 gs->grouping = localeconv_l(locale)->grouping;
127 gs->thousands_sep = get_thousep(locale);
128
129 gs->nseps = gs->nrepeats = 0;
130 gs->lead = ndigits;
131 while (*gs->grouping != CHAR_MAX) {
132 if (gs->lead <= *gs->grouping)
133 break;
134 gs->lead -= *gs->grouping;
135 if (*(gs->grouping+1)) {
136 gs->nseps++;
137 gs->grouping++;
138 } else
139 gs->nrepeats++;
140 }
141 return (gs->nseps + gs->nrepeats);
142 }
143
144 /*
145 * Print a number with thousands' separators.
146 */
147 static int
grouping_print(struct grouping_state * gs,struct io_state * iop,const CHAR * cp,const CHAR * ep,locale_t locale)148 grouping_print(struct grouping_state *gs, struct io_state *iop,
149 const CHAR *cp, const CHAR *ep, locale_t locale)
150 {
151 const CHAR *cp0 = cp;
152
153 if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
154 return (-1);
155 cp += gs->lead;
156 while (gs->nseps > 0 || gs->nrepeats > 0) {
157 if (gs->nrepeats > 0)
158 gs->nrepeats--;
159 else {
160 gs->grouping--;
161 gs->nseps--;
162 }
163 if (io_print(iop, &gs->thousands_sep, 1, locale))
164 return (-1);
165 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
166 return (-1);
167 cp += *gs->grouping;
168 }
169 if (cp > ep)
170 cp = ep;
171 return (cp - cp0);
172 }
173
174
175 /*
176 * Flush out all the vectors defined by the given uio,
177 * then reset it so that it can be reused.
178 *
179 * XXX The fact that we do this a character at a time and convert to a
180 * multibyte character sequence even if the destination is a wide
181 * string eclipses the benefits of buffering.
182 */
183 static int
__sprint(FILE * fp,struct __suio * uio,locale_t locale)184 __sprint(FILE *fp, struct __suio *uio, locale_t locale)
185 {
186 struct __siov *iov;
187 wchar_t *p;
188 int i, len;
189
190 iov = uio->uio_iov;
191 for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) {
192 p = (wchar_t *)iov->iov_base;
193 len = iov->iov_len;
194 for (i = 0; i < len; i++) {
195 if (__xfputwc(p[i], fp, locale) == WEOF)
196 return (-1);
197 }
198 }
199 uio->uio_iovcnt = 0;
200 return (0);
201 }
202
203 /*
204 * Helper function for `fprintf to unbuffered unix file': creates a
205 * temporary buffer. We only work on write-only files; this avoids
206 * worries about ungetc buffers and so forth.
207 */
208 static int
__sbprintf(FILE * fp,locale_t locale,const wchar_t * fmt,va_list ap)209 __sbprintf(FILE *fp, locale_t locale, const wchar_t *fmt, va_list ap)
210 {
211 int ret;
212 FILE fake;
213 unsigned char buf[BUFSIZ];
214
215 /* XXX This is probably not needed. */
216 if (prepwrite(fp) != 0)
217 return (EOF);
218
219 /* copy the important variables */
220 fake.pub._flags = fp->pub._flags & ~__SNBF;
221 fake.pub._fileno = fp->pub._fileno;
222 fake._cookie = fp->_cookie;
223 fake._write = fp->_write;
224
225 /* set up the buffer */
226 fake._bf._base = fake.pub._p = buf;
227 fake._bf._size = fake.pub._w = sizeof(buf);
228 fake.pub._lbfsize = 0; /* not actually used, but Just In Case */
229
230 /* do the work, then copy any error status */
231 ret = __vfwprintf(&fake, locale, fmt, ap);
232 if (ret >= 0 && __fflush(&fake))
233 ret = WEOF;
234 if (fake.pub._flags & __SERR)
235 fp->pub._flags |= __SERR;
236 return (ret);
237 }
238
239 /*
240 * Like __fputwc, but handles fake string (__SSTR) files properly.
241 * File must already be locked.
242 */
243 static wint_t
__xfputwc(wchar_t wc,FILE * fp,locale_t locale)244 __xfputwc(wchar_t wc, FILE *fp, locale_t locale)
245 {
246 mbstate_t mbs;
247 char buf[MB_LEN_MAX];
248 struct __suio uio;
249 struct __siov iov;
250 size_t len;
251
252 if ((fp->pub._flags & __SSTR) == 0)
253 return (__fputwc(wc, fp, locale));
254
255 mbs = initial_mbs;
256 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) {
257 fp->pub._flags |= __SERR;
258 return (WEOF);
259 }
260 uio.uio_iov = &iov;
261 uio.uio_resid = len;
262 uio.uio_iovcnt = 1;
263 iov.iov_base = buf;
264 iov.iov_len = len;
265 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
266 }
267
268 /*
269 * Convert a multibyte character string argument for the %s format to a wide
270 * string representation. ``prec'' specifies the maximum number of bytes
271 * to output. If ``prec'' is greater than or equal to zero, we can't assume
272 * that the multibyte char. string ends in a null character.
273 */
274 static wchar_t *
__mbsconv(char * mbsarg,int prec)275 __mbsconv(char *mbsarg, int prec)
276 {
277 mbstate_t mbs;
278 wchar_t *convbuf, *wcp;
279 const char *p;
280 size_t insize, nchars, nconv;
281
282 if (mbsarg == NULL)
283 return (NULL);
284
285 /*
286 * Supplied argument is a multibyte string; convert it to wide
287 * characters first.
288 */
289 if (prec >= 0) {
290 /*
291 * String is not guaranteed to be NUL-terminated. Find the
292 * number of characters to print.
293 */
294 p = mbsarg;
295 insize = nchars = nconv = 0;
296 mbs = initial_mbs;
297 while (nchars != (size_t)prec) {
298 nconv = mbrlen(p, MB_CUR_MAX, &mbs);
299 if (nconv == 0 || nconv == (size_t)-1 ||
300 nconv == (size_t)-2)
301 break;
302 p += nconv;
303 nchars++;
304 insize += nconv;
305 }
306 if (nconv == (size_t)-1 || nconv == (size_t)-2)
307 return (NULL);
308 } else {
309 insize = strlen(mbsarg);
310 nconv = 0;
311 }
312
313 /*
314 * Allocate buffer for the result and perform the conversion,
315 * converting at most `size' bytes of the input multibyte string to
316 * wide characters for printing.
317 */
318 convbuf = malloc((insize + 1) * sizeof(*convbuf));
319 if (convbuf == NULL)
320 return (NULL);
321 wcp = convbuf;
322 p = mbsarg;
323 mbs = initial_mbs;
324 while (insize != 0) {
325 nconv = mbrtowc(wcp, p, insize, &mbs);
326 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
327 break;
328 wcp++;
329 p += nconv;
330 insize -= nconv;
331 }
332 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
333 free(convbuf);
334 return (NULL);
335 }
336 *wcp = L'\0';
337
338 return (convbuf);
339 }
340
341 /*
342 * MT-safe version
343 */
344 int
vfwprintf_l(FILE * __restrict fp,locale_t locale,const wchar_t * __restrict fmt0,va_list ap)345 vfwprintf_l(FILE * __restrict fp, locale_t locale,
346 const wchar_t * __restrict fmt0, va_list ap)
347
348 {
349 int ret;
350 FIX_LOCALE(locale);
351 FLOCKFILE(fp);
352 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
353 if ((fp->pub._flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
354 fp->pub._fileno >= 0)
355 ret = __sbprintf(fp, locale, fmt0, ap);
356 else
357 ret = __vfwprintf(fp, locale, fmt0, ap);
358 FUNLOCKFILE(fp);
359 return (ret);
360 }
361 int
vfwprintf(FILE * __restrict fp,const wchar_t * __restrict fmt0,va_list ap)362 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
363 {
364 return vfwprintf_l(fp, __get_locale(), fmt0, ap);
365 }
366
367 /*
368 * The size of the buffer we use as scratch space for integer
369 * conversions, among other things. We need enough space to
370 * write a uintmax_t in octal (plus one byte).
371 */
372 #if UINTMAX_MAX <= UINT64_MAX
373 #define BUF 32
374 #else
375 #error "BUF must be large enough to format a uintmax_t"
376 #endif
377
378 /*
379 * Non-MT-safe version
380 */
381 int
__vfwprintf(FILE * fp,locale_t locale,const wchar_t * fmt0,va_list ap)382 __vfwprintf(FILE *fp, locale_t locale, const wchar_t *fmt0, va_list ap)
383 {
384 wchar_t *fmt; /* format string */
385 wchar_t ch; /* character from fmt */
386 int n, n2; /* handy integer (short term usage) */
387 wchar_t *cp; /* handy char pointer (short term usage) */
388 int flags; /* flags as above */
389 int ret; /* return value accumulator */
390 int width; /* width from format (%8d), or 0 */
391 int prec; /* precision from format; <0 for N/A */
392 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
393 struct grouping_state gs; /* thousands' grouping info */
394 #ifndef NO_FLOATING_POINT
395 /*
396 * We can decompose the printed representation of floating
397 * point numbers into several parts, some of which may be empty:
398 *
399 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
400 * A B ---C--- D E F
401 *
402 * A: 'sign' holds this value if present; '\0' otherwise
403 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
404 * C: cp points to the string MMMNNN. Leading and trailing
405 * zeros are not in the string and must be added.
406 * D: expchar holds this character; '\0' if no exponent, e.g. %f
407 * F: at least two digits for decimal, at least one digit for hex
408 */
409 wchar_t decimal_point; /* locale specific decimal point */
410 int signflag; /* true if float is negative */
411 union { /* floating point arguments %[aAeEfFgG] */
412 double dbl;
413 long double ldbl;
414 } fparg;
415 int expt; /* integer value of exponent */
416 char expchar; /* exponent character: [eEpP\0] */
417 char *dtoaend; /* pointer to end of converted digits */
418 int expsize; /* character count for expstr */
419 int ndig; /* actual number of digits returned by dtoa */
420 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
421 char *dtoaresult; /* buffer allocated by dtoa */
422 #endif
423 u_long ulval; /* integer arguments %[diouxX] */
424 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
425 int base; /* base for [diouxX] conversion */
426 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
427 int realsz; /* field size expanded by dprec, sign, etc */
428 int size; /* size of converted field or string */
429 int prsize; /* max size of printed field */
430 const char *xdigs; /* digits for [xX] conversion */
431 struct io_state io; /* I/O buffering state */
432 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
433 wchar_t ox[2]; /* space for 0x hex-prefix */
434 union arg *argtable; /* args, built due to positional arg */
435 union arg statargtable [STATIC_ARG_TBL_SIZE];
436 int nextarg; /* 1-based argument index */
437 va_list orgap; /* original argument pointer */
438 wchar_t *convbuf; /* multibyte to wide conversion result */
439
440 static const char xdigs_lower[16] = "0123456789abcdef";
441 static const char xdigs_upper[16] = "0123456789ABCDEF";
442
443 /* BEWARE, these `goto error' on error. */
444 #define PRINT(ptr, len) do { \
445 if (io_print(&io, (ptr), (len), locale)) \
446 goto error; \
447 } while (0)
448 #define PAD(howmany, with) { \
449 if (io_pad(&io, (howmany), (with), locale)) \
450 goto error; \
451 }
452 #define PRINTANDPAD(p, ep, len, with) { \
453 if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
454 goto error; \
455 }
456 #define FLUSH() { \
457 if (io_flush(&io, locale)) \
458 goto error; \
459 }
460
461 /*
462 * Get the argument indexed by nextarg. If the argument table is
463 * built, use it to get the argument. If its not, get the next
464 * argument (and arguments must be gotten sequentially).
465 */
466 #define GETARG(type) \
467 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
468 (nextarg++, va_arg(ap, type)))
469
470 /*
471 * To extend shorts properly, we need both signed and unsigned
472 * argument extraction methods.
473 */
474 #define SARG() \
475 (flags&LONGINT ? GETARG(long) : \
476 flags&SHORTINT ? (long)(short)GETARG(int) : \
477 flags&CHARINT ? (long)(signed char)GETARG(int) : \
478 (long)GETARG(int))
479 #define UARG() \
480 (flags&LONGINT ? GETARG(u_long) : \
481 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
482 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
483 (u_long)GETARG(u_int))
484 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
485 #define SJARG() \
486 (flags&INTMAXT ? GETARG(intmax_t) : \
487 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
488 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
489 (intmax_t)GETARG(long long))
490 #define UJARG() \
491 (flags&INTMAXT ? GETARG(uintmax_t) : \
492 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
493 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
494 (uintmax_t)GETARG(unsigned long long))
495
496 /*
497 * Get * arguments, including the form *nn$. Preserve the nextarg
498 * that the argument can be gotten once the type is determined.
499 */
500 #define GETASTER(val) \
501 n2 = 0; \
502 cp = fmt; \
503 while (is_digit(*cp)) { \
504 n2 = 10 * n2 + to_digit(*cp); \
505 cp++; \
506 } \
507 if (*cp == '$') { \
508 int hold = nextarg; \
509 if (argtable == NULL) { \
510 argtable = statargtable; \
511 if (__find_warguments (fmt0, orgap, &argtable)) { \
512 ret = EOF; \
513 goto error; \
514 } \
515 } \
516 nextarg = n2; \
517 val = GETARG (int); \
518 nextarg = hold; \
519 fmt = ++cp; \
520 } else { \
521 val = GETARG (int); \
522 }
523
524
525 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
526 if (prepwrite(fp) != 0)
527 return (EOF);
528
529 convbuf = NULL;
530 fmt = (wchar_t *)fmt0;
531 argtable = NULL;
532 nextarg = 1;
533 va_copy(orgap, ap);
534 io_init(&io, fp);
535 ret = 0;
536 #ifndef NO_FLOATING_POINT
537 decimal_point = get_decpt(locale);
538 #endif
539
540 /*
541 * Scan the format for conversions (`%' character).
542 */
543 for (;;) {
544 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
545 /* void */;
546 if ((n = fmt - cp) != 0) {
547 if ((unsigned)ret + n > INT_MAX) {
548 ret = EOF;
549 errno = EOVERFLOW;
550 goto error;
551 }
552 PRINT(cp, n);
553 ret += n;
554 }
555 if (ch == '\0')
556 goto done;
557 fmt++; /* skip over '%' */
558
559 flags = 0;
560 dprec = 0;
561 width = 0;
562 prec = -1;
563 gs.grouping = NULL;
564 sign = '\0';
565 ox[1] = '\0';
566
567 rflag: ch = *fmt++;
568 reswitch: switch (ch) {
569 case ' ':
570 /*-
571 * ``If the space and + flags both appear, the space
572 * flag will be ignored.''
573 * -- ANSI X3J11
574 */
575 if (!sign)
576 sign = ' ';
577 goto rflag;
578 case '#':
579 flags |= ALT;
580 goto rflag;
581 case '*':
582 /*-
583 * ``A negative field width argument is taken as a
584 * - flag followed by a positive field width.''
585 * -- ANSI X3J11
586 * They don't exclude field widths read from args.
587 */
588 GETASTER (width);
589 if (width >= 0)
590 goto rflag;
591 width = -width;
592 /* FALLTHROUGH */
593 case '-':
594 flags |= LADJUST;
595 goto rflag;
596 case '+':
597 sign = '+';
598 goto rflag;
599 case '\'':
600 flags |= GROUPING;
601 goto rflag;
602 case '.':
603 if ((ch = *fmt++) == '*') {
604 GETASTER (prec);
605 goto rflag;
606 }
607 prec = 0;
608 while (is_digit(ch)) {
609 prec = 10 * prec + to_digit(ch);
610 ch = *fmt++;
611 }
612 goto reswitch;
613 case '0':
614 /*-
615 * ``Note that 0 is taken as a flag, not as the
616 * beginning of a field width.''
617 * -- ANSI X3J11
618 */
619 flags |= ZEROPAD;
620 goto rflag;
621 case '1': case '2': case '3': case '4':
622 case '5': case '6': case '7': case '8': case '9':
623 n = 0;
624 do {
625 n = 10 * n + to_digit(ch);
626 ch = *fmt++;
627 } while (is_digit(ch));
628 if (ch == '$') {
629 nextarg = n;
630 if (argtable == NULL) {
631 argtable = statargtable;
632 if (__find_warguments (fmt0, orgap,
633 &argtable)) {
634 ret = EOF;
635 goto error;
636 }
637 }
638 goto rflag;
639 }
640 width = n;
641 goto reswitch;
642 #ifndef NO_FLOATING_POINT
643 case 'L':
644 flags |= LONGDBL;
645 goto rflag;
646 #endif
647 case 'h':
648 if (flags & SHORTINT) {
649 flags &= ~SHORTINT;
650 flags |= CHARINT;
651 } else
652 flags |= SHORTINT;
653 goto rflag;
654 case 'j':
655 flags |= INTMAXT;
656 goto rflag;
657 case 'l':
658 if (flags & LONGINT) {
659 flags &= ~LONGINT;
660 flags |= LLONGINT;
661 } else
662 flags |= LONGINT;
663 goto rflag;
664 case 'q':
665 flags |= LLONGINT; /* not necessarily */
666 goto rflag;
667 case 't':
668 flags |= PTRDIFFT;
669 goto rflag;
670 case 'z':
671 flags |= SIZET;
672 goto rflag;
673 case 'C':
674 flags |= LONGINT;
675 /*FALLTHROUGH*/
676 case 'c':
677 if (flags & LONGINT)
678 *(cp = buf) = (wchar_t)GETARG(wint_t);
679 else
680 *(cp = buf) = (wchar_t)btowc(GETARG(int));
681 size = 1;
682 sign = '\0';
683 break;
684 case 'D':
685 flags |= LONGINT;
686 /*FALLTHROUGH*/
687 case 'd':
688 case 'i':
689 if (flags & INTMAX_SIZE) {
690 ujval = SJARG();
691 if ((intmax_t)ujval < 0) {
692 ujval = -ujval;
693 sign = '-';
694 }
695 } else {
696 ulval = SARG();
697 if ((long)ulval < 0) {
698 ulval = -ulval;
699 sign = '-';
700 }
701 }
702 base = 10;
703 goto number;
704 #ifndef NO_FLOATING_POINT
705 case 'a':
706 case 'A':
707 if (ch == 'a') {
708 ox[1] = 'x';
709 xdigs = xdigs_lower;
710 expchar = 'p';
711 } else {
712 ox[1] = 'X';
713 xdigs = xdigs_upper;
714 expchar = 'P';
715 }
716 if (prec >= 0)
717 prec++;
718 if (flags & LONGDBL) {
719 fparg.ldbl = GETARG(long double);
720 dtoaresult =
721 __hldtoa(fparg.ldbl, xdigs, prec,
722 &expt, &signflag, &dtoaend);
723 } else {
724 fparg.dbl = GETARG(double);
725 dtoaresult =
726 __hdtoa(fparg.dbl, xdigs, prec,
727 &expt, &signflag, &dtoaend);
728 }
729 if (prec < 0)
730 prec = dtoaend - dtoaresult;
731 if (expt == INT_MAX)
732 ox[1] = '\0';
733 if (convbuf != NULL)
734 free(convbuf);
735 ndig = dtoaend - dtoaresult;
736 cp = convbuf = __mbsconv(dtoaresult, -1);
737 freedtoa(dtoaresult);
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 (convbuf != NULL)
760 free(convbuf);
761 if (flags & LONGDBL) {
762 fparg.ldbl = GETARG(long double);
763 dtoaresult =
764 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
765 &expt, &signflag, &dtoaend);
766 } else {
767 fparg.dbl = GETARG(double);
768 dtoaresult =
769 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
770 &expt, &signflag, &dtoaend);
771 if (expt == 9999)
772 expt = INT_MAX;
773 }
774 ndig = dtoaend - dtoaresult;
775 cp = convbuf = __mbsconv(dtoaresult, -1);
776 freedtoa(dtoaresult);
777 fp_common:
778 if (signflag)
779 sign = '-';
780 if (expt == INT_MAX) { /* inf or nan */
781 if (*cp == 'N') {
782 cp = (ch >= 'a') ? L"nan" : L"NAN";
783 sign = '\0';
784 } else
785 cp = (ch >= 'a') ? L"inf" : L"INF";
786 size = 3;
787 flags &= ~ZEROPAD;
788 break;
789 }
790 flags |= FPT;
791 if (ch == 'g' || ch == 'G') {
792 if (expt > -4 && expt <= prec) {
793 /* Make %[gG] smell like %[fF] */
794 expchar = '\0';
795 if (flags & ALT)
796 prec -= expt;
797 else
798 prec = ndig - expt;
799 if (prec < 0)
800 prec = 0;
801 } else {
802 /*
803 * Make %[gG] smell like %[eE], but
804 * trim trailing zeroes if no # flag.
805 */
806 if (!(flags & ALT))
807 prec = ndig;
808 }
809 }
810 if (expchar) {
811 expsize = exponent(expstr, expt - 1, expchar);
812 size = expsize + prec;
813 if (prec > 1 || flags & ALT)
814 ++size;
815 } else {
816 /* space for digits before decimal point */
817 if (expt > 0)
818 size = expt;
819 else /* "0" */
820 size = 1;
821 /* space for decimal pt and following digits */
822 if (prec || flags & ALT)
823 size += prec + 1;
824 if ((flags & GROUPING) && expt > 0)
825 size += grouping_init(&gs, expt, locale);
826 }
827 break;
828 #endif /* !NO_FLOATING_POINT */
829 case 'n':
830 /*
831 * Assignment-like behavior is specified if the
832 * value overflows or is otherwise unrepresentable.
833 * C99 says to use `signed char' for %hhn conversions.
834 */
835 if (flags & LLONGINT)
836 *GETARG(long long *) = ret;
837 else if (flags & SIZET)
838 *GETARG(ssize_t *) = (ssize_t)ret;
839 else if (flags & PTRDIFFT)
840 *GETARG(ptrdiff_t *) = ret;
841 else if (flags & INTMAXT)
842 *GETARG(intmax_t *) = ret;
843 else if (flags & LONGINT)
844 *GETARG(long *) = ret;
845 else if (flags & SHORTINT)
846 *GETARG(short *) = ret;
847 else if (flags & CHARINT)
848 *GETARG(signed char *) = ret;
849 else
850 *GETARG(int *) = ret;
851 continue; /* no output */
852 case 'O':
853 flags |= LONGINT;
854 /*FALLTHROUGH*/
855 case 'o':
856 if (flags & INTMAX_SIZE)
857 ujval = UJARG();
858 else
859 ulval = UARG();
860 base = 8;
861 goto nosign;
862 case 'p':
863 /*-
864 * ``The argument shall be a pointer to void. The
865 * value of the pointer is converted to a sequence
866 * of printable characters, in an implementation-
867 * defined manner.''
868 * -- ANSI X3J11
869 */
870 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
871 base = 16;
872 xdigs = xdigs_lower;
873 flags = flags | INTMAXT;
874 ox[1] = 'x';
875 goto nosign;
876 case 'S':
877 flags |= LONGINT;
878 /*FALLTHROUGH*/
879 case 's':
880 if (flags & LONGINT) {
881 if ((cp = GETARG(wchar_t *)) == NULL)
882 cp = L"(null)";
883 } else {
884 char *mbp;
885
886 if (convbuf != NULL)
887 free(convbuf);
888 if ((mbp = GETARG(char *)) == NULL)
889 cp = L"(null)";
890 else {
891 convbuf = __mbsconv(mbp, prec);
892 if (convbuf == NULL) {
893 fp->pub._flags |= __SERR;
894 goto error;
895 }
896 cp = convbuf;
897 }
898 }
899 size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
900 sign = '\0';
901 break;
902 case 'U':
903 flags |= LONGINT;
904 /*FALLTHROUGH*/
905 case 'u':
906 if (flags & INTMAX_SIZE)
907 ujval = UJARG();
908 else
909 ulval = UARG();
910 base = 10;
911 goto nosign;
912 case 'X':
913 xdigs = xdigs_upper;
914 goto hex;
915 case 'x':
916 xdigs = xdigs_lower;
917 hex:
918 if (flags & INTMAX_SIZE)
919 ujval = UJARG();
920 else
921 ulval = UARG();
922 base = 16;
923 /* leading 0x/X only if non-zero */
924 if (flags & ALT &&
925 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
926 ox[1] = ch;
927
928 flags &= ~GROUPING;
929 /* unsigned conversions */
930 nosign: sign = '\0';
931 /*-
932 * ``... diouXx conversions ... if a precision is
933 * specified, the 0 flag will be ignored.''
934 * -- ANSI X3J11
935 */
936 number: if ((dprec = prec) >= 0)
937 flags &= ~ZEROPAD;
938
939 /*-
940 * ``The result of converting a zero value with an
941 * explicit precision of zero is no characters.''
942 * -- ANSI X3J11
943 *
944 * ``The C Standard is clear enough as is. The call
945 * printf("%#.0o", 0) should print 0.''
946 * -- Defect Report #151
947 */
948 cp = buf + BUF;
949 if (flags & INTMAX_SIZE) {
950 if (ujval != 0 || prec != 0 ||
951 (flags & ALT && base == 8))
952 cp = __ujtoa(ujval, cp, base,
953 flags & ALT, xdigs);
954 } else {
955 if (ulval != 0 || prec != 0 ||
956 (flags & ALT && base == 8))
957 cp = __ultoa(ulval, cp, base,
958 flags & ALT, xdigs);
959 }
960 size = buf + BUF - cp;
961 if (size > BUF) /* should never happen */
962 abort();
963 if ((flags & GROUPING) && size != 0)
964 size += grouping_init(&gs, size, locale);
965 break;
966 default: /* "%?" prints ?, unless ? is NUL */
967 if (ch == '\0')
968 goto done;
969 /* pretend it was %c with argument ch */
970 cp = buf;
971 *cp = ch;
972 size = 1;
973 sign = '\0';
974 break;
975 }
976
977 /*
978 * All reasonable formats wind up here. At this point, `cp'
979 * points to a string which (if not flags&LADJUST) should be
980 * padded out to `width' places. If flags&ZEROPAD, it should
981 * first be prefixed by any sign or other prefix; otherwise,
982 * it should be blank padded before the prefix is emitted.
983 * After any left-hand padding and prefixing, emit zeroes
984 * required by a decimal [diouxX] precision, then print the
985 * string proper, then emit zeroes required by any leftover
986 * floating precision; finally, if LADJUST, pad with blanks.
987 *
988 * Compute actual size, so we know how much to pad.
989 * size excludes decimal prec; realsz includes it.
990 */
991 realsz = dprec > size ? dprec : size;
992 if (sign)
993 realsz++;
994 if (ox[1])
995 realsz += 2;
996
997 prsize = width > realsz ? width : realsz;
998 if ((unsigned)ret + prsize > INT_MAX) {
999 ret = EOF;
1000 errno = EOVERFLOW;
1001 goto error;
1002 }
1003
1004 /* right-adjusting blank padding */
1005 if ((flags & (LADJUST|ZEROPAD)) == 0)
1006 PAD(width - realsz, blanks);
1007
1008 /* prefix */
1009 if (sign)
1010 PRINT(&sign, 1);
1011
1012 if (ox[1]) { /* ox[1] is either x, X, or \0 */
1013 ox[0] = '0';
1014 PRINT(ox, 2);
1015 }
1016
1017 /* right-adjusting zero padding */
1018 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1019 PAD(width - realsz, zeroes);
1020
1021 /* the string or number proper */
1022 #ifndef NO_FLOATING_POINT
1023 if ((flags & FPT) == 0) {
1024 #endif
1025 /* leading zeroes from decimal precision */
1026 PAD(dprec - size, zeroes);
1027 if (gs.grouping) {
1028 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
1029 goto error;
1030 } else {
1031 PRINT(cp, size);
1032 }
1033 #ifndef NO_FLOATING_POINT
1034 } else { /* glue together f_p fragments */
1035 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1036 if (expt <= 0) {
1037 PRINT(zeroes, 1);
1038 if (prec || flags & ALT)
1039 PRINT(&decimal_point, 1);
1040 PAD(-expt, zeroes);
1041 /* already handled initial 0's */
1042 prec += expt;
1043 } else {
1044 if (gs.grouping) {
1045 n = grouping_print(&gs, &io,
1046 cp, convbuf + ndig, locale);
1047 if (n < 0)
1048 goto error;
1049 cp += n;
1050 } else {
1051 PRINTANDPAD(cp, convbuf + ndig,
1052 expt, zeroes);
1053 cp += expt;
1054 }
1055 if (prec || flags & ALT)
1056 PRINT(&decimal_point, 1);
1057 }
1058 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1059 } else { /* %[eE] or sufficiently long %[gG] */
1060 if (prec > 1 || flags & ALT) {
1061 buf[0] = *cp++;
1062 buf[1] = decimal_point;
1063 PRINT(buf, 2);
1064 PRINT(cp, ndig-1);
1065 PAD(prec - ndig, zeroes);
1066 } else /* XeYYY */
1067 PRINT(cp, 1);
1068 PRINT(expstr, expsize);
1069 }
1070 }
1071 #endif
1072 /* left-adjusting padding (always blank) */
1073 if (flags & LADJUST)
1074 PAD(width - realsz, blanks);
1075
1076 /* finally, adjust ret */
1077 ret += prsize;
1078
1079 FLUSH(); /* copy out the I/O vectors */
1080 }
1081 done:
1082 FLUSH();
1083 error:
1084 va_end(orgap);
1085 if (convbuf != NULL)
1086 free(convbuf);
1087 if (__sferror(fp))
1088 ret = EOF;
1089 if ((argtable != NULL) && (argtable != statargtable))
1090 free (argtable);
1091 return (ret);
1092 /* NOTREACHED */
1093 }
1094