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)
40static 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
76static int	__sprint(FILE *, struct __suio *, locale_t);
77static int	__sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline;
78static wint_t	__xfputwc(wchar_t, FILE *, locale_t);
79static wchar_t	*__mbsconv(char *, int);
80
81#define	CHAR	wchar_t
82#include "printfcommon.h"
83
84struct 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
92static const mbstate_t initial_mbs;
93
94static inline wchar_t
95get_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
108static inline wchar_t
109get_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 */
128static int
129grouping_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 */
153static int
154grouping_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 */
189static int
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 */
214static int
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 */
251static wint_t
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 */
282static wchar_t *
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 */
352int
353vfwprintf_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}
369int
370vfwprintf(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 */
389int
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		return (EOF);
536
537	convbuf = NULL;
538	fmt = (wchar_t *)fmt0;
539	argtable = NULL;
540	nextarg = 1;
541	va_copy(orgap, ap);
542	io_init(&io, fp);
543	ret = 0;
544#ifndef NO_FLOATING_POINT
545	decimal_point = get_decpt(locale);
546#endif
547
548	/*
549	 * Scan the format for conversions (`%' character).
550	 */
551	for (;;) {
552		for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
553			/* void */;
554		if ((n = fmt - cp) != 0) {
555			if ((unsigned)ret + n > INT_MAX) {
556				ret = EOF;
557				errno = EOVERFLOW;
558				goto error;
559			}
560			PRINT(cp, n);
561			ret += n;
562		}
563		if (ch == '\0')
564			goto done;
565		fmt++;		/* skip over '%' */
566
567		flags = 0;
568		dprec = 0;
569		width = 0;
570		prec = -1;
571		gs.grouping = NULL;
572		sign = '\0';
573		ox[1] = '\0';
574
575rflag:		ch = *fmt++;
576reswitch:	switch (ch) {
577		case ' ':
578			/*-
579			 * ``If the space and + flags both appear, the space
580			 * flag will be ignored.''
581			 *	-- ANSI X3J11
582			 */
583			if (!sign)
584				sign = ' ';
585			goto rflag;
586		case '#':
587			flags |= ALT;
588			goto rflag;
589		case '*':
590			/*-
591			 * ``A negative field width argument is taken as a
592			 * - flag followed by a positive field width.''
593			 *	-- ANSI X3J11
594			 * They don't exclude field widths read from args.
595			 */
596			GETASTER (width);
597			if (width >= 0)
598				goto rflag;
599			width = -width;
600			/* FALLTHROUGH */
601		case '-':
602			flags |= LADJUST;
603			goto rflag;
604		case '+':
605			sign = '+';
606			goto rflag;
607		case '\'':
608			flags |= GROUPING;
609			goto rflag;
610		case '.':
611			if ((ch = *fmt++) == '*') {
612				GETASTER (prec);
613				goto rflag;
614			}
615			prec = 0;
616			while (is_digit(ch)) {
617				prec = 10 * prec + to_digit(ch);
618				ch = *fmt++;
619			}
620			goto reswitch;
621		case '0':
622			/*-
623			 * ``Note that 0 is taken as a flag, not as the
624			 * beginning of a field width.''
625			 *	-- ANSI X3J11
626			 */
627			flags |= ZEROPAD;
628			goto rflag;
629		case '1': case '2': case '3': case '4':
630		case '5': case '6': case '7': case '8': case '9':
631			n = 0;
632			do {
633				n = 10 * n + to_digit(ch);
634				ch = *fmt++;
635			} while (is_digit(ch));
636			if (ch == '$') {
637				nextarg = n;
638				if (argtable == NULL) {
639					argtable = statargtable;
640					if (__find_warguments (fmt0, orgap,
641							       &argtable)) {
642						ret = EOF;
643						goto error;
644					}
645				}
646				goto rflag;
647			}
648			width = n;
649			goto reswitch;
650#ifndef NO_FLOATING_POINT
651		case 'L':
652			flags |= LONGDBL;
653			goto rflag;
654#endif
655		case 'h':
656			if (flags & SHORTINT) {
657				flags &= ~SHORTINT;
658				flags |= CHARINT;
659			} else
660				flags |= SHORTINT;
661			goto rflag;
662		case 'j':
663			flags |= INTMAXT;
664			goto rflag;
665		case 'l':
666			if (flags & LONGINT) {
667				flags &= ~LONGINT;
668				flags |= LLONGINT;
669			} else
670				flags |= LONGINT;
671			goto rflag;
672		case 'q':
673			flags |= LLONGINT;	/* not necessarily */
674			goto rflag;
675		case 't':
676			flags |= PTRDIFFT;
677			goto rflag;
678		case 'z':
679			flags |= SIZET;
680			goto rflag;
681		case 'C':
682			flags |= LONGINT;
683			/*FALLTHROUGH*/
684		case 'c':
685			if (flags & LONGINT)
686				*(cp = buf) = (wchar_t)GETARG(wint_t);
687			else
688				*(cp = buf) = (wchar_t)btowc(GETARG(int));
689			size = 1;
690			sign = '\0';
691			break;
692		case 'D':
693			flags |= LONGINT;
694			/*FALLTHROUGH*/
695		case 'd':
696		case 'i':
697			if (flags & INTMAX_SIZE) {
698				ujval = SJARG();
699				if ((intmax_t)ujval < 0) {
700					ujval = -ujval;
701					sign = '-';
702				}
703			} else {
704				ulval = SARG();
705				if ((long)ulval < 0) {
706					ulval = -ulval;
707					sign = '-';
708				}
709			}
710			base = 10;
711			goto number;
712#ifndef NO_FLOATING_POINT
713		case 'a':
714		case 'A':
715			if (ch == 'a') {
716				ox[1] = 'x';
717				xdigs = xdigs_lower;
718				expchar = 'p';
719			} else {
720				ox[1] = 'X';
721				xdigs = xdigs_upper;
722				expchar = 'P';
723			}
724			if (prec >= 0)
725				prec++;
726			if (flags & LONGDBL) {
727				fparg.ldbl = GETARG(long double);
728				dtoaresult =
729				    __hldtoa(fparg.ldbl, xdigs, prec,
730				        &expt, &signflag, &dtoaend);
731			} else {
732				fparg.dbl = GETARG(double);
733				dtoaresult =
734				    __hdtoa(fparg.dbl, xdigs, prec,
735				        &expt, &signflag, &dtoaend);
736			}
737			if (prec < 0)
738				prec = dtoaend - dtoaresult;
739			if (expt == INT_MAX)
740				ox[1] = '\0';
741			if (convbuf != NULL)
742				free(convbuf);
743			ndig = dtoaend - dtoaresult;
744			cp = convbuf = __mbsconv(dtoaresult, -1);
745			freedtoa(dtoaresult);
746			goto fp_common;
747		case 'e':
748		case 'E':
749			expchar = ch;
750			if (prec < 0)	/* account for digit before decpt */
751				prec = DEFPREC + 1;
752			else
753				prec++;
754			goto fp_begin;
755		case 'f':
756		case 'F':
757			expchar = '\0';
758			goto fp_begin;
759		case 'g':
760		case 'G':
761			expchar = ch - ('g' - 'e');
762			if (prec == 0)
763				prec = 1;
764fp_begin:
765			if (prec < 0)
766				prec = DEFPREC;
767			if (convbuf != NULL)
768				free(convbuf);
769			if (flags & LONGDBL) {
770				fparg.ldbl = GETARG(long double);
771				dtoaresult =
772				    __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
773				    &expt, &signflag, &dtoaend);
774			} else {
775				fparg.dbl = GETARG(double);
776				dtoaresult =
777				    dtoa(fparg.dbl, expchar ? 2 : 3, prec,
778				    &expt, &signflag, &dtoaend);
779				if (expt == 9999)
780					expt = INT_MAX;
781			}
782			ndig = dtoaend - dtoaresult;
783			cp = convbuf = __mbsconv(dtoaresult, -1);
784			freedtoa(dtoaresult);
785fp_common:
786			if (signflag)
787				sign = '-';
788			if (expt == INT_MAX) {	/* inf or nan */
789				if (*cp == 'N') {
790					cp = (ch >= 'a') ? L"nan" : L"NAN";
791					sign = '\0';
792				} else
793					cp = (ch >= 'a') ? L"inf" : L"INF";
794				size = 3;
795				flags &= ~ZEROPAD;
796				break;
797			}
798			flags |= FPT;
799			if (ch == 'g' || ch == 'G') {
800				if (expt > -4 && expt <= prec) {
801					/* Make %[gG] smell like %[fF] */
802					expchar = '\0';
803					if (flags & ALT)
804						prec -= expt;
805					else
806						prec = ndig - expt;
807					if (prec < 0)
808						prec = 0;
809				} else {
810					/*
811					 * Make %[gG] smell like %[eE], but
812					 * trim trailing zeroes if no # flag.
813					 */
814					if (!(flags & ALT))
815						prec = ndig;
816				}
817			}
818			if (expchar) {
819				expsize = exponent(expstr, expt - 1, expchar);
820				size = expsize + prec;
821				if (prec > 1 || flags & ALT)
822					++size;
823			} else {
824				/* space for digits before decimal point */
825				if (expt > 0)
826					size = expt;
827				else	/* "0" */
828					size = 1;
829				/* space for decimal pt and following digits */
830				if (prec || flags & ALT)
831					size += prec + 1;
832				if ((flags & GROUPING) && expt > 0)
833					size += grouping_init(&gs, expt, locale);
834			}
835			break;
836#endif /* !NO_FLOATING_POINT */
837		case 'n':
838			/*
839			 * Assignment-like behavior is specified if the
840			 * value overflows or is otherwise unrepresentable.
841			 * C99 says to use `signed char' for %hhn conversions.
842			 */
843			if (flags & LLONGINT)
844				*GETARG(long long *) = ret;
845			else if (flags & SIZET)
846				*GETARG(ssize_t *) = (ssize_t)ret;
847			else if (flags & PTRDIFFT)
848				*GETARG(ptrdiff_t *) = ret;
849			else if (flags & INTMAXT)
850				*GETARG(intmax_t *) = ret;
851			else if (flags & LONGINT)
852				*GETARG(long *) = ret;
853			else if (flags & SHORTINT)
854				*GETARG(short *) = ret;
855			else if (flags & CHARINT)
856				*GETARG(signed char *) = ret;
857			else
858				*GETARG(int *) = ret;
859			continue;	/* no output */
860		case 'O':
861			flags |= LONGINT;
862			/*FALLTHROUGH*/
863		case 'o':
864			if (flags & INTMAX_SIZE)
865				ujval = UJARG();
866			else
867				ulval = UARG();
868			base = 8;
869			goto nosign;
870		case 'p':
871			/*-
872			 * ``The argument shall be a pointer to void.  The
873			 * value of the pointer is converted to a sequence
874			 * of printable characters, in an implementation-
875			 * defined manner.''
876			 *	-- ANSI X3J11
877			 */
878			ujval = (uintmax_t)(uintptr_t)GETARG(void *);
879			base = 16;
880			xdigs = xdigs_lower;
881			flags = flags | INTMAXT;
882			ox[1] = 'x';
883			goto nosign;
884		case 'S':
885			flags |= LONGINT;
886			/*FALLTHROUGH*/
887		case 's':
888			if (flags & LONGINT) {
889				if ((cp = GETARG(wchar_t *)) == NULL)
890					cp = L"(null)";
891			} else {
892				char *mbp;
893
894				if (convbuf != NULL)
895					free(convbuf);
896				if ((mbp = GETARG(char *)) == NULL)
897					cp = L"(null)";
898				else {
899					convbuf = __mbsconv(mbp, prec);
900					if (convbuf == NULL) {
901						fp->_flags |= __SERR;
902						goto error;
903					}
904					cp = convbuf;
905				}
906			}
907			size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
908			sign = '\0';
909			break;
910		case 'U':
911			flags |= LONGINT;
912			/*FALLTHROUGH*/
913		case 'u':
914			if (flags & INTMAX_SIZE)
915				ujval = UJARG();
916			else
917				ulval = UARG();
918			base = 10;
919			goto nosign;
920		case 'X':
921			xdigs = xdigs_upper;
922			goto hex;
923		case 'x':
924			xdigs = xdigs_lower;
925hex:
926			if (flags & INTMAX_SIZE)
927				ujval = UJARG();
928			else
929				ulval = UARG();
930			base = 16;
931			/* leading 0x/X only if non-zero */
932			if (flags & ALT &&
933			    (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
934				ox[1] = ch;
935
936			flags &= ~GROUPING;
937			/* unsigned conversions */
938nosign:			sign = '\0';
939			/*-
940			 * ``... diouXx conversions ... if a precision is
941			 * specified, the 0 flag will be ignored.''
942			 *	-- ANSI X3J11
943			 */
944number:			if ((dprec = prec) >= 0)
945				flags &= ~ZEROPAD;
946
947			/*-
948			 * ``The result of converting a zero value with an
949			 * explicit precision of zero is no characters.''
950			 *	-- ANSI X3J11
951			 *
952			 * ``The C Standard is clear enough as is.  The call
953			 * printf("%#.0o", 0) should print 0.''
954			 *	-- Defect Report #151
955			 */
956			cp = buf + BUF;
957			if (flags & INTMAX_SIZE) {
958				if (ujval != 0 || prec != 0 ||
959				    (flags & ALT && base == 8))
960					cp = __ujtoa(ujval, cp, base,
961					    flags & ALT, xdigs);
962			} else {
963				if (ulval != 0 || prec != 0 ||
964				    (flags & ALT && base == 8))
965					cp = __ultoa(ulval, cp, base,
966					    flags & ALT, xdigs);
967			}
968			size = buf + BUF - cp;
969			if (size > BUF)	/* should never happen */
970				abort();
971			if ((flags & GROUPING) && size != 0)
972				size += grouping_init(&gs, size, locale);
973			break;
974		default:	/* "%?" prints ?, unless ? is NUL */
975			if (ch == '\0')
976				goto done;
977			/* pretend it was %c with argument ch */
978			cp = buf;
979			*cp = ch;
980			size = 1;
981			sign = '\0';
982			break;
983		}
984
985		/*
986		 * All reasonable formats wind up here.  At this point, `cp'
987		 * points to a string which (if not flags&LADJUST) should be
988		 * padded out to `width' places.  If flags&ZEROPAD, it should
989		 * first be prefixed by any sign or other prefix; otherwise,
990		 * it should be blank padded before the prefix is emitted.
991		 * After any left-hand padding and prefixing, emit zeroes
992		 * required by a decimal [diouxX] precision, then print the
993		 * string proper, then emit zeroes required by any leftover
994		 * floating precision; finally, if LADJUST, pad with blanks.
995		 *
996		 * Compute actual size, so we know how much to pad.
997		 * size excludes decimal prec; realsz includes it.
998		 */
999		realsz = dprec > size ? dprec : size;
1000		if (sign)
1001			realsz++;
1002		if (ox[1])
1003			realsz += 2;
1004
1005		prsize = width > realsz ? width : realsz;
1006		if ((unsigned)ret + prsize > INT_MAX) {
1007			ret = EOF;
1008			errno = EOVERFLOW;
1009			goto error;
1010		}
1011
1012		/* right-adjusting blank padding */
1013		if ((flags & (LADJUST|ZEROPAD)) == 0)
1014			PAD(width - realsz, blanks);
1015
1016		/* prefix */
1017		if (sign)
1018			PRINT(&sign, 1);
1019
1020		if (ox[1]) {	/* ox[1] is either x, X, or \0 */
1021			ox[0] = '0';
1022			PRINT(ox, 2);
1023		}
1024
1025		/* right-adjusting zero padding */
1026		if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1027			PAD(width - realsz, zeroes);
1028
1029		/* the string or number proper */
1030#ifndef NO_FLOATING_POINT
1031		if ((flags & FPT) == 0) {
1032#endif
1033			/* leading zeroes from decimal precision */
1034			PAD(dprec - size, zeroes);
1035			if (gs.grouping) {
1036				if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
1037					goto error;
1038			} else {
1039				PRINT(cp, size);
1040			}
1041#ifndef NO_FLOATING_POINT
1042		} else {	/* glue together f_p fragments */
1043			if (!expchar) {	/* %[fF] or sufficiently short %[gG] */
1044				if (expt <= 0) {
1045					PRINT(zeroes, 1);
1046					if (prec || flags & ALT)
1047						PRINT(&decimal_point, 1);
1048					PAD(-expt, zeroes);
1049					/* already handled initial 0's */
1050					prec += expt;
1051				} else {
1052					if (gs.grouping) {
1053						n = grouping_print(&gs, &io,
1054						    cp, convbuf + ndig, locale);
1055						if (n < 0)
1056							goto error;
1057						cp += n;
1058					} else {
1059						PRINTANDPAD(cp, convbuf + ndig,
1060						    expt, zeroes);
1061						cp += expt;
1062					}
1063					if (prec || flags & ALT)
1064						PRINT(&decimal_point, 1);
1065				}
1066				PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1067			} else {	/* %[eE] or sufficiently long %[gG] */
1068				if (prec > 1 || flags & ALT) {
1069					buf[0] = *cp++;
1070					buf[1] = decimal_point;
1071					PRINT(buf, 2);
1072					PRINT(cp, ndig-1);
1073					PAD(prec - ndig, zeroes);
1074				} else	/* XeYYY */
1075					PRINT(cp, 1);
1076				PRINT(expstr, expsize);
1077			}
1078		}
1079#endif
1080		/* left-adjusting padding (always blank) */
1081		if (flags & LADJUST)
1082			PAD(width - realsz, blanks);
1083
1084		/* finally, adjust ret */
1085		ret += prsize;
1086
1087		FLUSH();	/* copy out the I/O vectors */
1088	}
1089done:
1090	FLUSH();
1091error:
1092	va_end(orgap);
1093	if (convbuf != NULL)
1094		free(convbuf);
1095	if (__sferror(fp))
1096		ret = EOF;
1097	if ((argtable != NULL) && (argtable != statargtable))
1098		free (argtable);
1099	return (ret);
1100	/* NOTREACHED */
1101}
1102