printf-pos.c revision 113194 
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 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#if defined(LIBC_SCCS) && !defined(lint)
38static char sccsid[] = "@(#)vfprintf.c	8.1 (Berkeley) 6/4/93";
39#endif /* LIBC_SCCS and not lint */
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/lib/libc/stdio/vfprintf.c 113194 2003-04-07 01:07:48Z das $");
42
43/*
44 * Actual printf innards.
45 *
46 * This code is large and complicated...
47 */
48
49#include "namespace.h"
50#include <sys/types.h>
51
52#include <ctype.h>
53#include <limits.h>
54#include <locale.h>
55#include <stddef.h>
56#include <stdint.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <wchar.h>
61
62#include <stdarg.h>
63#include "un-namespace.h"
64
65#include "libc_private.h"
66#include "local.h"
67#include "fvwrite.h"
68
69/* Define FLOATING_POINT to get floating point. */
70#define	FLOATING_POINT
71
72union arg {
73	int	intarg;
74	u_int	uintarg;
75	long	longarg;
76	u_long	ulongarg;
77	long long longlongarg;
78	unsigned long long ulonglongarg;
79	ptrdiff_t ptrdiffarg;
80	size_t	sizearg;
81	intmax_t intmaxarg;
82	uintmax_t uintmaxarg;
83	void	*pvoidarg;
84	char	*pchararg;
85	signed char *pschararg;
86	short	*pshortarg;
87	int	*pintarg;
88	long	*plongarg;
89	long long *plonglongarg;
90	ptrdiff_t *pptrdiffarg;
91	size_t	*psizearg;
92	intmax_t *pintmaxarg;
93#ifdef FLOATING_POINT
94	double	doublearg;
95	long double longdoublearg;
96#endif
97	wint_t	wintarg;
98	wchar_t	*pwchararg;
99};
100
101/*
102 * Type ids for argument type table.
103 */
104enum typeid {
105	T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
106	T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
107	T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET,
108	T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
109	T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR
110};
111
112static int	__sprint(FILE *, struct __suio *);
113static int	__sbprintf(FILE *, const char *, va_list) __printflike(2, 0);
114static char	*__ujtoa(uintmax_t, char *, int, int, const char *, int, char,
115		    const char *);
116static char	*__ultoa(u_long, char *, int, int, const char *, int, char,
117		    const char *);
118static char	*__wcsconv(wchar_t *, int);
119static void	__find_arguments(const char *, va_list, union arg **);
120static void	__grow_type_table(int, enum typeid **, int *);
121
122/*
123 * Flush out all the vectors defined by the given uio,
124 * then reset it so that it can be reused.
125 */
126static int
127__sprint(FILE *fp, struct __suio *uio)
128{
129	int err;
130
131	if (uio->uio_resid == 0) {
132		uio->uio_iovcnt = 0;
133		return (0);
134	}
135	err = __sfvwrite(fp, uio);
136	uio->uio_resid = 0;
137	uio->uio_iovcnt = 0;
138	return (err);
139}
140
141/*
142 * Helper function for `fprintf to unbuffered unix file': creates a
143 * temporary buffer.  We only work on write-only files; this avoids
144 * worries about ungetc buffers and so forth.
145 */
146static int
147__sbprintf(FILE *fp, const char *fmt, va_list ap)
148{
149	int ret;
150	FILE fake;
151	unsigned char buf[BUFSIZ];
152
153	/* copy the important variables */
154	fake._flags = fp->_flags & ~__SNBF;
155	fake._file = fp->_file;
156	fake._cookie = fp->_cookie;
157	fake._write = fp->_write;
158	fake._extra = fp->_extra;
159
160	/* set up the buffer */
161	fake._bf._base = fake._p = buf;
162	fake._bf._size = fake._w = sizeof(buf);
163	fake._lbfsize = 0;	/* not actually used, but Just In Case */
164
165	/* do the work, then copy any error status */
166	ret = __vfprintf(&fake, fmt, ap);
167	if (ret >= 0 && __fflush(&fake))
168		ret = EOF;
169	if (fake._flags & __SERR)
170		fp->_flags |= __SERR;
171	return (ret);
172}
173
174/*
175 * Macros for converting digits to letters and vice versa
176 */
177#define	to_digit(c)	((c) - '0')
178#define is_digit(c)	((unsigned)to_digit(c) <= 9)
179#define	to_char(n)	((n) + '0')
180
181/*
182 * Convert an unsigned long to ASCII for printf purposes, returning
183 * a pointer to the first character of the string representation.
184 * Octal numbers can be forced to have a leading zero; hex numbers
185 * use the given digits.
186 */
187static char *
188__ultoa(u_long val, char *endp, int base, int octzero, const char *xdigs,
189	int needgrp, char thousep, const char *grp)
190{
191	char *cp = endp;
192	long sval;
193	int ndig;
194
195	/*
196	 * Handle the three cases separately, in the hope of getting
197	 * better/faster code.
198	 */
199	switch (base) {
200	case 10:
201		if (val < 10) {	/* many numbers are 1 digit */
202			*--cp = to_char(val);
203			return (cp);
204		}
205		ndig = 0;
206		/*
207		 * On many machines, unsigned arithmetic is harder than
208		 * signed arithmetic, so we do at most one unsigned mod and
209		 * divide; this is sufficient to reduce the range of
210		 * the incoming value to where signed arithmetic works.
211		 */
212		if (val > LONG_MAX) {
213			*--cp = to_char(val % 10);
214			ndig++;
215			sval = val / 10;
216		} else
217			sval = val;
218		do {
219			*--cp = to_char(sval % 10);
220			ndig++;
221			/*
222			 * If (*grp == CHAR_MAX) then no more grouping
223			 * should be performed.
224			 */
225			if (needgrp && ndig == *grp && *grp != CHAR_MAX
226					&& sval > 9) {
227				*--cp = thousep;
228				ndig = 0;
229				/*
230				 * If (*(grp+1) == '\0') then we have to
231				 * use *grp character (last grouping rule)
232				 * for all next cases
233				 */
234				if (*(grp+1) != '\0')
235					grp++;
236			}
237			sval /= 10;
238		} while (sval != 0);
239		break;
240
241	case 8:
242		do {
243			*--cp = to_char(val & 7);
244			val >>= 3;
245		} while (val);
246		if (octzero && *cp != '0')
247			*--cp = '0';
248		break;
249
250	case 16:
251		do {
252			*--cp = xdigs[val & 15];
253			val >>= 4;
254		} while (val);
255		break;
256
257	default:			/* oops */
258		abort();
259	}
260	return (cp);
261}
262
263/* Identical to __ultoa, but for intmax_t. */
264static char *
265__ujtoa(uintmax_t val, char *endp, int base, int octzero, const char *xdigs,
266	int needgrp, char thousep, const char *grp)
267{
268	char *cp = endp;
269	intmax_t sval;
270	int ndig;
271
272	/* quick test for small values; __ultoa is typically much faster */
273	/* (perhaps instead we should run until small, then call __ultoa?) */
274	if (val <= ULONG_MAX)
275		return (__ultoa((u_long)val, endp, base, octzero, xdigs,
276		    needgrp, thousep, grp));
277	switch (base) {
278	case 10:
279		if (val < 10) {
280			*--cp = to_char(val % 10);
281			return (cp);
282		}
283		ndig = 0;
284		if (val > INTMAX_MAX) {
285			*--cp = to_char(val % 10);
286			ndig++;
287			sval = val / 10;
288		} else
289			sval = val;
290		do {
291			*--cp = to_char(sval % 10);
292			ndig++;
293			/*
294			 * If (*grp == CHAR_MAX) then no more grouping
295			 * should be performed.
296			 */
297			if (needgrp && *grp != CHAR_MAX && ndig == *grp
298					&& sval > 9) {
299				*--cp = thousep;
300				ndig = 0;
301				/*
302				 * If (*(grp+1) == '\0') then we have to
303				 * use *grp character (last grouping rule)
304				 * for all next cases
305				 */
306				if (*(grp+1) != '\0')
307					grp++;
308			}
309			sval /= 10;
310		} while (sval != 0);
311		break;
312
313	case 8:
314		do {
315			*--cp = to_char(val & 7);
316			val >>= 3;
317		} while (val);
318		if (octzero && *cp != '0')
319			*--cp = '0';
320		break;
321
322	case 16:
323		do {
324			*--cp = xdigs[val & 15];
325			val >>= 4;
326		} while (val);
327		break;
328
329	default:
330		abort();
331	}
332	return (cp);
333}
334
335/*
336 * Convert a wide character string argument for the %ls format to a multibyte
337 * string representation. ``prec'' specifies the maximum number of bytes
338 * to output. If ``prec'' is greater than or equal to zero, we can't assume
339 * that the wide char. string ends in a null character.
340 */
341static char *
342__wcsconv(wchar_t *wcsarg, int prec)
343{
344	char buf[MB_LEN_MAX];
345	wchar_t *p;
346	char *convbuf, *mbp;
347	size_t clen, nbytes;
348	mbstate_t mbs;
349
350	/*
351	 * Determine the number of bytes to output and allocate space for
352	 * the output.
353	 */
354	memset(&mbs, 0, sizeof(mbs));
355	if (prec >= 0) {
356		nbytes = 0;
357		p = wcsarg;
358		for (;;) {
359			clen = wcrtomb(buf, *p++, &mbs);
360			if (clen == 0 || clen == (size_t)-1 ||
361			    nbytes + clen > prec)
362				break;
363			nbytes += clen;
364		}
365	} else {
366		p = wcsarg;
367		nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
368		if (nbytes == (size_t)-1)
369			return (NULL);
370	}
371	if ((convbuf = malloc(nbytes + 1)) == NULL)
372		return (NULL);
373
374	/*
375	 * Fill the output buffer with the multibyte representations of as
376	 * many wide characters as will fit.
377	 */
378	mbp = convbuf;
379	p = wcsarg;
380	memset(&mbs, 0, sizeof(mbs));
381	while (mbp - convbuf < nbytes) {
382		clen = wcrtomb(mbp, *p++, &mbs);
383		if (clen == 0 || clen == (size_t)-1)
384			break;
385		mbp += clen;
386	}
387	*mbp = '\0';
388	if (clen == (size_t)-1)
389		return (NULL);
390
391	return (convbuf);
392}
393
394/*
395 * MT-safe version
396 */
397int
398vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap)
399
400{
401	int ret;
402
403	FLOCKFILE(fp);
404	ret = __vfprintf(fp, fmt0, ap);
405	FUNLOCKFILE(fp);
406	return (ret);
407}
408
409#ifdef FLOATING_POINT
410
411#define	dtoa		__dtoa
412#define	freedtoa	__freedtoa
413
414#include <float.h>
415#include <math.h>
416#include "floatio.h"
417#include "gdtoa.h"
418
419#define	DEFPREC		6
420
421static int exponent(char *, int, int);
422
423#endif /* FLOATING_POINT */
424
425/*
426 * The size of the buffer we use as scratch space for integer
427 * conversions, among other things.  Technically, we would need the
428 * most space for base 10 conversions with thousands' grouping
429 * characters between each pair of digits.  100 bytes is a
430 * conservative overestimate even for a 128-bit uintmax_t.
431 */
432#define	BUF	100
433
434#define STATIC_ARG_TBL_SIZE 8           /* Size of static argument table. */
435
436/*
437 * Flags used during conversion.
438 */
439#define	ALT		0x001		/* alternate form */
440#define	LADJUST		0x004		/* left adjustment */
441#define	LONGDBL		0x008		/* long double */
442#define	LONGINT		0x010		/* long integer */
443#define	LLONGINT	0x020		/* long long integer */
444#define	SHORTINT	0x040		/* short integer */
445#define	ZEROPAD		0x080		/* zero (as opposed to blank) pad */
446#define	FPT		0x100		/* Floating point number */
447#define	GROUPING	0x200		/* use grouping ("'" flag) */
448					/* C99 additional size modifiers: */
449#define	SIZET		0x400		/* size_t */
450#define	PTRDIFFT	0x800		/* ptrdiff_t */
451#define	INTMAXT		0x1000		/* intmax_t */
452#define	CHARINT		0x2000		/* print char using int format */
453
454/*
455 * Non-MT-safe version
456 */
457int
458__vfprintf(FILE *fp, const char *fmt0, va_list ap)
459{
460	char *fmt;		/* format string */
461	int ch;			/* character from fmt */
462	int n, n2;		/* handy integer (short term usage) */
463	char *cp;		/* handy char pointer (short term usage) */
464	struct __siov *iovp;	/* for PRINT macro */
465	int flags;		/* flags as above */
466	int ret;		/* return value accumulator */
467	int width;		/* width from format (%8d), or 0 */
468	int prec;		/* precision from format; <0 for N/A */
469	char sign;		/* sign prefix (' ', '+', '-', or \0) */
470	char thousands_sep;	/* locale specific thousands separator */
471	const char *grouping;	/* locale specific numeric grouping rules */
472#ifdef FLOATING_POINT
473	/*
474	 * We can decompose the printed representation of floating
475	 * point numbers into several parts, some of which may be empty:
476	 *
477	 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
478	 *    A       B     ---C---      D       E   F
479	 *
480	 * A:	'sign' holds this value if present; '\0' otherwise
481	 * B:	ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
482	 * C:	cp points to the string MMMNNN.  Leading and trailing
483	 *	zeros are not in the string and must be added.
484	 * D:	expchar holds this character; '\0' if no exponent, e.g. %f
485	 * F:	at least two digits for decimal, at least one digit for hex
486	 */
487	char *decimal_point;	/* locale specific decimal point */
488	int signflag;		/* true if float is negative */
489	union {			/* floating point arguments %[aAeEfFgG] */
490		double dbl;
491		long double ldbl;
492	} fparg;
493	int expt;		/* integer value of exponent */
494	char expchar;		/* exponent character: [eEpP\0] */
495	char *dtoaend;		/* pointer to end of converted digits */
496	int expsize;		/* character count for expstr */
497	int lead;		/* sig figs before decimal or group sep */
498	int ndig;		/* actual number of digits returned by dtoa */
499	char expstr[MAXEXPDIG+2];	/* buffer for exponent string: e+ZZZ */
500	char *dtoaresult;	/* buffer allocated by dtoa */
501	int nseps;		/* number of group separators with ' */
502	int nrepeats;		/* number of repeats of the last group */
503#endif
504	u_long	ulval;		/* integer arguments %[diouxX] */
505	uintmax_t ujval;	/* %j, %ll, %q, %t, %z integers */
506	int base;		/* base for [diouxX] conversion */
507	int dprec;		/* a copy of prec if [diouxX], 0 otherwise */
508	int realsz;		/* field size expanded by dprec, sign, etc */
509	int size;		/* size of converted field or string */
510	int prsize;             /* max size of printed field */
511	const char *xdigs;     	/* digits for %[xX] conversion */
512#define NIOV 8
513	struct __suio uio;	/* output information: summary */
514	struct __siov iov[NIOV];/* ... and individual io vectors */
515	char buf[BUF];		/* buffer with space for digits of uintmax_t */
516	char ox[2];		/* space for 0x; ox[1] is either x, X, or \0 */
517	union arg *argtable;    /* args, built due to positional arg */
518	union arg statargtable [STATIC_ARG_TBL_SIZE];
519	int nextarg;            /* 1-based argument index */
520	va_list orgap;          /* original argument pointer */
521	char *convbuf;		/* wide to multibyte conversion result */
522
523	/*
524	 * Choose PADSIZE to trade efficiency vs. size.  If larger printf
525	 * fields occur frequently, increase PADSIZE and make the initialisers
526	 * below longer.
527	 */
528#define	PADSIZE	16		/* pad chunk size */
529	static char blanks[PADSIZE] =
530	 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
531	static char zeroes[PADSIZE] =
532	 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
533
534	static const char xdigs_lower[16] = "0123456789abcdef";
535	static const char xdigs_upper[16] = "0123456789ABCDEF";
536
537	/*
538	 * BEWARE, these `goto error' on error, and PAD uses `n'.
539	 */
540#define	PRINT(ptr, len) { \
541	iovp->iov_base = (ptr); \
542	iovp->iov_len = (len); \
543	uio.uio_resid += (len); \
544	iovp++; \
545	if (++uio.uio_iovcnt >= NIOV) { \
546		if (__sprint(fp, &uio)) \
547			goto error; \
548		iovp = iov; \
549	} \
550}
551#define	PAD(howmany, with) { \
552	if ((n = (howmany)) > 0) { \
553		while (n > PADSIZE) { \
554			PRINT(with, PADSIZE); \
555			n -= PADSIZE; \
556		} \
557		PRINT(with, n); \
558	} \
559}
560#define	PRINTANDPAD(p, ep, len, with) do {	\
561	n2 = (ep) - (p);       			\
562	if (n2 > (len))				\
563		n2 = (len);			\
564	if (n2 > 0)				\
565		PRINT((p), n2);			\
566	PAD((len) - (n2 > 0 ? n2 : 0), (with));	\
567} while(0)
568#define	FLUSH() { \
569	if (uio.uio_resid && __sprint(fp, &uio)) \
570		goto error; \
571	uio.uio_iovcnt = 0; \
572	iovp = iov; \
573}
574
575	/*
576	 * Get the argument indexed by nextarg.   If the argument table is
577	 * built, use it to get the argument.  If its not, get the next
578	 * argument (and arguments must be gotten sequentially).
579	 */
580#define GETARG(type) \
581	((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
582	    (nextarg++, va_arg(ap, type)))
583
584	/*
585	 * To extend shorts properly, we need both signed and unsigned
586	 * argument extraction methods.
587	 */
588#define	SARG() \
589	(flags&LONGINT ? GETARG(long) : \
590	    flags&SHORTINT ? (long)(short)GETARG(int) : \
591	    flags&CHARINT ? (long)(signed char)GETARG(int) : \
592	    (long)GETARG(int))
593#define	UARG() \
594	(flags&LONGINT ? GETARG(u_long) : \
595	    flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
596	    flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
597	    (u_long)GETARG(u_int))
598#define	INTMAX_SIZE	(INTMAXT|SIZET|PTRDIFFT|LLONGINT)
599#define SJARG() \
600	(flags&INTMAXT ? GETARG(intmax_t) : \
601	    flags&SIZET ? (intmax_t)GETARG(size_t) : \
602	    flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
603	    (intmax_t)GETARG(long long))
604#define	UJARG() \
605	(flags&INTMAXT ? GETARG(uintmax_t) : \
606	    flags&SIZET ? (uintmax_t)GETARG(size_t) : \
607	    flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
608	    (uintmax_t)GETARG(unsigned long long))
609
610	/*
611	 * Get * arguments, including the form *nn$.  Preserve the nextarg
612	 * that the argument can be gotten once the type is determined.
613	 */
614#define GETASTER(val) \
615	n2 = 0; \
616	cp = fmt; \
617	while (is_digit(*cp)) { \
618		n2 = 10 * n2 + to_digit(*cp); \
619		cp++; \
620	} \
621	if (*cp == '$') { \
622		int hold = nextarg; \
623		if (argtable == NULL) { \
624			argtable = statargtable; \
625			__find_arguments (fmt0, orgap, &argtable); \
626		} \
627		nextarg = n2; \
628		val = GETARG (int); \
629		nextarg = hold; \
630		fmt = ++cp; \
631	} else { \
632		val = GETARG (int); \
633	}
634
635
636	thousands_sep = '\0';
637	grouping = NULL;
638	convbuf = NULL;
639#ifdef FLOATING_POINT
640	dtoaresult = NULL;
641	decimal_point = localeconv()->decimal_point;
642#endif
643	/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
644	if (cantwrite(fp))
645		return (EOF);
646
647	/* optimise fprintf(stderr) (and other unbuffered Unix files) */
648	if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
649	    fp->_file >= 0)
650		return (__sbprintf(fp, fmt0, ap));
651
652	fmt = (char *)fmt0;
653	argtable = NULL;
654	nextarg = 1;
655	va_copy(orgap, ap);
656	uio.uio_iov = iovp = iov;
657	uio.uio_resid = 0;
658	uio.uio_iovcnt = 0;
659	ret = 0;
660
661	/*
662	 * Scan the format for conversions (`%' character).
663	 */
664	for (;;) {
665		for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
666			/* void */;
667		if ((n = fmt - cp) != 0) {
668			if ((unsigned)ret + n > INT_MAX) {
669				ret = EOF;
670				goto error;
671			}
672			PRINT(cp, n);
673			ret += n;
674		}
675		if (ch == '\0')
676			goto done;
677		fmt++;		/* skip over '%' */
678
679		flags = 0;
680		dprec = 0;
681		width = 0;
682		prec = -1;
683		sign = '\0';
684		ox[1] = '\0';
685
686rflag:		ch = *fmt++;
687reswitch:	switch (ch) {
688		case ' ':
689			/*-
690			 * ``If the space and + flags both appear, the space
691			 * flag will be ignored.''
692			 *	-- ANSI X3J11
693			 */
694			if (!sign)
695				sign = ' ';
696			goto rflag;
697		case '#':
698			flags |= ALT;
699			goto rflag;
700		case '*':
701			/*-
702			 * ``A negative field width argument is taken as a
703			 * - flag followed by a positive field width.''
704			 *	-- ANSI X3J11
705			 * They don't exclude field widths read from args.
706			 */
707			GETASTER (width);
708			if (width >= 0)
709				goto rflag;
710			width = -width;
711			/* FALLTHROUGH */
712		case '-':
713			flags |= LADJUST;
714			goto rflag;
715		case '+':
716			sign = '+';
717			goto rflag;
718		case '\'':
719			flags |= GROUPING;
720			thousands_sep = *(localeconv()->thousands_sep);
721			grouping = localeconv()->grouping;
722			goto rflag;
723		case '.':
724			if ((ch = *fmt++) == '*') {
725				GETASTER (prec);
726				goto rflag;
727			}
728			prec = 0;
729			while (is_digit(ch)) {
730				prec = 10 * prec + to_digit(ch);
731				ch = *fmt++;
732			}
733			goto reswitch;
734		case '0':
735			/*-
736			 * ``Note that 0 is taken as a flag, not as the
737			 * beginning of a field width.''
738			 *	-- ANSI X3J11
739			 */
740			flags |= ZEROPAD;
741			goto rflag;
742		case '1': case '2': case '3': case '4':
743		case '5': case '6': case '7': case '8': case '9':
744			n = 0;
745			do {
746				n = 10 * n + to_digit(ch);
747				ch = *fmt++;
748			} while (is_digit(ch));
749			if (ch == '$') {
750				nextarg = n;
751				if (argtable == NULL) {
752					argtable = statargtable;
753					__find_arguments (fmt0, orgap,
754					    &argtable);
755				}
756				goto rflag;
757			}
758			width = n;
759			goto reswitch;
760#ifdef FLOATING_POINT
761		case 'L':
762			flags |= LONGDBL;
763			goto rflag;
764#endif
765		case 'h':
766			if (flags & SHORTINT) {
767				flags &= ~SHORTINT;
768				flags |= CHARINT;
769			} else
770				flags |= SHORTINT;
771			goto rflag;
772		case 'j':
773			flags |= INTMAXT;
774			goto rflag;
775		case 'l':
776			if (flags & LONGINT) {
777				flags &= ~LONGINT;
778				flags |= LLONGINT;
779			} else
780				flags |= LONGINT;
781			goto rflag;
782		case 'q':
783			flags |= LLONGINT;	/* not necessarily */
784			goto rflag;
785		case 't':
786			flags |= PTRDIFFT;
787			goto rflag;
788		case 'z':
789			flags |= SIZET;
790			goto rflag;
791		case 'C':
792			flags |= LONGINT;
793			/*FALLTHROUGH*/
794		case 'c':
795			if (flags & LONGINT) {
796				mbstate_t mbs;
797				size_t mbseqlen;
798
799				memset(&mbs, 0, sizeof(mbs));
800				mbseqlen = wcrtomb(cp = buf,
801				    (wchar_t)GETARG(wint_t), &mbs);
802				if (mbseqlen == (size_t)-1) {
803					fp->_flags |= __SERR;
804					goto error;
805				}
806				size = (int)mbseqlen;
807			} else {
808				*(cp = buf) = GETARG(int);
809				size = 1;
810			}
811			sign = '\0';
812			break;
813		case 'D':
814			flags |= LONGINT;
815			/*FALLTHROUGH*/
816		case 'd':
817		case 'i':
818			if (flags & INTMAX_SIZE) {
819				ujval = SJARG();
820				if ((intmax_t)ujval < 0) {
821					ujval = -ujval;
822					sign = '-';
823				}
824			} else {
825				ulval = SARG();
826				if ((long)ulval < 0) {
827					ulval = -ulval;
828					sign = '-';
829				}
830			}
831			base = 10;
832			goto number;
833#ifdef FLOATING_POINT
834#ifdef HEXFLOAT
835		case 'a':
836		case 'A':
837			if (ch == 'a') {
838				ox[1] = 'x';
839				xdigs = xdigs_lower;
840				expchar = 'p';
841			} else {
842				ox[1] = 'X';
843				xdigs = xdigs_upper;
844				expchar = 'P';
845			}
846			/*
847			 * XXX We don't actually have a conversion
848			 * XXX routine for this yet.
849			 */
850			if (flags & LONGDBL) {
851				fparg.ldbl = (double)GETARG(long double);
852				dtoaresult = cp =
853				    __hldtoa(fparg.ldbl, xdigs, prec,
854				    &expt, &signflag, &dtoaend);
855			} else {
856				fparg.dbl = GETARG(double);
857				dtoaresult = cp =
858				    __hdtoa(fparg.dbl, xdigs, prec,
859				    &expt, &signflag, &dtoaend);
860			}
861			goto fp_begin;
862#endif
863		case 'e':
864		case 'E':
865			expchar = ch;
866			if (prec < 0)	/* account for digit before decpt */
867				prec = DEFPREC + 1;
868			else
869				prec++;
870			goto fp_begin;
871		case 'f':
872		case 'F':
873			expchar = '\0';
874			goto fp_begin;
875		case 'g':
876		case 'G':
877			expchar = ch - ('g' - 'e');
878			if (prec == 0)
879				prec = 1;
880fp_begin:
881			if (prec < 0)
882				prec = DEFPREC;
883			if (dtoaresult != NULL)
884				freedtoa(dtoaresult);
885			if (flags & LONGDBL) {
886				fparg.ldbl = GETARG(long double);
887				dtoaresult = cp =
888				    __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
889				    &expt, &signflag, &dtoaend);
890			} else {
891				fparg.dbl = GETARG(double);
892				dtoaresult = cp =
893				    dtoa(fparg.dbl, expchar ? 2 : 3, prec,
894				    &expt, &signflag, &dtoaend);
895				if (expt == 9999)
896					expt = INT_MAX;
897			}
898			if (signflag)
899				sign = '-';
900			if (expt == INT_MAX) {	/* inf or nan */
901				if (*cp == 'N') {
902					cp = (ch >= 'a') ? "nan" : "NAN";
903					sign = '\0';
904				} else
905					cp = (ch >= 'a') ? "inf" : "INF";
906				size = 3;
907				break;
908			}
909			flags |= FPT;
910			ndig = dtoaend - cp;
911			if (ch == 'g' || ch == 'G') {
912				if (expt > -4 && expt <= prec) {
913					/* Make %[gG] smell like %[fF] */
914					expchar = '\0';
915					if (flags & ALT)
916						prec -= expt;
917					else
918						prec = ndig - expt;
919					if (prec < 0)
920						prec = 0;
921				}
922			}
923			if (expchar) {
924				expsize = exponent(expstr, expt - 1, expchar);
925				size = expsize + prec;
926				if (prec > 1 || flags & ALT)
927					++size;
928			} else {
929				if (expt > 0) {
930					size = expt;
931					if (prec || flags & ALT)
932						size += prec + 1;
933				} else	/* "0.X" */
934					size = prec + 2;
935				if (grouping && expt > 0) {
936					/* space for thousands' grouping */
937					nseps = nrepeats = 0;
938					lead = expt;
939					while (*grouping != CHAR_MAX) {
940						if (lead <= *grouping)
941							break;
942						lead -= *grouping;
943						if (*(grouping+1)) {
944							nseps++;
945							grouping++;
946						} else
947							nrepeats++;
948					}
949					size += nseps + nrepeats;
950				} else
951					lead = expt;
952			}
953			break;
954#endif /* FLOATING_POINT */
955		case 'n':
956			/*
957			 * Assignment-like behavior is specified if the
958			 * value overflows or is otherwise unrepresentable.
959			 * C99 says to use `signed char' for %hhn conversions.
960			 */
961			if (flags & LLONGINT)
962				*GETARG(long long *) = ret;
963			else if (flags & SIZET)
964				*GETARG(ssize_t *) = (ssize_t)ret;
965			else if (flags & PTRDIFFT)
966				*GETARG(ptrdiff_t *) = ret;
967			else if (flags & INTMAXT)
968				*GETARG(intmax_t *) = ret;
969			else if (flags & LONGINT)
970				*GETARG(long *) = ret;
971			else if (flags & SHORTINT)
972				*GETARG(short *) = ret;
973			else if (flags & CHARINT)
974				*GETARG(signed char *) = ret;
975			else
976				*GETARG(int *) = ret;
977			continue;	/* no output */
978		case 'O':
979			flags |= LONGINT;
980			/*FALLTHROUGH*/
981		case 'o':
982			if (flags & INTMAX_SIZE)
983				ujval = UJARG();
984			else
985				ulval = UARG();
986			base = 8;
987			goto nosign;
988		case 'p':
989			/*-
990			 * ``The argument shall be a pointer to void.  The
991			 * value of the pointer is converted to a sequence
992			 * of printable characters, in an implementation-
993			 * defined manner.''
994			 *	-- ANSI X3J11
995			 */
996			ujval = (uintmax_t)(uintptr_t)GETARG(void *);
997			base = 16;
998			xdigs = xdigs_lower;
999			flags = flags | INTMAXT;
1000			ox[1] = 'x';
1001			goto nosign;
1002		case 'S':
1003			flags |= LONGINT;
1004			/*FALLTHROUGH*/
1005		case 's':
1006			if (flags & LONGINT) {
1007				wchar_t *wcp;
1008
1009				if (convbuf != NULL)
1010					free(convbuf);
1011				if ((wcp = GETARG(wchar_t *)) == NULL)
1012					cp = "(null)";
1013				else {
1014					convbuf = __wcsconv(wcp, prec);
1015					if (convbuf == NULL) {
1016						fp->_flags |= __SERR;
1017						goto error;
1018					}
1019					cp = convbuf;
1020				}
1021			} else if ((cp = GETARG(char *)) == NULL)
1022				cp = "(null)";
1023			if (prec >= 0) {
1024				/*
1025				 * can't use strlen; can only look for the
1026				 * NUL in the first `prec' characters, and
1027				 * strlen() will go further.
1028				 */
1029				char *p = memchr(cp, 0, (size_t)prec);
1030
1031				if (p != NULL) {
1032					size = p - cp;
1033					if (size > prec)
1034						size = prec;
1035				} else
1036					size = prec;
1037			} else
1038				size = strlen(cp);
1039			sign = '\0';
1040			break;
1041		case 'U':
1042			flags |= LONGINT;
1043			/*FALLTHROUGH*/
1044		case 'u':
1045			if (flags & INTMAX_SIZE)
1046				ujval = UJARG();
1047			else
1048				ulval = UARG();
1049			base = 10;
1050			goto nosign;
1051		case 'X':
1052			xdigs = xdigs_upper;
1053			goto hex;
1054		case 'x':
1055			xdigs = xdigs_lower;
1056hex:
1057			if (flags & INTMAX_SIZE)
1058				ujval = UJARG();
1059			else
1060				ulval = UARG();
1061			base = 16;
1062			/* leading 0x/X only if non-zero */
1063			if (flags & ALT &&
1064			    (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
1065				ox[1] = ch;
1066
1067			flags &= ~GROUPING;
1068			/* unsigned conversions */
1069nosign:			sign = '\0';
1070			/*-
1071			 * ``... diouXx conversions ... if a precision is
1072			 * specified, the 0 flag will be ignored.''
1073			 *	-- ANSI X3J11
1074			 */
1075number:			if ((dprec = prec) >= 0)
1076				flags &= ~ZEROPAD;
1077
1078			/*-
1079			 * ``The result of converting a zero value with an
1080			 * explicit precision of zero is no characters.''
1081			 *	-- ANSI X3J11
1082			 */
1083			cp = buf + BUF;
1084			if (flags & INTMAX_SIZE) {
1085				if (ujval != 0 || prec != 0)
1086					cp = __ujtoa(ujval, cp, base,
1087					    flags & ALT, xdigs,
1088					    flags & GROUPING, thousands_sep,
1089					    grouping);
1090			} else {
1091				if (ulval != 0 || prec != 0)
1092					cp = __ultoa(ulval, cp, base,
1093					    flags & ALT, xdigs,
1094					    flags & GROUPING, thousands_sep,
1095					    grouping);
1096			}
1097			size = buf + BUF - cp;
1098			if (size > BUF)	/* should never happen */
1099				abort();
1100			break;
1101		default:	/* "%?" prints ?, unless ? is NUL */
1102			if (ch == '\0')
1103				goto done;
1104			/* pretend it was %c with argument ch */
1105			cp = buf;
1106			*cp = ch;
1107			size = 1;
1108			sign = '\0';
1109			break;
1110		}
1111
1112		/*
1113		 * All reasonable formats wind up here.  At this point, `cp'
1114		 * points to a string which (if not flags&LADJUST) should be
1115		 * padded out to `width' places.  If flags&ZEROPAD, it should
1116		 * first be prefixed by any sign or other prefix; otherwise,
1117		 * it should be blank padded before the prefix is emitted.
1118		 * After any left-hand padding and prefixing, emit zeroes
1119		 * required by a decimal [diouxX] precision, then print the
1120		 * string proper, then emit zeroes required by any leftover
1121		 * floating precision; finally, if LADJUST, pad with blanks.
1122		 *
1123		 * Compute actual size, so we know how much to pad.
1124		 * size excludes decimal prec; realsz includes it.
1125		 */
1126		realsz = dprec > size ? dprec : size;
1127		if (sign)
1128			realsz++;
1129		else if (ox[1])
1130			realsz += 2;
1131
1132		prsize = width > realsz ? width : realsz;
1133		if ((unsigned)ret + prsize > INT_MAX) {
1134			ret = EOF;
1135			goto error;
1136		}
1137
1138		/* right-adjusting blank padding */
1139		if ((flags & (LADJUST|ZEROPAD)) == 0)
1140			PAD(width - realsz, blanks);
1141
1142		/* prefix */
1143		if (sign) {
1144			PRINT(&sign, 1);
1145		} else if (ox[1]) {	/* ox[1] is either x, X, or \0 */
1146			ox[0] = '0';
1147			PRINT(ox, 2);
1148		}
1149
1150		/* right-adjusting zero padding */
1151		if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1152			PAD(width - realsz, zeroes);
1153
1154		/* leading zeroes from decimal precision */
1155		PAD(dprec - size, zeroes);
1156
1157		/* the string or number proper */
1158#ifdef FLOATING_POINT
1159		if ((flags & FPT) == 0) {
1160			PRINT(cp, size);
1161		} else {	/* glue together f_p fragments */
1162			if (!expchar) {	/* %[fF] or sufficiently short %[gG] */
1163				if (expt <= 0) {
1164					buf[0] = '0';
1165					buf[1] = *decimal_point;
1166					PRINT(buf, 2);
1167					PAD(-expt, zeroes);
1168					/* already handled initial 0's */
1169					prec += expt;
1170				} else {
1171					PRINTANDPAD(cp, dtoaend, lead, zeroes);
1172					cp += lead;
1173					if (grouping) {
1174						while (nseps>0 || nrepeats>0) {
1175							if (nrepeats > 0)
1176								nrepeats--;
1177							else {
1178								grouping--;
1179								nseps--;
1180							}
1181							PRINT(&thousands_sep,
1182							    1);
1183							PRINTANDPAD(cp,dtoaend,
1184							    *grouping, zeroes);
1185							cp += *grouping;
1186						}
1187						if (cp > dtoaend)
1188							cp = dtoaend;
1189					}
1190					if (prec || flags & ALT)
1191						PRINT(decimal_point,1);
1192				}
1193				PRINTANDPAD(cp, dtoaend, prec, zeroes);
1194			} else {	/* %[eE] or sufficiently long %[gG] */
1195				if (prec > 1 || flags & ALT) {
1196					buf[0] = *cp++;
1197					buf[1] = *decimal_point;
1198					PRINT(buf, 2);
1199					PRINT(cp, ndig-1);
1200					PAD(prec - ndig, zeroes);
1201				} else	/* XeYYY */
1202					PRINT(cp, 1);
1203				PRINT(expstr, expsize);
1204			}
1205		}
1206#else
1207		PRINT(cp, size);
1208#endif
1209		/* left-adjusting padding (always blank) */
1210		if (flags & LADJUST)
1211			PAD(width - realsz, blanks);
1212
1213		/* finally, adjust ret */
1214		ret += prsize;
1215
1216		FLUSH();	/* copy out the I/O vectors */
1217	}
1218done:
1219	FLUSH();
1220error:
1221#ifdef FLOATING_POINT
1222	if (dtoaresult != NULL)
1223		freedtoa(dtoaresult);
1224#endif
1225	if (convbuf != NULL)
1226		free(convbuf);
1227	if (__sferror(fp))
1228		ret = EOF;
1229	if ((argtable != NULL) && (argtable != statargtable))
1230		free (argtable);
1231	return (ret);
1232	/* NOTREACHED */
1233}
1234
1235/*
1236 * Find all arguments when a positional parameter is encountered.  Returns a
1237 * table, indexed by argument number, of pointers to each arguments.  The
1238 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
1239 * It will be replaces with a malloc-ed one if it overflows.
1240 */
1241static void
1242__find_arguments (const char *fmt0, va_list ap, union arg **argtable)
1243{
1244	char *fmt;		/* format string */
1245	int ch;			/* character from fmt */
1246	int n, n2;		/* handy integer (short term usage) */
1247	char *cp;		/* handy char pointer (short term usage) */
1248	int flags;		/* flags as above */
1249	int width;		/* width from format (%8d), or 0 */
1250	enum typeid *typetable; /* table of types */
1251	enum typeid stattypetable [STATIC_ARG_TBL_SIZE];
1252	int tablesize;		/* current size of type table */
1253	int tablemax;		/* largest used index in table */
1254	int nextarg;		/* 1-based argument index */
1255
1256	/*
1257	 * Add an argument type to the table, expanding if necessary.
1258	 */
1259#define ADDTYPE(type) \
1260	((nextarg >= tablesize) ? \
1261		__grow_type_table(nextarg, &typetable, &tablesize) : 0, \
1262	(nextarg > tablemax) ? tablemax = nextarg : 0, \
1263	typetable[nextarg++] = type)
1264
1265#define	ADDSARG() \
1266	((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \
1267		((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1268		((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1269		((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
1270		((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT))))))
1271
1272#define	ADDUARG() \
1273	((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \
1274		((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1275		((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1276		((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
1277		((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT))))))
1278
1279	/*
1280	 * Add * arguments to the type array.
1281	 */
1282#define ADDASTER() \
1283	n2 = 0; \
1284	cp = fmt; \
1285	while (is_digit(*cp)) { \
1286		n2 = 10 * n2 + to_digit(*cp); \
1287		cp++; \
1288	} \
1289	if (*cp == '$') { \
1290		int hold = nextarg; \
1291		nextarg = n2; \
1292		ADDTYPE (T_INT); \
1293		nextarg = hold; \
1294		fmt = ++cp; \
1295	} else { \
1296		ADDTYPE (T_INT); \
1297	}
1298	fmt = (char *)fmt0;
1299	typetable = stattypetable;
1300	tablesize = STATIC_ARG_TBL_SIZE;
1301	tablemax = 0;
1302	nextarg = 1;
1303	memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
1304
1305	/*
1306	 * Scan the format for conversions (`%' character).
1307	 */
1308	for (;;) {
1309		for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
1310			/* void */;
1311		if (ch == '\0')
1312			goto done;
1313		fmt++;		/* skip over '%' */
1314
1315		flags = 0;
1316		width = 0;
1317
1318rflag:		ch = *fmt++;
1319reswitch:	switch (ch) {
1320		case ' ':
1321		case '#':
1322			goto rflag;
1323		case '*':
1324			ADDASTER ();
1325			goto rflag;
1326		case '-':
1327		case '+':
1328		case '\'':
1329			goto rflag;
1330		case '.':
1331			if ((ch = *fmt++) == '*') {
1332				ADDASTER ();
1333				goto rflag;
1334			}
1335			while (is_digit(ch)) {
1336				ch = *fmt++;
1337			}
1338			goto reswitch;
1339		case '0':
1340			goto rflag;
1341		case '1': case '2': case '3': case '4':
1342		case '5': case '6': case '7': case '8': case '9':
1343			n = 0;
1344			do {
1345				n = 10 * n + to_digit(ch);
1346				ch = *fmt++;
1347			} while (is_digit(ch));
1348			if (ch == '$') {
1349				nextarg = n;
1350				goto rflag;
1351			}
1352			width = n;
1353			goto reswitch;
1354#ifdef FLOATING_POINT
1355		case 'L':
1356			flags |= LONGDBL;
1357			goto rflag;
1358#endif
1359		case 'h':
1360			if (flags & SHORTINT) {
1361				flags &= ~SHORTINT;
1362				flags |= CHARINT;
1363			} else
1364				flags |= SHORTINT;
1365			goto rflag;
1366		case 'j':
1367			flags |= INTMAXT;
1368			goto rflag;
1369		case 'l':
1370			if (flags & LONGINT) {
1371				flags &= ~LONGINT;
1372				flags |= LLONGINT;
1373			} else
1374				flags |= LONGINT;
1375			goto rflag;
1376		case 'q':
1377			flags |= LLONGINT;	/* not necessarily */
1378			goto rflag;
1379		case 't':
1380			flags |= PTRDIFFT;
1381			goto rflag;
1382		case 'z':
1383			flags |= SIZET;
1384			goto rflag;
1385		case 'C':
1386			flags |= LONGINT;
1387			/*FALLTHROUGH*/
1388		case 'c':
1389			if (flags & LONGINT)
1390				ADDTYPE(T_WINT);
1391			else
1392				ADDTYPE(T_INT);
1393			break;
1394		case 'D':
1395			flags |= LONGINT;
1396			/*FALLTHROUGH*/
1397		case 'd':
1398		case 'i':
1399			ADDSARG();
1400			break;
1401#ifdef FLOATING_POINT
1402#ifdef HEXFLOAT
1403		case 'a':
1404		case 'A':
1405#endif
1406		case 'e':
1407		case 'E':
1408		case 'f':
1409		case 'g':
1410		case 'G':
1411			if (flags & LONGDBL)
1412				ADDTYPE(T_LONG_DOUBLE);
1413			else
1414				ADDTYPE(T_DOUBLE);
1415			break;
1416#endif /* FLOATING_POINT */
1417		case 'n':
1418			if (flags & INTMAXT)
1419				ADDTYPE(TP_INTMAXT);
1420			else if (flags & PTRDIFFT)
1421				ADDTYPE(TP_PTRDIFFT);
1422			else if (flags & SIZET)
1423				ADDTYPE(TP_SIZET);
1424			else if (flags & LLONGINT)
1425				ADDTYPE(TP_LLONG);
1426			else if (flags & LONGINT)
1427				ADDTYPE(TP_LONG);
1428			else if (flags & SHORTINT)
1429				ADDTYPE(TP_SHORT);
1430			else if (flags & CHARINT)
1431				ADDTYPE(TP_SCHAR);
1432			else
1433				ADDTYPE(TP_INT);
1434			continue;	/* no output */
1435		case 'O':
1436			flags |= LONGINT;
1437			/*FALLTHROUGH*/
1438		case 'o':
1439			ADDUARG();
1440			break;
1441		case 'p':
1442			ADDTYPE(TP_VOID);
1443			break;
1444		case 'S':
1445			flags |= LONGINT;
1446			/*FALLTHROUGH*/
1447		case 's':
1448			if (flags & LONGINT)
1449				ADDTYPE(TP_WCHAR);
1450			else
1451				ADDTYPE(TP_CHAR);
1452			break;
1453		case 'U':
1454			flags |= LONGINT;
1455			/*FALLTHROUGH*/
1456		case 'u':
1457		case 'X':
1458		case 'x':
1459			ADDUARG();
1460			break;
1461		default:	/* "%?" prints ?, unless ? is NUL */
1462			if (ch == '\0')
1463				goto done;
1464			break;
1465		}
1466	}
1467done:
1468	/*
1469	 * Build the argument table.
1470	 */
1471	if (tablemax >= STATIC_ARG_TBL_SIZE) {
1472		*argtable = (union arg *)
1473		    malloc (sizeof (union arg) * (tablemax + 1));
1474	}
1475
1476	(*argtable) [0].intarg = 0;
1477	for (n = 1; n <= tablemax; n++) {
1478		switch (typetable [n]) {
1479		    case T_UNUSED: /* whoops! */
1480			(*argtable) [n].intarg = va_arg (ap, int);
1481			break;
1482		    case TP_SCHAR:
1483			(*argtable) [n].pschararg = va_arg (ap, signed char *);
1484			break;
1485		    case TP_SHORT:
1486			(*argtable) [n].pshortarg = va_arg (ap, short *);
1487			break;
1488		    case T_INT:
1489			(*argtable) [n].intarg = va_arg (ap, int);
1490			break;
1491		    case T_U_INT:
1492			(*argtable) [n].uintarg = va_arg (ap, unsigned int);
1493			break;
1494		    case TP_INT:
1495			(*argtable) [n].pintarg = va_arg (ap, int *);
1496			break;
1497		    case T_LONG:
1498			(*argtable) [n].longarg = va_arg (ap, long);
1499			break;
1500		    case T_U_LONG:
1501			(*argtable) [n].ulongarg = va_arg (ap, unsigned long);
1502			break;
1503		    case TP_LONG:
1504			(*argtable) [n].plongarg = va_arg (ap, long *);
1505			break;
1506		    case T_LLONG:
1507			(*argtable) [n].longlongarg = va_arg (ap, long long);
1508			break;
1509		    case T_U_LLONG:
1510			(*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long);
1511			break;
1512		    case TP_LLONG:
1513			(*argtable) [n].plonglongarg = va_arg (ap, long long *);
1514			break;
1515		    case T_PTRDIFFT:
1516			(*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t);
1517			break;
1518		    case TP_PTRDIFFT:
1519			(*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *);
1520			break;
1521		    case T_SIZET:
1522			(*argtable) [n].sizearg = va_arg (ap, size_t);
1523			break;
1524		    case TP_SIZET:
1525			(*argtable) [n].psizearg = va_arg (ap, ssize_t *);
1526			break;
1527		    case T_INTMAXT:
1528			(*argtable) [n].intmaxarg = va_arg (ap, intmax_t);
1529			break;
1530		    case T_UINTMAXT:
1531			(*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t);
1532			break;
1533		    case TP_INTMAXT:
1534			(*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *);
1535			break;
1536#ifdef FLOATING_POINT
1537		    case T_DOUBLE:
1538			(*argtable) [n].doublearg = va_arg (ap, double);
1539			break;
1540		    case T_LONG_DOUBLE:
1541			(*argtable) [n].longdoublearg = va_arg (ap, long double);
1542			break;
1543#endif
1544		    case TP_CHAR:
1545			(*argtable) [n].pchararg = va_arg (ap, char *);
1546			break;
1547		    case TP_VOID:
1548			(*argtable) [n].pvoidarg = va_arg (ap, void *);
1549			break;
1550		    case T_WINT:
1551			(*argtable) [n].wintarg = va_arg (ap, wint_t);
1552			break;
1553		    case TP_WCHAR:
1554			(*argtable) [n].pwchararg = va_arg (ap, wchar_t *);
1555			break;
1556		}
1557	}
1558
1559	if ((typetable != NULL) && (typetable != stattypetable))
1560		free (typetable);
1561}
1562
1563/*
1564 * Increase the size of the type table.
1565 */
1566static void
1567__grow_type_table (int nextarg, enum typeid **typetable, int *tablesize)
1568{
1569	enum typeid *const oldtable = *typetable;
1570	const int oldsize = *tablesize;
1571	enum typeid *newtable;
1572	int newsize = oldsize * 2;
1573
1574	if (newsize < nextarg + 1)
1575		newsize = nextarg + 1;
1576	if (oldsize == STATIC_ARG_TBL_SIZE) {
1577		if ((newtable = malloc(newsize)) == NULL)
1578			abort();			/* XXX handle better */
1579		bcopy(oldtable, newtable, oldsize);
1580	} else {
1581		if ((newtable = reallocf(oldtable, newsize)) == NULL)
1582			abort();			/* XXX handle better */
1583	}
1584	memset(&newtable[oldsize], T_UNUSED, newsize - oldsize);
1585
1586	*typetable = newtable;
1587	*tablesize = newsize;
1588}
1589
1590
1591#ifdef FLOATING_POINT
1592
1593static int
1594exponent(char *p0, int exp, int fmtch)
1595{
1596	char *p, *t;
1597	char expbuf[MAXEXPDIG];
1598
1599	p = p0;
1600	*p++ = fmtch;
1601	if (exp < 0) {
1602		exp = -exp;
1603		*p++ = '-';
1604	}
1605	else
1606		*p++ = '+';
1607	t = expbuf + MAXEXPDIG;
1608	if (exp > 9) {
1609		do {
1610			*--t = to_char(exp % 10);
1611		} while ((exp /= 10) > 9);
1612		*--t = to_char(exp);
1613		for (; t < expbuf + MAXEXPDIG; *p++ = *t++);
1614	}
1615	else {
1616		/*
1617		 * Exponents for decimal floating point conversions
1618		 * (%[eEgG]) must be at least two characters long,
1619		 * whereas exponents for hexadecimal conversions can
1620		 * be only one character long.
1621		 */
1622		if (fmtch == 'e' || fmtch == 'E')
1623			*p++ = '0';
1624		*p++ = to_char(exp);
1625	}
1626	return (p - p0);
1627}
1628#endif /* FLOATING_POINT */
1629