vfwprintf.c revision 103739 
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#include <sys/cdefs.h>
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__FBSDID("FreeBSD: src/lib/libc/stdio/vfprintf.c,v 1.45 2002/09/06 11:23:55 tjr Exp ");
43#endif
44__FBSDID("$FreeBSD: head/lib/libc/stdio/vfwprintf.c 103739 2002-09-21 13:00:30Z tjr $");
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 <limits.h>
58#include <locale.h>
59#include <stdarg.h>
60#include <stddef.h>
61#include <stdint.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <wchar.h>
66#include <wctype.h>
67#include "un-namespace.h"
68
69#include "libc_private.h"
70#include "local.h"
71#include "fvwrite.h"
72
73/* Define FLOATING_POINT to get floating point. */
74#define	FLOATING_POINT
75
76union arg {
77	int	intarg;
78	u_int	uintarg;
79	long	longarg;
80	u_long	ulongarg;
81	long long longlongarg;
82	unsigned long long ulonglongarg;
83	ptrdiff_t ptrdiffarg;
84	size_t	sizearg;
85	intmax_t intmaxarg;
86	uintmax_t uintmaxarg;
87	void	*pvoidarg;
88	char	*pchararg;
89	signed char *pschararg;
90	short	*pshortarg;
91	int	*pintarg;
92	long	*plongarg;
93	long long *plonglongarg;
94	ptrdiff_t *pptrdiffarg;
95	size_t	*psizearg;
96	intmax_t *pintmaxarg;
97#ifdef FLOATING_POINT
98	double	doublearg;
99	long double longdoublearg;
100#endif
101	wint_t	wintarg;
102	wchar_t	*pwchararg;
103};
104
105/*
106 * Type ids for argument type table.
107 */
108enum typeid {
109	T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
110	T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
111	T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET,
112	T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
113	T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR
114};
115
116static int	__sbprintf(FILE *, const wchar_t *, va_list);
117static wchar_t	*__ujtoa(uintmax_t, wchar_t *, int, int, wchar_t *, int, char,
118		    const char *);
119static wchar_t	*__ultoa(u_long, wchar_t *, int, int, wchar_t *, int, char,
120		    const char *);
121static wchar_t	*__mbsconv(char *, int);
122static void	__find_arguments(const wchar_t *, va_list, union arg **);
123static void	__grow_type_table(int, enum typeid **, int *);
124
125/*
126 * Helper function for `fprintf to unbuffered unix file': creates a
127 * temporary buffer.  We only work on write-only files; this avoids
128 * worries about ungetc buffers and so forth.
129 */
130static int
131__sbprintf(FILE *fp, const wchar_t *fmt, va_list ap)
132{
133	int ret;
134	FILE fake;
135	unsigned char buf[BUFSIZ];
136
137	/* copy the important variables */
138	fake._flags = fp->_flags & ~__SNBF;
139	fake._file = fp->_file;
140	fake._cookie = fp->_cookie;
141	fake._write = fp->_write;
142	fake._extra = fp->_extra;
143
144	/* set up the buffer */
145	fake._bf._base = fake._p = buf;
146	fake._bf._size = fake._w = sizeof(buf);
147	fake._lbfsize = 0;	/* not actually used, but Just In Case */
148
149	/* do the work, then copy any error status */
150	ret = __vfwprintf(&fake, fmt, ap);
151	if (ret >= 0 && __fflush(&fake))
152		ret = WEOF;
153	if (fake._flags & __SERR)
154		fp->_flags |= __SERR;
155	return (ret);
156}
157
158/*
159 * Macros for converting digits to letters and vice versa
160 */
161#define	to_digit(c)	((c) - '0')
162#define is_digit(c)	((unsigned)to_digit(c) <= 9)
163#define	to_char(n)	((n) + '0')
164
165/*
166 * Convert an unsigned long to ASCII for printf purposes, returning
167 * a pointer to the first character of the string representation.
168 * Octal numbers can be forced to have a leading zero; hex numbers
169 * use the given digits.
170 */
171static wchar_t *
172__ultoa(u_long val, wchar_t *endp, int base, int octzero, wchar_t *xdigs,
173	int needgrp, char thousep, const char *grp)
174{
175	wchar_t *cp = endp;
176	long sval;
177	int ndig;
178
179	/*
180	 * Handle the three cases separately, in the hope of getting
181	 * better/faster code.
182	 */
183	switch (base) {
184	case 10:
185		if (val < 10) {	/* many numbers are 1 digit */
186			*--cp = to_char(val);
187			return (cp);
188		}
189		ndig = 0;
190		/*
191		 * On many machines, unsigned arithmetic is harder than
192		 * signed arithmetic, so we do at most one unsigned mod and
193		 * divide; this is sufficient to reduce the range of
194		 * the incoming value to where signed arithmetic works.
195		 */
196		if (val > LONG_MAX) {
197			*--cp = to_char(val % 10);
198			ndig++;
199			sval = val / 10;
200		} else
201			sval = val;
202		do {
203			*--cp = to_char(sval % 10);
204			ndig++;
205			/*
206			 * If (*grp == CHAR_MAX) then no more grouping
207			 * should be performed.
208			 */
209			if (needgrp && ndig == *grp && *grp != CHAR_MAX
210					&& sval > 9) {
211				*--cp = thousep;
212				ndig = 0;
213				/*
214				 * If (*(grp+1) == '\0') then we have to
215				 * use *grp character (last grouping rule)
216				 * for all next cases
217				 */
218				if (*(grp+1) != '\0')
219					grp++;
220			}
221			sval /= 10;
222		} while (sval != 0);
223		break;
224
225	case 8:
226		do {
227			*--cp = to_char(val & 7);
228			val >>= 3;
229		} while (val);
230		if (octzero && *cp != '0')
231			*--cp = '0';
232		break;
233
234	case 16:
235		do {
236			*--cp = xdigs[val & 15];
237			val >>= 4;
238		} while (val);
239		break;
240
241	default:			/* oops */
242		abort();
243	}
244	return (cp);
245}
246
247/* Identical to __ultoa, but for intmax_t. */
248static wchar_t *
249__ujtoa(uintmax_t val, wchar_t *endp, int base, int octzero, wchar_t *xdigs,
250	int needgrp, char thousep, const char *grp)
251{
252	wchar_t *cp = endp;
253	intmax_t sval;
254	int ndig;
255
256	/* quick test for small values; __ultoa is typically much faster */
257	/* (perhaps instead we should run until small, then call __ultoa?) */
258	if (val <= ULONG_MAX)
259		return (__ultoa((u_long)val, endp, base, octzero, xdigs,
260		    needgrp, thousep, grp));
261	switch (base) {
262	case 10:
263		if (val < 10) {
264			*--cp = to_char(val % 10);
265			return (cp);
266		}
267		ndig = 0;
268		if (val > INTMAX_MAX) {
269			*--cp = to_char(val % 10);
270			ndig++;
271			sval = val / 10;
272		} else
273			sval = val;
274		do {
275			*--cp = to_char(sval % 10);
276			ndig++;
277			/*
278			 * If (*grp == CHAR_MAX) then no more grouping
279			 * should be performed.
280			 */
281			if (needgrp && *grp != CHAR_MAX && ndig == *grp
282					&& sval > 9) {
283				*--cp = thousep;
284				ndig = 0;
285				/*
286				 * If (*(grp+1) == '\0') then we have to
287				 * use *grp character (last grouping rule)
288				 * for all next cases
289				 */
290				if (*(grp+1) != '\0')
291					grp++;
292			}
293			sval /= 10;
294		} while (sval != 0);
295		break;
296
297	case 8:
298		do {
299			*--cp = to_char(val & 7);
300			val >>= 3;
301		} while (val);
302		if (octzero && *cp != '0')
303			*--cp = '0';
304		break;
305
306	case 16:
307		do {
308			*--cp = xdigs[val & 15];
309			val >>= 4;
310		} while (val);
311		break;
312
313	default:
314		abort();
315	}
316	return (cp);
317}
318
319/*
320 * Convert a multibyte character string argument for the %s format to a wide
321 * string representation. ``prec'' specifies the maximum number of bytes
322 * to output. If ``prec'' is greater than or equal to zero, we can't assume
323 * that the multibyte char. string ends in a null character.
324 */
325static wchar_t *
326__mbsconv(char *mbsarg, int prec)
327{
328	wchar_t *convbuf, *wcp;
329	const char *p;
330	size_t insize, nchars, nconv;
331	mbstate_t mbs;
332
333	/*
334	 * Supplied argument is a multibyte string; convert it to wide
335	 * characters first.
336	 */
337	if (prec >= 0) {
338		/*
339		 * String is not guaranteed to be NUL-terminated. Find the
340		 * number of characters to print.
341		 */
342		memset(&mbs, 0, sizeof(mbs));
343		p = mbsarg;
344		insize = nchars = 0;
345		while (nchars != (size_t)prec) {
346			nconv = mbrlen(p, MB_CUR_MAX, &mbs);
347			if (nconv == 0 || nconv == (size_t)-1 ||
348			    nconv == (size_t)-2)
349				break;
350			p += nconv;
351			nchars++;
352			insize += nconv;
353		}
354		if (nconv == (size_t)-1 || nconv == (size_t)-2)
355			return (NULL);
356	} else
357		insize = strlen(mbsarg);
358
359	/*
360	 * Allocate buffer for the result and perform the conversion,
361	 * converting at most `size' bytes of the input multibyte string to
362	 * wide characters for printing.
363	 */
364	convbuf = malloc((insize + 1) * sizeof(*convbuf));
365	if (convbuf == NULL)
366		return (NULL);
367	wcp = convbuf;
368	p = mbsarg;
369	memset(&mbs, 0, sizeof(mbs));
370	while (insize != 0) {
371		nconv = mbrtowc(wcp, p, insize, &mbs);
372		if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
373			break;
374		wcp++;
375		p += nconv;
376		insize -= nconv;
377	}
378	if (nconv == (size_t)-1 || nconv == (size_t)-2) {
379		free(convbuf);
380		return (NULL);
381	}
382	*wcp = L'\0';
383
384	return (convbuf);
385}
386
387/*
388 * MT-safe version
389 */
390int
391vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
392
393{
394	int ret;
395
396	FLOCKFILE(fp);
397	ret = __vfwprintf(fp, fmt0, ap);
398	FUNLOCKFILE(fp);
399	return (ret);
400}
401
402#ifdef FLOATING_POINT
403#include <math.h>
404#include "floatio.h"
405
406#define	BUF		((MAXEXP*2)+MAXFRACT+1)		/* + decimal point */
407#define	DEFPREC		6
408
409static wchar_t *cvt(double, int, int, char *, int *, wchar_t, int *,
410	    wchar_t **);
411static int exponent(wchar_t *, int, wchar_t);
412
413#else /* no FLOATING_POINT */
414
415#define	BUF		136
416
417#endif /* FLOATING_POINT */
418
419#define STATIC_ARG_TBL_SIZE 8           /* Size of static argument table. */
420
421/*
422 * Flags used during conversion.
423 */
424#define	ALT		0x001		/* alternate form */
425#define	HEXPREFIX	0x002		/* add 0x or 0X prefix */
426#define	LADJUST		0x004		/* left adjustment */
427#define	LONGDBL		0x008		/* long double */
428#define	LONGINT		0x010		/* long integer */
429#define	LLONGINT	0x020		/* long long integer */
430#define	SHORTINT	0x040		/* short integer */
431#define	ZEROPAD		0x080		/* zero (as opposed to blank) pad */
432#define	FPT		0x100		/* Floating point number */
433#define	GROUPING	0x200		/* use grouping ("'" flag) */
434					/* C99 additional size modifiers: */
435#define	SIZET		0x400		/* size_t */
436#define	PTRDIFFT	0x800		/* ptrdiff_t */
437#define	INTMAXT		0x1000		/* intmax_t */
438#define	CHARINT		0x2000		/* print char using int format */
439
440/*
441 * Non-MT-safe version
442 */
443int
444__vfwprintf(FILE *fp, const wchar_t *fmt0, va_list ap)
445{
446	wchar_t *fmt;		/* format string */
447	wchar_t ch;		/* character from fmt */
448	int n, n2;		/* handy integer (short term usage) */
449	wchar_t *cp;		/* handy char pointer (short term usage) */
450	int flags;		/* flags as above */
451	int ret;		/* return value accumulator */
452	int width;		/* width from format (%8d), or 0 */
453	int prec;		/* precision from format (%.3d), or -1 */
454	wchar_t sign;		/* sign prefix (' ', '+', '-', or \0) */
455	char thousands_sep;	/* locale specific thousands separator */
456	const char *grouping;	/* locale specific numeric grouping rules */
457#ifdef FLOATING_POINT
458	char *decimal_point;	/* locale specific decimal point */
459	char softsign;		/* temporary negative sign for floats */
460	double _double;		/* double precision arguments %[eEfgG] */
461	int expt;		/* integer value of exponent */
462	int expsize;		/* character count for expstr */
463	int ndig;		/* actual number of digits returned by cvt */
464	wchar_t expstr[7];	/* buffer for exponent string */
465	wchar_t *dtoaresult;	/* buffer allocated by dtoa */
466#endif
467	u_long	ulval;		/* integer arguments %[diouxX] */
468	uintmax_t ujval;	/* %j, %ll, %q, %t, %z integers */
469	int base;		/* base for [diouxX] conversion */
470	int dprec;		/* a copy of prec if [diouxX], 0 otherwise */
471	int realsz;		/* field size expanded by dprec, sign, etc */
472	int size;		/* size of converted field or string */
473	int prsize;             /* max size of printed field */
474	wchar_t *xdigs;		/* digits for [xX] conversion */
475	wchar_t buf[BUF];	/* space for %c, %[diouxX], %[eEfFgG] */
476	wchar_t ox[2];		/* space for 0x hex-prefix */
477	union arg *argtable;	/* args, built due to positional arg */
478	union arg statargtable [STATIC_ARG_TBL_SIZE];
479	int nextarg;		/* 1-based argument index */
480	va_list orgap;		/* original argument pointer */
481	wchar_t *convbuf;	/* multibyte to wide conversion result */
482
483	/*
484	 * Choose PADSIZE to trade efficiency vs. size.  If larger printf
485	 * fields occur frequently, increase PADSIZE and make the initialisers
486	 * below longer.
487	 */
488#define	PADSIZE	16		/* pad chunk size */
489	static wchar_t blanks[PADSIZE] =
490	 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
491	static wchar_t zeroes[PADSIZE] =
492	 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
493
494	/*
495	 * BEWARE, these `goto error' on error, PRINT uses `n2' and
496	 * PAD uses `n'.
497	 */
498#define	PRINT(ptr, len)	do {			\
499	for (n2 = 0; n2 < (len); n2++)		\
500		__fputwc((ptr)[n2], fp);	\
501} while (0)
502#define	PAD(howmany, with)	do {		\
503	if ((n = (howmany)) > 0) {		\
504		while (n > PADSIZE) {		\
505			PRINT(with, PADSIZE);	\
506			n -= PADSIZE;		\
507		}				\
508		PRINT(with, n);			\
509	}					\
510} while (0)
511
512	/*
513	 * Get the argument indexed by nextarg.   If the argument table is
514	 * built, use it to get the argument.  If its not, get the next
515	 * argument (and arguments must be gotten sequentially).
516	 */
517#define GETARG(type) \
518	((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
519	    (nextarg++, va_arg(ap, type)))
520
521	/*
522	 * To extend shorts properly, we need both signed and unsigned
523	 * argument extraction methods.
524	 */
525#define	SARG() \
526	(flags&LONGINT ? GETARG(long) : \
527	    flags&SHORTINT ? (long)(short)GETARG(int) : \
528	    flags&CHARINT ? (long)(signed char)GETARG(int) : \
529	    (long)GETARG(int))
530#define	UARG() \
531	(flags&LONGINT ? GETARG(u_long) : \
532	    flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
533	    flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
534	    (u_long)GETARG(u_int))
535#define	INTMAX_SIZE	(INTMAXT|SIZET|PTRDIFFT|LLONGINT)
536#define SJARG() \
537	(flags&INTMAXT ? GETARG(intmax_t) : \
538	    flags&SIZET ? (intmax_t)GETARG(size_t) : \
539	    flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
540	    (intmax_t)GETARG(long long))
541#define	UJARG() \
542	(flags&INTMAXT ? GETARG(uintmax_t) : \
543	    flags&SIZET ? (uintmax_t)GETARG(size_t) : \
544	    flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
545	    (uintmax_t)GETARG(unsigned long long))
546
547	/*
548	 * Get * arguments, including the form *nn$.  Preserve the nextarg
549	 * that the argument can be gotten once the type is determined.
550	 */
551#define GETASTER(val) \
552	n2 = 0; \
553	cp = fmt; \
554	while (is_digit(*cp)) { \
555		n2 = 10 * n2 + to_digit(*cp); \
556		cp++; \
557	} \
558	if (*cp == '$') { \
559		int hold = nextarg; \
560		if (argtable == NULL) { \
561			argtable = statargtable; \
562			__find_arguments (fmt0, orgap, &argtable); \
563		} \
564		nextarg = n2; \
565		val = GETARG (int); \
566		nextarg = hold; \
567		fmt = ++cp; \
568	} else { \
569		val = GETARG (int); \
570	}
571
572
573	thousands_sep = '\0';
574	grouping = NULL;
575#ifdef FLOATING_POINT
576	dtoaresult = NULL;
577	decimal_point = localeconv()->decimal_point;
578#endif
579	convbuf = NULL;
580	/* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
581	if (cantwrite(fp))
582		return (EOF);
583
584	/* optimise fprintf(stderr) (and other unbuffered Unix files) */
585	if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
586	    fp->_file >= 0)
587		return (__sbprintf(fp, fmt0, ap));
588
589	fmt = (wchar_t *)fmt0;
590	argtable = NULL;
591	nextarg = 1;
592	orgap = ap;
593	ret = 0;
594
595	/*
596	 * Scan the format for conversions (`%' character).
597	 */
598	for (;;) {
599		for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
600			/* void */;
601		if ((n = fmt - cp) != 0) {
602			if ((unsigned)ret + n > INT_MAX) {
603				ret = EOF;
604				goto error;
605			}
606			PRINT(cp, n);
607			ret += n;
608		}
609		if (ch == '\0')
610			goto done;
611		fmt++;		/* skip over '%' */
612
613		flags = 0;
614		dprec = 0;
615		width = 0;
616		prec = -1;
617		sign = '\0';
618
619rflag:		ch = *fmt++;
620reswitch:	switch (ch) {
621		case ' ':
622			/*-
623			 * ``If the space and + flags both appear, the space
624			 * flag will be ignored.''
625			 *	-- ANSI X3J11
626			 */
627			if (!sign)
628				sign = ' ';
629			goto rflag;
630		case '#':
631			flags |= ALT;
632			goto rflag;
633		case '*':
634			/*-
635			 * ``A negative field width argument is taken as a
636			 * - flag followed by a positive field width.''
637			 *	-- ANSI X3J11
638			 * They don't exclude field widths read from args.
639			 */
640			GETASTER (width);
641			if (width >= 0)
642				goto rflag;
643			width = -width;
644			/* FALLTHROUGH */
645		case '-':
646			flags |= LADJUST;
647			goto rflag;
648		case '+':
649			sign = '+';
650			goto rflag;
651		case '\'':
652			flags |= GROUPING;
653			thousands_sep = *(localeconv()->thousands_sep);
654			grouping = localeconv()->grouping;
655			goto rflag;
656		case '.':
657			if ((ch = *fmt++) == '*') {
658				GETASTER (n);
659				prec = n < 0 ? -1 : n;
660				goto rflag;
661			}
662			n = 0;
663			while (is_digit(ch)) {
664				n = 10 * n + to_digit(ch);
665				ch = *fmt++;
666			}
667			prec = n < 0 ? -1 : n;
668			goto reswitch;
669		case '0':
670			/*-
671			 * ``Note that 0 is taken as a flag, not as the
672			 * beginning of a field width.''
673			 *	-- ANSI X3J11
674			 */
675			flags |= ZEROPAD;
676			goto rflag;
677		case '1': case '2': case '3': case '4':
678		case '5': case '6': case '7': case '8': case '9':
679			n = 0;
680			do {
681				n = 10 * n + to_digit(ch);
682				ch = *fmt++;
683			} while (is_digit(ch));
684			if (ch == '$') {
685				nextarg = n;
686				if (argtable == NULL) {
687					argtable = statargtable;
688					__find_arguments (fmt0, orgap,
689					    &argtable);
690				}
691				goto rflag;
692			}
693			width = n;
694			goto reswitch;
695#ifdef FLOATING_POINT
696		case 'L':
697			flags |= LONGDBL;
698			goto rflag;
699#endif
700		case 'h':
701			if (flags & SHORTINT) {
702				flags &= ~SHORTINT;
703				flags |= CHARINT;
704			} else
705				flags |= SHORTINT;
706			goto rflag;
707		case 'j':
708			flags |= INTMAXT;
709			goto rflag;
710		case 'l':
711			if (flags & LONGINT) {
712				flags &= ~LONGINT;
713				flags |= LLONGINT;
714			} else
715				flags |= LONGINT;
716			goto rflag;
717		case 'q':
718			flags |= LLONGINT;	/* not necessarily */
719			goto rflag;
720		case 't':
721			flags |= PTRDIFFT;
722			goto rflag;
723		case 'z':
724			flags |= SIZET;
725			goto rflag;
726		case 'c':
727			if (flags & LONGINT)
728				*(cp = buf) = (wchar_t)GETARG(wint_t);
729			else
730				*(cp = buf) = (wchar_t)btowc(GETARG(int));
731			size = 1;
732			sign = '\0';
733			break;
734		case 'D':
735			flags |= LONGINT;
736			/*FALLTHROUGH*/
737		case 'd':
738		case 'i':
739			if (flags & INTMAX_SIZE) {
740				ujval = SJARG();
741				if ((intmax_t)ujval < 0) {
742					ujval = -ujval;
743					sign = '-';
744				}
745			} else {
746				ulval = SARG();
747				if ((long)ulval < 0) {
748					ulval = -ulval;
749					sign = '-';
750				}
751			}
752			base = 10;
753			goto number;
754#ifdef FLOATING_POINT
755#ifdef HEXFLOAT
756		case 'a':
757		case 'A':
758#endif
759		case 'e':
760		case 'E':
761			/*-
762			 * Grouping apply to %i, %d, %u, %f, %F, %g, %G
763			 * conversion specifiers only. For other conversions
764			 * behavior is undefined.
765			 *	-- POSIX
766			 */
767			flags &= ~GROUPING;
768			/*FALLTHROUGH*/
769		case 'f':
770		case 'F':
771			goto fp_begin;
772		case 'g':
773		case 'G':
774			if (prec == 0)
775				prec = 1;
776fp_begin:		if (prec == -1)
777				prec = DEFPREC;
778			if (flags & LONGDBL)
779				/* XXX this loses precision. */
780				_double = (double)GETARG(long double);
781			else
782				_double = GETARG(double);
783			/* do this before tricky precision changes */
784			if (isinf(_double)) {
785				if (_double < 0)
786					sign = '-';
787				if (iswupper(ch))
788					cp = L"INF";
789				else
790					cp = L"inf";
791				size = 3;
792				break;
793			}
794			if (isnan(_double)) {
795				if (iswupper(ch))
796					cp = L"NAN";
797				else
798					cp = L"nan";
799				size = 3;
800				break;
801			}
802			flags |= FPT;
803			if (dtoaresult != NULL) {
804				free(dtoaresult);
805				dtoaresult = NULL;
806			}
807			cp = cvt(_double, prec, flags, &softsign,
808				&expt, ch, &ndig, &dtoaresult);
809			if (ch == 'g' || ch == 'G') {
810				if (expt <= -4 || expt > prec)
811					ch = (ch == 'g') ? 'e' : 'E';
812				else
813					ch = 'g';
814			}
815			if (ch == 'e' || ch == 'E') {
816				--expt;
817				expsize = exponent(expstr, expt, ch);
818				size = expsize + ndig;
819				if (ndig > 1 || flags & ALT)
820					++size;
821			} else if (ch == 'f' || ch == 'F') {
822				if (expt > 0) {
823					size = expt;
824					if (prec || flags & ALT)
825						size += prec + 1;
826				} else	/* "0.X" */
827					size = prec + 2;
828			} else if (expt >= ndig) {	/* fixed g fmt */
829				size = expt;
830				if (flags & ALT)
831					++size;
832			} else
833				size = ndig + (expt > 0 ?
834					1 : 2 - expt);
835
836			if (softsign)
837				sign = '-';
838			break;
839#endif /* FLOATING_POINT */
840		case 'n':
841			/*
842			 * Assignment-like behavior is specified if the
843			 * value overflows or is otherwise unrepresentable.
844			 * C99 says to use `signed char' for %hhn conversions.
845			 */
846			if (flags & LLONGINT)
847				*GETARG(long long *) = ret;
848			else if (flags & SIZET)
849				*GETARG(ssize_t *) = (ssize_t)ret;
850			else if (flags & PTRDIFFT)
851				*GETARG(ptrdiff_t *) = ret;
852			else if (flags & INTMAXT)
853				*GETARG(intmax_t *) = ret;
854			else if (flags & LONGINT)
855				*GETARG(long *) = ret;
856			else if (flags & SHORTINT)
857				*GETARG(short *) = ret;
858			else if (flags & CHARINT)
859				*GETARG(signed char *) = ret;
860			else
861				*GETARG(int *) = ret;
862			continue;	/* no output */
863		case 'O':
864			flags |= LONGINT;
865			/*FALLTHROUGH*/
866		case 'o':
867			if (flags & INTMAX_SIZE)
868				ujval = UJARG();
869			else
870				ulval = UARG();
871			base = 8;
872			goto nosign;
873		case 'p':
874			/*-
875			 * ``The argument shall be a pointer to void.  The
876			 * value of the pointer is converted to a sequence
877			 * of printable characters, in an implementation-
878			 * defined manner.''
879			 *	-- ANSI X3J11
880			 */
881			ujval = (uintmax_t)(uintptr_t)GETARG(void *);
882			base = 16;
883			xdigs = L"0123456789abcdef";
884			flags = flags | INTMAXT | HEXPREFIX;
885			ch = 'x';
886			goto nosign;
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						goto error;
902					cp = convbuf;
903				}
904			}
905
906			if (prec >= 0) {
907				/*
908				 * can't use wcslen; can only look for the
909				 * NUL in the first `prec' characters, and
910				 * wcslen() will go further.
911				 */
912				wchar_t *p = wmemchr(cp, 0, (size_t)prec);
913
914				if (p != NULL) {
915					size = p - cp;
916					if (size > prec)
917						size = prec;
918				} else
919					size = prec;
920			} else
921				size = wcslen(cp);
922			sign = '\0';
923			break;
924		case 'U':
925			flags |= LONGINT;
926			/*FALLTHROUGH*/
927		case 'u':
928			if (flags & INTMAX_SIZE)
929				ujval = UJARG();
930			else
931				ulval = UARG();
932			base = 10;
933			goto nosign;
934		case 'X':
935			xdigs = L"0123456789ABCDEF";
936			goto hex;
937		case 'x':
938			xdigs = L"0123456789abcdef";
939hex:
940			if (flags & INTMAX_SIZE)
941				ujval = UJARG();
942			else
943				ulval = UARG();
944			base = 16;
945			/* leading 0x/X only if non-zero */
946			if (flags & ALT &&
947			    (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
948				flags |= HEXPREFIX;
949
950			flags &= ~GROUPING;
951			/* unsigned conversions */
952nosign:			sign = '\0';
953			/*-
954			 * ``... diouXx conversions ... if a precision is
955			 * specified, the 0 flag will be ignored.''
956			 *	-- ANSI X3J11
957			 */
958number:			if ((dprec = prec) >= 0)
959				flags &= ~ZEROPAD;
960
961			/*-
962			 * ``The result of converting a zero value with an
963			 * explicit precision of zero is no characters.''
964			 *	-- ANSI X3J11
965			 */
966			cp = buf + BUF;
967			if (flags & INTMAX_SIZE) {
968				if (ujval != 0 || prec != 0)
969					cp = __ujtoa(ujval, cp, base,
970					    flags & ALT, xdigs,
971					    flags & GROUPING, thousands_sep,
972					    grouping);
973			} else {
974				if (ulval != 0 || prec != 0)
975					cp = __ultoa(ulval, cp, base,
976					    flags & ALT, xdigs,
977					    flags & GROUPING, thousands_sep,
978					    grouping);
979			}
980			size = buf + BUF - cp;
981			break;
982		default:	/* "%?" prints ?, unless ? is NUL */
983			if (ch == '\0')
984				goto done;
985			/* pretend it was %c with argument ch */
986			cp = buf;
987			*cp = ch;
988			size = 1;
989			sign = '\0';
990			break;
991		}
992
993		/*
994		 * All reasonable formats wind up here.  At this point, `cp'
995		 * points to a string which (if not flags&LADJUST) should be
996		 * padded out to `width' places.  If flags&ZEROPAD, it should
997		 * first be prefixed by any sign or other prefix; otherwise,
998		 * it should be blank padded before the prefix is emitted.
999		 * After any left-hand padding and prefixing, emit zeroes
1000		 * required by a decimal [diouxX] precision, then print the
1001		 * string proper, then emit zeroes required by any leftover
1002		 * floating precision; finally, if LADJUST, pad with blanks.
1003		 *
1004		 * Compute actual size, so we know how much to pad.
1005		 * size excludes decimal prec; realsz includes it.
1006		 */
1007		realsz = dprec > size ? dprec : size;
1008		if (sign)
1009			realsz++;
1010		else if (flags & HEXPREFIX)
1011			realsz += 2;
1012
1013		prsize = width > realsz ? width : realsz;
1014		if ((unsigned)ret + prsize > INT_MAX) {
1015			ret = EOF;
1016			goto error;
1017		}
1018
1019		/* right-adjusting blank padding */
1020		if ((flags & (LADJUST|ZEROPAD)) == 0)
1021			PAD(width - realsz, blanks);
1022
1023		/* prefix */
1024		if (sign) {
1025			PRINT(&sign, 1);
1026		} else if (flags & HEXPREFIX) {
1027			ox[0] = '0';
1028			ox[1] = ch;
1029			PRINT(ox, 2);
1030		}
1031
1032		/* right-adjusting zero padding */
1033		if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1034			PAD(width - realsz, zeroes);
1035
1036		/* leading zeroes from decimal precision */
1037		PAD(dprec - size, zeroes);
1038
1039		/* the string or number proper */
1040#ifdef FLOATING_POINT
1041		if ((flags & FPT) == 0) {
1042			PRINT(cp, size);
1043		} else {	/* glue together f_p fragments */
1044			if (ch >= 'f') {	/* 'f' or 'g' */
1045				if (_double == 0) {
1046					/* kludge for __dtoa irregularity */
1047					PRINT(L"0", 1);
1048					if (expt < ndig || (flags & ALT) != 0) {
1049						PRINT(decimal_point, 1);
1050						PAD(ndig - 1, zeroes);
1051					}
1052				} else if (expt <= 0) {
1053					PRINT(L"0", 1);
1054					PRINT(decimal_point, 1);
1055					PAD(-expt, zeroes);
1056					PRINT(cp, ndig);
1057				} else if (expt >= ndig) {
1058					PRINT(cp, ndig);
1059					PAD(expt - ndig, zeroes);
1060					if (flags & ALT)
1061						PRINT(decimal_point, 1);
1062				} else {
1063					PRINT(cp, expt);
1064					cp += expt;
1065					PRINT(decimal_point, 1);
1066					PRINT(cp, ndig-expt);
1067				}
1068			} else {	/* 'e' or 'E' */
1069				if (ndig > 1 || flags & ALT) {
1070					ox[0] = *cp++;
1071					ox[1] = *decimal_point;
1072					PRINT(ox, 2);
1073					if (_double) {
1074						PRINT(cp, ndig-1);
1075					} else	/* 0.[0..] */
1076						/* __dtoa irregularity */
1077						PAD(ndig - 1, zeroes);
1078				} else	/* XeYYY */
1079					PRINT(cp, 1);
1080				PRINT(expstr, expsize);
1081			}
1082		}
1083#else
1084		PRINT(cp, size);
1085#endif
1086		/* left-adjusting padding (always blank) */
1087		if (flags & LADJUST)
1088			PAD(width - realsz, blanks);
1089
1090		/* finally, adjust ret */
1091		ret += prsize;
1092	}
1093done:
1094error:
1095#ifdef FLOATING_POINT
1096	if (dtoaresult != NULL)
1097		free(dtoaresult);
1098#endif
1099	if (convbuf != NULL)
1100		free(convbuf);
1101	if (__sferror(fp))
1102		ret = EOF;
1103	if ((argtable != NULL) && (argtable != statargtable))
1104		free (argtable);
1105	return (ret);
1106	/* NOTREACHED */
1107}
1108
1109/*
1110 * Find all arguments when a positional parameter is encountered.  Returns a
1111 * table, indexed by argument number, of pointers to each arguments.  The
1112 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
1113 * It will be replaces with a malloc-ed one if it overflows.
1114 */
1115static void
1116__find_arguments (const wchar_t *fmt0, va_list ap, union arg **argtable)
1117{
1118	wchar_t *fmt;		/* format string */
1119	wchar_t ch;		/* character from fmt */
1120	int n, n2;		/* handy integer (short term usage) */
1121	wchar_t *cp;		/* handy char pointer (short term usage) */
1122	int flags;		/* flags as above */
1123	int width;		/* width from format (%8d), or 0 */
1124	enum typeid *typetable; /* table of types */
1125	enum typeid stattypetable [STATIC_ARG_TBL_SIZE];
1126	int tablesize;		/* current size of type table */
1127	int tablemax;		/* largest used index in table */
1128	int nextarg;		/* 1-based argument index */
1129
1130	/*
1131	 * Add an argument type to the table, expanding if necessary.
1132	 */
1133#define ADDTYPE(type) \
1134	((nextarg >= tablesize) ? \
1135		__grow_type_table(nextarg, &typetable, &tablesize) : 0, \
1136	(nextarg > tablemax) ? tablemax = nextarg : 0, \
1137	typetable[nextarg++] = type)
1138
1139#define	ADDSARG() \
1140	((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \
1141		((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1142		((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1143		((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
1144		((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT))))))
1145
1146#define	ADDUARG() \
1147	((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \
1148		((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1149		((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1150		((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
1151		((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT))))))
1152
1153	/*
1154	 * Add * arguments to the type array.
1155	 */
1156#define ADDASTER() \
1157	n2 = 0; \
1158	cp = fmt; \
1159	while (is_digit(*cp)) { \
1160		n2 = 10 * n2 + to_digit(*cp); \
1161		cp++; \
1162	} \
1163	if (*cp == '$') { \
1164		int hold = nextarg; \
1165		nextarg = n2; \
1166		ADDTYPE (T_INT); \
1167		nextarg = hold; \
1168		fmt = ++cp; \
1169	} else { \
1170		ADDTYPE (T_INT); \
1171	}
1172	fmt = (wchar_t *)fmt0;
1173	typetable = stattypetable;
1174	tablesize = STATIC_ARG_TBL_SIZE;
1175	tablemax = 0;
1176	nextarg = 1;
1177	memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
1178
1179	/*
1180	 * Scan the format for conversions (`%' character).
1181	 */
1182	for (;;) {
1183		for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
1184			/* void */;
1185		if (ch == '\0')
1186			goto done;
1187		fmt++;		/* skip over '%' */
1188
1189		flags = 0;
1190		width = 0;
1191
1192rflag:		ch = *fmt++;
1193reswitch:	switch (ch) {
1194		case ' ':
1195		case '#':
1196			goto rflag;
1197		case '*':
1198			ADDASTER ();
1199			goto rflag;
1200		case '-':
1201		case '+':
1202		case '\'':
1203			goto rflag;
1204		case '.':
1205			if ((ch = *fmt++) == '*') {
1206				ADDASTER ();
1207				goto rflag;
1208			}
1209			while (is_digit(ch)) {
1210				ch = *fmt++;
1211			}
1212			goto reswitch;
1213		case '0':
1214			goto rflag;
1215		case '1': case '2': case '3': case '4':
1216		case '5': case '6': case '7': case '8': case '9':
1217			n = 0;
1218			do {
1219				n = 10 * n + to_digit(ch);
1220				ch = *fmt++;
1221			} while (is_digit(ch));
1222			if (ch == '$') {
1223				nextarg = n;
1224				goto rflag;
1225			}
1226			width = n;
1227			goto reswitch;
1228#ifdef FLOATING_POINT
1229		case 'L':
1230			flags |= LONGDBL;
1231			goto rflag;
1232#endif
1233		case 'h':
1234			if (flags & SHORTINT) {
1235				flags &= ~SHORTINT;
1236				flags |= CHARINT;
1237			} else
1238				flags |= SHORTINT;
1239			goto rflag;
1240		case 'j':
1241			flags |= INTMAXT;
1242			goto rflag;
1243		case 'l':
1244			if (flags & LONGINT) {
1245				flags &= ~LONGINT;
1246				flags |= LLONGINT;
1247			} else
1248				flags |= LONGINT;
1249			goto rflag;
1250		case 'q':
1251			flags |= LLONGINT;	/* not necessarily */
1252			goto rflag;
1253		case 't':
1254			flags |= PTRDIFFT;
1255			goto rflag;
1256		case 'z':
1257			flags |= SIZET;
1258			goto rflag;
1259		case 'c':
1260			if (flags & LONGINT)
1261				ADDTYPE(T_WINT);
1262			else
1263				ADDTYPE(T_INT);
1264			break;
1265		case 'D':
1266			flags |= LONGINT;
1267			/*FALLTHROUGH*/
1268		case 'd':
1269		case 'i':
1270			ADDSARG();
1271			break;
1272#ifdef FLOATING_POINT
1273#ifdef HEXFLOAT
1274		case 'a':
1275		case 'A':
1276#endif
1277		case 'e':
1278		case 'E':
1279		case 'f':
1280		case 'g':
1281		case 'G':
1282			if (flags & LONGDBL)
1283				ADDTYPE(T_LONG_DOUBLE);
1284			else
1285				ADDTYPE(T_DOUBLE);
1286			break;
1287#endif /* FLOATING_POINT */
1288		case 'n':
1289			if (flags & INTMAXT)
1290				ADDTYPE(TP_INTMAXT);
1291			else if (flags & PTRDIFFT)
1292				ADDTYPE(TP_PTRDIFFT);
1293			else if (flags & SIZET)
1294				ADDTYPE(TP_SIZET);
1295			else if (flags & LLONGINT)
1296				ADDTYPE(TP_LLONG);
1297			else if (flags & LONGINT)
1298				ADDTYPE(TP_LONG);
1299			else if (flags & SHORTINT)
1300				ADDTYPE(TP_SHORT);
1301			else if (flags & CHARINT)
1302				ADDTYPE(TP_SCHAR);
1303			else
1304				ADDTYPE(TP_INT);
1305			continue;	/* no output */
1306		case 'O':
1307			flags |= LONGINT;
1308			/*FALLTHROUGH*/
1309		case 'o':
1310			ADDUARG();
1311			break;
1312		case 'p':
1313			ADDTYPE(TP_VOID);
1314			break;
1315		case 's':
1316			if (flags & LONGINT)
1317				ADDTYPE(TP_WCHAR);
1318			else
1319				ADDTYPE(TP_CHAR);
1320			break;
1321		case 'U':
1322			flags |= LONGINT;
1323			/*FALLTHROUGH*/
1324		case 'u':
1325		case 'X':
1326		case 'x':
1327			ADDUARG();
1328			break;
1329		default:	/* "%?" prints ?, unless ? is NUL */
1330			if (ch == '\0')
1331				goto done;
1332			break;
1333		}
1334	}
1335done:
1336	/*
1337	 * Build the argument table.
1338	 */
1339	if (tablemax >= STATIC_ARG_TBL_SIZE) {
1340		*argtable = (union arg *)
1341		    malloc (sizeof (union arg) * (tablemax + 1));
1342	}
1343
1344	(*argtable) [0].intarg = 0;
1345	for (n = 1; n <= tablemax; n++) {
1346		switch (typetable [n]) {
1347		    case T_UNUSED: /* whoops! */
1348			(*argtable) [n].intarg = va_arg (ap, int);
1349			break;
1350		    case TP_SCHAR:
1351			(*argtable) [n].pschararg = va_arg (ap, signed char *);
1352			break;
1353		    case TP_SHORT:
1354			(*argtable) [n].pshortarg = va_arg (ap, short *);
1355			break;
1356		    case T_INT:
1357			(*argtable) [n].intarg = va_arg (ap, int);
1358			break;
1359		    case T_U_INT:
1360			(*argtable) [n].uintarg = va_arg (ap, unsigned int);
1361			break;
1362		    case TP_INT:
1363			(*argtable) [n].pintarg = va_arg (ap, int *);
1364			break;
1365		    case T_LONG:
1366			(*argtable) [n].longarg = va_arg (ap, long);
1367			break;
1368		    case T_U_LONG:
1369			(*argtable) [n].ulongarg = va_arg (ap, unsigned long);
1370			break;
1371		    case TP_LONG:
1372			(*argtable) [n].plongarg = va_arg (ap, long *);
1373			break;
1374		    case T_LLONG:
1375			(*argtable) [n].longlongarg = va_arg (ap, long long);
1376			break;
1377		    case T_U_LLONG:
1378			(*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long);
1379			break;
1380		    case TP_LLONG:
1381			(*argtable) [n].plonglongarg = va_arg (ap, long long *);
1382			break;
1383		    case T_PTRDIFFT:
1384			(*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t);
1385			break;
1386		    case TP_PTRDIFFT:
1387			(*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *);
1388			break;
1389		    case T_SIZET:
1390			(*argtable) [n].sizearg = va_arg (ap, size_t);
1391			break;
1392		    case TP_SIZET:
1393			(*argtable) [n].psizearg = va_arg (ap, ssize_t *);
1394			break;
1395		    case T_INTMAXT:
1396			(*argtable) [n].intmaxarg = va_arg (ap, intmax_t);
1397			break;
1398		    case T_UINTMAXT:
1399			(*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t);
1400			break;
1401		    case TP_INTMAXT:
1402			(*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *);
1403			break;
1404#ifdef FLOATING_POINT
1405		    case T_DOUBLE:
1406			(*argtable) [n].doublearg = va_arg (ap, double);
1407			break;
1408		    case T_LONG_DOUBLE:
1409			(*argtable) [n].longdoublearg = va_arg (ap, long double);
1410			break;
1411#endif
1412		    case TP_CHAR:
1413			(*argtable) [n].pchararg = va_arg (ap, char *);
1414			break;
1415		    case TP_VOID:
1416			(*argtable) [n].pvoidarg = va_arg (ap, void *);
1417			break;
1418		    case T_WINT:
1419			(*argtable) [n].wintarg = va_arg (ap, wint_t);
1420			break;
1421		    case TP_WCHAR:
1422			(*argtable) [n].pwchararg = va_arg (ap, wchar_t *);
1423			break;
1424		}
1425	}
1426
1427	if ((typetable != NULL) && (typetable != stattypetable))
1428		free (typetable);
1429}
1430
1431/*
1432 * Increase the size of the type table.
1433 */
1434static void
1435__grow_type_table (int nextarg, enum typeid **typetable, int *tablesize)
1436{
1437	enum typeid *const oldtable = *typetable;
1438	const int oldsize = *tablesize;
1439	enum typeid *newtable;
1440	int newsize = oldsize * 2;
1441
1442	if (newsize < nextarg + 1)
1443		newsize = nextarg + 1;
1444	if (oldsize == STATIC_ARG_TBL_SIZE) {
1445		if ((newtable = malloc(newsize)) == NULL)
1446			abort();			/* XXX handle better */
1447		bcopy(oldtable, newtable, oldsize);
1448	} else {
1449		if ((newtable = reallocf(oldtable, newsize)) == NULL)
1450			abort();			/* XXX handle better */
1451	}
1452	memset(&newtable[oldsize], T_UNUSED, newsize - oldsize);
1453
1454	*typetable = newtable;
1455	*tablesize = newsize;
1456}
1457
1458
1459#ifdef FLOATING_POINT
1460
1461extern char *__dtoa(double, int, int, int *, int *, char **, char **);
1462
1463static wchar_t *
1464cvt(double value, int ndigits, int flags, char *sign, int *decpt,
1465    wchar_t ch, int *length, wchar_t **dtoaresultp)
1466{
1467	int i, mode, dsgn;
1468	wchar_t *digits, *bp, *result, *rve;
1469	char *tresult, *trve;
1470
1471	if (ch == 'f')
1472		mode = 3;		/* ndigits after the decimal point */
1473	else {
1474		/*
1475		 * To obtain ndigits after the decimal point for the 'e'
1476		 * and 'E' formats, round to ndigits + 1 significant
1477		 * figures.
1478		 */
1479		if (ch == 'e' || ch == 'E')
1480			ndigits++;
1481		mode = 2;		/* ndigits significant digits */
1482	}
1483	__dtoa(value, mode, ndigits, decpt, &dsgn, &trve, &tresult);
1484	if ((result = malloc((trve - tresult + 1) * sizeof(*result))) == NULL)
1485		abort();		/* XXX handle better */
1486	for (i = 0; i < trve - tresult + 1; i++)
1487		result[i] = (wchar_t)(unsigned char)tresult[i];
1488	rve = result + (trve - tresult);
1489	free(tresult);
1490	*dtoaresultp = result;
1491	digits = result;
1492	*sign = dsgn != 0;
1493	if ((ch != 'g' && ch != 'G') || flags & ALT) {
1494		/* print trailing zeros */
1495		bp = digits + ndigits;
1496		if (ch == 'f') {
1497			if (*digits == '0' && value)
1498				*decpt = -ndigits + 1;
1499			bp += *decpt;
1500		}
1501		if (value == 0)	/* kludge for __dtoa irregularity */
1502			rve = bp;
1503		while (rve < bp)
1504			*rve++ = '0';
1505	}
1506	*length = rve - digits;
1507	return (digits);
1508}
1509
1510static int
1511exponent(wchar_t *p0, int exp, wchar_t fmtch)
1512{
1513	wchar_t *p, *t;
1514	wchar_t expbuf[MAXEXP];
1515
1516	p = p0;
1517	*p++ = fmtch;
1518	if (exp < 0) {
1519		exp = -exp;
1520		*p++ = '-';
1521	}
1522	else
1523		*p++ = '+';
1524	t = expbuf + MAXEXP;
1525	if (exp > 9) {
1526		do {
1527			*--t = to_char(exp % 10);
1528		} while ((exp /= 10) > 9);
1529		*--t = to_char(exp);
1530		for (; t < expbuf + MAXEXP; *p++ = *t++);
1531	}
1532	else {
1533		*p++ = '0';
1534		*p++ = to_char(exp);
1535	}
1536	return (p - p0);
1537}
1538#endif /* FLOATING_POINT */
1539