1/*
2 * Copyright Patrick Powell 1995
3 * This code is based on code written by Patrick Powell (papowell@astart.com)
4 * It may be used for any purpose as long as this notice remains intact
5 * on all source code distributions
6 */
7
8/**************************************************************
9 * Original:
10 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
11 * A bombproof version of doprnt (dopr) included.
12 * Sigh.  This sort of thing is always nasty do deal with.  Note that
13 * the version here does not include floating point...
14 *
15 * snprintf() is used instead of sprintf() as it does limit checks
16 * for string length.  This covers a nasty loophole.
17 *
18 * The other functions are there to prevent NULL pointers from
19 * causing nast effects.
20 *
21 * More Recently:
22 *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
23 *  This was ugly.  It is still ugly.  I opted out of floating point
24 *  numbers, but the formatter understands just about everything
25 *  from the normal C string format, at least as far as I can tell from
26 *  the Solaris 2.5 printf(3S) man page.
27 *
28 *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
29 *    Ok, added some minimal floating point support, which means this
30 *    probably requires libm on most operating systems.  Don't yet
31 *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
32 *    was pretty badly broken, it just wasn't being exercised in ways
33 *    which showed it, so that's been fixed.  Also, formated the code
34 *    to mutt conventions, and removed dead code left over from the
35 *    original.  Also, there is now a builtin-test, just compile with:
36 *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
37 *    and run snprintf for results.
38 *
39 *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
40 *    The PGP code was using unsigned hexadecimal formats.
41 *    Unfortunately, unsigned formats simply didn't work.
42 *
43 *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
44 *    The original code assumed that both snprintf() and vsnprintf() were
45 *    missing.  Some systems only have snprintf() but not vsnprintf(), so
46 *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
47 *
48 *  Andrew Tridgell (tridge@samba.org) Oct 1998
49 *    fixed handling of %.0f
50 *    added test for HAVE_LONG_DOUBLE
51 *
52 * tridge@samba.org, idra@samba.org, April 2001
53 *    got rid of fcvt code (twas buggy and made testing harder)
54 *    added C99 semantics
55 *
56 * date: 2002/12/19 19:56:31;  author: herb;  state: Exp;  lines: +2 -0
57 * actually print args for %g and %e
58 *
59 * date: 2002/06/03 13:37:52;  author: jmcd;  state: Exp;  lines: +8 -0
60 * Since includes.h isn't included here, VA_COPY has to be defined here.  I don't
61 * see any include file that is guaranteed to be here, so I'm defining it
62 * locally.  Fixes AIX and Solaris builds.
63 *
64 * date: 2002/06/03 03:07:24;  author: tridge;  state: Exp;  lines: +5 -13
65 * put the ifdef for HAVE_VA_COPY in one place rather than in lots of
66 * functions
67 *
68 * date: 2002/05/17 14:51:22;  author: jmcd;  state: Exp;  lines: +21 -4
69 * Fix usage of va_list passed as an arg.  Use __va_copy before using it
70 * when it exists.
71 *
72 * date: 2002/04/16 22:38:04;  author: idra;  state: Exp;  lines: +20 -14
73 * Fix incorrect zpadlen handling in fmtfp.
74 * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it.
75 * few mods to make it easier to compile the tests.
76 * addedd the "Ollie" test to the floating point ones.
77 *
78 * Martin Pool (mbp@samba.org) April 2003
79 *    Remove NO_CONFIG_H so that the test case can be built within a source
80 *    tree with less trouble.
81 *    Remove unnecessary SAFE_FREE() definition.
82 *
83 * Martin Pool (mbp@samba.org) May 2003
84 *    Put in a prototype for dummy_snprintf() to quiet compiler warnings.
85 *
86 *    Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
87 *    if the C library has some snprintf functions already.
88 *
89 * Damien Miller (djm@mindrot.org) Jan 2007
90 *    Fix integer overflows in return value.
91 *    Make formatting quite a bit faster by inlining dopr_outch()
92 *
93 **************************************************************/
94
95#include "includes.h"
96
97#if defined(BROKEN_SNPRINTF)		/* For those with broken snprintf() */
98# undef HAVE_SNPRINTF
99# undef HAVE_VSNPRINTF
100#endif
101
102#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
103
104#include <ctype.h>
105#include <stdarg.h>
106#include <stdlib.h>
107#include <string.h>
108#include <limits.h>
109#include <errno.h>
110
111#ifdef HAVE_LONG_DOUBLE
112# define LDOUBLE long double
113#else
114# define LDOUBLE double
115#endif
116
117#ifdef HAVE_LONG_LONG
118# define LLONG long long
119#else
120# define LLONG long
121#endif
122
123/*
124 * dopr(): poor man's version of doprintf
125 */
126
127/* format read states */
128#define DP_S_DEFAULT 0
129#define DP_S_FLAGS   1
130#define DP_S_MIN     2
131#define DP_S_DOT     3
132#define DP_S_MAX     4
133#define DP_S_MOD     5
134#define DP_S_CONV    6
135#define DP_S_DONE    7
136
137/* format flags - Bits */
138#define DP_F_MINUS 	(1 << 0)
139#define DP_F_PLUS  	(1 << 1)
140#define DP_F_SPACE 	(1 << 2)
141#define DP_F_NUM   	(1 << 3)
142#define DP_F_ZERO  	(1 << 4)
143#define DP_F_UP    	(1 << 5)
144#define DP_F_UNSIGNED 	(1 << 6)
145
146/* Conversion Flags */
147#define DP_C_SHORT   1
148#define DP_C_LONG    2
149#define DP_C_LDOUBLE 3
150#define DP_C_LLONG   4
151#define DP_C_SIZE    5
152#define DP_C_INTMAX  6
153
154#define char_to_int(p) ((p)- '0')
155#ifndef MAX
156# define MAX(p,q) (((p) >= (q)) ? (p) : (q))
157#endif
158
159#define DOPR_OUTCH(buf, pos, buflen, thechar) \
160	do { \
161		if (pos + 1 >= INT_MAX) { \
162			errno = ERANGE; \
163			return -1; \
164		} \
165		if (pos < buflen) \
166			buf[pos] = thechar; \
167		(pos)++; \
168	} while (0)
169
170static int dopr(char *buffer, size_t maxlen, const char *format,
171    va_list args_in);
172static int fmtstr(char *buffer, size_t *currlen, size_t maxlen,
173    char *value, int flags, int min, int max);
174static int fmtint(char *buffer, size_t *currlen, size_t maxlen,
175    intmax_t value, int base, int min, int max, int flags);
176static int fmtfp(char *buffer, size_t *currlen, size_t maxlen,
177    LDOUBLE fvalue, int min, int max, int flags);
178
179static int
180dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
181{
182	char ch;
183	intmax_t value;
184	LDOUBLE fvalue;
185	char *strvalue;
186	int min;
187	int max;
188	int state;
189	int flags;
190	int cflags;
191	size_t currlen;
192	va_list args;
193
194	VA_COPY(args, args_in);
195
196	state = DP_S_DEFAULT;
197	currlen = flags = cflags = min = 0;
198	max = -1;
199	ch = *format++;
200
201	while (state != DP_S_DONE) {
202		if (ch == '\0')
203			state = DP_S_DONE;
204
205		switch(state) {
206		case DP_S_DEFAULT:
207			if (ch == '%')
208				state = DP_S_FLAGS;
209			else
210				DOPR_OUTCH(buffer, currlen, maxlen, ch);
211			ch = *format++;
212			break;
213		case DP_S_FLAGS:
214			switch (ch) {
215			case '-':
216				flags |= DP_F_MINUS;
217				ch = *format++;
218				break;
219			case '+':
220				flags |= DP_F_PLUS;
221				ch = *format++;
222				break;
223			case ' ':
224				flags |= DP_F_SPACE;
225				ch = *format++;
226				break;
227			case '#':
228				flags |= DP_F_NUM;
229				ch = *format++;
230				break;
231			case '0':
232				flags |= DP_F_ZERO;
233				ch = *format++;
234				break;
235			default:
236				state = DP_S_MIN;
237				break;
238			}
239			break;
240		case DP_S_MIN:
241			if (isdigit((unsigned char)ch)) {
242				min = 10*min + char_to_int (ch);
243				ch = *format++;
244			} else if (ch == '*') {
245				min = va_arg (args, int);
246				ch = *format++;
247				state = DP_S_DOT;
248			} else {
249				state = DP_S_DOT;
250			}
251			break;
252		case DP_S_DOT:
253			if (ch == '.') {
254				state = DP_S_MAX;
255				ch = *format++;
256			} else {
257				state = DP_S_MOD;
258			}
259			break;
260		case DP_S_MAX:
261			if (isdigit((unsigned char)ch)) {
262				if (max < 0)
263					max = 0;
264				max = 10*max + char_to_int (ch);
265				ch = *format++;
266			} else if (ch == '*') {
267				max = va_arg (args, int);
268				ch = *format++;
269				state = DP_S_MOD;
270			} else {
271				state = DP_S_MOD;
272			}
273			break;
274		case DP_S_MOD:
275			switch (ch) {
276			case 'h':
277				cflags = DP_C_SHORT;
278				ch = *format++;
279				break;
280			case 'j':
281				cflags = DP_C_INTMAX;
282				ch = *format++;
283				break;
284			case 'l':
285				cflags = DP_C_LONG;
286				ch = *format++;
287				if (ch == 'l') {	/* It's a long long */
288					cflags = DP_C_LLONG;
289					ch = *format++;
290				}
291				break;
292			case 'L':
293				cflags = DP_C_LDOUBLE;
294				ch = *format++;
295				break;
296			case 'z':
297				cflags = DP_C_SIZE;
298				ch = *format++;
299				break;
300			default:
301				break;
302			}
303			state = DP_S_CONV;
304			break;
305		case DP_S_CONV:
306			switch (ch) {
307			case 'd':
308			case 'i':
309				if (cflags == DP_C_SHORT)
310					value = va_arg (args, int);
311				else if (cflags == DP_C_LONG)
312					value = va_arg (args, long int);
313				else if (cflags == DP_C_LLONG)
314					value = va_arg (args, LLONG);
315				else if (cflags == DP_C_SIZE)
316					value = va_arg (args, ssize_t);
317				else if (cflags == DP_C_INTMAX)
318					value = va_arg (args, intmax_t);
319				else
320					value = va_arg (args, int);
321				if (fmtint(buffer, &currlen, maxlen,
322				    value, 10, min, max, flags) == -1)
323					return -1;
324				break;
325			case 'o':
326				flags |= DP_F_UNSIGNED;
327				if (cflags == DP_C_SHORT)
328					value = va_arg (args, unsigned int);
329				else if (cflags == DP_C_LONG)
330					value = (long)va_arg (args, unsigned long int);
331				else if (cflags == DP_C_LLONG)
332					value = (long)va_arg (args, unsigned LLONG);
333				else if (cflags == DP_C_SIZE)
334					value = va_arg (args, size_t);
335#ifdef notyet
336				else if (cflags == DP_C_INTMAX)
337					value = va_arg (args, uintmax_t);
338#endif
339				else
340					value = (long)va_arg (args, unsigned int);
341				if (fmtint(buffer, &currlen, maxlen, value,
342				    8, min, max, flags) == -1)
343					return -1;
344				break;
345			case 'u':
346				flags |= DP_F_UNSIGNED;
347				if (cflags == DP_C_SHORT)
348					value = va_arg (args, unsigned int);
349				else if (cflags == DP_C_LONG)
350					value = (long)va_arg (args, unsigned long int);
351				else if (cflags == DP_C_LLONG)
352					value = (LLONG)va_arg (args, unsigned LLONG);
353				else if (cflags == DP_C_SIZE)
354					value = va_arg (args, size_t);
355#ifdef notyet
356				else if (cflags == DP_C_INTMAX)
357					value = va_arg (args, uintmax_t);
358#endif
359				else
360					value = (long)va_arg (args, unsigned int);
361				if (fmtint(buffer, &currlen, maxlen, value,
362				    10, min, max, flags) == -1)
363					return -1;
364				break;
365			case 'X':
366				flags |= DP_F_UP;
367			case 'x':
368				flags |= DP_F_UNSIGNED;
369				if (cflags == DP_C_SHORT)
370					value = va_arg (args, unsigned int);
371				else if (cflags == DP_C_LONG)
372					value = (long)va_arg (args, unsigned long int);
373				else if (cflags == DP_C_LLONG)
374					value = (LLONG)va_arg (args, unsigned LLONG);
375				else if (cflags == DP_C_SIZE)
376					value = va_arg (args, size_t);
377#ifdef notyet
378				else if (cflags == DP_C_INTMAX)
379					value = va_arg (args, uintmax_t);
380#endif
381				else
382					value = (long)va_arg (args, unsigned int);
383				if (fmtint(buffer, &currlen, maxlen, value,
384				    16, min, max, flags) == -1)
385					return -1;
386				break;
387			case 'f':
388				if (cflags == DP_C_LDOUBLE)
389					fvalue = va_arg (args, LDOUBLE);
390				else
391					fvalue = va_arg (args, double);
392				if (fmtfp(buffer, &currlen, maxlen, fvalue,
393				    min, max, flags) == -1)
394					return -1;
395				break;
396			case 'E':
397				flags |= DP_F_UP;
398			case 'e':
399				if (cflags == DP_C_LDOUBLE)
400					fvalue = va_arg (args, LDOUBLE);
401				else
402					fvalue = va_arg (args, double);
403				if (fmtfp(buffer, &currlen, maxlen, fvalue,
404				    min, max, flags) == -1)
405					return -1;
406				break;
407			case 'G':
408				flags |= DP_F_UP;
409			case 'g':
410				if (cflags == DP_C_LDOUBLE)
411					fvalue = va_arg (args, LDOUBLE);
412				else
413					fvalue = va_arg (args, double);
414				if (fmtfp(buffer, &currlen, maxlen, fvalue,
415				    min, max, flags) == -1)
416					return -1;
417				break;
418			case 'c':
419				DOPR_OUTCH(buffer, currlen, maxlen,
420				    va_arg (args, int));
421				break;
422			case 's':
423				strvalue = va_arg (args, char *);
424				if (!strvalue) strvalue = "(NULL)";
425				if (max == -1) {
426					max = strlen(strvalue);
427				}
428				if (min > 0 && max >= 0 && min > max) max = min;
429				if (fmtstr(buffer, &currlen, maxlen,
430				    strvalue, flags, min, max) == -1)
431					return -1;
432				break;
433			case 'p':
434				strvalue = va_arg (args, void *);
435				if (fmtint(buffer, &currlen, maxlen,
436				    (long) strvalue, 16, min, max, flags) == -1)
437					return -1;
438				break;
439#if we_dont_want_this_in_openssh
440			case 'n':
441				if (cflags == DP_C_SHORT) {
442					short int *num;
443					num = va_arg (args, short int *);
444					*num = currlen;
445				} else if (cflags == DP_C_LONG) {
446					long int *num;
447					num = va_arg (args, long int *);
448					*num = (long int)currlen;
449				} else if (cflags == DP_C_LLONG) {
450					LLONG *num;
451					num = va_arg (args, LLONG *);
452					*num = (LLONG)currlen;
453				} else if (cflags == DP_C_SIZE) {
454					ssize_t *num;
455					num = va_arg (args, ssize_t *);
456					*num = (ssize_t)currlen;
457				} else if (cflags == DP_C_INTMAX) {
458					intmax_t *num;
459					num = va_arg (args, intmax_t *);
460					*num = (intmax_t)currlen;
461				} else {
462					int *num;
463					num = va_arg (args, int *);
464					*num = currlen;
465				}
466				break;
467#endif
468			case '%':
469				DOPR_OUTCH(buffer, currlen, maxlen, ch);
470				break;
471			case 'w':
472				/* not supported yet, treat as next char */
473				ch = *format++;
474				break;
475			default:
476				/* Unknown, skip */
477				break;
478			}
479			ch = *format++;
480			state = DP_S_DEFAULT;
481			flags = cflags = min = 0;
482			max = -1;
483			break;
484		case DP_S_DONE:
485			break;
486		default:
487			/* hmm? */
488			break; /* some picky compilers need this */
489		}
490	}
491	if (maxlen != 0) {
492		if (currlen < maxlen - 1)
493			buffer[currlen] = '\0';
494		else if (maxlen > 0)
495			buffer[maxlen - 1] = '\0';
496	}
497
498	return currlen < INT_MAX ? (int)currlen : -1;
499}
500
501static int
502fmtstr(char *buffer, size_t *currlen, size_t maxlen,
503    char *value, int flags, int min, int max)
504{
505	int padlen, strln;     /* amount to pad */
506	int cnt = 0;
507
508#ifdef DEBUG_SNPRINTF
509	printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
510#endif
511	if (value == 0) {
512		value = "<NULL>";
513	}
514
515	for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
516	padlen = min - strln;
517	if (padlen < 0)
518		padlen = 0;
519	if (flags & DP_F_MINUS)
520		padlen = -padlen; /* Left Justify */
521
522	while ((padlen > 0) && (cnt < max)) {
523		DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
524		--padlen;
525		++cnt;
526	}
527	while (*value && (cnt < max)) {
528		DOPR_OUTCH(buffer, *currlen, maxlen, *value);
529		value++;
530		++cnt;
531	}
532	while ((padlen < 0) && (cnt < max)) {
533		DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
534		++padlen;
535		++cnt;
536	}
537	return 0;
538}
539
540/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
541
542static int
543fmtint(char *buffer, size_t *currlen, size_t maxlen,
544    intmax_t value, int base, int min, int max, int flags)
545{
546	int signvalue = 0;
547	unsigned LLONG uvalue;
548	char convert[20];
549	int place = 0;
550	int spadlen = 0; /* amount to space pad */
551	int zpadlen = 0; /* amount to zero pad */
552	int caps = 0;
553
554	if (max < 0)
555		max = 0;
556
557	uvalue = value;
558
559	if(!(flags & DP_F_UNSIGNED)) {
560		if( value < 0 ) {
561			signvalue = '-';
562			uvalue = -value;
563		} else {
564			if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
565				signvalue = '+';
566			else if (flags & DP_F_SPACE)
567				signvalue = ' ';
568		}
569	}
570
571	if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
572
573	do {
574		convert[place++] =
575			(caps? "0123456789ABCDEF":"0123456789abcdef")
576			[uvalue % (unsigned)base  ];
577		uvalue = (uvalue / (unsigned)base );
578	} while(uvalue && (place < 20));
579	if (place == 20) place--;
580	convert[place] = 0;
581
582	zpadlen = max - place;
583	spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
584	if (zpadlen < 0) zpadlen = 0;
585	if (spadlen < 0) spadlen = 0;
586	if (flags & DP_F_ZERO) {
587		zpadlen = MAX(zpadlen, spadlen);
588		spadlen = 0;
589	}
590	if (flags & DP_F_MINUS)
591		spadlen = -spadlen; /* Left Justifty */
592
593#ifdef DEBUG_SNPRINTF
594	printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
595	       zpadlen, spadlen, min, max, place);
596#endif
597
598	/* Spaces */
599	while (spadlen > 0) {
600		DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
601		--spadlen;
602	}
603
604	/* Sign */
605	if (signvalue)
606		DOPR_OUTCH(buffer, *currlen, maxlen, signvalue);
607
608	/* Zeros */
609	if (zpadlen > 0) {
610		while (zpadlen > 0) {
611			DOPR_OUTCH(buffer, *currlen, maxlen, '0');
612			--zpadlen;
613		}
614	}
615
616	/* Digits */
617	while (place > 0) {
618		--place;
619		DOPR_OUTCH(buffer, *currlen, maxlen, convert[place]);
620	}
621
622	/* Left Justified spaces */
623	while (spadlen < 0) {
624		DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
625		++spadlen;
626	}
627	return 0;
628}
629
630static LDOUBLE abs_val(LDOUBLE value)
631{
632	LDOUBLE result = value;
633
634	if (value < 0)
635		result = -value;
636
637	return result;
638}
639
640static LDOUBLE POW10(int val)
641{
642	LDOUBLE result = 1;
643
644	while (val) {
645		result *= 10;
646		val--;
647	}
648
649	return result;
650}
651
652static LLONG ROUND(LDOUBLE value)
653{
654	LLONG intpart;
655
656	intpart = (LLONG)value;
657	value = value - intpart;
658	if (value >= 0.5) intpart++;
659
660	return intpart;
661}
662
663/* a replacement for modf that doesn't need the math library. Should
664   be portable, but slow */
665static double my_modf(double x0, double *iptr)
666{
667	int i;
668	long l;
669	double x = x0;
670	double f = 1.0;
671
672	for (i=0;i<100;i++) {
673		l = (long)x;
674		if (l <= (x+1) && l >= (x-1)) break;
675		x *= 0.1;
676		f *= 10.0;
677	}
678
679	if (i == 100) {
680		/*
681		 * yikes! the number is beyond what we can handle.
682		 * What do we do?
683		 */
684		(*iptr) = 0;
685		return 0;
686	}
687
688	if (i != 0) {
689		double i2;
690		double ret;
691
692		ret = my_modf(x0-l*f, &i2);
693		(*iptr) = l*f + i2;
694		return ret;
695	}
696
697	(*iptr) = l;
698	return x - (*iptr);
699}
700
701
702static int
703fmtfp (char *buffer, size_t *currlen, size_t maxlen,
704    LDOUBLE fvalue, int min, int max, int flags)
705{
706	int signvalue = 0;
707	double ufvalue;
708	char iconvert[311];
709	char fconvert[311];
710	int iplace = 0;
711	int fplace = 0;
712	int padlen = 0; /* amount to pad */
713	int zpadlen = 0;
714	int caps = 0;
715	int idx;
716	double intpart;
717	double fracpart;
718	double temp;
719
720	/*
721	 * AIX manpage says the default is 0, but Solaris says the default
722	 * is 6, and sprintf on AIX defaults to 6
723	 */
724	if (max < 0)
725		max = 6;
726
727	ufvalue = abs_val (fvalue);
728
729	if (fvalue < 0) {
730		signvalue = '-';
731	} else {
732		if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
733			signvalue = '+';
734		} else {
735			if (flags & DP_F_SPACE)
736				signvalue = ' ';
737		}
738	}
739
740#if 0
741	if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
742#endif
743
744#if 0
745	 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
746#endif
747
748	/*
749	 * Sorry, we only support 16 digits past the decimal because of our
750	 * conversion method
751	 */
752	if (max > 16)
753		max = 16;
754
755	/* We "cheat" by converting the fractional part to integer by
756	 * multiplying by a factor of 10
757	 */
758
759	temp = ufvalue;
760	my_modf(temp, &intpart);
761
762	fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
763
764	if (fracpart >= POW10(max)) {
765		intpart++;
766		fracpart -= POW10(max);
767	}
768
769	/* Convert integer part */
770	do {
771		temp = intpart*0.1;
772		my_modf(temp, &intpart);
773		idx = (int) ((temp -intpart +0.05)* 10.0);
774		/* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
775		/* printf ("%llf, %f, %x\n", temp, intpart, idx); */
776		iconvert[iplace++] =
777			(caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
778	} while (intpart && (iplace < 311));
779	if (iplace == 311) iplace--;
780	iconvert[iplace] = 0;
781
782	/* Convert fractional part */
783	if (fracpart)
784	{
785		do {
786			temp = fracpart*0.1;
787			my_modf(temp, &fracpart);
788			idx = (int) ((temp -fracpart +0.05)* 10.0);
789			/* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
790			/* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
791			fconvert[fplace++] =
792			(caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
793		} while(fracpart && (fplace < 311));
794		if (fplace == 311) fplace--;
795	}
796	fconvert[fplace] = 0;
797
798	/* -1 for decimal point, another -1 if we are printing a sign */
799	padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
800	zpadlen = max - fplace;
801	if (zpadlen < 0) zpadlen = 0;
802	if (padlen < 0)
803		padlen = 0;
804	if (flags & DP_F_MINUS)
805		padlen = -padlen; /* Left Justifty */
806
807	if ((flags & DP_F_ZERO) && (padlen > 0)) {
808		if (signvalue) {
809			DOPR_OUTCH(buffer, *currlen, maxlen, signvalue);
810			--padlen;
811			signvalue = 0;
812		}
813		while (padlen > 0) {
814			DOPR_OUTCH(buffer, *currlen, maxlen, '0');
815			--padlen;
816		}
817	}
818	while (padlen > 0) {
819		DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
820		--padlen;
821	}
822	if (signvalue)
823		DOPR_OUTCH(buffer, *currlen, maxlen, signvalue);
824
825	while (iplace > 0) {
826		--iplace;
827		DOPR_OUTCH(buffer, *currlen, maxlen, iconvert[iplace]);
828	}
829
830#ifdef DEBUG_SNPRINTF
831	printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
832#endif
833
834	/*
835	 * Decimal point.  This should probably use locale to find the correct
836	 * char to print out.
837	 */
838	if (max > 0) {
839		DOPR_OUTCH(buffer, *currlen, maxlen, '.');
840
841		while (zpadlen > 0) {
842			DOPR_OUTCH(buffer, *currlen, maxlen, '0');
843			--zpadlen;
844		}
845
846		while (fplace > 0) {
847			--fplace;
848			DOPR_OUTCH(buffer, *currlen, maxlen, fconvert[fplace]);
849		}
850	}
851
852	while (padlen < 0) {
853		DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
854		++padlen;
855	}
856	return 0;
857}
858#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */
859
860#if !defined(HAVE_VSNPRINTF)
861int
862vsnprintf (char *str, size_t count, const char *fmt, va_list args)
863{
864	return dopr(str, count, fmt, args);
865}
866#endif
867
868#if !defined(HAVE_SNPRINTF)
869int
870snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...)
871{
872	size_t ret;
873	va_list ap;
874
875	va_start(ap, fmt);
876	ret = vsnprintf(str, count, fmt, ap);
877	va_end(ap);
878	return ret;
879}
880#endif
881