summaryrefslogtreecommitdiff
path: root/openbsd-compat/bsd-snprintf.c
blob: 571c61fc02dd0fc4a406000a0b09249d621d561f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
/*
 * Copyright Patrick Powell 1995
 * This code is based on code written by Patrick Powell (papowell@astart.com)
 * It may be used for any purpose as long as this notice remains intact
 * on all source code distributions
 */

/**************************************************************
 * Original:
 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
 * A bombproof version of doprnt (dopr) included.
 * Sigh.  This sort of thing is always nasty do deal with.  Note that
 * the version here does not include floating point...
 *
 * snprintf() is used instead of sprintf() as it does limit checks
 * for string length.  This covers a nasty loophole.
 *
 * The other functions are there to prevent NULL pointers from
 * causing nast effects.
 *
 * More Recently:
 *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
 *  This was ugly.  It is still ugly.  I opted out of floating point
 *  numbers, but the formatter understands just about everything
 *  from the normal C string format, at least as far as I can tell from
 *  the Solaris 2.5 printf(3S) man page.
 *
 *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
 *    Ok, added some minimal floating point support, which means this
 *    probably requires libm on most operating systems.  Don't yet
 *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
 *    was pretty badly broken, it just wasn't being exercised in ways
 *    which showed it, so that's been fixed.  Also, formated the code
 *    to mutt conventions, and removed dead code left over from the
 *    original.  Also, there is now a builtin-test, just compile with:
 *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
 *    and run snprintf for results.
 * 
 *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
 *    The PGP code was using unsigned hexadecimal formats. 
 *    Unfortunately, unsigned formats simply didn't work.
 *
 *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
 *    The original code assumed that both snprintf() and vsnprintf() were
 *    missing.  Some systems only have snprintf() but not vsnprintf(), so
 *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
 *
 *  Andrew Tridgell (tridge@samba.org) Oct 1998
 *    fixed handling of %.0f
 *    added test for HAVE_LONG_DOUBLE
 *
 * tridge@samba.org, idra@samba.org, April 2001
 *    got rid of fcvt code (twas buggy and made testing harder)
 *    added C99 semantics
 *
 * date: 2002/12/19 19:56:31;  author: herb;  state: Exp;  lines: +2 -0
 * actually print args for %g and %e
 * 
 * date: 2002/06/03 13:37:52;  author: jmcd;  state: Exp;  lines: +8 -0
 * Since includes.h isn't included here, VA_COPY has to be defined here.  I don't
 * see any include file that is guaranteed to be here, so I'm defining it
 * locally.  Fixes AIX and Solaris builds.
 * 
 * date: 2002/06/03 03:07:24;  author: tridge;  state: Exp;  lines: +5 -13
 * put the ifdef for HAVE_VA_COPY in one place rather than in lots of
 * functions
 * 
 * date: 2002/05/17 14:51:22;  author: jmcd;  state: Exp;  lines: +21 -4
 * Fix usage of va_list passed as an arg.  Use __va_copy before using it
 * when it exists.
 * 
 * date: 2002/04/16 22:38:04;  author: idra;  state: Exp;  lines: +20 -14
 * Fix incorrect zpadlen handling in fmtfp.
 * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it.
 * few mods to make it easier to compile the tests.
 * addedd the "Ollie" test to the floating point ones.
 *
 * Martin Pool (mbp@samba.org) April 2003
 *    Remove NO_CONFIG_H so that the test case can be built within a source
 *    tree with less trouble.
 *    Remove unnecessary SAFE_FREE() definition.
 *
 * Martin Pool (mbp@samba.org) May 2003
 *    Put in a prototype for dummy_snprintf() to quiet compiler warnings.
 *
 *    Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
 *    if the C library has some snprintf functions already.
 **************************************************************/

#include "includes.h"

RCSID("$Id: bsd-snprintf.c,v 1.12 2006/03/18 13:07:07 dtucker Exp $");

#if defined(BROKEN_SNPRINTF)		/* For those with broken snprintf() */
# undef HAVE_SNPRINTF
# undef HAVE_VSNPRINTF
#endif

#ifndef VA_COPY
# ifdef HAVE_VA_COPY
#  define VA_COPY(dest, src) va_copy(dest, src)
# else
#  ifdef HAVE___VA_COPY
#   define VA_COPY(dest, src) __va_copy(dest, src)
#  else
#   define VA_COPY(dest, src) (dest) = (src)
#  endif
# endif
#endif

#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)

#ifdef HAVE_LONG_DOUBLE
# define LDOUBLE long double
#else
# define LDOUBLE double
#endif

#ifdef HAVE_LONG_LONG
# define LLONG long long
#else
# define LLONG long
#endif

/*
 * dopr(): poor man's version of doprintf
 */

/* format read states */
#define DP_S_DEFAULT 0
#define DP_S_FLAGS   1
#define DP_S_MIN     2
#define DP_S_DOT     3
#define DP_S_MAX     4
#define DP_S_MOD     5
#define DP_S_CONV    6
#define DP_S_DONE    7

/* format flags - Bits */
#define DP_F_MINUS 	(1 << 0)
#define DP_F_PLUS  	(1 << 1)
#define DP_F_SPACE 	(1 << 2)
#define DP_F_NUM   	(1 << 3)
#define DP_F_ZERO  	(1 << 4)
#define DP_F_UP    	(1 << 5)
#define DP_F_UNSIGNED 	(1 << 6)

/* Conversion Flags */
#define DP_C_SHORT   1
#define DP_C_LONG    2
#define DP_C_LDOUBLE 3
#define DP_C_LLONG   4

#define char_to_int(p) ((p)- '0')
#ifndef MAX
# define MAX(p,q) (((p) >= (q)) ? (p) : (q))
#endif

static size_t dopr(char *buffer, size_t maxlen, const char *format, 
		   va_list args_in);
static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
		    char *value, int flags, int min, int max);
static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
		    LLONG value, int base, int min, int max, int flags);
static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
		   LDOUBLE fvalue, int min, int max, int flags);
static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);

static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
{
	char ch;
	LLONG value;
	LDOUBLE fvalue;
	char *strvalue;
	int min;
	int max;
	int state;
	int flags;
	int cflags;
	size_t currlen;
	va_list args;

	VA_COPY(args, args_in);
	
	state = DP_S_DEFAULT;
	currlen = flags = cflags = min = 0;
	max = -1;
	ch = *format++;
	
	while (state != DP_S_DONE) {
		if (ch == '\0') 
			state = DP_S_DONE;

		switch(state) {
		case DP_S_DEFAULT:
			if (ch == '%') 
				state = DP_S_FLAGS;
			else 
				dopr_outch (buffer, &currlen, maxlen, ch);
			ch = *format++;
			break;
		case DP_S_FLAGS:
			switch (ch) {
			case '-':
				flags |= DP_F_MINUS;
				ch = *format++;
				break;
			case '+':
				flags |= DP_F_PLUS;
				ch = *format++;
				break;
			case ' ':
				flags |= DP_F_SPACE;
				ch = *format++;
				break;
			case '#':
				flags |= DP_F_NUM;
				ch = *format++;
				break;
			case '0':
				flags |= DP_F_ZERO;
				ch = *format++;
				break;
			default:
				state = DP_S_MIN;
				break;
			}
			break;
		case DP_S_MIN:
			if (isdigit((unsigned char)ch)) {
				min = 10*min + char_to_int (ch);
				ch = *format++;
			} else if (ch == '*') {
				min = va_arg (args, int);
				ch = *format++;
				state = DP_S_DOT;
			} else {
				state = DP_S_DOT;
			}
			break;
		case DP_S_DOT:
			if (ch == '.') {
				state = DP_S_MAX;
				ch = *format++;
			} else { 
				state = DP_S_MOD;
			}
			break;
		case DP_S_MAX:
			if (isdigit((unsigned char)ch)) {
				if (max < 0)
					max = 0;
				max = 10*max + char_to_int (ch);
				ch = *format++;
			} else if (ch == '*') {
				max = va_arg (args, int);
				ch = *format++;
				state = DP_S_MOD;
			} else {
				state = DP_S_MOD;
			}
			break;
		case DP_S_MOD:
			switch (ch) {
			case 'h':
				cflags = DP_C_SHORT;
				ch = *format++;
				break;
			case 'l':
				cflags = DP_C_LONG;
				ch = *format++;
				if (ch == 'l') {	/* It's a long long */
					cflags = DP_C_LLONG;
					ch = *format++;
				}
				break;
			case 'L':
				cflags = DP_C_LDOUBLE;
				ch = *format++;
				break;
			default:
				break;
			}
			state = DP_S_CONV;
			break;
		case DP_S_CONV:
			switch (ch) {
			case 'd':
			case 'i':
				if (cflags == DP_C_SHORT) 
					value = va_arg (args, int);
				else if (cflags == DP_C_LONG)
					value = va_arg (args, long int);
				else if (cflags == DP_C_LLONG)
					value = va_arg (args, LLONG);
				else
					value = va_arg (args, int);
				fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
				break;
			case 'o':
				flags |= DP_F_UNSIGNED;
				if (cflags == DP_C_SHORT)
					value = va_arg (args, unsigned int);
				else if (cflags == DP_C_LONG)
					value = (long)va_arg (args, unsigned long int);
				else if (cflags == DP_C_LLONG)
					value = (long)va_arg (args, unsigned LLONG);
				else
					value = (long)va_arg (args, unsigned int);
				fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
				break;
			case 'u':
				flags |= DP_F_UNSIGNED;
				if (cflags == DP_C_SHORT)
					value = va_arg (args, unsigned int);
				else if (cflags == DP_C_LONG)
					value = (long)va_arg (args, unsigned long int);
				else if (cflags == DP_C_LLONG)
					value = (LLONG)va_arg (args, unsigned LLONG);
				else
					value = (long)va_arg (args, unsigned int);
				fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
				break;
			case 'X':
				flags |= DP_F_UP;
			case 'x':
				flags |= DP_F_UNSIGNED;
				if (cflags == DP_C_SHORT)
					value = va_arg (args, unsigned int);
				else if (cflags == DP_C_LONG)
					value = (long)va_arg (args, unsigned long int);
				else if (cflags == DP_C_LLONG)
					value = (LLONG)va_arg (args, unsigned LLONG);
				else
					value = (long)va_arg (args, unsigned int);
				fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
				break;
			case 'f':
				if (cflags == DP_C_LDOUBLE)
					fvalue = va_arg (args, LDOUBLE);
				else
					fvalue = va_arg (args, double);
				/* um, floating point? */
				fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
				break;
			case 'E':
				flags |= DP_F_UP;
			case 'e':
				if (cflags == DP_C_LDOUBLE)
					fvalue = va_arg (args, LDOUBLE);
				else
					fvalue = va_arg (args, double);
				fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
				break;
			case 'G':
				flags |= DP_F_UP;
			case 'g':
				if (cflags == DP_C_LDOUBLE)
					fvalue = va_arg (args, LDOUBLE);
				else
					fvalue = va_arg (args, double);
				fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
				break;
			case 'c':
				dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
				break;
			case 's':
				strvalue = va_arg (args, char *);
				if (!strvalue) strvalue = "(NULL)";
				if (max == -1) {
					max = strlen(strvalue);
				}
				if (min > 0 && max >= 0 && min > max) max = min;
				fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
				break;
			case 'p':
				strvalue = va_arg (args, void *);
				fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
				break;
			case 'n':
				if (cflags == DP_C_SHORT) {
					short int *num;
					num = va_arg (args, short int *);
					*num = currlen;
				} else if (cflags == DP_C_LONG) {
					long int *num;
					num = va_arg (args, long int *);
					*num = (long int)currlen;
				} else if (cflags == DP_C_LLONG) {
					LLONG *num;
					num = va_arg (args, LLONG *);
					*num = (LLONG)currlen;
				} else {
					int *num;
					num = va_arg (args, int *);
					*num = currlen;
				}
				break;
			case '%':
				dopr_outch (buffer, &currlen, maxlen, ch);
				break;
			case 'w':
				/* not supported yet, treat as next char */
				ch = *format++;
				break;
			default:
				/* Unknown, skip */
				break;
			}
			ch = *format++;
			state = DP_S_DEFAULT;
			flags = cflags = min = 0;
			max = -1;
			break;
		case DP_S_DONE:
			break;
		default:
			/* hmm? */
			break; /* some picky compilers need this */
		}
	}
	if (maxlen != 0) {
		if (currlen < maxlen - 1) 
			buffer[currlen] = '\0';
		else if (maxlen > 0) 
			buffer[maxlen - 1] = '\0';
	}
	
	return currlen;
}

static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
		    char *value, int flags, int min, int max)
{
	int padlen, strln;     /* amount to pad */
	int cnt = 0;

#ifdef DEBUG_SNPRINTF
	printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
#endif
	if (value == 0) {
		value = "<NULL>";
	}

	for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
	padlen = min - strln;
	if (padlen < 0) 
		padlen = 0;
	if (flags & DP_F_MINUS) 
		padlen = -padlen; /* Left Justify */
	
	while ((padlen > 0) && (cnt < max)) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		--padlen;
		++cnt;
	}
	while (*value && (cnt < max)) {
		dopr_outch (buffer, currlen, maxlen, *value++);
		++cnt;
	}
	while ((padlen < 0) && (cnt < max)) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		++padlen;
		++cnt;
	}
}

/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */

static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
		    LLONG value, int base, int min, int max, int flags)
{
	int signvalue = 0;
	unsigned LLONG uvalue;
	char convert[20];
	int place = 0;
	int spadlen = 0; /* amount to space pad */
	int zpadlen = 0; /* amount to zero pad */
	int caps = 0;
	
	if (max < 0)
		max = 0;
	
	uvalue = value;
	
	if(!(flags & DP_F_UNSIGNED)) {
		if( value < 0 ) {
			signvalue = '-';
			uvalue = -value;
		} else {
			if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
				signvalue = '+';
			else if (flags & DP_F_SPACE)
				signvalue = ' ';
		}
	}
  
	if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */

	do {
		convert[place++] =
			(caps? "0123456789ABCDEF":"0123456789abcdef")
			[uvalue % (unsigned)base  ];
		uvalue = (uvalue / (unsigned)base );
	} while(uvalue && (place < 20));
	if (place == 20) place--;
	convert[place] = 0;

	zpadlen = max - place;
	spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
	if (zpadlen < 0) zpadlen = 0;
	if (spadlen < 0) spadlen = 0;
	if (flags & DP_F_ZERO) {
		zpadlen = MAX(zpadlen, spadlen);
		spadlen = 0;
	}
	if (flags & DP_F_MINUS) 
		spadlen = -spadlen; /* Left Justifty */

#ifdef DEBUG_SNPRINTF
	printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
	       zpadlen, spadlen, min, max, place);
#endif

	/* Spaces */
	while (spadlen > 0) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		--spadlen;
	}

	/* Sign */
	if (signvalue) 
		dopr_outch (buffer, currlen, maxlen, signvalue);

	/* Zeros */
	if (zpadlen > 0) {
		while (zpadlen > 0) {
			dopr_outch (buffer, currlen, maxlen, '0');
			--zpadlen;
		}
	}

	/* Digits */
	while (place > 0) 
		dopr_outch (buffer, currlen, maxlen, convert[--place]);
  
	/* Left Justified spaces */
	while (spadlen < 0) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		++spadlen;
	}
}

static LDOUBLE abs_val(LDOUBLE value)
{
	LDOUBLE result = value;

	if (value < 0)
		result = -value;
	
	return result;
}

static LDOUBLE POW10(int exp)
{
	LDOUBLE result = 1;
	
	while (exp) {
		result *= 10;
		exp--;
	}
  
	return result;
}

static LLONG ROUND(LDOUBLE value)
{
	LLONG intpart;

	intpart = (LLONG)value;
	value = value - intpart;
	if (value >= 0.5) intpart++;
	
	return intpart;
}

/* a replacement for modf that doesn't need the math library. Should
   be portable, but slow */
static double my_modf(double x0, double *iptr)
{
	int i;
	long l;
	double x = x0;
	double f = 1.0;

	for (i=0;i<100;i++) {
		l = (long)x;
		if (l <= (x+1) && l >= (x-1)) break;
		x *= 0.1;
		f *= 10.0;
	}

	if (i == 100) {
		/* yikes! the number is beyond what we can handle. What do we do? */
		(*iptr) = 0;
		return 0;
	}

	if (i != 0) {
		double i2;
		double ret;

		ret = my_modf(x0-l*f, &i2);
		(*iptr) = l*f + i2;
		return ret;
	} 

	(*iptr) = l;
	return x - (*iptr);
}


static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
		   LDOUBLE fvalue, int min, int max, int flags)
{
	int signvalue = 0;
	double ufvalue;
	char iconvert[311];
	char fconvert[311];
	int iplace = 0;
	int fplace = 0;
	int padlen = 0; /* amount to pad */
	int zpadlen = 0; 
	int caps = 0;
	int idx;
	double intpart;
	double fracpart;
	double temp;
  
	/* 
	 * AIX manpage says the default is 0, but Solaris says the default
	 * is 6, and sprintf on AIX defaults to 6
	 */
	if (max < 0)
		max = 6;

	ufvalue = abs_val (fvalue);

	if (fvalue < 0) {
		signvalue = '-';
	} else {
		if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
			signvalue = '+';
		} else {
			if (flags & DP_F_SPACE)
				signvalue = ' ';
		}
	}

#if 0
	if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
#endif

#if 0
	 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
#endif

	/* 
	 * Sorry, we only support 16 digits past the decimal because of our 
	 * conversion method
	 */
	if (max > 16)
		max = 16;

	/* We "cheat" by converting the fractional part to integer by
	 * multiplying by a factor of 10
	 */

	temp = ufvalue;
	my_modf(temp, &intpart);

	fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
	
	if (fracpart >= POW10(max)) {
		intpart++;
		fracpart -= POW10(max);
	}

	/* Convert integer part */
	do {
		temp = intpart*0.1;
		my_modf(temp, &intpart);
		idx = (int) ((temp -intpart +0.05)* 10.0);
		/* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
		/* printf ("%llf, %f, %x\n", temp, intpart, idx); */
		iconvert[iplace++] =
			(caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
	} while (intpart && (iplace < 311));
	if (iplace == 311) iplace--;
	iconvert[iplace] = 0;

	/* Convert fractional part */
	if (fracpart)
	{
		do {
			temp = fracpart*0.1;
			my_modf(temp, &fracpart);
			idx = (int) ((temp -fracpart +0.05)* 10.0);
			/* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
			/* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
			fconvert[fplace++] =
			(caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
		} while(fracpart && (fplace < 311));
		if (fplace == 311) fplace--;
	}
	fconvert[fplace] = 0;
  
	/* -1 for decimal point, another -1 if we are printing a sign */
	padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 
	zpadlen = max - fplace;
	if (zpadlen < 0) zpadlen = 0;
	if (padlen < 0) 
		padlen = 0;
	if (flags & DP_F_MINUS) 
		padlen = -padlen; /* Left Justifty */
	
	if ((flags & DP_F_ZERO) && (padlen > 0)) {
		if (signvalue) {
			dopr_outch (buffer, currlen, maxlen, signvalue);
			--padlen;
			signvalue = 0;
		}
		while (padlen > 0) {
			dopr_outch (buffer, currlen, maxlen, '0');
			--padlen;
		}
	}
	while (padlen > 0) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		--padlen;
	}
	if (signvalue) 
		dopr_outch (buffer, currlen, maxlen, signvalue);
	
	while (iplace > 0) 
		dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);

#ifdef DEBUG_SNPRINTF
	printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
#endif

	/*
	 * Decimal point.  This should probably use locale to find the correct
	 * char to print out.
	 */
	if (max > 0) {
		dopr_outch (buffer, currlen, maxlen, '.');
		
		while (zpadlen > 0) {
			dopr_outch (buffer, currlen, maxlen, '0');
			--zpadlen;
		}

		while (fplace > 0) 
			dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
	}

	while (padlen < 0) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		++padlen;
	}
}

static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
{
	if (*currlen < maxlen) {
		buffer[(*currlen)] = c;
	}
	(*currlen)++;
}
#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */

#if !defined(HAVE_VSNPRINTF)
int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
{
	return dopr(str, count, fmt, args);
}
#endif

#if !defined(HAVE_SNPRINTF)
int snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...)
{
	size_t ret;
	va_list ap;

	va_start(ap, fmt);
	ret = vsnprintf(str, count, fmt, ap);
	va_end(ap);
	return ret;
}
#endif