summaryrefslogtreecommitdiffstats
path: root/src/snprintf.c
blob: 3a5d672c621c394b3705c0d5a69b86c0335a2ff1 (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
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
/*
 * NOTE: If you change this file, please merge it into rsync, samba, etc.
 */

/*
 * 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.
 * added 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.
 *
 * Darren Tucker (dtucker@zip.com.au) 2005
 *    Fix bug allowing read overruns of the source string with "%.*s"
 *    Usually harmless unless the read runs outside the process' allocation
 *    (eg if your malloc does guard pages) in which case it will segfault.
 *    From OpenSSH.  Also added test for same.
 *
 * Simo Sorce (idra@samba.org) Jan 2006
 * 
 *    Add support for position independent parameters 
 *    fix fmtstr now it conforms to sprintf wrt min.max
 *
 **************************************************************/

#ifndef NO_CONFIG_H
/* 08/13/2007 EG changed path to config.h to match NRPE distro */
#include "../include/config.h"
#else
#define NULL 0
#endif 

#ifdef TEST_SNPRINTF /* need math library headers for testing */

/* In test mode, we pretend that this system doesn't have any snprintf
 * functions, regardless of what config.h says. */
#  undef HAVE_SNPRINTF
#  undef HAVE_VSNPRINTF
#  undef HAVE_C99_VSNPRINTF
#  undef HAVE_ASPRINTF
#  undef HAVE_VASPRINTF
#  include <math.h>
#endif /* TEST_SNPRINTF */

#ifdef HAVE_STRING_H
#include <string.h>
#endif

#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#include <sys/types.h>
#include <stdarg.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
/* only include stdio.h if we are not re-defining snprintf or vsnprintf */
#include <stdio.h>
 /* make the compiler happy with an empty file */
 void dummy_snprintf(void);
 void dummy_snprintf(void) {} 
#endif /* HAVE_SNPRINTF, etc */

#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

#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

/*
 * 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_CHAR    1
#define DP_C_SHORT   2
#define DP_C_LONG    3
#define DP_C_LDOUBLE 4
#define DP_C_LLONG   5

/* Chunk types */
#define CNK_FMT_STR 0
#define CNK_INT     1
#define CNK_OCTAL   2
#define CNK_UINT    3
#define CNK_HEX     4
#define CNK_FLOAT   5
#define CNK_CHAR    6
#define CNK_STRING  7
#define CNK_PTR     8
#define CNK_NUM     9
#define CNK_PRCNT   10

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

/* yes this really must be a ||. Don't muck with this (tridge) */
#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)

struct pr_chunk {
	int type; /* chunk type */
	int num; /* parameter number */
	int min; 
	int max;
	int flags;
	int cflags;
	int start;
	int len;
	LLONG value;
	LDOUBLE fvalue;
	char *strvalue;
	void *pnum;
	struct pr_chunk *min_star;
	struct pr_chunk *max_star;
	struct pr_chunk *next;
};

struct pr_chunk_x {
	struct pr_chunk **chunks;
	int num;
};

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,
		    long 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 struct pr_chunk *new_chunk(void);
static int add_cnk_list_entry(struct pr_chunk_x **list,
				int max_num, struct pr_chunk *chunk);

static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
{
	char ch;
	int state;
	int pflag;
	int pnum;
	int pfirst;
	size_t currlen;
	va_list args;
	const char *base;
	struct pr_chunk *chunks = NULL;
	struct pr_chunk *cnk = NULL;
	struct pr_chunk_x *clist = NULL;
	int max_pos;
	size_t ret = (size_t)-1;

	VA_COPY(args, args_in);

	state = DP_S_DEFAULT;
	pfirst = 1;
	pflag = 0;
	pnum = 0;

	max_pos = 0;
	base = format;
	ch = *format++;
	
	/* retrieve the string structure as chunks */
	while (state != DP_S_DONE) {
		if (ch == '\0') 
			state = DP_S_DONE;

		switch(state) {
		case DP_S_DEFAULT:
			
			if (cnk) {
				cnk->next = new_chunk();
				cnk = cnk->next;
			} else {
				cnk = new_chunk();
			}
			if (!cnk) goto done;
			if (!chunks) chunks = cnk;
			
			if (ch == '%') {
				state = DP_S_FLAGS;
				ch = *format++;
			} else {
				cnk->type = CNK_FMT_STR;
				cnk->start = format - base -1;
				while ((ch != '\0') && (ch != '%')) ch = *format++;
				cnk->len = format - base - cnk->start -1;
			}
			break;
		case DP_S_FLAGS:
			switch (ch) {
			case '-':
				cnk->flags |= DP_F_MINUS;
				ch = *format++;
				break;
			case '+':
				cnk->flags |= DP_F_PLUS;
				ch = *format++;
				break;
			case ' ':
				cnk->flags |= DP_F_SPACE;
				ch = *format++;
				break;
			case '#':
				cnk->flags |= DP_F_NUM;
				ch = *format++;
				break;
			case '0':
				cnk->flags |= DP_F_ZERO;
				ch = *format++;
				break;
			case 'I':
				/* internationalization not supported yet */
				ch = *format++;
				break;
			default:
				state = DP_S_MIN;
				break;
			}
			break;
		case DP_S_MIN:
			if (isdigit((unsigned char)ch)) {
				cnk->min = 10 * cnk->min + char_to_int (ch);
				ch = *format++;
			} else if (ch == '$') {
				if (!pfirst && !pflag) {
					/* parameters must be all positioned or none */
					goto done;
				}
				if (pfirst) {
					pfirst = 0;
					pflag = 1;
				}
				if (cnk->min == 0) /* what ?? */
					goto done;
				cnk->num = cnk->min;
				cnk->min = 0;
				ch = *format++;
			} else if (ch == '*') {
				if (pfirst) pfirst = 0;
				cnk->min_star = new_chunk();
				if (!cnk->min_star) /* out of memory :-( */
					goto done;
				cnk->min_star->type = CNK_INT;
				if (pflag) {
					int num;
					ch = *format++;
					if (!isdigit((unsigned char)ch)) {
						/* parameters must be all positioned or none */
						goto done;
					}
					for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
						num = 10 * num + char_to_int(ch);
					}
					cnk->min_star->num = num;
					if (ch != '$') /* what ?? */
						goto done;
				} else {
					cnk->min_star->num = ++pnum;
				}
				max_pos = add_cnk_list_entry(&clist, max_pos, cnk->min_star);
				if (max_pos == 0) /* out of memory :-( */
					goto done;
				ch = *format++;
				state = DP_S_DOT;
			} else {
				if (pfirst) pfirst = 0;
				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 (cnk->max < 0)
					cnk->max = 0;
				cnk->max = 10 * cnk->max + char_to_int (ch);
				ch = *format++;
			} else if (ch == '$') {
				if (!pfirst && !pflag) {
					/* parameters must be all positioned or none */
					goto done;
				}
				if (cnk->max <= 0) /* what ?? */
					goto done;
				cnk->num = cnk->max;
				cnk->max = -1;
				ch = *format++;
			} else if (ch == '*') {
				cnk->max_star = new_chunk();
				if (!cnk->max_star) /* out of memory :-( */
					goto done;
				cnk->max_star->type = CNK_INT;
				if (pflag) {
					int num;
					ch = *format++;
					if (!isdigit((unsigned char)ch)) {
						/* parameters must be all positioned or none */
						goto done;
					}
					for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
						num = 10 * num + char_to_int(ch);
					}
					cnk->max_star->num = num;
					if (ch != '$') /* what ?? */
						goto done;
				} else {
					cnk->max_star->num = ++pnum;
				}
				max_pos = add_cnk_list_entry(&clist, max_pos, cnk->max_star);
				if (max_pos == 0) /* out of memory :-( */
					goto done;

				ch = *format++;
				state = DP_S_MOD;
			} else {
				state = DP_S_MOD;
			}
			break;
		case DP_S_MOD:
			switch (ch) {
			case 'h':
				cnk->cflags = DP_C_SHORT;
				ch = *format++;
				if (ch == 'h') {
					cnk->cflags = DP_C_CHAR;
					ch = *format++;
				}
				break;
			case 'l':
				cnk->cflags = DP_C_LONG;
				ch = *format++;
				if (ch == 'l') {	/* It's a long long */
					cnk->cflags = DP_C_LLONG;
					ch = *format++;
				}
				break;
			case 'L':
				cnk->cflags = DP_C_LDOUBLE;
				ch = *format++;
				break;
			default:
				break;
			}
			state = DP_S_CONV;
			break;
		case DP_S_CONV:
			if (cnk->num == 0) cnk->num = ++pnum;
			max_pos = add_cnk_list_entry(&clist, max_pos, cnk);
			if (max_pos == 0) /* out of memory :-( */
				goto done;
			
			switch (ch) {
			case 'd':
			case 'i':
				cnk->type = CNK_INT;
				break;
			case 'o':
				cnk->type = CNK_OCTAL;
				cnk->flags |= DP_F_UNSIGNED;
				break;
			case 'u':
				cnk->type = CNK_UINT;
				cnk->flags |= DP_F_UNSIGNED;
				break;
			case 'X':
				cnk->flags |= DP_F_UP;
			case 'x':
				cnk->type = CNK_HEX;
				cnk->flags |= DP_F_UNSIGNED;
				break;
			case 'A':
				/* hex float not supported yet */
			case 'E':
			case 'G':
			case 'F':
				cnk->flags |= DP_F_UP;
			case 'a':
				/* hex float not supported yet */
			case 'e':
			case 'f':
			case 'g':
				cnk->type = CNK_FLOAT;
				break;
			case 'c':
				cnk->type = CNK_CHAR;
				break;
			case 's':
				cnk->type = CNK_STRING;
				break;
			case 'p':
				cnk->type = CNK_PTR;
				break;
			case 'n':
				cnk->type = CNK_NUM;
				break;
			case '%':
				cnk->type = CNK_PRCNT;
				break;
			default:
				/* Unknown, bail out*/
				goto done;
			}
			ch = *format++;
			state = DP_S_DEFAULT;
			break;
		case DP_S_DONE:
			break;
		default:
			/* hmm? */
			break; /* some picky compilers need this */
		}
	}

	/* retieve the format arguments */
	for (pnum = 0; pnum < max_pos; pnum++) {
		int i;

		if (clist[pnum].num == 0) {
			/* ignoring a parameter should not be permitted
			 * all parameters must be matched at least once
			 * BUT seem some system ignore this rule ...
			 * at least my glibc based system does --SSS
			 */
#ifdef DEBUG_SNPRINTF
			printf("parameter at position %d not used\n", pnum+1);
#endif
			/* eat the parameter */
			va_arg (args, int);
			continue;
		}
		for (i = 1; i < clist[pnum].num; i++) {
			if (clist[pnum].chunks[0]->type != clist[pnum].chunks[i]->type) {
				/* nooo noo no!
				 * all the references to a parameter
				 * must be of the same type
				 */
				goto done;
			}
		}
		cnk = clist[pnum].chunks[0];
		switch (cnk->type) {
		case CNK_INT:
			if (cnk->cflags == DP_C_SHORT) 
				cnk->value = va_arg (args, int);
			else if (cnk->cflags == DP_C_LONG)
				cnk->value = va_arg (args, long int);
			else if (cnk->cflags == DP_C_LLONG)
				cnk->value = va_arg (args, LLONG);
			else
				cnk->value = va_arg (args, int);

			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->value = cnk->value;
			}
			break;

		case CNK_OCTAL:
		case CNK_UINT:
		case CNK_HEX:
			if (cnk->cflags == DP_C_SHORT)
				cnk->value = va_arg (args, unsigned int);
			else if (cnk->cflags == DP_C_LONG)
				cnk->value = (long)va_arg (args, unsigned long int);
			else if (cnk->cflags == DP_C_LLONG)
				cnk->value = (LLONG)va_arg (args, unsigned LLONG);
			else
				cnk->value = (long)va_arg (args, unsigned int);

			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->value = cnk->value;
			}
			break;

		case CNK_FLOAT:
			if (cnk->cflags == DP_C_LDOUBLE)
				cnk->fvalue = va_arg (args, LDOUBLE);
			else
				cnk->fvalue = va_arg (args, double);

			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->fvalue = cnk->fvalue;
			}
			break;

		case CNK_CHAR:
			cnk->value = va_arg (args, int);

			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->value = cnk->value;
			}
			break;

		case CNK_STRING:
			cnk->strvalue = va_arg (args, char *);
			if (!cnk->strvalue) cnk->strvalue = "(NULL)";

			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->strvalue = cnk->strvalue;
			}
			break;

		case CNK_PTR:
			cnk->strvalue = va_arg (args, void *);
			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->strvalue = cnk->strvalue;
			}
			break;

		case CNK_NUM:
			if (cnk->cflags == DP_C_CHAR)
				cnk->pnum = va_arg (args, char *);
			else if (cnk->cflags == DP_C_SHORT)
				cnk->pnum = va_arg (args, short int *);
			else if (cnk->cflags == DP_C_LONG)
				cnk->pnum = va_arg (args, long int *);
			else if (cnk->cflags == DP_C_LLONG)
				cnk->pnum = va_arg (args, LLONG *);
			else
				cnk->pnum = va_arg (args, int *);

			for (i = 1; i < clist[pnum].num; i++) {
				clist[pnum].chunks[i]->pnum = cnk->pnum;
			}
			break;

		case CNK_PRCNT:
			break;

		default:
			/* what ?? */
			goto done;
		}
	}
	/* print out the actual string from chunks */
	currlen = 0;
	cnk = chunks;
	while (cnk) {
		int len, min, max;

		if (cnk->min_star) min = cnk->min_star->value;
		else min = cnk->min;
		if (cnk->max_star) max = cnk->max_star->value;
		else max = cnk->max;

		switch (cnk->type) {

		case CNK_FMT_STR:
			if (maxlen != 0 && maxlen > currlen) {
				if (maxlen > (currlen + cnk->len)) len = cnk->len;
				else len = maxlen - currlen;

				memcpy(&(buffer[currlen]), &(base[cnk->start]), len);
			}
			currlen += cnk->len;
				
			break;

		case CNK_INT:
		case CNK_UINT:
			fmtint (buffer, &currlen, maxlen, cnk->value, 10, min, max, cnk->flags);
			break;

		case CNK_OCTAL:
			fmtint (buffer, &currlen, maxlen, cnk->value, 8, min, max, cnk->flags);
			break;

		case CNK_HEX:
			fmtint (buffer, &currlen, maxlen, cnk->value, 16, min, max, cnk->flags);
			break;

		case CNK_FLOAT:
			fmtfp (buffer, &currlen, maxlen, cnk->fvalue, min, max, cnk->flags);
			break;

		case CNK_CHAR:
			dopr_outch (buffer, &currlen, maxlen, cnk->value);
			break;

		case CNK_STRING:
			if (max == -1) {
				max = strlen(cnk->strvalue);
			}
			fmtstr (buffer, &currlen, maxlen, cnk->strvalue, cnk->flags, min, max);
			break;

		case CNK_PTR:
			fmtint (buffer, &currlen, maxlen, (long)(cnk->strvalue), 16, min, max, cnk->flags);
			break;

		case CNK_NUM:
			if (cnk->cflags == DP_C_CHAR)
				*((char *)(cnk->pnum)) = (char)currlen;
			else if (cnk->cflags == DP_C_SHORT)
				*((short int *)(cnk->pnum)) = (short int)currlen;
			else if (cnk->cflags == DP_C_LONG)
				*((long int *)(cnk->pnum)) = (long int)currlen;
			else if (cnk->cflags == DP_C_LLONG)
				*((LLONG *)(cnk->pnum)) = (LLONG)currlen;
			else
				*((int *)(cnk->pnum)) = (int)currlen;
			break;

		case CNK_PRCNT:
			dopr_outch (buffer, &currlen, maxlen, '%');
			break;

		default:
			/* what ?? */
			goto done;
		}
		cnk = cnk->next;
	}
	if (maxlen != 0) {
		if (currlen < maxlen - 1) 
			buffer[currlen] = '\0';
		else if (maxlen > 0) 
			buffer[maxlen - 1] = '\0';
	}
	ret = currlen;

done:
	while (chunks) {
		cnk = chunks->next;
		free(chunks);
		chunks = cnk;
	}
	if (clist) {
		for (pnum = 0; pnum < max_pos; pnum++) {
			if (clist[pnum].chunks) free(clist[pnum].chunks);
		}
		free(clist);
	}
	return ret;
}

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) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		--padlen;
	}
	while (*value && (cnt < max)) {
		dopr_outch (buffer, currlen, maxlen, *value++);
		++cnt;
	}
	while (padlen < 0) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		++padlen;
	}
}

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

static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
		    long value, int base, int min, int max, int flags)
{
	int signvalue = 0;
	unsigned long 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 Justify */

#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 9 digits past the decimal because of our 
	 * conversion method
	 */
	if (max > 9)
		max = 9;

	/* 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 Justify */
	
	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)++;
}

static struct pr_chunk *new_chunk(void) {
	struct pr_chunk *new_c = (struct pr_chunk *)malloc(sizeof(struct pr_chunk));

	if ( !new_c ) 
		return NULL;

	new_c->type = 0;
	new_c->num = 0;
	new_c->min = 0;
	new_c->min_star = NULL;
	new_c->max = -1;
	new_c->max_star = NULL;
	new_c->flags = 0;
	new_c->cflags = 0;
	new_c->start = 0;
	new_c->len = 0;
	new_c->value = 0;
	new_c->fvalue = 0;
	new_c->strvalue = NULL;
	new_c->pnum = NULL;
	new_c->next = NULL;

	return new_c;
}

static int add_cnk_list_entry(struct pr_chunk_x **list,
				int max_num, struct pr_chunk *chunk) {
	struct pr_chunk_x *l;
	struct pr_chunk **c;
	int max;
	int cnum;
	int i, pos;

	if (chunk->num > max_num) {
		max = chunk->num;
	
		if (*list == NULL) {
			l = (struct pr_chunk_x *)malloc(sizeof(struct pr_chunk_x) * max);
			pos = 0;
		} else {
			l = (struct pr_chunk_x *)realloc(*list, sizeof(struct pr_chunk_x) * max);
			pos = max_num;
		}
		if (l == NULL) {
			for (i = 0; i < max; i++) {
				if ((*list)[i].chunks) free((*list)[i].chunks);
			}
			return 0;
		}
		for (i = pos; i < max; i++) {
			l[i].chunks = NULL;
			l[i].num = 0;
		}
	} else {
		l = *list;
		max = max_num;
	}

	i = chunk->num - 1;
	cnum = l[i].num + 1;
	if (l[i].chunks == NULL) {
		c = (struct pr_chunk **)malloc(sizeof(struct pr_chunk *) * cnum); 
	} else {
		c = (struct pr_chunk **)realloc(l[i].chunks, sizeof(struct pr_chunk *) * cnum);
	}
	if (c == NULL) {
		for (i = 0; i < max; i++) {
			if (l[i].chunks) free(l[i].chunks);
		}
		return 0;
	}
	c[l[i].num] = chunk;
	l[i].chunks = c;
	l[i].num = cnum;

	*list = l;
	return max;
}

 int smb_vsnprintf (char *str, size_t count, const char *fmt, va_list args)
{
	return dopr(str, count, fmt, args);
}
#define vsnprintf smb_vsnprintf
#endif

/* yes this really must be a ||. Don't muck with this (tridge)
 *
 * The logic for these two is that we need our own definition if the
 * OS *either* has no definition of *sprintf, or if it does have one
 * that doesn't work properly according to the autoconf test.
 */
#if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
int smb_snprintf(char *str,size_t count,const char *fmt,...)
{
	size_t ret;
	va_list ap;
    
	va_start(ap, fmt);
	ret = vsnprintf(str, count, fmt, ap);
	va_end(ap);
	return ret;
}
#define snprintf smb_snprintf
#endif

#endif 

#ifndef HAVE_VASPRINTF
 int vasprintf(char **ptr, const char *format, va_list ap)
{
	int ret;
	va_list ap2;

	VA_COPY(ap2, ap);
	
	ret = vsnprintf(NULL, 0, format, ap2);
	if (ret <= 0) return ret;

	(*ptr) = (char *)malloc(ret+1);
	if (!*ptr) return -1;

	VA_COPY(ap2, ap);

	ret = vsnprintf(*ptr, ret+1, format, ap2);

	return ret;
}
#endif


#ifndef HAVE_ASPRINTF
 int asprintf(char **ptr, const char *format, ...)
{
	va_list ap;
	int ret;
	
	*ptr = NULL;
	va_start(ap, format);
	ret = vasprintf(ptr, format, ap);
	va_end(ap);

	return ret;
}
#endif

#ifdef TEST_SNPRINTF

 int sprintf(char *str,const char *fmt,...);

 int main (void)
{
	char buf1[1024];
	char buf2[1024];
	char *buf3;
	char *fp_fmt[] = {
		"%1.1f",
		"%-1.5f",
		"%1.5f",
		"%123.9f",
		"%10.5f",
		"% 10.5f",
		"%+22.9f",
		"%+4.9f",
		"%01.3f",
		"%4f",
		"%3.1f",
		"%3.2f",
		"%.0f",
		"%f",
		"%-8.8f",
		"%-9.9f",
		NULL
	};
	double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 203.9, 0.96, 0.996, 
			     0.9996, 1.996, 4.136, 5.030201, 0.00205,
			     /* END LIST */ 0};
	char *int_fmt[] = {
		"%-1.5d",
		"%1.5d",
		"%123.9d",
		"%5.5d",
		"%10.5d",
		"% 10.5d",
		"%+22.33d",
		"%01.3d",
		"%4d",
		"%d",
		NULL
	};
	long int_nums[] = { -1, 134, 91340, 341, 0203, 0, 1234567890};
	char *str_fmt[] = {
		"%10.5s",
		"%-10.5s",
		"%5.10s",
		"%-5.10s",
		"%10.1s",
		"%0.10s",
		"%10.0s",
		"%1.10s",
		"%s",
		"%.1s",
		"%.10s",
		"%10s",
		NULL
	};
	char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
	int x, y;
	int fail = 0;
	int num = 0;
	int l1, l2;

	printf ("Testing snprintf format codes against system sprintf...\n");

	for (x = 0; fp_fmt[x] ; x++) {
		for (y = 0; fp_nums[y] != 0 ; y++) {
			buf1[0] = buf2[0] = '\0';
			l1 = snprintf(NULL, 0, fp_fmt[x], fp_nums[y]);
			l2 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
			sprintf (buf2, fp_fmt[x], fp_nums[y]);
			buf1[1023] = buf1[1023] = '\0';
			if (strcmp (buf1, buf2) || (l1 != l2)) {
				printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
				       fp_fmt[x], l1, buf1, l2, buf2);
				fail++;
			}
			num++;
		}
	}

	for (x = 0; int_fmt[x] ; x++) {
		for (y = 0; int_nums[y] != 0 ; y++) {
			buf1[0] = buf2[0] = '\0';
			l1 = snprintf(NULL, 0, int_fmt[x], int_nums[y]);
			l2 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
			sprintf (buf2, int_fmt[x], int_nums[y]);
			buf1[1023] = buf1[1023] = '\0';
			if (strcmp (buf1, buf2) || (l1 != l2)) {
				printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
				       int_fmt[x], l1, buf1, l2, buf2);
				fail++;
			}
			num++;
		}
	}

	for (x = 0; str_fmt[x] ; x++) {
		for (y = 0; str_vals[y] != 0 ; y++) {
			buf1[0] = buf2[0] = '\0';
			l1 = snprintf(NULL, 0, str_fmt[x], str_vals[y]);
			l2 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
			sprintf (buf2, str_fmt[x], str_vals[y]);
			buf1[1023] = buf1[1023] = '\0';
			if (strcmp (buf1, buf2) || (l1 != l2)) {
				printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
				       str_fmt[x], l1, buf1, l2, buf2);
				fail++;
			}
			num++;
		}
	}

#define BUFSZ 2048

	buf1[0] = buf2[0] = '\0';
	if ((buf3 = malloc(BUFSZ)) == NULL) {
		fail++;
	} else {
		num++;
		memset(buf3, 'a', BUFSZ);
		snprintf(buf1, sizeof(buf1), "%.*s", 1, buf3);
		buf1[1023] = '\0';
		if (strcmp(buf1, "a") != 0) {
			printf("length limit buf1 '%s' expected 'a'\n", buf1);
			fail++;
		}
        }

	buf1[0] = buf2[0] = '\0';
	l1 = snprintf(buf1, sizeof(buf1), "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
	l2 = sprintf(buf2, "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
	buf1[1023] = buf1[1023] = '\0';
	if (strcmp(buf1, buf2) || (l1 != l2)) {
		printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
				"%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
		fail++;
	}

	buf1[0] = buf2[0] = '\0';
	l1 = snprintf(buf1, sizeof(buf1), "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
	l2 = sprintf(buf2, "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
	buf1[1023] = buf1[1023] = '\0';
	if (strcmp(buf1, buf2)) {
		printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
				"%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
		fail++;
	}
#if 0
	buf1[0] = buf2[0] = '\0';
	l1 = snprintf(buf1, sizeof(buf1), "%lld", (LLONG)1234567890);
	l2 = sprintf(buf2, "%lld", (LLONG)1234567890);
	buf1[1023] = buf1[1023] = '\0';
	if (strcmp(buf1, buf2)) {
		printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
				"%lld", l1, buf1, l2, buf2);
		fail++;
	}

	buf1[0] = buf2[0] = '\0';
	l1 = snprintf(buf1, sizeof(buf1), "%Lf", (LDOUBLE)890.1234567890123);
	l2 = sprintf(buf2, "%Lf", (LDOUBLE)890.1234567890123);
	buf1[1023] = buf1[1023] = '\0';
	if (strcmp(buf1, buf2)) {
		printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
				"%Lf", l1, buf1, l2, buf2);
		fail++;
	}
#endif
	printf ("%d tests failed out of %d.\n", fail, num);

	printf("seeing how many digits we support\n");
	{
		double v0 = 0.12345678901234567890123456789012345678901;
		for (x=0; x<100; x++) {
			double p = pow(10, x); 
			double r = v0*p;
			snprintf(buf1, sizeof(buf1), "%1.1f", r);
			sprintf(buf2,                "%1.1f", r);
			if (strcmp(buf1, buf2)) {
				printf("we seem to support %d digits\n", x-1);
				break;
			}
		}
	}

	return 0;
}
#endif /* TEST_SNPRINTF */