1 /**************************************************************
2  * Original:
3  * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
4  * A bombproof version of doprnt (dopr) included.
5  * Sigh.  This sort of thing is always nasty do deal with.  Note that
6  * the version here does not include floating point...
7  *
8  * snprintf() is used instead of sprintf() as it does limit checks
9  * for string length.  This covers a nasty loophole.
10  *
11  * The other functions are there to prevent NULL pointers from
12  * causing nast effects.
13  *
14  * More Recently:
15  *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
16  *  This was ugly.  It is still ugly.  I opted out of floating point
17  *  numbers, but the formatter understands just about everything
18  *  from the normal C string format, at least as far as I can tell from
19  *  the Solaris 2.5 printf(3S) man page.
20  *
21  *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
22  *    Ok, added some minimal floating point support, which means this
23  *    probably requires libm on most operating systems.  Don't yet
24  *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
25  *    was pretty badly broken, it just wasn't being exercised in ways
26  *    which showed it, so that's been fixed.  Also, formated the code
27  *    to mutt conventions, and removed dead code left over from the
28  *    original.  Also, there is now a builtin-test, just compile with:
29  *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
30  *    and run snprintf for results.
31  *
32  *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
33  *    The PGP code was using unsigned hexadecimal formats.
34  *    Unfortunately, unsigned formats simply didn't work.
35  *
36  *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
37  *    The original code assumed that both snprintf() and vsnprintf() were
38  *    missing.  Some systems only have snprintf() but not vsnprintf(), so
39  *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
40  *
41  *  Ben Lindstrom <mouring@pconline.com> 09/27/00 for OpenSSH
42  *    Welcome to the world of %lld and %qd support.  With other
43  *    long long support.  This is needed for sftp-server to work
44  *    right.
45  **************************************************************/
46 
47 #include "config.h"
48 
49 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
50 
51 #include <string.h>
52 # include <ctype.h>
53 #include <sys/types.h>
54 
55 /* Define this as a fall through, HAVE_STDARG_H is probably already set */
56 
57 #define HAVE_VARARGS_H
58 
59 /* varargs declarations: */
60 
61 #if defined(HAVE_STDARG_H)
62 # include <stdarg.h>
63 # define HAVE_STDARGS    /* let's hope that works everywhere (mj) */
64 # define VA_LOCAL_DECL   va_list ap
65 # define VA_START(f)     va_start(ap, f)
66 # define VA_SHIFT(v,t)  ;   /* no-op for ANSI */
67 # define VA_END          va_end(ap)
68 #else
69 # if defined(HAVE_VARARGS_H)
70 #  include <varargs.h>
71 #  undef HAVE_STDARGS
72 #  define VA_LOCAL_DECL   va_list ap
73 #  define VA_START(f)     va_start(ap)      /* f is ignored! */
74 #  define VA_SHIFT(v,t) v = va_arg(ap,t)
75 #  define VA_END        va_end(ap)
76 # else
77 /*XX ** NO VARARGS ** XX*/
78 # endif
79 #endif
80 
81 /*int snprintf (char *str, size_t count, const char *fmt, ...);*/
82 /*int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);*/
83 
84 static void dopr (char *buffer, size_t maxlen, const char *format,
85                   va_list args);
86 static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
87 		    char *value, int flags, int min, int max);
88 static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
89 		    long value, int base, int min, int max, int flags);
90 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
91 		   long double fvalue, int min, int max, int flags);
92 static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c );
93 
94 /*
95  * dopr(): poor man's version of doprintf
96  */
97 
98 /* format read states */
99 #define DP_S_DEFAULT 0
100 #define DP_S_FLAGS   1
101 #define DP_S_MIN     2
102 #define DP_S_DOT     3
103 #define DP_S_MAX     4
104 #define DP_S_MOD     5
105 #define DP_S_CONV    6
106 #define DP_S_DONE    7
107 
108 /* format flags - Bits */
109 #define DP_F_MINUS 	(1 << 0)
110 #define DP_F_PLUS  	(1 << 1)
111 #define DP_F_SPACE 	(1 << 2)
112 #define DP_F_NUM   	(1 << 3)
113 #define DP_F_ZERO  	(1 << 4)
114 #define DP_F_UP    	(1 << 5)
115 #define DP_F_UNSIGNED 	(1 << 6)
116 
117 /* Conversion Flags */
118 #define DP_C_SHORT     1
119 #define DP_C_LONG      2
120 #define DP_C_LDOUBLE   3
121 #define DP_C_LONG_LONG 4
122 
123 #define char_to_int(p) (p - '0')
124 #ifndef MAX
125 # define MAX(p,q) ((p >= q) ? p : q)
126 #endif
127 
128 static void dopr (char *buffer, size_t maxlen, const char *format, va_list args)
129 {
130   char ch;
131   long value;
132   long double fvalue;
133   char *strvalue;
134   int min;
135   int max;
136   int state;
137   int flags;
138   int cflags;
139   size_t currlen;
140 
141   state = DP_S_DEFAULT;
142   currlen = flags = cflags = min = 0;
143   max = -1;
144   ch = *format++;
145 
146   while (state != DP_S_DONE)
147   {
148     if ((ch == '\0') || (currlen >= maxlen))
149       state = DP_S_DONE;
150 
151     switch(state)
152     {
153     case DP_S_DEFAULT:
154       if (ch == '%')
155 	state = DP_S_FLAGS;
156       else
157 	dopr_outch (buffer, &currlen, maxlen, ch);
158       ch = *format++;
159       break;
160     case DP_S_FLAGS:
161       switch (ch)
162       {
163       case '-':
164 	flags |= DP_F_MINUS;
165         ch = *format++;
166 	break;
167       case '+':
168 	flags |= DP_F_PLUS;
169         ch = *format++;
170 	break;
171       case ' ':
172 	flags |= DP_F_SPACE;
173         ch = *format++;
174 	break;
175       case '#':
176 	flags |= DP_F_NUM;
177         ch = *format++;
178 	break;
179       case '0':
180 	flags |= DP_F_ZERO;
181         ch = *format++;
182 	break;
183       default:
184 	state = DP_S_MIN;
185 	break;
186       }
187       break;
188     case DP_S_MIN:
189       if (isdigit((unsigned char)ch))
190       {
191 	min = 10*min + char_to_int (ch);
192 	ch = *format++;
193       }
194       else if (ch == '*')
195       {
196 	min = va_arg (args, int);
197 	ch = *format++;
198 	state = DP_S_DOT;
199       }
200       else
201 	state = DP_S_DOT;
202       break;
203     case DP_S_DOT:
204       if (ch == '.')
205       {
206 	state = DP_S_MAX;
207 	ch = *format++;
208       }
209       else
210 	state = DP_S_MOD;
211       break;
212     case DP_S_MAX:
213       if (isdigit((unsigned char)ch))
214       {
215 	if (max < 0)
216 	  max = 0;
217 	max = 10*max + char_to_int (ch);
218 	ch = *format++;
219       }
220       else if (ch == '*')
221       {
222 	max = va_arg (args, int);
223 	ch = *format++;
224 	state = DP_S_MOD;
225       }
226       else
227 	state = DP_S_MOD;
228       break;
229     case DP_S_MOD:
230       switch (ch)
231       {
232       case 'h':
233 	cflags = DP_C_SHORT;
234 	ch = *format++;
235 	break;
236       case 'l':
237 	cflags = DP_C_LONG;
238 	ch = *format++;
239         if (ch == 'l') {
240            cflags = DP_C_LONG_LONG;
241            ch = *format++;
242         }
243 	break;
244       case 'q':
245 	cflags = DP_C_LONG_LONG;
246         ch = *format++;
247         break;
248       case 'L':
249 	cflags = DP_C_LDOUBLE;
250 	ch = *format++;
251 	break;
252       default:
253 	break;
254       }
255       state = DP_S_CONV;
256       break;
257     case DP_S_CONV:
258       switch (ch)
259       {
260       case 'd':
261       case 'i':
262 	if (cflags == DP_C_SHORT)
263 	  value = va_arg (args, int);
264 	else if (cflags == DP_C_LONG)
265 	  value = va_arg (args, long int);
266 	else if (cflags == DP_C_LONG_LONG)
267 	  value = va_arg (args, long long);
268 	else
269 	  value = va_arg (args, int);
270 	fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
271 	break;
272       case 'o':
273 	flags |= DP_F_UNSIGNED;
274 	if (cflags == DP_C_SHORT)
275 	  value = va_arg (args, unsigned int);
276 	else if (cflags == DP_C_LONG)
277 	  value = va_arg (args, unsigned long int);
278 	else if (cflags == DP_C_LONG_LONG)
279 	  value = va_arg (args, unsigned long long);
280 	else
281 	  value = va_arg (args, unsigned int);
282 	fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
283 	break;
284       case 'u':
285 	flags |= DP_F_UNSIGNED;
286 	if (cflags == DP_C_SHORT)
287 	  value = va_arg (args, unsigned int);
288 	else if (cflags == DP_C_LONG)
289 	  value = va_arg (args, unsigned long int);
290 	else if (cflags == DP_C_LONG_LONG)
291 	  value = va_arg (args, unsigned long long);
292 	else
293 	  value = va_arg (args, unsigned int);
294 	fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
295 	break;
296       case 'X':
297 	flags |= DP_F_UP;
298       case 'x':
299 	flags |= DP_F_UNSIGNED;
300 	if (cflags == DP_C_SHORT)
301 	  value = va_arg (args, unsigned int);
302 	else if (cflags == DP_C_LONG)
303 	  value = va_arg (args, unsigned long int);
304 	else if (cflags == DP_C_LONG_LONG)
305 	  value = va_arg (args, unsigned long long);
306 	else
307 	  value = va_arg (args, unsigned int);
308 	fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
309 	break;
310       case 'f':
311 	if (cflags == DP_C_LDOUBLE)
312 	  fvalue = va_arg (args, long double);
313 	else
314 	  fvalue = va_arg (args, double);
315 	/* um, floating point? */
316 	fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
317 	break;
318       case 'E':
319 	flags |= DP_F_UP;
320       case 'e':
321 	if (cflags == DP_C_LDOUBLE)
322 	  fvalue = va_arg (args, long double);
323 	else
324 	  fvalue = va_arg (args, double);
325 	break;
326       case 'G':
327 	flags |= DP_F_UP;
328       case 'g':
329 	if (cflags == DP_C_LDOUBLE)
330 	  fvalue = va_arg (args, long double);
331 	else
332 	  fvalue = va_arg (args, double);
333 	break;
334       case 'c':
335 	dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
336 	break;
337       case 's':
338 	strvalue = va_arg (args, char *);
339 	if (max < 0)
340 	  max = maxlen; /* ie, no max */
341 	fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
342 	break;
343       case 'p':
344 	strvalue = va_arg (args, void *);
345 	fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
346 	break;
347       case 'n':
348 	if (cflags == DP_C_SHORT)
349 	{
350 	  short int *num;
351 	  num = va_arg (args, short int *);
352 	  *num = currlen;
353         }
354 	else if (cflags == DP_C_LONG)
355 	{
356 	  long int *num;
357 	  num = va_arg (args, long int *);
358 	  *num = currlen;
359         }
360 	else if (cflags == DP_C_LONG_LONG)
361         {
362 	  long long *num;
363 	  num = va_arg (args, long long *);
364           *num = currlen;
365         }
366 	else
367 	{
368 	  int *num;
369 	  num = va_arg (args, int *);
370 	  *num = currlen;
371         }
372 	break;
373       case '%':
374 	dopr_outch (buffer, &currlen, maxlen, ch);
375 	break;
376       case 'w':
377 	/* not supported yet, treat as next char */
378 	ch = *format++;
379 	break;
380       default:
381 	/* Unknown, skip */
382 	break;
383       }
384       ch = *format++;
385       state = DP_S_DEFAULT;
386       flags = cflags = min = 0;
387       max = -1;
388       break;
389     case DP_S_DONE:
390       break;
391     default:
392       /* hmm? */
393       break; /* some picky compilers need this */
394     }
395   }
396   if (currlen < maxlen - 1)
397     buffer[currlen] = '\0';
398   else
399     buffer[maxlen - 1] = '\0';
400 }
401 
402 static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
403 		    char *value, int flags, int min, int max)
404 {
405   int padlen, strln;     /* amount to pad */
406   int cnt = 0;
407 
408   if (value == 0)
409   {
410     value = "<NULL>";
411   }
412 
413   for (strln = 0; value[strln]; ++strln); /* strlen */
414   padlen = min - strln;
415   if (padlen < 0)
416     padlen = 0;
417   if (flags & DP_F_MINUS)
418     padlen = -padlen; /* Left Justify */
419 
420   while ((padlen > 0) && (cnt < max))
421   {
422     dopr_outch (buffer, currlen, maxlen, ' ');
423     --padlen;
424     ++cnt;
425   }
426   while (*value && (cnt < max))
427   {
428     dopr_outch (buffer, currlen, maxlen, *value++);
429     ++cnt;
430   }
431   while ((padlen < 0) && (cnt < max))
432   {
433     dopr_outch (buffer, currlen, maxlen, ' ');
434     ++padlen;
435     ++cnt;
436   }
437 }
438 
439 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
440 
441 static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
442 		    long value, int base, int min, int max, int flags)
443 {
444   int signvalue = 0;
445   unsigned long uvalue;
446   char convert[20];
447   int place = 0;
448   int spadlen = 0; /* amount to space pad */
449   int zpadlen = 0; /* amount to zero pad */
450   int caps = 0;
451 
452   if (max < 0)
453     max = 0;
454 
455   uvalue = value;
456 
457   if(!(flags & DP_F_UNSIGNED))
458   {
459     if( value < 0 ) {
460       signvalue = '-';
461       uvalue = -value;
462     }
463     else
464       if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
465 	signvalue = '+';
466     else
467       if (flags & DP_F_SPACE)
468 	signvalue = ' ';
469   }
470 
471   if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
472 
473   do {
474     convert[place++] =
475       (caps? "0123456789ABCDEF":"0123456789abcdef")
476       [uvalue % (unsigned)base  ];
477     uvalue = (uvalue / (unsigned)base );
478   } while(uvalue && (place < 20));
479   if (place == 20) place--;
480   convert[place] = 0;
481 
482   zpadlen = max - place;
483   spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
484   if (zpadlen < 0) zpadlen = 0;
485   if (spadlen < 0) spadlen = 0;
486   if (flags & DP_F_ZERO)
487   {
488     zpadlen = MAX(zpadlen, spadlen);
489     spadlen = 0;
490   }
491   if (flags & DP_F_MINUS)
492     spadlen = -spadlen; /* Left Justifty */
493 
494 #ifdef DEBUG_SNPRINTF
495   dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
496       zpadlen, spadlen, min, max, place));
497 #endif
498 
499   /* Spaces */
500   while (spadlen > 0)
501   {
502     dopr_outch (buffer, currlen, maxlen, ' ');
503     --spadlen;
504   }
505 
506   /* Sign */
507   if (signvalue)
508     dopr_outch (buffer, currlen, maxlen, signvalue);
509 
510   /* Zeros */
511   if (zpadlen > 0)
512   {
513     while (zpadlen > 0)
514     {
515       dopr_outch (buffer, currlen, maxlen, '0');
516       --zpadlen;
517     }
518   }
519 
520   /* Digits */
521   while (place > 0)
522     dopr_outch (buffer, currlen, maxlen, convert[--place]);
523 
524   /* Left Justified spaces */
525   while (spadlen < 0) {
526     dopr_outch (buffer, currlen, maxlen, ' ');
527     ++spadlen;
528   }
529 }
530 
531 static long double abs_val (long double value)
532 {
533   long double result = value;
534 
535   if (value < 0)
536     result = -value;
537 
538   return result;
539 }
540 
541 static long double pow10 (int exp)
542 {
543   long double result = 1;
544 
545   while (exp)
546   {
547     result *= 10;
548     exp--;
549   }
550 
551   return result;
552 }
553 
554 static long round (long double value)
555 {
556   long intpart;
557 
558   intpart = value;
559   value = value - intpart;
560   if (value >= 0.5)
561     intpart++;
562 
563   return intpart;
564 }
565 
566 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
567 		   long double fvalue, int min, int max, int flags)
568 {
569   int signvalue = 0;
570   long double ufvalue;
571   char iconvert[20];
572   char fconvert[20];
573   int iplace = 0;
574   int fplace = 0;
575   int padlen = 0; /* amount to pad */
576   int zpadlen = 0;
577   int caps = 0;
578   long intpart;
579   long fracpart;
580 
581   /*
582    * AIX manpage says the default is 0, but Solaris says the default
583    * is 6, and sprintf on AIX defaults to 6
584    */
585   if (max < 0)
586     max = 6;
587 
588   ufvalue = abs_val (fvalue);
589 
590   if (fvalue < 0)
591     signvalue = '-';
592   else
593     if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
594       signvalue = '+';
595     else
596       if (flags & DP_F_SPACE)
597 	signvalue = ' ';
598 
599 #if 0
600   if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
601 #endif
602 
603   intpart = ufvalue;
604 
605   /*
606    * Sorry, we only support 9 digits past the decimal because of our
607    * conversion method
608    */
609   if (max > 9)
610     max = 9;
611 
612   /* We "cheat" by converting the fractional part to integer by
613    * multiplying by a factor of 10
614    */
615   fracpart = round ((pow10 (max)) * (ufvalue - intpart));
616 
617   if (fracpart >= pow10 (max))
618   {
619     intpart++;
620     fracpart -= pow10 (max);
621   }
622 
623 #ifdef DEBUG_SNPRINTF
624   dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart));
625 #endif
626 
627   /* Convert integer part */
628   do {
629     iconvert[iplace++] =
630       (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
631     intpart = (intpart / 10);
632   } while(intpart && (iplace < 20));
633   if (iplace == 20) iplace--;
634   iconvert[iplace] = 0;
635 
636   /* Convert fractional part */
637   do {
638     fconvert[fplace++] =
639       (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
640     fracpart = (fracpart / 10);
641   } while(fracpart && (fplace < 20));
642   if (fplace == 20) fplace--;
643   fconvert[fplace] = 0;
644 
645   /* -1 for decimal point, another -1 if we are printing a sign */
646   padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
647   zpadlen = max - fplace;
648   if (zpadlen < 0)
649     zpadlen = 0;
650   if (padlen < 0)
651     padlen = 0;
652   if (flags & DP_F_MINUS)
653     padlen = -padlen; /* Left Justifty */
654 
655   if ((flags & DP_F_ZERO) && (padlen > 0))
656   {
657     if (signvalue)
658     {
659       dopr_outch (buffer, currlen, maxlen, signvalue);
660       --padlen;
661       signvalue = 0;
662     }
663     while (padlen > 0)
664     {
665       dopr_outch (buffer, currlen, maxlen, '0');
666       --padlen;
667     }
668   }
669   while (padlen > 0)
670   {
671     dopr_outch (buffer, currlen, maxlen, ' ');
672     --padlen;
673   }
674   if (signvalue)
675     dopr_outch (buffer, currlen, maxlen, signvalue);
676 
677   while (iplace > 0)
678     dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
679 
680   /*
681    * Decimal point.  This should probably use locale to find the correct
682    * char to print out.
683    */
684   dopr_outch (buffer, currlen, maxlen, '.');
685 
686   while (fplace > 0)
687     dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
688 
689   while (zpadlen > 0)
690   {
691     dopr_outch (buffer, currlen, maxlen, '0');
692     --zpadlen;
693   }
694 
695   while (padlen < 0)
696   {
697     dopr_outch (buffer, currlen, maxlen, ' ');
698     ++padlen;
699   }
700 }
701 
702 static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c)
703 {
704   if (*currlen < maxlen)
705     buffer[(*currlen)++] = c;
706 }
707 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */
708 
709 #ifndef HAVE_VSNPRINTF
710 int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
711 {
712   str[0] = 0;
713   dopr(str, count, fmt, args);
714   return(strlen(str));
715 }
716 #endif /* !HAVE_VSNPRINTF */
717 
718 #ifndef HAVE_SNPRINTF
719 /* VARARGS3 */
720 #ifdef HAVE_STDARGS
721 int snprintf (char *str,size_t count,const char *fmt,...)
722 #else
723 int snprintf (va_alist) va_dcl
724 #endif
725 {
726 #ifndef HAVE_STDARGS
727   char *str;
728   size_t count;
729   char *fmt;
730 #endif
731   VA_LOCAL_DECL;
732 
733   VA_START (fmt);
734   VA_SHIFT (str, char *);
735   VA_SHIFT (count, size_t );
736   VA_SHIFT (fmt, char *);
737   (void) vsnprintf(str, count, fmt, ap);
738   VA_END;
739   return(strlen(str));
740 }
741 
742 #ifdef TEST_SNPRINTF
743 #ifndef LONG_STRING
744 #define LONG_STRING 1024
745 #endif
746 int main (void)
747 {
748   char buf1[LONG_STRING];
749   char buf2[LONG_STRING];
750   char *fp_fmt[] = {
751     "%-1.5f",
752     "%1.5f",
753     "%123.9f",
754     "%10.5f",
755     "% 10.5f",
756     "%+22.9f",
757     "%+4.9f",
758     "%01.3f",
759     "%4f",
760     "%3.1f",
761     "%3.2f",
762     NULL
763   };
764   double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996,
765     0.9996, 1.996, 4.136, 0};
766   char *int_fmt[] = {
767     "%-1.5d",
768     "%1.5d",
769     "%123.9d",
770     "%5.5d",
771     "%10.5d",
772     "% 10.5d",
773     "%+22.33d",
774     "%01.3d",
775     "%4d",
776     "%lld",
777     "%qd",
778     NULL
779   };
780   long long int_nums[] = { -1, 134, 91340, 341, 0203, 0, 9999999 };
781   int x, y;
782   int fail = 0;
783   int num = 0;
784 
785   printf ("Testing snprintf format codes against system sprintf...\n");
786 
787   for (x = 0; fp_fmt[x] != NULL ; x++)
788     for (y = 0; fp_nums[y] != 0 ; y++)
789     {
790       snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
791       sprintf (buf2, fp_fmt[x], fp_nums[y]);
792       if (strcmp (buf1, buf2))
793       {
794 	printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf  = %s\n",
795 	    fp_fmt[x], buf1, buf2);
796 	fail++;
797       }
798       num++;
799     }
800 
801   for (x = 0; int_fmt[x] != NULL ; x++)
802     for (y = 0; int_nums[y] != 0 ; y++)
803     {
804       snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
805       sprintf (buf2, int_fmt[x], int_nums[y]);
806       if (strcmp (buf1, buf2))
807       {
808 	printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf  = %s\n",
809 	    int_fmt[x], buf1, buf2);
810 	fail++;
811       }
812       num++;
813     }
814   printf ("%d tests failed out of %d.\n", fail, num);
815 }
816 #endif /* SNPRINTF_TEST */
817 
818 #endif /* !HAVE_SNPRINTF */
819