compat/snprintf.c

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