openssh/openbsd-compat/bsd-snprintf.c

   1 /*
   2  * Copyright Patrick Powell 1995
   3  * This code is based on code written by Patrick Powell (papowell@astart.com)
   4  * It may be used for any purpose as long as this notice remains intact
   5  * on all source code distributions
   6  */
   7
   8 /**************************************************************
   9  * Original:
  10  * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
  11  * A bombproof version of doprnt (dopr) included.
  12  * Sigh.  This sort of thing is always nasty do deal with.  Note that
  13  * the version here does not include floating point...
  14  *
  15  * snprintf() is used instead of sprintf() as it does limit checks
  16  * for string length.  This covers a nasty loophole.
  17  *
  18  * The other functions are there to prevent NULL pointers from
  19  * causing nast effects.
  20  *
  21  * More Recently:
  22  *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
  23  *  This was ugly.  It is still ugly.  I opted out of floating point
  24  *  numbers, but the formatter understands just about everything
  25  *  from the normal C string format, at least as far as I can tell from
  26  *  the Solaris 2.5 printf(3S) man page.
  27  *
  28  *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
  29  *    Ok, added some minimal floating point support, which means this
  30  *    probably requires libm on most operating systems.  Don't yet
  31  *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
  32  *    was pretty badly broken, it just wasn't being exercised in ways
  33  *    which showed it, so that's been fixed.  Also, formated the code
  34  *    to mutt conventions, and removed dead code left over from the
  35  *    original.  Also, there is now a builtin-test, just compile with:
  36  *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
  37  *    and run snprintf for results.
  38  *
  39  *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
  40  *    The PGP code was using unsigned hexadecimal formats.
  41  *    Unfortunately, unsigned formats simply didn't work.
  42  *
  43  *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
  44  *    The original code assumed that both snprintf() and vsnprintf() were
  45  *    missing.  Some systems only have snprintf() but not vsnprintf(), so
  46  *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
  47  *
  48  *  Ben Lindstrom <mouring@eviladmin.org> 09/27/00 for OpenSSH
  49  *    Welcome to the world of %lld and %qd support.  With other
  50  *    long long support.  This is needed for sftp-server to work
  51  *    right.
  52  *
  53  *  Ben Lindstrom <mouring@eviladmin.org> 02/12/01 for OpenSSH
  54  *    Removed all hint of VARARGS stuff and banished it to the void,
  55  *    and did a bit of KNF style work to make things a bit more
  56  *    acceptable.  Consider stealing from mutt or enlightenment.
  57  **************************************************************/
  58
  59 #include "includes.h"
  60
  61 RCSID("$Id$");
  62
  63 #if defined(BROKEN_SNPRINTF)            /* For those with broken snprintf() */
  64 # undef HAVE_SNPRINTF
  65 # undef HAVE_VSNPRINTF
  66 #endif
  67
  68 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
  69
  70 static void
  71 dopr(char *buffer, size_t maxlen, const char *format, va_list args);
  72
  73 static void
  74 fmtstr(char *buffer, size_t *currlen, size_t maxlen, char *value, int flags,
  75        int min, int max);
  76
  77 static void
  78 fmtint(char *buffer, size_t *currlen, size_t maxlen, long value, int base,
  79        int min, int max, int flags);
  80
  81 static void
  82 fmtfp(char *buffer, size_t *currlen, size_t maxlen, long double fvalue,
  83       int min, int max, int flags);
  84
  85 static void
  86 dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
  87
  88 /*
  89  * dopr(): poor man's version of doprintf
  90  */
  91
  92 /* format read states */
  93 #define DP_S_DEFAULT 0
  94 #define DP_S_FLAGS   1
  95 #define DP_S_MIN     2
  96 #define DP_S_DOT     3
  97 #define DP_S_MAX     4
  98 #define DP_S_MOD     5
  99 #define DP_S_CONV    6
 100 #define DP_S_DONE    7
 101
 102 /* format flags - Bits */
 103 #define DP_F_MINUS      (1 << 0)
 104 #define DP_F_PLUS       (1 << 1)
 105 #define DP_F_SPACE      (1 << 2)
 106 #define DP_F_NUM        (1 << 3)
 107 #define DP_F_ZERO       (1 << 4)
 108 #define DP_F_UP         (1 << 5)
 109 #define DP_F_UNSIGNED   (1 << 6)
 110
 111 /* Conversion Flags */
 112 #define DP_C_SHORT     1
 113 #define DP_C_LONG      2
 114 #define DP_C_LDOUBLE   3
 115 #define DP_C_LONG_LONG 4
 116
 117 #define char_to_int(p) (p - '0')
 118 #define abs_val(p) (p < 0 ? -p : p)
 119
 120
 121 static void
 122 dopr(char *buffer, size_t maxlen, const char *format, va_list args)
 123 {
 124         char *strvalue;
 125         char ch;
 126         long value;
 127         long double fvalue;
 128         int min = 0;
 129         int max = -1;
 130         int state = DP_S_DEFAULT;
 131         int flags = 0;
 132         int cflags = 0;
 133         size_t currlen = 0;
 134
 135         ch = *format++;
 136
 137         while (state != DP_S_DONE) {
 138                 if ((ch == '\0') || (currlen >= maxlen))
 139                         state = DP_S_DONE;
 140
 141                 switch(state) {
 142                         case DP_S_DEFAULT:
 143                                 if (ch == '%')
 144                                         state = DP_S_FLAGS;
 145                                 else
 146                                         dopr_outch(buffer, &currlen, maxlen, ch);
 147                                 ch = *format++;
 148                                 break;
 149                         case DP_S_FLAGS:
 150                                 switch (ch) {
 151                                         case '-':
 152                                                 flags |= DP_F_MINUS;
 153                                                 ch = *format++;
 154                                                 break;
 155                                         case '+':
 156                                                 flags |= DP_F_PLUS;
 157                                                 ch = *format++;
 158                                                 break;
 159                                         case ' ':
 160                                                 flags |= DP_F_SPACE;
 161                                                 ch = *format++;
 162                                                 break;
 163                                         case '#':
 164                                                 flags |= DP_F_NUM;
 165                                                 ch = *format++;
 166                                                 break;
 167                                         case '0':
 168                                                 flags |= DP_F_ZERO;
 169                                                 ch = *format++;
 170                                                 break;
 171                                         default:
 172                                                 state = DP_S_MIN;
 173                                                 break;
 174                                 }
 175                                 break;
 176                         case DP_S_MIN:
 177                                 if (isdigit((unsigned char)ch)) {
 178                                         min = 10*min + char_to_int (ch);
 179                                         ch = *format++;
 180                                 } else if (ch == '*') {
 181                                         min = va_arg (args, int);
 182                                         ch = *format++;
 183                                         state = DP_S_DOT;
 184                                 } else
 185                                         state = DP_S_DOT;
 186                                 break;
 187                         case DP_S_DOT:
 188                                 if (ch == '.') {
 189                                         state = DP_S_MAX;
 190                                         ch = *format++;
 191                                 } else
 192                                         state = DP_S_MOD;
 193                                 break;
 194                         case DP_S_MAX:
 195                                 if (isdigit((unsigned char)ch)) {
 196                                         if (max < 0)
 197                                                 max = 0;
 198                                         max = 10*max + char_to_int(ch);
 199                                         ch = *format++;
 200                                 } else if (ch == '*') {
 201                                         max = va_arg (args, int);
 202                                         ch = *format++;
 203                                         state = DP_S_MOD;
 204                                 } else
 205                                         state = DP_S_MOD;
 206                                 break;
 207                         case DP_S_MOD:
 208                                 switch (ch) {
 209                                         case 'h':
 210                                                 cflags = DP_C_SHORT;
 211                                                 ch = *format++;
 212                                                 break;
 213                                         case 'l':
 214                                                 cflags = DP_C_LONG;
 215                                                 ch = *format++;
 216                                                 if (ch == 'l') {
 217                                                         cflags = DP_C_LONG_LONG;
 218                                                         ch = *format++;
 219                                                 }
 220                                                 break;
 221                                         case 'q':
 222                                                 cflags = DP_C_LONG_LONG;
 223                                                 ch = *format++;
 224                                                 break;
 225                                         case 'L':
 226                                                 cflags = DP_C_LDOUBLE;
 227                                                 ch = *format++;
 228                                                 break;
 229                                         default:
 230                                                 break;
 231                                 }
 232                                 state = DP_S_CONV;
 233                                 break;
 234                         case DP_S_CONV:
 235                                 switch (ch) {
 236                                         case 'd':
 237                                         case 'i':
 238                                                 if (cflags == DP_C_SHORT)
 239                                                         value = va_arg(args, int);
 240                                                 else if (cflags == DP_C_LONG)
 241                                                         value = va_arg(args, long int);
 242                                                 else if (cflags == DP_C_LONG_LONG)
 243                                                         value = va_arg (args, long long);
 244                                                 else
 245                                                         value = va_arg (args, int);
 246                                                 fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags);
 247                                                 break;
 248                                         case 'o':
 249                                                 flags |= DP_F_UNSIGNED;
 250                                                 if (cflags == DP_C_SHORT)
 251                                                         value = va_arg(args, unsigned int);
 252                                                 else if (cflags == DP_C_LONG)
 253                                                         value = va_arg(args, unsigned long int);
 254                                                 else if (cflags == DP_C_LONG_LONG)
 255                                                         value = va_arg(args, unsigned long long);
 256                                                 else
 257                                                         value = va_arg(args, unsigned int);
 258                                                 fmtint(buffer, &currlen, maxlen, value, 8, min, max, flags);
 259                                                 break;
 260                                         case 'u':
 261                                                 flags |= DP_F_UNSIGNED;
 262                                                 if (cflags == DP_C_SHORT)
 263                                                         value = va_arg(args, unsigned int);
 264                                                 else if (cflags == DP_C_LONG)
 265                                                         value = va_arg(args, unsigned long int);
 266                                                 else if (cflags == DP_C_LONG_LONG)
 267                                                         value = va_arg(args, unsigned long long);
 268                                                 else
 269                                                         value = va_arg(args, unsigned int);
 270                                                 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
 271                                                 break;
 272                                         case 'X':
 273                                                 flags |= DP_F_UP;
 274                                         case 'x':
 275                                                 flags |= DP_F_UNSIGNED;
 276                                                 if (cflags == DP_C_SHORT)
 277                                                         value = va_arg(args, unsigned int);
 278                                                 else if (cflags == DP_C_LONG)
 279                                                         value = va_arg(args, unsigned long int);
 280                                                 else if (cflags == DP_C_LONG_LONG)
 281                                                         value = va_arg(args, unsigned long long);
 282                                                 else
 283                                                         value = va_arg(args, unsigned int);
 284                                                 fmtint(buffer, &currlen, maxlen, value, 16, min, max, flags);
 285                                                 break;
 286                                         case 'f':
 287                                                 if (cflags == DP_C_LDOUBLE)
 288                                                         fvalue = va_arg(args, long double);
 289                                                 else
 290                                                         fvalue = va_arg(args, double);
 291                                                 /* um, floating point? */
 292                                                 fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
 293                                                 break;
 294                                         case 'E':
 295                                                 flags |= DP_F_UP;
 296                                         case 'e':
 297                                                 if (cflags == DP_C_LDOUBLE)
 298                                                         fvalue = va_arg(args, long double);
 299                                                 else
 300                                                         fvalue = va_arg(args, double);
 301                                                 break;
 302                                         case 'G':
 303                                                 flags |= DP_F_UP;
 304                                         case 'g':
 305                                                 if (cflags == DP_C_LDOUBLE)
 306                                                         fvalue = va_arg(args, long double);
 307                                                 else
 308                                                         fvalue = va_arg(args, double);
 309                                                 break;
 310                                         case 'c':
 311                                                 dopr_outch(buffer, &currlen, maxlen, va_arg(args, int));
 312                                                 break;
 313                                         case 's':
 314                                                 strvalue = va_arg(args, char *);
 315                                                 if (max < 0)
 316                                                         max = maxlen; /* ie, no max */
 317                                                 fmtstr(buffer, &currlen, maxlen, strvalue, flags, min, max);
 318                                                 break;
 319                                         case 'p':
 320                                                 strvalue = va_arg(args, void *);
 321                                                 fmtint(buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
 322                                                 break;
 323                                         case 'n':
 324                                                 if (cflags == DP_C_SHORT) {
 325                                                         short int *num;
 326                                                         num = va_arg(args, short int *);
 327                                                         *num = currlen;
 328                                                 } else if (cflags == DP_C_LONG) {
 329                                                         long int *num;
 330                                                         num = va_arg(args, long int *);
 331                                                         *num = currlen;
 332                                                 } else if (cflags == DP_C_LONG_LONG) {
 333                                                         long long *num;
 334                                                         num = va_arg(args, long long *);
 335                                                         *num = currlen;
 336                                                 } else {
 337                                                         int *num;
 338                                                         num = va_arg(args, int *);
 339                                                         *num = currlen;
 340                                                 }
 341                                                 break;
 342                                         case '%':
 343                                                 dopr_outch(buffer, &currlen, maxlen, ch);
 344                                                 break;
 345                                         case 'w': /* not supported yet, treat as next char */
 346                                                 ch = *format++;
 347                                                 break;
 348                                         default: /* Unknown, skip */
 349                                         break;
 350                                 }
 351                                 ch = *format++;
 352                                 state = DP_S_DEFAULT;
 353                                 flags = cflags = min = 0;
 354                                 max = -1;
 355                                 break;
 356                         case DP_S_DONE:
 357                                 break;
 358                         default: /* hmm? */
 359                                 break; /* some picky compilers need this */
 360                 }
 361         }
 362         if (currlen < maxlen - 1)
 363                 buffer[currlen] = '\0';
 364         else
 365                 buffer[maxlen - 1] = '\0';
 366 }
 367
 368 static void
 369 fmtstr(char *buffer, size_t *currlen, size_t maxlen,
 370        char *value, int flags, int min, int max)
 371 {
 372         int padlen, strln;     /* amount to pad */
 373         int cnt = 0;
 374
 375         if (value == 0)
 376                 value = "<NULL>";
 377
 378         for (strln = 0; value[strln]; ++strln); /* strlen */
 379         padlen = min - strln;
 380         if (padlen < 0)
 381                 padlen = 0;
 382         if (flags & DP_F_MINUS)
 383                 padlen = -padlen; /* Left Justify */
 384
 385         while ((padlen > 0) && (cnt < max)) {
 386                 dopr_outch(buffer, currlen, maxlen, ' ');
 387                 --padlen;
 388                 ++cnt;
 389         }
 390         while (*value && (cnt < max)) {
 391                 dopr_outch(buffer, currlen, maxlen, *value++);
 392                 ++cnt;
 393         }
 394         while ((padlen < 0) && (cnt < max)) {
 395                 dopr_outch(buffer, currlen, maxlen, ' ');
 396                 ++padlen;
 397                 ++cnt;
 398         }
 399 }
 400
 401 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
 402
 403 static void
 404 fmtint(char *buffer, size_t *currlen, size_t maxlen,
 405        long value, int base, int min, int max, int flags)
 406 {
 407         unsigned long uvalue;
 408         char convert[20];
 409         int signvalue = 0;
 410         int place = 0;
 411         int spadlen = 0; /* amount to space pad */
 412         int zpadlen = 0; /* amount to zero pad */
 413         int caps = 0;
 414
 415         if (max < 0)
 416                 max = 0;
 417
 418         uvalue = value;
 419
 420         if (!(flags & DP_F_UNSIGNED)) {
 421                 if (value < 0) {
 422                         signvalue = '-';
 423                         uvalue = -value;
 424                 } else if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
 425                         signvalue = '+';
 426                 else if (flags & DP_F_SPACE)
 427                         signvalue = ' ';
 428         }
 429
 430         if (flags & DP_F_UP)
 431                 caps = 1; /* Should characters be upper case? */
 432
 433         do {
 434                 convert[place++] =
 435                         (caps? "0123456789ABCDEF":"0123456789abcdef")
 436                         [uvalue % (unsigned)base];
 437                 uvalue = (uvalue / (unsigned)base );
 438         } while (uvalue && (place < 20));
 439         if (place == 20)
 440                 place--;
 441         convert[place] = 0;
 442
 443         zpadlen = max - place;
 444         spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
 445         if (zpadlen < 0)
 446                 zpadlen = 0;
 447         if (spadlen < 0)
 448                 spadlen = 0;
 449         if (flags & DP_F_ZERO) {
 450                 zpadlen = MAX(zpadlen, spadlen);
 451                 spadlen = 0;
 452         }
 453         if (flags & DP_F_MINUS)
 454                 spadlen = -spadlen; /* Left Justifty */
 455
 456
 457         /* Spaces */
 458         while (spadlen > 0) {
 459                 dopr_outch(buffer, currlen, maxlen, ' ');
 460                 --spadlen;
 461         }
 462
 463         /* Sign */
 464         if (signvalue)
 465                 dopr_outch(buffer, currlen, maxlen, signvalue);
 466
 467         /* Zeros */
 468         if (zpadlen > 0) {
 469                 while (zpadlen > 0) {
 470                         dopr_outch(buffer, currlen, maxlen, '0');
 471                         --zpadlen;
 472                 }
 473         }
 474
 475         /* Digits */
 476         while (place > 0)
 477                 dopr_outch(buffer, currlen, maxlen, convert[--place]);
 478
 479         /* Left Justified spaces */
 480         while (spadlen < 0) {
 481                 dopr_outch (buffer, currlen, maxlen, ' ');
 482                 ++spadlen;
 483         }
 484 }
 485
 486 static long double
 487 pow10(int exp)
 488 {
 489         long double result = 1;
 490
 491         while (exp) {
 492                 result *= 10;
 493                 exp--;
 494         }
 495
 496         return result;
 497 }
 498
 499 static long
 500 round(long double value)
 501 {
 502         long intpart = value;
 503
 504         value -= intpart;
 505         if (value >= 0.5)
 506                 intpart++;
 507
 508         return intpart;
 509 }
 510
 511 static void
 512 fmtfp(char *buffer, size_t *currlen, size_t maxlen, long double fvalue,
 513       int min, int max, int flags)
 514 {
 515         char iconvert[20];
 516         char fconvert[20];
 517         int signvalue = 0;
 518         int iplace = 0;
 519         int fplace = 0;
 520         int padlen = 0; /* amount to pad */
 521         int zpadlen = 0;
 522         int caps = 0;
 523         long intpart;
 524         long fracpart;
 525         long double ufvalue;
 526
 527         /*
 528          * AIX manpage says the default is 0, but Solaris says the default
 529          * is 6, and sprintf on AIX defaults to 6
 530          */
 531         if (max < 0)
 532                 max = 6;
 533
 534         ufvalue = abs_val(fvalue);
 535
 536         if (fvalue < 0)
 537                 signvalue = '-';
 538         else if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
 539                 signvalue = '+';
 540         else if (flags & DP_F_SPACE)
 541                 signvalue = ' ';
 542
 543         intpart = ufvalue;
 544
 545         /*
 546          * Sorry, we only support 9 digits past the decimal because of our
 547          * conversion method
 548          */
 549         if (max > 9)
 550                 max = 9;
 551
 552         /* We "cheat" by converting the fractional part to integer by
 553          * multiplying by a factor of 10
 554          */
 555         fracpart = round((pow10 (max)) * (ufvalue - intpart));
 556
 557         if (fracpart >= pow10 (max)) {
 558                 intpart++;
 559                 fracpart -= pow10 (max);
 560         }
 561
 562         /* Convert integer part */
 563         do {
 564                 iconvert[iplace++] =
 565                   (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
 566                 intpart = (intpart / 10);
 567         } while(intpart && (iplace < 20));
 568         if (iplace == 20)
 569                 iplace--;
 570         iconvert[iplace] = 0;
 571
 572         /* Convert fractional part */
 573         do {
 574                 fconvert[fplace++] =
 575                   (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
 576                 fracpart = (fracpart / 10);
 577         } while(fracpart && (fplace < 20));
 578         if (fplace == 20)
 579                 fplace--;
 580         fconvert[fplace] = 0;
 581
 582         /* -1 for decimal point, another -1 if we are printing a sign */
 583         padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
 584         zpadlen = max - fplace;
 585         if (zpadlen < 0)
 586                 zpadlen = 0;
 587         if (padlen < 0)
 588                 padlen = 0;
 589         if (flags & DP_F_MINUS)
 590                 padlen = -padlen; /* Left Justifty */
 591
 592         if ((flags & DP_F_ZERO) && (padlen > 0)) {
 593                 if (signvalue) {
 594                         dopr_outch(buffer, currlen, maxlen, signvalue);
 595                         --padlen;
 596                         signvalue = 0;
 597                 }
 598                 while (padlen > 0) {
 599                         dopr_outch(buffer, currlen, maxlen, '0');
 600                         --padlen;
 601                 }
 602         }
 603         while (padlen > 0) {
 604                 dopr_outch(buffer, currlen, maxlen, ' ');
 605                 --padlen;
 606         }
 607         if (signvalue)
 608                 dopr_outch(buffer, currlen, maxlen, signvalue);
 609
 610         while (iplace > 0)
 611                 dopr_outch(buffer, currlen, maxlen, iconvert[--iplace]);
 612
 613         /*
 614          * Decimal point.  This should probably use locale to find the correct
 615          * char to print out.
 616          */
 617         dopr_outch(buffer, currlen, maxlen, '.');
 618
 619         while (fplace > 0)
 620                 dopr_outch(buffer, currlen, maxlen, fconvert[--fplace]);
 621
 622         while (zpadlen > 0) {
 623                 dopr_outch(buffer, currlen, maxlen, '0');
 624                 --zpadlen;
 625         }
 626
 627         while (padlen < 0) {
 628                 dopr_outch(buffer, currlen, maxlen, ' ');
 629                 ++padlen;
 630         }
 631 }
 632
 633 static void
 634 dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
 635 {
 636         if (*currlen < maxlen)
 637                 buffer[(*currlen)++] = c;
 638 }
 639 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */
 640
 641 #ifndef HAVE_VSNPRINTF
 642 int
 643 vsnprintf(char *str, size_t count, const char *fmt, va_list args)
 644 {
 645         str[0] = 0;
 646         dopr(str, count, fmt, args);
 647
 648         return(strlen(str));
 649 }
 650 #endif /* !HAVE_VSNPRINTF */
 651
 652 #ifndef HAVE_SNPRINTF
 653 int
 654 snprintf(char *str,size_t count,const char *fmt,...)
 655 {
 656         va_list ap;
 657
 658         va_start(ap, fmt);
 659         (void) vsnprintf(str, count, fmt, ap);
 660         va_end(ap);
 661
 662         return(strlen(str));
 663 }
 664
 665 #ifdef TEST_SNPRINTF
 666 int
 667 main(void)
 668 {
 669 #define LONG_STRING 1024
 670         char buf1[LONG_STRING];
 671         char buf2[LONG_STRING];
 672         char *fp_fmt[] = {
 673                 "%-1.5f",
 674                 "%1.5f",
 675                 "%123.9f",
 676                 "%10.5f",
 677                 "% 10.5f",
 678                 "%+22.9f",
 679                 "%+4.9f",
 680                 "%01.3f",
 681                 "%4f",
 682                 "%3.1f",
 683                 "%3.2f",
 684                 NULL
 685         };
 686         double fp_nums[] = {
 687                 -1.5,
 688                 134.21,
 689                 91340.2,
 690                 341.1234,
 691                 0203.9,
 692                 0.96,
 693                 0.996,
 694                 0.9996,
 695                 1.996,
 696                 4.136,
 697                 0
 698         };
 699         char *int_fmt[] = {
 700                 "%-1.5d",
 701                 "%1.5d",
 702                 "%123.9d",
 703                 "%5.5d",
 704                 "%10.5d",
 705                 "% 10.5d",
 706                 "%+22.33d",
 707                 "%01.3d",
 708                 "%4d",
 709                 "%lld",
 710                 "%qd",
 711                 NULL
 712         };
 713         long long int_nums[] = { -1, 134, 91340, 341, 0203, 0, 9999999 };
 714         int x, y;
 715         int fail = 0;
 716         int num = 0;
 717
 718         printf("Testing snprintf format codes against system sprintf...\n");
 719
 720         for (x = 0; fp_fmt[x] != NULL ; x++) {
 721                 for (y = 0; fp_nums[y] != 0 ; y++) {
 722                         snprintf(buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
 723                         sprintf (buf2, fp_fmt[x], fp_nums[y]);
 724                         if (strcmp (buf1, buf2)) {
 725                                 printf("snprintf doesn't match Format: %s\n\t"
 726                                        "snprintf = %s\n\tsprintf  = %s\n",
 727                                         fp_fmt[x], buf1, buf2);
 728                                 fail++;
 729                         }
 730                         num++;
 731                 }
 732         }
 733         for (x = 0; int_fmt[x] != NULL ; x++) {
 734                 for (y = 0; int_nums[y] != 0 ; y++) {
 735                         snprintf(buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
 736                         sprintf(buf2, int_fmt[x], int_nums[y]);
 737                         if (strcmp (buf1, buf2)) {
 738                                 printf("snprintf doesn't match Format: %s\n\t"
 739                                        "snprintf = %s\n\tsprintf  = %s\n",
 740                                         int_fmt[x], buf1, buf2);
 741                                 fail++;
 742                         }
 743                         num++;
 744                 }
 745         }
 746         printf("%d tests failed out of %d.\n", fail, num);
 747         return(0);
 748 }
 749 #endif /* SNPRINTF_TEST */
 750
 751 #endif /* !HAVE_SNPRINTF */