root/lib/replace/snprintf.c

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DEFINITIONS

This source file includes following definitions.
  1. dummy_snprintf
  2. dopr
  3. fmtstr
  4. fmtint
  5. abs_val
  6. POW10
  7. ROUND
  8. my_modf
  9. fmtfp
  10. dopr_outch
  11. new_chunk
  12. add_cnk_list_entry
  13. vsnprintf
  14. snprintf
  15. printf
  16. fprintf
  17. vasprintf
  18. asprintf
  19. main

   1 /*
   2  * NOTE: If you change this file, please merge it into rsync, samba, etc.
   3  */
   4 
   5 /*
   6  * Copyright Patrick Powell 1995
   7  * This code is based on code written by Patrick Powell (papowell@astart.com)
   8  * It may be used for any purpose as long as this notice remains intact
   9  * on all source code distributions
  10  */
  11 
  12 /**************************************************************
  13  * Original:
  14  * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
  15  * A bombproof version of doprnt (dopr) included.
  16  * Sigh.  This sort of thing is always nasty do deal with.  Note that
  17  * the version here does not include floating point...
  18  *
  19  * snprintf() is used instead of sprintf() as it does limit checks
  20  * for string length.  This covers a nasty loophole.
  21  *
  22  * The other functions are there to prevent NULL pointers from
  23  * causing nast effects.
  24  *
  25  * More Recently:
  26  *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
  27  *  This was ugly.  It is still ugly.  I opted out of floating point
  28  *  numbers, but the formatter understands just about everything
  29  *  from the normal C string format, at least as far as I can tell from
  30  *  the Solaris 2.5 printf(3S) man page.
  31  *
  32  *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
  33  *    Ok, added some minimal floating point support, which means this
  34  *    probably requires libm on most operating systems.  Don't yet
  35  *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
  36  *    was pretty badly broken, it just wasn't being exercised in ways
  37  *    which showed it, so that's been fixed.  Also, formated the code
  38  *    to mutt conventions, and removed dead code left over from the
  39  *    original.  Also, there is now a builtin-test, just compile with:
  40  *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
  41  *    and run snprintf for results.
  42  * 
  43  *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
  44  *    The PGP code was using unsigned hexadecimal formats. 
  45  *    Unfortunately, unsigned formats simply didn't work.
  46  *
  47  *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
  48  *    The original code assumed that both snprintf() and vsnprintf() were
  49  *    missing.  Some systems only have snprintf() but not vsnprintf(), so
  50  *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
  51  *
  52  *  Andrew Tridgell (tridge@samba.org) Oct 1998
  53  *    fixed handling of %.0f
  54  *    added test for HAVE_LONG_DOUBLE
  55  *
  56  * tridge@samba.org, idra@samba.org, April 2001
  57  *    got rid of fcvt code (twas buggy and made testing harder)
  58  *    added C99 semantics
  59  *
  60  * date: 2002/12/19 19:56:31;  author: herb;  state: Exp;  lines: +2 -0
  61  * actually print args for %g and %e
  62  * 
  63  * date: 2002/06/03 13:37:52;  author: jmcd;  state: Exp;  lines: +8 -0
  64  * Since includes.h isn't included here, VA_COPY has to be defined here.  I don't
  65  * see any include file that is guaranteed to be here, so I'm defining it
  66  * locally.  Fixes AIX and Solaris builds.
  67  * 
  68  * date: 2002/06/03 03:07:24;  author: tridge;  state: Exp;  lines: +5 -13
  69  * put the ifdef for HAVE_VA_COPY in one place rather than in lots of
  70  * functions
  71  * 
  72  * date: 2002/05/17 14:51:22;  author: jmcd;  state: Exp;  lines: +21 -4
  73  * Fix usage of va_list passed as an arg.  Use __va_copy before using it
  74  * when it exists.
  75  * 
  76  * date: 2002/04/16 22:38:04;  author: idra;  state: Exp;  lines: +20 -14
  77  * Fix incorrect zpadlen handling in fmtfp.
  78  * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it.
  79  * few mods to make it easier to compile the tests.
  80  * addedd the "Ollie" test to the floating point ones.
  81  *
  82  * Martin Pool (mbp@samba.org) April 2003
  83  *    Remove NO_CONFIG_H so that the test case can be built within a source
  84  *    tree with less trouble.
  85  *    Remove unnecessary SAFE_FREE() definition.
  86  *
  87  * Martin Pool (mbp@samba.org) May 2003
  88  *    Put in a prototype for dummy_snprintf() to quiet compiler warnings.
  89  *
  90  *    Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
  91  *    if the C library has some snprintf functions already.
  92  *
  93  * Darren Tucker (dtucker@zip.com.au) 2005
  94  *    Fix bug allowing read overruns of the source string with "%.*s"
  95  *    Usually harmless unless the read runs outside the process' allocation
  96  *    (eg if your malloc does guard pages) in which case it will segfault.
  97  *    From OpenSSH.  Also added test for same.
  98  *
  99  * Simo Sorce (idra@samba.org) Jan 2006
 100  * 
 101  *    Add support for position independent parameters 
 102  *    fix fmtstr now it conforms to sprintf wrt min.max
 103  *
 104  **************************************************************/
 105 
 106 #include "replace.h"
 107 #include "system/locale.h"
 108 
 109 #ifdef TEST_SNPRINTF /* need math library headers for testing */
 110 
 111 /* In test mode, we pretend that this system doesn't have any snprintf
 112  * functions, regardless of what config.h says. */
 113 #  undef HAVE_SNPRINTF
 114 #  undef HAVE_VSNPRINTF
 115 #  undef HAVE_C99_VSNPRINTF
 116 #  undef HAVE_ASPRINTF
 117 #  undef HAVE_VASPRINTF
 118 #  include <math.h>
 119 #endif /* TEST_SNPRINTF */
 120 
 121 #if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
 122 /* only include stdio.h if we are not re-defining snprintf or vsnprintf */
 123 #include <stdio.h>
 124  /* make the compiler happy with an empty file */
 125  void dummy_snprintf(void);
 126  void dummy_snprintf(void) {} 
     /* [<][>][^][v][top][bottom][index][help] */
 127 #endif /* HAVE_SNPRINTF, etc */
 128 
 129 /* yes this really must be a ||. Don't muck with this (tridge) */
 130 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 131 
 132 #ifdef HAVE_LONG_DOUBLE
 133 #define LDOUBLE long double
 134 #else
 135 #define LDOUBLE double
 136 #endif
 137 
 138 #ifdef HAVE_LONG_LONG
 139 #define LLONG long long
 140 #else
 141 #define LLONG long
 142 #endif
 143 
 144 #ifndef VA_COPY
 145 #ifdef HAVE_VA_COPY
 146 #define VA_COPY(dest, src) va_copy(dest, src)
 147 #else
 148 #ifdef HAVE___VA_COPY
 149 #define VA_COPY(dest, src) __va_copy(dest, src)
 150 #else
 151 #define VA_COPY(dest, src) (dest) = (src)
 152 #endif
 153 #endif
 154 
 155 /*
 156  * dopr(): poor man's version of doprintf
 157  */
 158 
 159 /* format read states */
 160 #define DP_S_DEFAULT 0
 161 #define DP_S_FLAGS   1
 162 #define DP_S_MIN     2
 163 #define DP_S_DOT     3
 164 #define DP_S_MAX     4
 165 #define DP_S_MOD     5
 166 #define DP_S_CONV    6
 167 #define DP_S_DONE    7
 168 
 169 /* format flags - Bits */
 170 #define DP_F_MINUS      (1 << 0)
 171 #define DP_F_PLUS       (1 << 1)
 172 #define DP_F_SPACE      (1 << 2)
 173 #define DP_F_NUM        (1 << 3)
 174 #define DP_F_ZERO       (1 << 4)
 175 #define DP_F_UP         (1 << 5)
 176 #define DP_F_UNSIGNED   (1 << 6)
 177 
 178 /* Conversion Flags */
 179 #define DP_C_CHAR    1
 180 #define DP_C_SHORT   2
 181 #define DP_C_LONG    3
 182 #define DP_C_LDOUBLE 4
 183 #define DP_C_LLONG   5
 184 #define DP_C_SIZET   6
 185 
 186 /* Chunk types */
 187 #define CNK_FMT_STR 0
 188 #define CNK_INT     1
 189 #define CNK_OCTAL   2
 190 #define CNK_UINT    3
 191 #define CNK_HEX     4
 192 #define CNK_FLOAT   5
 193 #define CNK_CHAR    6
 194 #define CNK_STRING  7
 195 #define CNK_PTR     8
 196 #define CNK_NUM     9
 197 #define CNK_PRCNT   10
 198 
 199 #define char_to_int(p) ((p)- '0')
 200 #ifndef MAX
 201 #define MAX(p,q) (((p) >= (q)) ? (p) : (q))
 202 #endif
 203 
 204 struct pr_chunk {
 205         int type; /* chunk type */
 206         int num; /* parameter number */
 207         int min; 
 208         int max;
 209         int flags;
 210         int cflags;
 211         int start;
 212         int len;
 213         LLONG value;
 214         LDOUBLE fvalue;
 215         char *strvalue;
 216         void *pnum;
 217         struct pr_chunk *min_star;
 218         struct pr_chunk *max_star;
 219         struct pr_chunk *next;
 220 };
 221 
 222 struct pr_chunk_x {
 223         struct pr_chunk **chunks;
 224         int num;
 225 };
 226 
 227 static int dopr(char *buffer, size_t maxlen, const char *format, 
 228                    va_list args_in);
 229 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
 230                     char *value, int flags, int min, int max);
 231 static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
 232                     LLONG value, int base, int min, int max, int flags);
 233 static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
 234                    LDOUBLE fvalue, int min, int max, int flags);
 235 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
 236 static struct pr_chunk *new_chunk(void);
 237 static int add_cnk_list_entry(struct pr_chunk_x **list,
 238                                 int max_num, struct pr_chunk *chunk);
 239 
 240 static int dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
     /* [<][>][^][v][top][bottom][index][help] */
 241 {
 242         char ch;
 243         int state;
 244         int pflag;
 245         int pnum;
 246         int pfirst;
 247         size_t currlen;
 248         va_list args;
 249         const char *base;
 250         struct pr_chunk *chunks = NULL;
 251         struct pr_chunk *cnk = NULL;
 252         struct pr_chunk_x *clist = NULL;
 253         int max_pos;
 254         int ret = -1;
 255 
 256         VA_COPY(args, args_in);
 257 
 258         state = DP_S_DEFAULT;
 259         pfirst = 1;
 260         pflag = 0;
 261         pnum = 0;
 262 
 263         max_pos = 0;
 264         base = format;
 265         ch = *format++;
 266         
 267         /* retrieve the string structure as chunks */
 268         while (state != DP_S_DONE) {
 269                 if (ch == '\0') 
 270                         state = DP_S_DONE;
 271 
 272                 switch(state) {
 273                 case DP_S_DEFAULT:
 274                         
 275                         if (cnk) {
 276                                 cnk->next = new_chunk();
 277                                 cnk = cnk->next;
 278                         } else {
 279                                 cnk = new_chunk();
 280                         }
 281                         if (!cnk) goto done;
 282                         if (!chunks) chunks = cnk;
 283                         
 284                         if (ch == '%') {
 285                                 state = DP_S_FLAGS;
 286                                 ch = *format++;
 287                         } else {
 288                                 cnk->type = CNK_FMT_STR;
 289                                 cnk->start = format - base -1;
 290                                 while ((ch != '\0') && (ch != '%')) ch = *format++;
 291                                 cnk->len = format - base - cnk->start -1;
 292                         }
 293                         break;
 294                 case DP_S_FLAGS:
 295                         switch (ch) {
 296                         case '-':
 297                                 cnk->flags |= DP_F_MINUS;
 298                                 ch = *format++;
 299                                 break;
 300                         case '+':
 301                                 cnk->flags |= DP_F_PLUS;
 302                                 ch = *format++;
 303                                 break;
 304                         case ' ':
 305                                 cnk->flags |= DP_F_SPACE;
 306                                 ch = *format++;
 307                                 break;
 308                         case '#':
 309                                 cnk->flags |= DP_F_NUM;
 310                                 ch = *format++;
 311                                 break;
 312                         case '0':
 313                                 cnk->flags |= DP_F_ZERO;
 314                                 ch = *format++;
 315                                 break;
 316                         case 'I':
 317                                 /* internationalization not supported yet */
 318                                 ch = *format++;
 319                                 break;
 320                         default:
 321                                 state = DP_S_MIN;
 322                                 break;
 323                         }
 324                         break;
 325                 case DP_S_MIN:
 326                         if (isdigit((unsigned char)ch)) {
 327                                 cnk->min = 10 * cnk->min + char_to_int (ch);
 328                                 ch = *format++;
 329                         } else if (ch == '$') {
 330                                 if (!pfirst && !pflag) {
 331                                         /* parameters must be all positioned or none */
 332                                         goto done;
 333                                 }
 334                                 if (pfirst) {
 335                                         pfirst = 0;
 336                                         pflag = 1;
 337                                 }
 338                                 if (cnk->min == 0) /* what ?? */
 339                                         goto done;
 340                                 cnk->num = cnk->min;
 341                                 cnk->min = 0;
 342                                 ch = *format++;
 343                         } else if (ch == '*') {
 344                                 if (pfirst) pfirst = 0;
 345                                 cnk->min_star = new_chunk();
 346                                 if (!cnk->min_star) /* out of memory :-( */
 347                                         goto done;
 348                                 cnk->min_star->type = CNK_INT;
 349                                 if (pflag) {
 350                                         int num;
 351                                         ch = *format++;
 352                                         if (!isdigit((unsigned char)ch)) {
 353                                                 /* parameters must be all positioned or none */
 354                                                 goto done;
 355                                         }
 356                                         for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
 357                                                 num = 10 * num + char_to_int(ch);
 358                                         }
 359                                         cnk->min_star->num = num;
 360                                         if (ch != '$') /* what ?? */
 361                                                 goto done;
 362                                 } else {
 363                                         cnk->min_star->num = ++pnum;
 364                                 }
 365                                 max_pos = add_cnk_list_entry(&clist, max_pos, cnk->min_star);
 366                                 if (max_pos == 0) /* out of memory :-( */
 367                                         goto done;
 368                                 ch = *format++;
 369                                 state = DP_S_DOT;
 370                         } else {
 371                                 if (pfirst) pfirst = 0;
 372                                 state = DP_S_DOT;
 373                         }
 374                         break;
 375                 case DP_S_DOT:
 376                         if (ch == '.') {
 377                                 state = DP_S_MAX;
 378                                 ch = *format++;
 379                         } else { 
 380                                 state = DP_S_MOD;
 381                         }
 382                         break;
 383                 case DP_S_MAX:
 384                         if (isdigit((unsigned char)ch)) {
 385                                 if (cnk->max < 0)
 386                                         cnk->max = 0;
 387                                 cnk->max = 10 * cnk->max + char_to_int (ch);
 388                                 ch = *format++;
 389                         } else if (ch == '$') {
 390                                 if (!pfirst && !pflag) {
 391                                         /* parameters must be all positioned or none */
 392                                         goto done;
 393                                 }
 394                                 if (cnk->max <= 0) /* what ?? */
 395                                         goto done;
 396                                 cnk->num = cnk->max;
 397                                 cnk->max = -1;
 398                                 ch = *format++;
 399                         } else if (ch == '*') {
 400                                 cnk->max_star = new_chunk();
 401                                 if (!cnk->max_star) /* out of memory :-( */
 402                                         goto done;
 403                                 cnk->max_star->type = CNK_INT;
 404                                 if (pflag) {
 405                                         int num;
 406                                         ch = *format++;
 407                                         if (!isdigit((unsigned char)ch)) {
 408                                                 /* parameters must be all positioned or none */
 409                                                 goto done;
 410                                         }
 411                                         for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
 412                                                 num = 10 * num + char_to_int(ch);
 413                                         }
 414                                         cnk->max_star->num = num;
 415                                         if (ch != '$') /* what ?? */
 416                                                 goto done;
 417                                 } else {
 418                                         cnk->max_star->num = ++pnum;
 419                                 }
 420                                 max_pos = add_cnk_list_entry(&clist, max_pos, cnk->max_star);
 421                                 if (max_pos == 0) /* out of memory :-( */
 422                                         goto done;
 423 
 424                                 ch = *format++;
 425                                 state = DP_S_MOD;
 426                         } else {
 427                                 state = DP_S_MOD;
 428                         }
 429                         break;
 430                 case DP_S_MOD:
 431                         switch (ch) {
 432                         case 'h':
 433                                 cnk->cflags = DP_C_SHORT;
 434                                 ch = *format++;
 435                                 if (ch == 'h') {
 436                                         cnk->cflags = DP_C_CHAR;
 437                                         ch = *format++;
 438                                 }
 439                                 break;
 440                         case 'l':
 441                                 cnk->cflags = DP_C_LONG;
 442                                 ch = *format++;
 443                                 if (ch == 'l') {        /* It's a long long */
 444                                         cnk->cflags = DP_C_LLONG;
 445                                         ch = *format++;
 446                                 }
 447                                 break;
 448                         case 'L':
 449                                 cnk->cflags = DP_C_LDOUBLE;
 450                                 ch = *format++;
 451                                 break;
 452                         case 'z':
 453                                 cnk->cflags = DP_C_SIZET;
 454                                 ch = *format++;
 455                                 break;
 456                         default:
 457                                 break;
 458                         }
 459                         state = DP_S_CONV;
 460                         break;
 461                 case DP_S_CONV:
 462                         if (cnk->num == 0) cnk->num = ++pnum;
 463                         max_pos = add_cnk_list_entry(&clist, max_pos, cnk);
 464                         if (max_pos == 0) /* out of memory :-( */
 465                                 goto done;
 466                         
 467                         switch (ch) {
 468                         case 'd':
 469                         case 'i':
 470                                 cnk->type = CNK_INT;
 471                                 break;
 472                         case 'o':
 473                                 cnk->type = CNK_OCTAL;
 474                                 cnk->flags |= DP_F_UNSIGNED;
 475                                 break;
 476                         case 'u':
 477                                 cnk->type = CNK_UINT;
 478                                 cnk->flags |= DP_F_UNSIGNED;
 479                                 break;
 480                         case 'X':
 481                                 cnk->flags |= DP_F_UP;
 482                         case 'x':
 483                                 cnk->type = CNK_HEX;
 484                                 cnk->flags |= DP_F_UNSIGNED;
 485                                 break;
 486                         case 'A':
 487                                 /* hex float not supported yet */
 488                         case 'E':
 489                         case 'G':
 490                         case 'F':
 491                                 cnk->flags |= DP_F_UP;
 492                         case 'a':
 493                                 /* hex float not supported yet */
 494                         case 'e':
 495                         case 'f':
 496                         case 'g':
 497                                 cnk->type = CNK_FLOAT;
 498                                 break;
 499                         case 'c':
 500                                 cnk->type = CNK_CHAR;
 501                                 break;
 502                         case 's':
 503                                 cnk->type = CNK_STRING;
 504                                 break;
 505                         case 'p':
 506                                 cnk->type = CNK_PTR;
 507                                 break;
 508                         case 'n':
 509                                 cnk->type = CNK_NUM;
 510                                 break;
 511                         case '%':
 512                                 cnk->type = CNK_PRCNT;
 513                                 break;
 514                         default:
 515                                 /* Unknown, bail out*/
 516                                 goto done;
 517                         }
 518                         ch = *format++;
 519                         state = DP_S_DEFAULT;
 520                         break;
 521                 case DP_S_DONE:
 522                         break;
 523                 default:
 524                         /* hmm? */
 525                         break; /* some picky compilers need this */
 526                 }
 527         }
 528 
 529         /* retrieve the format arguments */
 530         for (pnum = 0; pnum < max_pos; pnum++) {
 531                 int i;
 532 
 533                 if (clist[pnum].num == 0) {
 534                         /* ignoring a parameter should not be permitted
 535                          * all parameters must be matched at least once
 536                          * BUT seem some system ignore this rule ...
 537                          * at least my glibc based system does --SSS
 538                          */
 539 #ifdef DEBUG_SNPRINTF
 540                         printf("parameter at position %d not used\n", pnum+1);
 541 #endif
 542                         /* eat the parameter */
 543                         va_arg (args, int);
 544                         continue;
 545                 }
 546                 for (i = 1; i < clist[pnum].num; i++) {
 547                         if (clist[pnum].chunks[0]->type != clist[pnum].chunks[i]->type) {
 548                                 /* nooo noo no!
 549                                  * all the references to a parameter
 550                                  * must be of the same type
 551                                  */
 552                                 goto done;
 553                         }
 554                 }
 555                 cnk = clist[pnum].chunks[0];
 556                 switch (cnk->type) {
 557                 case CNK_INT:
 558                         if (cnk->cflags == DP_C_SHORT) 
 559                                 cnk->value = va_arg (args, int);
 560                         else if (cnk->cflags == DP_C_LONG)
 561                                 cnk->value = va_arg (args, long int);
 562                         else if (cnk->cflags == DP_C_LLONG)
 563                                 cnk->value = va_arg (args, LLONG);
 564                         else if (cnk->cflags == DP_C_SIZET)
 565                                 cnk->value = va_arg (args, ssize_t);
 566                         else
 567                                 cnk->value = va_arg (args, int);
 568 
 569                         for (i = 1; i < clist[pnum].num; i++) {
 570                                 clist[pnum].chunks[i]->value = cnk->value;
 571                         }
 572                         break;
 573 
 574                 case CNK_OCTAL:
 575                 case CNK_UINT:
 576                 case CNK_HEX:
 577                         if (cnk->cflags == DP_C_SHORT)
 578                                 cnk->value = va_arg (args, unsigned int);
 579                         else if (cnk->cflags == DP_C_LONG)
 580                                 cnk->value = (unsigned long int)va_arg (args, unsigned long int);
 581                         else if (cnk->cflags == DP_C_LLONG)
 582                                 cnk->value = (LLONG)va_arg (args, unsigned LLONG);
 583                         else if (cnk->cflags == DP_C_SIZET)
 584                                 cnk->value = (size_t)va_arg (args, size_t);
 585                         else
 586                                 cnk->value = (unsigned int)va_arg (args, unsigned int);
 587 
 588                         for (i = 1; i < clist[pnum].num; i++) {
 589                                 clist[pnum].chunks[i]->value = cnk->value;
 590                         }
 591                         break;
 592 
 593                 case CNK_FLOAT:
 594                         if (cnk->cflags == DP_C_LDOUBLE)
 595                                 cnk->fvalue = va_arg (args, LDOUBLE);
 596                         else
 597                                 cnk->fvalue = va_arg (args, double);
 598 
 599                         for (i = 1; i < clist[pnum].num; i++) {
 600                                 clist[pnum].chunks[i]->fvalue = cnk->fvalue;
 601                         }
 602                         break;
 603 
 604                 case CNK_CHAR:
 605                         cnk->value = va_arg (args, int);
 606 
 607                         for (i = 1; i < clist[pnum].num; i++) {
 608                                 clist[pnum].chunks[i]->value = cnk->value;
 609                         }
 610                         break;
 611 
 612                 case CNK_STRING:
 613                         cnk->strvalue = va_arg (args, char *);
 614                         if (!cnk->strvalue) cnk->strvalue = "(NULL)";
 615 
 616                         for (i = 1; i < clist[pnum].num; i++) {
 617                                 clist[pnum].chunks[i]->strvalue = cnk->strvalue;
 618                         }
 619                         break;
 620 
 621                 case CNK_PTR:
 622                         cnk->strvalue = va_arg (args, void *);
 623                         for (i = 1; i < clist[pnum].num; i++) {
 624                                 clist[pnum].chunks[i]->strvalue = cnk->strvalue;
 625                         }
 626                         break;
 627 
 628                 case CNK_NUM:
 629                         if (cnk->cflags == DP_C_CHAR)
 630                                 cnk->pnum = va_arg (args, char *);
 631                         else if (cnk->cflags == DP_C_SHORT)
 632                                 cnk->pnum = va_arg (args, short int *);
 633                         else if (cnk->cflags == DP_C_LONG)
 634                                 cnk->pnum = va_arg (args, long int *);
 635                         else if (cnk->cflags == DP_C_LLONG)
 636                                 cnk->pnum = va_arg (args, LLONG *);
 637                         else if (cnk->cflags == DP_C_SIZET)
 638                                 cnk->pnum = va_arg (args, ssize_t *);
 639                         else
 640                                 cnk->pnum = va_arg (args, int *);
 641 
 642                         for (i = 1; i < clist[pnum].num; i++) {
 643                                 clist[pnum].chunks[i]->pnum = cnk->pnum;
 644                         }
 645                         break;
 646 
 647                 case CNK_PRCNT:
 648                         break;
 649 
 650                 default:
 651                         /* what ?? */
 652                         goto done;
 653                 }
 654         }
 655         /* print out the actual string from chunks */
 656         currlen = 0;
 657         cnk = chunks;
 658         while (cnk) {
 659                 int len, min, max;
 660 
 661                 if (cnk->min_star) min = cnk->min_star->value;
 662                 else min = cnk->min;
 663                 if (cnk->max_star) max = cnk->max_star->value;
 664                 else max = cnk->max;
 665 
 666                 switch (cnk->type) {
 667 
 668                 case CNK_FMT_STR:
 669                         if (maxlen != 0 && maxlen > currlen) {
 670                                 if (maxlen > (currlen + cnk->len)) len = cnk->len;
 671                                 else len = maxlen - currlen;
 672 
 673                                 memcpy(&(buffer[currlen]), &(base[cnk->start]), len);
 674                         }
 675                         currlen += cnk->len;
 676                                 
 677                         break;
 678 
 679                 case CNK_INT:
 680                 case CNK_UINT:
 681                         fmtint (buffer, &currlen, maxlen, cnk->value, 10, min, max, cnk->flags);
 682                         break;
 683 
 684                 case CNK_OCTAL:
 685                         fmtint (buffer, &currlen, maxlen, cnk->value, 8, min, max, cnk->flags);
 686                         break;
 687 
 688                 case CNK_HEX:
 689                         fmtint (buffer, &currlen, maxlen, cnk->value, 16, min, max, cnk->flags);
 690                         break;
 691 
 692                 case CNK_FLOAT:
 693                         fmtfp (buffer, &currlen, maxlen, cnk->fvalue, min, max, cnk->flags);
 694                         break;
 695 
 696                 case CNK_CHAR:
 697                         dopr_outch (buffer, &currlen, maxlen, cnk->value);
 698                         break;
 699 
 700                 case CNK_STRING:
 701                         if (max == -1) {
 702                                 max = strlen(cnk->strvalue);
 703                         }
 704                         fmtstr (buffer, &currlen, maxlen, cnk->strvalue, cnk->flags, min, max);
 705                         break;
 706 
 707                 case CNK_PTR:
 708                         fmtint (buffer, &currlen, maxlen, (long)(cnk->strvalue), 16, min, max, cnk->flags);
 709                         break;
 710 
 711                 case CNK_NUM:
 712                         if (cnk->cflags == DP_C_CHAR)
 713                                 *((char *)(cnk->pnum)) = (char)currlen;
 714                         else if (cnk->cflags == DP_C_SHORT)
 715                                 *((short int *)(cnk->pnum)) = (short int)currlen;
 716                         else if (cnk->cflags == DP_C_LONG)
 717                                 *((long int *)(cnk->pnum)) = (long int)currlen;
 718                         else if (cnk->cflags == DP_C_LLONG)
 719                                 *((LLONG *)(cnk->pnum)) = (LLONG)currlen;
 720                         else if (cnk->cflags == DP_C_SIZET)
 721                                 *((ssize_t *)(cnk->pnum)) = (ssize_t)currlen;
 722                         else
 723                                 *((int *)(cnk->pnum)) = (int)currlen;
 724                         break;
 725 
 726                 case CNK_PRCNT:
 727                         dopr_outch (buffer, &currlen, maxlen, '%');
 728                         break;
 729 
 730                 default:
 731                         /* what ?? */
 732                         goto done;
 733                 }
 734                 cnk = cnk->next;
 735         }
 736         if (maxlen != 0) {
 737                 if (currlen < maxlen - 1) 
 738                         buffer[currlen] = '\0';
 739                 else if (maxlen > 0) 
 740                         buffer[maxlen - 1] = '\0';
 741         }
 742         ret = currlen;
 743 
 744 done:
 745         va_end(args);
 746 
 747         while (chunks) {
 748                 cnk = chunks->next;
 749                 free(chunks);
 750                 chunks = cnk;
 751         }
 752         if (clist) {
 753                 for (pnum = 0; pnum < max_pos; pnum++) {
 754                         if (clist[pnum].chunks) free(clist[pnum].chunks);
 755                 }
 756                 free(clist);
 757         }
 758         return ret;
 759 }
 760 
 761 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
     /* [<][>][^][v][top][bottom][index][help] */
 762                     char *value, int flags, int min, int max)
 763 {
 764         int padlen, strln;     /* amount to pad */
 765         int cnt = 0;
 766 
 767 #ifdef DEBUG_SNPRINTF
 768         printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
 769 #endif
 770         if (value == 0) {
 771                 value = "<NULL>";
 772         }
 773 
 774         for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
 775         padlen = min - strln;
 776         if (padlen < 0) 
 777                 padlen = 0;
 778         if (flags & DP_F_MINUS) 
 779                 padlen = -padlen; /* Left Justify */
 780         
 781         while (padlen > 0) {
 782                 dopr_outch (buffer, currlen, maxlen, ' ');
 783                 --padlen;
 784         }
 785         while (*value && (cnt < max)) {
 786                 dopr_outch (buffer, currlen, maxlen, *value++);
 787                 ++cnt;
 788         }
 789         while (padlen < 0) {
 790                 dopr_outch (buffer, currlen, maxlen, ' ');
 791                 ++padlen;
 792         }
 793 }
 794 
 795 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
 796 
 797 static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
     /* [<][>][^][v][top][bottom][index][help] */
 798                     LLONG value, int base, int min, int max, int flags)
 799 {
 800         int signvalue = 0;
 801         unsigned LLONG uvalue;
 802         char convert[20];
 803         int place = 0;
 804         int spadlen = 0; /* amount to space pad */
 805         int zpadlen = 0; /* amount to zero pad */
 806         int caps = 0;
 807         
 808         if (max < 0)
 809                 max = 0;
 810         
 811         uvalue = value;
 812         
 813         if(!(flags & DP_F_UNSIGNED)) {
 814                 if( value < 0 ) {
 815                         signvalue = '-';
 816                         uvalue = -value;
 817                 } else {
 818                         if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
 819                                 signvalue = '+';
 820                         else if (flags & DP_F_SPACE)
 821                                 signvalue = ' ';
 822                 }
 823         }
 824   
 825         if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
 826 
 827         do {
 828                 convert[place++] =
 829                         (caps? "0123456789ABCDEF":"0123456789abcdef")
 830                         [uvalue % (unsigned)base  ];
 831                 uvalue = (uvalue / (unsigned)base );
 832         } while(uvalue && (place < 20));
 833         if (place == 20) place--;
 834         convert[place] = 0;
 835 
 836         zpadlen = max - place;
 837         spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
 838         if (zpadlen < 0) zpadlen = 0;
 839         if (spadlen < 0) spadlen = 0;
 840         if (flags & DP_F_ZERO) {
 841                 zpadlen = MAX(zpadlen, spadlen);
 842                 spadlen = 0;
 843         }
 844         if (flags & DP_F_MINUS) 
 845                 spadlen = -spadlen; /* Left Justifty */
 846 
 847 #ifdef DEBUG_SNPRINTF
 848         printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
 849                zpadlen, spadlen, min, max, place);
 850 #endif
 851 
 852         /* Spaces */
 853         while (spadlen > 0) {
 854                 dopr_outch (buffer, currlen, maxlen, ' ');
 855                 --spadlen;
 856         }
 857 
 858         /* Sign */
 859         if (signvalue) 
 860                 dopr_outch (buffer, currlen, maxlen, signvalue);
 861 
 862         /* Zeros */
 863         if (zpadlen > 0) {
 864                 while (zpadlen > 0) {
 865                         dopr_outch (buffer, currlen, maxlen, '0');
 866                         --zpadlen;
 867                 }
 868         }
 869 
 870         /* Digits */
 871         while (place > 0) 
 872                 dopr_outch (buffer, currlen, maxlen, convert[--place]);
 873   
 874         /* Left Justified spaces */
 875         while (spadlen < 0) {
 876                 dopr_outch (buffer, currlen, maxlen, ' ');
 877                 ++spadlen;
 878         }
 879 }
 880 
 881 static LDOUBLE abs_val(LDOUBLE value)
     /* [<][>][^][v][top][bottom][index][help] */
 882 {
 883         LDOUBLE result = value;
 884 
 885         if (value < 0)
 886                 result = -value;
 887         
 888         return result;
 889 }
 890 
 891 static LDOUBLE POW10(int exp)
     /* [<][>][^][v][top][bottom][index][help] */
 892 {
 893         LDOUBLE result = 1;
 894         
 895         while (exp) {
 896                 result *= 10;
 897                 exp--;
 898         }
 899   
 900         return result;
 901 }
 902 
 903 static LLONG ROUND(LDOUBLE value)
     /* [<][>][^][v][top][bottom][index][help] */
 904 {
 905         LLONG intpart;
 906 
 907         intpart = (LLONG)value;
 908         value = value - intpart;
 909         if (value >= 0.5) intpart++;
 910         
 911         return intpart;
 912 }
 913 
 914 /* a replacement for modf that doesn't need the math library. Should
 915    be portable, but slow */
 916 static double my_modf(double x0, double *iptr)
     /* [<][>][^][v][top][bottom][index][help] */
 917 {
 918         int i;
 919         LLONG l=0;
 920         double x = x0;
 921         double f = 1.0;
 922 
 923         for (i=0;i<100;i++) {
 924                 l = (long)x;
 925                 if (l <= (x+1) && l >= (x-1)) break;
 926                 x *= 0.1;
 927                 f *= 10.0;
 928         }
 929 
 930         if (i == 100) {
 931                 /* yikes! the number is beyond what we can handle. What do we do? */
 932                 (*iptr) = 0;
 933                 return 0;
 934         }
 935 
 936         if (i != 0) {
 937                 double i2;
 938                 double ret;
 939 
 940                 ret = my_modf(x0-l*f, &i2);
 941                 (*iptr) = l*f + i2;
 942                 return ret;
 943         } 
 944 
 945         (*iptr) = l;
 946         return x - (*iptr);
 947 }
 948 
 949 
 950 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
     /* [<][>][^][v][top][bottom][index][help] */
 951                    LDOUBLE fvalue, int min, int max, int flags)
 952 {
 953         int signvalue = 0;
 954         double ufvalue;
 955         char iconvert[311];
 956         char fconvert[311];
 957         int iplace = 0;
 958         int fplace = 0;
 959         int padlen = 0; /* amount to pad */
 960         int zpadlen = 0; 
 961         int caps = 0;
 962         int idx;
 963         double intpart;
 964         double fracpart;
 965         double temp;
 966   
 967         /* 
 968          * AIX manpage says the default is 0, but Solaris says the default
 969          * is 6, and sprintf on AIX defaults to 6
 970          */
 971         if (max < 0)
 972                 max = 6;
 973 
 974         ufvalue = abs_val (fvalue);
 975 
 976         if (fvalue < 0) {
 977                 signvalue = '-';
 978         } else {
 979                 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
 980                         signvalue = '+';
 981                 } else {
 982                         if (flags & DP_F_SPACE)
 983                                 signvalue = ' ';
 984                 }
 985         }
 986 
 987 #if 0
 988         if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
 989 #endif
 990 
 991 #if 0
 992          if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
 993 #endif
 994 
 995         /* 
 996          * Sorry, we only support 9 digits past the decimal because of our 
 997          * conversion method
 998          */
 999         if (max > 9)
1000                 max = 9;
1001 
1002         /* We "cheat" by converting the fractional part to integer by
1003          * multiplying by a factor of 10
1004          */
1005 
1006         temp = ufvalue;
1007         my_modf(temp, &intpart);
1008 
1009         fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
1010         
1011         if (fracpart >= POW10(max)) {
1012                 intpart++;
1013                 fracpart -= POW10(max);
1014         }
1015 
1016 
1017         /* Convert integer part */
1018         do {
1019                 temp = intpart*0.1;
1020                 my_modf(temp, &intpart);
1021                 idx = (int) ((temp -intpart +0.05)* 10.0);
1022                 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
1023                 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */
1024                 iconvert[iplace++] =
1025                         (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
1026         } while (intpart && (iplace < 311));
1027         if (iplace == 311) iplace--;
1028         iconvert[iplace] = 0;
1029 
1030         /* Convert fractional part */
1031         if (fracpart)
1032         {
1033                 do {
1034                         temp = fracpart*0.1;
1035                         my_modf(temp, &fracpart);
1036                         idx = (int) ((temp -fracpart +0.05)* 10.0);
1037                         /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
1038                         /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
1039                         fconvert[fplace++] =
1040                         (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
1041                 } while(fracpart && (fplace < 311));
1042                 if (fplace == 311) fplace--;
1043         }
1044         fconvert[fplace] = 0;
1045   
1046         /* -1 for decimal point, another -1 if we are printing a sign */
1047         padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 
1048         zpadlen = max - fplace;
1049         if (zpadlen < 0) zpadlen = 0;
1050         if (padlen < 0) 
1051                 padlen = 0;
1052         if (flags & DP_F_MINUS) 
1053                 padlen = -padlen; /* Left Justifty */
1054         
1055         if ((flags & DP_F_ZERO) && (padlen > 0)) {
1056                 if (signvalue) {
1057                         dopr_outch (buffer, currlen, maxlen, signvalue);
1058                         --padlen;
1059                         signvalue = 0;
1060                 }
1061                 while (padlen > 0) {
1062                         dopr_outch (buffer, currlen, maxlen, '0');
1063                         --padlen;
1064                 }
1065         }
1066         while (padlen > 0) {
1067                 dopr_outch (buffer, currlen, maxlen, ' ');
1068                 --padlen;
1069         }
1070         if (signvalue) 
1071                 dopr_outch (buffer, currlen, maxlen, signvalue);
1072         
1073         while (iplace > 0) 
1074                 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
1075 
1076 #ifdef DEBUG_SNPRINTF
1077         printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
1078 #endif
1079 
1080         /*
1081          * Decimal point.  This should probably use locale to find the correct
1082          * char to print out.
1083          */
1084         if (max > 0) {
1085                 dopr_outch (buffer, currlen, maxlen, '.');
1086                 
1087                 while (zpadlen > 0) {
1088                         dopr_outch (buffer, currlen, maxlen, '0');
1089                         --zpadlen;
1090                 }
1091 
1092                 while (fplace > 0) 
1093                         dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
1094         }
1095 
1096         while (padlen < 0) {
1097                 dopr_outch (buffer, currlen, maxlen, ' ');
1098                 ++padlen;
1099         }
1100 }
1101 
1102 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
     /* [<][>][^][v][top][bottom][index][help] */
1103 {
1104         if (*currlen < maxlen) {
1105                 buffer[(*currlen)] = c;
1106         }
1107         (*currlen)++;
1108 }
1109 
1110 static struct pr_chunk *new_chunk(void) {
     /* [<][>][^][v][top][bottom][index][help] */
1111         struct pr_chunk *new_c = (struct pr_chunk *)malloc(sizeof(struct pr_chunk));
1112 
1113         if (!new_c)
1114                 return NULL;
1115 
1116         new_c->type = 0;
1117         new_c->num = 0;
1118         new_c->min = 0;
1119         new_c->min_star = NULL;
1120         new_c->max = -1;
1121         new_c->max_star = NULL;
1122         new_c->flags = 0;
1123         new_c->cflags = 0;
1124         new_c->start = 0;
1125         new_c->len = 0;
1126         new_c->value = 0;
1127         new_c->fvalue = 0;
1128         new_c->strvalue = NULL;
1129         new_c->pnum = NULL;
1130         new_c->next = NULL;
1131 
1132         return new_c;
1133 }
1134 
1135 static int add_cnk_list_entry(struct pr_chunk_x **list,
     /* [<][>][^][v][top][bottom][index][help] */
1136                                 int max_num, struct pr_chunk *chunk) {
1137         struct pr_chunk_x *l;
1138         struct pr_chunk **c;
1139         int max;
1140         int cnum;
1141         int i, pos;
1142 
1143         if (chunk->num > max_num) {
1144                 max = chunk->num;
1145         
1146                 if (*list == NULL) {
1147                         l = (struct pr_chunk_x *)malloc(sizeof(struct pr_chunk_x) * max);
1148                         pos = 0;
1149                 } else {
1150                         l = (struct pr_chunk_x *)realloc(*list, sizeof(struct pr_chunk_x) * max);
1151                         pos = max_num;
1152                 }
1153                 if (l == NULL) {
1154                         for (i = 0; i < max; i++) {
1155                                 if ((*list)[i].chunks) free((*list)[i].chunks);
1156                         }
1157                         return 0;
1158                 }
1159                 for (i = pos; i < max; i++) {
1160                         l[i].chunks = NULL;
1161                         l[i].num = 0;
1162                 }
1163         } else {
1164                 l = *list;
1165                 max = max_num;
1166         }
1167 
1168         i = chunk->num - 1;
1169         cnum = l[i].num + 1;
1170         if (l[i].chunks == NULL) {
1171                 c = (struct pr_chunk **)malloc(sizeof(struct pr_chunk *) * cnum); 
1172         } else {
1173                 c = (struct pr_chunk **)realloc(l[i].chunks, sizeof(struct pr_chunk *) * cnum);
1174         }
1175         if (c == NULL) {
1176                 for (i = 0; i < max; i++) {
1177                         if (l[i].chunks) free(l[i].chunks);
1178                 }
1179                 return 0;
1180         }
1181         c[l[i].num] = chunk;
1182         l[i].chunks = c;
1183         l[i].num = cnum;
1184 
1185         *list = l;
1186         return max;
1187 }
1188 
1189  int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
     /* [<][>][^][v][top][bottom][index][help] */
1190 {
1191         return dopr(str, count, fmt, args);
1192 }
1193 #endif
1194 
1195 /* yes this really must be a ||. Don't muck with this (tridge)
1196  *
1197  * The logic for these two is that we need our own definition if the
1198  * OS *either* has no definition of *sprintf, or if it does have one
1199  * that doesn't work properly according to the autoconf test.
1200  */
1201 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
1202  int snprintf(char *str,size_t count,const char *fmt,...)
     /* [<][>][^][v][top][bottom][index][help] */
1203 {
1204         size_t ret;
1205         va_list ap;
1206     
1207         va_start(ap, fmt);
1208         ret = vsnprintf(str, count, fmt, ap);
1209         va_end(ap);
1210         return ret;
1211 }
1212 #endif
1213 
1214 #ifndef HAVE_C99_VSNPRINTF
1215  int printf(const char *fmt, ...)
     /* [<][>][^][v][top][bottom][index][help] */
1216 {
1217         va_list ap;
1218         int ret;
1219         char *s;
1220 
1221         s = NULL;
1222         va_start(ap, fmt);
1223         ret = vasprintf(&s, fmt, ap);
1224         va_end(ap);
1225 
1226         if (s) {
1227                 fwrite(s, 1, strlen(s), stdout);
1228         }
1229         free(s);
1230 
1231         return ret;
1232 }
1233 #endif
1234 
1235 #ifndef HAVE_C99_VSNPRINTF
1236  int fprintf(FILE *stream, const char *fmt, ...)
     /* [<][>][^][v][top][bottom][index][help] */
1237 {
1238         va_list ap;
1239         int ret;
1240         char *s;
1241 
1242         s = NULL;
1243         va_start(ap, fmt);
1244         ret = vasprintf(&s, fmt, ap);
1245         va_end(ap);
1246 
1247         if (s) {
1248                 fwrite(s, 1, strlen(s), stream);
1249         }
1250         free(s);
1251 
1252         return ret;
1253 }
1254 #endif
1255 
1256 #endif 
1257 
1258 #ifndef HAVE_VASPRINTF
1259  int vasprintf(char **ptr, const char *format, va_list ap)
     /* [<][>][^][v][top][bottom][index][help] */
1260 {
1261         int ret;
1262         va_list ap2;
1263 
1264         VA_COPY(ap2, ap);
1265         ret = vsnprintf(NULL, 0, format, ap2);
1266         va_end(ap2);
1267         if (ret < 0) return ret;
1268 
1269         (*ptr) = (char *)malloc(ret+1);
1270         if (!*ptr) return -1;
1271 
1272         VA_COPY(ap2, ap);
1273         ret = vsnprintf(*ptr, ret+1, format, ap2);
1274         va_end(ap2);
1275 
1276         return ret;
1277 }
1278 #endif
1279 
1280 
1281 #ifndef HAVE_ASPRINTF
1282  int asprintf(char **ptr, const char *format, ...)
     /* [<][>][^][v][top][bottom][index][help] */
1283 {
1284         va_list ap;
1285         int ret;
1286         
1287         *ptr = NULL;
1288         va_start(ap, format);
1289         ret = vasprintf(ptr, format, ap);
1290         va_end(ap);
1291 
1292         return ret;
1293 }
1294 #endif
1295 
1296 #ifdef TEST_SNPRINTF
1297 
1298  int sprintf(char *str,const char *fmt,...);
1299  int printf(const char *fmt,...);
1300 
1301  int main (void)
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1302 {
1303         char buf1[1024];
1304         char buf2[1024];
1305         char *buf3;
1306         char *fp_fmt[] = {
1307                 "%1.1f",
1308                 "%-1.5f",
1309                 "%1.5f",
1310                 "%123.9f",
1311                 "%10.5f",
1312                 "% 10.5f",
1313                 "%+22.9f",
1314                 "%+4.9f",
1315                 "%01.3f",
1316                 "%4f",
1317                 "%3.1f",
1318                 "%3.2f",
1319                 "%.0f",
1320                 "%f",
1321                 "%-8.8f",
1322                 "%-9.9f",
1323                 NULL
1324         };
1325         double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 203.9, 0.96, 0.996, 
1326                              0.9996, 1.996, 4.136, 5.030201, 0.00205,
1327                              /* END LIST */ 0};
1328         char *int_fmt[] = {
1329                 "%-1.5d",
1330                 "%1.5d",
1331                 "%123.9d",
1332                 "%5.5d",
1333                 "%10.5d",
1334                 "% 10.5d",
1335                 "%+22.33d",
1336                 "%01.3d",
1337                 "%4d",
1338                 "%d",
1339                 NULL
1340         };
1341         long int_nums[] = { -1, 134, 91340, 341, 0203, 1234567890, 0};
1342         char *str_fmt[] = {
1343                 "%10.5s",
1344                 "%-10.5s",
1345                 "%5.10s",
1346                 "%-5.10s",
1347                 "%10.1s",
1348                 "%0.10s",
1349                 "%10.0s",
1350                 "%1.10s",
1351                 "%s",
1352                 "%.1s",
1353                 "%.10s",
1354                 "%10s",
1355                 NULL
1356         };
1357         char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
1358 #ifdef HAVE_LONG_LONG
1359         char *ll_fmt[] = {
1360                 "%llu",
1361                 NULL
1362         };
1363         LLONG ll_nums[] = { 134, 91340, 341, 0203, 1234567890, 128006186140000000LL, 0};
1364 #endif
1365         int x, y;
1366         int fail = 0;
1367         int num = 0;
1368         int l1, l2;
1369         char *ss_fmt[] = {
1370                 "%zd",
1371                 "%zu",
1372                 NULL
1373         };
1374         size_t ss_nums[] = {134, 91340, 123456789, 0203, 1234567890, 0};
1375 
1376         printf ("Testing snprintf format codes against system sprintf...\n");
1377 
1378         for (x = 0; fp_fmt[x] ; x++) {
1379                 for (y = 0; fp_nums[y] != 0 ; y++) {
1380                         buf1[0] = buf2[0] = '\0';
1381                         l1 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
1382                         l2 = sprintf (buf2, fp_fmt[x], fp_nums[y]);
1383                         buf1[1023] = buf2[1023] = '\0';
1384                         if (strcmp (buf1, buf2) || (l1 != l2)) {
1385                                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
1386                                        fp_fmt[x], l1, buf1, l2, buf2);
1387                                 fail++;
1388                         }
1389                         num++;
1390                 }
1391         }
1392 
1393         for (x = 0; int_fmt[x] ; x++) {
1394                 for (y = 0; int_nums[y] != 0 ; y++) {
1395                         buf1[0] = buf2[0] = '\0';
1396                         l1 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
1397                         l2 = sprintf (buf2, int_fmt[x], int_nums[y]);
1398                         buf1[1023] = buf2[1023] = '\0';
1399                         if (strcmp (buf1, buf2) || (l1 != l2)) {
1400                                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
1401                                        int_fmt[x], l1, buf1, l2, buf2);
1402                                 fail++;
1403                         }
1404                         num++;
1405                 }
1406         }
1407 
1408         for (x = 0; str_fmt[x] ; x++) {
1409                 for (y = 0; str_vals[y] != 0 ; y++) {
1410                         buf1[0] = buf2[0] = '\0';
1411                         l1 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
1412                         l2 = sprintf (buf2, str_fmt[x], str_vals[y]);
1413                         buf1[1023] = buf2[1023] = '\0';
1414                         if (strcmp (buf1, buf2) || (l1 != l2)) {
1415                                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
1416                                        str_fmt[x], l1, buf1, l2, buf2);
1417                                 fail++;
1418                         }
1419                         num++;
1420                 }
1421         }
1422 
1423 #ifdef HAVE_LONG_LONG
1424         for (x = 0; ll_fmt[x] ; x++) {
1425                 for (y = 0; ll_nums[y] != 0 ; y++) {
1426                         buf1[0] = buf2[0] = '\0';
1427                         l1 = snprintf(buf1, sizeof(buf1), ll_fmt[x], ll_nums[y]);
1428                         l2 = sprintf (buf2, ll_fmt[x], ll_nums[y]);
1429                         buf1[1023] = buf2[1023] = '\0';
1430                         if (strcmp (buf1, buf2) || (l1 != l2)) {
1431                                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
1432                                        ll_fmt[x], l1, buf1, l2, buf2);
1433                                 fail++;
1434                         }
1435                         num++;
1436                 }
1437         }
1438 #endif
1439 
1440 #define BUFSZ 2048
1441 
1442         buf1[0] = buf2[0] = '\0';
1443         if ((buf3 = malloc(BUFSZ)) == NULL) {
1444                 fail++;
1445         } else {
1446                 num++;
1447                 memset(buf3, 'a', BUFSZ);
1448                 snprintf(buf1, sizeof(buf1), "%.*s", 1, buf3);
1449                 buf1[1023] = '\0';
1450                 if (strcmp(buf1, "a") != 0) {
1451                         printf("length limit buf1 '%s' expected 'a'\n", buf1);
1452                         fail++;
1453                 }
1454         }
1455 
1456         buf1[0] = buf2[0] = '\0';
1457         l1 = snprintf(buf1, sizeof(buf1), "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
1458         l2 = sprintf(buf2, "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
1459         buf1[1023] = buf2[1023] = '\0';
1460         if (strcmp(buf1, buf2) || (l1 != l2)) {
1461                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1462                                 "%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
1463                 fail++;
1464         }
1465 
1466         buf1[0] = buf2[0] = '\0';
1467         l1 = snprintf(buf1, sizeof(buf1), "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
1468         l2 = sprintf(buf2, "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
1469         buf1[1023] = buf2[1023] = '\0';
1470         if (strcmp(buf1, buf2)) {
1471                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1472                                 "%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
1473                 fail++;
1474         }
1475 
1476         for (x = 0; ss_fmt[x] ; x++) {
1477                 for (y = 0; ss_nums[y] != 0 ; y++) {
1478                         buf1[0] = buf2[0] = '\0';
1479                         l1 = snprintf(buf1, sizeof(buf1), ss_fmt[x], ss_nums[y]);
1480                         l2 = sprintf (buf2, ss_fmt[x], ss_nums[y]);
1481                         buf1[1023] = buf2[1023] = '\0';
1482                         if (strcmp (buf1, buf2) || (l1 != l2)) {
1483                                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", 
1484                                        ss_fmt[x], l1, buf1, l2, buf2);
1485                                 fail++;
1486                         }
1487                         num++;
1488                 }
1489         }
1490 #if 0
1491         buf1[0] = buf2[0] = '\0';
1492         l1 = snprintf(buf1, sizeof(buf1), "%lld", (LLONG)1234567890);
1493         l2 = sprintf(buf2, "%lld", (LLONG)1234567890);
1494         buf1[1023] = buf2[1023] = '\0';
1495         if (strcmp(buf1, buf2)) {
1496                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1497                                 "%lld", l1, buf1, l2, buf2);
1498                 fail++;
1499         }
1500 
1501         buf1[0] = buf2[0] = '\0';
1502         l1 = snprintf(buf1, sizeof(buf1), "%Lf", (LDOUBLE)890.1234567890123);
1503         l2 = sprintf(buf2, "%Lf", (LDOUBLE)890.1234567890123);
1504         buf1[1023] = buf2[1023] = '\0';
1505         if (strcmp(buf1, buf2)) {
1506                 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1507                                 "%Lf", l1, buf1, l2, buf2);
1508                 fail++;
1509         }
1510 #endif
1511         printf ("%d tests failed out of %d.\n", fail, num);
1512 
1513         printf("seeing how many digits we support\n");
1514         {
1515                 double v0 = 0.12345678901234567890123456789012345678901;
1516                 for (x=0; x<100; x++) {
1517                         double p = pow(10, x); 
1518                         double r = v0*p;
1519                         snprintf(buf1, sizeof(buf1), "%1.1f", r);
1520                         sprintf(buf2,                "%1.1f", r);
1521                         if (strcmp(buf1, buf2)) {
1522                                 printf("we seem to support %d digits\n", x-1);
1523                                 break;
1524                         }
1525                 }
1526         }
1527 
1528         return 0;
1529 }
1530 #endif /* TEST_SNPRINTF */

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