lib/snprintf.c

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