dlls/msvcrt/string.c

   1 /*
   2  * MSVCRT string functions
   3  *
   4  * Copyright 1996,1998 Marcus Meissner
   5  * Copyright 1996 Jukka Iivonen
   6  * Copyright 1997,2000 Uwe Bonnes
   7  * Copyright 2000 Jon Griffiths
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #define _ISOC99_SOURCE
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <math.h>
  31 #include <limits.h>
  32 #include <errno.h>
  33 #include "msvcrt.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  37
  38 /*********************************************************************
  39  *              _mbsdup (MSVCRT.@)
  40  *              _strdup (MSVCRT.@)
  41  */
  42 char* CDECL _strdup(const char* str)
  43 {
  44     if(str)
  45     {
  46       char * ret = MSVCRT_malloc(strlen(str)+1);
  47       if (ret) strcpy( ret, str );
  48       return ret;
  49     }
  50     else return 0;
  51 }
  52
  53 /*********************************************************************
  54  *              _strlwr_s (MSVCRT.@)
  55  */
  56 int CDECL _strlwr_s(char *str, MSVCRT_size_t len)
  57 {
  58     char *ptr = str;
  59
  60     if (!str || !len)
  61     {
  62         *MSVCRT__errno() = MSVCRT_EINVAL;
  63         return MSVCRT_EINVAL;
  64     }
  65
  66     while (len && *ptr)
  67     {
  68         len--;
  69         ptr++;
  70     }
  71
  72     if (!len)
  73     {
  74         str[0] = '\0';
  75         *MSVCRT__errno() = MSVCRT_EINVAL;
  76         return MSVCRT_EINVAL;
  77     }
  78
  79     while (*str)
  80     {
  81         *str = tolower(*str);
  82         str++;
  83     }
  84
  85     return 0;
  86 }
  87
  88 /*********************************************************************
  89  *              _strnset (MSVCRT.@)
  90  */
  91 char* CDECL MSVCRT__strnset(char* str, int value, MSVCRT_size_t len)
  92 {
  93   if (len > 0 && str)
  94     while (*str && len--)
  95       *str++ = value;
  96   return str;
  97 }
  98
  99 /*********************************************************************
 100  *              _strrev (MSVCRT.@)
 101  */
 102 char* CDECL _strrev(char* str)
 103 {
 104   char * p1;
 105   char * p2;
 106
 107   if (str && *str)
 108     for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2)
 109     {
 110       *p1 ^= *p2;
 111       *p2 ^= *p1;
 112       *p1 ^= *p2;
 113     }
 114
 115   return str;
 116 }
 117
 118 /*********************************************************************
 119  *              _strset (MSVCRT.@)
 120  */
 121 char* CDECL _strset(char* str, int value)
 122 {
 123   char *ptr = str;
 124   while (*ptr)
 125     *ptr++ = value;
 126
 127   return str;
 128 }
 129
 130 /*********************************************************************
 131  *              strtok  (MSVCRT.@)
 132  */
 133 char * CDECL MSVCRT_strtok( char *str, const char *delim )
 134 {
 135     thread_data_t *data = msvcrt_get_thread_data();
 136     char *ret;
 137
 138     if (!str)
 139         if (!(str = data->strtok_next)) return NULL;
 140
 141     while (*str && strchr( delim, *str )) str++;
 142     if (!*str) return NULL;
 143     ret = str++;
 144     while (*str && !strchr( delim, *str )) str++;
 145     if (*str) *str++ = 0;
 146     data->strtok_next = str;
 147     return ret;
 148 }
 149
 150 /*********************************************************************
 151  *              strtok_s  (MSVCRT.@)
 152  */
 153 char * CDECL MSVCRT_strtok_s(char *str, const char *delim, char **ctx)
 154 {
 155     if (!MSVCRT_CHECK_PMT(delim != NULL) || !MSVCRT_CHECK_PMT(ctx != NULL) ||
 156         !MSVCRT_CHECK_PMT(str != NULL || *ctx != NULL)) {
 157         *MSVCRT__errno() = MSVCRT_EINVAL;
 158         return NULL;
 159     }
 160
 161     if(!str)
 162         str = *ctx;
 163
 164     while(*str && strchr(delim, *str))
 165         str++;
 166     if(!*str)
 167         return NULL;
 168
 169     *ctx = str+1;
 170     while(**ctx && !strchr(delim, **ctx))
 171         (*ctx)++;
 172     if(**ctx)
 173         *(*ctx)++ = 0;
 174
 175     return str;
 176 }
 177
 178 /*********************************************************************
 179  *              _swab (MSVCRT.@)
 180  */
 181 void CDECL MSVCRT__swab(char* src, char* dst, int len)
 182 {
 183   if (len > 1)
 184   {
 185     len = (unsigned)len >> 1;
 186
 187     while (len--) {
 188       char s0 = src[0];
 189       char s1 = src[1];
 190       *dst++ = s1;
 191       *dst++ = s0;
 192       src = src + 2;
 193     }
 194   }
 195 }
 196
 197 /*********************************************************************
 198  *              strtod_l  (MSVCRT.@)
 199  */
 200 double CDECL MSVCRT_strtod_l( const char *str, char **end, MSVCRT__locale_t locale)
 201 {
 202     unsigned __int64 d=0, hlp;
 203     unsigned fpcontrol;
 204     int exp=0, sign=1;
 205     const char *p;
 206     double ret;
 207     BOOL found_digit = FALSE;
 208
 209     if (!MSVCRT_CHECK_PMT(str != NULL)) {
 210         *MSVCRT__errno() = MSVCRT_EINVAL;
 211         return 0;
 212     }
 213
 214     if(!locale)
 215         locale = get_locale();
 216
 217     /* FIXME: use *_l functions */
 218     p = str;
 219     while(isspace(*p))
 220         p++;
 221
 222     if(*p == '-') {
 223         sign = -1;
 224         p++;
 225     } else  if(*p == '+')
 226         p++;
 227
 228     while(isdigit(*p)) {
 229         found_digit = TRUE;
 230         hlp = d*10+*(p++)-'0';
 231         if(d>MSVCRT_UI64_MAX/10 || hlp<d) {
 232             exp++;
 233             break;
 234         } else
 235             d = hlp;
 236     }
 237     while(isdigit(*p)) {
 238         exp++;
 239         p++;
 240     }
 241
 242     if(*p == *locale->locinfo->lconv->decimal_point)
 243         p++;
 244
 245     while(isdigit(*p)) {
 246         found_digit = TRUE;
 247         hlp = d*10+*(p++)-'0';
 248         if(d>MSVCRT_UI64_MAX/10 || hlp<d)
 249             break;
 250
 251         d = hlp;
 252         exp--;
 253     }
 254     while(isdigit(*p))
 255         p++;
 256
 257     if(!found_digit) {
 258         if(end)
 259             *end = (char*)str;
 260         return 0.0;
 261     }
 262
 263     if(*p=='e' || *p=='E' || *p=='d' || *p=='D') {
 264         int e=0, s=1;
 265
 266         p++;
 267         if(*p == '-') {
 268             s = -1;
 269             p++;
 270         } else if(*p == '+')
 271             p++;
 272
 273         if(isdigit(*p)) {
 274             while(isdigit(*p)) {
 275                 if(e>INT_MAX/10 || (e=e*10+*p-'0')<0)
 276                     e = INT_MAX;
 277                 p++;
 278             }
 279             e *= s;
 280
 281             if(exp<0 && e<0 && exp+e>=0) exp = INT_MIN;
 282             else if(exp>0 && e>0 && exp+e<0) exp = INT_MAX;
 283             else exp += e;
 284         } else {
 285             if(*p=='-' || *p=='+')
 286                 p--;
 287             p--;
 288         }
 289     }
 290
 291     fpcontrol = _control87(0, 0);
 292     _control87(MSVCRT__EM_DENORMAL|MSVCRT__EM_INVALID|MSVCRT__EM_ZERODIVIDE
 293             |MSVCRT__EM_OVERFLOW|MSVCRT__EM_UNDERFLOW|MSVCRT__EM_INEXACT, 0xffffffff);
 294
 295     if(exp>0)
 296         ret = (double)sign*d*pow(10, exp);
 297     else
 298         ret = (double)sign*d/pow(10, -exp);
 299
 300     _control87(fpcontrol, 0xffffffff);
 301
 302     if((d && ret==0.0) || isinf(ret))
 303         *MSVCRT__errno() = MSVCRT_ERANGE;
 304
 305     if(end)
 306         *end = (char*)p;
 307
 308     return ret;
 309 }
 310
 311 /*********************************************************************
 312  *              strtod  (MSVCRT.@)
 313  */
 314 double CDECL MSVCRT_strtod( const char *str, char **end )
 315 {
 316     return MSVCRT_strtod_l( str, end, NULL );
 317 }
 318
 319 /*********************************************************************
 320  *              atof  (MSVCRT.@)
 321  */
 322 double CDECL MSVCRT_atof( const char *str )
 323 {
 324     return MSVCRT_strtod_l(str, NULL, NULL);
 325 }
 326
 327 /*********************************************************************
 328  *              _atof_l  (MSVCRT.@)
 329  */
 330 double CDECL MSVCRT__atof_l( const char *str, MSVCRT__locale_t locale)
 331 {
 332     return MSVCRT_strtod_l(str, NULL, locale);
 333 }
 334
 335 /*********************************************************************
 336  *              strcoll (MSVCRT.@)
 337  */
 338 int CDECL MSVCRT_strcoll( const char* str1, const char* str2 )
 339 {
 340     /* FIXME: handle Windows locale */
 341     return strcoll( str1, str2 );
 342 }
 343
 344 /*********************************************************************
 345  *      strcpy_s (MSVCRT.@)
 346  */
 347 int CDECL MSVCRT_strcpy_s( char* dst, MSVCRT_size_t elem, const char* src )
 348 {
 349     MSVCRT_size_t i;
 350     if(!elem) return MSVCRT_EINVAL;
 351     if(!dst) return MSVCRT_EINVAL;
 352     if(!src)
 353     {
 354         dst[0] = '\0';
 355         return MSVCRT_EINVAL;
 356     }
 357
 358     for(i = 0; i < elem; i++)
 359     {
 360         if((dst[i] = src[i]) == '\0') return 0;
 361     }
 362     dst[0] = '\0';
 363     return MSVCRT_ERANGE;
 364 }
 365
 366 /*********************************************************************
 367  *      strcat_s (MSVCRT.@)
 368  */
 369 int CDECL MSVCRT_strcat_s( char* dst, MSVCRT_size_t elem, const char* src )
 370 {
 371     MSVCRT_size_t i, j;
 372     if(!dst) return MSVCRT_EINVAL;
 373     if(elem == 0) return MSVCRT_EINVAL;
 374     if(!src)
 375     {
 376         dst[0] = '\0';
 377         return MSVCRT_EINVAL;
 378     }
 379
 380     for(i = 0; i < elem; i++)
 381     {
 382         if(dst[i] == '\0')
 383         {
 384             for(j = 0; (j + i) < elem; j++)
 385             {
 386                 if((dst[j + i] = src[j]) == '\0') return 0;
 387             }
 388         }
 389     }
 390     /* Set the first element to 0, not the first element after the skipped part */
 391     dst[0] = '\0';
 392     return MSVCRT_ERANGE;
 393 }
 394
 395 /*********************************************************************
 396  *      strncat_s (MSVCRT.@)
 397  */
 398 int CDECL MSVCRT_strncat_s( char* dst, MSVCRT_size_t elem, const char* src, MSVCRT_size_t count )
 399 {
 400     MSVCRT_size_t i, j;
 401     if(!MSVCRT_CHECK_PMT(dst != 0) || !MSVCRT_CHECK_PMT(elem != 0))
 402         return MSVCRT_EINVAL;
 403     if(!MSVCRT_CHECK_PMT(src != 0))
 404     {
 405         dst[0] = '\0';
 406         return MSVCRT_EINVAL;
 407     }
 408
 409     for(i = 0; i < elem; i++)
 410     {
 411         if(dst[i] == '\0')
 412         {
 413             for(j = 0; (j + i) < elem; j++)
 414             {
 415                 if(count == MSVCRT__TRUNCATE && j + i == elem - 1)
 416                 {
 417                     dst[j + i] = '\0';
 418                     return MSVCRT_STRUNCATE;
 419                 }
 420                 if(j == count || (dst[j + i] = src[j]) == '\0')
 421                 {
 422                     dst[j + i] = '\0';
 423                     return 0;
 424                 }
 425             }
 426         }
 427     }
 428     /* Set the first element to 0, not the first element after the skipped part */
 429     dst[0] = '\0';
 430     return MSVCRT_ERANGE;
 431 }
 432
 433 /*********************************************************************
 434  *              strxfrm (MSVCRT.@)
 435  */
 436 MSVCRT_size_t CDECL MSVCRT_strxfrm( char *dest, const char *src, MSVCRT_size_t len )
 437 {
 438     /* FIXME: handle Windows locale */
 439     return strxfrm( dest, src, len );
 440 }
 441
 442 /*********************************************************************
 443  *              _stricoll (MSVCRT.@)
 444  */
 445 int CDECL MSVCRT__stricoll( const char* str1, const char* str2 )
 446 {
 447   /* FIXME: handle collates */
 448   TRACE("str1 %s str2 %s\n", debugstr_a(str1), debugstr_a(str2));
 449   return lstrcmpiA( str1, str2 );
 450 }
 451
 452 /********************************************************************
 453  *              _atoldbl (MSVCRT.@)
 454  */
 455 int CDECL MSVCRT__atoldbl(MSVCRT__LDOUBLE *value, const char *str)
 456 {
 457   /* FIXME needs error checking for huge/small values */
 458 #ifdef HAVE_STRTOLD
 459   TRACE("str %s value %p\n",str,value);
 460   value->x = strtold(str,0);
 461 #else
 462   FIXME("stub, str %s value %p\n",str,value);
 463 #endif
 464   return 0;
 465 }
 466
 467 /********************************************************************
 468  *              __STRINGTOLD (MSVCRT.@)
 469  */
 470 int CDECL __STRINGTOLD( MSVCRT__LDOUBLE *value, char **endptr, const char *str, int flags )
 471 {
 472 #ifdef HAVE_STRTOLD
 473     FIXME("%p %p %s %x partial stub\n", value, endptr, str, flags );
 474     value->x = strtold(str,endptr);
 475 #else
 476     FIXME("%p %p %s %x stub\n", value, endptr, str, flags );
 477 #endif
 478     return 0;
 479 }
 480
 481 /******************************************************************
 482  *              strtol (MSVCRT.@)
 483  */
 484 MSVCRT_long CDECL MSVCRT_strtol(const char* nptr, char** end, int base)
 485 {
 486     /* wrapper to forward libc error code to msvcrt's error codes */
 487     long ret;
 488
 489     errno = 0;
 490     ret = strtol(nptr, end, base);
 491     switch (errno)
 492     {
 493     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 494     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 495     default:
 496         /* cope with the fact that we may use 64bit long integers on libc
 497          * while msvcrt always uses 32bit long integers
 498          */
 499         if (ret > MSVCRT_LONG_MAX)
 500         {
 501             ret = MSVCRT_LONG_MAX;
 502             *MSVCRT__errno() = MSVCRT_ERANGE;
 503         }
 504         else if (ret < -MSVCRT_LONG_MAX - 1)
 505         {
 506             ret = -MSVCRT_LONG_MAX - 1;
 507             *MSVCRT__errno() = MSVCRT_ERANGE;
 508         }
 509         break;
 510     }
 511
 512     return ret;
 513 }
 514
 515 /******************************************************************
 516  *              strtoul (MSVCRT.@)
 517  */
 518 MSVCRT_ulong CDECL MSVCRT_strtoul(const char* nptr, char** end, int base)
 519 {
 520     /* wrapper to forward libc error code to msvcrt's error codes */
 521     unsigned long ret;
 522
 523     errno = 0;
 524     ret = strtoul(nptr, end, base);
 525     switch (errno)
 526     {
 527     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 528     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 529     default:
 530         /* cope with the fact that we may use 64bit long integers on libc
 531          * while msvcrt always uses 32bit long integers
 532          */
 533         if (ret > MSVCRT_ULONG_MAX)
 534         {
 535             ret = MSVCRT_ULONG_MAX;
 536             *MSVCRT__errno() = MSVCRT_ERANGE;
 537         }
 538         break;
 539     }
 540
 541     return ret;
 542 }
 543
 544 /******************************************************************
 545  *              strnlen (MSVCRT.@)
 546  */
 547 MSVCRT_size_t CDECL MSVCRT_strnlen(const char *s, MSVCRT_size_t maxlen)
 548 {
 549     MSVCRT_size_t i;
 550
 551     for(i=0; i<maxlen; i++)
 552         if(!s[i]) break;
 553
 554     return i;
 555 }
 556
 557 /*********************************************************************
 558  *  _strtoi64_l (MSVCRT.@)
 559  *
 560  * FIXME: locale parameter is ignored
 561  */
 562 __int64 CDECL MSVCRT_strtoi64_l(const char *nptr, char **endptr, int base, MSVCRT__locale_t locale)
 563 {
 564     BOOL negative = FALSE;
 565     __int64 ret = 0;
 566
 567     TRACE("(%s %p %d %p)\n", nptr, endptr, base, locale);
 568
 569     if (!MSVCRT_CHECK_PMT(nptr != NULL) || !MSVCRT_CHECK_PMT(base == 0 || base >= 2) ||
 570         !MSVCRT_CHECK_PMT(base <= 36)) {
 571         return 0;
 572     }
 573
 574     while(isspace(*nptr)) nptr++;
 575
 576     if(*nptr == '-') {
 577         negative = TRUE;
 578         nptr++;
 579     } else if(*nptr == '+')
 580         nptr++;
 581
 582     if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
 583         base = 16;
 584         nptr += 2;
 585     }
 586
 587     if(base == 0) {
 588         if(*nptr=='0')
 589             base = 8;
 590         else
 591             base = 10;
 592     }
 593
 594     while(*nptr) {
 595         char cur = tolower(*nptr);
 596         int v;
 597
 598         if(isdigit(cur)) {
 599             if(cur >= '0'+base)
 600                 break;
 601             v = cur-'0';
 602         } else {
 603             if(cur<'a' || cur>='a'+base-10)
 604                 break;
 605             v = cur-'a'+10;
 606         }
 607
 608         if(negative)
 609             v = -v;
 610
 611         nptr++;
 612
 613         if(!negative && (ret>MSVCRT_I64_MAX/base || ret*base>MSVCRT_I64_MAX-v)) {
 614             ret = MSVCRT_I64_MAX;
 615             *MSVCRT__errno() = MSVCRT_ERANGE;
 616         } else if(negative && (ret<MSVCRT_I64_MIN/base || ret*base<MSVCRT_I64_MIN-v)) {
 617             ret = MSVCRT_I64_MIN;
 618             *MSVCRT__errno() = MSVCRT_ERANGE;
 619         } else
 620             ret = ret*base + v;
 621     }
 622
 623     if(endptr)
 624         *endptr = (char*)nptr;
 625
 626     return ret;
 627 }
 628
 629 /*********************************************************************
 630  *  _strtoi64 (MSVCRT.@)
 631  */
 632 __int64 CDECL MSVCRT_strtoi64(const char *nptr, char **endptr, int base)
 633 {
 634     return MSVCRT_strtoi64_l(nptr, endptr, base, NULL);
 635 }
 636
 637 /*********************************************************************
 638  *  _strtoui64_l (MSVCRT.@)
 639  *
 640  * FIXME: locale parameter is ignored
 641  */
 642 unsigned __int64 CDECL MSVCRT_strtoui64_l(const char *nptr, char **endptr, int base, MSVCRT__locale_t locale)
 643 {
 644     BOOL negative = FALSE;
 645     unsigned __int64 ret = 0;
 646
 647     TRACE("(%s %p %d %p)\n", nptr, endptr, base, locale);
 648
 649     if (!MSVCRT_CHECK_PMT(nptr != NULL) || !MSVCRT_CHECK_PMT(base == 0 || base >= 2) ||
 650         !MSVCRT_CHECK_PMT(base <= 36)) {
 651         return 0;
 652     }
 653
 654     while(isspace(*nptr)) nptr++;
 655
 656     if(*nptr == '-') {
 657         negative = TRUE;
 658         nptr++;
 659     } else if(*nptr == '+')
 660         nptr++;
 661
 662     if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
 663         base = 16;
 664         nptr += 2;
 665     }
 666
 667     if(base == 0) {
 668         if(*nptr=='0')
 669             base = 8;
 670         else
 671             base = 10;
 672     }
 673
 674     while(*nptr) {
 675         char cur = tolower(*nptr);
 676         int v;
 677
 678         if(isdigit(cur)) {
 679             if(cur >= '0'+base)
 680                 break;
 681             v = *nptr-'0';
 682         } else {
 683             if(cur<'a' || cur>='a'+base-10)
 684                 break;
 685             v = cur-'a'+10;
 686         }
 687
 688         nptr++;
 689
 690         if(ret>MSVCRT_UI64_MAX/base || ret*base>MSVCRT_UI64_MAX-v) {
 691             ret = MSVCRT_UI64_MAX;
 692             *MSVCRT__errno() = MSVCRT_ERANGE;
 693         } else
 694             ret = ret*base + v;
 695     }
 696
 697     if(endptr)
 698         *endptr = (char*)nptr;
 699
 700     return negative ? -ret : ret;
 701 }
 702
 703 /*********************************************************************
 704  *  _strtoui64 (MSVCRT.@)
 705  */
 706 unsigned __int64 CDECL MSVCRT_strtoui64(const char *nptr, char **endptr, int base)
 707 {
 708     return MSVCRT_strtoui64_l(nptr, endptr, base, NULL);
 709 }
 710
 711 /*********************************************************************
 712  *  _ltoa_s (MSVCRT.@)
 713  */
 714 int CDECL _ltoa_s(MSVCRT_long value, char *str, MSVCRT_size_t size, int radix)
 715 {
 716     MSVCRT_ulong val;
 717     unsigned int digit;
 718     int is_negative;
 719     char buffer[33], *pos;
 720     size_t len;
 721
 722     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 723         !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
 724     {
 725         if (str && size)
 726             str[0] = '\0';
 727
 728         *MSVCRT__errno() = MSVCRT_EINVAL;
 729         return MSVCRT_EINVAL;
 730     }
 731
 732     if (value < 0 && radix == 10)
 733     {
 734         is_negative = 1;
 735         val = -value;
 736     }
 737     else
 738     {
 739         is_negative = 0;
 740         val = value;
 741     }
 742
 743     pos = buffer + 32;
 744     *pos = '\0';
 745
 746     do
 747     {
 748         digit = val % radix;
 749         val /= radix;
 750
 751         if (digit < 10)
 752             *--pos = '0' + digit;
 753         else
 754             *--pos = 'a' + digit - 10;
 755     }
 756     while (val != 0);
 757
 758     if (is_negative)
 759         *--pos = '-';
 760
 761     len = buffer + 33 - pos;
 762     if (len > size)
 763     {
 764         size_t i;
 765         char *p = str;
 766
 767         /* Copy the temporary buffer backwards up to the available number of
 768          * characters. Don't copy the negative sign if present. */
 769
 770         if (is_negative)
 771         {
 772             p++;
 773             size--;
 774         }
 775
 776         for (pos = buffer + 31, i = 0; i < size; i++)
 777             *p++ = *pos--;
 778
 779         str[0] = '\0';
 780         MSVCRT_INVALID_PMT("str[size] is too small");
 781         *MSVCRT__errno() = MSVCRT_ERANGE;
 782         return MSVCRT_ERANGE;
 783     }
 784
 785     memcpy(str, pos, len);
 786     return 0;
 787 }
 788
 789 /*********************************************************************
 790  *  _ltow_s (MSVCRT.@)
 791  */
 792 int CDECL _ltow_s(MSVCRT_long value, MSVCRT_wchar_t *str, MSVCRT_size_t size, int radix)
 793 {
 794     MSVCRT_ulong val;
 795     unsigned int digit;
 796     int is_negative;
 797     MSVCRT_wchar_t buffer[33], *pos;
 798     size_t len;
 799
 800     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 801         !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
 802     {
 803         if (str && size)
 804             str[0] = '\0';
 805
 806         *MSVCRT__errno() = MSVCRT_EINVAL;
 807         return MSVCRT_EINVAL;
 808     }
 809
 810     if (value < 0 && radix == 10)
 811     {
 812         is_negative = 1;
 813         val = -value;
 814     }
 815     else
 816     {
 817         is_negative = 0;
 818         val = value;
 819     }
 820
 821     pos = buffer + 32;
 822     *pos = '\0';
 823
 824     do
 825     {
 826         digit = val % radix;
 827         val /= radix;
 828
 829         if (digit < 10)
 830             *--pos = '0' + digit;
 831         else
 832             *--pos = 'a' + digit - 10;
 833     }
 834     while (val != 0);
 835
 836     if (is_negative)
 837         *--pos = '-';
 838
 839     len = buffer + 33 - pos;
 840     if (len > size)
 841     {
 842         size_t i;
 843         MSVCRT_wchar_t *p = str;
 844
 845         /* Copy the temporary buffer backwards up to the available number of
 846          * characters. Don't copy the negative sign if present. */
 847
 848         if (is_negative)
 849         {
 850             p++;
 851             size--;
 852         }
 853
 854         for (pos = buffer + 31, i = 0; i < size; i++)
 855             *p++ = *pos--;
 856
 857         MSVCRT_INVALID_PMT("str[size] is too small");
 858         str[0] = '\0';
 859         *MSVCRT__errno() = MSVCRT_ERANGE;
 860         return MSVCRT_ERANGE;
 861     }
 862
 863     memcpy(str, pos, len * sizeof(MSVCRT_wchar_t));
 864     return 0;
 865 }
 866
 867 /*********************************************************************
 868  *  _itoa_s (MSVCRT.@)
 869  */
 870 int CDECL _itoa_s(int value, char *str, MSVCRT_size_t size, int radix)
 871 {
 872     return _ltoa_s(value, str, size, radix);
 873 }
 874
 875 /*********************************************************************
 876  *  _itow_s (MSVCRT.@)
 877  */
 878 int CDECL _itow_s(int value, MSVCRT_wchar_t *str, MSVCRT_size_t size, int radix)
 879 {
 880     return _ltow_s(value, str, size, radix);
 881 }
 882
 883 /*********************************************************************
 884  *  _ui64toa_s (MSVCRT.@)
 885  */
 886 int CDECL MSVCRT__ui64toa_s(unsigned __int64 value, char *str,
 887         MSVCRT_size_t size, int radix)
 888 {
 889     char buffer[65], *pos;
 890     int digit;
 891
 892     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 893         !MSVCRT_CHECK_PMT(radix>=2) || !MSVCRT_CHECK_PMT(radix<=36)) {
 894         *MSVCRT__errno() = MSVCRT_EINVAL;
 895         return MSVCRT_EINVAL;
 896     }
 897
 898     pos = buffer+64;
 899     *pos = '\0';
 900
 901     do {
 902         digit = value%radix;
 903         value /= radix;
 904
 905         if(digit < 10)
 906             *--pos = '0'+digit;
 907         else
 908             *--pos = 'a'+digit-10;
 909     }while(value != 0);
 910
 911     if(buffer-pos+65 > size) {
 912         MSVCRT_INVALID_PMT("str[size] is too small");
 913         *MSVCRT__errno() = MSVCRT_EINVAL;
 914         return MSVCRT_EINVAL;
 915     }
 916
 917     memcpy(str, pos, buffer-pos+65);
 918     return 0;
 919 }
 920
 921 /*********************************************************************
 922  *  _ultoa_s (MSVCRT.@)
 923  */
 924 int CDECL _ultoa_s(MSVCRT_ulong value, char *str, MSVCRT_size_t size, int radix)
 925 {
 926     MSVCRT_ulong digit;
 927     char buffer[33], *pos;
 928     size_t len;
 929
 930     if (!str || !size || radix < 2 || radix > 36)
 931     {
 932         if (str && size)
 933             str[0] = '\0';
 934
 935         *MSVCRT__errno() = MSVCRT_EINVAL;
 936         return MSVCRT_EINVAL;
 937     }
 938
 939     pos = buffer + 32;
 940     *pos = '\0';
 941
 942     do
 943     {
 944         digit = value % radix;
 945         value /= radix;
 946
 947         if (digit < 10)
 948             *--pos = '0' + digit;
 949         else
 950             *--pos = 'a' + digit - 10;
 951     }
 952     while (value != 0);
 953
 954     len = buffer + 33 - pos;
 955     if (len > size)
 956     {
 957         size_t i;
 958         char *p = str;
 959
 960         /* Copy the temporary buffer backwards up to the available number of
 961          * characters. */
 962
 963         for (pos = buffer + 31, i = 0; i < size; i++)
 964             *p++ = *pos--;
 965
 966         str[0] = '\0';
 967         *MSVCRT__errno() = MSVCRT_ERANGE;
 968         return MSVCRT_ERANGE;
 969     }
 970
 971     memcpy(str, pos, len);
 972     return 0;
 973 }
 974
 975 /*********************************************************************
 976  *  _i64toa_s (MSVCRT.@)
 977  */
 978 int CDECL _i64toa_s(__int64 value, char *str, MSVCRT_size_t size, int radix)
 979 {
 980     unsigned __int64 val;
 981     unsigned int digit;
 982     int is_negative;
 983     char buffer[65], *pos;
 984     size_t len;
 985
 986     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 987         !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
 988     {
 989         if (str && size)
 990             str[0] = '\0';
 991
 992         *MSVCRT__errno() = MSVCRT_EINVAL;
 993         return MSVCRT_EINVAL;
 994     }
 995
 996     if (value < 0 && radix == 10)
 997     {
 998         is_negative = 1;
 999         val = -value;
1000     }
1001     else
1002     {
1003         is_negative = 0;
1004         val = value;
1005     }
1006
1007     pos = buffer + 64;
1008     *pos = '\0';
1009
1010     do
1011     {
1012         digit = val % radix;
1013         val /= radix;
1014
1015         if (digit < 10)
1016             *--pos = '0' + digit;
1017         else
1018             *--pos = 'a' + digit - 10;
1019     }
1020     while (val != 0);
1021
1022     if (is_negative)
1023         *--pos = '-';
1024
1025     len = buffer + 65 - pos;
1026     if (len > size)
1027     {
1028         size_t i;
1029         char *p = str;
1030
1031         /* Copy the temporary buffer backwards up to the available number of
1032          * characters. Don't copy the negative sign if present. */
1033
1034         if (is_negative)
1035         {
1036             p++;
1037             size--;
1038         }
1039
1040         for (pos = buffer + 63, i = 0; i < size; i++)
1041             *p++ = *pos--;
1042
1043         str[0] = '\0';
1044         MSVCRT_INVALID_PMT("str[size] is too small");
1045         *MSVCRT__errno() = MSVCRT_ERANGE;
1046         return MSVCRT_ERANGE;
1047     }
1048
1049     memcpy(str, pos, len);
1050     return 0;
1051 }
1052
1053 /*********************************************************************
1054  *  _i64tow_s (MSVCRT.@)
1055  */
1056 int CDECL _i64tow_s(__int64 value, MSVCRT_wchar_t *str, MSVCRT_size_t size, int radix)
1057 {
1058     unsigned __int64 val;
1059     unsigned int digit;
1060     int is_negative;
1061     MSVCRT_wchar_t buffer[65], *pos;
1062     size_t len;
1063
1064     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
1065         !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
1066     {
1067         if (str && size)
1068             str[0] = '\0';
1069
1070         *MSVCRT__errno() = MSVCRT_EINVAL;
1071         return MSVCRT_EINVAL;
1072     }
1073
1074     if (value < 0 && radix == 10)
1075     {
1076         is_negative = 1;
1077         val = -value;
1078     }
1079     else
1080     {
1081         is_negative = 0;
1082         val = value;
1083     }
1084
1085     pos = buffer + 64;
1086     *pos = '\0';
1087
1088     do
1089     {
1090         digit = val % radix;
1091         val /= radix;
1092
1093         if (digit < 10)
1094             *--pos = '0' + digit;
1095         else
1096             *--pos = 'a' + digit - 10;
1097     }
1098     while (val != 0);
1099
1100     if (is_negative)
1101         *--pos = '-';
1102
1103     len = buffer + 65 - pos;
1104     if (len > size)
1105     {
1106         size_t i;
1107         MSVCRT_wchar_t *p = str;
1108
1109         /* Copy the temporary buffer backwards up to the available number of
1110          * characters. Don't copy the negative sign if present. */
1111
1112         if (is_negative)
1113         {
1114             p++;
1115             size--;
1116         }
1117
1118         for (pos = buffer + 63, i = 0; i < size; i++)
1119             *p++ = *pos--;
1120
1121         MSVCRT_INVALID_PMT("str[size] is too small");
1122         str[0] = '\0';
1123         *MSVCRT__errno() = MSVCRT_ERANGE;
1124         return MSVCRT_ERANGE;
1125     }
1126
1127     memcpy(str, pos, len * sizeof(MSVCRT_wchar_t));
1128     return 0;
1129 }
1130
1131 #define I10_OUTPUT_MAX_PREC 21
1132 /* Internal structure used by $I10_OUTPUT */
1133 struct _I10_OUTPUT_DATA {
1134     short pos;
1135     char sign;
1136     BYTE len;
1137     char str[I10_OUTPUT_MAX_PREC+1]; /* add space for '\0' */
1138 };
1139
1140 /*********************************************************************
1141  *              $I10_OUTPUT (MSVCRT.@)
1142  * ld - long double to be printed to data
1143  * prec - precision of part, we're interested in
1144  * flag - 0 for first prec digits, 1 for fractional part
1145  * data - data to be populated
1146  *
1147  * return value
1148  *      0 if given double is NaN or INF
1149  *      1 otherwise
1150  *
1151  * FIXME
1152  *      Native sets last byte of data->str to '0' or '9', I don't know what
1153  *      it means. Current implementation sets it always to '0'.
1154  */
1155 int CDECL MSVCRT_I10_OUTPUT(MSVCRT__LDOUBLE ld, int prec, int flag, struct _I10_OUTPUT_DATA *data)
1156 {
1157     static const char inf_str[] = "1#INF";
1158     static const char nan_str[] = "1#QNAN";
1159
1160     double d = ld.x;
1161     char format[8];
1162     char buf[I10_OUTPUT_MAX_PREC+9]; /* 9 = strlen("0.e+0000") + '\0' */
1163     char *p;
1164
1165     TRACE("(%lf %d %x %p)\n", d, prec, flag, data);
1166
1167     if(d<0) {
1168         data->sign = '-';
1169         d = -d;
1170     } else
1171         data->sign = ' ';
1172
1173     if(isinf(d)) {
1174         data->pos = 1;
1175         data->len = 5;
1176         memcpy(data->str, inf_str, sizeof(inf_str));
1177
1178         return 0;
1179     }
1180
1181     if(isnan(d)) {
1182         data->pos = 1;
1183         data->len = 6;
1184         memcpy(data->str, nan_str, sizeof(nan_str));
1185
1186         return 0;
1187     }
1188
1189     if(flag&1) {
1190         int exp = 1+floor(log10(d));
1191
1192         prec += exp;
1193         if(exp < 0)
1194             prec--;
1195     }
1196     prec--;
1197
1198     if(prec+1 > I10_OUTPUT_MAX_PREC)
1199         prec = I10_OUTPUT_MAX_PREC-1;
1200     else if(prec < 0) {
1201         d = 0.0;
1202         prec = 0;
1203     }
1204
1205     sprintf(format, "%%.%dle", prec);
1206     sprintf(buf, format, d);
1207
1208     buf[1] = buf[0];
1209     data->pos = atoi(buf+prec+3);
1210     if(buf[1] != '0')
1211         data->pos++;
1212
1213     for(p = buf+prec+1; p>buf+1 && *p=='0'; p--);
1214     data->len = p-buf;
1215
1216     memcpy(data->str, buf+1, data->len);
1217     data->str[data->len] = '\0';
1218
1219     if(buf[1]!='0' && prec-data->len+1>0)
1220         memcpy(data->str+data->len+1, buf+data->len+1, prec-data->len+1);
1221
1222     return 1;
1223 }
1224 #undef I10_OUTPUT_MAX_PREC