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  *              strxfrm (MSVCRT.@)
 397  */
 398 MSVCRT_size_t CDECL MSVCRT_strxfrm( char *dest, const char *src, MSVCRT_size_t len )
 399 {
 400     /* FIXME: handle Windows locale */
 401     return strxfrm( dest, src, len );
 402 }
 403
 404 /*********************************************************************
 405  *              _stricoll (MSVCRT.@)
 406  */
 407 int CDECL MSVCRT__stricoll( const char* str1, const char* str2 )
 408 {
 409   /* FIXME: handle collates */
 410   TRACE("str1 %s str2 %s\n", debugstr_a(str1), debugstr_a(str2));
 411   return lstrcmpiA( str1, str2 );
 412 }
 413
 414 /********************************************************************
 415  *              _atoldbl (MSVCRT.@)
 416  */
 417 int CDECL MSVCRT__atoldbl(MSVCRT__LDOUBLE *value, const char *str)
 418 {
 419   /* FIXME needs error checking for huge/small values */
 420 #ifdef HAVE_STRTOLD
 421   TRACE("str %s value %p\n",str,value);
 422   value->x = strtold(str,0);
 423 #else
 424   FIXME("stub, str %s value %p\n",str,value);
 425 #endif
 426   return 0;
 427 }
 428
 429 /********************************************************************
 430  *              __STRINGTOLD (MSVCRT.@)
 431  */
 432 int CDECL __STRINGTOLD( MSVCRT__LDOUBLE *value, char **endptr, const char *str, int flags )
 433 {
 434 #ifdef HAVE_STRTOLD
 435     FIXME("%p %p %s %x partial stub\n", value, endptr, str, flags );
 436     value->x = strtold(str,endptr);
 437 #else
 438     FIXME("%p %p %s %x stub\n", value, endptr, str, flags );
 439 #endif
 440     return 0;
 441 }
 442
 443 /******************************************************************
 444  *              strtol (MSVCRT.@)
 445  */
 446 MSVCRT_long CDECL MSVCRT_strtol(const char* nptr, char** end, int base)
 447 {
 448     /* wrapper to forward libc error code to msvcrt's error codes */
 449     long ret;
 450
 451     errno = 0;
 452     ret = strtol(nptr, end, base);
 453     switch (errno)
 454     {
 455     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 456     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 457     default:
 458         /* cope with the fact that we may use 64bit long integers on libc
 459          * while msvcrt always uses 32bit long integers
 460          */
 461         if (ret > MSVCRT_LONG_MAX)
 462         {
 463             ret = MSVCRT_LONG_MAX;
 464             *MSVCRT__errno() = MSVCRT_ERANGE;
 465         }
 466         else if (ret < -MSVCRT_LONG_MAX - 1)
 467         {
 468             ret = -MSVCRT_LONG_MAX - 1;
 469             *MSVCRT__errno() = MSVCRT_ERANGE;
 470         }
 471         break;
 472     }
 473
 474     return ret;
 475 }
 476
 477 /******************************************************************
 478  *              strtoul (MSVCRT.@)
 479  */
 480 MSVCRT_ulong CDECL MSVCRT_strtoul(const char* nptr, char** end, int base)
 481 {
 482     /* wrapper to forward libc error code to msvcrt's error codes */
 483     unsigned long ret;
 484
 485     errno = 0;
 486     ret = strtoul(nptr, end, base);
 487     switch (errno)
 488     {
 489     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 490     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 491     default:
 492         /* cope with the fact that we may use 64bit long integers on libc
 493          * while msvcrt always uses 32bit long integers
 494          */
 495         if (ret > MSVCRT_ULONG_MAX)
 496         {
 497             ret = MSVCRT_ULONG_MAX;
 498             *MSVCRT__errno() = MSVCRT_ERANGE;
 499         }
 500         break;
 501     }
 502
 503     return ret;
 504 }
 505
 506 /******************************************************************
 507  *              strnlen (MSVCRT.@)
 508  */
 509 MSVCRT_size_t CDECL MSVCRT_strnlen(const char *s, MSVCRT_size_t maxlen)
 510 {
 511     MSVCRT_size_t i;
 512
 513     for(i=0; i<maxlen; i++)
 514         if(!s[i]) break;
 515
 516     return i;
 517 }
 518
 519 /*********************************************************************
 520  *  _strtoi64_l (MSVCRT.@)
 521  *
 522  * FIXME: locale parameter is ignored
 523  */
 524 __int64 CDECL MSVCRT_strtoi64_l(const char *nptr, char **endptr, int base, MSVCRT__locale_t locale)
 525 {
 526     BOOL negative = FALSE;
 527     __int64 ret = 0;
 528
 529     TRACE("(%s %p %d %p)\n", nptr, endptr, base, locale);
 530
 531     if (!MSVCRT_CHECK_PMT(nptr != NULL) || !MSVCRT_CHECK_PMT(base == 0 || base >= 2) ||
 532         !MSVCRT_CHECK_PMT(base <= 36)) {
 533         return 0;
 534     }
 535
 536     while(isspace(*nptr)) nptr++;
 537
 538     if(*nptr == '-') {
 539         negative = TRUE;
 540         nptr++;
 541     } else if(*nptr == '+')
 542         nptr++;
 543
 544     if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
 545         base = 16;
 546         nptr += 2;
 547     }
 548
 549     if(base == 0) {
 550         if(*nptr=='0')
 551             base = 8;
 552         else
 553             base = 10;
 554     }
 555
 556     while(*nptr) {
 557         char cur = tolower(*nptr);
 558         int v;
 559
 560         if(isdigit(cur)) {
 561             if(cur >= '0'+base)
 562                 break;
 563             v = cur-'0';
 564         } else {
 565             if(cur<'a' || cur>='a'+base-10)
 566                 break;
 567             v = cur-'a'+10;
 568         }
 569
 570         if(negative)
 571             v = -v;
 572
 573         nptr++;
 574
 575         if(!negative && (ret>MSVCRT_I64_MAX/base || ret*base>MSVCRT_I64_MAX-v)) {
 576             ret = MSVCRT_I64_MAX;
 577             *MSVCRT__errno() = MSVCRT_ERANGE;
 578         } else if(negative && (ret<MSVCRT_I64_MIN/base || ret*base<MSVCRT_I64_MIN-v)) {
 579             ret = MSVCRT_I64_MIN;
 580             *MSVCRT__errno() = MSVCRT_ERANGE;
 581         } else
 582             ret = ret*base + v;
 583     }
 584
 585     if(endptr)
 586         *endptr = (char*)nptr;
 587
 588     return ret;
 589 }
 590
 591 /*********************************************************************
 592  *  _strtoi64 (MSVCRT.@)
 593  */
 594 __int64 CDECL MSVCRT_strtoi64(const char *nptr, char **endptr, int base)
 595 {
 596     return MSVCRT_strtoi64_l(nptr, endptr, base, NULL);
 597 }
 598
 599 /*********************************************************************
 600  *  _strtoui64_l (MSVCRT.@)
 601  *
 602  * FIXME: locale parameter is ignored
 603  */
 604 unsigned __int64 CDECL MSVCRT_strtoui64_l(const char *nptr, char **endptr, int base, MSVCRT__locale_t locale)
 605 {
 606     BOOL negative = FALSE;
 607     unsigned __int64 ret = 0;
 608
 609     TRACE("(%s %p %d %p)\n", nptr, endptr, base, locale);
 610
 611     if (!MSVCRT_CHECK_PMT(nptr != NULL) || !MSVCRT_CHECK_PMT(base == 0 || base >= 2) ||
 612         !MSVCRT_CHECK_PMT(base <= 36)) {
 613         return 0;
 614     }
 615
 616     while(isspace(*nptr)) nptr++;
 617
 618     if(*nptr == '-') {
 619         negative = TRUE;
 620         nptr++;
 621     } else if(*nptr == '+')
 622         nptr++;
 623
 624     if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
 625         base = 16;
 626         nptr += 2;
 627     }
 628
 629     if(base == 0) {
 630         if(*nptr=='0')
 631             base = 8;
 632         else
 633             base = 10;
 634     }
 635
 636     while(*nptr) {
 637         char cur = tolower(*nptr);
 638         int v;
 639
 640         if(isdigit(cur)) {
 641             if(cur >= '0'+base)
 642                 break;
 643             v = *nptr-'0';
 644         } else {
 645             if(cur<'a' || cur>='a'+base-10)
 646                 break;
 647             v = cur-'a'+10;
 648         }
 649
 650         nptr++;
 651
 652         if(ret>MSVCRT_UI64_MAX/base || ret*base>MSVCRT_UI64_MAX-v) {
 653             ret = MSVCRT_UI64_MAX;
 654             *MSVCRT__errno() = MSVCRT_ERANGE;
 655         } else
 656             ret = ret*base + v;
 657     }
 658
 659     if(endptr)
 660         *endptr = (char*)nptr;
 661
 662     return negative ? -ret : ret;
 663 }
 664
 665 /*********************************************************************
 666  *  _strtoui64 (MSVCRT.@)
 667  */
 668 unsigned __int64 CDECL MSVCRT_strtoui64(const char *nptr, char **endptr, int base)
 669 {
 670     return MSVCRT_strtoui64_l(nptr, endptr, base, NULL);
 671 }
 672
 673 /*********************************************************************
 674  *  _itoa_s (MSVCRT.@)
 675  */
 676 int CDECL _itoa_s(int value, char *str, MSVCRT_size_t size, int radix)
 677 {
 678     unsigned int val, digit;
 679     int is_negative;
 680     char buffer[33], *pos;
 681     size_t len;
 682
 683     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 684         !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
 685     {
 686         if (str && size)
 687             str[0] = '\0';
 688
 689         *MSVCRT__errno() = MSVCRT_EINVAL;
 690         return MSVCRT_EINVAL;
 691     }
 692
 693     if (value < 0 && radix == 10)
 694     {
 695         is_negative = 1;
 696         val = -value;
 697     }
 698     else
 699     {
 700         is_negative = 0;
 701         val = value;
 702     }
 703
 704     pos = buffer + 32;
 705     *pos = '\0';
 706
 707     do
 708     {
 709         digit = val % radix;
 710         val /= radix;
 711
 712         if (digit < 10)
 713             *--pos = '0' + digit;
 714         else
 715             *--pos = 'a' + digit - 10;
 716     }
 717     while (val != 0);
 718
 719     if (is_negative)
 720         *--pos = '-';
 721
 722     len = buffer + 33 - pos;
 723     if (len > size)
 724     {
 725         size_t i;
 726         char *p = str;
 727
 728         /* Copy the temporary buffer backwards up to the available number of
 729          * characters. Don't copy the negative sign if present. */
 730
 731         if (is_negative)
 732         {
 733             p++;
 734             size--;
 735         }
 736
 737         for (pos = buffer + 31, i = 0; i < size; i++)
 738             *p++ = *pos--;
 739
 740         str[0] = '\0';
 741         MSVCRT_INVALID_PMT("str[size] is too small");
 742         *MSVCRT__errno() = MSVCRT_ERANGE;
 743         return MSVCRT_ERANGE;
 744     }
 745
 746     memcpy(str, pos, len);
 747     return 0;
 748 }
 749
 750 /*********************************************************************
 751  *  _itow_s (MSVCRT.@)
 752  */
 753 int CDECL _itow_s(int value, MSVCRT_wchar_t *str, MSVCRT_size_t size, int radix)
 754 {
 755     unsigned int val, digit;
 756     int is_negative;
 757     MSVCRT_wchar_t buffer[33], *pos;
 758     size_t len;
 759
 760     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 761         !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
 762     {
 763         if (str && size)
 764             str[0] = '\0';
 765
 766         *MSVCRT__errno() = MSVCRT_EINVAL;
 767         return MSVCRT_EINVAL;
 768     }
 769
 770     if (value < 0 && radix == 10)
 771     {
 772         is_negative = 1;
 773         val = -value;
 774     }
 775     else
 776     {
 777         is_negative = 0;
 778         val = value;
 779     }
 780
 781     pos = buffer + 32;
 782     *pos = '\0';
 783
 784     do
 785     {
 786         digit = val % radix;
 787         val /= radix;
 788
 789         if (digit < 10)
 790             *--pos = '0' + digit;
 791         else
 792             *--pos = 'a' + digit - 10;
 793     }
 794     while (val != 0);
 795
 796     if (is_negative)
 797         *--pos = '-';
 798
 799     len = buffer + 33 - pos;
 800     if (len > size)
 801     {
 802         size_t i;
 803         MSVCRT_wchar_t *p = str;
 804
 805         /* Copy the temporary buffer backwards up to the available number of
 806          * characters. Don't copy the negative sign if present. */
 807
 808         if (is_negative)
 809         {
 810             p++;
 811             size--;
 812         }
 813
 814         for (pos = buffer + 31, i = 0; i < size; i++)
 815             *p++ = *pos--;
 816
 817         MSVCRT_INVALID_PMT("str[size] is too small");
 818         str[0] = '\0';
 819         *MSVCRT__errno() = MSVCRT_ERANGE;
 820         return MSVCRT_ERANGE;
 821     }
 822
 823     memcpy(str, pos, len * sizeof(MSVCRT_wchar_t));
 824     return 0;
 825 }
 826
 827 /*********************************************************************
 828  *  _ui64toa_s (MSVCRT.@)
 829  */
 830 int CDECL MSVCRT__ui64toa_s(unsigned __int64 value, char *str,
 831         MSVCRT_size_t size, int radix)
 832 {
 833     char buffer[65], *pos;
 834     int digit;
 835
 836     if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
 837         !MSVCRT_CHECK_PMT(radix>=2) || !MSVCRT_CHECK_PMT(radix<=36)) {
 838         *MSVCRT__errno() = MSVCRT_EINVAL;
 839         return MSVCRT_EINVAL;
 840     }
 841
 842     pos = buffer+64;
 843     *pos = '\0';
 844
 845     do {
 846         digit = value%radix;
 847         value /= radix;
 848
 849         if(digit < 10)
 850             *--pos = '0'+digit;
 851         else
 852             *--pos = 'a'+digit-10;
 853     }while(value != 0);
 854
 855     if(buffer-pos+65 > size) {
 856         MSVCRT_INVALID_PMT("str[size] is too small");
 857         *MSVCRT__errno() = MSVCRT_EINVAL;
 858         return MSVCRT_EINVAL;
 859     }
 860
 861     memcpy(str, pos, buffer-pos+65);
 862     return 0;
 863 }
 864
 865 /*********************************************************************
 866  *  _ultoa_s (MSVCRT.@)
 867  */
 868 int CDECL _ultoa_s(MSVCRT_ulong value, char *str, MSVCRT_size_t size, int radix)
 869 {
 870     MSVCRT_ulong digit;
 871     char buffer[33], *pos;
 872     size_t len;
 873
 874     if (!str || !size || radix < 2 || radix > 36)
 875     {
 876         if (str && size)
 877             str[0] = '\0';
 878
 879         *MSVCRT__errno() = MSVCRT_EINVAL;
 880         return MSVCRT_EINVAL;
 881     }
 882
 883     pos = buffer + 32;
 884     *pos = '\0';
 885
 886     do
 887     {
 888         digit = value % radix;
 889         value /= radix;
 890
 891         if (digit < 10)
 892             *--pos = '0' + digit;
 893         else
 894             *--pos = 'a' + digit - 10;
 895     }
 896     while (value != 0);
 897
 898     len = buffer + 33 - pos;
 899     if (len > size)
 900     {
 901         size_t i;
 902         char *p = str;
 903
 904         /* Copy the temporary buffer backwards up to the available number of
 905          * characters. */
 906
 907         for (pos = buffer + 31, i = 0; i < size; i++)
 908             *p++ = *pos--;
 909
 910         str[0] = '\0';
 911         *MSVCRT__errno() = MSVCRT_ERANGE;
 912         return MSVCRT_ERANGE;
 913     }
 914
 915     memcpy(str, pos, len);
 916     return 0;
 917 }
 918
 919 #define I10_OUTPUT_MAX_PREC 21
 920 /* Internal structure used by $I10_OUTPUT */
 921 struct _I10_OUTPUT_DATA {
 922     short pos;
 923     char sign;
 924     BYTE len;
 925     char str[I10_OUTPUT_MAX_PREC+1]; /* add space for '\0' */
 926 };
 927
 928 /*********************************************************************
 929  *              $I10_OUTPUT (MSVCRT.@)
 930  * ld - long double to be printed to data
 931  * prec - precision of part, we're interested in
 932  * flag - 0 for first prec digits, 1 for fractional part
 933  * data - data to be populated
 934  *
 935  * return value
 936  *      0 if given double is NaN or INF
 937  *      1 otherwise
 938  *
 939  * FIXME
 940  *      Native sets last byte of data->str to '0' or '9', I don't know what
 941  *      it means. Current implementation sets it always to '0'.
 942  */
 943 int CDECL MSVCRT_I10_OUTPUT(MSVCRT__LDOUBLE ld, int prec, int flag, struct _I10_OUTPUT_DATA *data)
 944 {
 945     static const char inf_str[] = "1#INF";
 946     static const char nan_str[] = "1#QNAN";
 947
 948     double d = ld.x;
 949     char format[8];
 950     char buf[I10_OUTPUT_MAX_PREC+9]; /* 9 = strlen("0.e+0000") + '\0' */
 951     char *p;
 952
 953     TRACE("(%lf %d %x %p)\n", d, prec, flag, data);
 954
 955     if(d<0) {
 956         data->sign = '-';
 957         d = -d;
 958     } else
 959         data->sign = ' ';
 960
 961     if(isinf(d)) {
 962         data->pos = 1;
 963         data->len = 5;
 964         memcpy(data->str, inf_str, sizeof(inf_str));
 965
 966         return 0;
 967     }
 968
 969     if(isnan(d)) {
 970         data->pos = 1;
 971         data->len = 6;
 972         memcpy(data->str, nan_str, sizeof(nan_str));
 973
 974         return 0;
 975     }
 976
 977     if(flag&1) {
 978         int exp = 1+floor(log10(d));
 979
 980         prec += exp;
 981         if(exp < 0)
 982             prec--;
 983     }
 984     prec--;
 985
 986     if(prec+1 > I10_OUTPUT_MAX_PREC)
 987         prec = I10_OUTPUT_MAX_PREC-1;
 988     else if(prec < 0) {
 989         d = 0.0;
 990         prec = 0;
 991     }
 992
 993     sprintf(format, "%%.%dle", prec);
 994     sprintf(buf, format, d);
 995
 996     buf[1] = buf[0];
 997     data->pos = atoi(buf+prec+3);
 998     if(buf[1] != '0')
 999         data->pos++;
1000
1001     for(p = buf+prec+1; p>buf+1 && *p=='0'; p--);
1002     data->len = p-buf;
1003
1004     memcpy(data->str, buf+1, data->len);
1005     data->str[data->len] = '\0';
1006
1007     if(buf[1]!='0' && prec-data->len+1>0)
1008         memcpy(data->str+data->len+1, buf+data->len+1, prec-data->len+1);
1009
1010     return 1;
1011 }
1012 #undef I10_OUTPUT_MAX_PREC