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  *              _strnset (MSVCRT.@)
  55  */
  56 char* CDECL MSVCRT__strnset(char* str, int value, MSVCRT_size_t len)
  57 {
  58   if (len > 0 && str)
  59     while (*str && len--)
  60       *str++ = value;
  61   return str;
  62 }
  63
  64 /*********************************************************************
  65  *              _strrev (MSVCRT.@)
  66  */
  67 char* CDECL _strrev(char* str)
  68 {
  69   char * p1;
  70   char * p2;
  71
  72   if (str && *str)
  73     for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2)
  74     {
  75       *p1 ^= *p2;
  76       *p2 ^= *p1;
  77       *p1 ^= *p2;
  78     }
  79
  80   return str;
  81 }
  82
  83 /*********************************************************************
  84  *              _strset (MSVCRT.@)
  85  */
  86 char* CDECL _strset(char* str, int value)
  87 {
  88   char *ptr = str;
  89   while (*ptr)
  90     *ptr++ = value;
  91
  92   return str;
  93 }
  94
  95 /*********************************************************************
  96  *              strtok  (MSVCRT.@)
  97  */
  98 char * CDECL MSVCRT_strtok( char *str, const char *delim )
  99 {
 100     thread_data_t *data = msvcrt_get_thread_data();
 101     char *ret;
 102
 103     if (!str)
 104         if (!(str = data->strtok_next)) return NULL;
 105
 106     while (*str && strchr( delim, *str )) str++;
 107     if (!*str) return NULL;
 108     ret = str++;
 109     while (*str && !strchr( delim, *str )) str++;
 110     if (*str) *str++ = 0;
 111     data->strtok_next = str;
 112     return ret;
 113 }
 114
 115 /*********************************************************************
 116  *              strtok_s  (MSVCRT.@)
 117  */
 118 char * CDECL MSVCRT_strtok_s(char *str, const char *delim, char **ctx)
 119 {
 120     if(!delim || !ctx || (!str && !*ctx)) {
 121         MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
 122         *MSVCRT__errno() = MSVCRT_EINVAL;
 123         return NULL;
 124     }
 125
 126     if(!str)
 127         str = *ctx;
 128
 129     while(*str && strchr(delim, *str))
 130         str++;
 131     if(!*str)
 132         return NULL;
 133
 134     *ctx = str+1;
 135     while(**ctx && !strchr(delim, **ctx))
 136         (*ctx)++;
 137     if(**ctx)
 138         *(*ctx)++ = 0;
 139
 140     return str;
 141 }
 142
 143 /*********************************************************************
 144  *              _swab (MSVCRT.@)
 145  */
 146 void CDECL MSVCRT__swab(char* src, char* dst, int len)
 147 {
 148   if (len > 1)
 149   {
 150     len = (unsigned)len >> 1;
 151
 152     while (len--) {
 153       char s0 = src[0];
 154       char s1 = src[1];
 155       *dst++ = s1;
 156       *dst++ = s0;
 157       src = src + 2;
 158     }
 159   }
 160 }
 161
 162 /*********************************************************************
 163  *              strtod_l  (MSVCRT.@)
 164  */
 165 double CDECL MSVCRT_strtod_l( const char *str, char **end, MSVCRT__locale_t locale)
 166 {
 167     unsigned __int64 d=0, hlp;
 168     unsigned fpcontrol;
 169     int exp=0, sign=1;
 170     const char *p;
 171     double ret;
 172     BOOL found_digit = FALSE;
 173
 174     if(!str) {
 175         MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
 176         *MSVCRT__errno() = MSVCRT_EINVAL;
 177         return 0;
 178     }
 179
 180     if(!locale)
 181         locale = get_locale();
 182
 183     /* FIXME: use *_l functions */
 184     p = str;
 185     while(isspace(*p))
 186         p++;
 187
 188     if(*p == '-') {
 189         sign = -1;
 190         p++;
 191     } else  if(*p == '+')
 192         p++;
 193
 194     while(isdigit(*p)) {
 195         found_digit = TRUE;
 196         hlp = d*10+*(p++)-'0';
 197         if(d>MSVCRT_UI64_MAX/10 || hlp<d) {
 198             exp++;
 199             break;
 200         } else
 201             d = hlp;
 202     }
 203     while(isdigit(*p)) {
 204         exp++;
 205         p++;
 206     }
 207
 208     if(*p == *locale->locinfo->lconv->decimal_point)
 209         p++;
 210
 211     while(isdigit(*p)) {
 212         found_digit = TRUE;
 213         hlp = d*10+*(p++)-'0';
 214         if(d>MSVCRT_UI64_MAX/10 || hlp<d)
 215             break;
 216
 217         d = hlp;
 218         exp--;
 219     }
 220     while(isdigit(*p))
 221         p++;
 222
 223     if(!found_digit) {
 224         if(end)
 225             *end = (char*)str;
 226         return 0.0;
 227     }
 228
 229     if(*p=='e' || *p=='E' || *p=='d' || *p=='D') {
 230         int e=0, s=1;
 231
 232         p++;
 233         if(*p == '-') {
 234             s = -1;
 235             p++;
 236         } else if(*p == '+')
 237             p++;
 238
 239         if(isdigit(*p)) {
 240             while(isdigit(*p)) {
 241                 if(e>INT_MAX/10 || (e=e*10+*p-'0')<0)
 242                     e = INT_MAX;
 243                 p++;
 244             }
 245             e *= s;
 246
 247             if(exp<0 && e<0 && exp+e>=0) exp = INT_MIN;
 248             else if(exp>0 && e>0 && exp+e<0) exp = INT_MAX;
 249             else exp += e;
 250         } else {
 251             if(*p=='-' || *p=='+')
 252                 p--;
 253             p--;
 254         }
 255     }
 256
 257     fpcontrol = _control87(0, 0);
 258     _control87(MSVCRT__EM_DENORMAL|MSVCRT__EM_INVALID|MSVCRT__EM_ZERODIVIDE
 259             |MSVCRT__EM_OVERFLOW|MSVCRT__EM_UNDERFLOW|MSVCRT__EM_INEXACT, 0xffffffff);
 260
 261     if(exp>0)
 262         ret = (double)sign*d*pow(10, exp);
 263     else
 264         ret = (double)sign*d/pow(10, -exp);
 265
 266     _control87(fpcontrol, 0xffffffff);
 267
 268     if((d && ret==0.0) || isinf(ret))
 269         *MSVCRT__errno() = MSVCRT_ERANGE;
 270
 271     if(end)
 272         *end = (char*)p;
 273
 274     return ret;
 275 }
 276
 277 /*********************************************************************
 278  *              strtod  (MSVCRT.@)
 279  */
 280 double CDECL MSVCRT_strtod( const char *str, char **end )
 281 {
 282     return MSVCRT_strtod_l( str, end, NULL );
 283 }
 284
 285 /*********************************************************************
 286  *              atof  (MSVCRT.@)
 287  */
 288 double CDECL MSVCRT_atof( const char *str )
 289 {
 290     return MSVCRT_strtod_l(str, NULL, NULL);
 291 }
 292
 293 /*********************************************************************
 294  *              _atof_l  (MSVCRT.@)
 295  */
 296 double CDECL MSVCRT__atof_l( const char *str, MSVCRT__locale_t locale)
 297 {
 298     return MSVCRT_strtod_l(str, NULL, locale);
 299 }
 300
 301 /*********************************************************************
 302  *              strcoll (MSVCRT.@)
 303  */
 304 int CDECL MSVCRT_strcoll( const char* str1, const char* str2 )
 305 {
 306     /* FIXME: handle Windows locale */
 307     return strcoll( str1, str2 );
 308 }
 309
 310 /*********************************************************************
 311  *      strcpy_s (MSVCRT.@)
 312  */
 313 int CDECL MSVCRT_strcpy_s( char* dst, MSVCRT_size_t elem, const char* src )
 314 {
 315     MSVCRT_size_t i;
 316     if(!elem) return MSVCRT_EINVAL;
 317     if(!dst) return MSVCRT_EINVAL;
 318     if(!src)
 319     {
 320         dst[0] = '\0';
 321         return MSVCRT_EINVAL;
 322     }
 323
 324     for(i = 0; i < elem; i++)
 325     {
 326         if((dst[i] = src[i]) == '\0') return 0;
 327     }
 328     dst[0] = '\0';
 329     return MSVCRT_ERANGE;
 330 }
 331
 332 /*********************************************************************
 333  *      strcat_s (MSVCRT.@)
 334  */
 335 int CDECL MSVCRT_strcat_s( char* dst, MSVCRT_size_t elem, const char* src )
 336 {
 337     MSVCRT_size_t i, j;
 338     if(!dst) return MSVCRT_EINVAL;
 339     if(elem == 0) return MSVCRT_EINVAL;
 340     if(!src)
 341     {
 342         dst[0] = '\0';
 343         return MSVCRT_EINVAL;
 344     }
 345
 346     for(i = 0; i < elem; i++)
 347     {
 348         if(dst[i] == '\0')
 349         {
 350             for(j = 0; (j + i) < elem; j++)
 351             {
 352                 if((dst[j + i] = src[j]) == '\0') return 0;
 353             }
 354         }
 355     }
 356     /* Set the first element to 0, not the first element after the skipped part */
 357     dst[0] = '\0';
 358     return MSVCRT_ERANGE;
 359 }
 360
 361 /*********************************************************************
 362  *              strxfrm (MSVCRT.@)
 363  */
 364 MSVCRT_size_t CDECL MSVCRT_strxfrm( char *dest, const char *src, MSVCRT_size_t len )
 365 {
 366     /* FIXME: handle Windows locale */
 367     return strxfrm( dest, src, len );
 368 }
 369
 370 /*********************************************************************
 371  *              _stricoll (MSVCRT.@)
 372  */
 373 int CDECL MSVCRT__stricoll( const char* str1, const char* str2 )
 374 {
 375   /* FIXME: handle collates */
 376   TRACE("str1 %s str2 %s\n", debugstr_a(str1), debugstr_a(str2));
 377   return lstrcmpiA( str1, str2 );
 378 }
 379
 380 /********************************************************************
 381  *              _atoldbl (MSVCRT.@)
 382  */
 383 int CDECL MSVCRT__atoldbl(MSVCRT__LDOUBLE *value, const char *str)
 384 {
 385   /* FIXME needs error checking for huge/small values */
 386 #ifdef HAVE_STRTOLD
 387   TRACE("str %s value %p\n",str,value);
 388   value->x = strtold(str,0);
 389 #else
 390   FIXME("stub, str %s value %p\n",str,value);
 391 #endif
 392   return 0;
 393 }
 394
 395 /********************************************************************
 396  *              __STRINGTOLD (MSVCRT.@)
 397  */
 398 int CDECL __STRINGTOLD( MSVCRT__LDOUBLE *value, char **endptr, const char *str, int flags )
 399 {
 400 #ifdef HAVE_STRTOLD
 401     FIXME("%p %p %s %x partial stub\n", value, endptr, str, flags );
 402     value->x = strtold(str,endptr);
 403 #else
 404     FIXME("%p %p %s %x stub\n", value, endptr, str, flags );
 405 #endif
 406     return 0;
 407 }
 408
 409 /******************************************************************
 410  *              strtol (MSVCRT.@)
 411  */
 412 MSVCRT_long CDECL MSVCRT_strtol(const char* nptr, char** end, int base)
 413 {
 414     /* wrapper to forward libc error code to msvcrt's error codes */
 415     long ret;
 416
 417     errno = 0;
 418     ret = strtol(nptr, end, base);
 419     switch (errno)
 420     {
 421     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 422     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 423     default:
 424         /* cope with the fact that we may use 64bit long integers on libc
 425          * while msvcrt always uses 32bit long integers
 426          */
 427         if (ret > MSVCRT_LONG_MAX)
 428         {
 429             ret = MSVCRT_LONG_MAX;
 430             *MSVCRT__errno() = MSVCRT_ERANGE;
 431         }
 432         else if (ret < -MSVCRT_LONG_MAX - 1)
 433         {
 434             ret = -MSVCRT_LONG_MAX - 1;
 435             *MSVCRT__errno() = MSVCRT_ERANGE;
 436         }
 437         break;
 438     }
 439
 440     return ret;
 441 }
 442
 443 /******************************************************************
 444  *              strtoul (MSVCRT.@)
 445  */
 446 MSVCRT_ulong CDECL MSVCRT_strtoul(const char* nptr, char** end, int base)
 447 {
 448     /* wrapper to forward libc error code to msvcrt's error codes */
 449     unsigned long ret;
 450
 451     errno = 0;
 452     ret = strtoul(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_ULONG_MAX)
 462         {
 463             ret = MSVCRT_ULONG_MAX;
 464             *MSVCRT__errno() = MSVCRT_ERANGE;
 465         }
 466         break;
 467     }
 468
 469     return ret;
 470 }
 471
 472 /******************************************************************
 473  *              strnlen (MSVCRT.@)
 474  */
 475 MSVCRT_size_t CDECL MSVCRT_strnlen(const char *s, MSVCRT_size_t maxlen)
 476 {
 477     MSVCRT_size_t i;
 478
 479     for(i=0; i<maxlen; i++)
 480         if(!s[i]) break;
 481
 482     return i;
 483 }
 484
 485 /*********************************************************************
 486  *  _strtoi64_l (MSVCRT.@)
 487  *
 488  * FIXME: locale parameter is ignored
 489  */
 490 __int64 CDECL MSVCRT_strtoi64_l(const char *nptr, char **endptr, int base, MSVCRT__locale_t locale)
 491 {
 492     BOOL negative = FALSE;
 493     __int64 ret = 0;
 494
 495     TRACE("(%s %p %d %p)\n", nptr, endptr, base, locale);
 496
 497     if(!nptr || base<0 || base>36 || base==1) {
 498         MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
 499         return 0;
 500     }
 501
 502     while(isspace(*nptr)) nptr++;
 503
 504     if(*nptr == '-') {
 505         negative = TRUE;
 506         nptr++;
 507     } else if(*nptr == '+')
 508         nptr++;
 509
 510     if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
 511         base = 16;
 512         nptr += 2;
 513     }
 514
 515     if(base == 0) {
 516         if(*nptr=='0')
 517             base = 8;
 518         else
 519             base = 10;
 520     }
 521
 522     while(*nptr) {
 523         char cur = tolower(*nptr);
 524         int v;
 525
 526         if(isdigit(cur)) {
 527             if(cur >= '0'+base)
 528                 break;
 529             v = cur-'0';
 530         } else {
 531             if(cur<'a' || cur>='a'+base-10)
 532                 break;
 533             v = cur-'a'+10;
 534         }
 535
 536         if(negative)
 537             v = -v;
 538
 539         nptr++;
 540
 541         if(!negative && (ret>MSVCRT_I64_MAX/base || ret*base>MSVCRT_I64_MAX-v)) {
 542             ret = MSVCRT_I64_MAX;
 543             *MSVCRT__errno() = MSVCRT_ERANGE;
 544         } else if(negative && (ret<MSVCRT_I64_MIN/base || ret*base<MSVCRT_I64_MIN-v)) {
 545             ret = MSVCRT_I64_MIN;
 546             *MSVCRT__errno() = MSVCRT_ERANGE;
 547         } else
 548             ret = ret*base + v;
 549     }
 550
 551     if(endptr)
 552         *endptr = (char*)nptr;
 553
 554     return ret;
 555 }
 556
 557 /*********************************************************************
 558  *  _strtoi64 (MSVCRT.@)
 559  */
 560 __int64 CDECL MSVCRT_strtoi64(const char *nptr, char **endptr, int base)
 561 {
 562     return MSVCRT_strtoi64_l(nptr, endptr, base, NULL);
 563 }
 564
 565 /*********************************************************************
 566  *  _strtoui64_l (MSVCRT.@)
 567  *
 568  * FIXME: locale parameter is ignored
 569  */
 570 unsigned __int64 CDECL MSVCRT_strtoui64_l(const char *nptr, char **endptr, int base, MSVCRT__locale_t locale)
 571 {
 572     BOOL negative = FALSE;
 573     unsigned __int64 ret = 0;
 574
 575     TRACE("(%s %p %d %p)\n", nptr, endptr, base, locale);
 576
 577     if(!nptr || base<0 || base>36 || base==1) {
 578         MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
 579         return 0;
 580     }
 581
 582     while(isspace(*nptr)) nptr++;
 583
 584     if(*nptr == '-') {
 585         negative = TRUE;
 586         nptr++;
 587     } else if(*nptr == '+')
 588         nptr++;
 589
 590     if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
 591         base = 16;
 592         nptr += 2;
 593     }
 594
 595     if(base == 0) {
 596         if(*nptr=='0')
 597             base = 8;
 598         else
 599             base = 10;
 600     }
 601
 602     while(*nptr) {
 603         char cur = tolower(*nptr);
 604         int v;
 605
 606         if(isdigit(cur)) {
 607             if(cur >= '0'+base)
 608                 break;
 609             v = *nptr-'0';
 610         } else {
 611             if(cur<'a' || cur>='a'+base-10)
 612                 break;
 613             v = cur-'a'+10;
 614         }
 615
 616         nptr++;
 617
 618         if(ret>MSVCRT_UI64_MAX/base || ret*base>MSVCRT_UI64_MAX-v) {
 619             ret = MSVCRT_UI64_MAX;
 620             *MSVCRT__errno() = MSVCRT_ERANGE;
 621         } else
 622             ret = ret*base + v;
 623     }
 624
 625     if(endptr)
 626         *endptr = (char*)nptr;
 627
 628     return negative ? -ret : ret;
 629 }
 630
 631 /*********************************************************************
 632  *  _strtoui64 (MSVCRT.@)
 633  */
 634 unsigned __int64 CDECL MSVCRT_strtoui64(const char *nptr, char **endptr, int base)
 635 {
 636     return MSVCRT_strtoui64_l(nptr, endptr, base, NULL);
 637 }
 638
 639 /*********************************************************************
 640  *  _ui64toa_s (MSVCRT.@)
 641  */
 642 int CDECL MSVCRT__ui64toa_s(unsigned __int64 value, char *str,
 643         MSVCRT_size_t size, int radix)
 644 {
 645     char buffer[65], *pos;
 646     int digit;
 647
 648     if(!str || radix<2 || radix>36) {
 649         MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
 650         *MSVCRT__errno() = MSVCRT_EINVAL;
 651         return MSVCRT_EINVAL;
 652     }
 653
 654     pos = buffer+64;
 655     *pos = '\0';
 656
 657     do {
 658         digit = value%radix;
 659         value /= radix;
 660
 661         if(digit < 10)
 662             *--pos = '0'+digit;
 663         else
 664             *--pos = 'a'+digit-10;
 665     }while(value != 0);
 666
 667     if(buffer-pos+65 > size) {
 668         MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
 669         *MSVCRT__errno() = MSVCRT_EINVAL;
 670         return MSVCRT_EINVAL;
 671     }
 672
 673     memcpy(str, pos, buffer-pos+65);
 674     return 0;
 675 }
 676
 677 #define I10_OUTPUT_MAX_PREC 21
 678 /* Internal structure used by $I10_OUTPUT */
 679 struct _I10_OUTPUT_DATA {
 680     short pos;
 681     char sign;
 682     BYTE len;
 683     char str[I10_OUTPUT_MAX_PREC+1]; /* add space for '\0' */
 684 };
 685
 686 /*********************************************************************
 687  *              $I10_OUTPUT (MSVCRT.@)
 688  * ld - long double to be printed to data
 689  * prec - precision of part, we're interested in
 690  * flag - 0 for first prec digits, 1 for fractional part
 691  * data - data to be populated
 692  *
 693  * return value
 694  *      0 if given double is NaN or INF
 695  *      1 otherwise
 696  *
 697  * FIXME
 698  *      Native sets last byte of data->str to '0' or '9', I don't know what
 699  *      it means. Current implementation sets it always to '0'.
 700  */
 701 int CDECL MSVCRT_I10_OUTPUT(MSVCRT__LDOUBLE ld, int prec, int flag, struct _I10_OUTPUT_DATA *data)
 702 {
 703     static const char inf_str[] = "1#INF";
 704     static const char nan_str[] = "1#QNAN";
 705
 706     double d = ld.x;
 707     char format[8];
 708     char buf[I10_OUTPUT_MAX_PREC+9]; /* 9 = strlen("0.e+0000") + '\0' */
 709     char *p;
 710
 711     TRACE("(%lf %d %x %p)\n", d, prec, flag, data);
 712
 713     if(d<0) {
 714         data->sign = '-';
 715         d = -d;
 716     } else
 717         data->sign = ' ';
 718
 719     if(isinf(d)) {
 720         data->pos = 1;
 721         data->len = 5;
 722         memcpy(data->str, inf_str, sizeof(inf_str));
 723
 724         return 0;
 725     }
 726
 727     if(isnan(d)) {
 728         data->pos = 1;
 729         data->len = 6;
 730         memcpy(data->str, nan_str, sizeof(nan_str));
 731
 732         return 0;
 733     }
 734
 735     if(flag&1) {
 736         int exp = 1+floor(log10(d));
 737
 738         prec += exp;
 739         if(exp < 0)
 740             prec--;
 741     }
 742     prec--;
 743
 744     if(prec+1 > I10_OUTPUT_MAX_PREC)
 745         prec = I10_OUTPUT_MAX_PREC-1;
 746     else if(prec < 0) {
 747         d = 0.0;
 748         prec = 0;
 749     }
 750
 751     sprintf(format, "%%.%dle", prec);
 752     sprintf(buf, format, d);
 753
 754     buf[1] = buf[0];
 755     data->pos = atoi(buf+prec+3);
 756     if(buf[1] != '0')
 757         data->pos++;
 758
 759     for(p = buf+prec+1; p>buf+1 && *p=='0'; p--);
 760     data->len = p-buf;
 761
 762     memcpy(data->str, buf+1, data->len);
 763     data->str[data->len] = '\0';
 764
 765     if(buf[1]!='0' && prec-data->len+1>0)
 766         memcpy(data->str+data->len+1, buf+data->len+1, prec-data->len+1);
 767
 768     return 1;
 769 }
 770 #undef I10_OUTPUT_MAX_PREC