dlls/shlwapi/wsprintf.c

   1 /*
   2  * wsprintf functions
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * NOTE:
  21  * This code is duplicated in user32. If you change something here make sure
  22  * to change it in user32 too.
  23  */
  24
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #define NO_SHLWAPI_REG
  32 #include "shlwapi.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(string);
  37
  38
  39 #define WPRINTF_LEFTALIGN   0x0001  /* Align output on the left ('-' prefix) */
  40 #define WPRINTF_PREFIX_HEX  0x0002  /* Prefix hex with 0x ('#' prefix) */
  41 #define WPRINTF_ZEROPAD     0x0004  /* Pad with zeros ('0' prefix) */
  42 #define WPRINTF_LONG        0x0008  /* Long arg ('l' prefix) */
  43 #define WPRINTF_SHORT       0x0010  /* Short arg ('h' prefix) */
  44 #define WPRINTF_UPPER_HEX   0x0020  /* Upper-case hex ('X' specifier) */
  45 #define WPRINTF_WIDE        0x0040  /* Wide arg ('w' prefix) */
  46 #define WPRINTF_INTPTR      0x0080  /* Pointer-size arg ('I' prefix) */
  47 #define WPRINTF_I64         0x0100  /* 64-bit arg ('I64' prefix) */
  48
  49 typedef enum
  50 {
  51     WPR_UNKNOWN,
  52     WPR_CHAR,
  53     WPR_WCHAR,
  54     WPR_STRING,
  55     WPR_WSTRING,
  56     WPR_SIGNED,
  57     WPR_UNSIGNED,
  58     WPR_HEXA
  59 } WPRINTF_TYPE;
  60
  61 typedef struct
  62 {
  63     UINT         flags;
  64     UINT         width;
  65     UINT         precision;
  66     WPRINTF_TYPE   type;
  67 } WPRINTF_FORMAT;
  68
  69 typedef union {
  70     WCHAR    wchar_view;
  71     CHAR     char_view;
  72     LPCSTR   lpcstr_view;
  73     LPCWSTR  lpcwstr_view;
  74     LONGLONG int_view;
  75 } WPRINTF_DATA;
  76
  77 static const CHAR null_stringA[] = "(null)";
  78 static const WCHAR null_stringW[] = { '(', 'n', 'u', 'l', 'l', ')', 0 };
  79
  80 /***********************************************************************
  81  *           WPRINTF_ParseFormatA
  82  *
  83  * Parse a format specification. A format specification has the form:
  84  *
  85  * [-][#][0][width][.precision]type
  86  *
  87  * Return value is the length of the format specification in characters.
  88  */
  89 static INT WPRINTF_ParseFormatA( LPCSTR format, WPRINTF_FORMAT *res )
  90 {
  91     LPCSTR p = format;
  92
  93     res->flags = 0;
  94     res->width = 0;
  95     res->precision = 0;
  96     if (*p == '-') { res->flags |= WPRINTF_LEFTALIGN; p++; }
  97     if (*p == '#') { res->flags |= WPRINTF_PREFIX_HEX; p++; }
  98     if (*p == '0') { res->flags |= WPRINTF_ZEROPAD; p++; }
  99     while ((*p >= '0') && (*p <= '9'))  /* width field */
 100     {
 101         res->width = res->width * 10 + *p - '0';
 102         p++;
 103     }
 104     if (*p == '.')  /* precision field */
 105     {
 106         p++;
 107         while ((*p >= '0') && (*p <= '9'))
 108         {
 109             res->precision = res->precision * 10 + *p - '0';
 110             p++;
 111         }
 112     }
 113     if (*p == 'l') { res->flags |= WPRINTF_LONG; p++; }
 114     else if (*p == 'h') { res->flags |= WPRINTF_SHORT; p++; }
 115     else if (*p == 'w') { res->flags |= WPRINTF_WIDE; p++; }
 116     else if (*p == 'I')
 117     {
 118         if (p[1] == '6' && p[2] == '4') { res->flags |= WPRINTF_I64; p += 3; }
 119         else if (p[1] == '3' && p[2] == '2') p += 3;
 120         else { res->flags |= WPRINTF_INTPTR; p++; }
 121     }
 122     switch(*p)
 123     {
 124     case 'c':
 125         res->type = (res->flags & WPRINTF_LONG) ? WPR_WCHAR : WPR_CHAR;
 126         break;
 127     case 'C':
 128         res->type = (res->flags & WPRINTF_SHORT) ? WPR_CHAR : WPR_WCHAR;
 129         break;
 130     case 'd':
 131     case 'i':
 132         res->type = WPR_SIGNED;
 133         break;
 134     case 's':
 135         res->type = (res->flags & (WPRINTF_LONG |WPRINTF_WIDE)) ? WPR_WSTRING : WPR_STRING;
 136         break;
 137     case 'S':
 138         res->type = (res->flags & (WPRINTF_SHORT|WPRINTF_WIDE)) ? WPR_STRING : WPR_WSTRING;
 139         break;
 140     case 'u':
 141         res->type = WPR_UNSIGNED;
 142         break;
 143     case 'p':
 144         res->width = 2 * sizeof(void *);
 145         res->flags |= WPRINTF_ZEROPAD | WPRINTF_INTPTR;
 146         /* fall through */
 147     case 'X':
 148         res->flags |= WPRINTF_UPPER_HEX;
 149         /* fall through */
 150     case 'x':
 151         res->type = WPR_HEXA;
 152         break;
 153     default: /* unknown format char */
 154         res->type = WPR_UNKNOWN;
 155         p--;  /* print format as normal char */
 156         break;
 157     }
 158     return (INT)(p - format) + 1;
 159 }
 160
 161
 162 /***********************************************************************
 163  *           WPRINTF_ParseFormatW
 164  *
 165  * Parse a format specification. A format specification has the form:
 166  *
 167  * [-][#][0][width][.precision]type
 168  *
 169  * Return value is the length of the format specification in characters.
 170  */
 171 static INT WPRINTF_ParseFormatW( LPCWSTR format, WPRINTF_FORMAT *res )
 172 {
 173     LPCWSTR p = format;
 174
 175     res->flags = 0;
 176     res->width = 0;
 177     res->precision = 0;
 178     if (*p == '-') { res->flags |= WPRINTF_LEFTALIGN; p++; }
 179     if (*p == '#') { res->flags |= WPRINTF_PREFIX_HEX; p++; }
 180     if (*p == '0') { res->flags |= WPRINTF_ZEROPAD; p++; }
 181     while ((*p >= '0') && (*p <= '9'))  /* width field */
 182     {
 183         res->width = res->width * 10 + *p - '0';
 184         p++;
 185     }
 186     if (*p == '.')  /* precision field */
 187     {
 188         p++;
 189         while ((*p >= '0') && (*p <= '9'))
 190         {
 191             res->precision = res->precision * 10 + *p - '0';
 192             p++;
 193         }
 194     }
 195     if (*p == 'l') { res->flags |= WPRINTF_LONG; p++; }
 196     else if (*p == 'h') { res->flags |= WPRINTF_SHORT; p++; }
 197     else if (*p == 'w') { res->flags |= WPRINTF_WIDE; p++; }
 198     else if (*p == 'I')
 199     {
 200         if (p[1] == '6' && p[2] == '4') { res->flags |= WPRINTF_I64; p += 3; }
 201         else if (p[1] == '3' && p[2] == '2') p += 3;
 202         else { res->flags |= WPRINTF_INTPTR; p++; }
 203     }
 204     switch(*p)
 205     {
 206     case 'c':
 207         res->type = (res->flags & WPRINTF_SHORT) ? WPR_CHAR : WPR_WCHAR;
 208         break;
 209     case 'C':
 210         res->type = (res->flags & WPRINTF_LONG) ? WPR_WCHAR : WPR_CHAR;
 211         break;
 212     case 'd':
 213     case 'i':
 214         res->type = WPR_SIGNED;
 215         break;
 216     case 's':
 217         res->type = ((res->flags & WPRINTF_SHORT) && !(res->flags & WPRINTF_WIDE)) ? WPR_STRING : WPR_WSTRING;
 218         break;
 219     case 'S':
 220         res->type = (res->flags & (WPRINTF_LONG|WPRINTF_WIDE)) ? WPR_WSTRING : WPR_STRING;
 221         break;
 222     case 'u':
 223         res->type = WPR_UNSIGNED;
 224         break;
 225     case 'p':
 226         res->width = 2 * sizeof(void *);
 227         res->flags |= WPRINTF_ZEROPAD | WPRINTF_INTPTR;
 228         /* fall through */
 229     case 'X':
 230         res->flags |= WPRINTF_UPPER_HEX;
 231         /* fall through */
 232     case 'x':
 233         res->type = WPR_HEXA;
 234         break;
 235     default:
 236         res->type = WPR_UNKNOWN;
 237         p--;  /* print format as normal char */
 238         break;
 239     }
 240     return (INT)(p - format) + 1;
 241 }
 242
 243
 244 /***********************************************************************
 245  *           WPRINTF_GetLen
 246  */
 247 static UINT WPRINTF_GetLen( WPRINTF_FORMAT *format, WPRINTF_DATA *arg,
 248                             LPSTR number, UINT maxlen, BOOL dst_is_wide )
 249 {
 250     UINT len;
 251
 252     if (format->flags & WPRINTF_LEFTALIGN) format->flags &= ~WPRINTF_ZEROPAD;
 253     if (format->width > maxlen) format->width = maxlen;
 254     switch(format->type)
 255     {
 256     case WPR_CHAR:
 257         return (format->precision = 1);
 258     case WPR_WCHAR:
 259         if (dst_is_wide) len = 1;
 260         else len = WideCharToMultiByte( CP_ACP, 0, &arg->wchar_view, 1, NULL, 0, NULL, NULL );
 261         return (format->precision = len);
 262     case WPR_STRING:
 263         if (!arg->lpcstr_view) arg->lpcstr_view = null_stringA;
 264         if (dst_is_wide)
 265         {
 266             LPCSTR p = arg->lpcstr_view;
 267             for (len = 0; (!format->precision || len < format->precision) && *p; p++)
 268             {
 269                 /* This isn't applicable for UTF-8 and UTF-7 */
 270                 if (IsDBCSLeadByte( *p )) p++;
 271                 len++;
 272                 if (!*p) break;
 273             }
 274         }
 275         else
 276         {
 277             for (len = 0; !format->precision || (len < format->precision); len++)
 278                 if (!*(arg->lpcstr_view + len)) break;
 279         }
 280         if (len > maxlen) len = maxlen;
 281         return (format->precision = len);
 282     case WPR_WSTRING:
 283         if (!arg->lpcwstr_view) arg->lpcwstr_view = null_stringW;
 284         if (dst_is_wide)
 285         {
 286             for (len = 0; !format->precision || (len < format->precision); len++)
 287                 if (!*(arg->lpcwstr_view + len)) break;
 288         }
 289         else
 290         {
 291             LPCWSTR p = arg->lpcwstr_view;
 292             for (len = 0; (!format->precision || len < format->precision) && *p; p++)
 293                 len += WideCharToMultiByte( CP_ACP, 0, p, 1, NULL, 0, NULL, NULL );
 294             if (format->precision && len > format->precision) len = format->precision;
 295         }
 296         if (len > maxlen) len = maxlen;
 297         return (format->precision = len);
 298     case WPR_SIGNED:
 299     case WPR_UNSIGNED:
 300     case WPR_HEXA:
 301     {
 302         const char *digits = (format->flags & WPRINTF_UPPER_HEX) ? "0123456789ABCDEF" : "0123456789abcdef";
 303         ULONGLONG num = arg->int_view;
 304         int base = format->type == WPR_HEXA ? 16 : 10;
 305         char buffer[20], *p = buffer, *dst = number;
 306
 307         if (format->type == WPR_SIGNED && arg->int_view < 0)
 308         {
 309             *dst++ = '-';
 310             num = -arg->int_view;
 311         }
 312         if (format->flags & WPRINTF_INTPTR) num = (UINT_PTR)num;
 313         else if (!(format->flags & WPRINTF_I64)) num = (UINT)num;
 314
 315         do
 316         {
 317             *p++ = digits[num % base];
 318             num /= base;
 319         } while (num);
 320         while (p > buffer) *dst++ = *(--p);
 321         *dst = 0;
 322         len = dst - number;
 323         break;
 324     }
 325     default:
 326         return 0;
 327     }
 328     if (len > maxlen) len = maxlen;
 329     if (format->precision < len) format->precision = len;
 330     if (format->precision > maxlen) format->precision = maxlen;
 331     if ((format->flags & WPRINTF_ZEROPAD) && (format->width > format->precision))
 332         format->precision = format->width;
 333     if (format->flags & WPRINTF_PREFIX_HEX) len += 2;
 334     return len;
 335 }
 336
 337
 338 /***********************************************************************
 339  *           wvnsprintfA   (SHLWAPI.@)
 340  *
 341  * Print formatted output to a string, up to a maximum number of chars.
 342  *
 343  * PARAMS
 344  * buffer [O] Destination for output string
 345  * maxlen [I] Maximum number of characters to write
 346  * spec   [I] Format string
 347  *
 348  * RETURNS
 349  *  Success: The number of characters written.
 350  *  Failure: -1.
 351  */
 352 INT WINAPI wvnsprintfA( LPSTR buffer, INT maxlen, LPCSTR spec, __ms_va_list args )
 353 {
 354     WPRINTF_FORMAT format;
 355     LPSTR p = buffer;
 356     UINT i, len, sign;
 357     CHAR number[21]; /* 64bit number can be 18446744073709551616 which is 20 chars. and a \0 */
 358     WPRINTF_DATA argData;
 359
 360     TRACE("%p %u %s\n", buffer, maxlen, debugstr_a(spec));
 361
 362     while (*spec && (maxlen > 1))
 363     {
 364         if (*spec != '%') { *p++ = *spec++; maxlen--; continue; }
 365         spec++;
 366         if (*spec == '%') { *p++ = *spec++; maxlen--; continue; }
 367         spec += WPRINTF_ParseFormatA( spec, &format );
 368
 369         switch(format.type)
 370         {
 371         case WPR_WCHAR:
 372             argData.wchar_view = (WCHAR)va_arg( args, int );
 373             break;
 374         case WPR_CHAR:
 375             argData.char_view = (CHAR)va_arg( args, int );
 376             break;
 377         case WPR_STRING:
 378             argData.lpcstr_view = va_arg( args, LPCSTR );
 379             break;
 380         case WPR_WSTRING:
 381             argData.lpcwstr_view = va_arg( args, LPCWSTR );
 382             break;
 383         case WPR_HEXA:
 384         case WPR_SIGNED:
 385         case WPR_UNSIGNED:
 386             if (format.flags & WPRINTF_INTPTR) argData.int_view = va_arg(args, INT_PTR);
 387             else if (format.flags & WPRINTF_I64) argData.int_view = va_arg(args, LONGLONG);
 388             else argData.int_view = va_arg(args, INT);
 389             break;
 390         default:
 391             argData.wchar_view = 0;
 392             break;
 393         }
 394
 395         len = WPRINTF_GetLen( &format, &argData, number, maxlen - 1, FALSE );
 396         sign = 0;
 397         if (!(format.flags & WPRINTF_LEFTALIGN))
 398             for (i = format.precision; i < format.width; i++, maxlen--)
 399                 *p++ = ' ';
 400         switch(format.type)
 401         {
 402         case WPR_WCHAR:
 403             {
 404                 CHAR mb[5];
 405                 if (WideCharToMultiByte( CP_ACP, 0, &argData.wchar_view, 1, mb, sizeof(mb), NULL, NULL ))
 406                 {
 407                     memcpy( p, mb, len );
 408                     p += len;
 409                 }
 410             }
 411             break;
 412         case WPR_CHAR:
 413             *p++ = argData.char_view;
 414             break;
 415         case WPR_STRING:
 416             memcpy( p, argData.lpcstr_view, len );
 417             p += len;
 418             break;
 419         case WPR_WSTRING:
 420             {
 421                 LPCWSTR ptr = argData.lpcwstr_view;
 422                 for (i = 0; i < len; ptr++)
 423                 {
 424                     CHAR mb[5]; /* 5 is MB_LEN_MAX */
 425                     int ret = WideCharToMultiByte( CP_ACP, 0, ptr, 1, mb, sizeof(mb), NULL, NULL );
 426                     i += ret;
 427                     if (i > len) ret = len - (p - buffer);
 428                     memcpy( p, mb, ret );
 429                     p += ret;
 430                 }
 431             }
 432             break;
 433         case WPR_HEXA:
 434             if ((format.flags & WPRINTF_PREFIX_HEX) && (maxlen > 3))
 435             {
 436                 *p++ = '0';
 437                 *p++ = (format.flags & WPRINTF_UPPER_HEX) ? 'X' : 'x';
 438                 maxlen -= 2;
 439                 len -= 2;
 440             }
 441             /* fall through */
 442         case WPR_SIGNED:
 443             /* Transfer the sign now, just in case it will be zero-padded*/
 444             if (number[0] == '-')
 445             {
 446                 *p++ = '-';
 447                 sign = 1;
 448             }
 449             /* fall through */
 450         case WPR_UNSIGNED:
 451             for (i = len; i < format.precision; i++, maxlen--) *p++ = '0';
 452             memcpy( p, number + sign, len - sign  );
 453             p += len - sign;
 454             break;
 455         case WPR_UNKNOWN:
 456             continue;
 457         }
 458         if (format.flags & WPRINTF_LEFTALIGN)
 459             for (i = format.precision; i < format.width; i++, maxlen--)
 460                 *p++ = ' ';
 461         maxlen -= len;
 462     }
 463     *p = 0;
 464     TRACE("%s\n",debugstr_a(buffer));
 465     return (maxlen > 1) ? (INT)(p - buffer) : -1;
 466 }
 467
 468
 469 /***********************************************************************
 470  *           wvnsprintfW   (SHLWAPI.@)
 471  *
 472  * See wvnsprintfA.
 473  */
 474 INT WINAPI wvnsprintfW( LPWSTR buffer, INT maxlen, LPCWSTR spec, __ms_va_list args )
 475 {
 476     WPRINTF_FORMAT format;
 477     LPWSTR p = buffer;
 478     UINT i, len, sign;
 479     CHAR number[21]; /* 64bit number can be 18446744073709551616 which is 20 chars. and a \0 */
 480     WPRINTF_DATA argData;
 481
 482     TRACE("%p %u %s\n", buffer, maxlen, debugstr_w(spec));
 483
 484     while (*spec && (maxlen > 1))
 485     {
 486         if (*spec != '%') { *p++ = *spec++; maxlen--; continue; }
 487         spec++;
 488         if (*spec == '%') { *p++ = *spec++; maxlen--; continue; }
 489         spec += WPRINTF_ParseFormatW( spec, &format );
 490
 491         switch(format.type)
 492         {
 493         case WPR_WCHAR:
 494             argData.wchar_view = (WCHAR)va_arg( args, int );
 495             break;
 496         case WPR_CHAR:
 497             argData.char_view = (CHAR)va_arg( args, int );
 498             break;
 499         case WPR_STRING:
 500             argData.lpcstr_view = va_arg( args, LPCSTR );
 501             break;
 502         case WPR_WSTRING:
 503             argData.lpcwstr_view = va_arg( args, LPCWSTR );
 504             break;
 505         case WPR_HEXA:
 506         case WPR_SIGNED:
 507         case WPR_UNSIGNED:
 508             if (format.flags & WPRINTF_INTPTR) argData.int_view = va_arg(args, INT_PTR);
 509             else if (format.flags & WPRINTF_I64) argData.int_view = va_arg(args, LONGLONG);
 510             else argData.int_view = va_arg(args, INT);
 511             break;
 512         default:
 513             argData.wchar_view = 0;
 514             break;
 515         }
 516
 517         len = WPRINTF_GetLen( &format, &argData, number, maxlen - 1, TRUE );
 518         sign = 0;
 519         if (!(format.flags & WPRINTF_LEFTALIGN))
 520             for (i = format.precision; i < format.width; i++, maxlen--)
 521                 *p++ = ' ';
 522         switch(format.type)
 523         {
 524         case WPR_WCHAR:
 525             *p++ = argData.wchar_view;
 526             break;
 527         case WPR_CHAR:
 528             {
 529                 WCHAR wc;
 530                 if (!IsDBCSLeadByte( (BYTE)argData.char_view )
 531                     && MultiByteToWideChar( CP_ACP, 0, &argData.char_view, 1, &wc, 1 ) > 0)
 532                     *p++ = wc;
 533                 else
 534                     *p++ = 0;
 535                 break;
 536             }
 537         case WPR_STRING:
 538             {
 539                 LPCSTR ptr = argData.lpcstr_view;
 540                 for (i = 0; i < len; i++)
 541                 {
 542                     WCHAR buf[2]; /* for LeadByte + NUL case, we need 2 WCHARs. */
 543                     int ret, mb_len = IsDBCSLeadByte( *ptr ) ? 2 : 1;
 544                     ret = MultiByteToWideChar( CP_ACP, 0, ptr, mb_len, buf, ARRAY_SIZE( buf ));
 545                     *p++ = buf[ret - 1];
 546                     ptr += mb_len;
 547                 }
 548             }
 549             break;
 550         case WPR_WSTRING:
 551             if (len) memcpy( p, argData.lpcwstr_view, len * sizeof(WCHAR) );
 552             p += len;
 553             break;
 554         case WPR_HEXA:
 555             if ((format.flags & WPRINTF_PREFIX_HEX) && (maxlen > 3))
 556             {
 557                 *p++ = '0';
 558                 *p++ = (format.flags & WPRINTF_UPPER_HEX) ? 'X' : 'x';
 559                 maxlen -= 2;
 560                 len -= 2;
 561             }
 562             /* fall through */
 563         case WPR_SIGNED:
 564             /* Transfer the sign now, just in case it will be zero-padded*/
 565             if (number[0] == '-')
 566             {
 567                 *p++ = '-';
 568                 sign = 1;
 569             }
 570             /* fall through */
 571         case WPR_UNSIGNED:
 572             for (i = len; i < format.precision; i++, maxlen--) *p++ = '0';
 573             for (i = sign; i < len; i++) *p++ = (BYTE)number[i];
 574             break;
 575         case WPR_UNKNOWN:
 576             continue;
 577         }
 578         if (format.flags & WPRINTF_LEFTALIGN)
 579             for (i = format.precision; i < format.width; i++, maxlen--)
 580                 *p++ = ' ';
 581         maxlen -= len;
 582     }
 583     *p = 0;
 584     TRACE("%s\n",debugstr_w(buffer));
 585     return (maxlen > 1) ? (INT)(p - buffer) : -1;
 586 }
 587
 588
 589 /*************************************************************************
 590  *           wnsprintfA   (SHLWAPI.@)
 591  *
 592  * Print formatted output to a string, up to a maximum number of chars.
 593  *
 594  * PARAMS
 595  * lpOut      [O] Destination for output string
 596  * cchLimitIn [I] Maximum number of characters to write
 597  * lpFmt      [I] Format string
 598  *
 599  * RETURNS
 600  *  Success: The number of characters written.
 601  *  Failure: -1.
 602  */
 603 int WINAPIV wnsprintfA(LPSTR lpOut, int cchLimitIn, LPCSTR lpFmt, ...)
 604 {
 605     __ms_va_list valist;
 606     INT res;
 607
 608     __ms_va_start( valist, lpFmt );
 609     res = wvnsprintfA( lpOut, cchLimitIn, lpFmt, valist );
 610     __ms_va_end( valist );
 611     return res;
 612 }
 613
 614
 615 /*************************************************************************
 616  *           wnsprintfW   (SHLWAPI.@)
 617  *
 618  * See wnsprintfA.
 619  */
 620 int WINAPIV wnsprintfW(LPWSTR lpOut, int cchLimitIn, LPCWSTR lpFmt, ...)
 621 {
 622     __ms_va_list valist;
 623     INT res;
 624
 625     __ms_va_start( valist, lpFmt );
 626     res = wvnsprintfW( lpOut, cchLimitIn, lpFmt, valist );
 627     __ms_va_end( valist );
 628     return res;
 629 }