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 )
 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     case WPR_WCHAR:
 258         return (format->precision = 1);
 259     case WPR_STRING:
 260         if (!arg->lpcstr_view) arg->lpcstr_view = null_stringA;
 261         for (len = 0; !format->precision || (len < format->precision); len++)
 262             if (!*(arg->lpcstr_view + len)) break;
 263         if (len > maxlen) len = maxlen;
 264         return (format->precision = len);
 265     case WPR_WSTRING:
 266         if (!arg->lpcwstr_view) arg->lpcwstr_view = null_stringW;
 267         for (len = 0; !format->precision || (len < format->precision); len++)
 268             if (!*(arg->lpcwstr_view + len)) break;
 269         if (len > maxlen) len = maxlen;
 270         return (format->precision = len);
 271     case WPR_SIGNED:
 272     case WPR_UNSIGNED:
 273     case WPR_HEXA:
 274     {
 275         const char *digits = (format->flags & WPRINTF_UPPER_HEX) ? "0123456789ABCDEF" : "0123456789abcdef";
 276         ULONGLONG num = arg->int_view;
 277         int base = format->type == WPR_HEXA ? 16 : 10;
 278         char buffer[20], *p = buffer, *dst = number;
 279
 280         if (format->type == WPR_SIGNED && arg->int_view < 0)
 281         {
 282             *dst++ = '-';
 283             num = -arg->int_view;
 284         }
 285         if (format->flags & WPRINTF_INTPTR) num = (UINT_PTR)num;
 286         else if (!(format->flags & WPRINTF_I64)) num = (UINT)num;
 287
 288         do
 289         {
 290             *p++ = digits[num % base];
 291             num /= base;
 292         } while (num);
 293         while (p > buffer) *dst++ = *(--p);
 294         *dst = 0;
 295         len = dst - number;
 296         break;
 297     }
 298     default:
 299         return 0;
 300     }
 301     if (len > maxlen) len = maxlen;
 302     if (format->precision < len) format->precision = len;
 303     if (format->precision > maxlen) format->precision = maxlen;
 304     if ((format->flags & WPRINTF_ZEROPAD) && (format->width > format->precision))
 305         format->precision = format->width;
 306     if (format->flags & WPRINTF_PREFIX_HEX) len += 2;
 307     return len;
 308 }
 309
 310
 311 /***********************************************************************
 312  *           wvnsprintfA   (SHLWAPI.@)
 313  *
 314  * Print formatted output to a string, up to a maximum number of chars.
 315  *
 316  * PARAMS
 317  * buffer [O] Destination for output string
 318  * maxlen [I] Maximum number of characters to write
 319  * spec   [I] Format string
 320  *
 321  * RETURNS
 322  *  Success: The number of characters written.
 323  *  Failure: -1.
 324  */
 325 INT WINAPI wvnsprintfA( LPSTR buffer, INT maxlen, LPCSTR spec, __ms_va_list args )
 326 {
 327     WPRINTF_FORMAT format;
 328     LPSTR p = buffer;
 329     UINT i, len, sign;
 330     CHAR number[20];
 331     WPRINTF_DATA argData;
 332
 333     TRACE("%p %u %s\n", buffer, maxlen, debugstr_a(spec));
 334
 335     while (*spec && (maxlen > 1))
 336     {
 337         if (*spec != '%') { *p++ = *spec++; maxlen--; continue; }
 338         spec++;
 339         if (*spec == '%') { *p++ = *spec++; maxlen--; continue; }
 340         spec += WPRINTF_ParseFormatA( spec, &format );
 341
 342         switch(format.type)
 343         {
 344         case WPR_WCHAR:
 345             argData.wchar_view = (WCHAR)va_arg( args, int );
 346             break;
 347         case WPR_CHAR:
 348             argData.char_view = (CHAR)va_arg( args, int );
 349             break;
 350         case WPR_STRING:
 351             argData.lpcstr_view = va_arg( args, LPCSTR );
 352             break;
 353         case WPR_WSTRING:
 354             argData.lpcwstr_view = va_arg( args, LPCWSTR );
 355             break;
 356         case WPR_HEXA:
 357         case WPR_SIGNED:
 358         case WPR_UNSIGNED:
 359             if (format.flags & WPRINTF_INTPTR) argData.int_view = va_arg(args, INT_PTR);
 360             else if (format.flags & WPRINTF_I64) argData.int_view = va_arg(args, LONGLONG);
 361             else argData.int_view = va_arg(args, INT);
 362             break;
 363         default:
 364             argData.wchar_view = 0;
 365             break;
 366         }
 367
 368         len = WPRINTF_GetLen( &format, &argData, number, maxlen - 1 );
 369         sign = 0;
 370         if (!(format.flags & WPRINTF_LEFTALIGN))
 371             for (i = format.precision; i < format.width; i++, maxlen--)
 372                 *p++ = ' ';
 373         switch(format.type)
 374         {
 375         case WPR_WCHAR:
 376             *p++ = argData.wchar_view;
 377             break;
 378         case WPR_CHAR:
 379             *p++ = argData.char_view;
 380             break;
 381         case WPR_STRING:
 382             memcpy( p, argData.lpcstr_view, len );
 383             p += len;
 384             break;
 385         case WPR_WSTRING:
 386             {
 387                 LPCWSTR ptr = argData.lpcwstr_view;
 388                 for (i = 0; i < len; i++) *p++ = (CHAR)*ptr++;
 389             }
 390             break;
 391         case WPR_HEXA:
 392             if ((format.flags & WPRINTF_PREFIX_HEX) && (maxlen > 3))
 393             {
 394                 *p++ = '0';
 395                 *p++ = (format.flags & WPRINTF_UPPER_HEX) ? 'X' : 'x';
 396                 maxlen -= 2;
 397                 len -= 2;
 398             }
 399             /* fall through */
 400         case WPR_SIGNED:
 401             /* Transfer the sign now, just in case it will be zero-padded*/
 402             if (number[0] == '-')
 403             {
 404                 *p++ = '-';
 405                 sign = 1;
 406             }
 407             /* fall through */
 408         case WPR_UNSIGNED:
 409             for (i = len; i < format.precision; i++, maxlen--) *p++ = '0';
 410             memcpy( p, number + sign, len - sign  );
 411             p += len - sign;
 412             break;
 413         case WPR_UNKNOWN:
 414             continue;
 415         }
 416         if (format.flags & WPRINTF_LEFTALIGN)
 417             for (i = format.precision; i < format.width; i++, maxlen--)
 418                 *p++ = ' ';
 419         maxlen -= len;
 420     }
 421     *p = 0;
 422     TRACE("%s\n",debugstr_a(buffer));
 423     return (maxlen > 1) ? (INT)(p - buffer) : -1;
 424 }
 425
 426
 427 /***********************************************************************
 428  *           wvnsprintfW   (SHLWAPI.@)
 429  *
 430  * See wvnsprintfA.
 431  */
 432 INT WINAPI wvnsprintfW( LPWSTR buffer, INT maxlen, LPCWSTR spec, __ms_va_list args )
 433 {
 434     WPRINTF_FORMAT format;
 435     LPWSTR p = buffer;
 436     UINT i, len, sign;
 437     CHAR number[20];
 438     WPRINTF_DATA argData;
 439
 440     TRACE("%p %u %s\n", buffer, maxlen, debugstr_w(spec));
 441
 442     while (*spec && (maxlen > 1))
 443     {
 444         if (*spec != '%') { *p++ = *spec++; maxlen--; continue; }
 445         spec++;
 446         if (*spec == '%') { *p++ = *spec++; maxlen--; continue; }
 447         spec += WPRINTF_ParseFormatW( spec, &format );
 448
 449         switch(format.type)
 450         {
 451         case WPR_WCHAR:
 452             argData.wchar_view = (WCHAR)va_arg( args, int );
 453             break;
 454         case WPR_CHAR:
 455             argData.char_view = (CHAR)va_arg( args, int );
 456             break;
 457         case WPR_STRING:
 458             argData.lpcstr_view = va_arg( args, LPCSTR );
 459             break;
 460         case WPR_WSTRING:
 461             argData.lpcwstr_view = va_arg( args, LPCWSTR );
 462             break;
 463         case WPR_HEXA:
 464         case WPR_SIGNED:
 465         case WPR_UNSIGNED:
 466             if (format.flags & WPRINTF_INTPTR) argData.int_view = va_arg(args, INT_PTR);
 467             else if (format.flags & WPRINTF_I64) argData.int_view = va_arg(args, LONGLONG);
 468             else argData.int_view = va_arg(args, INT);
 469             break;
 470         default:
 471             argData.wchar_view = 0;
 472             break;
 473         }
 474
 475         len = WPRINTF_GetLen( &format, &argData, number, maxlen - 1 );
 476         sign = 0;
 477         if (!(format.flags & WPRINTF_LEFTALIGN))
 478             for (i = format.precision; i < format.width; i++, maxlen--)
 479                 *p++ = ' ';
 480         switch(format.type)
 481         {
 482         case WPR_WCHAR:
 483             *p++ = argData.wchar_view;
 484             break;
 485         case WPR_CHAR:
 486             *p++ = argData.char_view;
 487             break;
 488         case WPR_STRING:
 489             {
 490                 LPCSTR ptr = argData.lpcstr_view;
 491                 for (i = 0; i < len; i++) *p++ = (BYTE)*ptr++;
 492             }
 493             break;
 494         case WPR_WSTRING:
 495             if (len) memcpy( p, argData.lpcwstr_view, len * sizeof(WCHAR) );
 496             p += len;
 497             break;
 498         case WPR_HEXA:
 499             if ((format.flags & WPRINTF_PREFIX_HEX) && (maxlen > 3))
 500             {
 501                 *p++ = '0';
 502                 *p++ = (format.flags & WPRINTF_UPPER_HEX) ? 'X' : 'x';
 503                 maxlen -= 2;
 504                 len -= 2;
 505             }
 506             /* fall through */
 507         case WPR_SIGNED:
 508             /* Transfer the sign now, just in case it will be zero-padded*/
 509             if (number[0] == '-')
 510             {
 511                 *p++ = '-';
 512                 sign = 1;
 513             }
 514             /* fall through */
 515         case WPR_UNSIGNED:
 516             for (i = len; i < format.precision; i++, maxlen--) *p++ = '0';
 517             for (i = sign; i < len; i++) *p++ = (BYTE)number[i];
 518             break;
 519         case WPR_UNKNOWN:
 520             continue;
 521         }
 522         if (format.flags & WPRINTF_LEFTALIGN)
 523             for (i = format.precision; i < format.width; i++, maxlen--)
 524                 *p++ = ' ';
 525         maxlen -= len;
 526     }
 527     *p = 0;
 528     TRACE("%s\n",debugstr_w(buffer));
 529     return (maxlen > 1) ? (INT)(p - buffer) : -1;
 530 }
 531
 532
 533 /*************************************************************************
 534  *           wnsprintfA   (SHLWAPI.@)
 535  *
 536  * Print formatted output to a string, up to a maximum number of chars.
 537  *
 538  * PARAMS
 539  * lpOut      [O] Destination for output string
 540  * cchLimitIn [I] Maximum number of characters to write
 541  * lpFmt      [I] Format string
 542  *
 543  * RETURNS
 544  *  Success: The number of characters written.
 545  *  Failure: -1.
 546  */
 547 int WINAPIV wnsprintfA(LPSTR lpOut, int cchLimitIn, LPCSTR lpFmt, ...)
 548 {
 549     __ms_va_list valist;
 550     INT res;
 551
 552     __ms_va_start( valist, lpFmt );
 553     res = wvnsprintfA( lpOut, cchLimitIn, lpFmt, valist );
 554     __ms_va_end( valist );
 555     return res;
 556 }
 557
 558
 559 /*************************************************************************
 560  *           wnsprintfW   (SHLWAPI.@)
 561  *
 562  * See wnsprintfA.
 563  */
 564 int WINAPIV wnsprintfW(LPWSTR lpOut, int cchLimitIn, LPCWSTR lpFmt, ...)
 565 {
 566     __ms_va_list valist;
 567     INT res;
 568
 569     __ms_va_start( valist, lpFmt );
 570     res = wvnsprintfW( lpOut, cchLimitIn, lpFmt, valist );
 571     __ms_va_end( valist );
 572     return res;
 573 }