dlls/kernel32/format_msg.c

   1 /*
   2  * FormatMessage implementation
   3  *
   4  * Copyright 1996 Marcus Meissner
   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
  21 #include "config.h"
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winerror.h"
  32 #include "winternl.h"
  33 #include "winuser.h"
  34 #include "winnls.h"
  35 #include "wine/unicode.h"
  36 #include "kernel_private.h"
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(resource);
  40
  41
  42 /* Messages...used by FormatMessage (KERNEL32.something)
  43  *
  44  * They can be specified either directly or using a message ID and
  45  * loading them from the resource.
  46  *
  47  * The resourcedata has following format:
  48  * start:
  49  * 0: DWORD nrofentries
  50  * nrofentries * subentry:
  51  *      0: DWORD firstentry
  52  *      4: DWORD lastentry
  53  *      8: DWORD offset from start to the stringentries
  54  *
  55  * (lastentry-firstentry) * stringentry:
  56  * 0: WORD len (0 marks end)    [ includes the 4 byte header length ]
  57  * 2: WORD flags
  58  * 4: CHAR[len-4]
  59  *      (stringentry i of a subentry refers to the ID 'firstentry+i')
  60  *
  61  * Yes, ANSI strings in win32 resources. Go figure.
  62  */
  63
  64 static const WCHAR PCNTFMTWSTR[] = { '%','%','%','s',0 };
  65 static const WCHAR FMTWSTR[] = { '%','s',0 };
  66
  67 /**********************************************************************
  68  *      load_messageW           (internal)
  69  */
  70 static LPWSTR load_messageW( HMODULE module, UINT id, WORD lang )
  71 {
  72     const MESSAGE_RESOURCE_ENTRY *mre;
  73     WCHAR *buffer;
  74
  75     TRACE("module = %p, id = %08x\n", module, id );
  76
  77     if (!module) module = GetModuleHandleW( NULL );
  78     if (RtlFindMessage( module, RT_MESSAGETABLE, lang, id, &mre ) != STATUS_SUCCESS) return NULL;
  79
  80     if (mre->Flags & MESSAGE_RESOURCE_UNICODE)
  81     {
  82         int len = (strlenW( (const WCHAR *)mre->Text ) + 1) * sizeof(WCHAR);
  83         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, len ))) return NULL;
  84         memcpy( buffer, mre->Text, len );
  85     }
  86     else
  87     {
  88         int len = MultiByteToWideChar( CP_ACP, 0, (const char *)mre->Text, -1, NULL, 0 );
  89         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) ))) return NULL;
  90         MultiByteToWideChar( CP_ACP, 0, (const char*)mre->Text, -1, buffer, len );
  91     }
  92     TRACE("returning %s\n", wine_dbgstr_w(buffer));
  93     return buffer;
  94 }
  95
  96
  97 /**********************************************************************
  98  *      load_messageA           (internal)
  99  */
 100 static LPSTR load_messageA( HMODULE module, UINT id, WORD lang )
 101 {
 102     const MESSAGE_RESOURCE_ENTRY *mre;
 103     char *buffer;
 104
 105     TRACE("module = %p, id = %08x\n", module, id );
 106
 107     if (!module) module = GetModuleHandleW( NULL );
 108     if (RtlFindMessage( module, RT_MESSAGETABLE, lang, id, &mre ) != STATUS_SUCCESS) return NULL;
 109
 110     if (mre->Flags & MESSAGE_RESOURCE_UNICODE)
 111     {
 112         int len = WideCharToMultiByte( CP_ACP, 0, (const WCHAR *)mre->Text, -1, NULL, 0, NULL, NULL );
 113         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, len ))) return NULL;
 114         WideCharToMultiByte( CP_ACP, 0, (const WCHAR *)mre->Text, -1, buffer, len, NULL, NULL );
 115     }
 116     else
 117     {
 118         int len = strlen((const char*)mre->Text) + 1;
 119         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, len ))) return NULL;
 120         memcpy( buffer, mre->Text, len );
 121     }
 122     TRACE("returning %s\n", wine_dbgstr_a(buffer));
 123     return buffer;
 124 }
 125
 126
 127 /***********************************************************************
 128  *           FormatMessageA   (KERNEL32.@)
 129  * FIXME: missing wrap,
 130  */
 131 DWORD WINAPI FormatMessageA(
 132         DWORD   dwFlags,
 133         LPCVOID lpSource,
 134         DWORD   dwMessageId,
 135         DWORD   dwLanguageId,
 136         LPSTR   lpBuffer,
 137         DWORD   nSize,
 138         va_list* _args )
 139 {
 140     LPDWORD args=(LPDWORD)_args;
 141     DWORD ret = 0;
 142 #if defined(__i386__) || defined(__sparc__)
 143 /* This implementation is completely dependent on the format of the va_list on x86 CPUs */
 144     LPSTR       target,t;
 145     DWORD       talloced;
 146     LPSTR       from,f;
 147     DWORD       width = dwFlags & FORMAT_MESSAGE_MAX_WIDTH_MASK;
 148     BOOL    eos = FALSE;
 149     CHAR        ch;
 150
 151     TRACE("(0x%x,%p,%d,0x%x,%p,%d,%p)\n",
 152           dwFlags,lpSource,dwMessageId,dwLanguageId,lpBuffer,nSize,args);
 153     if ((dwFlags & FORMAT_MESSAGE_FROM_STRING)
 154         &&((dwFlags & FORMAT_MESSAGE_FROM_SYSTEM)
 155            || (dwFlags & FORMAT_MESSAGE_FROM_HMODULE))) return 0;
 156
 157     if (width && width != FORMAT_MESSAGE_MAX_WIDTH_MASK)
 158         FIXME("line wrapping (%u) not supported.\n", width);
 159     from = NULL;
 160     if (dwFlags & FORMAT_MESSAGE_FROM_STRING)
 161     {
 162         from = HeapAlloc( GetProcessHeap(), 0, strlen((LPCSTR)lpSource)+1 );
 163         strcpy( from, (LPCSTR)lpSource );
 164     }
 165     else {
 166         from = NULL;
 167         if (dwFlags & FORMAT_MESSAGE_FROM_HMODULE)
 168             from = load_messageA( (HMODULE)lpSource, dwMessageId, dwLanguageId );
 169         if (!from && (dwFlags & FORMAT_MESSAGE_FROM_SYSTEM))
 170             from = load_messageA( kernel32_handle, dwMessageId, dwLanguageId );
 171
 172         if (!from)
 173         {
 174             SetLastError (ERROR_RESOURCE_LANG_NOT_FOUND);
 175             return 0;
 176         }
 177     }
 178     target      = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 100);
 179     t   = target;
 180     talloced= 100;
 181
 182 #define ADD_TO_T(c) do { \
 183         *t++=c;\
 184         if ((DWORD)(t-target) == talloced) {\
 185             target = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,target,talloced*2);\
 186             t = target+talloced;\
 187             talloced*=2;\
 188       }\
 189 } while (0)
 190
 191     if (from) {
 192         f=from;
 193         if (dwFlags & FORMAT_MESSAGE_IGNORE_INSERTS) {
 194             while (*f && !eos)
 195                 ADD_TO_T(*f++);
 196         }
 197         else {
 198             while (*f && !eos) {
 199                 if (*f=='%') {
 200                     int insertnr;
 201                     char *fmtstr,*x,*lastf;
 202                     DWORD *argliststart;
 203
 204                     fmtstr = NULL;
 205                     lastf = f;
 206                     f++;
 207                     if (!*f) {
 208                         ADD_TO_T('%');
 209                         continue;
 210                     }
 211                     switch (*f) {
 212                     case '1':case '2':case '3':case '4':case '5':
 213                     case '6':case '7':case '8':case '9':
 214                         insertnr=*f-'0';
 215                         switch (f[1]) {
 216                         case '0':case '1':case '2':case '3':
 217                         case '4':case '5':case '6':case '7':
 218                         case '8':case '9':
 219                             f++;
 220                             insertnr=insertnr*10+*f-'0';
 221                             f++;
 222                             break;
 223                         default:
 224                             f++;
 225                             break;
 226                         }
 227                         if (*f=='!') {
 228                             f++;
 229                             if (NULL!=(x=strchr(f,'!'))) {
 230                                 *x='\0';
 231                                 fmtstr=HeapAlloc(GetProcessHeap(),0,strlen(f)+2);
 232                                 sprintf(fmtstr,"%%%s",f);
 233                                 f=x+1;
 234                             } else {
 235                                 fmtstr=HeapAlloc(GetProcessHeap(),0,strlen(f)+2);
 236                                 sprintf(fmtstr,"%%%s",f);
 237                                 f+=strlen(f); /*at \0*/
 238                             }
 239                         } else {
 240                             if(!args) break;
 241                             fmtstr = HeapAlloc(GetProcessHeap(),0,3);
 242                             strcpy( fmtstr, "%s" );
 243                         }
 244                         if (args) {
 245                             int sz;
 246                             LPSTR b;
 247
 248                             if (dwFlags & FORMAT_MESSAGE_ARGUMENT_ARRAY)
 249                                 argliststart=args+insertnr-1;
 250                             else
 251                                 argliststart=(*(DWORD**)args)+insertnr-1;
 252
 253                                 /* FIXME: precision and width components are not handled correctly */
 254                             if ( (strcmp(fmtstr, "%ls") == 0) || (strcmp(fmtstr,"%S") == 0) ) {
 255                                 sz = WideCharToMultiByte( CP_ACP, 0, *(WCHAR**)argliststart, -1, NULL, 0, NULL, NULL);
 256                                 b = HeapAlloc(GetProcessHeap(), 0, sz);
 257                                 WideCharToMultiByte( CP_ACP, 0, *(WCHAR**)argliststart, -1, b, sz, NULL, NULL);
 258                             } else {
 259                                 b = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sz = 1000);
 260                                 /* CMF - This makes a BIG assumption about va_list */
 261                                 TRACE("A BIG assumption\n");
 262                                 vsnprintf(b, sz, fmtstr, (va_list) argliststart);
 263                             }
 264                             for (x=b; *x; x++) ADD_TO_T(*x);
 265
 266                             HeapFree(GetProcessHeap(),0,b);
 267                         } else {
 268                                 /* NULL args - copy formatstr
 269                                  * (probably wrong)
 270                                  */
 271                             while ((lastf<f)&&(*lastf)) {
 272                                 ADD_TO_T(*lastf++);
 273                             }
 274                         }
 275                         HeapFree(GetProcessHeap(),0,fmtstr);
 276                         break;
 277                     case 'n':
 278                         ADD_TO_T('\r');
 279                         ADD_TO_T('\n');
 280                         f++;
 281                         break;
 282                     case '0':
 283                         eos = TRUE;
 284                         f++;
 285                         break;
 286                     default:
 287                         ADD_TO_T(*f++);
 288                         break;
 289                     }
 290                 } else {
 291                     ch = *f;
 292                     f++;
 293                     if (ch == '\r') {
 294                         if (*f == '\n')
 295                             f++;
 296                         if(width)
 297                             ADD_TO_T(' ');
 298                         else
 299                         {
 300                             ADD_TO_T('\r');
 301                             ADD_TO_T('\n');
 302                         }
 303                     } else {
 304                         if (ch == '\n')
 305                         {
 306                             if(width)
 307                                 ADD_TO_T(' ');
 308                             else
 309                             {
 310                                 ADD_TO_T('\r');
 311                                 ADD_TO_T('\n');
 312                             }
 313                         }
 314                         else
 315                             ADD_TO_T(ch);
 316                     }
 317                 }
 318             }
 319         }
 320         *t='\0';
 321     }
 322     talloced = strlen(target)+1;
 323     if (nSize && talloced<nSize) {
 324         target = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,target,nSize);
 325     }
 326     TRACE("-- %s\n",debugstr_a(target));
 327     if (dwFlags & FORMAT_MESSAGE_ALLOCATE_BUFFER) {
 328         *((LPVOID*)lpBuffer) = (LPVOID)LocalAlloc(LMEM_ZEROINIT,max(nSize, talloced));
 329         memcpy(*(LPSTR*)lpBuffer,target,talloced);
 330     } else {
 331         lstrcpynA(lpBuffer,target,nSize);
 332     }
 333     HeapFree(GetProcessHeap(),0,target);
 334     HeapFree(GetProcessHeap(),0,from);
 335     ret = (dwFlags & FORMAT_MESSAGE_ALLOCATE_BUFFER) ? strlen(*(LPSTR*)lpBuffer) : strlen(lpBuffer);
 336 #endif /* __i386__ */
 337     TRACE("-- returning %d\n", ret);
 338     return ret;
 339 }
 340 #undef ADD_TO_T
 341
 342
 343 /***********************************************************************
 344  *           FormatMessageW   (KERNEL32.@)
 345  */
 346 DWORD WINAPI FormatMessageW(
 347         DWORD   dwFlags,
 348         LPCVOID lpSource,
 349         DWORD   dwMessageId,
 350         DWORD   dwLanguageId,
 351         LPWSTR  lpBuffer,
 352         DWORD   nSize,
 353         va_list* _args )
 354 {
 355     LPDWORD args=(LPDWORD)_args;
 356 #if defined(__i386__) || defined(__sparc__)
 357 /* This implementation is completely dependent on the format of the va_list on x86 CPUs */
 358     LPWSTR target,t;
 359     DWORD talloced;
 360     LPWSTR from,f;
 361     DWORD width = dwFlags & FORMAT_MESSAGE_MAX_WIDTH_MASK;
 362     BOOL eos = FALSE;
 363     WCHAR ch;
 364
 365     TRACE("(0x%x,%p,%d,0x%x,%p,%d,%p)\n",
 366           dwFlags,lpSource,dwMessageId,dwLanguageId,lpBuffer,nSize,args);
 367     if ((dwFlags & FORMAT_MESSAGE_FROM_STRING)
 368         &&((dwFlags & FORMAT_MESSAGE_FROM_SYSTEM)
 369            || (dwFlags & FORMAT_MESSAGE_FROM_HMODULE))) return 0;
 370
 371     if (width && width != FORMAT_MESSAGE_MAX_WIDTH_MASK)
 372         FIXME("line wrapping not supported.\n");
 373     from = NULL;
 374     if (dwFlags & FORMAT_MESSAGE_FROM_STRING) {
 375         from = HeapAlloc( GetProcessHeap(), 0, (strlenW((LPCWSTR)lpSource) + 1) *
 376             sizeof(WCHAR) );
 377         strcpyW( from, (LPCWSTR)lpSource );
 378     }
 379     else {
 380         from = NULL;
 381         if (dwFlags & FORMAT_MESSAGE_FROM_HMODULE)
 382             from = load_messageW( (HMODULE)lpSource, dwMessageId, dwLanguageId );
 383         if (!from && (dwFlags & FORMAT_MESSAGE_FROM_SYSTEM))
 384             from = load_messageW( kernel32_handle, dwMessageId, dwLanguageId );
 385
 386         if (!from)
 387         {
 388             SetLastError (ERROR_RESOURCE_LANG_NOT_FOUND);
 389             return 0;
 390         }
 391     }
 392     target = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 100 * sizeof(WCHAR) );
 393     t = target;
 394     talloced= 100;
 395
 396 #define ADD_TO_T(c)  do {\
 397     *t++=c;\
 398     if ((DWORD)(t-target) == talloced) {\
 399         target = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,target,talloced*2*sizeof(WCHAR));\
 400         t = target+talloced;\
 401         talloced*=2;\
 402     } \
 403 } while (0)
 404
 405     if (from) {
 406         f=from;
 407         if (dwFlags & FORMAT_MESSAGE_IGNORE_INSERTS) {
 408             while (*f && !eos)
 409                 ADD_TO_T(*f++);
 410         }
 411         else {
 412             while (*f && !eos) {
 413                 if (*f=='%') {
 414                     int insertnr;
 415                     WCHAR *fmtstr,*sprintfbuf,*x;
 416                     DWORD *argliststart;
 417
 418                     fmtstr = NULL;
 419                     f++;
 420                     if (!*f) {
 421                         ADD_TO_T('%');
 422                         continue;
 423                     }
 424
 425                     switch (*f) {
 426                     case '1':case '2':case '3':case '4':case '5':
 427                     case '6':case '7':case '8':case '9':
 428                         insertnr=*f-'0';
 429                         switch (f[1]) {
 430                         case '0':case '1':case '2':case '3':
 431                         case '4':case '5':case '6':case '7':
 432                         case '8':case '9':
 433                             f++;
 434                             insertnr=insertnr*10+*f-'0';
 435                             f++;
 436                             break;
 437                         default:
 438                             f++;
 439                             break;
 440                         }
 441                         if (*f=='!') {
 442                             f++;
 443                             if (NULL!=(x=strchrW(f,'!'))) {
 444                                 *x='\0';
 445                                 fmtstr=HeapAlloc( GetProcessHeap(), 0,(strlenW(f)+2)*sizeof(WCHAR));
 446                                 sprintfW(fmtstr,PCNTFMTWSTR,f);
 447                                 f=x+1;
 448                             } else {
 449                                 fmtstr=HeapAlloc(GetProcessHeap(),0,(strlenW(f)+2)*sizeof(WCHAR));
 450                                 sprintfW(fmtstr,PCNTFMTWSTR,f);
 451                                 f+=strlenW(f); /*at \0*/
 452                             }
 453                         } else {
 454                             if(!args) break;
 455                             fmtstr = HeapAlloc( GetProcessHeap(),0,3*sizeof(WCHAR));
 456                             strcpyW( fmtstr, FMTWSTR );
 457                         }
 458                         if (dwFlags & FORMAT_MESSAGE_ARGUMENT_ARRAY)
 459                             argliststart=args+insertnr-1;
 460                         else
 461                             argliststart=(*(DWORD**)args)+insertnr-1;
 462
 463                         if (fmtstr[strlenW(fmtstr)-1]=='s' && argliststart[0]) {
 464                             DWORD xarr[3];
 465
 466                             xarr[0]=*(argliststart+0);
 467                             /* possible invalid pointers */
 468                             xarr[1]=*(argliststart+1);
 469                             xarr[2]=*(argliststart+2);
 470                             sprintfbuf=HeapAlloc(GetProcessHeap(),0,(strlenW((LPWSTR)argliststart[0])*2+1)*sizeof(WCHAR));
 471
 472                             /* CMF - This makes a BIG assumption about va_list */
 473                             vsprintfW(sprintfbuf, fmtstr, (va_list) xarr);
 474                         } else {
 475                             sprintfbuf=HeapAlloc(GetProcessHeap(),0,100);
 476
 477                             /* CMF - This makes a BIG assumption about va_list */
 478                             vsprintfW(sprintfbuf, fmtstr, (va_list) argliststart);
 479                         }
 480                         x=sprintfbuf;
 481                         while (*x) {
 482                             ADD_TO_T(*x++);
 483                         }
 484                         HeapFree(GetProcessHeap(),0,sprintfbuf);
 485                         HeapFree(GetProcessHeap(),0,fmtstr);
 486                         break;
 487                     case 'n':
 488                         ADD_TO_T('\r');
 489                         ADD_TO_T('\n');
 490                         f++;
 491                         break;
 492                     case '0':
 493                         eos = TRUE;
 494                         f++;
 495                         break;
 496                     default:
 497                         ADD_TO_T(*f++);
 498                         break;
 499                     }
 500                 } else {
 501                     ch = *f;
 502                     f++;
 503                     if (ch == '\r') {
 504                         if (*f == '\n')
 505                             f++;
 506                         if(width)
 507                             ADD_TO_T(' ');
 508                         else
 509                         {
 510                             ADD_TO_T('\r');
 511                             ADD_TO_T('\n');
 512                         }
 513                     } else {
 514                         if (ch == '\n')
 515                         {
 516                             if(width)
 517                                 ADD_TO_T(' ');
 518                             else
 519                             {
 520                                 ADD_TO_T('\r');
 521                                 ADD_TO_T('\n');
 522                             }
 523                         }
 524                         else
 525                             ADD_TO_T(ch);
 526                     }
 527                 }
 528             }
 529         }
 530         *t='\0';
 531     }
 532     talloced = strlenW(target)+1;
 533     if (nSize && talloced<nSize)
 534         target = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,target,nSize*sizeof(WCHAR));
 535     if (dwFlags & FORMAT_MESSAGE_ALLOCATE_BUFFER) {
 536         /* nSize is the MINIMUM size */
 537         DWORD len = strlenW(target) + 1;
 538         *((LPVOID*)lpBuffer) = (LPVOID)LocalAlloc(LMEM_ZEROINIT,len*sizeof(WCHAR));
 539         strcpyW(*(LPWSTR*)lpBuffer, target);
 540     }
 541     else lstrcpynW(lpBuffer, target, nSize);
 542
 543     HeapFree(GetProcessHeap(),0,target);
 544     HeapFree(GetProcessHeap(),0,from);
 545     TRACE("ret=%s\n", wine_dbgstr_w((dwFlags & FORMAT_MESSAGE_ALLOCATE_BUFFER) ?
 546         *(LPWSTR*)lpBuffer : lpBuffer));
 547     return (dwFlags & FORMAT_MESSAGE_ALLOCATE_BUFFER) ?
 548         strlenW(*(LPWSTR*)lpBuffer):
 549             strlenW(lpBuffer);
 550 #else
 551     return 0;
 552 #endif /* __i386__ */
 553 }
 554 #undef ADD_TO_T