programs/regedit/regproc.c

   1 /*
   2  * Registry processing routines. Routines, common for registry
   3  * processing frontends.
   4  *
   5  * Copyright 1999 Sylvain St-Germain
   6  * Copyright 2002 Andriy Palamarchuk
   7  * Copyright 2008 Alexander N. Sørnes <alex@thehandofagony.com>
   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 #include <limits.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <fcntl.h>
  28 #include <io.h>
  29 #include <windows.h>
  30 #include <winnt.h>
  31 #include <winreg.h>
  32 #include <assert.h>
  33 #include <wine/unicode.h>
  34 #include "regproc.h"
  35
  36 #define REG_VAL_BUF_SIZE        4096
  37
  38 /* maximal number of characters in hexadecimal data line,
  39  * including the indentation, but not including the '\' character
  40  */
  41 #define REG_FILE_HEX_LINE_LEN   (2 + 25 * 3)
  42
  43 extern const WCHAR* reg_class_namesW[];
  44
  45 static HKEY reg_class_keys[] = {
  46             HKEY_LOCAL_MACHINE, HKEY_USERS, HKEY_CLASSES_ROOT,
  47             HKEY_CURRENT_CONFIG, HKEY_CURRENT_USER, HKEY_DYN_DATA
  48         };
  49
  50 #define REG_CLASS_NUMBER (sizeof(reg_class_keys) / sizeof(reg_class_keys[0]))
  51
  52 /* return values */
  53 #define NOT_ENOUGH_MEMORY     1
  54 #define IO_ERROR              2
  55
  56 /* processing macros */
  57
  58 /* common check of memory allocation results */
  59 #define CHECK_ENOUGH_MEMORY(p) \
  60 if (!(p)) \
  61 { \
  62     fprintf(stderr,"%s: file %s, line %d: Not enough memory\n", \
  63             getAppName(), __FILE__, __LINE__); \
  64     exit(NOT_ENOUGH_MEMORY); \
  65 }
  66
  67 /******************************************************************************
  68  * Allocates memory and converts input from multibyte to wide chars
  69  * Returned string must be freed by the caller
  70  */
  71 WCHAR* GetWideString(const char* strA)
  72 {
  73     if(strA)
  74     {
  75         WCHAR* strW;
  76         int len = MultiByteToWideChar(CP_ACP, 0, strA, -1, NULL, 0);
  77
  78         strW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
  79         CHECK_ENOUGH_MEMORY(strW);
  80         MultiByteToWideChar(CP_ACP, 0, strA, -1, strW, len);
  81         return strW;
  82     }
  83     return NULL;
  84 }
  85
  86 /******************************************************************************
  87  * Allocates memory and converts input from multibyte to wide chars
  88  * Returned string must be freed by the caller
  89  */
  90 static WCHAR* GetWideStringN(const char* strA, int chars, DWORD *len)
  91 {
  92     if(strA)
  93     {
  94         WCHAR* strW;
  95         *len = MultiByteToWideChar(CP_ACP, 0, strA, chars, NULL, 0);
  96
  97         strW = HeapAlloc(GetProcessHeap(), 0, *len * sizeof(WCHAR));
  98         CHECK_ENOUGH_MEMORY(strW);
  99         MultiByteToWideChar(CP_ACP, 0, strA, chars, strW, *len);
 100         return strW;
 101     }
 102     *len = 0;
 103     return NULL;
 104 }
 105
 106 /******************************************************************************
 107  * Allocates memory and converts input from wide chars to multibyte
 108  * Returned string must be freed by the caller
 109  */
 110 char* GetMultiByteString(const WCHAR* strW)
 111 {
 112     if(strW)
 113     {
 114         char* strA;
 115         int len = WideCharToMultiByte(CP_ACP, 0, strW, -1, NULL, 0, NULL, NULL);
 116
 117         strA = HeapAlloc(GetProcessHeap(), 0, len);
 118         CHECK_ENOUGH_MEMORY(strA);
 119         WideCharToMultiByte(CP_ACP, 0, strW, -1, strA, len, NULL, NULL);
 120         return strA;
 121     }
 122     return NULL;
 123 }
 124
 125 /******************************************************************************
 126  * Allocates memory and converts input from wide chars to multibyte
 127  * Returned string must be freed by the caller
 128  */
 129 static char* GetMultiByteStringN(const WCHAR* strW, int chars, DWORD* len)
 130 {
 131     if(strW)
 132     {
 133         char* strA;
 134         *len = WideCharToMultiByte(CP_ACP, 0, strW, chars, NULL, 0, NULL, NULL);
 135
 136         strA = HeapAlloc(GetProcessHeap(), 0, *len);
 137         CHECK_ENOUGH_MEMORY(strA);
 138         WideCharToMultiByte(CP_ACP, 0, strW, chars, strA, *len, NULL, NULL);
 139         return strA;
 140     }
 141     *len = 0;
 142     return NULL;
 143 }
 144
 145 /******************************************************************************
 146  * Converts a hex representation of a DWORD into a DWORD.
 147  */
 148 static BOOL convertHexToDWord(WCHAR* str, DWORD *dw)
 149 {
 150     char buf[9];
 151     char dummy;
 152
 153     WideCharToMultiByte(CP_ACP, 0, str, -1, buf, 9, NULL, NULL);
 154     if (lstrlenW(str) > 8 || sscanf(buf, "%x%c", dw, &dummy) != 1) {
 155         fprintf(stderr,"%s: ERROR, invalid hex value\n", getAppName());
 156         return FALSE;
 157     }
 158     return TRUE;
 159 }
 160
 161 /******************************************************************************
 162  * Converts a hex comma separated values list into a binary string.
 163  */
 164 static BYTE* convertHexCSVToHex(WCHAR *str, DWORD *size)
 165 {
 166     WCHAR *s;
 167     BYTE *d, *data;
 168
 169     /* The worst case is 1 digit + 1 comma per byte */
 170     *size=(lstrlenW(str)+1)/2;
 171     data=HeapAlloc(GetProcessHeap(), 0, *size);
 172     CHECK_ENOUGH_MEMORY(data);
 173
 174     s = str;
 175     d = data;
 176     *size=0;
 177     while (*s != '\0') {
 178         UINT wc;
 179         WCHAR *end;
 180
 181         wc = strtoulW(s,&end,16);
 182         if (end == s || wc > 0xff || (*end && *end != ',')) {
 183             char* strA = GetMultiByteString(s);
 184             fprintf(stderr,"%s: ERROR converting CSV hex stream. Invalid value at '%s'\n",
 185                     getAppName(), strA);
 186             HeapFree(GetProcessHeap(), 0, data);
 187             HeapFree(GetProcessHeap(), 0, strA);
 188             return NULL;
 189         }
 190         *d++ =(BYTE)wc;
 191         (*size)++;
 192         if (*end) end++;
 193         s = end;
 194     }
 195
 196     return data;
 197 }
 198
 199 /******************************************************************************
 200  * This function returns the HKEY associated with the data type encoded in the
 201  * value.  It modifies the input parameter (key value) in order to skip this
 202  * "now useless" data type information.
 203  *
 204  * Note: Updated based on the algorithm used in 'server/registry.c'
 205  */
 206 static DWORD getDataType(LPWSTR *lpValue, DWORD* parse_type)
 207 {
 208     struct data_type { const WCHAR *tag; int len; int type; int parse_type; };
 209
 210     static const WCHAR quote[] = {'"'};
 211     static const WCHAR str[] = {'s','t','r',':','"'};
 212     static const WCHAR str2[] = {'s','t','r','(','2',')',':','"'};
 213     static const WCHAR hex[] = {'h','e','x',':'};
 214     static const WCHAR dword[] = {'d','w','o','r','d',':'};
 215     static const WCHAR hexp[] = {'h','e','x','('};
 216
 217     static const struct data_type data_types[] = {                   /* actual type */  /* type to assume for parsing */
 218                 { quote,       1,   REG_SZ,              REG_SZ },
 219                 { str,         5,   REG_SZ,              REG_SZ },
 220                 { str2,        8,   REG_EXPAND_SZ,       REG_SZ },
 221                 { hex,         4,   REG_BINARY,          REG_BINARY },
 222                 { dword,       6,   REG_DWORD,           REG_DWORD },
 223                 { hexp,        4,   -1,                  REG_BINARY },
 224                 { NULL,        0,    0,                  0 }
 225             };
 226
 227     const struct data_type *ptr;
 228     int type;
 229
 230     for (ptr = data_types; ptr->tag; ptr++) {
 231         if (strncmpW( ptr->tag, *lpValue, ptr->len ))
 232             continue;
 233
 234         /* Found! */
 235         *parse_type = ptr->parse_type;
 236         type=ptr->type;
 237         *lpValue+=ptr->len;
 238         if (type == -1) {
 239             WCHAR* end;
 240
 241             /* "hex(xx):" is special */
 242             type = (int)strtoulW( *lpValue , &end, 16 );
 243             if (**lpValue=='\0' || *end!=')' || *(end+1)!=':') {
 244                 type=REG_NONE;
 245             } else {
 246                 *lpValue = end + 2;
 247             }
 248         }
 249         return type;
 250     }
 251     *parse_type=REG_NONE;
 252     return REG_NONE;
 253 }
 254
 255 /******************************************************************************
 256  * Replaces escape sequences with the characters.
 257  */
 258 static void REGPROC_unescape_string(WCHAR* str)
 259 {
 260     int str_idx = 0;            /* current character under analysis */
 261     int val_idx = 0;            /* the last character of the unescaped string */
 262     int len = lstrlenW(str);
 263     for (str_idx = 0; str_idx < len; str_idx++, val_idx++) {
 264         if (str[str_idx] == '\\') {
 265             str_idx++;
 266             switch (str[str_idx]) {
 267             case 'n':
 268                 str[val_idx] = '\n';
 269                 break;
 270             case '\\':
 271             case '"':
 272                 str[val_idx] = str[str_idx];
 273                 break;
 274             default:
 275                 fprintf(stderr,"Warning! Unrecognized escape sequence: \\%c'\n",
 276                         str[str_idx]);
 277                 str[val_idx] = str[str_idx];
 278                 break;
 279             }
 280         } else {
 281             str[val_idx] = str[str_idx];
 282         }
 283     }
 284     str[val_idx] = '\0';
 285 }
 286
 287 static BOOL parseKeyName(LPWSTR lpKeyName, HKEY *hKey, LPWSTR *lpKeyPath)
 288 {
 289     WCHAR* lpSlash = NULL;
 290     unsigned int i, len;
 291
 292     if (lpKeyName == NULL)
 293         return FALSE;
 294
 295     for(i = 0; *(lpKeyName+i) != 0; i++)
 296     {
 297         if(*(lpKeyName+i) == '\\')
 298         {
 299             lpSlash = lpKeyName+i;
 300             break;
 301         }
 302     }
 303
 304     if (lpSlash)
 305     {
 306         len = lpSlash-lpKeyName;
 307     }
 308     else
 309     {
 310         len = lstrlenW(lpKeyName);
 311         lpSlash = lpKeyName+len;
 312     }
 313     *hKey = NULL;
 314
 315     for (i = 0; i < REG_CLASS_NUMBER; i++) {
 316         if (CompareStringW(LOCALE_USER_DEFAULT, 0, lpKeyName, len, reg_class_namesW[i], len) == CSTR_EQUAL &&
 317             len == lstrlenW(reg_class_namesW[i])) {
 318             *hKey = reg_class_keys[i];
 319             break;
 320         }
 321     }
 322
 323     if (*hKey == NULL)
 324         return FALSE;
 325
 326
 327     if (*lpSlash != '\0')
 328         lpSlash++;
 329     *lpKeyPath = lpSlash;
 330     return TRUE;
 331 }
 332
 333 /* Globals used by the setValue() & co */
 334 static LPSTR currentKeyName;
 335 static HKEY  currentKeyHandle = NULL;
 336
 337 /******************************************************************************
 338  * Sets the value with name val_name to the data in val_data for the currently
 339  * opened key.
 340  *
 341  * Parameters:
 342  * val_name - name of the registry value
 343  * val_data - registry value data
 344  */
 345 static LONG setValue(WCHAR* val_name, WCHAR* val_data, BOOL is_unicode)
 346 {
 347     LONG res;
 348     DWORD  dwDataType, dwParseType;
 349     LPBYTE lpbData;
 350     DWORD  dwData, dwLen;
 351     WCHAR del[] = {'-',0};
 352
 353     if ( (val_name == NULL) || (val_data == NULL) )
 354         return ERROR_INVALID_PARAMETER;
 355
 356     if (lstrcmpW(val_data, del) == 0)
 357     {
 358         res=RegDeleteValueW(currentKeyHandle,val_name);
 359         return (res == ERROR_FILE_NOT_FOUND ? ERROR_SUCCESS : res);
 360     }
 361
 362     /* Get the data type stored into the value field */
 363     dwDataType = getDataType(&val_data, &dwParseType);
 364
 365     if (dwParseType == REG_SZ)          /* no conversion for string */
 366     {
 367         REGPROC_unescape_string(val_data);
 368         /* Compute dwLen after REGPROC_unescape_string because it may
 369          * have changed the string length and we don't want to store
 370          * the extra garbage in the registry.
 371          */
 372         dwLen = lstrlenW(val_data);
 373         if(val_data[dwLen-1] != '"')
 374             return ERROR_INVALID_DATA;
 375         if (dwLen>0 && val_data[dwLen-1]=='"')
 376         {
 377             dwLen--;
 378             val_data[dwLen]='\0';
 379         }
 380         lpbData = (BYTE*) val_data;
 381         dwLen++;  /* include terminating null */
 382         dwLen = dwLen * sizeof(WCHAR); /* size is in bytes */
 383     }
 384     else if (dwParseType == REG_DWORD)  /* Convert the dword types */
 385     {
 386         if (!convertHexToDWord(val_data, &dwData))
 387             return ERROR_INVALID_DATA;
 388         lpbData = (BYTE*)&dwData;
 389         dwLen = sizeof(dwData);
 390     }
 391     else if (dwParseType == REG_BINARY) /* Convert the binary data */
 392     {
 393         lpbData = convertHexCSVToHex(val_data, &dwLen);
 394         if (!lpbData)
 395             return ERROR_INVALID_DATA;
 396
 397         if((dwDataType == REG_MULTI_SZ || dwDataType == REG_EXPAND_SZ) && !is_unicode)
 398         {
 399             LPBYTE tmp = lpbData;
 400             lpbData = (LPBYTE)GetWideStringN((char*)lpbData, dwLen, &dwLen);
 401             dwLen *= sizeof(WCHAR);
 402             HeapFree(GetProcessHeap(), 0, tmp);
 403         }
 404     }
 405     else                                /* unknown format */
 406     {
 407         fprintf(stderr,"%s: ERROR, unknown data format\n", getAppName());
 408         return ERROR_INVALID_DATA;
 409     }
 410
 411     res = RegSetValueExW(
 412                currentKeyHandle,
 413                val_name,
 414                0,                  /* Reserved */
 415                dwDataType,
 416                lpbData,
 417                dwLen);
 418     if (dwParseType == REG_BINARY)
 419         HeapFree(GetProcessHeap(), 0, lpbData);
 420     return res;
 421 }
 422
 423 /******************************************************************************
 424  * A helper function for processRegEntry() that opens the current key.
 425  * That key must be closed by calling closeKey().
 426  */
 427 static LONG openKeyW(WCHAR* stdInput)
 428 {
 429     HKEY keyClass;
 430     WCHAR* keyPath;
 431     DWORD dwDisp;
 432     LONG res;
 433
 434     /* Sanity checks */
 435     if (stdInput == NULL)
 436         return ERROR_INVALID_PARAMETER;
 437
 438     /* Get the registry class */
 439     if (!parseKeyName(stdInput, &keyClass, &keyPath))
 440         return ERROR_INVALID_PARAMETER;
 441
 442     res = RegCreateKeyExW(
 443                keyClass,                 /* Class     */
 444                keyPath,                  /* Sub Key   */
 445                0,                        /* MUST BE 0 */
 446                NULL,                     /* object type */
 447                REG_OPTION_NON_VOLATILE,  /* option, REG_OPTION_NON_VOLATILE ... */
 448                KEY_ALL_ACCESS,           /* access mask, KEY_ALL_ACCESS */
 449                NULL,                     /* security attribute */
 450                &currentKeyHandle,        /* result */
 451                &dwDisp);                 /* disposition, REG_CREATED_NEW_KEY or
 452                                                         REG_OPENED_EXISTING_KEY */
 453
 454     if (res == ERROR_SUCCESS)
 455         currentKeyName = GetMultiByteString(stdInput);
 456     else
 457         currentKeyHandle = NULL;
 458
 459     return res;
 460
 461 }
 462
 463 /******************************************************************************
 464  * Close the currently opened key.
 465  */
 466 static void closeKey(void)
 467 {
 468     if (currentKeyHandle)
 469     {
 470         HeapFree(GetProcessHeap(), 0, currentKeyName);
 471         RegCloseKey(currentKeyHandle);
 472         currentKeyHandle = NULL;
 473     }
 474 }
 475
 476 /******************************************************************************
 477  * This function is a wrapper for the setValue function.  It prepares the
 478  * land and cleans the area once completed.
 479  * Note: this function modifies the line parameter.
 480  *
 481  * line - registry file unwrapped line. Should have the registry value name and
 482  *      complete registry value data.
 483  */
 484 static void processSetValue(WCHAR* line, BOOL is_unicode)
 485 {
 486     WCHAR* val_name;                   /* registry value name   */
 487     WCHAR* val_data;                   /* registry value data   */
 488     int line_idx = 0;                 /* current character under analysis */
 489     LONG res;
 490
 491     /* get value name */
 492     while ( isspaceW(line[line_idx]) ) line_idx++;
 493     if (line[line_idx] == '@' && line[line_idx + 1] == '=') {
 494         line[line_idx] = '\0';
 495         val_name = line;
 496         line_idx++;
 497     } else if (line[line_idx] == '\"') {
 498         line_idx++;
 499         val_name = line + line_idx;
 500         while (line[line_idx]) {
 501             if (line[line_idx] == '\\')   /* skip escaped character */
 502             {
 503                 line_idx += 2;
 504             } else {
 505                 if (line[line_idx] == '\"') {
 506                     line[line_idx] = '\0';
 507                     line_idx++;
 508                     break;
 509                 } else {
 510                     line_idx++;
 511                 }
 512             }
 513         }
 514         while ( isspaceW(line[line_idx]) ) line_idx++;
 515         if (!line[line_idx]) {
 516             fprintf(stderr, "%s: warning: unexpected EOL\n", getAppName());
 517             return;
 518         }
 519         if (line[line_idx] != '=') {
 520             char* lineA;
 521             line[line_idx] = '\"';
 522             lineA = GetMultiByteString(line);
 523             fprintf(stderr,"%s: warning: unrecognized line: '%s'\n", getAppName(), lineA);
 524             HeapFree(GetProcessHeap(), 0, lineA);
 525             return;
 526         }
 527
 528     } else {
 529         char* lineA = GetMultiByteString(line);
 530         fprintf(stderr,"%s: warning: unrecognized line: '%s'\n", getAppName(), lineA);
 531         HeapFree(GetProcessHeap(), 0, lineA);
 532         return;
 533     }
 534     line_idx++;                   /* skip the '=' character */
 535
 536     while ( isspaceW(line[line_idx]) ) line_idx++;
 537     val_data = line + line_idx;
 538     /* trim trailing blanks */
 539     line_idx = strlenW(val_data);
 540     while (line_idx > 0 && isspaceW(val_data[line_idx-1])) line_idx--;
 541     val_data[line_idx] = '\0';
 542
 543     REGPROC_unescape_string(val_name);
 544     res = setValue(val_name, val_data, is_unicode);
 545     if ( res != ERROR_SUCCESS )
 546     {
 547         char* val_nameA = GetMultiByteString(val_name);
 548         char* val_dataA = GetMultiByteString(val_data);
 549         fprintf(stderr,"%s: ERROR Key %s not created. Value: %s, Data: %s\n",
 550                 getAppName(),
 551                 currentKeyName,
 552                 val_nameA,
 553                 val_dataA);
 554         HeapFree(GetProcessHeap(), 0, val_nameA);
 555         HeapFree(GetProcessHeap(), 0, val_dataA);
 556     }
 557 }
 558
 559 /******************************************************************************
 560  * This function receives the currently read entry and performs the
 561  * corresponding action.
 562  * isUnicode affects parsing of REG_MULTI_SZ values
 563  */
 564 static void processRegEntry(WCHAR* stdInput, BOOL isUnicode)
 565 {
 566     /*
 567      * We encountered the end of the file, make sure we
 568      * close the opened key and exit
 569      */
 570     if (stdInput == NULL) {
 571         closeKey();
 572         return;
 573     }
 574
 575     if      ( stdInput[0] == '[')      /* We are reading a new key */
 576     {
 577         WCHAR* keyEnd;
 578         closeKey();                    /* Close the previous key */
 579
 580         /* Get rid of the square brackets */
 581         stdInput++;
 582         keyEnd = strrchrW(stdInput, ']');
 583         if (keyEnd)
 584             *keyEnd='\0';
 585
 586         /* delete the key if we encounter '-' at the start of reg key */
 587         if ( stdInput[0] == '-')
 588         {
 589             delete_registry_key(stdInput + 1);
 590         } else if ( openKeyW(stdInput) != ERROR_SUCCESS )
 591         {
 592             char* stdInputA = GetMultiByteString(stdInput);
 593             fprintf(stderr,"%s: setValue failed to open key %s\n",
 594                     getAppName(), stdInputA);
 595             HeapFree(GetProcessHeap(), 0, stdInputA);
 596         }
 597     } else if( currentKeyHandle &&
 598                (( stdInput[0] == '@') || /* reading a default @=data pair */
 599                 ( stdInput[0] == '\"'))) /* reading a new value=data pair */
 600     {
 601         processSetValue(stdInput, isUnicode);
 602     } else
 603     {
 604         /* Since we are assuming that the file format is valid we must be
 605          * reading a blank line which indicates the end of this key processing
 606          */
 607         closeKey();
 608     }
 609 }
 610
 611 /******************************************************************************
 612  * Processes a registry file.
 613  * Correctly processes comments (in # form), line continuation.
 614  *
 615  * Parameters:
 616  *   in - input stream to read from
 617  *   first_chars - beginning of stream, read due to Unicode check
 618  */
 619 static void processRegLinesA(FILE *in, char* first_chars)
 620 {
 621     LPSTR line           = NULL;  /* line read from input stream */
 622     ULONG lineSize       = REG_VAL_BUF_SIZE;
 623
 624     line = HeapAlloc(GetProcessHeap(), 0, lineSize);
 625     CHECK_ENOUGH_MEMORY(line);
 626     memcpy(line, first_chars, 2);
 627
 628     while (!feof(in)) {
 629         LPSTR s; /* The pointer into line for where the current fgets should read */
 630         WCHAR* lineW;
 631         s = line;
 632
 633         if(first_chars)
 634         {
 635             s += 2;
 636             first_chars = NULL;
 637         }
 638
 639         for (;;) {
 640             size_t size_remaining;
 641             int size_to_get, i;
 642             char *s_eol; /* various local uses */
 643
 644             /* Do we need to expand the buffer ? */
 645             assert (s >= line && s <= line + lineSize);
 646             size_remaining = lineSize - (s-line);
 647             if (size_remaining < 2) /* room for 1 character and the \0 */
 648             {
 649                 char *new_buffer;
 650                 size_t new_size = lineSize + REG_VAL_BUF_SIZE;
 651                 if (new_size > lineSize) /* no arithmetic overflow */
 652                     new_buffer = HeapReAlloc (GetProcessHeap(), 0, line, new_size);
 653                 else
 654                     new_buffer = NULL;
 655                 CHECK_ENOUGH_MEMORY(new_buffer);
 656                 line = new_buffer;
 657                 s = line + lineSize - size_remaining;
 658                 lineSize = new_size;
 659                 size_remaining = lineSize - (s-line);
 660             }
 661
 662             /* Get as much as possible into the buffer, terminated either by
 663              * eof, error, eol or getting the maximum amount.  Abort on error.
 664              */
 665             size_to_get = (size_remaining > INT_MAX ? INT_MAX : size_remaining);
 666
 667             /* get a single line. note that `i' must be one past the last
 668              * meaningful character in `s' when this loop exits */
 669             for(i = 0; i < size_to_get-1; ++i){
 670                 int xchar;
 671
 672                 xchar = fgetc(in);
 673                 s[i] = xchar;
 674                 if(xchar == EOF){
 675                     if(ferror(in)){
 676                         perror("While reading input");
 677                         exit(IO_ERROR);
 678                     }else
 679                         assert(feof(in));
 680                     break;
 681                 }
 682                 if(s[i] == '\r'){
 683                     /* read the next character iff it's \n */
 684                     if(i+2 >= size_to_get){
 685                         /* buffer too short, so put back the EOL char to
 686                          * read next cycle */
 687                         ungetc('\r', in);
 688                         break;
 689                     }
 690                     s[i+1] = fgetc(in);
 691                     if(s[i+1] != '\n'){
 692                         ungetc(s[i+1], in);
 693                         i = i+1;
 694                     }else
 695                         i = i+2;
 696                     break;
 697                 }
 698                 if(s[i] == '\n'){
 699                     i = i+1;
 700                     break;
 701                 }
 702             }
 703             s[i] = '\0';
 704
 705             /* If we didn't read the eol nor the eof go around for the rest */
 706             s_eol = strpbrk (s, "\r\n");
 707             if (!feof (in) && !s_eol) {
 708                 s = strchr (s, '\0');
 709                 continue;
 710             }
 711
 712             /* If it is a comment line then discard it and go around again */
 713             if (line [0] == '#') {
 714                 s = line;
 715                 continue;
 716             }
 717
 718             /* Remove any line feed.  Leave s_eol on the first \0 */
 719             if (s_eol) {
 720                if (*s_eol == '\r' && *(s_eol+1) == '\n')
 721                    *(s_eol+1) = '\0';
 722                *s_eol = '\0';
 723             } else
 724                 s_eol = strchr (s, '\0');
 725
 726             /* If there is a concatenating \\ then go around again */
 727             if (s_eol > line && *(s_eol-1) == '\\') {
 728                 int c;
 729                 s = s_eol-1;
 730
 731                 do
 732                 {
 733                     c = fgetc(in);
 734                 } while(c == ' ' || c == '\t');
 735
 736                 if(c == EOF)
 737                 {
 738                     fprintf(stderr,"%s: ERROR - invalid continuation.\n",
 739                             getAppName());
 740                 }
 741                 else
 742                 {
 743                     *s = c;
 744                     s++;
 745                 }
 746                 continue;
 747             }
 748
 749             lineW = GetWideString(line);
 750
 751             break; /* That is the full virtual line */
 752         }
 753
 754         processRegEntry(lineW, FALSE);
 755         HeapFree(GetProcessHeap(), 0, lineW);
 756     }
 757     processRegEntry(NULL, FALSE);
 758
 759     HeapFree(GetProcessHeap(), 0, line);
 760 }
 761
 762 static void processRegLinesW(FILE *in)
 763 {
 764     WCHAR* buf           = NULL;  /* line read from input stream */
 765     ULONG lineSize       = REG_VAL_BUF_SIZE;
 766     size_t CharsInBuf = -1;
 767
 768     WCHAR* s; /* The pointer into buf for where the current fgets should read */
 769     WCHAR* line; /* The start of the current line */
 770
 771     buf = HeapAlloc(GetProcessHeap(), 0, lineSize * sizeof(WCHAR));
 772     CHECK_ENOUGH_MEMORY(buf);
 773
 774     s = buf;
 775     line = buf;
 776
 777     while(!feof(in)) {
 778         size_t size_remaining;
 779         int size_to_get;
 780         WCHAR *s_eol = NULL; /* various local uses */
 781
 782         /* Do we need to expand the buffer ? */
 783         assert (s >= buf && s <= buf + lineSize);
 784         size_remaining = lineSize - (s-buf);
 785         if (size_remaining < 2) /* room for 1 character and the \0 */
 786         {
 787             WCHAR *new_buffer;
 788             size_t new_size = lineSize + (REG_VAL_BUF_SIZE / sizeof(WCHAR));
 789             if (new_size > lineSize) /* no arithmetic overflow */
 790                 new_buffer = HeapReAlloc (GetProcessHeap(), 0, buf, new_size * sizeof(WCHAR));
 791             else
 792                 new_buffer = NULL;
 793             CHECK_ENOUGH_MEMORY(new_buffer);
 794             buf = new_buffer;
 795             line = buf;
 796             s = buf + lineSize - size_remaining;
 797             lineSize = new_size;
 798             size_remaining = lineSize - (s-buf);
 799         }
 800
 801         /* Get as much as possible into the buffer, terminated either by
 802         * eof, error or getting the maximum amount.  Abort on error.
 803         */
 804         size_to_get = (size_remaining > INT_MAX ? INT_MAX : size_remaining);
 805
 806         CharsInBuf = fread(s, sizeof(WCHAR), size_to_get - 1, in);
 807         s[CharsInBuf] = 0;
 808
 809         if (CharsInBuf == 0) {
 810             if (ferror(in)) {
 811                 perror ("While reading input");
 812                 exit (IO_ERROR);
 813             } else {
 814                 assert (feof(in));
 815                 *s = '\0';
 816                 /* It is not clear to me from the definition that the
 817                 * contents of the buffer are well defined on detecting
 818                 * an eof without managing to read anything.
 819                 */
 820             }
 821         }
 822
 823         /* If we didn't read the eol nor the eof go around for the rest */
 824         while(1)
 825         {
 826             const WCHAR line_endings[] = {'\r','\n',0};
 827             s_eol = strpbrkW(line, line_endings);
 828
 829             if(!s_eol) {
 830                 /* Move the stub of the line to the start of the buffer so
 831                  * we get the maximum space to read into, and so we don't
 832                  * have to recalculate 'line' if the buffer expands */
 833                 MoveMemory(buf, line, (strlenW(line)+1) * sizeof(WCHAR));
 834                 line = buf;
 835                 s = strchrW(line, '\0');
 836                 break;
 837             }
 838
 839             /* If it is a comment line then discard it and go around again */
 840             if (*line == '#') {
 841                 if (*s_eol == '\r' && *(s_eol+1) == '\n')
 842                     line = s_eol + 2;
 843                 else
 844                     line = s_eol + 1;
 845                 continue;
 846             }
 847
 848             /* If there is a concatenating \\ then go around again */
 849             if (*(s_eol-1) == '\\') {
 850                 WCHAR* NextLine = s_eol + 1;
 851
 852                 if(*s_eol == '\r' && *(s_eol+1) == '\n')
 853                     NextLine++;
 854
 855                 while(*(NextLine+1) == ' ' || *(NextLine+1) == '\t')
 856                     NextLine++;
 857
 858                 MoveMemory(s_eol - 1, NextLine, (CharsInBuf - (NextLine - s) + 1)*sizeof(WCHAR));
 859                 CharsInBuf -= NextLine - s_eol + 1;
 860                 s_eol = 0;
 861                 continue;
 862             }
 863
 864             /* Remove any line feed.  Leave s_eol on the last \0 */
 865             if (*s_eol == '\r' && *(s_eol + 1) == '\n')
 866                 *s_eol++ = '\0';
 867             *s_eol = '\0';
 868
 869             processRegEntry(line, TRUE);
 870             line = s_eol + 1;
 871             s_eol = 0;
 872             continue; /* That is the full virtual line */
 873         }
 874     }
 875
 876     processRegEntry(NULL, TRUE);
 877
 878     HeapFree(GetProcessHeap(), 0, buf);
 879 }
 880
 881 /****************************************************************************
 882  * REGPROC_print_error
 883  *
 884  * Print the message for GetLastError
 885  */
 886
 887 static void REGPROC_print_error(void)
 888 {
 889     LPVOID lpMsgBuf;
 890     DWORD error_code;
 891     int status;
 892
 893     error_code = GetLastError ();
 894     status = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
 895                             NULL, error_code, 0, (LPSTR) &lpMsgBuf, 0, NULL);
 896     if (!status) {
 897         fprintf(stderr,"%s: Cannot display message for error %d, status %d\n",
 898                 getAppName(), error_code, GetLastError());
 899         exit(1);
 900     }
 901     puts(lpMsgBuf);
 902     LocalFree(lpMsgBuf);
 903     exit(1);
 904 }
 905
 906 /******************************************************************************
 907  * Checks whether the buffer has enough room for the string or required size.
 908  * Resizes the buffer if necessary.
 909  *
 910  * Parameters:
 911  * buffer - pointer to a buffer for string
 912  * len - current length of the buffer in characters.
 913  * required_len - length of the string to place to the buffer in characters.
 914  *   The length does not include the terminating null character.
 915  */
 916 static void REGPROC_resize_char_buffer(WCHAR **buffer, DWORD *len, DWORD required_len)
 917 {
 918     required_len++;
 919     if (required_len > *len) {
 920         *len = required_len;
 921         if (!*buffer)
 922             *buffer = HeapAlloc(GetProcessHeap(), 0, *len * sizeof(**buffer));
 923         else
 924             *buffer = HeapReAlloc(GetProcessHeap(), 0, *buffer, *len * sizeof(**buffer));
 925         CHECK_ENOUGH_MEMORY(*buffer);
 926     }
 927 }
 928
 929 /******************************************************************************
 930  * Same as REGPROC_resize_char_buffer() but on a regular buffer.
 931  *
 932  * Parameters:
 933  * buffer - pointer to a buffer
 934  * len - current size of the buffer in bytes
 935  * required_size - size of the data to place in the buffer in bytes
 936  */
 937 static void REGPROC_resize_binary_buffer(BYTE **buffer, DWORD *size, DWORD required_size)
 938 {
 939     if (required_size > *size) {
 940         *size = required_size;
 941         if (!*buffer)
 942             *buffer = HeapAlloc(GetProcessHeap(), 0, *size);
 943         else
 944             *buffer = HeapReAlloc(GetProcessHeap(), 0, *buffer, *size);
 945         CHECK_ENOUGH_MEMORY(*buffer);
 946     }
 947 }
 948
 949 /******************************************************************************
 950  * Prints string str to file
 951  */
 952 static void REGPROC_export_string(WCHAR **line_buf, DWORD *line_buf_size, DWORD *line_len, WCHAR *str, DWORD str_len)
 953 {
 954     DWORD i, pos;
 955     DWORD extra = 0;
 956
 957     REGPROC_resize_char_buffer(line_buf, line_buf_size, *line_len + str_len + 10);
 958
 959     /* escaping characters */
 960     pos = *line_len;
 961     for (i = 0; i < str_len; i++) {
 962         WCHAR c = str[i];
 963         switch (c) {
 964         case '\n':
 965             extra++;
 966             REGPROC_resize_char_buffer(line_buf, line_buf_size, *line_len + str_len + extra);
 967             (*line_buf)[pos++] = '\\';
 968             (*line_buf)[pos++] = 'n';
 969             break;
 970
 971         case '\\':
 972         case '"':
 973             extra++;
 974             REGPROC_resize_char_buffer(line_buf, line_buf_size, *line_len + str_len + extra);
 975             (*line_buf)[pos++] = '\\';
 976             /* Fall through */
 977
 978         default:
 979             (*line_buf)[pos++] = c;
 980             break;
 981         }
 982     }
 983     (*line_buf)[pos] = '\0';
 984     *line_len = pos;
 985 }
 986
 987 static void REGPROC_export_binary(WCHAR **line_buf, DWORD *line_buf_size, DWORD *line_len, DWORD type, BYTE *value, DWORD value_size, BOOL unicode)
 988 {
 989     DWORD hex_pos, data_pos;
 990     const WCHAR *hex_prefix;
 991     const WCHAR hex[] = {'h','e','x',':',0};
 992     WCHAR hex_buf[17];
 993     const WCHAR concat[] = {'\\','\r','\n',' ',' ',0};
 994     DWORD concat_prefix, concat_len;
 995     const WCHAR newline[] = {'\r','\n',0};
 996     CHAR* value_multibyte = NULL;
 997
 998     if (type == REG_BINARY) {
 999         hex_prefix = hex;
1000     } else {
1001         const WCHAR hex_format[] = {'h','e','x','(','%','u',')',':',0};
1002         hex_prefix = hex_buf;
1003         sprintfW(hex_buf, hex_format, type);
1004         if ((type == REG_SZ || type == REG_EXPAND_SZ || type == REG_MULTI_SZ) && !unicode)
1005         {
1006             value_multibyte = GetMultiByteStringN((WCHAR*)value, value_size / sizeof(WCHAR), &value_size);
1007             value = (BYTE*)value_multibyte;
1008         }
1009     }
1010
1011     concat_len = lstrlenW(concat);
1012     concat_prefix = 2;
1013
1014     hex_pos = *line_len;
1015     *line_len += lstrlenW(hex_prefix);
1016     data_pos = *line_len;
1017     *line_len += value_size * 3;
1018     /* - The 2 spaces that concat places at the start of the
1019      *   line effectively reduce the space available for data.
1020      * - If the value name and hex prefix are very long
1021      *   ( > REG_FILE_HEX_LINE_LEN) then we may overestimate
1022      *   the needed number of lines by one. But that's ok.
1023      * - The trailing linefeed takes the place of a comma so
1024      *   it's accounted for already.
1025      */
1026     *line_len += *line_len / (REG_FILE_HEX_LINE_LEN - concat_prefix) * concat_len;
1027     REGPROC_resize_char_buffer(line_buf, line_buf_size, *line_len);
1028     lstrcpyW(*line_buf + hex_pos, hex_prefix);
1029     if (value_size)
1030     {
1031         const WCHAR format[] = {'%','0','2','x',0};
1032         DWORD i, column;
1033
1034         column = data_pos; /* no line wrap yet */
1035         i = 0;
1036         while (1)
1037         {
1038             sprintfW(*line_buf + data_pos, format, (unsigned int)value[i]);
1039             data_pos += 2;
1040             if (++i == value_size)
1041                 break;
1042
1043             (*line_buf)[data_pos++] = ',';
1044             column += 3;
1045
1046             /* wrap the line */
1047             if (column >= REG_FILE_HEX_LINE_LEN) {
1048                 lstrcpyW(*line_buf + data_pos, concat);
1049                 data_pos += concat_len;
1050                 column = concat_prefix;
1051             }
1052         }
1053     }
1054     lstrcpyW(*line_buf + data_pos, newline);
1055     HeapFree(GetProcessHeap(), 0, value_multibyte);
1056 }
1057
1058 /******************************************************************************
1059  * Writes the given line to a file, in multi-byte or wide characters
1060  */
1061 static void REGPROC_write_line(FILE *file, const WCHAR* str, BOOL unicode)
1062 {
1063     if(unicode)
1064     {
1065         fwrite(str, sizeof(WCHAR), lstrlenW(str), file);
1066     } else
1067     {
1068         char* strA = GetMultiByteString(str);
1069         fputs(strA, file);
1070         HeapFree(GetProcessHeap(), 0, strA);
1071     }
1072 }
1073
1074 /******************************************************************************
1075  * Writes contents of the registry key to the specified file stream.
1076  *
1077  * Parameters:
1078  * file - writable file stream to export registry branch to.
1079  * key - registry branch to export.
1080  * reg_key_name_buf - name of the key with registry class.
1081  *      Is resized if necessary.
1082  * reg_key_name_size - length of the buffer for the registry class in characters.
1083  * val_name_buf - buffer for storing value name.
1084  *      Is resized if necessary.
1085  * val_name_size - length of the buffer for storing value names in characters.
1086  * val_buf - buffer for storing values while extracting.
1087  *      Is resized if necessary.
1088  * val_size - size of the buffer for storing values in bytes.
1089  */
1090 static void export_hkey(FILE *file, HKEY key,
1091                  WCHAR **reg_key_name_buf, DWORD *reg_key_name_size,
1092                  WCHAR **val_name_buf, DWORD *val_name_size,
1093                  BYTE **val_buf, DWORD *val_size,
1094                  WCHAR **line_buf, DWORD *line_buf_size,
1095                  BOOL unicode)
1096 {
1097     DWORD max_sub_key_len;
1098     DWORD max_val_name_len;
1099     DWORD max_val_size;
1100     DWORD curr_len;
1101     DWORD i;
1102     BOOL more_data;
1103     LONG ret;
1104     WCHAR key_format[] = {'\r','\n','[','%','s',']','\r','\n',0};
1105
1106     /* get size information and resize the buffers if necessary */
1107     if (RegQueryInfoKeyW(key, NULL, NULL, NULL, NULL,
1108                         &max_sub_key_len, NULL,
1109                         NULL, &max_val_name_len, &max_val_size, NULL, NULL
1110                        ) != ERROR_SUCCESS) {
1111         REGPROC_print_error();
1112     }
1113     curr_len = strlenW(*reg_key_name_buf);
1114     REGPROC_resize_char_buffer(reg_key_name_buf, reg_key_name_size,
1115                                max_sub_key_len + curr_len + 1);
1116     REGPROC_resize_char_buffer(val_name_buf, val_name_size,
1117                                max_val_name_len);
1118     REGPROC_resize_binary_buffer(val_buf, val_size, max_val_size);
1119     REGPROC_resize_char_buffer(line_buf, line_buf_size, lstrlenW(*reg_key_name_buf) + 4);
1120     /* output data for the current key */
1121     sprintfW(*line_buf, key_format, *reg_key_name_buf);
1122     REGPROC_write_line(file, *line_buf, unicode);
1123
1124     /* print all the values */
1125     i = 0;
1126     more_data = TRUE;
1127     while(more_data) {
1128         DWORD value_type;
1129         DWORD val_name_size1 = *val_name_size;
1130         DWORD val_size1 = *val_size;
1131         ret = RegEnumValueW(key, i, *val_name_buf, &val_name_size1, NULL,
1132                            &value_type, *val_buf, &val_size1);
1133         if (ret == ERROR_MORE_DATA) {
1134             /* Increase the size of the buffers and retry */
1135             REGPROC_resize_char_buffer(val_name_buf, val_name_size, val_name_size1);
1136             REGPROC_resize_binary_buffer(val_buf, val_size, val_size1);
1137         } else if (ret != ERROR_SUCCESS) {
1138             more_data = FALSE;
1139             if (ret != ERROR_NO_MORE_ITEMS) {
1140                 REGPROC_print_error();
1141             }
1142         } else {
1143             DWORD line_len;
1144             i++;
1145
1146             if ((*val_name_buf)[0]) {
1147                 const WCHAR val_start[] = {'"','%','s','"','=',0};
1148
1149                 line_len = 0;
1150                 REGPROC_export_string(line_buf, line_buf_size, &line_len, *val_name_buf, lstrlenW(*val_name_buf));
1151                 REGPROC_resize_char_buffer(val_name_buf, val_name_size, lstrlenW(*line_buf) + 1);
1152                 lstrcpyW(*val_name_buf, *line_buf);
1153
1154                 line_len = 3 + lstrlenW(*val_name_buf);
1155                 REGPROC_resize_char_buffer(line_buf, line_buf_size, line_len);
1156                 sprintfW(*line_buf, val_start, *val_name_buf);
1157             } else {
1158                 const WCHAR std_val[] = {'@','=',0};
1159                 line_len = 2;
1160                 REGPROC_resize_char_buffer(line_buf, line_buf_size, line_len);
1161                 lstrcpyW(*line_buf, std_val);
1162             }
1163
1164             switch (value_type) {
1165             case REG_SZ:
1166             {
1167                 WCHAR* wstr = (WCHAR*)*val_buf;
1168
1169                 if (val_size1 < sizeof(WCHAR) || val_size1 % sizeof(WCHAR) ||
1170                     wstr[val_size1 / sizeof(WCHAR) - 1]) {
1171                     REGPROC_export_binary(line_buf, line_buf_size, &line_len, value_type, *val_buf, val_size1, unicode);
1172                 } else {
1173                     const WCHAR start[] = {'"',0};
1174                     const WCHAR end[] = {'"','\r','\n',0};
1175                     DWORD len;
1176
1177                     len = lstrlenW(start);
1178                     REGPROC_resize_char_buffer(line_buf, line_buf_size, line_len + len);
1179                     lstrcpyW(*line_buf + line_len, start);
1180                     line_len += len;
1181
1182                     /* At this point we know wstr is '\0'-terminated
1183                      * so we can subtract 1 from the size
1184                      */
1185                     REGPROC_export_string(line_buf, line_buf_size, &line_len, wstr, val_size1 / sizeof(WCHAR) - 1);
1186
1187                     REGPROC_resize_char_buffer(line_buf, line_buf_size, line_len + lstrlenW(end));
1188                     lstrcpyW(*line_buf + line_len, end);
1189                 }
1190                 break;
1191             }
1192
1193             case REG_DWORD:
1194             {
1195                 WCHAR format[] = {'d','w','o','r','d',':','%','0','8','x','\r','\n',0};
1196
1197                 REGPROC_resize_char_buffer(line_buf, line_buf_size, line_len + 15);
1198                 sprintfW(*line_buf + line_len, format, *((DWORD *)*val_buf));
1199                 break;
1200             }
1201
1202             default:
1203             {
1204                 char* key_nameA = GetMultiByteString(*reg_key_name_buf);
1205                 char* value_nameA = GetMultiByteString(*val_name_buf);
1206                 fprintf(stderr,"%s: warning - unsupported registry format '%d', "
1207                         "treat as binary\n",
1208                         getAppName(), value_type);
1209                 fprintf(stderr,"key name: \"%s\"\n", key_nameA);
1210                 fprintf(stderr,"value name:\"%s\"\n\n", value_nameA);
1211                 HeapFree(GetProcessHeap(), 0, key_nameA);
1212                 HeapFree(GetProcessHeap(), 0, value_nameA);
1213             }
1214                 /* falls through */
1215             case REG_EXPAND_SZ:
1216             case REG_MULTI_SZ:
1217                 /* falls through */
1218             case REG_BINARY:
1219                 REGPROC_export_binary(line_buf, line_buf_size, &line_len, value_type, *val_buf, val_size1, unicode);
1220             }
1221             REGPROC_write_line(file, *line_buf, unicode);
1222         }
1223     }
1224
1225     i = 0;
1226     more_data = TRUE;
1227     (*reg_key_name_buf)[curr_len] = '\\';
1228     while(more_data) {
1229         DWORD buf_size = *reg_key_name_size - curr_len - 1;
1230
1231         ret = RegEnumKeyExW(key, i, *reg_key_name_buf + curr_len + 1, &buf_size,
1232                            NULL, NULL, NULL, NULL);
1233         if (ret == ERROR_MORE_DATA) {
1234             /* Increase the size of the buffer and retry */
1235             REGPROC_resize_char_buffer(reg_key_name_buf, reg_key_name_size, curr_len + 1 + buf_size);
1236         } else if (ret != ERROR_SUCCESS) {
1237             more_data = FALSE;
1238             if (ret != ERROR_NO_MORE_ITEMS) {
1239                 REGPROC_print_error();
1240             }
1241         } else {
1242             HKEY subkey;
1243
1244             i++;
1245             if (RegOpenKeyW(key, *reg_key_name_buf + curr_len + 1,
1246                            &subkey) == ERROR_SUCCESS) {
1247                 export_hkey(file, subkey, reg_key_name_buf, reg_key_name_size,
1248                             val_name_buf, val_name_size, val_buf, val_size,
1249                             line_buf, line_buf_size, unicode);
1250                 RegCloseKey(subkey);
1251             } else {
1252                 REGPROC_print_error();
1253             }
1254         }
1255     }
1256     (*reg_key_name_buf)[curr_len] = '\0';
1257 }
1258
1259 /******************************************************************************
1260  * Open file in binary mode for export.
1261  */
1262 static FILE *REGPROC_open_export_file(WCHAR *file_name, BOOL unicode)
1263 {
1264     FILE *file;
1265     WCHAR dash = '-';
1266
1267     if (strncmpW(file_name,&dash,1)==0) {
1268         file=stdout;
1269         _setmode(_fileno(file), _O_BINARY);
1270     } else
1271     {
1272         CHAR* file_nameA = GetMultiByteString(file_name);
1273         file = fopen(file_nameA, "wb");
1274         if (!file) {
1275             perror("");
1276             fprintf(stderr,"%s: Can't open file \"%s\"\n", getAppName(), file_nameA);
1277             HeapFree(GetProcessHeap(), 0, file_nameA);
1278             exit(1);
1279         }
1280         HeapFree(GetProcessHeap(), 0, file_nameA);
1281     }
1282     if(unicode)
1283     {
1284         const BYTE unicode_seq[] = {0xff,0xfe};
1285         const WCHAR header[] = {'W','i','n','d','o','w','s',' ','R','e','g','i','s','t','r','y',' ','E','d','i','t','o','r',' ','V','e','r','s','i','o','n',' ','5','.','0','0','\r','\n'};
1286         fwrite(unicode_seq, sizeof(BYTE), sizeof(unicode_seq)/sizeof(unicode_seq[0]), file);
1287         fwrite(header, sizeof(WCHAR), sizeof(header)/sizeof(header[0]), file);
1288     } else
1289     {
1290         fputs("REGEDIT4\r\n", file);
1291     }
1292
1293     return file;
1294 }
1295
1296 /******************************************************************************
1297  * Writes contents of the registry key to the specified file stream.
1298  *
1299  * Parameters:
1300  * file_name - name of a file to export registry branch to.
1301  * reg_key_name - registry branch to export. The whole registry is exported if
1302  *      reg_key_name is NULL or contains an empty string.
1303  */
1304 BOOL export_registry_key(WCHAR *file_name, WCHAR *reg_key_name, DWORD format)
1305 {
1306     WCHAR *reg_key_name_buf;
1307     WCHAR *val_name_buf;
1308     BYTE *val_buf;
1309     WCHAR *line_buf;
1310     DWORD reg_key_name_size = KEY_MAX_LEN;
1311     DWORD val_name_size = KEY_MAX_LEN;
1312     DWORD val_size = REG_VAL_BUF_SIZE;
1313     DWORD line_buf_size = KEY_MAX_LEN + REG_VAL_BUF_SIZE;
1314     FILE *file = NULL;
1315     BOOL unicode = (format == REG_FORMAT_5);
1316
1317     reg_key_name_buf = HeapAlloc(GetProcessHeap(), 0,
1318                                  reg_key_name_size  * sizeof(*reg_key_name_buf));
1319     val_name_buf = HeapAlloc(GetProcessHeap(), 0,
1320                              val_name_size * sizeof(*val_name_buf));
1321     val_buf = HeapAlloc(GetProcessHeap(), 0, val_size);
1322     line_buf = HeapAlloc(GetProcessHeap(), 0, line_buf_size * sizeof(*line_buf));
1323     CHECK_ENOUGH_MEMORY(reg_key_name_buf && val_name_buf && val_buf && line_buf);
1324
1325     if (reg_key_name && reg_key_name[0]) {
1326         HKEY reg_key_class;
1327         WCHAR *branch_name = NULL;
1328         HKEY key;
1329
1330         REGPROC_resize_char_buffer(&reg_key_name_buf, &reg_key_name_size,
1331                                    lstrlenW(reg_key_name));
1332         lstrcpyW(reg_key_name_buf, reg_key_name);
1333
1334         /* open the specified key */
1335         if (!parseKeyName(reg_key_name, &reg_key_class, &branch_name)) {
1336             CHAR* key_nameA = GetMultiByteString(reg_key_name);
1337             fprintf(stderr,"%s: Incorrect registry class specification in '%s'\n",
1338                     getAppName(), key_nameA);
1339             HeapFree(GetProcessHeap(), 0, key_nameA);
1340             exit(1);
1341         }
1342         if (!branch_name[0]) {
1343             /* no branch - registry class is specified */
1344             file = REGPROC_open_export_file(file_name, unicode);
1345             export_hkey(file, reg_key_class,
1346                         &reg_key_name_buf, &reg_key_name_size,
1347                         &val_name_buf, &val_name_size,
1348                         &val_buf, &val_size, &line_buf,
1349                         &line_buf_size, unicode);
1350         } else if (RegOpenKeyW(reg_key_class, branch_name, &key) == ERROR_SUCCESS) {
1351             file = REGPROC_open_export_file(file_name, unicode);
1352             export_hkey(file, key,
1353                         &reg_key_name_buf, &reg_key_name_size,
1354                         &val_name_buf, &val_name_size,
1355                         &val_buf, &val_size, &line_buf,
1356                         &line_buf_size, unicode);
1357             RegCloseKey(key);
1358         } else {
1359             CHAR* key_nameA = GetMultiByteString(reg_key_name);
1360             fprintf(stderr,"%s: Can't export. Registry key '%s' does not exist!\n",
1361                     getAppName(), key_nameA);
1362             HeapFree(GetProcessHeap(), 0, key_nameA);
1363             REGPROC_print_error();
1364         }
1365     } else {
1366         unsigned int i;
1367
1368         /* export all registry classes */
1369         file = REGPROC_open_export_file(file_name, unicode);
1370         for (i = 0; i < REG_CLASS_NUMBER; i++) {
1371             /* do not export HKEY_CLASSES_ROOT */
1372             if (reg_class_keys[i] != HKEY_CLASSES_ROOT &&
1373                     reg_class_keys[i] != HKEY_CURRENT_USER &&
1374                     reg_class_keys[i] != HKEY_CURRENT_CONFIG &&
1375                     reg_class_keys[i] != HKEY_DYN_DATA) {
1376                 lstrcpyW(reg_key_name_buf, reg_class_namesW[i]);
1377                 export_hkey(file, reg_class_keys[i],
1378                             &reg_key_name_buf, &reg_key_name_size,
1379                             &val_name_buf, &val_name_size,
1380                             &val_buf, &val_size, &line_buf,
1381                             &line_buf_size, unicode);
1382             }
1383         }
1384     }
1385
1386     if (file) {
1387         fclose(file);
1388     }
1389     HeapFree(GetProcessHeap(), 0, reg_key_name);
1390     HeapFree(GetProcessHeap(), 0, val_name_buf);
1391     HeapFree(GetProcessHeap(), 0, val_buf);
1392     HeapFree(GetProcessHeap(), 0, line_buf);
1393     return TRUE;
1394 }
1395
1396 /******************************************************************************
1397  * Reads contents of the specified file into the registry.
1398  */
1399 BOOL import_registry_file(FILE* reg_file)
1400 {
1401     if (reg_file)
1402     {
1403         BYTE s[2];
1404         if (fread( s, 2, 1, reg_file) == 1)
1405         {
1406             if (s[0] == 0xff && s[1] == 0xfe)
1407             {
1408                 processRegLinesW(reg_file);
1409             } else
1410             {
1411                 processRegLinesA(reg_file, (char*)s);
1412             }
1413         }
1414         return TRUE;
1415     }
1416     return FALSE;
1417 }
1418
1419 /******************************************************************************
1420  * Removes the registry key with all subkeys. Parses full key name.
1421  *
1422  * Parameters:
1423  * reg_key_name - full name of registry branch to delete. Ignored if is NULL,
1424  *      empty, points to register key class, does not exist.
1425  */
1426 void delete_registry_key(WCHAR *reg_key_name)
1427 {
1428     WCHAR *key_name = NULL;
1429     HKEY key_class;
1430
1431     if (!reg_key_name || !reg_key_name[0])
1432         return;
1433
1434     if (!parseKeyName(reg_key_name, &key_class, &key_name)) {
1435         char* reg_key_nameA = GetMultiByteString(reg_key_name);
1436         fprintf(stderr,"%s: Incorrect registry class specification in '%s'\n",
1437                 getAppName(), reg_key_nameA);
1438         HeapFree(GetProcessHeap(), 0, reg_key_nameA);
1439         exit(1);
1440     }
1441     if (!*key_name) {
1442         char* reg_key_nameA = GetMultiByteString(reg_key_name);
1443         fprintf(stderr,"%s: Can't delete registry class '%s'\n",
1444                 getAppName(), reg_key_nameA);
1445         HeapFree(GetProcessHeap(), 0, reg_key_nameA);
1446         exit(1);
1447     }
1448
1449     RegDeleteTreeW(key_class, key_name);
1450 }