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