base/applications/cmdutils/reg/import.c

   1 /*
   2  * Copyright 2017 Hugh McMaster
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <windows.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 #include <wine/debug.h>
  25 #include <wine/heap.h>
  26
  27 #include "reg.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(reg);
  30
  31 static WCHAR *GetWideString(const char *strA)
  32 {
  33     if (strA)
  34     {
  35         WCHAR *strW;
  36         int len = MultiByteToWideChar(CP_ACP, 0, strA, -1, NULL, 0);
  37
  38         strW = heap_xalloc(len * sizeof(WCHAR));
  39         MultiByteToWideChar(CP_ACP, 0, strA, -1, strW, len);
  40         return strW;
  41     }
  42     return NULL;
  43 }
  44
  45 static WCHAR *GetWideStringN(const char *strA, int size, DWORD *len)
  46 {
  47     if (strA)
  48     {
  49         WCHAR *strW;
  50         *len = MultiByteToWideChar(CP_ACP, 0, strA, size, NULL, 0);
  51
  52         strW = heap_xalloc(*len * sizeof(WCHAR));
  53         MultiByteToWideChar(CP_ACP, 0, strA, size, strW, *len);
  54         return strW;
  55     }
  56     *len = 0;
  57     return NULL;
  58 }
  59
  60 static WCHAR *(*get_line)(FILE *);
  61
  62 /* parser definitions */
  63 enum parser_state
  64 {
  65     HEADER,              /* parsing the registry file version header */
  66     PARSE_WIN31_LINE,    /* parsing a Windows 3.1 registry line */
  67     LINE_START,          /* at the beginning of a registry line */
  68     KEY_NAME,            /* parsing a key name */
  69     DELETE_KEY,          /* deleting a registry key */
  70     DEFAULT_VALUE_NAME,  /* parsing a default value name */
  71     QUOTED_VALUE_NAME,   /* parsing a double-quoted value name */
  72     DATA_START,          /* preparing for data parsing operations */
  73     DELETE_VALUE,        /* deleting a registry value */
  74     DATA_TYPE,           /* parsing the registry data type */
  75     STRING_DATA,         /* parsing REG_SZ data */
  76     DWORD_DATA,          /* parsing DWORD data */
  77     HEX_DATA,            /* parsing REG_BINARY, REG_NONE, REG_EXPAND_SZ or REG_MULTI_SZ data */
  78     EOL_BACKSLASH,       /* preparing to parse multiple lines of hex data */
  79     HEX_MULTILINE,       /* parsing multiple lines of hex data */
  80     UNKNOWN_DATA,        /* parsing an unhandled or invalid data type */
  81     SET_VALUE,           /* adding a value to the registry */
  82     NB_PARSER_STATES
  83 };
  84
  85 struct parser
  86 {
  87     FILE              *file;           /* pointer to a registry file */
  88     WCHAR              two_wchars[2];  /* first two characters from the encoding check */
  89     BOOL               is_unicode;     /* parsing Unicode or ASCII data */
  90     short int          reg_version;    /* registry file version */
  91     HKEY               hkey;           /* current registry key */
  92     WCHAR             *key_name;       /* current key name */
  93     WCHAR             *value_name;     /* value name */
  94     DWORD              parse_type;     /* generic data type for parsing */
  95     DWORD              data_type;      /* data type */
  96     void              *data;           /* value data */
  97     DWORD              data_size;      /* size of the data (in bytes) */
  98     BOOL               backslash;      /* TRUE if the current line contains a backslash */
  99     enum parser_state  state;          /* current parser state */
 100 };
 101
 102 typedef WCHAR *(*parser_state_func)(struct parser *parser, WCHAR *pos);
 103
 104 /* parser state machine functions */
 105 static WCHAR *header_state(struct parser *parser, WCHAR *pos);
 106 static WCHAR *parse_win31_line_state(struct parser *parser, WCHAR *pos);
 107 static WCHAR *line_start_state(struct parser *parser, WCHAR *pos);
 108 static WCHAR *key_name_state(struct parser *parser, WCHAR *pos);
 109 static WCHAR *delete_key_state(struct parser *parser, WCHAR *pos);
 110 static WCHAR *default_value_name_state(struct parser *parser, WCHAR *pos);
 111 static WCHAR *quoted_value_name_state(struct parser *parser, WCHAR *pos);
 112 static WCHAR *data_start_state(struct parser *parser, WCHAR *pos);
 113 static WCHAR *delete_value_state(struct parser *parser, WCHAR *pos);
 114 static WCHAR *data_type_state(struct parser *parser, WCHAR *pos);
 115 static WCHAR *string_data_state(struct parser *parser, WCHAR *pos);
 116 static WCHAR *dword_data_state(struct parser *parser, WCHAR *pos);
 117 static WCHAR *hex_data_state(struct parser *parser, WCHAR *pos);
 118 static WCHAR *eol_backslash_state(struct parser *parser, WCHAR *pos);
 119 static WCHAR *hex_multiline_state(struct parser *parser, WCHAR *pos);
 120 static WCHAR *unknown_data_state(struct parser *parser, WCHAR *pos);
 121 static WCHAR *set_value_state(struct parser *parser, WCHAR *pos);
 122
 123 static const parser_state_func parser_funcs[NB_PARSER_STATES] =
 124 {
 125     header_state,              /* HEADER */
 126     parse_win31_line_state,    /* PARSE_WIN31_LINE */
 127     line_start_state,          /* LINE_START */
 128     key_name_state,            /* KEY_NAME */
 129     delete_key_state,          /* DELETE_KEY */
 130     default_value_name_state,  /* DEFAULT_VALUE_NAME */
 131     quoted_value_name_state,   /* QUOTED_VALUE_NAME */
 132     data_start_state,          /* DATA_START */
 133     delete_value_state,        /* DELETE_VALUE */
 134     data_type_state,           /* DATA_TYPE */
 135     string_data_state,         /* STRING_DATA */
 136     dword_data_state,          /* DWORD_DATA */
 137     hex_data_state,            /* HEX_DATA */
 138     eol_backslash_state,       /* EOL_BACKSLASH */
 139     hex_multiline_state,       /* HEX_MULTILINE */
 140     unknown_data_state,        /* UNKNOWN_DATA */
 141     set_value_state,           /* SET_VALUE */
 142 };
 143
 144 /* set the new parser state and return the previous one */
 145 static inline enum parser_state set_state(struct parser *parser, enum parser_state state)
 146 {
 147     enum parser_state ret = parser->state;
 148     parser->state = state;
 149     return ret;
 150 }
 151
 152 /******************************************************************************
 153  * Converts a hex representation of a DWORD into a DWORD.
 154  */
 155 static BOOL convert_hex_to_dword(WCHAR *str, DWORD *dw)
 156 {
 157     WCHAR *p, *end;
 158     int count = 0;
 159
 160     while (*str == ' ' || *str == '\t') str++;
 161     if (!*str) goto error;
 162
 163     p = str;
 164     while (iswxdigit(*p))
 165     {
 166         count++;
 167         p++;
 168     }
 169     if (count > 8) goto error;
 170
 171     end = p;
 172     while (*p == ' ' || *p == '\t') p++;
 173     if (*p && *p != ';') goto error;
 174
 175     *end = 0;
 176     *dw = wcstoul(str, &end, 16);
 177     return TRUE;
 178
 179 error:
 180     return FALSE;
 181 }
 182
 183 /******************************************************************************
 184  * Converts comma-separated hex data into a binary string and modifies
 185  * the input parameter to skip the concatenating backslash, if found.
 186  *
 187  * Returns TRUE or FALSE to indicate whether parsing was successful.
 188  */
 189 static BOOL convert_hex_csv_to_hex(struct parser *parser, WCHAR **str)
 190 {
 191     size_t size;
 192     BYTE *d;
 193     WCHAR *s;
 194
 195     parser->backslash = FALSE;
 196
 197     /* The worst case is 1 digit + 1 comma per byte */
 198     size = ((lstrlenW(*str) + 1) / 2) + parser->data_size;
 199     parser->data = heap_xrealloc(parser->data, size);
 200
 201     s = *str;
 202     d = (BYTE *)parser->data + parser->data_size;
 203
 204     while (*s)
 205     {
 206         WCHAR *end;
 207         unsigned long wc;
 208
 209         wc = wcstoul(s, &end, 16);
 210         if (wc > 0xff) return FALSE;
 211
 212         if (s == end && wc == 0)
 213         {
 214             while (*end == ' ' || *end == '\t') end++;
 215             if (*end == '\\')
 216             {
 217                 parser->backslash = TRUE;
 218                 *str = end + 1;
 219                 return TRUE;
 220             }
 221             else if (*end == ';')
 222                 return TRUE;
 223             return FALSE;
 224         }
 225
 226         *d++ = wc;
 227         parser->data_size++;
 228
 229         if (*end && *end != ',')
 230         {
 231             while (*end == ' ' || *end == '\t') end++;
 232             if (*end && *end != ';') return FALSE;
 233             return TRUE;
 234         }
 235
 236         if (*end) end++;
 237         s = end;
 238     }
 239
 240     return TRUE;
 241 }
 242
 243 /******************************************************************************
 244  * Parses the data type of the registry value being imported and modifies
 245  * the input parameter to skip the string representation of the data type.
 246  *
 247  * Returns TRUE or FALSE to indicate whether a data type was found.
 248  */
 249 static BOOL parse_data_type(struct parser *parser, WCHAR **line)
 250 {
 251     struct data_type { const WCHAR *tag; int len; int type; int parse_type; };
 252
 253     static const WCHAR quote[] = {'"'};
 254     static const WCHAR hex[] = {'h','e','x',':'};
 255     static const WCHAR dword[] = {'d','w','o','r','d',':'};
 256     static const WCHAR hexp[] = {'h','e','x','('};
 257
 258     static const struct data_type data_types[] = {
 259     /*    tag    len  type         parse type    */
 260         { quote,  1,  REG_SZ,      REG_SZ },
 261         { hex,    4,  REG_BINARY,  REG_BINARY },
 262         { dword,  6,  REG_DWORD,   REG_DWORD },
 263         { hexp,   4,  -1,          REG_BINARY }, /* REG_NONE, REG_EXPAND_SZ, REG_MULTI_SZ */
 264         { NULL,   0,  0,           0 }
 265     };
 266
 267     const struct data_type *ptr;
 268
 269     for (ptr = data_types; ptr->tag; ptr++)
 270     {
 271         if (wcsncmp(ptr->tag, *line, ptr->len))
 272             continue;
 273
 274         parser->parse_type = ptr->parse_type;
 275         parser->data_type = ptr->parse_type;
 276         *line += ptr->len;
 277
 278         if (ptr->type == -1)
 279         {
 280             WCHAR *end;
 281             DWORD val;
 282
 283             if (!**line || towlower((*line)[1]) == 'x')
 284                 return FALSE;
 285
 286             /* "hex(xx):" is special */
 287             val = wcstoul(*line, &end, 16);
 288             if (*end != ')' || *(end + 1) != ':' || (val == ~0u && errno == ERANGE))
 289                 return FALSE;
 290
 291             parser->data_type = val;
 292             *line = end + 2;
 293         }
 294         return TRUE;
 295     }
 296     return FALSE;
 297 }
 298
 299 /******************************************************************************
 300  * Replaces escape sequences with their character equivalents and
 301  * null-terminates the string on the first non-escaped double quote.
 302  *
 303  * Assigns a pointer to the remaining unparsed data in the line.
 304  * Returns TRUE or FALSE to indicate whether a closing double quote was found.
 305  */
 306 static BOOL unescape_string(WCHAR *str, WCHAR **unparsed)
 307 {
 308     int str_idx = 0;            /* current character under analysis */
 309     int val_idx = 0;            /* the last character of the unescaped string */
 310     int len = lstrlenW(str);
 311     BOOL ret;
 312
 313     for (str_idx = 0; str_idx < len; str_idx++, val_idx++)
 314     {
 315         if (str[str_idx] == '\\')
 316         {
 317             str_idx++;
 318             switch (str[str_idx])
 319             {
 320             case 'n':
 321                 str[val_idx] = '\n';
 322                 break;
 323             case 'r':
 324                 str[val_idx] = '\r';
 325                 break;
 326             case '0':
 327                 str[val_idx] = '\0';
 328                 break;
 329             case '\\':
 330             case '"':
 331                 str[val_idx] = str[str_idx];
 332                 break;
 333             default:
 334                 if (!str[str_idx]) return FALSE;
 335                 output_message(STRING_ESCAPE_SEQUENCE, str[str_idx]);
 336                 str[val_idx] = str[str_idx];
 337                 break;
 338             }
 339         }
 340         else if (str[str_idx] == '"')
 341             break;
 342         else
 343             str[val_idx] = str[str_idx];
 344     }
 345
 346     ret = (str[str_idx] == '"');
 347     *unparsed = str + str_idx + 1;
 348     str[val_idx] = '\0';
 349     return ret;
 350 }
 351
 352 static HKEY parse_key_name(WCHAR *key_name, WCHAR **key_path)
 353 {
 354     if (!key_name) return 0;
 355
 356     *key_path = wcschr(key_name, '\\');
 357     if (*key_path) (*key_path)++;
 358
 359     return path_get_rootkey(key_name);
 360 }
 361
 362 static void close_key(struct parser *parser)
 363 {
 364     if (parser->hkey)
 365     {
 366         heap_free(parser->key_name);
 367         parser->key_name = NULL;
 368
 369         RegCloseKey(parser->hkey);
 370         parser->hkey = NULL;
 371     }
 372 }
 373
 374 static LONG open_key(struct parser *parser, WCHAR *path)
 375 {
 376     HKEY key_class;
 377     WCHAR *key_path;
 378     LONG res;
 379
 380     close_key(parser);
 381
 382     /* Get the registry class */
 383     if (!path || !(key_class = parse_key_name(path, &key_path)))
 384         return ERROR_INVALID_PARAMETER;
 385
 386     res = RegCreateKeyExW(key_class, key_path, 0, NULL, REG_OPTION_NON_VOLATILE,
 387                           KEY_ALL_ACCESS, NULL, &parser->hkey, NULL);
 388
 389     if (res == ERROR_SUCCESS)
 390     {
 391         parser->key_name = heap_xalloc((lstrlenW(path) + 1) * sizeof(WCHAR));
 392         lstrcpyW(parser->key_name, path);
 393     }
 394     else
 395         parser->hkey = NULL;
 396
 397     return res;
 398 }
 399
 400 static void free_parser_data(struct parser *parser)
 401 {
 402     if (parser->parse_type == REG_DWORD || parser->parse_type == REG_BINARY)
 403         heap_free(parser->data);
 404
 405     parser->data = NULL;
 406     parser->data_size = 0;
 407 }
 408
 409 static void prepare_hex_string_data(struct parser *parser)
 410 {
 411     if (parser->data_type == REG_EXPAND_SZ || parser->data_type == REG_MULTI_SZ ||
 412         parser->data_type == REG_SZ)
 413     {
 414         if (parser->is_unicode)
 415         {
 416             WCHAR *data = parser->data;
 417             DWORD len = parser->data_size / sizeof(WCHAR);
 418
 419             if (data[len - 1] != 0)
 420             {
 421                 data[len] = 0;
 422                 parser->data_size += sizeof(WCHAR);
 423             }
 424         }
 425         else
 426         {
 427             BYTE *data = parser->data;
 428
 429             if (data[parser->data_size - 1] != 0)
 430             {
 431                 data[parser->data_size] = 0;
 432                 parser->data_size++;
 433             }
 434
 435             parser->data = GetWideStringN(parser->data, parser->data_size, &parser->data_size);
 436             parser->data_size *= sizeof(WCHAR);
 437             heap_free(data);
 438         }
 439     }
 440 }
 441
 442 enum reg_versions {
 443     REG_VERSION_31,
 444     REG_VERSION_40,
 445     REG_VERSION_50,
 446     REG_VERSION_FUZZY,
 447     REG_VERSION_INVALID
 448 };
 449
 450 static enum reg_versions parse_file_header(const WCHAR *s)
 451 {
 452     static const WCHAR header_31[] = {'R','E','G','E','D','I','T',0};
 453     static const WCHAR header_40[] = {'R','E','G','E','D','I','T','4',0};
 454     static const WCHAR header_50[] = {'W','i','n','d','o','w','s',' ',
 455                                       'R','e','g','i','s','t','r','y',' ','E','d','i','t','o','r',' ',
 456                                       'V','e','r','s','i','o','n',' ','5','.','0','0',0};
 457
 458     while (*s == ' ' || *s == '\t') s++;
 459
 460     if (!lstrcmpW(s, header_31))
 461         return REG_VERSION_31;
 462
 463     if (!lstrcmpW(s, header_40))
 464         return REG_VERSION_40;
 465
 466     if (!lstrcmpW(s, header_50))
 467         return REG_VERSION_50;
 468
 469     /* The Windows version accepts registry file headers beginning with "REGEDIT" and ending
 470      * with other characters, as long as "REGEDIT" appears at the start of the line. For example,
 471      * "REGEDIT 4", "REGEDIT9" and "REGEDIT4FOO" are all treated as valid file headers.
 472      * In all such cases, however, the contents of the registry file are not imported.
 473      */
 474     if (!wcsncmp(s, header_31, 7)) /* "REGEDIT" without NUL */
 475         return REG_VERSION_FUZZY;
 476
 477     return REG_VERSION_INVALID;
 478 }
 479
 480 /* handler for parser HEADER state */
 481 static WCHAR *header_state(struct parser *parser, WCHAR *pos)
 482 {
 483     WCHAR *line, *header;
 484
 485     if (!(line = get_line(parser->file)))
 486         return NULL;
 487
 488     if (!parser->is_unicode)
 489     {
 490         header = heap_xalloc((lstrlenW(line) + 3) * sizeof(WCHAR));
 491         header[0] = parser->two_wchars[0];
 492         header[1] = parser->two_wchars[1];
 493         lstrcpyW(header + 2, line);
 494         parser->reg_version = parse_file_header(header);
 495         heap_free(header);
 496     }
 497     else parser->reg_version = parse_file_header(line);
 498
 499     switch (parser->reg_version)
 500     {
 501     case REG_VERSION_31:
 502         set_state(parser, PARSE_WIN31_LINE);
 503         break;
 504     case REG_VERSION_40:
 505     case REG_VERSION_50:
 506         set_state(parser, LINE_START);
 507         break;
 508     default:
 509         get_line(NULL); /* Reset static variables */
 510         return NULL;
 511     }
 512
 513     return line;
 514 }
 515
 516 /* handler for parser PARSE_WIN31_LINE state */
 517 static WCHAR *parse_win31_line_state(struct parser *parser, WCHAR *pos)
 518 {
 519     WCHAR *line, *value;
 520     static WCHAR hkcr[] = {'H','K','E','Y','_','C','L','A','S','S','E','S','_','R','O','O','T'};
 521     unsigned int key_end = 0;
 522
 523     if (!(line = get_line(parser->file)))
 524         return NULL;
 525
 526     if (wcsncmp(line, hkcr, ARRAY_SIZE(hkcr)))
 527         return line;
 528
 529     /* get key name */
 530     while (line[key_end] && !iswspace(line[key_end])) key_end++;
 531
 532     value = line + key_end;
 533     while (*value == ' ' || *value == '\t') value++;
 534
 535     if (*value == '=') value++;
 536     if (*value == ' ') value++; /* at most one space is skipped */
 537
 538     line[key_end] = 0;
 539
 540     if (open_key(parser, line) != ERROR_SUCCESS)
 541     {
 542         output_message(STRING_OPEN_KEY_FAILED, line);
 543         return line;
 544     }
 545
 546     parser->value_name = NULL;
 547     parser->data_type = REG_SZ;
 548     parser->data = value;
 549     parser->data_size = (lstrlenW(value) + 1) * sizeof(WCHAR);
 550
 551     set_state(parser, SET_VALUE);
 552     return value;
 553 }
 554
 555 /* handler for parser LINE_START state */
 556 static WCHAR *line_start_state(struct parser *parser, WCHAR *pos)
 557 {
 558     WCHAR *line, *p;
 559
 560     if (!(line = get_line(parser->file)))
 561         return NULL;
 562
 563     for (p = line; *p; p++)
 564     {
 565         switch (*p)
 566         {
 567         case '[':
 568             set_state(parser, KEY_NAME);
 569             return p + 1;
 570         case '@':
 571             set_state(parser, DEFAULT_VALUE_NAME);
 572             return p;
 573         case '"':
 574             set_state(parser, QUOTED_VALUE_NAME);
 575             return p + 1;
 576         case ' ':
 577         case '\t':
 578             break;
 579         default:
 580             return p;
 581         }
 582     }
 583
 584     return p;
 585 }
 586
 587 /* handler for parser KEY_NAME state */
 588 static WCHAR *key_name_state(struct parser *parser, WCHAR *pos)
 589 {
 590     WCHAR *p = pos, *key_end;
 591
 592     if (*p == ' ' || *p == '\t' || !(key_end = wcsrchr(p, ']')))
 593         goto done;
 594
 595     *key_end = 0;
 596
 597     if (*p == '-')
 598     {
 599         set_state(parser, DELETE_KEY);
 600         return p + 1;
 601     }
 602     else if (open_key(parser, p) != ERROR_SUCCESS)
 603         output_message(STRING_OPEN_KEY_FAILED, p);
 604
 605 done:
 606     set_state(parser, LINE_START);
 607     return p;
 608 }
 609
 610 /* handler for parser DELETE_KEY state */
 611 static WCHAR *delete_key_state(struct parser *parser, WCHAR *pos)
 612 {
 613     WCHAR *p = pos;
 614
 615     close_key(parser);
 616
 617     if (*p == 'H' || *p == 'h')
 618     {
 619         HKEY root;
 620         WCHAR *path;
 621
 622         root = parse_key_name(p, &path);
 623
 624         if (root && path && *path)
 625             RegDeleteTreeW(root, path);
 626     }
 627
 628     set_state(parser, LINE_START);
 629     return p;
 630 }
 631
 632 /* handler for parser DEFAULT_VALUE_NAME state */
 633 static WCHAR *default_value_name_state(struct parser *parser, WCHAR *pos)
 634 {
 635     heap_free(parser->value_name);
 636     parser->value_name = NULL;
 637
 638     set_state(parser, DATA_START);
 639     return pos + 1;
 640 }
 641
 642 /* handler for parser QUOTED_VALUE_NAME state */
 643 static WCHAR *quoted_value_name_state(struct parser *parser, WCHAR *pos)
 644 {
 645     WCHAR *val_name = pos, *p;
 646
 647     heap_free(parser->value_name);
 648     parser->value_name = NULL;
 649
 650     if (!unescape_string(val_name, &p))
 651         goto invalid;
 652
 653     /* copy the value name in case we need to parse multiple lines and the buffer is overwritten */
 654     parser->value_name = heap_xalloc((lstrlenW(val_name) + 1) * sizeof(WCHAR));
 655     lstrcpyW(parser->value_name, val_name);
 656
 657     set_state(parser, DATA_START);
 658     return p;
 659
 660 invalid:
 661     set_state(parser, LINE_START);
 662     return val_name;
 663 }
 664
 665 /* handler for parser DATA_START state */
 666 static WCHAR *data_start_state(struct parser *parser, WCHAR *pos)
 667 {
 668     WCHAR *p = pos;
 669     unsigned int len;
 670
 671     while (*p == ' ' || *p == '\t') p++;
 672     if (*p != '=') goto invalid;
 673     p++;
 674     while (*p == ' ' || *p == '\t') p++;
 675
 676     /* trim trailing whitespace */
 677     len = lstrlenW(p);
 678     while (len > 0 && (p[len - 1] == ' ' || p[len - 1] == '\t')) len--;
 679     p[len] = 0;
 680
 681     if (*p == '-')
 682         set_state(parser, DELETE_VALUE);
 683     else
 684         set_state(parser, DATA_TYPE);
 685     return p;
 686
 687 invalid:
 688     set_state(parser, LINE_START);
 689     return p;
 690 }
 691
 692 /* handler for parser DELETE_VALUE state */
 693 static WCHAR *delete_value_state(struct parser *parser, WCHAR *pos)
 694 {
 695     WCHAR *p = pos + 1;
 696
 697     while (*p == ' ' || *p == '\t') p++;
 698     if (*p && *p != ';') goto done;
 699
 700     RegDeleteValueW(parser->hkey, parser->value_name);
 701
 702 done:
 703     set_state(parser, LINE_START);
 704     return p;
 705 }
 706
 707 /* handler for parser DATA_TYPE state */
 708 static WCHAR *data_type_state(struct parser *parser, WCHAR *pos)
 709 {
 710     WCHAR *line = pos;
 711
 712     if (!parse_data_type(parser, &line))
 713     {
 714         set_state(parser, LINE_START);
 715         return line;
 716     }
 717
 718     switch (parser->parse_type)
 719     {
 720     case REG_SZ:
 721         set_state(parser, STRING_DATA);
 722         break;
 723     case REG_DWORD:
 724         set_state(parser, DWORD_DATA);
 725         break;
 726     case REG_BINARY: /* all hex data types, including undefined */
 727         set_state(parser, HEX_DATA);
 728         break;
 729     default:
 730         set_state(parser, UNKNOWN_DATA);
 731     }
 732
 733     return line;
 734 }
 735
 736 /* handler for parser STRING_DATA state */
 737 static WCHAR *string_data_state(struct parser *parser, WCHAR *pos)
 738 {
 739     WCHAR *line;
 740
 741     parser->data = pos;
 742
 743     if (!unescape_string(parser->data, &line))
 744         goto invalid;
 745
 746     while (*line == ' ' || *line == '\t') line++;
 747     if (*line && *line != ';') goto invalid;
 748
 749     parser->data_size = (lstrlenW(parser->data) + 1) * sizeof(WCHAR);
 750
 751     set_state(parser, SET_VALUE);
 752     return line;
 753
 754 invalid:
 755     free_parser_data(parser);
 756     set_state(parser, LINE_START);
 757     return line;
 758 }
 759
 760 /* handler for parser DWORD_DATA state */
 761 static WCHAR *dword_data_state(struct parser *parser, WCHAR *pos)
 762 {
 763     WCHAR *line = pos;
 764
 765     parser->data = heap_xalloc(sizeof(DWORD));
 766
 767     if (!convert_hex_to_dword(line, parser->data))
 768         goto invalid;
 769
 770     parser->data_size = sizeof(DWORD);
 771
 772     set_state(parser, SET_VALUE);
 773     return line;
 774
 775 invalid:
 776     free_parser_data(parser);
 777     set_state(parser, LINE_START);
 778     return line;
 779 }
 780
 781 /* handler for parser HEX_DATA state */
 782 static WCHAR *hex_data_state(struct parser *parser, WCHAR *pos)
 783 {
 784     WCHAR *line = pos;
 785
 786     if (!*line)
 787         goto set_value;
 788
 789     if (!convert_hex_csv_to_hex(parser, &line))
 790         goto invalid;
 791
 792     if (parser->backslash)
 793     {
 794         set_state(parser, EOL_BACKSLASH);
 795         return line;
 796     }
 797
 798     prepare_hex_string_data(parser);
 799
 800 set_value:
 801     set_state(parser, SET_VALUE);
 802     return line;
 803
 804 invalid:
 805     free_parser_data(parser);
 806     set_state(parser, LINE_START);
 807     return line;
 808 }
 809
 810 /* handler for parser EOL_BACKSLASH state */
 811 static WCHAR *eol_backslash_state(struct parser *parser, WCHAR *pos)
 812 {
 813     WCHAR *p = pos;
 814
 815     while (*p == ' ' || *p == '\t') p++;
 816     if (*p && *p != ';') goto invalid;
 817
 818     set_state(parser, HEX_MULTILINE);
 819     return pos;
 820
 821 invalid:
 822     free_parser_data(parser);
 823     set_state(parser, LINE_START);
 824     return p;
 825 }
 826
 827 /* handler for parser HEX_MULTILINE state */
 828 static WCHAR *hex_multiline_state(struct parser *parser, WCHAR *pos)
 829 {
 830     WCHAR *line;
 831
 832     if (!(line = get_line(parser->file)))
 833     {
 834         prepare_hex_string_data(parser);
 835         set_state(parser, SET_VALUE);
 836         return pos;
 837     }
 838
 839     while (*line == ' ' || *line == '\t') line++;
 840     if (!*line || *line == ';') return line;
 841
 842     if (!iswxdigit(*line)) goto invalid;
 843
 844     set_state(parser, HEX_DATA);
 845     return line;
 846
 847 invalid:
 848     free_parser_data(parser);
 849     set_state(parser, LINE_START);
 850     return line;
 851 }
 852
 853 /* handler for parser UNKNOWN_DATA state */
 854 static WCHAR *unknown_data_state(struct parser *parser, WCHAR *pos)
 855 {
 856     FIXME("Unknown registry data type [0x%x]\n", parser->data_type);
 857
 858     set_state(parser, LINE_START);
 859     return pos;
 860 }
 861
 862 /* handler for parser SET_VALUE state */
 863 static WCHAR *set_value_state(struct parser *parser, WCHAR *pos)
 864 {
 865     RegSetValueExW(parser->hkey, parser->value_name, 0, parser->data_type,
 866                    parser->data, parser->data_size);
 867
 868     free_parser_data(parser);
 869
 870     if (parser->reg_version == REG_VERSION_31)
 871         set_state(parser, PARSE_WIN31_LINE);
 872     else
 873         set_state(parser, LINE_START);
 874
 875     return pos;
 876 }
 877
 878 #define REG_VAL_BUF_SIZE  4096
 879
 880 static WCHAR *get_lineA(FILE *fp)
 881 {
 882     static WCHAR *lineW;
 883     static size_t size;
 884     static char *buf, *next;
 885     char *line;
 886
 887     heap_free(lineW);
 888
 889     if (!fp) goto cleanup;
 890
 891     if (!size)
 892     {
 893         size = REG_VAL_BUF_SIZE;
 894         buf = heap_xalloc(size);
 895         *buf = 0;
 896         next = buf;
 897     }
 898     line = next;
 899
 900     while (next)
 901     {
 902         char *p = strpbrk(line, "\r\n");
 903         if (!p)
 904         {
 905             size_t len, count;
 906             len = strlen(next);
 907             memmove(buf, next, len + 1);
 908             if (size - len < 3)
 909             {
 910                 size *= 2;
 911                 buf = heap_xrealloc(buf, size);
 912             }
 913             if (!(count = fread(buf + len, 1, size - len - 1, fp)))
 914             {
 915                 next = NULL;
 916                 lineW = GetWideString(buf);
 917                 return lineW;
 918             }
 919             buf[len + count] = 0;
 920             next = buf;
 921             line = buf;
 922             continue;
 923         }
 924         next = p + 1;
 925         if (*p == '\r' && *(p + 1) == '\n') next++;
 926         *p = 0;
 927         lineW = GetWideString(line);
 928         return lineW;
 929     }
 930
 931 cleanup:
 932     lineW = NULL;
 933     if (size) heap_free(buf);
 934     size = 0;
 935     return NULL;
 936 }
 937
 938 static WCHAR *get_lineW(FILE *fp)
 939 {
 940     static size_t size;
 941     static WCHAR *buf, *next;
 942     WCHAR *line;
 943
 944     if (!fp) goto cleanup;
 945
 946     if (!size)
 947     {
 948         size = REG_VAL_BUF_SIZE;
 949         buf = heap_xalloc(size * sizeof(WCHAR));
 950         *buf = 0;
 951         next = buf;
 952     }
 953     line = next;
 954
 955     while (next)
 956     {
 957         static const WCHAR line_endings[] = {'\r','\n',0};
 958         WCHAR *p = wcspbrk(line, line_endings);
 959         if (!p)
 960         {
 961             size_t len, count;
 962             len = lstrlenW(next);
 963             memmove(buf, next, (len + 1) * sizeof(WCHAR));
 964             if (size - len < 3)
 965             {
 966                 size *= 2;
 967                 buf = heap_xrealloc(buf, size * sizeof(WCHAR));
 968             }
 969             if (!(count = fread(buf + len, sizeof(WCHAR), size - len - 1, fp)))
 970             {
 971                 next = NULL;
 972                 return buf;
 973             }
 974             buf[len + count] = 0;
 975             next = buf;
 976             line = buf;
 977             continue;
 978         }
 979         next = p + 1;
 980         if (*p == '\r' && *(p + 1) == '\n') next++;
 981         *p = 0;
 982         return line;
 983     }
 984
 985 cleanup:
 986     if (size) heap_free(buf);
 987     size = 0;
 988     return NULL;
 989 }
 990
 991 int reg_import(const WCHAR *filename)
 992 {
 993     FILE *fp;
 994     static const WCHAR rb_mode[] = {'r','b',0};
 995     BYTE s[2];
 996     struct parser parser;
 997     WCHAR *pos;
 998
 999     fp = _wfopen(filename, rb_mode);
1000     if (!fp)
1001     {
1002         output_message(STRING_FILE_NOT_FOUND, filename);
1003         return 1;
1004     }
1005
1006     if (fread(s, sizeof(WCHAR), 1, fp) != 1)
1007         goto error;
1008
1009     parser.is_unicode = (s[0] == 0xff && s[1] == 0xfe);
1010     get_line = parser.is_unicode ? get_lineW : get_lineA;
1011
1012     parser.file          = fp;
1013     parser.two_wchars[0] = s[0];
1014     parser.two_wchars[1] = s[1];
1015     parser.reg_version   = -1;
1016     parser.hkey          = NULL;
1017     parser.key_name      = NULL;
1018     parser.value_name    = NULL;
1019     parser.parse_type    = 0;
1020     parser.data_type     = 0;
1021     parser.data          = NULL;
1022     parser.data_size     = 0;
1023     parser.backslash     = FALSE;
1024     parser.state         = HEADER;
1025
1026     pos = parser.two_wchars;
1027
1028     /* parser main loop */
1029     while (pos)
1030         pos = (parser_funcs[parser.state])(&parser, pos);
1031
1032     if (parser.reg_version == REG_VERSION_INVALID)
1033         goto error;
1034
1035     heap_free(parser.value_name);
1036     close_key(&parser);
1037
1038     fclose(fp);
1039     return 0;
1040
1041 error:
1042     fclose(fp);
1043     return 1;
1044 }