ReactOS  0.4.14-dev-838-g99f979d
res.c
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1 /*
2  * PE file resources
3  *
4  * Copyright 1995 Thomas Sandford
5  * Copyright 1996 Martin von Loewis
6  * Copyright 2003 Alexandre Julliard
7  * Copyright 1993 Robert J. Amstadt
8  * Copyright 1997 Marcus Meissner
9  *
10  * This library is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * This library is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with this library; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 /* INCLUDES *****************************************************************/
26 
27 #include <rtl.h>
28 
29 #define NDEBUG
30 #include <debug.h>
31 
33  ULONG level, void **ret, int want_dir );
34 
35 /* FUNCTIONS ****************************************************************/
36 
38 {
43 }
44 
45 /**********************************************************************
46  * is_data_file_module
47  *
48  * Check if a module handle is for a LOAD_LIBRARY_AS_DATAFILE module.
49  */
51 {
52  return (ULONG_PTR)BaseAddress & 1;
53 }
54 
55 
56 /**********************************************************************
57  * push_language
58  *
59  * push a language in the list of languages to try
60  */
62 {
63  ULONG i;
64  for (i = 0; i < pos; i++) if (list[i] == lang) return pos;
65  list[pos++] = lang;
66  return pos;
67 }
68 
69 
70 /**********************************************************************
71  * find_first_entry
72  *
73  * Find the first suitable entry in a resource directory
74  */
76  void *root, int want_dir )
77 {
79  int pos;
80 
81  for (pos = 0; pos < dir->NumberOfNamedEntries + dir->NumberOfIdEntries; pos++)
82  {
83  if (!entry[pos].DataIsDirectory == !want_dir)
84  return (IMAGE_RESOURCE_DIRECTORY *)((char *)root + entry[pos].OffsetToDirectory);
85  }
86  return NULL;
87 }
88 
89 
90 /**********************************************************************
91  * find_entry_by_id
92  *
93  * Find an entry by id in a resource directory
94  */
96  WORD id, void *root, int want_dir )
97 {
99  int min, max, pos;
100 
101  entry = (const IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
102  min = dir->NumberOfNamedEntries;
103  max = min + dir->NumberOfIdEntries - 1;
104  while (min <= max)
105  {
106  pos = (min + max) / 2;
107  if (entry[pos].Id == id)
108  {
109  if (!entry[pos].DataIsDirectory == !want_dir)
110  {
111  DPRINT("root %p dir %p id %04x ret %p\n",
112  root, dir, id, (const char*)root + entry[pos].OffsetToDirectory);
113  return (IMAGE_RESOURCE_DIRECTORY *)((char *)root + entry[pos].OffsetToDirectory);
114  }
115  break;
116  }
117  if (entry[pos].Id > id) max = pos - 1;
118  else min = pos + 1;
119  }
120  DPRINT("root %p dir %p id %04x not found\n", root, dir, id );
121  return NULL;
122 }
123 
124 
125 /**********************************************************************
126  * find_entry_by_name
127  *
128  * Find an entry by name in a resource directory
129  */
131  LPCWSTR name, void *root,
132  int want_dir )
133 {
136  int min, max, res, pos;
137  size_t namelen;
138 
139  if (!((ULONG_PTR)name & 0xFFFF0000)) return find_entry_by_id( dir, (ULONG_PTR)name & 0xFFFF, root, want_dir );
140  entry = (const IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
141  namelen = wcslen(name);
142  min = 0;
143  max = dir->NumberOfNamedEntries - 1;
144  while (min <= max)
145  {
146  pos = (min + max) / 2;
147  str = (const IMAGE_RESOURCE_DIR_STRING_U *)((const char *)root + entry[pos].NameOffset);
148  res = _wcsnicmp( name, str->NameString, str->Length );
149  if (!res && namelen == str->Length)
150  {
151  if (!entry[pos].DataIsDirectory == !want_dir)
152  {
153  DPRINT("root %p dir %p name %ws ret %p\n",
154  root, dir, name, (const char*)root + entry[pos].OffsetToDirectory);
155  return (IMAGE_RESOURCE_DIRECTORY *)((char *)root + entry[pos].OffsetToDirectory);
156  }
157  break;
158  }
159  if (res < 0) max = pos - 1;
160  else min = pos + 1;
161  }
162  DPRINT("root %p dir %p name %ws not found\n", root, dir, name);
163  return NULL;
164 }
165 
166 #ifdef __i386__
168  void **ptr, ULONG *size )
169 #else
171  void **ptr, ULONG *size )
172 #endif
173 {
175 
176  _SEH2_TRY
177  {
178  ULONG dirsize;
179 
182  else
183  {
184  if (ptr)
185  {
187  {
188  PVOID mod = (PVOID)((ULONG_PTR)BaseAddress & ~1);
189  *ptr = RtlImageRvaToVa( RtlImageNtHeader(mod), mod, entry->OffsetToData, NULL );
190  }
191  else *ptr = (char *)BaseAddress + entry->OffsetToData;
192  }
193  if (size) *size = entry->Size;
194  }
195  }
197  {
199  }
200  _SEH2_END;
201  return status;
202 }
203 
204 
205 /*
206  * @implemented
207  */
210  PLDR_RESOURCE_INFO ResourceInfo,
211  ULONG Level,
212  PIMAGE_RESOURCE_DATA_ENTRY* ResourceDataEntry)
213 {
214  void *res;
216 
217  _SEH2_TRY
218  {
219  if (ResourceInfo)
220  {
221  DPRINT( "module %p type %lx name %lx lang %04lx level %lu\n",
222  BaseAddress, ResourceInfo->Type,
223  Level > 1 ? ResourceInfo->Name : 0,
224  Level > 2 ? ResourceInfo->Language : 0, Level );
225  }
226 
227  status = find_entry( BaseAddress, ResourceInfo, Level, &res, FALSE );
228  if (NT_SUCCESS(status))
229  *ResourceDataEntry = res;
230  }
232  {
234  }
235  _SEH2_END;
236  return status;
237 }
238 
239 #ifndef __i386__
240 /*
241  * @implemented
242  */
245  IN PIMAGE_RESOURCE_DATA_ENTRY ResourceDataEntry,
248 {
249  return LdrpAccessResource( BaseAddress, ResourceDataEntry, Resource, Size );
250 }
251 #endif
252 
253 /*
254  * @implemented
255  */
259  IN ULONG level,
261 {
262  void *res;
264 
265  _SEH2_TRY
266  {
267  if (info)
268  {
269  DPRINT( "module %p type %ws name %ws lang %04lx level %lu\n",
270  BaseAddress, (LPCWSTR)info->Type,
271  level > 1 ? (LPCWSTR)info->Name : L"",
272  level > 2 ? info->Language : 0, level );
273  }
274 
276  if (NT_SUCCESS(status))
277  *addr = res;
278  }
280  {
282  }
283  _SEH2_END;
284  return status;
285 }
286 
287 
288 #define NAME_FROM_RESOURCE_ENTRY(RootDirectory, Entry) \
289  ((Entry)->NameIsString ? (ULONG_PTR)(RootDirectory) + (Entry)->NameOffset : (Entry)->Id)
290 
291 static
292 LONG
294  _In_ PUCHAR ResourceData,
297 {
298  PIMAGE_RESOURCE_DIR_STRING_U ResourceString;
299  PWSTR String1, String2;
300  USHORT ResourceStringLength;
301  WCHAR Char1, Char2;
302 
303  /* Check if the resource name is an ID */
304  if (CompareName <= USHRT_MAX)
305  {
306  /* Just compare the 2 IDs */
307  return (CompareName - Entry->Id);
308  }
309  else
310  {
311  /* Get the resource string */
312  ResourceString = (PIMAGE_RESOURCE_DIR_STRING_U)(ResourceData +
313  Entry->NameOffset);
314 
315  /* Get the string length */
316  ResourceStringLength = ResourceString->Length;
317 
318  String1 = ResourceString->NameString;
320 
321  /* Loop all characters of the resource string */
322  while (ResourceStringLength--)
323  {
324  /* Get the next characters */
325  Char1 = *String1++;
326  Char2 = *String2++;
327 
328  /* Check if they don't match, or if the compare string ends */
329  if ((Char1 != Char2) || (Char2 == 0))
330  {
331  /* They don't match, fail */
332  return Char2 - Char1;
333  }
334  }
335 
336  /* All characters match, check if the compare string ends here */
337  return (*String2 == 0) ? 0 : 1;
338  }
339 }
340 
341 NTSTATUS
342 NTAPI
344  _In_ PVOID ImageBase,
345  _In_ PLDR_RESOURCE_INFO ResourceInfo,
346  _In_ ULONG Level,
349 {
350  PUCHAR ResourceData;
352  ULONG i, j, k;
353  ULONG NumberOfTypeEntries, NumberOfNameEntries, NumberOfLangEntries;
354  ULONG Count, MaxResourceCount;
355  PIMAGE_RESOURCE_DIRECTORY TypeDirectory, NameDirectory, LangDirectory;
356  PIMAGE_RESOURCE_DIRECTORY_ENTRY TypeEntry, NameEntry, LangEntry;
357  PIMAGE_RESOURCE_DATA_ENTRY DataEntry;
358  ULONG Size;
359  LONG Result;
360 
361  /* If the caller wants data, get the maximum count of entries */
362  MaxResourceCount = (Resources != NULL) ? *ResourceCount : 0;
363 
364  /* Default to 0 */
365  *ResourceCount = 0;
366 
367  /* Locate the resource directory */
368  ResourceData = RtlImageDirectoryEntryToData(ImageBase,
369  TRUE,
371  &Size);
372  if (ResourceData == NULL)
374 
375  /* The type directory is at the root, followed by the entries */
376  TypeDirectory = (PIMAGE_RESOURCE_DIRECTORY)ResourceData;
377  TypeEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(TypeDirectory + 1);
378 
379  /* Get the number of entries in the type directory */
380  NumberOfTypeEntries = TypeDirectory->NumberOfNamedEntries +
381  TypeDirectory->NumberOfIdEntries;
382 
383  /* Start with 0 resources and status success */
385  Count = 0;
386 
387  /* Loop all entries in the type directory */
388  for (i = 0; i < NumberOfTypeEntries; ++i, ++TypeEntry)
389  {
390  /* Check if comparison of types is requested */
392  {
393  /* Compare the type with the requested Type */
394  Result = LdrpCompareResourceNames_U(ResourceData,
395  TypeEntry,
396  ResourceInfo->Type);
397 
398  /* Not equal, continue with next entry */
399  if (Result != 0) continue;
400  }
401 
402  /* The entry must point to the name directory */
403  if (!TypeEntry->DataIsDirectory)
404  {
406  }
407 
408  /* Get a pointer to the name subdirectory and it's first entry */
409  NameDirectory = (PIMAGE_RESOURCE_DIRECTORY)(ResourceData +
410  TypeEntry->OffsetToDirectory);
411  NameEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(NameDirectory + 1);
412 
413  /* Get the number of entries in the name directory */
414  NumberOfNameEntries = NameDirectory->NumberOfNamedEntries +
415  NameDirectory->NumberOfIdEntries;
416 
417  /* Loop all entries in the name directory */
418  for (j = 0; j < NumberOfNameEntries; ++j, ++NameEntry)
419  {
420  /* Check if comparison of names is requested */
422  {
423  /* Compare the name with the requested name */
424  Result = LdrpCompareResourceNames_U(ResourceData,
425  NameEntry,
426  ResourceInfo->Name);
427 
428  /* Not equal, continue with next entry */
429  if (Result != 0) continue;
430  }
431 
432  /* The entry must point to the language directory */
433  if (!NameEntry->DataIsDirectory)
434  {
436  }
437 
438  /* Get a pointer to the language subdirectory and it's first entry */
439  LangDirectory = (PIMAGE_RESOURCE_DIRECTORY)(ResourceData +
440  NameEntry->OffsetToDirectory);
441  LangEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(LangDirectory + 1);
442 
443  /* Get the number of entries in the language directory */
444  NumberOfLangEntries = LangDirectory->NumberOfNamedEntries +
445  LangDirectory->NumberOfIdEntries;
446 
447  /* Loop all entries in the language directory */
448  for (k = 0; k < NumberOfLangEntries; ++k, ++LangEntry)
449  {
450  /* Check if comparison of languages is requested */
452  {
453  /* Compare the language with the requested language */
454  Result = LdrpCompareResourceNames_U(ResourceData,
455  LangEntry,
456  ResourceInfo->Language);
457 
458  /* Not equal, continue with next entry */
459  if (Result != 0) continue;
460  }
461 
462  /* This entry must point to data */
463  if (LangEntry->DataIsDirectory)
464  {
466  }
467 
468  /* Get a pointer to the data entry */
469  DataEntry = (PIMAGE_RESOURCE_DATA_ENTRY)(ResourceData +
470  LangEntry->OffsetToData);
471 
472  /* Check if there is still space to store the data */
473  if (Count < MaxResourceCount)
474  {
475  /* There is, fill the entry */
476  Resources[Count].Type =
477  NAME_FROM_RESOURCE_ENTRY(ResourceData, TypeEntry);
478  Resources[Count].Name =
479  NAME_FROM_RESOURCE_ENTRY(ResourceData, NameEntry);
480  Resources[Count].Language =
481  NAME_FROM_RESOURCE_ENTRY(ResourceData, LangEntry);
482  Resources[Count].Data = (PUCHAR)ImageBase + DataEntry->OffsetToData;
483  Resources[Count].Reserved = 0;
484  Resources[Count].Size = DataEntry->Size;
485  }
486  else
487  {
488  /* There is not enough space, save error status */
490  }
491 
492  /* Count this resource */
493  ++Count;
494  }
495  }
496  }
497 
498  /* Return the number of matching resources */
499  *ResourceCount = Count;
500  return Status;
501 }
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#define RESOURCE_LANGUAGE_LEVEL
Definition: ldrtypes.h:32
return STATUS_SUCCESS
Definition: btrfs.c:2938
static SERVICE_STATUS status
Definition: service.c:31
int k
Definition: mpi.c:3369
size_t __cdecl wcslen(_In_z_ const wchar_t *_Str)
base of all file and directory entries
Definition: entries.h:82
#define EXCEPTION_PRIV_INSTRUCTION
Definition: winbase.h:322
static int mod
Definition: i386-dis.c:1273
DWORD Size
Definition: pedump.c:460
Definition: ps.c:97
PULONG MinorVersion OPTIONAL
Definition: CrossNt.h:68