ReactOS  0.4.15-dev-5461-g062a8f2
chm.c
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1 /*
2  * CHM Utility API
3  *
4  * Copyright 2005 James Hawkins
5  * Copyright 2007 Jacek Caban
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20  */
21 
22 #include "hhctrl.h"
23 #include "stream.h"
24 #ifdef __REACTOS__
25 #include "resource.h"
26 #endif
27 
28 #include "winreg.h"
29 #include "shlwapi.h"
30 #include "wine/debug.h"
31 
33 
34 /* Reads a string from the #STRINGS section in the CHM file */
36 {
37  LPCSTR str;
38 
39  if(!chm->strings_stream)
40  return NULL;
41 
42  if(chm->strings_size <= (offset >> BLOCK_BITS)) {
43  chm->strings_size = (offset >> BLOCK_BITS)+1;
44  if(chm->strings)
45  chm->strings = heap_realloc_zero(chm->strings,
46  chm->strings_size*sizeof(char*));
47  else
48  chm->strings = heap_alloc_zero(
49  chm->strings_size*sizeof(char*));
50 
51  }
52 
53  if(!chm->strings[offset >> BLOCK_BITS]) {
55  DWORD read;
56  HRESULT hres;
57 
58  pos.QuadPart = offset & ~BLOCK_MASK;
59  hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
60  if(FAILED(hres)) {
61  WARN("Seek failed: %08x\n", hres);
62  return NULL;
63  }
64 
66 
67  hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
68  BLOCK_SIZE, &read);
69  if(FAILED(hres)) {
70  WARN("Read failed: %08x\n", hres);
72  chm->strings[offset >> BLOCK_BITS] = NULL;
73  return NULL;
74  }
75  }
76 
77  str = chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
78  TRACE("offset %#x => %s\n", offset, debugstr_a(str));
79  return str;
80 }
81 
83 {
84  IStream *stream;
85  DWORD ver=0xdeadbeef, read, buf_size;
86  char *buf;
87  HRESULT hres;
88 
89  struct {
90  WORD code;
91  WORD len;
92  } entry;
93 
94  static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
95 
96  hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
97  if(FAILED(hres)) {
98  WARN("Could not open #SYSTEM stream: %08x\n", hres);
99  return FALSE;
100  }
101 
102  IStream_Read(stream, &ver, sizeof(ver), &read);
103  TRACE("version is %x\n", ver);
104 
105  buf = heap_alloc(8*sizeof(DWORD));
106  buf_size = 8*sizeof(DWORD);
107 
108  while(1) {
109  hres = IStream_Read(stream, &entry, sizeof(entry), &read);
110  if(hres != S_OK)
111  break;
112 
113  if(entry.len > buf_size)
114  buf = heap_realloc(buf, buf_size=entry.len);
115 
116  hres = IStream_Read(stream, buf, entry.len, &read);
117  if(hres != S_OK)
118  break;
119 
120  switch(entry.code) {
121  case 0x0:
122  TRACE("TOC is %s\n", debugstr_an(buf, entry.len));
123  heap_free(chm->defToc);
124  chm->defToc = strdupnAtoW(buf, entry.len);
125  break;
126  case 0x2:
127  TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
128  heap_free(chm->defTopic);
129  chm->defTopic = strdupnAtoW(buf, entry.len);
130  break;
131  case 0x3:
132  TRACE("Title is %s\n", debugstr_an(buf, entry.len));
133  heap_free(chm->defTitle);
134  chm->defTitle = strdupnAtoW(buf, entry.len);
135  break;
136  case 0x4:
137  /* TODO: Currently only the Locale ID is loaded from this field */
138  TRACE("Locale is: %d\n", *(LCID*)&buf[0]);
139  if(!GetLocaleInfoW(*(LCID*)&buf[0], LOCALE_IDEFAULTANSICODEPAGE|LOCALE_RETURN_NUMBER,
140  (WCHAR *)&chm->codePage, sizeof(chm->codePage)/sizeof(WCHAR)))
141  chm->codePage = CP_ACP;
142  break;
143  case 0x5:
144  TRACE("Window name is %s\n", debugstr_an(buf, entry.len));
145  chm->defWindow = strdupnAtoW(buf, entry.len);
146  break;
147  case 0x6:
148  TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
149  heap_free(chm->compiledFile);
150  chm->compiledFile = strdupnAtoW(buf, entry.len);
151  break;
152  case 0x9:
153  TRACE("Version is %s\n", debugstr_an(buf, entry.len));
154  break;
155  case 0xa:
156  TRACE("Time is %08x\n", *(DWORD*)buf);
157  break;
158  case 0xc:
159  TRACE("Number of info types: %d\n", *(DWORD*)buf);
160  break;
161  case 0xf:
162  TRACE("Check sum: %x\n", *(DWORD*)buf);
163  break;
164  default:
165  TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
166  }
167  }
168 
169  heap_free(buf);
170  IStream_Release(stream);
171 
172  return SUCCEEDED(hres);
173 }
174 
176 {
177  IStream *ivb_stream;
178  DWORD size, read, i;
179  DWORD *buf;
180  LPCSTR ret = NULL;
181  HRESULT hres;
182 
183  static const WCHAR wszIVB[] = {'#','I','V','B',0};
184 
185  hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
186  if(FAILED(hres)) {
187  WARN("Could not open #IVB stream: %08x\n", hres);
188  return NULL;
189  }
190 
191  hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
192  if(FAILED(hres)) {
193  WARN("Read failed: %08x\n", hres);
194  IStream_Release(ivb_stream);
195  return NULL;
196  }
197 
198  buf = heap_alloc(size);
199  hres = IStream_Read(ivb_stream, buf, size, &read);
200  IStream_Release(ivb_stream);
201  if(FAILED(hres)) {
202  WARN("Read failed: %08x\n", hres);
203  heap_free(buf);
204  return NULL;
205  }
206 
207  size /= 2*sizeof(DWORD);
208 
209  for(i=0; i<size; i++) {
210  if(buf[2*i] == index) {
211  ret = GetChmString(chm, buf[2*i+1]);
212  break;
213  }
214  }
215 
216  heap_free(buf);
217 
218  TRACE("returning %s\n", debugstr_a(ret));
219  return strdupAtoW(ret);
220 }
221 
222 /*
223  * Tests if the file <chmfile>.<ext> exists, used for loading Indices, Table of Contents, etc.
224  * when these files are not available from the HH_WINTYPE structure.
225  */
226 static WCHAR *FindHTMLHelpSetting(HHInfo *info, const WCHAR *extW)
227 {
228  static const WCHAR periodW[] = {'.',0};
229  IStorage *pStorage = info->pCHMInfo->pStorage;
230  IStream *pStream;
231  WCHAR *filename;
232  HRESULT hr;
233 
234  filename = heap_alloc( (lstrlenW(info->pCHMInfo->compiledFile)
235  + lstrlenW(periodW) + lstrlenW(extW) + 1) * sizeof(WCHAR) );
236  lstrcpyW(filename, info->pCHMInfo->compiledFile);
237  lstrcatW(filename, periodW);
238  lstrcatW(filename, extW);
239  hr = IStorage_OpenStream(pStorage, filename, NULL, STGM_READ, 0, &pStream);
240  if (FAILED(hr))
241  {
243  return strdupAtoW("");
244  }
245  IStream_Release(pStream);
246  return filename;
247 }
248 
250 {
251  if(*dst == NULL)
252  *dst = strdupW(src);
253  return *dst;
254 }
255 
257 {
258  DWORD unhandled_params = src->fsValidMembers & ~(HHWIN_PARAM_PROPERTIES|HHWIN_PARAM_STYLES
263  HH_WINTYPEW *dst = &info->WinType;
264  DWORD merge = override ? src->fsValidMembers : src->fsValidMembers & ~dst->fsValidMembers;
265 
266  if (unhandled_params)
267  FIXME("Unsupported fsValidMembers fields: 0x%x\n", unhandled_params);
268 
269  dst->fsValidMembers |= merge;
270  if (dst->cbStruct == 0)
271  {
272  /* If the structure has not been filled in yet then use all of the values */
273  dst->cbStruct = sizeof(HH_WINTYPEW);
274  merge = ~0;
275  }
276  if (merge & HHWIN_PARAM_PROPERTIES) dst->fsWinProperties = src->fsWinProperties;
277  if (merge & HHWIN_PARAM_STYLES) dst->dwStyles = src->dwStyles;
278  if (merge & HHWIN_PARAM_EXSTYLES) dst->dwExStyles = src->dwExStyles;
279  if (merge & HHWIN_PARAM_RECT) dst->rcWindowPos = src->rcWindowPos;
280  if (merge & HHWIN_PARAM_NAV_WIDTH) dst->iNavWidth = src->iNavWidth;
281  if (merge & HHWIN_PARAM_SHOWSTATE) dst->nShowState = src->nShowState;
282  if (merge & HHWIN_PARAM_INFOTYPES) dst->paInfoTypes = src->paInfoTypes;
283  if (merge & HHWIN_PARAM_TB_FLAGS) dst->fsToolBarFlags = src->fsToolBarFlags;
284  if (merge & HHWIN_PARAM_EXPANSION) dst->fNotExpanded = src->fNotExpanded;
285  if (merge & HHWIN_PARAM_TABPOS) dst->tabpos = src->tabpos;
286  if (merge & HHWIN_PARAM_TABORDER) memcpy(dst->tabOrder, src->tabOrder, sizeof(src->tabOrder));
287  if (merge & HHWIN_PARAM_HISTORY_COUNT) dst->cHistory = src->cHistory;
288  if (merge & HHWIN_PARAM_CUR_TAB) dst->curNavType = src->curNavType;
289 
290  /*
291  * Note: We assume that hwndHelp, hwndCaller, hwndToolBar, hwndNavigation, and hwndHTML cannot be
292  * modified by the user. rcHTML and rcMinSize are not currently supported, so don't bother to copy them.
293  */
294 
295  dst->pszType = MergeChmString(src->pszType, &info->stringsW.pszType);
296  dst->pszFile = MergeChmString(src->pszFile, &info->stringsW.pszFile);
297  dst->pszToc = MergeChmString(src->pszToc, &info->stringsW.pszToc);
298  dst->pszIndex = MergeChmString(src->pszIndex, &info->stringsW.pszIndex);
299  dst->pszCaption = MergeChmString(src->pszCaption, &info->stringsW.pszCaption);
300  dst->pszHome = MergeChmString(src->pszHome, &info->stringsW.pszHome);
301  dst->pszJump1 = MergeChmString(src->pszJump1, &info->stringsW.pszJump1);
302  dst->pszJump2 = MergeChmString(src->pszJump2, &info->stringsW.pszJump2);
303  dst->pszUrlJump1 = MergeChmString(src->pszUrlJump1, &info->stringsW.pszUrlJump1);
304  dst->pszUrlJump2 = MergeChmString(src->pszUrlJump2, &info->stringsW.pszUrlJump2);
305 
306  /* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
307  * work in this case
308  */
309 #if 0
310  dst->pszCustomTabs = MergeChmString(src->pszCustomTabs, &info->pszCustomTabs);
311 #endif
312 }
313 
314 static inline WCHAR *ConvertChmString(HHInfo *info, DWORD id)
315 {
316  WCHAR *ret = NULL;
317 
318  if(id)
319  ret = strdupAtoW(GetChmString(info->pCHMInfo, id));
320  return ret;
321 }
322 
323 static inline void wintype_free(HH_WINTYPEW *wintype)
324 {
325  heap_free((void *)wintype->pszType);
326  heap_free((void *)wintype->pszCaption);
327  heap_free(wintype->paInfoTypes);
328  heap_free((void *)wintype->pszToc);
329  heap_free((void *)wintype->pszIndex);
330  heap_free((void *)wintype->pszFile);
331  heap_free((void *)wintype->pszHome);
332  heap_free((void *)wintype->pszJump1);
333  heap_free((void *)wintype->pszJump2);
334  heap_free((void *)wintype->pszUrlJump1);
335  heap_free((void *)wintype->pszUrlJump2);
336  heap_free((void *)wintype->pszCustomTabs);
337 }
338 
339 /* Loads the HH_WINTYPE data from the CHM file
340  *
341  * FIXME: There may be more than one window type in the file, so
342  * add the ability to choose a certain window type
343  */
345 {
346  LARGE_INTEGER liOffset;
347  IStorage *pStorage = info->pCHMInfo->pStorage;
348  IStream *pStream = NULL;
349  HH_WINTYPEW wintype;
350  HRESULT hr;
351  DWORD cbRead;
352  BOOL ret = FALSE;
353 
354  static const WCHAR empty[] = {0};
355  static const WCHAR toc_extW[] = {'h','h','c',0};
356  static const WCHAR index_extW[] = {'h','h','k',0};
357  static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
358 
359  /* HH_WINTYPE as stored on disk. It's identical to HH_WINTYPE except that the pointer fields
360  have been changed to DWORDs, so that the layout on 64-bit remains unchanged. */
361  struct file_wintype
362  {
363  int cbStruct;
364  BOOL fUniCodeStrings;
365  DWORD pszType;
366  DWORD fsValidMembers;
367  DWORD fsWinProperties;
368  DWORD pszCaption;
369  DWORD dwStyles;
370  DWORD dwExStyles;
371  RECT rcWindowPos;
372  int nShowState;
373  DWORD hwndHelp;
374  DWORD hwndCaller;
375  DWORD paInfoTypes;
376  DWORD hwndToolBar;
377  DWORD hwndNavigation;
378  DWORD hwndHTML;
379  int iNavWidth;
380  RECT rcHTML;
381  DWORD pszToc;
382  DWORD pszIndex;
383  DWORD pszFile;
384  DWORD pszHome;
385  DWORD fsToolBarFlags;
386  BOOL fNotExpanded;
387  int curNavType;
388  int tabpos;
389  int idNotify;
390  BYTE tabOrder[HH_MAX_TABS+1];
391  int cHistory;
392  DWORD pszJump1;
393  DWORD pszJump2;
394  DWORD pszUrlJump1;
395  DWORD pszUrlJump2;
396  RECT rcMinSize;
397  int cbInfoTypes;
398  DWORD pszCustomTabs;
399  } file_wintype;
400 
401  memset(&wintype, 0, sizeof(wintype));
402  wintype.cbStruct = sizeof(wintype);
403  wintype.fUniCodeStrings = TRUE;
404 
405  hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
406  if (SUCCEEDED(hr))
407  {
408  /* jump past the #WINDOWS header */
409  liOffset.QuadPart = sizeof(DWORD) * 2;
410 
411  hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
412  if (FAILED(hr)) goto done;
413 
414  /* read the HH_WINTYPE struct data */
415  hr = IStream_Read(pStream, &file_wintype, sizeof(file_wintype), &cbRead);
416  if (FAILED(hr)) goto done;
417 
418  /* convert the #STRINGS offsets to actual strings */
419  wintype.pszType = ConvertChmString(info, file_wintype.pszType);
420  wintype.fsValidMembers = file_wintype.fsValidMembers;
421  wintype.fsWinProperties = file_wintype.fsWinProperties;
422  wintype.pszCaption = ConvertChmString(info, file_wintype.pszCaption);
423  wintype.dwStyles = file_wintype.dwStyles;
424  wintype.dwExStyles = file_wintype.dwExStyles;
425  wintype.rcWindowPos = file_wintype.rcWindowPos;
426  wintype.nShowState = file_wintype.nShowState;
427  wintype.iNavWidth = file_wintype.iNavWidth;
428  wintype.rcHTML = file_wintype.rcHTML;
429  wintype.pszToc = ConvertChmString(info, file_wintype.pszToc);
430  wintype.pszIndex = ConvertChmString(info, file_wintype.pszIndex);
431  wintype.pszFile = ConvertChmString(info, file_wintype.pszFile);
432  wintype.pszHome = ConvertChmString(info, file_wintype.pszHome);
433  wintype.fsToolBarFlags = file_wintype.fsToolBarFlags;
434  wintype.fNotExpanded = file_wintype.fNotExpanded;
435  wintype.curNavType = file_wintype.curNavType;
436  wintype.tabpos = file_wintype.tabpos;
437  wintype.idNotify = file_wintype.idNotify;
438  memcpy(&wintype.tabOrder, file_wintype.tabOrder, sizeof(wintype.tabOrder));
439  wintype.cHistory = file_wintype.cHistory;
440  wintype.pszJump1 = ConvertChmString(info, file_wintype.pszJump1);
441  wintype.pszJump2 = ConvertChmString(info, file_wintype.pszJump2);
442  wintype.pszUrlJump1 = ConvertChmString(info, file_wintype.pszUrlJump1);
443  wintype.pszUrlJump2 = ConvertChmString(info, file_wintype.pszUrlJump2);
444  wintype.rcMinSize = file_wintype.rcMinSize;
445  wintype.cbInfoTypes = file_wintype.cbInfoTypes;
446  }
447  else
448  {
449  /* no defined window types so use (hopefully) sane defaults */
450  static const WCHAR defaultwinW[] = {'d','e','f','a','u','l','t','w','i','n','\0'};
451  wintype.pszType = strdupW(info->pCHMInfo->defWindow ? info->pCHMInfo->defWindow : defaultwinW);
452  wintype.pszToc = strdupW(info->pCHMInfo->defToc ? info->pCHMInfo->defToc : empty);
453  wintype.pszIndex = strdupW(empty);
454  wintype.fsValidMembers = 0;
456  wintype.dwStyles = WS_POPUP;
457  wintype.dwExStyles = 0;
458  wintype.nShowState = SW_SHOW;
459  wintype.curNavType = HHWIN_NAVTYPE_TOC;
460  }
461 
462  /* merge the new data with any pre-existing HH_WINTYPE structure */
463  MergeChmProperties(&wintype, info, FALSE);
464  if (!info->WinType.pszCaption)
465 #ifdef __REACTOS__
466  info->WinType.pszCaption = info->stringsW.pszCaption = (info->pCHMInfo->defTitle ? strdupW(info->pCHMInfo->defTitle) : HH_LoadString(IDS_DEFTITLE));
467 #else
468  info->WinType.pszCaption = info->stringsW.pszCaption = strdupW(info->pCHMInfo->defTitle ? info->pCHMInfo->defTitle : empty);
469 #endif
470  if (!info->WinType.pszFile)
471  info->WinType.pszFile = info->stringsW.pszFile = strdupW(info->pCHMInfo->defTopic ? info->pCHMInfo->defTopic : empty);
472  if (!info->WinType.pszToc)
473  info->WinType.pszToc = info->stringsW.pszToc = FindHTMLHelpSetting(info, toc_extW);
474  if (!info->WinType.pszIndex)
475  info->WinType.pszIndex = info->stringsW.pszIndex = FindHTMLHelpSetting(info, index_extW);
476 
477  wintype_free(&wintype);
478  ret = TRUE;
479 
480 done:
481  if (pStream)
482  IStream_Release(pStream);
483 
484  return ret;
485 }
486 
488 {
489  static const WCHAR its_schema[] = {'i','t','s',':'};
490  static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
491  static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
492 
493  if(!_wcsnicmp(its_schema, url, ARRAY_SIZE(its_schema)))
494  return url + ARRAY_SIZE(its_schema);
495  if(!_wcsnicmp(msits_schema, url, ARRAY_SIZE(msits_schema)))
496  return url + ARRAY_SIZE(msits_schema);
497  if(!_wcsnicmp(mk_schema, url, ARRAY_SIZE(mk_schema)))
498  return url + ARRAY_SIZE(mk_schema);
499 
500  return url;
501 }
502 
504 {
505  LPCWSTR ptr;
506  static const WCHAR separatorW[] = {':',':',0};
507 
508  path = skip_schema(path);
509 
511  if(ptr) {
512  WCHAR chm_file[MAX_PATH];
513  WCHAR rel_path[MAX_PATH];
514  WCHAR base_path[MAX_PATH];
515  LPWSTR p;
516 
517  lstrcpyW(base_path, base_file);
518  p = wcsrchr(base_path, '\\');
519  if(p)
520  *p = 0;
521 
522  memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
523  rel_path[ptr-path] = 0;
524 
525  PathCombineW(chm_file, base_path, rel_path);
526 
527  file->chm_file = strdupW(chm_file);
528  ptr += 2;
529  }else {
530  file->chm_file = strdupW(base_file);
531  ptr = path;
532  }
533 
534  file->chm_index = strdupW(ptr);
535 
536  TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
537 }
538 
539 IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
540 {
541  IStorage *storage;
542  IStream *stream = NULL;
543  HRESULT hres;
544 
545  TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
546  debugstr_w(chm_file->chm_index));
547 
548  if(parent_chm || chm_file->chm_file) {
549  hres = IITStorage_StgOpenStorage(info->pITStorage,
550  chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
551  STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
552  if(FAILED(hres)) {
553  WARN("Could not open storage: %08x\n", hres);
554  return NULL;
555  }
556  }else {
557  storage = info->pStorage;
558  IStorage_AddRef(info->pStorage);
559  }
560 
561  hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
562  IStorage_Release(storage);
563  if(FAILED(hres))
564  WARN("Could not open stream: %08x\n", hres);
565 
566  return stream;
567 }
568 
569 /*
570  * Retrieve a CHM document and parse the data from the <title> element to get the document's title.
571  */
573 {
574  strbuf_t node, node_name, content;
575  WCHAR *document_title = NULL;
576  IStream *str = NULL;
577  IStorage *storage;
579  HRESULT hres;
580 
581  TRACE("%s\n", debugstr_w(document));
582 
583  storage = info->pStorage;
584  if(!storage) {
585  WARN("Could not open storage to obtain the title for a document.\n");
586  return NULL;
587  }
588  IStorage_AddRef(storage);
589 
590  hres = IStorage_OpenStream(storage, document, NULL, STGM_READ, 0, &str);
591  IStorage_Release(storage);
592  if(FAILED(hres))
593  WARN("Could not open stream: %08x\n", hres);
594 
596  strbuf_init(&node);
598  strbuf_init(&node_name);
599 
600  while(next_node(&stream, &node)) {
601  get_node_name(&node, &node_name);
602 
603  TRACE("%s\n", node.buf);
604 
605  if(!_strnicmp(node_name.buf, "title", -1)) {
606  if(next_content(&stream, &content) && content.len > 1)
607  {
608  document_title = strdupnAtoW(&content.buf[1], content.len-1);
609  FIXME("magic: %s\n", debugstr_w(document_title));
610  break;
611  }
612  }
613 
614  strbuf_zero(&node);
615  }
616 
617  strbuf_free(&node);
619  strbuf_free(&node_name);
620  IStream_Release(str);
621 
622  return document_title;
623 }
624 
625 /* Opens the CHM file for reading */
627 {
628  HRESULT hres;
629  CHMInfo *ret;
630 
631  static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
632 
633  if (!(ret = heap_alloc_zero(sizeof(CHMInfo))))
634  return NULL;
635  ret->codePage = CP_ACP;
636 
637  if (!(ret->szFile = strdupW(szFile))) {
638  heap_free(ret);
639  return NULL;
640  }
641 
642  hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
643  &IID_IITStorage, (void **) &ret->pITStorage) ;
644  if(FAILED(hres)) {
645  WARN("Could not create ITStorage: %08x\n", hres);
646  return CloseCHM(ret);
647  }
648 
649  hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
650  STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
651  if(FAILED(hres)) {
652  WARN("Could not open storage: %08x\n", hres);
653  return CloseCHM(ret);
654  }
655  hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
656  &ret->strings_stream);
657  if(FAILED(hres)) {
658  WARN("Could not open #STRINGS stream: %08x\n", hres);
659  /* It's not critical, so we pass */
660  }
661 
662  if(!ReadChmSystem(ret)) {
663  WARN("Could not read #SYSTEM\n");
664  return CloseCHM(ret);
665  }
666 
667  return ret;
668 }
669 
671 {
672  if(chm->pITStorage)
673  IITStorage_Release(chm->pITStorage);
674 
675  if(chm->pStorage)
676  IStorage_Release(chm->pStorage);
677 
678  if(chm->strings_stream)
679  IStream_Release(chm->strings_stream);
680 
681  if(chm->strings_size) {
682  DWORD i;
683 
684  for(i=0; i<chm->strings_size; i++)
685  heap_free(chm->strings[i]);
686  }
687 
688  heap_free(chm->strings);
689  heap_free(chm->defWindow);
690  heap_free(chm->defTitle);
691  heap_free(chm->defTopic);
692  heap_free(chm->defToc);
693  heap_free(chm->szFile);
694  heap_free(chm->compiledFile);
695  heap_free(chm);
696 
697  return NULL;
698 }
DWORD fsValidMembers
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