ReactOS  0.4.14-dev-55-g2da92ac
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 
25 #include "winreg.h"
26 #include "shlwapi.h"
27 #include "wine/debug.h"
28 
30 
31 /* Reads a string from the #STRINGS section in the CHM file */
33 {
34  LPCSTR str;
35 
36  if(!chm->strings_stream)
37  return NULL;
38 
39  if(chm->strings_size <= (offset >> BLOCK_BITS)) {
40  chm->strings_size = (offset >> BLOCK_BITS)+1;
41  if(chm->strings)
42  chm->strings = heap_realloc_zero(chm->strings,
43  chm->strings_size*sizeof(char*));
44  else
45  chm->strings = heap_alloc_zero(
46  chm->strings_size*sizeof(char*));
47 
48  }
49 
50  if(!chm->strings[offset >> BLOCK_BITS]) {
52  DWORD read;
53  HRESULT hres;
54 
55  pos.QuadPart = offset & ~BLOCK_MASK;
56  hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
57  if(FAILED(hres)) {
58  WARN("Seek failed: %08x\n", hres);
59  return NULL;
60  }
61 
63 
64  hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
65  BLOCK_SIZE, &read);
66  if(FAILED(hres)) {
67  WARN("Read failed: %08x\n", hres);
69  chm->strings[offset >> BLOCK_BITS] = NULL;
70  return NULL;
71  }
72  }
73 
74  str = chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
75  TRACE("offset %#x => %s\n", offset, debugstr_a(str));
76  return str;
77 }
78 
80 {
81  IStream *stream;
82  DWORD ver=0xdeadbeef, read, buf_size;
83  char *buf;
84  HRESULT hres;
85 
86  struct {
87  WORD code;
88  WORD len;
89  } entry;
90 
91  static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
92 
93  hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
94  if(FAILED(hres)) {
95  WARN("Could not open #SYSTEM stream: %08x\n", hres);
96  return FALSE;
97  }
98 
99  IStream_Read(stream, &ver, sizeof(ver), &read);
100  TRACE("version is %x\n", ver);
101 
102  buf = heap_alloc(8*sizeof(DWORD));
103  buf_size = 8*sizeof(DWORD);
104 
105  while(1) {
106  hres = IStream_Read(stream, &entry, sizeof(entry), &read);
107  if(hres != S_OK)
108  break;
109 
110  if(entry.len > buf_size)
111  buf = heap_realloc(buf, buf_size=entry.len);
112 
113  hres = IStream_Read(stream, buf, entry.len, &read);
114  if(hres != S_OK)
115  break;
116 
117  switch(entry.code) {
118  case 0x0:
119  TRACE("TOC is %s\n", debugstr_an(buf, entry.len));
120  heap_free(chm->defToc);
121  chm->defToc = strdupnAtoW(buf, entry.len);
122  break;
123  case 0x2:
124  TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
125  heap_free(chm->defTopic);
126  chm->defTopic = strdupnAtoW(buf, entry.len);
127  break;
128  case 0x3:
129  TRACE("Title is %s\n", debugstr_an(buf, entry.len));
130  heap_free(chm->defTitle);
131  chm->defTitle = strdupnAtoW(buf, entry.len);
132  break;
133  case 0x4:
134  /* TODO: Currently only the Locale ID is loaded from this field */
135  TRACE("Locale is: %d\n", *(LCID*)&buf[0]);
136  if(!GetLocaleInfoW(*(LCID*)&buf[0], LOCALE_IDEFAULTANSICODEPAGE|LOCALE_RETURN_NUMBER,
137  (WCHAR *)&chm->codePage, sizeof(chm->codePage)/sizeof(WCHAR)))
138  chm->codePage = CP_ACP;
139  break;
140  case 0x5:
141  TRACE("Window name is %s\n", debugstr_an(buf, entry.len));
142  chm->defWindow = strdupnAtoW(buf, entry.len);
143  break;
144  case 0x6:
145  TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
146  heap_free(chm->compiledFile);
147  chm->compiledFile = strdupnAtoW(buf, entry.len);
148  break;
149  case 0x9:
150  TRACE("Version is %s\n", debugstr_an(buf, entry.len));
151  break;
152  case 0xa:
153  TRACE("Time is %08x\n", *(DWORD*)buf);
154  break;
155  case 0xc:
156  TRACE("Number of info types: %d\n", *(DWORD*)buf);
157  break;
158  case 0xf:
159  TRACE("Check sum: %x\n", *(DWORD*)buf);
160  break;
161  default:
162  TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
163  }
164  }
165 
166  heap_free(buf);
167  IStream_Release(stream);
168 
169  return SUCCEEDED(hres);
170 }
171 
173 {
174  IStream *ivb_stream;
175  DWORD size, read, i;
176  DWORD *buf;
177  LPCSTR ret = NULL;
178  HRESULT hres;
179 
180  static const WCHAR wszIVB[] = {'#','I','V','B',0};
181 
182  hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
183  if(FAILED(hres)) {
184  WARN("Could not open #IVB stream: %08x\n", hres);
185  return NULL;
186  }
187 
188  hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
189  if(FAILED(hres)) {
190  WARN("Read failed: %08x\n", hres);
191  IStream_Release(ivb_stream);
192  return NULL;
193  }
194 
195  buf = heap_alloc(size);
196  hres = IStream_Read(ivb_stream, buf, size, &read);
197  IStream_Release(ivb_stream);
198  if(FAILED(hres)) {
199  WARN("Read failed: %08x\n", hres);
200  heap_free(buf);
201  return NULL;
202  }
203 
204  size /= 2*sizeof(DWORD);
205 
206  for(i=0; i<size; i++) {
207  if(buf[2*i] == index) {
208  ret = GetChmString(chm, buf[2*i+1]);
209  break;
210  }
211  }
212 
213  heap_free(buf);
214 
215  TRACE("returning %s\n", debugstr_a(ret));
216  return strdupAtoW(ret);
217 }
218 
219 /*
220  * Tests if the file <chmfile>.<ext> exists, used for loading Indices, Table of Contents, etc.
221  * when these files are not available from the HH_WINTYPE structure.
222  */
223 static WCHAR *FindHTMLHelpSetting(HHInfo *info, const WCHAR *extW)
224 {
225  static const WCHAR periodW[] = {'.',0};
226  IStorage *pStorage = info->pCHMInfo->pStorage;
227  IStream *pStream;
228  WCHAR *filename;
229  HRESULT hr;
230 
231  filename = heap_alloc( (strlenW(info->pCHMInfo->compiledFile)
232  + strlenW(periodW) + strlenW(extW) + 1) * sizeof(WCHAR) );
233  strcpyW(filename, info->pCHMInfo->compiledFile);
234  strcatW(filename, periodW);
235  strcatW(filename, extW);
236  hr = IStorage_OpenStream(pStorage, filename, NULL, STGM_READ, 0, &pStream);
237  if (FAILED(hr))
238  {
240  return strdupAtoW("");
241  }
242  IStream_Release(pStream);
243  return filename;
244 }
245 
247 {
248  if(*dst == NULL)
249  *dst = strdupW(src);
250  return *dst;
251 }
252 
254 {
255  DWORD unhandled_params = src->fsValidMembers & ~(HHWIN_PARAM_PROPERTIES|HHWIN_PARAM_STYLES
260  HH_WINTYPEW *dst = &info->WinType;
261  DWORD merge = override ? src->fsValidMembers : src->fsValidMembers & ~dst->fsValidMembers;
262 
263  if (unhandled_params)
264  FIXME("Unsupported fsValidMembers fields: 0x%x\n", unhandled_params);
265 
266  dst->fsValidMembers |= merge;
267  if (dst->cbStruct == 0)
268  {
269  /* If the structure has not been filled in yet then use all of the values */
270  dst->cbStruct = sizeof(HH_WINTYPEW);
271  merge = ~0;
272  }
273  if (merge & HHWIN_PARAM_PROPERTIES) dst->fsWinProperties = src->fsWinProperties;
274  if (merge & HHWIN_PARAM_STYLES) dst->dwStyles = src->dwStyles;
275  if (merge & HHWIN_PARAM_EXSTYLES) dst->dwExStyles = src->dwExStyles;
276  if (merge & HHWIN_PARAM_RECT) dst->rcWindowPos = src->rcWindowPos;
277  if (merge & HHWIN_PARAM_NAV_WIDTH) dst->iNavWidth = src->iNavWidth;
278  if (merge & HHWIN_PARAM_SHOWSTATE) dst->nShowState = src->nShowState;
279  if (merge & HHWIN_PARAM_INFOTYPES) dst->paInfoTypes = src->paInfoTypes;
280  if (merge & HHWIN_PARAM_TB_FLAGS) dst->fsToolBarFlags = src->fsToolBarFlags;
281  if (merge & HHWIN_PARAM_EXPANSION) dst->fNotExpanded = src->fNotExpanded;
282  if (merge & HHWIN_PARAM_TABPOS) dst->tabpos = src->tabpos;
283  if (merge & HHWIN_PARAM_TABORDER) memcpy(dst->tabOrder, src->tabOrder, sizeof(src->tabOrder));
284  if (merge & HHWIN_PARAM_HISTORY_COUNT) dst->cHistory = src->cHistory;
285  if (merge & HHWIN_PARAM_CUR_TAB) dst->curNavType = src->curNavType;
286 
287  /*
288  * Note: We assume that hwndHelp, hwndCaller, hwndToolBar, hwndNavigation, and hwndHTML cannot be
289  * modified by the user. rcHTML and rcMinSize are not currently supported, so don't bother to copy them.
290  */
291 
292  dst->pszType = MergeChmString(src->pszType, &info->stringsW.pszType);
293  dst->pszFile = MergeChmString(src->pszFile, &info->stringsW.pszFile);
294  dst->pszToc = MergeChmString(src->pszToc, &info->stringsW.pszToc);
295  dst->pszIndex = MergeChmString(src->pszIndex, &info->stringsW.pszIndex);
296  dst->pszCaption = MergeChmString(src->pszCaption, &info->stringsW.pszCaption);
297  dst->pszHome = MergeChmString(src->pszHome, &info->stringsW.pszHome);
298  dst->pszJump1 = MergeChmString(src->pszJump1, &info->stringsW.pszJump1);
299  dst->pszJump2 = MergeChmString(src->pszJump2, &info->stringsW.pszJump2);
300  dst->pszUrlJump1 = MergeChmString(src->pszUrlJump1, &info->stringsW.pszUrlJump1);
301  dst->pszUrlJump2 = MergeChmString(src->pszUrlJump2, &info->stringsW.pszUrlJump2);
302 
303  /* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
304  * work in this case
305  */
306 #if 0
307  dst->pszCustomTabs = MergeChmString(src->pszCustomTabs, &info->pszCustomTabs);
308 #endif
309 }
310 
311 static inline WCHAR *ConvertChmString(HHInfo *info, DWORD id)
312 {
313  WCHAR *ret = NULL;
314 
315  if(id)
316  ret = strdupAtoW(GetChmString(info->pCHMInfo, id));
317  return ret;
318 }
319 
320 static inline void wintype_free(HH_WINTYPEW *wintype)
321 {
322  heap_free((void *)wintype->pszType);
323  heap_free((void *)wintype->pszCaption);
324  heap_free(wintype->paInfoTypes);
325  heap_free((void *)wintype->pszToc);
326  heap_free((void *)wintype->pszIndex);
327  heap_free((void *)wintype->pszFile);
328  heap_free((void *)wintype->pszHome);
329  heap_free((void *)wintype->pszJump1);
330  heap_free((void *)wintype->pszJump2);
331  heap_free((void *)wintype->pszUrlJump1);
332  heap_free((void *)wintype->pszUrlJump2);
333  heap_free((void *)wintype->pszCustomTabs);
334 }
335 
336 /* Loads the HH_WINTYPE data from the CHM file
337  *
338  * FIXME: There may be more than one window type in the file, so
339  * add the ability to choose a certain window type
340  */
342 {
343  LARGE_INTEGER liOffset;
344  IStorage *pStorage = info->pCHMInfo->pStorage;
345  IStream *pStream = NULL;
346  HH_WINTYPEW wintype;
347  HRESULT hr;
348  DWORD cbRead;
349  BOOL ret = FALSE;
350 
351  static const WCHAR empty[] = {0};
352  static const WCHAR toc_extW[] = {'h','h','c',0};
353  static const WCHAR index_extW[] = {'h','h','k',0};
354  static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
355 
356  /* HH_WINTYPE as stored on disk. It's identical to HH_WINTYPE except that the pointer fields
357  have been changed to DWORDs, so that the layout on 64-bit remains unchanged. */
358  struct file_wintype
359  {
360  int cbStruct;
361  BOOL fUniCodeStrings;
362  DWORD pszType;
363  DWORD fsValidMembers;
364  DWORD fsWinProperties;
365  DWORD pszCaption;
366  DWORD dwStyles;
367  DWORD dwExStyles;
368  RECT rcWindowPos;
369  int nShowState;
370  DWORD hwndHelp;
371  DWORD hwndCaller;
372  DWORD paInfoTypes;
373  DWORD hwndToolBar;
374  DWORD hwndNavigation;
375  DWORD hwndHTML;
376  int iNavWidth;
377  RECT rcHTML;
378  DWORD pszToc;
379  DWORD pszIndex;
380  DWORD pszFile;
381  DWORD pszHome;
382  DWORD fsToolBarFlags;
383  BOOL fNotExpanded;
384  int curNavType;
385  int tabpos;
386  int idNotify;
387  BYTE tabOrder[HH_MAX_TABS+1];
388  int cHistory;
389  DWORD pszJump1;
390  DWORD pszJump2;
391  DWORD pszUrlJump1;
392  DWORD pszUrlJump2;
393  RECT rcMinSize;
394  int cbInfoTypes;
395  DWORD pszCustomTabs;
396  } file_wintype;
397 
398  memset(&wintype, 0, sizeof(wintype));
399  wintype.cbStruct = sizeof(wintype);
400  wintype.fUniCodeStrings = TRUE;
401 
402  hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
403  if (SUCCEEDED(hr))
404  {
405  /* jump past the #WINDOWS header */
406  liOffset.QuadPart = sizeof(DWORD) * 2;
407 
408  hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
409  if (FAILED(hr)) goto done;
410 
411  /* read the HH_WINTYPE struct data */
412  hr = IStream_Read(pStream, &file_wintype, sizeof(file_wintype), &cbRead);
413  if (FAILED(hr)) goto done;
414 
415  /* convert the #STRINGS offsets to actual strings */
416  wintype.pszType = ConvertChmString(info, file_wintype.pszType);
417  wintype.fsValidMembers = file_wintype.fsValidMembers;
418  wintype.fsWinProperties = file_wintype.fsWinProperties;
419  wintype.pszCaption = ConvertChmString(info, file_wintype.pszCaption);
420  wintype.dwStyles = file_wintype.dwStyles;
421  wintype.dwExStyles = file_wintype.dwExStyles;
422  wintype.rcWindowPos = file_wintype.rcWindowPos;
423  wintype.nShowState = file_wintype.nShowState;
424  wintype.iNavWidth = file_wintype.iNavWidth;
425  wintype.rcHTML = file_wintype.rcHTML;
426  wintype.pszToc = ConvertChmString(info, file_wintype.pszToc);
427  wintype.pszIndex = ConvertChmString(info, file_wintype.pszIndex);
428  wintype.pszFile = ConvertChmString(info, file_wintype.pszFile);
429  wintype.pszHome = ConvertChmString(info, file_wintype.pszHome);
430  wintype.fsToolBarFlags = file_wintype.fsToolBarFlags;
431  wintype.fNotExpanded = file_wintype.fNotExpanded;
432  wintype.curNavType = file_wintype.curNavType;
433  wintype.tabpos = file_wintype.tabpos;
434  wintype.idNotify = file_wintype.idNotify;
435  memcpy(&wintype.tabOrder, file_wintype.tabOrder, sizeof(wintype.tabOrder));
436  wintype.cHistory = file_wintype.cHistory;
437  wintype.pszJump1 = ConvertChmString(info, file_wintype.pszJump1);
438  wintype.pszJump2 = ConvertChmString(info, file_wintype.pszJump2);
439  wintype.pszUrlJump1 = ConvertChmString(info, file_wintype.pszUrlJump1);
440  wintype.pszUrlJump2 = ConvertChmString(info, file_wintype.pszUrlJump2);
441  wintype.rcMinSize = file_wintype.rcMinSize;
442  wintype.cbInfoTypes = file_wintype.cbInfoTypes;
443  }
444  else
445  {
446  /* no defined window types so use (hopefully) sane defaults */
447  static const WCHAR defaultwinW[] = {'d','e','f','a','u','l','t','w','i','n','\0'};
448  wintype.pszType = strdupW(info->pCHMInfo->defWindow ? info->pCHMInfo->defWindow : defaultwinW);
449  wintype.pszToc = strdupW(info->pCHMInfo->defToc ? info->pCHMInfo->defToc : empty);
450  wintype.pszIndex = strdupW(empty);
451  wintype.fsValidMembers = 0;
453  wintype.dwStyles = WS_POPUP;
454  wintype.dwExStyles = 0;
455  wintype.nShowState = SW_SHOW;
456  wintype.curNavType = HHWIN_NAVTYPE_TOC;
457  }
458 
459  /* merge the new data with any pre-existing HH_WINTYPE structure */
460  MergeChmProperties(&wintype, info, FALSE);
461  if (!info->WinType.pszCaption)
462  info->WinType.pszCaption = info->stringsW.pszCaption = strdupW(info->pCHMInfo->defTitle ? info->pCHMInfo->defTitle : empty);
463  if (!info->WinType.pszFile)
464  info->WinType.pszFile = info->stringsW.pszFile = strdupW(info->pCHMInfo->defTopic ? info->pCHMInfo->defTopic : empty);
465  if (!info->WinType.pszToc)
466  info->WinType.pszToc = info->stringsW.pszToc = FindHTMLHelpSetting(info, toc_extW);
467  if (!info->WinType.pszIndex)
468  info->WinType.pszIndex = info->stringsW.pszIndex = FindHTMLHelpSetting(info, index_extW);
469 
470  wintype_free(&wintype);
471  ret = TRUE;
472 
473 done:
474  if (pStream)
475  IStream_Release(pStream);
476 
477  return ret;
478 }
479 
481 {
482  static const WCHAR its_schema[] = {'i','t','s',':'};
483  static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
484  static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
485 
486  if(!strncmpiW(its_schema, url, ARRAY_SIZE(its_schema)))
487  return url + ARRAY_SIZE(its_schema);
488  if(!strncmpiW(msits_schema, url, ARRAY_SIZE(msits_schema)))
489  return url + ARRAY_SIZE(msits_schema);
490  if(!strncmpiW(mk_schema, url, ARRAY_SIZE(mk_schema)))
491  return url + ARRAY_SIZE(mk_schema);
492 
493  return url;
494 }
495 
497 {
498  LPCWSTR ptr;
499  static const WCHAR separatorW[] = {':',':',0};
500 
501  path = skip_schema(path);
502 
504  if(ptr) {
505  WCHAR chm_file[MAX_PATH];
506  WCHAR rel_path[MAX_PATH];
507  WCHAR base_path[MAX_PATH];
508  LPWSTR p;
509 
510  strcpyW(base_path, base_file);
511  p = strrchrW(base_path, '\\');
512  if(p)
513  *p = 0;
514 
515  memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
516  rel_path[ptr-path] = 0;
517 
518  PathCombineW(chm_file, base_path, rel_path);
519 
520  file->chm_file = strdupW(chm_file);
521  ptr += 2;
522  }else {
523  file->chm_file = strdupW(base_file);
524  ptr = path;
525  }
526 
527  file->chm_index = strdupW(ptr);
528 
529  TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
530 }
531 
532 IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
533 {
534  IStorage *storage;
535  IStream *stream = NULL;
536  HRESULT hres;
537 
538  TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
539  debugstr_w(chm_file->chm_index));
540 
541  if(parent_chm || chm_file->chm_file) {
542  hres = IITStorage_StgOpenStorage(info->pITStorage,
543  chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
544  STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
545  if(FAILED(hres)) {
546  WARN("Could not open storage: %08x\n", hres);
547  return NULL;
548  }
549  }else {
550  storage = info->pStorage;
551  IStorage_AddRef(info->pStorage);
552  }
553 
554  hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
555  IStorage_Release(storage);
556  if(FAILED(hres))
557  WARN("Could not open stream: %08x\n", hres);
558 
559  return stream;
560 }
561 
562 /*
563  * Retrieve a CHM document and parse the data from the <title> element to get the document's title.
564  */
566 {
567  strbuf_t node, node_name, content;
568  WCHAR *document_title = NULL;
569  IStream *str = NULL;
570  IStorage *storage;
572  HRESULT hres;
573 
574  TRACE("%s\n", debugstr_w(document));
575 
576  storage = info->pStorage;
577  if(!storage) {
578  WARN("Could not open storage to obtain the title for a document.\n");
579  return NULL;
580  }
581  IStorage_AddRef(storage);
582 
583  hres = IStorage_OpenStream(storage, document, NULL, STGM_READ, 0, &str);
584  IStorage_Release(storage);
585  if(FAILED(hres))
586  WARN("Could not open stream: %08x\n", hres);
587 
589  strbuf_init(&node);
591  strbuf_init(&node_name);
592 
593  while(next_node(&stream, &node)) {
594  get_node_name(&node, &node_name);
595 
596  TRACE("%s\n", node.buf);
597 
598  if(!strcasecmp(node_name.buf, "title")) {
599  if(next_content(&stream, &content) && content.len > 1)
600  {
601  document_title = strdupnAtoW(&content.buf[1], content.len-1);
602  FIXME("magic: %s\n", debugstr_w(document_title));
603  break;
604  }
605  }
606 
607  strbuf_zero(&node);
608  }
609 
610  strbuf_free(&node);
612  strbuf_free(&node_name);
613  IStream_Release(str);
614 
615  return document_title;
616 }
617 
618 /* Opens the CHM file for reading */
620 {
621  HRESULT hres;
622  CHMInfo *ret;
623 
624  static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
625 
626  if (!(ret = heap_alloc_zero(sizeof(CHMInfo))))
627  return NULL;
628  ret->codePage = CP_ACP;
629 
630  if (!(ret->szFile = strdupW(szFile))) {
631  heap_free(ret);
632  return NULL;
633  }
634 
635  hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
636  &IID_IITStorage, (void **) &ret->pITStorage) ;
637  if(FAILED(hres)) {
638  WARN("Could not create ITStorage: %08x\n", hres);
639  return CloseCHM(ret);
640  }
641 
642  hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
643  STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
644  if(FAILED(hres)) {
645  WARN("Could not open storage: %08x\n", hres);
646  return CloseCHM(ret);
647  }
648  hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
649  &ret->strings_stream);
650  if(FAILED(hres)) {
651  WARN("Could not open #STRINGS stream: %08x\n", hres);
652  /* It's not critical, so we pass */
653  }
654 
655  if(!ReadChmSystem(ret)) {
656  WARN("Could not read #SYSTEM\n");
657  return CloseCHM(ret);
658  }
659 
660  return ret;
661 }
662 
664 {
665  if(chm->pITStorage)
666  IITStorage_Release(chm->pITStorage);
667 
668  if(chm->pStorage)
669  IStorage_Release(chm->pStorage);
670 
671  if(chm->strings_stream)
672  IStream_Release(chm->strings_stream);
673 
674  if(chm->strings_size) {
675  DWORD i;
676 
677  for(i=0; i<chm->strings_size; i++)
678  heap_free(chm->strings[i]);
679  }
680 
681  heap_free(chm->strings);
682  heap_free(chm->defWindow);
683  heap_free(chm->defTitle);
684  heap_free(chm->defTopic);
685  heap_free(chm->defToc);
686  heap_free(chm->szFile);
687  heap_free(chm->compiledFile);
688  heap_free(chm);
689 
690  return NULL;
691 }
DWORD fsValidMembers
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