4 * Copyright 2005 James Hawkins
5 * Copyright 2007 Jacek Caban
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.
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.
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
26 #include "wine/debug.h"
28 WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
31 #define BLOCK_SIZE (1 << BLOCK_BITS)
32 #define BLOCK_MASK (BLOCK_SIZE-1)
34 /* Reads a string from the #STRINGS section in the CHM file */
35 static LPCSTR GetChmString(CHMInfo *chm, DWORD offset)
37 if(!chm->strings_stream)
40 if(chm->strings_size <= (offset >> BLOCK_BITS)) {
42 chm->strings = heap_realloc_zero(chm->strings,
43 chm->strings_size = ((offset >> BLOCK_BITS)+1)*sizeof(char*));
45 chm->strings = heap_alloc_zero(
46 chm->strings_size = ((offset >> BLOCK_BITS)+1)*sizeof(char*));
50 if(!chm->strings[offset >> BLOCK_BITS]) {
55 pos.QuadPart = offset & ~BLOCK_MASK;
56 hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
58 WARN("Seek failed: %08x\n", hres);
62 chm->strings[offset >> BLOCK_BITS] = heap_alloc(BLOCK_SIZE);
64 hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
67 WARN("Read failed: %08x\n", hres);
68 heap_free(chm->strings[offset >> BLOCK_BITS]);
69 chm->strings[offset >> BLOCK_BITS] = NULL;
74 return chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
77 static BOOL ReadChmSystem(CHMInfo *chm)
80 DWORD ver=0xdeadbeef, read, buf_size;
89 static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
91 hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
93 WARN("Could not open #SYSTEM stream: %08x\n", hres);
97 IStream_Read(stream, &ver, sizeof(ver), &read);
98 TRACE("version is %x\n", ver);
100 buf = heap_alloc(8*sizeof(DWORD));
101 buf_size = 8*sizeof(DWORD);
104 hres = IStream_Read(stream, &entry, sizeof(entry), &read);
108 if(entry.len > buf_size)
109 buf = heap_realloc(buf, buf_size=entry.len);
111 hres = IStream_Read(stream, buf, entry.len, &read);
117 TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
120 TRACE("Title is %s\n", debugstr_an(buf, entry.len));
123 TRACE("Default window is %s\n", debugstr_an(buf, entry.len));
126 TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
129 TRACE("Version is %s\n", debugstr_an(buf, entry.len));
132 TRACE("Time is %08x\n", *(DWORD*)buf);
135 TRACE("Number of info types: %d\n", *(DWORD*)buf);
138 TRACE("Check sum: %x\n", *(DWORD*)buf);
141 TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
146 IStream_Release(stream);
148 return SUCCEEDED(hres);
151 LPWSTR FindContextAlias(CHMInfo *chm, DWORD index)
159 static const WCHAR wszIVB[] = {'#','I','V','B',0};
161 hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
163 WARN("Could not open #IVB stream: %08x\n", hres);
167 hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
169 WARN("Read failed: %08x\n", hres);
170 IStream_Release(ivb_stream);
174 buf = heap_alloc(size);
175 hres = IStream_Read(ivb_stream, buf, size, &read);
176 IStream_Release(ivb_stream);
178 WARN("Read failed: %08x\n", hres);
183 size /= 2*sizeof(DWORD);
185 for(i=0; i<size; i++) {
186 if(buf[2*i] == index) {
187 ret = GetChmString(chm, buf[2*i+1]);
194 TRACE("returning %s\n", debugstr_a(ret));
195 return strdupAtoW(ret);
198 /* Loads the HH_WINTYPE data from the CHM file
200 * FIXME: There may be more than one window type in the file, so
201 * add the ability to choose a certain window type
203 BOOL LoadWinTypeFromCHM(HHInfo *info)
205 LARGE_INTEGER liOffset;
206 IStorage *pStorage = info->pCHMInfo->pStorage;
211 static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
213 hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
217 /* jump past the #WINDOWS header */
218 liOffset.QuadPart = sizeof(DWORD) * 2;
220 hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
221 if (FAILED(hr)) goto done;
223 /* read the HH_WINTYPE struct data */
224 hr = IStream_Read(pStream, &info->WinType, sizeof(info->WinType), &cbRead);
225 if (FAILED(hr)) goto done;
227 /* convert the #STRINGS offsets to actual strings */
228 info->WinType.pszType = info->pszType = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszType));
229 info->WinType.pszCaption = info->pszCaption = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszCaption));
230 info->WinType.pszToc = info->pszToc = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszToc));
231 info->WinType.pszIndex = info->pszIndex = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszIndex));
232 info->WinType.pszFile = info->pszFile = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszFile));
233 info->WinType.pszHome = info->pszHome = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszHome));
234 info->WinType.pszJump1 = info->pszJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump1));
235 info->WinType.pszJump2 = info->pszJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump2));
236 info->WinType.pszUrlJump1 = info->pszUrlJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump1));
237 info->WinType.pszUrlJump2 = info->pszUrlJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump2));
239 /* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
243 info->WinType.pszCustomTabs = info->pszCustomTabs = CHM_ReadString(pChmInfo, (DWORD_PTR)info->WinType.pszCustomTabs);
247 IStream_Release(pStream);
249 return SUCCEEDED(hr);
252 static LPCWSTR skip_schema(LPCWSTR url)
254 static const WCHAR its_schema[] = {'i','t','s',':'};
255 static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
256 static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
258 if(!strncmpiW(its_schema, url, sizeof(its_schema)/sizeof(WCHAR)))
259 return url+sizeof(its_schema)/sizeof(WCHAR);
260 if(!strncmpiW(msits_schema, url, sizeof(msits_schema)/sizeof(WCHAR)))
261 return url+sizeof(msits_schema)/sizeof(WCHAR);
262 if(!strncmpiW(mk_schema, url, sizeof(mk_schema)/sizeof(WCHAR)))
263 return url+sizeof(mk_schema)/sizeof(WCHAR);
268 void SetChmPath(ChmPath *file, LPCWSTR base_file, LPCWSTR path)
271 static const WCHAR separatorW[] = {':',':',0};
273 path = skip_schema(path);
275 ptr = strstrW(path, separatorW);
277 WCHAR chm_file[MAX_PATH];
278 WCHAR rel_path[MAX_PATH];
279 WCHAR base_path[MAX_PATH];
282 strcpyW(base_path, base_file);
283 p = strrchrW(base_path, '\\');
287 memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
288 rel_path[ptr-path] = 0;
290 PathCombineW(chm_file, base_path, rel_path);
292 file->chm_file = strdupW(chm_file);
295 file->chm_file = strdupW(base_file);
299 file->chm_index = strdupW(ptr);
301 TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
304 IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
307 IStream *stream = NULL;
310 TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
311 debugstr_w(chm_file->chm_index));
313 if(parent_chm || chm_file->chm_file) {
314 hres = IITStorage_StgOpenStorage(info->pITStorage,
315 chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
316 STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
318 WARN("Could not open storage: %08x\n", hres);
322 storage = info->pStorage;
323 IStorage_AddRef(info->pStorage);
326 hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
327 IStorage_Release(storage);
329 WARN("Could not open stream: %08x\n", hres);
334 /* Opens the CHM file for reading */
335 CHMInfo *OpenCHM(LPCWSTR szFile)
337 WCHAR file[MAX_PATH] = {0};
341 static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
343 CHMInfo *ret = heap_alloc_zero(sizeof(CHMInfo));
345 res = GetFullPathNameW(szFile, sizeof(file)/sizeof(file[0]), file, NULL);
346 ret->szFile = strdupW(file);
348 hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
349 &IID_IITStorage, (void **) &ret->pITStorage) ;
351 WARN("Could not create ITStorage: %08x\n", hres);
352 return CloseCHM(ret);
355 hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
356 STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
358 WARN("Could not open storage: %08x\n", hres);
359 return CloseCHM(ret);
362 hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
363 &ret->strings_stream);
365 WARN("Could not open #STRINGS stream: %08x\n", hres);
366 return CloseCHM(ret);
369 if(!ReadChmSystem(ret)) {
370 WARN("Could not read #SYSTEM\n");
371 return CloseCHM(ret);
377 CHMInfo *CloseCHM(CHMInfo *chm)
380 IITStorage_Release(chm->pITStorage);
383 IStorage_Release(chm->pStorage);
385 if(chm->strings_stream)
386 IStream_Release(chm->strings_stream);
388 if(chm->strings_size) {
391 for(i=0; i<chm->strings_size; i++)
392 heap_free(chm->strings[i]);
395 heap_free(chm->strings);