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Sweden-Number/dlls/hhctrl.ocx/chm.c

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/*
* CHM Utility API
*
* Copyright 2005 James Hawkins
* Copyright 2007 Jacek Caban
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "hhctrl.h"
#include "winreg.h"
#include "shlwapi.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
#define BLOCK_BITS 12
#define BLOCK_SIZE (1 << BLOCK_BITS)
#define BLOCK_MASK (BLOCK_SIZE-1)
/* Reads a string from the #STRINGS section in the CHM file */
static LPCSTR GetChmString(CHMInfo *chm, DWORD offset)
{
if(!chm->strings_stream)
return NULL;
if(chm->strings_size <= (offset >> BLOCK_BITS)) {
if(chm->strings)
chm->strings = heap_realloc_zero(chm->strings,
chm->strings_size = ((offset >> BLOCK_BITS)+1)*sizeof(char*));
else
chm->strings = heap_alloc_zero(
chm->strings_size = ((offset >> BLOCK_BITS)+1)*sizeof(char*));
}
if(!chm->strings[offset >> BLOCK_BITS]) {
LARGE_INTEGER pos;
DWORD read;
HRESULT hres;
pos.QuadPart = offset & ~BLOCK_MASK;
hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
if(FAILED(hres)) {
WARN("Seek failed: %08x\n", hres);
return NULL;
}
chm->strings[offset >> BLOCK_BITS] = heap_alloc(BLOCK_SIZE);
hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
BLOCK_SIZE, &read);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
heap_free(chm->strings[offset >> BLOCK_BITS]);
chm->strings[offset >> BLOCK_BITS] = NULL;
return NULL;
}
}
return chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
}
static BOOL ReadChmSystem(CHMInfo *chm)
{
IStream *stream;
DWORD ver=0xdeadbeef, read, buf_size;
char *buf;
HRESULT hres;
struct {
WORD code;
WORD len;
} entry;
static const WCHAR wszSYSTEM[] = {'#','S','Y','S','T','E','M',0};
hres = IStorage_OpenStream(chm->pStorage, wszSYSTEM, NULL, STGM_READ, 0, &stream);
if(FAILED(hres)) {
WARN("Could not open #SYSTEM stream: %08x\n", hres);
return FALSE;
}
IStream_Read(stream, &ver, sizeof(ver), &read);
TRACE("version is %x\n", ver);
buf = heap_alloc(8*sizeof(DWORD));
buf_size = 8*sizeof(DWORD);
while(1) {
hres = IStream_Read(stream, &entry, sizeof(entry), &read);
if(hres != S_OK)
break;
if(entry.len > buf_size)
buf = heap_realloc(buf, buf_size=entry.len);
hres = IStream_Read(stream, buf, entry.len, &read);
if(hres != S_OK)
break;
switch(entry.code) {
case 0x2:
TRACE("Default topic is %s\n", debugstr_an(buf, entry.len));
break;
case 0x3:
TRACE("Title is %s\n", debugstr_an(buf, entry.len));
break;
case 0x5:
TRACE("Default window is %s\n", debugstr_an(buf, entry.len));
break;
case 0x6:
TRACE("Compiled file is %s\n", debugstr_an(buf, entry.len));
break;
case 0x9:
TRACE("Version is %s\n", debugstr_an(buf, entry.len));
break;
case 0xa:
TRACE("Time is %08x\n", *(DWORD*)buf);
break;
case 0xc:
TRACE("Number of info types: %d\n", *(DWORD*)buf);
break;
case 0xf:
TRACE("Check sum: %x\n", *(DWORD*)buf);
break;
default:
TRACE("unhandled code %x, size %x\n", entry.code, entry.len);
}
}
heap_free(buf);
IStream_Release(stream);
return SUCCEEDED(hres);
}
LPWSTR FindContextAlias(CHMInfo *chm, DWORD index)
{
IStream *ivb_stream;
DWORD size, read, i;
DWORD *buf;
LPCSTR ret = NULL;
HRESULT hres;
static const WCHAR wszIVB[] = {'#','I','V','B',0};
hres = IStorage_OpenStream(chm->pStorage, wszIVB, NULL, STGM_READ, 0, &ivb_stream);
if(FAILED(hres)) {
WARN("Could not open #IVB stream: %08x\n", hres);
return NULL;
}
hres = IStream_Read(ivb_stream, &size, sizeof(size), &read);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
IStream_Release(ivb_stream);
return NULL;
}
buf = heap_alloc(size);
hres = IStream_Read(ivb_stream, buf, size, &read);
IStream_Release(ivb_stream);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
heap_free(buf);
return NULL;
}
size /= 2*sizeof(DWORD);
for(i=0; i<size; i++) {
if(buf[2*i] == index) {
ret = GetChmString(chm, buf[2*i+1]);
break;
}
}
heap_free(buf);
TRACE("returning %s\n", debugstr_a(ret));
return strdupAtoW(ret);
}
/* Loads the HH_WINTYPE data from the CHM file
*
* FIXME: There may be more than one window type in the file, so
* add the ability to choose a certain window type
*/
BOOL LoadWinTypeFromCHM(HHInfo *info)
{
LARGE_INTEGER liOffset;
IStorage *pStorage = info->pCHMInfo->pStorage;
IStream *pStream;
HRESULT hr;
DWORD cbRead;
static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
if (FAILED(hr))
return FALSE;
/* jump past the #WINDOWS header */
liOffset.QuadPart = sizeof(DWORD) * 2;
hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto done;
/* read the HH_WINTYPE struct data */
hr = IStream_Read(pStream, &info->WinType, sizeof(info->WinType), &cbRead);
if (FAILED(hr)) goto done;
/* convert the #STRINGS offsets to actual strings */
info->WinType.pszType = info->pszType = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszType));
info->WinType.pszCaption = info->pszCaption = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszCaption));
info->WinType.pszToc = info->pszToc = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszToc));
info->WinType.pszIndex = info->pszIndex = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszIndex));
info->WinType.pszFile = info->pszFile = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszFile));
info->WinType.pszHome = info->pszHome = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszHome));
info->WinType.pszJump1 = info->pszJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump1));
info->WinType.pszJump2 = info->pszJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszJump2));
info->WinType.pszUrlJump1 = info->pszUrlJump1 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump1));
info->WinType.pszUrlJump2 = info->pszUrlJump2 = strdupAtoW(GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszUrlJump2));
/* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
* work in this case
*/
#if 0
info->WinType.pszCustomTabs = info->pszCustomTabs = CHM_ReadString(pChmInfo, (DWORD_PTR)info->WinType.pszCustomTabs);
#endif
done:
IStream_Release(pStream);
return SUCCEEDED(hr);
}
static LPCWSTR skip_schema(LPCWSTR url)
{
static const WCHAR its_schema[] = {'i','t','s',':'};
static const WCHAR msits_schema[] = {'m','s','-','i','t','s',':'};
static const WCHAR mk_schema[] = {'m','k',':','@','M','S','I','T','S','t','o','r','e',':'};
if(!strncmpiW(its_schema, url, sizeof(its_schema)/sizeof(WCHAR)))
return url+sizeof(its_schema)/sizeof(WCHAR);
if(!strncmpiW(msits_schema, url, sizeof(msits_schema)/sizeof(WCHAR)))
return url+sizeof(msits_schema)/sizeof(WCHAR);
if(!strncmpiW(mk_schema, url, sizeof(mk_schema)/sizeof(WCHAR)))
return url+sizeof(mk_schema)/sizeof(WCHAR);
return url;
}
void SetChmPath(ChmPath *file, LPCWSTR base_file, LPCWSTR path)
{
LPCWSTR ptr;
static const WCHAR separatorW[] = {':',':',0};
path = skip_schema(path);
ptr = strstrW(path, separatorW);
if(ptr) {
WCHAR chm_file[MAX_PATH];
WCHAR rel_path[MAX_PATH];
WCHAR base_path[MAX_PATH];
LPWSTR p;
strcpyW(base_path, base_file);
p = strrchrW(base_path, '\\');
if(p)
*p = 0;
memcpy(rel_path, path, (ptr-path)*sizeof(WCHAR));
rel_path[ptr-path] = 0;
PathCombineW(chm_file, base_path, rel_path);
file->chm_file = strdupW(chm_file);
ptr += 2;
}else {
file->chm_file = strdupW(base_file);
ptr = path;
}
file->chm_index = strdupW(ptr);
TRACE("ChmFile = {%s %s}\n", debugstr_w(file->chm_file), debugstr_w(file->chm_index));
}
IStream *GetChmStream(CHMInfo *info, LPCWSTR parent_chm, ChmPath *chm_file)
{
IStorage *storage;
IStream *stream;
HRESULT hres;
TRACE("%s (%s :: %s)\n", debugstr_w(parent_chm), debugstr_w(chm_file->chm_file),
debugstr_w(chm_file->chm_index));
if(parent_chm || chm_file->chm_file) {
hres = IITStorage_StgOpenStorage(info->pITStorage,
chm_file->chm_file ? chm_file->chm_file : parent_chm, NULL,
STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &storage);
if(FAILED(hres)) {
WARN("Could not open storage: %08x\n", hres);
return NULL;
}
}else {
storage = info->pStorage;
IStorage_AddRef(info->pStorage);
}
hres = IStorage_OpenStream(storage, chm_file->chm_index, NULL, STGM_READ, 0, &stream);
IStorage_Release(storage);
if(FAILED(hres))
WARN("Could not open stream: %08x\n", hres);
return stream;
}
/* Opens the CHM file for reading */
CHMInfo *OpenCHM(LPCWSTR szFile)
{
WCHAR file[MAX_PATH] = {0};
DWORD res;
HRESULT hres;
static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
CHMInfo *ret = heap_alloc_zero(sizeof(CHMInfo));
res = GetFullPathNameW(szFile, sizeof(file), file, NULL);
ret->szFile = strdupW(file);
hres = CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
&IID_IITStorage, (void **) &ret->pITStorage) ;
if(FAILED(hres)) {
WARN("Could not create ITStorage: %08x\n", hres);
return CloseCHM(ret);
}
hres = IITStorage_StgOpenStorage(ret->pITStorage, szFile, NULL,
STGM_READ | STGM_SHARE_DENY_WRITE, NULL, 0, &ret->pStorage);
if(FAILED(hres)) {
WARN("Could not open storage: %08x\n", hres);
return CloseCHM(ret);
}
hres = IStorage_OpenStream(ret->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
&ret->strings_stream);
if(FAILED(hres)) {
WARN("Could not open #STRINGS stream: %08x\n", hres);
return CloseCHM(ret);
}
if(!ReadChmSystem(ret)) {
WARN("Could not read #SYSTEM\n");
return CloseCHM(ret);
}
return ret;
}
CHMInfo *CloseCHM(CHMInfo *chm)
{
if(chm->pITStorage)
IITStorage_Release(chm->pITStorage);
if(chm->pStorage)
IStorage_Release(chm->pStorage);
if(chm->strings_stream)
IStream_Release(chm->strings_stream);
if(chm->strings_size) {
int i;
for(i=0; i<chm->strings_size; i++)
heap_free(chm->strings[i]);
}
heap_free(chm->strings);
heap_free(chm);
return NULL;
}
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