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

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/*
* CHM Utility API
*
* Copyright 2005 James Hawkins
*
* 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 <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "winnls.h"
#include "winreg.h"
#include "ole2.h"
#include "htmlhelp.h"
#include "initguid.h"
#include "chm.h"
static LPWSTR CHM_ANSIToUnicode(LPCSTR ansi)
{
LPWSTR unicode;
int count;
count = MultiByteToWideChar(CP_ACP, 0, ansi, -1, NULL, 0);
unicode = HeapAlloc(GetProcessHeap(), 0, count * sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0, ansi, -1, unicode, count);
return unicode;
}
/* Reads a string from the #STRINGS section in the CHM file */
static LPWSTR CHM_ReadString(CHMInfo *pChmInfo, DWORD dwOffset)
{
LARGE_INTEGER liOffset;
IStorage *pStorage = pChmInfo->pStorage;
IStream *pStream;
DWORD cbRead;
ULONG iPos;
DWORD dwSize;
LPSTR szString;
LPWSTR stringW;
const int CB_READ_BLOCK = 64;
static const WCHAR stringsW[] = {'#','S','T','R','I','N','G','S',0};
dwSize = CB_READ_BLOCK;
szString = HeapAlloc(GetProcessHeap(), 0, dwSize);
if (FAILED(IStorage_OpenStream(pStorage, stringsW, NULL, STGM_READ, 0, &pStream)))
return NULL;
liOffset.QuadPart = dwOffset;
if (FAILED(IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL)))
{
IStream_Release(pStream);
return NULL;
}
while (SUCCEEDED(IStream_Read(pStream, szString, CB_READ_BLOCK, &cbRead)))
{
if (!cbRead)
return NULL;
for (iPos = 0; iPos < cbRead; iPos++)
{
if (!szString[iPos])
{
stringW = CHM_ANSIToUnicode(szString);
HeapFree(GetProcessHeap(), 0, szString);
return stringW;
}
}
dwSize *= 2;
szString = HeapReAlloc(GetProcessHeap(), 0, szString, dwSize);
szString += cbRead;
}
/* didn't find a string */
return NULL;
}
/* 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 CHM_LoadWinTypeFromCHM(CHMInfo *pChmInfo, HH_WINTYPEW *pHHWinType)
{
LARGE_INTEGER liOffset;
IStorage *pStorage = 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, pHHWinType, sizeof(*pHHWinType), &cbRead);
if (FAILED(hr)) goto done;
/* convert the #STRINGS offsets to actual strings */
pHHWinType->pszType = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszType);
pHHWinType->pszCaption = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszCaption);
pHHWinType->pszToc = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszToc);
pHHWinType->pszIndex = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszIndex);
pHHWinType->pszFile = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszFile);
pHHWinType->pszHome = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszHome);
pHHWinType->pszJump1 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszJump1);
pHHWinType->pszJump2 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszJump2);
pHHWinType->pszUrlJump1 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszUrlJump1);
pHHWinType->pszUrlJump2 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszUrlJump2);
/* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
* work in this case
*/
#if 0
pHHWinType->pszCustomTabs = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszCustomTabs);
#endif
done:
IStream_Release(pStream);
return SUCCEEDED(hr);
}
/* Opens the CHM file for reading */
BOOL CHM_OpenCHM(CHMInfo *pChmInfo, LPCWSTR szFile)
{
pChmInfo->szFile = szFile;
if (FAILED(CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
&IID_IITStorage, (void **) &pChmInfo->pITStorage)))
return FALSE;
if (FAILED(IITStorage_StgOpenStorage(pChmInfo->pITStorage, szFile, NULL,
STGM_READ | STGM_SHARE_DENY_WRITE,
NULL, 0, &pChmInfo->pStorage)))
return FALSE;
return TRUE;
}
void CHM_CloseCHM(CHMInfo *pCHMInfo)
{
IITStorage_Release(pCHMInfo->pITStorage);
IStorage_Release(pCHMInfo->pStorage);
}