2005-09-06 11:20:42 +02:00
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/*
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* CHM Utility API
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*
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* Copyright 2005 James Hawkins
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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2006-05-18 14:49:52 +02:00
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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2005-09-06 11:20:42 +02:00
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*/
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#include <stdarg.h>
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#define COBJMACROS
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#include "windef.h"
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#include "winbase.h"
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#include "winuser.h"
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#include "winnls.h"
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#include "winreg.h"
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#include "ole2.h"
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#include "htmlhelp.h"
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#include "initguid.h"
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#include "chm.h"
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static LPWSTR CHM_ANSIToUnicode(LPCSTR ansi)
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{
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LPWSTR unicode;
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int count;
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count = MultiByteToWideChar(CP_ACP, 0, ansi, -1, NULL, 0);
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unicode = HeapAlloc(GetProcessHeap(), 0, count * sizeof(WCHAR));
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MultiByteToWideChar(CP_ACP, 0, ansi, -1, unicode, count);
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return unicode;
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}
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/* Reads a string from the #STRINGS section in the CHM file */
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2006-08-02 22:02:25 +02:00
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static LPWSTR CHM_ReadString(CHMInfo *pChmInfo, DWORD dwOffset)
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2005-09-06 11:20:42 +02:00
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{
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LARGE_INTEGER liOffset;
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IStorage *pStorage = pChmInfo->pStorage;
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IStream *pStream;
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DWORD cbRead;
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ULONG iPos;
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DWORD dwSize;
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LPSTR szString;
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LPWSTR stringW;
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const int CB_READ_BLOCK = 64;
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static const WCHAR stringsW[] = {'#','S','T','R','I','N','G','S',0};
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dwSize = CB_READ_BLOCK;
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szString = HeapAlloc(GetProcessHeap(), 0, dwSize);
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if (FAILED(IStorage_OpenStream(pStorage, stringsW, NULL, STGM_READ, 0, &pStream)))
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return NULL;
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liOffset.QuadPart = dwOffset;
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if (FAILED(IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL)))
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{
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IStream_Release(pStream);
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return NULL;
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}
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while (SUCCEEDED(IStream_Read(pStream, szString, CB_READ_BLOCK, &cbRead)))
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{
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if (!cbRead)
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return NULL;
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for (iPos = 0; iPos < cbRead; iPos++)
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{
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if (!szString[iPos])
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{
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stringW = CHM_ANSIToUnicode(szString);
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HeapFree(GetProcessHeap(), 0, szString);
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return stringW;
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}
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}
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dwSize *= 2;
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szString = HeapReAlloc(GetProcessHeap(), 0, szString, dwSize);
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szString += cbRead;
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}
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/* didn't find a string */
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return NULL;
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}
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/* Loads the HH_WINTYPE data from the CHM file
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*
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* FIXME: There may be more than one window type in the file, so
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* add the ability to choose a certain window type
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*/
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BOOL CHM_LoadWinTypeFromCHM(CHMInfo *pChmInfo, HH_WINTYPEW *pHHWinType)
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{
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LARGE_INTEGER liOffset;
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IStorage *pStorage = pChmInfo->pStorage;
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IStream *pStream;
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HRESULT hr;
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DWORD cbRead;
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static const WCHAR windowsW[] = {'#','W','I','N','D','O','W','S',0};
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hr = IStorage_OpenStream(pStorage, windowsW, NULL, STGM_READ, 0, &pStream);
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if (FAILED(hr))
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return FALSE;
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/* jump past the #WINDOWS header */
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liOffset.QuadPart = sizeof(DWORD) * 2;
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hr = IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL);
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if (FAILED(hr)) goto done;
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/* read the HH_WINTYPE struct data */
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hr = IStream_Read(pStream, pHHWinType, sizeof(*pHHWinType), &cbRead);
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if (FAILED(hr)) goto done;
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/* convert the #STRINGS offsets to actual strings */
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pHHWinType->pszType = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszType);
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pHHWinType->pszCaption = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszCaption);
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pHHWinType->pszToc = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszToc);
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pHHWinType->pszIndex = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszIndex);
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pHHWinType->pszFile = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszFile);
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pHHWinType->pszHome = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszHome);
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pHHWinType->pszJump1 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszJump1);
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pHHWinType->pszJump2 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszJump2);
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pHHWinType->pszUrlJump1 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszUrlJump1);
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pHHWinType->pszUrlJump2 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszUrlJump2);
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/* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
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* work in this case
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*/
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#if 0
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pHHWinType->pszCustomTabs = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszCustomTabs);
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#endif
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done:
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IStream_Release(pStream);
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return SUCCEEDED(hr);
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}
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/* Opens the CHM file for reading */
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BOOL CHM_OpenCHM(CHMInfo *pChmInfo, LPCWSTR szFile)
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{
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pChmInfo->szFile = szFile;
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if (FAILED(CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
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&IID_IITStorage, (void **) &pChmInfo->pITStorage)))
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return FALSE;
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if (FAILED(IITStorage_StgOpenStorage(pChmInfo->pITStorage, szFile, NULL,
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STGM_READ | STGM_SHARE_DENY_WRITE,
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NULL, 0, &pChmInfo->pStorage)))
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return FALSE;
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return TRUE;
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}
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void CHM_CloseCHM(CHMInfo *pCHMInfo)
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{
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IITStorage_Release(pCHMInfo->pITStorage);
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IStorage_Release(pCHMInfo->pStorage);
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}
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