C++, load text from resource or disk-优快云博客

本文介绍了两种资源文件加载的方法：一种是从DLL中加载指定ID的资源到内存；另一种是从磁盘文件中读取内容到内存。这两种方法都实现了将外部资源加载进程序的功能。

代码

BOOL LoadFileResource(const wstring& strName, HMODULE hDll,
                      int resourceID, string& outputBuf)
{
    HGLOBAL hResourceLoaded;   // handle to loaded resource
    HRSRC   hRes;              // handle/ptr to res. info.
    char    *lpResLock;        // pointer to resource data
    DWORD   dwSizeRes;

    hRes = FindResourceW(hDll,  MAKEINTRESOURCE(resourceID), strName.c_str());
    hResourceLoaded = LoadResource(hDll, hRes);
    lpResLock = (char *) LockResource(hResourceLoaded);
    dwSizeRes = SizeofResource(hDll, hRes);

    char* pBuf = new char[dwSizeRes+1];
    if ( NULL == pBuf )
    {
        cout << "Alloc memory for storing the xml schema file failed." << endl;
        return FALSE;
    }
    ZeroMemory(pBuf, dwSizeRes+1);

    memcpy(pBuf, lpResLock, dwSizeRes);
    outputBuf.clear();
    outputBuf.assign(pBuf);
    delete [] pBuf;
    return TRUE;
}

BOOL LoadDiskFile(const wstring& fileName, string& outputBuf)
{
    BOOL retv        = FALSE;
    FILE* schemaFile = NULL;

    if (fileName.empty() || (0 != _wfopen_s(&schemaFile, fileName.c_str(), L"r+t")))
        return retv;

    fseek(schemaFile, 0, SEEK_END);
    long fileLen   = ftell(schemaFile);
    char* pFileBuf = new char[fileLen];
    if ( NULL == pFileBuf )
    {
        fclose(schemaFile);
        return retv;
    }
    memset(pFileBuf, 0, fileLen);

    fseek(schemaFile, 0 , SEEK_SET );
    long readCount = (long)fread(pFileBuf, 1, fileLen, schemaFile);
    if ( feof(schemaFile) && 0 != readCount )
    {
        outputBuf.assign(pFileBuf);
        retv = TRUE;
    }

    fclose(schemaFile);
    delete []pFileBuf;
    return retv;
}