C++ (Cpp) String::at Examples

Example #1

File: FileSystemUtils.cpp Project: Fahrenheit2539/aws-sdk-cpp

Aws::String FileSystemUtils::GetHomeDirectory()
{
    static const char* HOME_DIR_ENV_VAR = "HOME";

    AWS_LOGSTREAM_TRACE(FILE_SYSTEM_UTILS_LOG_TAG, "Checking " << HOME_DIR_ENV_VAR << " for the home directory.");
 
    const char* homeEnvDir = std::getenv(HOME_DIR_ENV_VAR);
    Aws::String homeDir(homeEnvDir ? homeEnvDir : "");

    AWS_LOGSTREAM_DEBUG(FILE_SYSTEM_UTILS_LOG_TAG, "Environment value for variable " << HOME_DIR_ENV_VAR << " is " << homeDir);

    if(homeDir.empty())
    {
        AWS_LOG_WARN(FILE_SYSTEM_UTILS_LOG_TAG, "Home dir not stored in environment, trying to fetch manually from the OS.");

	passwd pw;
	passwd *p_pw = nullptr;
	char pw_buffer[4096];
	getpwuid_r(getuid(), &pw, pw_buffer, sizeof(pw_buffer), &p_pw);
        if(p_pw && p_pw->pw_dir)
        {
            homeDir = p_pw->pw_dir;
        }
	
        AWS_LOGSTREAM_INFO(FILE_SYSTEM_UTILS_LOG_TAG, "Pulled " << homeDir << " as home directory from the OS.");
    }

    Aws::String retVal = homeDir.size() > 0 ? StringUtils::Trim(homeDir.c_str()) : "";
    if(!retVal.empty())
    {
        if(retVal.at(retVal.length() - 1) != PATH_DELIM)
        {
            AWS_LOGSTREAM_DEBUG(FILE_SYSTEM_UTILS_LOG_TAG, "Home directory is missing the final " << PATH_DELIM << " appending one to normalize");
            retVal += PATH_DELIM;
        }
    }

    AWS_LOGSTREAM_DEBUG(FILE_SYSTEM_UTILS_LOG_TAG, "Final Home Directory is " << retVal);

    return retVal;
}

Example #2

File: FileSystem.cpp Project: marcomagdy/aws-sdk-cpp

Aws::String GetHomeDirectory()
{
    static const char* HOME_DIR_ENV_VAR = "USERPROFILE";

    AWS_LOGSTREAM_TRACE(FILE_SYSTEM_UTILS_LOG_TAG, "Checking " << HOME_DIR_ENV_VAR << " for the home directory.");
    Aws::String homeDir = Aws::Environment::GetEnv(HOME_DIR_ENV_VAR);
    AWS_LOGSTREAM_DEBUG(FILE_SYSTEM_UTILS_LOG_TAG, "Environment value for variable " << HOME_DIR_ENV_VAR << " is " << homeDir);
    if(homeDir.empty())
    {
        AWS_LOGSTREAM_WARN(FILE_SYSTEM_UTILS_LOG_TAG, "Home dir not stored in environment, trying to fetch manually from the OS.");
        HANDLE hToken;
    
        if (OpenProcessToken(GetCurrentProcess(), TOKEN_READ, &hToken))
        {
            DWORD len = MAX_PATH;
            WCHAR path[MAX_PATH];
            if (GetUserProfileDirectoryW(hToken, path, &len))
            {                
                homeDir = Aws::Utils::StringUtils::FromWString(path);
            }
            CloseHandle(hToken);
        }        

        AWS_LOGSTREAM_INFO(FILE_SYSTEM_UTILS_LOG_TAG, "Pulled " << homeDir << " as home directory from the OS.");
    }

    Aws::String retVal = (homeDir.size() > 0) ? Aws::Utils::StringUtils::Trim(homeDir.c_str()) : "";

    if (!retVal.empty())
    {
        if (retVal.at(retVal.length() - 1) != Aws::FileSystem::PATH_DELIM)
        {
            retVal += Aws::FileSystem::PATH_DELIM;
        }
    }
    
    return retVal;
}