C++ state::next_line方法代码示例

/** \brief Parse a line from a version entry.
 *
 * This function reads the header (one line), a list of logs, and then
 * the footer of a version entry.
 *
 * If a version exists, even if it is wrong, the function returns true.
 * The function returns false if the end of the file is reached.
 *
 * \param[in] s  The state to read from.
 *
 * \return true if the end of the file was not yet reached when this
 *         version was read in full.
 */
bool changelog_file::version::parse(state& s)
{
    f_filename = s.get_filename();
    f_line = s.get_line();

    // the current line must be the header
    if(s.space_count() != 0)
    {
        wpkg_output::log("changelog:%1:%2: a changelog version entry must start with a valid header")
                .arg(f_filename)
                .arg(f_line)
            .level(wpkg_output::level_error)
            .module(wpkg_output::module_build_package)
            .action("changelog");
        return s.next_line();
    }

    bool good_header(true);
    const std::string& header(s.last_line());
    const char *h(header.c_str());
    const char *start(h);

    // *** Package Name ***
    for(; !isspace(*h) && *h != '('; ++h)
    {
        if(*h == '\0')
        {
            wpkg_output::log("changelog:%1:%2: invalid header, expected the project name, version, distributions, and urgency information")
                    .arg(f_filename)
                    .arg(f_line)
                .level(wpkg_output::level_error)
                .module(wpkg_output::module_build_package)
                .action("changelog");
            good_header = false;
            break;
        }
    }
    if(good_header)
    {
        std::string package_name(start, h - start);
        if(!wpkg_util::is_package_name(package_name))
        {
            wpkg_output::log("changelog:%1:%2: the package name %3 is not valid")
                    .arg(f_filename)
                    .arg(f_line)
                    .quoted_arg(package_name)
                .level(wpkg_output::level_error)
                .module(wpkg_output::module_build_package)
                .action("changelog");
        }
        else
        {
            f_package = package_name;
        }

        if(!isspace(*h))
        {
            // this is just a warning, but the user is expected to put a space
            // after the package name and before the version
            wpkg_output::log("changelog:%1:%2: the package name %3 is not followed by a space before the version information")
                    .arg(f_filename)
                    .arg(f_line)
                    .quoted_arg(package_name)
                .level(wpkg_output::level_warning)
                .module(wpkg_output::module_build_package)
                .package(f_package)
                .action("changelog");
            good_header = false;
        }
    }

    // *** Version ***
    if(good_header)
    {
        for(; isspace(*h); ++h);

        if(*h != '(')
        {
            wpkg_output::log("changelog:%1:%2: invalid header, expected the version between parenthesis after the package name")
                    .arg(f_filename)
                    .arg(f_line)
                .level(wpkg_output::level_error)
                .module(wpkg_output::module_build_package)
                .package(f_package)
                .action("changelog");
            good_header = false;
        }
//.........这里部分代码省略.........

/** \brief Parse one line of log.
 *
 * This function reads one line of log. Note that one line of log may appear
 * on multiple lines in the changelog file. One line ends when there is an
 * empty line, a line that does not start with at least 2 spaces, a line
 * that starts with an asterisk after the 2 spaces.
 *
 * \param[in] s  The state describing the input parameters.
 * \param[in] group  Whether this log is a group entry.
 *
 * \return true if the end of the file was not yet reached.
 */
bool changelog_file::version::log::parse(state& s, bool& group)
{
    f_filename = s.get_filename();
    f_line = s.get_line();

    f_is_group = group;
    group = false;

    if(s.space_count() != 2)
    {
        // invalid log entry; must start with 2 spaces
        return false;
    }
    std::string log_line(s.last_line());
    if(log_line[0] != '*')
    {
        // a new log entry must starts with an asterisk
        wpkg_output::log("changelog:%1:%2: a changelog log entry must start with an asterisk")
                .arg(f_filename)
                .arg(f_line)
            .level(wpkg_output::level_error)
            .module(wpkg_output::module_build_package)
            .action("changelog");
        return false;
    }

    for(;;)
    {
        // right trim the f_log (it automatically is left trimmed)
        std::string::size_type p(f_log.find_last_not_of(" \t\n\r\v\f"));
        if(p != std::string::npos)
        {
            f_log = f_log.substr(0, p + 1);
        }

        // check whether there is more data that should be added to the log
        // line; if not, leave it there and return, it should be an empty line
        // a new log, or the maintainer information.
        if(!s.next_line())
        {
            break;
        }
        if(s.has_empty_line())
        {
            // we bumped in an empty line, we are starting a new group.
            group = true;
            break;
        }
        // really we should have exactly 4 spaces...
        if(s.space_count() < 2)
        {
            break;
        }
        std::string new_line(s.last_line());
        if(new_line[0] == '*')
        {
            break;
        }
        f_log += " ";
        f_log += new_line;
    }

    f_log = log_line;

    // TODO: find the bugs stuff

    return true;
}