Function parse_lnk

src/fl/stl/url.h:274–310

Parse the contents of a `.lnk` file into a `fl::url`. Format: one URL per line. Leading/trailing whitespace on each line is ignored. Blank lines and lines whose first non-whitespace character is `#` are treated as comments and skipped. The first non-comment, non-blank line is returned as a `fl::url`. Future-compat: additional lines (metadata like `sha256=...`, `fallback=...`) are ignored by this

/// See also `parse_lnk_with_metadata()` which returns the URL alongside the
/// (currently unenforced) metadata fields for forward-compat callers.
inline url parse_lnk(fl::string_view content) FL_NOEXCEPT {
    fl::size pos = 0;
    while (pos < content.size()) {
        fl::size eol = content.find('\n', pos);
        fl::size lineEnd = (eol == fl::string_view::npos) ? content.size() : eol;
        fl::string_view line = content.substr(pos, lineEnd - pos);
        pos = (eol == fl::string_view::npos) ? content.size() : eol + 1;

        // Strip a trailing '\r' from CRLF line endings.
        if (!line.empty() && line[line.size() - 1] == '\r') {
            line = line.substr(0, line.size() - 1);
        }

        // Trim leading whitespace.
        fl::size s = 0;
        while (s < line.size() &&
               (line[s] == ' ' || line[s] == '\t')) {
            ++s;
        }
        // Trim trailing whitespace.
        fl::size e = line.size();
        while (e > s &&
               (line[e - 1] == ' ' || line[e - 1] == '\t')) {
            --e;
        }
        line = line.substr(s, e - s);

        if (line.empty()) {
            continue;
        }
        if (line[0] == '#') {
            continue;
        }
        return url(line);
    }
    return url();
}

/// Parse a `.lnk` file into URL + metadata (forward-compat).
///