<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">Hi all,</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)"><span style="background-color:rgb(255,255,255);color:rgb(51,51,51)">I’ll outline the progress from Week 2 of the Rust–UNO binding project.</span></p><h2 id="gmail-quick-summary" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.75em;padding-bottom:0.3em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">Quick Summary</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">Week 2 focused on building the core FFI infrastructure to safely bridge Rust and LibreOffice's C API. This work is documented as <a href="https://gerrit.libreoffice.org/c/core/+/186425" style="color:rgb(0,136,204);text-decoration-line:none">patch #186425</a> in the LibreOffice Gerrit repository. The headline achievement is a complete infrastructure that handles everything from build system integration to automatic memory management, with the first high-level API (string handling) working end-to-end.</p><h2 id="gmail-what-was-built-this-week" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.75em;padding-bottom:0.3em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">What Was Built This Week</h2><h3 id="gmail-project-structure" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.5em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">Project Structure</h3><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">The project now has a well-organized codebase:</p><pre class="gmail-language-text" style="padding:0.8em;overflow:auto;line-height:1.4;border:rgb(214,214,214);border-radius:3px;margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);background:rgb(245,245,245);font-family:Consolas,"Liberation Mono",Menlo,Courier,monospace;word-break:normal;font-size:16px"><code style="font-family:Menlo,Monaco,Consolas,"Courier New",monospace;color:rgb(0,0,0);background:0px 0px transparent;padding:0px;border-radius:3px;font-size:0.85em;margin:0px;word-break:normal;border:0px;display:inline;max-width:initial;overflow:initial;line-height:inherit">rust_uno/
├── src/
│ ├── <a href="http://lib.rs">lib.rs</a> # Main library with public API
│ ├── <a href="http://types.rs">types.rs</a> # SAL type definitions and conversions
│ ├── <a href="http://string.rs">string.rs</a> # OUString safe wrapper + unsafe FFI functions
│ └── <a href="http://bindings.rs">bindings.rs</a> # Generated FFI bindings (temporary, gitignored)
├── cpp/
│ └── embindtest.cxx # Custom C++ test component
├── tests/
│ └── <a href="http://integration_tests.rs">integration_tests.rs</a> # Comprehensive test suite
├── examples/
│ ├── <a href="http://basic_usage.rs">basic_usage.rs</a> # Practical usage examples
│ └── <a href="http://string_examples.rs">string_examples.rs</a> # UNO string handling examples
├── <a href="http://build.rs">build.rs</a> # Build system integration
└── Cargo.toml # Project configuration
</code></pre><h2 id="gmail-key-achievements" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.75em;padding-bottom:0.3em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">Key Achievements</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">This week delivered several major accomplishments that established a solid foundation for the project. The implementation now includes <strong style="color:rgb(0,0,0)">foundational FFI infrastructure</strong> that allows users to work with LibreOffice strings using natural Rust code while all the complexity is handled behind the scenes. The <strong style="color:rgb(0,0,0)">memory safety</strong> integration is particularly noteworthy - LibreOffice's reference counting was successfully bridged with Rust's ownership system, achieving zero memory leaks.</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)"><strong style="color:rgb(0,0,0)">Performance</strong> metrics are excellent with fast clean builds, incremental builds, and test execution times. The <strong style="color:rgb(0,0,0)">test-driven development</strong> approach proved invaluable, as writing tests first caught several UTF-8 conversion and memory management bugs that would have been much more difficult to debug later in the development cycle.</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)"><strong style="color:rgb(0,0,0)">Practical examples</strong> were also created to demonstrate the API usage, showing how developers can work with UNO strings using natural Rust patterns while the FFI complexity remains completely hidden.</p><h2 id="gmail-technical-deep-dive" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.75em;padding-bottom:0.3em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">Technical Deep Dive</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">One significant challenge was LibreOffice's build system complexity. The initial naive approach failed with hundreds of compilation errors. This revealed that LibreOffice's exact build configuration needed to be mirrored rather than simplified. The solution automatically detects the LibreOffice installation and replicates all compiler flags, include paths, and preprocessor definitions.</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">For memory management, the discovery was that LibreOffice's reference counting maps beautifully to Rust's RAII patterns. By implementing <code style="font-family:Menlo,Monaco,Consolas,"Courier New",monospace;color:rgb(0,0,0);background-color:rgb(240,240,240);padding:0.2em 0px;border-radius:3px;font-size:0.85em">Drop</code> for automatic cleanup and <code style="font-family:Menlo,Monaco,Consolas,"Courier New",monospace;color:rgb(0,0,0);background-color:rgb(240,240,240);padding:0.2em 0px;border-radius:3px;font-size:0.85em">Clone</code> for reference counting, seamless integration was achieved where LibreOffice objects are automatically managed by Rust's ownership system.</p><h2 id="gmail-what-this-enables" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.75em;padding-bottom:0.3em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">What This Enables</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">With this foundation in place, the following capabilities are now available:</p><ul style="padding-left:2em;margin-top:0px;margin-bottom:16px;list-style-position:initial;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)"><li style="margin-bottom:0px">Create UNO strings naturally with automatic memory management</li><li style="margin-bottom:0px">Build more complex types using the same layered approach</li><li style="margin-bottom:0px">Move on to implementing UNO services and interfaces</li><li style="margin-bottom:0px">Provide a completely safe API while maintaining full LibreOffice compatibility</li></ul><h2 id="gmail-next-steps" style="line-height:1.2;margin-top:1em;margin-bottom:16px;color:rgb(0,0,0);font-size:1.75em;padding-bottom:0.3em;font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;background-color:rgb(255,255,255)">Next Steps</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">With the foundational infrastructure now complete, development will continue to support the additional types needed for full UNO integration. This includes extending the type system and building upon the established architecture to provide comprehensive LibreOffice API access through Rust.</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;background-color:rgb(255,255,255)">Best regards,<br>Mohamed</p></div></div></div></div>