Browser C lane: compiler contract and third-party notices
=========================================================

Public contract
---------------

The imported file must be one UTF-8 C11 source file of at most 64 KiB.
It is compiled locally to WebAssembly and is never uploaded by this page.
The public input boundary is 2,000 variables, 10,000 clauses, 40,000 literals,
80 literals per clause, and 512 KiB of ASCII DIMACS text.

The resulting command is invoked as:

    solver /input.cnf MAX_FLIPS SEED

It must write exactly one of these bounded result forms:

    SATISFIED
    v SIGNED_ASSIGNMENT_LITERALS 0
    flips NONNEGATIVE_INTEGER

or:

    UNKNOWN
    flips NONNEGATIVE_INTEGER

The page never accepts the positive form on trust. It independently checks
the complete assignment against the original formula before displaying it.
Runtime wall time is measured by the browser host. Solver-reported time is not
used. A fresh execution worker is terminated at the selected lane boundary.

Pinned compiler components
--------------------------

The compiler worker loads these immutable npm-package assets on demand from
unpkg. They are not part of the initial page download.

Package: @runno/sandbox 0.10.2
Runtime package: @runno/wasi 0.10.0
clang.wasm SHA-256:
2A466F0E990329D3230B869D04FC20803EAE96A7FEB3A3F6C93E25A77B8AED1D
wasm-ld.wasm SHA-256:
36419ED202011765222098D7701218378B67F634D50F0A4625059AE2C9860F48
clang-fs.tar.gz SHA-256:
7ED12063619882E4DFA710AB371FC91848B256F85A4075747E8BD5C167902B50

The worker computes and compares every digest before use.

Runno licence
--------------

MIT License

Copyright (c) Benjamin Taylor (me@taybenlor.com) and its affiliates.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Compiler provenance
-------------------

Runno identifies the browser compiler as the wasm-clang work by Ben Smith
(https://github.com/binji/wasm-clang). That project is distributed under the
Apache License 2.0; its canonical terms are available at:
https://github.com/binji/wasm-clang/blob/master/LICENSE

The C reference lane supplied by Jacob Bulmash is a separate work and carries
its own PolyForm Strict 1.0.0 header.