Crate libxml_rs 

libxml-rs: Custodial native-Rust reimplementation of libxml2 and libxslt

This is not an XML crate. This is not an XSLT crate. This is not a wrapper. This is a forensic reconstruction of the observable behavior of the libxml2 + libxslt ecosystem across its historical lifetime, implemented in native Rust.

Architecture

The crate is organized into semantic modules corresponding to real ownership boundaries:

• abi - C ABI compatibility layer: types, structs, constants, exports, callbacks, allocator, ownership, versioning
• xml - libxml2 implementation: parser, SAX, tree, entities, namespaces, DTD, validation, reader, writer, encoding, I/O, catalog, URI, XPath, XPointer, XInclude, RELAX NG, schemas, Schematron, C14N, HTML, regex, automata, dictionary, hash, list, debug, globals, threads, errors, memory
• xslt - libxslt implementation: stylesheet, compiler, transform, templates, patterns, variables, parameters, keys, attributes, namespace_alias, whitespace, sorting, numbering, documents, imports, extensions, serialization, security, errors
• exslt - EXSLT modules: common, math, sets, strings, dynamic, functions, dates
• compatibility - Historical profiles, quirks, platform-specific behavior
• bin - CLI tools: xmllint, xmlcatalog, xsltproc

Safety

This crate uses unsafe only where fundamentally required for C ABI export, raw-pointer compatibility, foreign allocator interoperability, public C structure layout, callbacks, variadic compatibility, OS interfaces, and dynamic-loader interaction.

Every unsafe block documents:

• What must be true
• Who establishes it
• How long it remains true
• Which oracle/parity court exercises the assumption
• What would constitute violation

Modules

abi

C ABI compatibility layer (§4, §14).

compatibility

Compatibility profiles, historical behavior, and platform quirks (§68, §69).

exslt

EXSLT implementation — native Rust (§35).

xml

libxml2 implementation — native Rust (§1, §3, §31).

xslt

libxslt implementation — native Rust (§1, §3, §31–§34).

Constants

LIBXML_RS_VERSION

The full version string of the libxml-rs crate (from Cargo.toml).

LIBXML_RS_VERSION_MAJOR

Major version number of libxml-rs.

LIBXML_RS_VERSION_MICRO

Micro version (patch) number of libxml-rs.

LIBXML_RS_VERSION_MINOR

Minor version number of libxml-rs.

Functions

xmlCheckVersion

Check library version at runtime (libxml2 compatibility)

xmlCleanupParser^⚠

Clean up the library (libxml2 compatibility)

xmlInitParser^⚠

Initialize the library (libxml2 compatibility)

xmlInitThreads^⚠

Initialize the library for threaded use (libxml2 compatibility)

xmlLibxmlVersion

Get the library version (libxml2 compatibility)

xmlLibxmlVersionString

Get the library version string (libxml2 compatibility)