Module c_mode 

IDL → C99 codegen mode (vendor spec zerodds-xcdr2-c-1.0).

For each IDL specification, this module emits:

• C99 typedef struct definitions per struct (with a module prefix in the type name, because C99 has no namespaces).
• Static zerodds_typesupport_t tables with XCDR2 encoder/ decoder/key-hash/free function pointers.
• Inline body implementations of the encoders/decoders that produce the XCDR2 wire format (XTypes 1.3 §7.4) byte-exactly.

Scope (rc1)

Supported:

• Structs with @final/@appendable/@mutable extensibility.
• Primitive types (boolean, octet, short/long/long long + unsigned, float, double).
• string (unbounded).
• sequence<T> (unbounded; nested sequences allowed).
• Nested modules → type-name prefix with :: (cross-language convention) and identifier prefix with _ (C99-conformant).
• @key members → key-hash routine via PlainCdr2BeKeyHolder.
• @id(N) for @mutable.

Out of scope (errors at the codegen level):

• Unions, enums, bitsets/bitmasks, typedefs, arrays, maps.
• wstring, fixed, any.
• @optional/@external/@bit_bound.

Invocation

use zerodds_idl::config::ParserConfig;
use zerodds_idl_cpp::{generate_c_header, CGenOptions};

let ast = zerodds_idl::parse("@final struct Point { long x; long y; };",
                             &ParserConfig::default()).unwrap();
let header = generate_c_header(&ast, &CGenOptions::default()).unwrap();
assert!(header.contains("typedef struct Point_s"));
assert!(header.contains("Point_typesupport"));

Structs

CGenOptions

Codegen options (parallel to CppGenOptions).

Functions

generate_c_header

Produces a complete C99 header from an IDL specification.