Struct PluginVtable 

#[repr(C)]
pub struct PluginVtable {
    pub introspect: unsafe extern "C" fn(input_json: *const c_char, out_json: *mut *mut c_char) -> c_int,
    pub free_string: unsafe extern "C" fn(ptr: *mut c_char),
}

Function pointer table. Every function takes and returns heap-allocated null-terminated UTF-8 JSON strings the host must free via free_string.

Fields

introspect: unsafe extern "C" fn(input_json: *const c_char, out_json: *mut *mut c_char) -> c_int

Introspect the target.

input_json is a UTF-8 JSON document matching crate::SyncInput. On success *out_json points to a plugin-owned JSON string of a crate::schema::Schema; on failure *out_json is an error message. Returns 0 on success, non-zero on error.

free_string: unsafe extern "C" fn(ptr: *mut c_char)

Free a string previously returned by this plugin.