CBB_init function
CBB_init initialises cbb with initial_capacity. Since a CBB grows as
needed, the initial_capacity is just a hint. It returns one on success or
zero on allocation failure.
Implementation
@meta.RecordUse()
@ffi.Native<ffi.Int Function(ffi.Pointer<CBB>, ffi.Size)>(
symbol: 'bssl_dart_CBB_init',
)
external int CBB_init(
ffi.Pointer<CBB> cbb,
int initial_capacity,
);