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use capability::FromClientHook;
use private::capability::{ClientHook, PipelineHook, PipelineOp};
use private::layout::{PointerReader, PointerBuilder};
use traits::{FromPointerReader, FromPointerBuilder, SetPointerBuilder};
use Result;
#[derive(Copy, Clone)]
pub struct Owned(());
impl <'a> ::traits::Owned<'a> for Owned {
type Reader = Reader<'a>;
type Builder = Builder<'a>;
}
impl ::traits::Pipelined for Owned {
type Pipeline = Pipeline;
}
#[derive(Copy, Clone)]
pub struct Reader<'a> {
reader : PointerReader<'a>
}
impl <'a> Reader<'a> {
#[inline]
pub fn new<'b>(reader : PointerReader<'b>) -> Reader<'b> {
Reader { reader : reader }
}
#[inline]
pub fn is_null(&self) -> bool {
self.reader.is_null()
}
#[inline]
pub fn get_as<T : FromPointerReader<'a>>(&self) -> Result<T> {
FromPointerReader::get_from_pointer(&self.reader)
}
pub fn get_as_capability<T : FromClientHook>(&self) -> Result<T> {
Ok(FromClientHook::new(try!(self.reader.get_capability())))
}
pub fn get_pipelined_cap(&self, ops : &[PipelineOp]) -> Result<Box<ClientHook+Send>> {
let mut pointer = self.reader;
for op in ops.iter() {
match op {
&PipelineOp::Noop => { }
&PipelineOp::GetPointerField(idx) => {
pointer = try!(pointer.get_struct(::std::ptr::null())).get_pointer_field(idx as usize);
}
}
}
pointer.get_capability()
}
}
impl <'a> FromPointerReader<'a> for Reader<'a> {
fn get_from_pointer(reader: &PointerReader<'a>) -> Result<Reader<'a>> {
Ok(Reader { reader: *reader })
}
}
impl <'a> ::traits::SetPointerBuilder<Builder<'a>> for Reader<'a> {
fn set_pointer_builder<'b>(pointer: ::private::layout::PointerBuilder<'b>, value: Reader<'a>) -> Result<()> {
pointer.copy_from(value.reader)
}
}
pub struct Builder<'a> {
builder : PointerBuilder<'a>
}
impl <'a> Builder<'a> {
#[inline]
pub fn new<'b>(builder : PointerBuilder<'a>) -> Builder<'a> {
Builder { builder : builder }
}
pub fn get_as<T : FromPointerBuilder<'a>>(self) -> Result<T> {
FromPointerBuilder::get_from_pointer(self.builder)
}
pub fn init_as<T : FromPointerBuilder<'a>>(self) -> T {
FromPointerBuilder::init_pointer(self.builder, 0)
}
pub fn initn_as<T: FromPointerBuilder<'a>>(self, size: u32) -> T {
FromPointerBuilder::init_pointer(self.builder, size)
}
pub fn set_as<To, From : SetPointerBuilder<To>>(self, value : From) -> Result<()> {
SetPointerBuilder::<To>::set_pointer_builder(self.builder, value)
}
pub fn set_as_capability(&self, value : Box<ClientHook+Send>) {
self.builder.set_capability(value);
}
#[inline]
pub fn clear(&mut self) {
self.builder.clear()
}
#[inline]
pub fn as_reader(self) -> Reader<'a> {
Reader { reader : self.builder.as_reader() }
}
}
impl <'a> FromPointerBuilder<'a> for Builder<'a> {
fn init_pointer(builder: PointerBuilder<'a>, _len: u32) -> Builder<'a> {
Builder { builder: builder }
}
fn get_from_pointer(builder: PointerBuilder<'a>) -> Result<Builder<'a>> {
Ok(Builder { builder: builder })
}
}
pub struct Pipeline {
hook : Box<PipelineHook+Send>,
ops : Vec<PipelineOp>,
}
impl Pipeline {
pub fn new(hook : Box<PipelineHook+Send>) -> Pipeline {
Pipeline { hook : hook, ops : Vec::new() }
}
pub fn noop(&self) -> Pipeline {
Pipeline { hook : self.hook.copy(), ops : self.ops.clone() }
}
pub fn get_pointer_field(&self, pointer_index : u16) -> Pipeline {
let mut new_ops = Vec::with_capacity(self.ops.len() + 1);
for &op in self.ops.iter() {
new_ops.push(op)
}
new_ops.push(PipelineOp::GetPointerField(pointer_index));
Pipeline { hook : self.hook.copy(), ops : new_ops }
}
pub fn as_cap(&self) -> Box<ClientHook+Send> {
self.hook.get_pipelined_cap(self.ops.clone())
}
}