// Copyright (c) 2018 the capnproto-rust contributors
//
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// of this software and associated documentation files (the "Software"), to deal
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// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// THE SOFTWARE.

//! Functions providing low level access to encoded data.

use crate::traits::{IntoInternalListReader, IntoInternalStructReader};

/// Gets a slice view of the data section of a struct.
pub fn get_struct_data_section<'a, T>(value: T) -> &'a [u8]
    where T: IntoInternalStructReader<'a>
{
    value.into_internal_struct_reader().get_data_section_as_blob()
}

/// Gets the pointer section as a list.
pub fn get_struct_pointer_section<'a, T>(value: T) -> crate::any_pointer_list::Reader<'a>
    where T: IntoInternalStructReader<'a>
{
    crate::any_pointer_list::Reader::new(
        value.into_internal_struct_reader().get_pointer_section_as_list())
}

/// Gets the size of the elements in a list.
pub fn get_list_element_size<'a, T>(value: T) -> crate::private::layout::ElementSize
    where T: IntoInternalListReader<'a>
{
    value.into_internal_list_reader().get_element_size()
}

/// Gets the number of bits between successive elements in a list.
pub fn get_list_step_size_in_bits<'a, T>(value: T) -> u32
    where T: IntoInternalListReader<'a>
{
    value.into_internal_list_reader().get_step_size_in_bits()
}

/// Gets a slice view of a list, exluding any tag word.
pub fn get_list_bytes<'a, T>(value: T) -> &'a [u8]
    where T: IntoInternalListReader<'a>
{
    value.into_internal_list_reader().into_raw_bytes()
}