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use crate::common::{Encoding, Format};
use crate::read::{Error, Reader, Result};
#[derive(Debug, Clone, Copy)]
pub(crate) struct ListsHeader {
encoding: Encoding,
#[allow(dead_code)]
offset_entry_count: u32,
}
impl Default for ListsHeader {
fn default() -> Self {
ListsHeader {
encoding: Encoding {
format: Format::Dwarf32,
version: 5,
address_size: 0,
},
offset_entry_count: 0,
}
}
}
impl ListsHeader {
/// Return the serialized size of the table header.
#[allow(dead_code)]
#[inline]
fn size(self) -> u8 {
// initial_length + version + address_size + segment_selector_size + offset_entry_count
ListsHeader::size_for_encoding(self.encoding)
}
/// Return the serialized size of the table header.
#[inline]
pub(crate) fn size_for_encoding(encoding: Encoding) -> u8 {
// initial_length + version + address_size + segment_selector_size + offset_entry_count
encoding.format.initial_length_size() + 2 + 1 + 1 + 4
}
}
// TODO: add an iterator over headers in the appropriate sections section
#[allow(dead_code)]
fn parse_header<R: Reader>(input: &mut R) -> Result<ListsHeader> {
let (length, format) = input.read_initial_length()?;
input.truncate(length)?;
let version = input.read_u16()?;
if version != 5 {
return Err(Error::UnknownVersion(u64::from(version)));
}
let address_size = input.read_u8()?;
let segment_selector_size = input.read_u8()?;
if segment_selector_size != 0 {
return Err(Error::UnsupportedSegmentSize);
}
let offset_entry_count = input.read_u32()?;
let encoding = Encoding {
format,
version,
address_size,
};
Ok(ListsHeader {
encoding,
offset_entry_count,
})
}