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use endianity::{EndianBuf, Endianity};
use parser::Result;
use reader::Reader;
use Section;
/// An offset into the `.debug_str` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugStrOffset<T = usize>(pub T);
/// The `DebugStr` struct represents the DWARF strings
/// found in the `.debug_str` section.
#[derive(Debug, Clone, Copy)]
pub struct DebugStr<R: Reader> {
debug_str_section: R,
}
impl<'input, Endian> DebugStr<EndianBuf<'input, Endian>>
where
Endian: Endianity,
{
/// Construct a new `DebugStr` instance from the data in the `.debug_str`
/// section.
///
/// It is the caller's responsibility to read the `.debug_str` section and
/// present it as a `&[u8]` slice. That means using some ELF loader on
/// Linux, a Mach-O loader on OSX, etc.
///
/// ```
/// use gimli::{DebugStr, LittleEndian};
///
/// # let buf = [0x00, 0x01, 0x02, 0x03];
/// # let read_debug_str_section_somehow = || &buf;
/// let debug_str = DebugStr::new(read_debug_str_section_somehow(), LittleEndian);
/// ```
pub fn new(debug_str_section: &'input [u8], endian: Endian) -> Self {
Self::from(EndianBuf::new(debug_str_section, endian))
}
}
impl<R: Reader> DebugStr<R> {
/// Lookup a string from the `.debug_str` section by DebugStrOffset.
///
/// ```
/// use gimli::{DebugStr, DebugStrOffset, LittleEndian};
///
/// # let buf = [0x01, 0x02, 0x00];
/// # let offset = DebugStrOffset(0);
/// # let read_debug_str_section_somehow = || &buf;
/// # let debug_str_offset_somehow = || offset;
/// let debug_str = DebugStr::new(read_debug_str_section_somehow(), LittleEndian);
/// println!("Found string {:?}", debug_str.get_str(debug_str_offset_somehow()));
/// ```
pub fn get_str(&self, offset: DebugStrOffset<R::Offset>) -> Result<R> {
let input = &mut self.debug_str_section.clone();
input.skip(offset.0)?;
input.read_null_terminated_slice()
}
}
impl<R: Reader> Section<R> for DebugStr<R> {
fn section_name() -> &'static str {
".debug_str"
}
}
impl<R: Reader> From<R> for DebugStr<R> {
fn from(debug_str_section: R) -> Self {
DebugStr { debug_str_section }
}
}