pe_assembler/formats/exe/reader/
mod.rs

1use crate::{
2    helpers::{
3        pe_reader::{read_pe_head, read_pe_program, read_pe_section_headers},
4        PeReader,
5    },
6    types::{PeHeader, PeInfo, PeProgram, SectionHeader},
7};
8use gaia_types::{GaiaDiagnostics, GaiaError};
9use std::io::{Read, Seek, SeekFrom};
10
11/// EXE 结构，惰性读取器
12#[derive(Debug)]
13pub struct ExeReader<R> {
14    reader: R,
15    exe_header: Option<PeHeader>,
16    exe_info: Option<PeInfo>,
17    exe_section_headers: Option<Vec<SectionHeader>>,
18    exe_program: Option<PeProgram>,
19    errors: Vec<GaiaError>,
20}
21
22impl<R: Read> Read for ExeReader<R> {
23    fn read(&mut self, buffer: &mut [u8]) -> std::io::Result<usize> {
24        self.reader.read(buffer)
25    }
26}
27
28impl<R: Seek> Seek for ExeReader<R> {
29    fn seek(&mut self, position: SeekFrom) -> std::io::Result<u64> {
30        self.reader.seek(position)
31    }
32}
33
34impl<R> ExeReader<R> {
35    pub fn new(reader: R) -> Self {
36        Self { reader, exe_header: None, exe_section_headers: None, exe_program: None, exe_info: None, errors: vec![] }
37    }
38
39    pub fn finish(mut self) -> GaiaDiagnostics<PeProgram>
40    where
41        R: Read + Seek,
42    {
43        if self.exe_program.is_none() {
44            if let Err(e) = read_pe_program(&mut self) {
45                return GaiaDiagnostics { result: Err(e), diagnostics: self.errors };
46            }
47        }
48        unsafe {
49            let exe = self.exe_program.unwrap_unchecked();
50            GaiaDiagnostics { result: Ok(exe), diagnostics: self.errors }
51        }
52    }
53}
54
55impl<R: Read + Seek> PeReader<R> for ExeReader<R> {
56    fn get_viewer(&mut self) -> &mut R {
57        &mut self.reader
58    }
59
60    fn add_diagnostics(&mut self, error: impl Into<GaiaError>) {
61        self.errors.push(error.into());
62    }
63
64    fn get_section_headers(&mut self) -> Result<&[SectionHeader], GaiaError> {
65        if self.exe_section_headers.is_none() {
66            self.exe_section_headers = Some(read_pe_section_headers(self)?);
67        }
68        unsafe { Ok(self.exe_section_headers.as_ref().unwrap_unchecked()) }
69    }
70
71    fn get_pe_header(&mut self) -> Result<&PeHeader, GaiaError> {
72        if self.exe_header.is_none() {
73            self.exe_header = Some(read_pe_head(self)?)
74        }
75        unsafe { Ok(self.exe_header.as_ref().unwrap_unchecked()) }
76    }
77
78    fn get_program(&mut self) -> Result<&PeProgram, GaiaError> {
79        if self.exe_program.is_none() {
80            self.exe_program = Some(read_pe_program(self)?);
81        }
82        unsafe { Ok(self.exe_program.as_ref().unwrap_unchecked()) }
83    }
84}
pe_assembler/formats/exe/reader/mod.rs

pe_assembler/formats/exe/reader/
mod.rs
