1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
// Copyright 2021-2022 Vector 35 Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use binaryninjacore_sys::BNFileAccessor;
use std::io::{Read, Seek, SeekFrom, Write};
use std::marker::PhantomData;
use std::slice;
pub struct FileAccessor<'a> {
pub(crate) api_object: BNFileAccessor,
_ref: PhantomData<&'a mut ()>,
}
impl<'a> FileAccessor<'a> {
pub fn new<F>(f: &'a mut F) -> Self
where
F: 'a + Read + Write + Seek + Sized,
{
use std::os::raw::c_void;
extern "C" fn cb_get_length<F>(ctxt: *mut c_void) -> u64
where
F: Read + Write + Seek + Sized,
{
let f = unsafe { &mut *(ctxt as *mut F) };
match f.seek(SeekFrom::End(0)) {
Ok(len) => len,
Err(_) => 0,
}
}
extern "C" fn cb_read<F>(
ctxt: *mut c_void,
dest: *mut c_void,
offset: u64,
len: usize,
) -> usize
where
F: Read + Write + Seek + Sized,
{
let f = unsafe { &mut *(ctxt as *mut F) };
let dest = unsafe { slice::from_raw_parts_mut(dest as *mut u8, len) };
if !f.seek(SeekFrom::Start(offset)).is_ok() {
debug!("Failed to seek to offset {:x}", offset);
return 0;
}
match f.read(dest) {
Ok(len) => len,
Err(_) => 0,
}
}
extern "C" fn cb_write<F>(
ctxt: *mut c_void,
offset: u64,
src: *const c_void,
len: usize,
) -> usize
where
F: Read + Write + Seek + Sized,
{
let f = unsafe { &mut *(ctxt as *mut F) };
let src = unsafe { slice::from_raw_parts(src as *const u8, len) };
if !f.seek(SeekFrom::Start(offset)).is_ok() {
return 0;
}
match f.write(src) {
Ok(len) => len,
Err(_) => 0,
}
}
Self {
api_object: BNFileAccessor {
context: f as *mut F as *mut _,
getLength: Some(cb_get_length::<F>),
read: Some(cb_read::<F>),
write: Some(cb_write::<F>),
},
_ref: PhantomData,
}
}
}
|
