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

use std::convert::TryInto;

/// Enum representing the architecture of a process
#[derive(Clone, Debug, Copy)]
#[repr(u8)]
pub enum Architecture {
    /// 8-bit architecture
    #[cfg(any(
        target_pointer_width = "8",
        target_pointer_width = "16",
        target_pointer_width = "32",
        target_pointer_width = "64",
        target_pointer_width = "128"
    ))]
    Arch8Bit = 1,
    /// 16-bit architecture
    #[cfg(any(
        target_pointer_width = "16",
        target_pointer_width = "32",
        target_pointer_width = "64",
        target_pointer_width = "128"
    ))]
    Arch16Bit = 2,
    /// 32-bit architecture
    #[cfg(any(
        target_pointer_width = "32",
        target_pointer_width = "64",
        target_pointer_width = "128"
    ))]
    Arch32Bit = 4,
    /// 64-bit architecture
    #[cfg(any(target_pointer_width = "64", target_pointer_width = "128"))]
    Arch64Bit = 8,
    /// 128-bit architecture
    #[cfg(target_pointer_width = "128")]
    Arch128Bit = 16,
}

impl Architecture {
    /// Create an Architecture matching that of the host process.
    #[must_use]
    pub fn from_native() -> Architecture {
        #[cfg(target_pointer_width = "8")]
        return Architecture::Arch8Bit;
        #[cfg(target_pointer_width = "16")]
        return Architecture::Arch16Bit;
        #[cfg(target_pointer_width = "32")]
        return Architecture::Arch32Bit;
        #[cfg(target_pointer_width = "64")]
        return Architecture::Arch64Bit;
        #[cfg(target_pointer_width = "128")]
        return Architecture::Arch128Bit;
    }

    /// Convert bytes read from memory into a pointer in the
    /// current architecture.
    #[must_use]
    pub fn pointer_from_ne_bytes(self, bytes: &[u8]) -> usize {
        match self {
            #[allow(clippy::cast_possible_truncation)]
            #[cfg(any(
                target_pointer_width = "8",
                target_pointer_width = "16",
                target_pointer_width = "32",
                target_pointer_width = "64",
                target_pointer_width = "128"
            ))]
            Architecture::Arch8Bit => u8::from_ne_bytes(bytes.try_into().unwrap()) as usize,
            #[allow(clippy::cast_possible_truncation)]
            #[cfg(any(
                target_pointer_width = "16",
                target_pointer_width = "32",
                target_pointer_width = "64",
                target_pointer_width = "128"
            ))]
            Architecture::Arch16Bit => u16::from_ne_bytes(bytes.try_into().unwrap()) as usize,
            #[allow(clippy::cast_possible_truncation)]
            #[cfg(any(
                target_pointer_width = "32",
                target_pointer_width = "64",
                target_pointer_width = "128"
            ))]
            Architecture::Arch32Bit => u32::from_ne_bytes(bytes.try_into().unwrap()) as usize,
            #[allow(clippy::cast_possible_truncation)]
            #[cfg(any(target_pointer_width = "64", target_pointer_width = "128"))]
            Architecture::Arch64Bit => u64::from_ne_bytes(bytes.try_into().unwrap()) as usize,
            #[allow(clippy::cast_possible_truncation)]
            #[cfg(target_pointer_width = "128")]
            Architecture::Arch128Bit => u128::from_ne_bytes(bytes.try_into().unwrap()) as usize,
        }
    }
}