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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

pub use self::Os::*;
pub use self::Abi::*;
pub use self::Architecture::*;
pub use self::AbiArchitecture::*;

use std::fmt;

#[derive(Copy, PartialEq, Eq, Debug)]
pub enum Os {
    OsWindows,
    OsMacos,
    OsLinux,
    OsAndroid,
    OsFreebsd,
    OsiOS,
    OsDragonfly,
    OsBitrig,
    OsOpenbsd,
}

#[derive(PartialEq, Eq, Hash, RustcEncodable, RustcDecodable, Clone, Copy, Debug)]
pub enum Abi {
    // NB: This ordering MUST match the AbiDatas array below.
    // (This is ensured by the test indices_are_correct().)

    // Single platform ABIs come first (`for_arch()` relies on this)
    Cdecl,
    Stdcall,
    Fastcall,
    Aapcs,
    Win64,

    // Multiplatform ABIs second
    Rust,
    C,
    System,
    RustIntrinsic,
    RustCall,
}

#[allow(non_camel_case_types)]
#[derive(Copy, PartialEq, Debug)]
pub enum Architecture {
    X86,
    X86_64,
    Arm,
    Mips,
    Mipsel
}

#[derive(Copy)]
pub struct AbiData {
    abi: Abi,

    // Name of this ABI as we like it called.
    name: &'static str,
}

#[derive(Copy)]
pub enum AbiArchitecture {
    /// Not a real ABI (e.g., intrinsic)
    RustArch,
    /// An ABI that specifies cross-platform defaults (e.g., "C")
    AllArch,
    /// Multiple architectures (bitset)
    Archs(u32)
}

#[allow(non_upper_case_globals)]
static AbiDatas: &'static [AbiData] = &[
    // Platform-specific ABIs
    AbiData {abi: Cdecl, name: "cdecl" },
    AbiData {abi: Stdcall, name: "stdcall" },
    AbiData {abi: Fastcall, name:"fastcall" },
    AbiData {abi: Aapcs, name: "aapcs" },
    AbiData {abi: Win64, name: "win64" },

    // Cross-platform ABIs
    //
    // NB: Do not adjust this ordering without
    // adjusting the indices below.
    AbiData {abi: Rust, name: "Rust" },
    AbiData {abi: C, name: "C" },
    AbiData {abi: System, name: "system" },
    AbiData {abi: RustIntrinsic, name: "rust-intrinsic" },
    AbiData {abi: RustCall, name: "rust-call" },
];

/// Returns the ABI with the given name (if any).
pub fn lookup(name: &str) -> Option<Abi> {
    AbiDatas.iter().find(|abi_data| name == abi_data.name).map(|&x| x.abi)
}

pub fn all_names() -> Vec<&'static str> {
    AbiDatas.iter().map(|d| d.name).collect()
}

impl Abi {
    #[inline]
    pub fn index(&self) -> usize {
        *self as usize
    }

    #[inline]
    pub fn data(&self) -> &'static AbiData {
        &AbiDatas[self.index()]
    }

    pub fn name(&self) -> &'static str {
        self.data().name
    }
}

impl fmt::Display for Abi {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "\"{}\"", self.name())
    }
}

impl fmt::Display for Os {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            OsLinux => "linux".fmt(f),
            OsWindows => "windows".fmt(f),
            OsMacos => "macos".fmt(f),
            OsiOS => "ios".fmt(f),
            OsAndroid => "android".fmt(f),
            OsFreebsd => "freebsd".fmt(f),
            OsDragonfly => "dragonfly".fmt(f),
            OsBitrig => "bitrig".fmt(f),
            OsOpenbsd => "openbsd".fmt(f),
        }
    }
}

#[allow(non_snake_case)]
#[test]
fn lookup_Rust() {
    let abi = lookup("Rust");
    assert!(abi.is_some() && abi.unwrap().data().name == "Rust");
}

#[test]
fn lookup_cdecl() {
    let abi = lookup("cdecl");
    assert!(abi.is_some() && abi.unwrap().data().name == "cdecl");
}

#[test]
fn lookup_baz() {
    let abi = lookup("baz");
    assert!(abi.is_none());
}

#[test]
fn indices_are_correct() {
    for (i, abi_data) in AbiDatas.iter().enumerate() {
        assert_eq!(i, abi_data.abi.index());
    }
}