lunka_src/
platforms.rs

1//! Lua platform handling.
2
3/// Trait for a Lua platform.
4pub trait Platform {
5	fn defines(&self) -> &[&str];
6	fn standards(&self) -> &Standards<'_>;
7}
8
9/// Trait for a known, constant Lua platform.
10pub trait ConstPlatform {
11	const DEFINES: &'static [&'static str];
12	const STANDARDS: Standards<'static> = Standards {
13		gnu: Some("gnu99"),
14		clang: Some("gnu99"),
15		msvc: Some("c99"),
16		clang_cl: Some("gnu99"),
17	};
18}
19impl<T: ConstPlatform> Platform for T {
20	fn defines(&self) -> &[&str] {
21		Self::DEFINES
22	}
23	fn standards(&self) -> &Standards<'_> {
24		&Self::STANDARDS
25	}
26}
27
28macro_rules! platform {
29	{
30		$(#[$attr:meta])*
31		$vis:vis struct $name:ident;
32		DEFINES = $defines:expr;
33		$(STANDARDS = $standards:expr;)?
34	} => {
35		#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
36		$(#[$attr])*
37		$vis struct $name;
38
39		impl ConstPlatform for $name {
40			const DEFINES: &[&str] = $defines;
41			$(const STANDARDS: Standards<'_> = $standards;)?
42		}
43	};
44}
45
46platform! {
47	pub struct Aix;
48	DEFINES = &[
49		"LUA_USE_POSIX",
50		"LUA_USE_DLOPEN",
51	];
52}
53
54platform! {
55	pub struct Bsd;
56	DEFINES = &[
57		"LUA_USE_POSIX",
58		"LUA_USE_DLOPEN",
59	];
60}
61
62platform! {
63	pub struct C89;
64	DEFINES = &[
65		"LUA_USE_POSIX",
66		"LUA_USE_DLOPEN",
67	];
68	STANDARDS = Standards {
69		gnu: Some("c89"),
70		clang: Some("c89"),
71		msvc: None,
72		clang_cl: Some("c89"),
73	};
74}
75
76platform! {
77	pub struct FreeBsd;
78	DEFINES = &[
79		"LUA_USE_LINUX",
80	];
81}
82
83platform! {
84	pub struct Ios;
85	DEFINES = &[
86		"LUA_USE_IOS",
87	];
88}
89
90platform! {
91	pub struct Linux;
92	DEFINES = &[
93		"LUA_USE_LINUX",
94	];
95}
96
97platform! {
98	pub struct MacOsX;
99	DEFINES = &[
100		"LUA_USE_MACOSX",
101	];
102}
103
104platform! {
105	pub struct MinGw;
106	DEFINES = &[
107		"LUA_BUILD_AS_DLL",
108	];
109}
110
111platform! {
112	pub struct Posix;
113	DEFINES = &[
114		"LUA_USE_POSIX",
115	];
116}
117
118platform! {
119	pub struct Solaris;
120	DEFINES = &[
121		"LUA_USE_POSIX",
122		"LUA_USE_DLOPEN",
123		"_REENTRANT",
124	];
125}
126
127platform! {
128	pub struct Windows;
129	DEFINES = &[
130		"LUA_USE_WINDOWS",
131	];
132}
133
134/// Collection of C standard identifiers for different kinds of compilers.
135#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
136pub struct Standards<'a> {
137	pub gnu: Option<&'a str>,
138	pub clang: Option<&'a str>,
139	pub msvc: Option<&'a str>,
140	pub clang_cl: Option<&'a str>,
141}
142
143struct DynPlatform {
144	pub defines: &'static [&'static str],
145	pub standards: &'static Standards<'static>,
146}
147
148impl DynPlatform {
149	/// Collect information about a [`ConstPlatform`] into this structure.
150	pub const fn new<P: ConstPlatform>() -> Self {
151		Self {
152			defines: P::DEFINES,
153			standards: &P::STANDARDS,
154		}
155	}
156}
157
158impl Platform for DynPlatform {
159	fn defines(&self) -> &[&str] {
160		self.defines
161	}
162	fn standards(&self) -> &Standards<'_> {
163		self.standards
164	}
165}
166
167/// Current target triple.
168pub const CURRENT_TRIPLE: &str = current_platform::CURRENT_PLATFORM;
169
170/// Get an appropriate [`Platform`] for the target triple used for compilation.
171pub fn from_current_triple() -> Option<impl Platform> {
172	from_target_triple(CURRENT_TRIPLE)
173}
174
175/// Get an appropriate [`Platform`] for the given target triple.
176pub fn from_target_triple(target: &str) -> Option<impl Platform> {
177	if target.contains("linux") {
178		Some(DynPlatform::new::<Linux>())
179	} else if target.ends_with("bsd") {
180		Some(DynPlatform::new::<FreeBsd>())
181	} else if target.ends_with("apple-darwin") {
182		Some(DynPlatform::new::<MacOsX>())
183	} else if target.ends_with("apple-ios") {
184		Some(DynPlatform::new::<Ios>())
185	} else if target.ends_with("solaris") {
186		Some(DynPlatform::new::<Solaris>())
187	} else if target.contains("windows") {
188		Some(DynPlatform::new::<Windows>())
189	} else {
190		None
191	}
192}
lunka_src/platforms.rs

lunka_src/
platforms.rs
