add SDL_version APIs

src/sdl2/lib.rs

@@ -31,3 +31,4 @@ pub mod render;
 pub mod rwops;
 pub mod sdl;
 pub mod audio;
+pub mod version;

src/sdl2/version.rs

@@ -0,0 +1,64 @@
+use std::fmt;
+use std::mem;
+use std::c_str::CString;
+
+
+#[allow(non_camel_case_types)]
+pub mod ll {
+    use libc::{uint8_t, c_char, c_int};
+    pub struct SDL_version {
+        pub major: uint8_t,
+        pub minor: uint8_t,
+        pub patch: uint8_t,
+    }
+    extern "C" {
+        pub fn SDL_GetVersion(ver: *mut SDL_version);
+        pub fn SDL_GetRevision() -> *c_char;
+        pub fn SDL_GetRevisionNumber() -> c_int;
+    }
+}
+
+
+#[deriving(Eq, Clone)]
+pub struct Version {
+    pub major: int,
+    pub minor: int,
+    pub patch: int,
+}
+
+impl Version {
+    pub fn from_ll(sv: *ll::SDL_version) -> Version {
+        //! Converts a raw *SDL_version to Version
+        unsafe {
+            let v = *sv;
+            Version{ major: v.major as int, minor: v.minor as int, patch: v.patch as int }
+        }
+    }
+}
+
+impl fmt::Show for Version {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f.buf, "{}.{}.{}", self.major, self.minor, self.patch)
+    }
+}
+
+pub fn get_version() -> Version {
+    unsafe {
+        let mut cver = mem::init::<ll::SDL_version>();
+        ll::SDL_GetVersion(&mut cver);
+        Version::from_ll(&cver)
+    }
+}
+
+pub fn get_revision() -> ~str {
+    unsafe {
+        let ret = ll::SDL_GetRevision();
+        CString::new(ret, false).as_str().unwrap().into_owned()
+    }
+}
+
+pub fn get_revision_number() -> int {
+    unsafe {
+        ll::SDL_GetRevisionNumber() as int
+    }
+}