Large reorganization of headers (WIP)

src/header/float/cbindgen.toml

@@ -0,0 +1,7 @@
+sys_includes = ["sys/types.h", "bits/float.h"]
+include_guard = "_FLOAT_H"
+language = "C"
+style = "Tag"
+
+[enum]
+prefix_with_name = true

src/header/float/mod.rs

@@ -0,0 +1,16 @@
+//! float.h implementation for Redox, following
+//! http://pubs.opengroup.org/onlinepubs/7908799/xsh/float.h.html
+
+use header::fenv::{fegetround, FE_TONEAREST};
+use platform;
+use platform::types::*;
+
+pub const FLT_RADIX: c_int = 2;
+
+#[no_mangle]
+pub unsafe extern "C" fn flt_rounds() -> c_int {
+    match fegetround() {
+        FE_TONEAREST => 1,
+        _ => -1,
+    }
+}