--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/druntime/import/stdc/fenv.d	Wed Nov 12 00:19:18 2008 +0100
@@ -0,0 +1,137 @@
+/**
+ * D header file for C99.
+ *
+ * Copyright: Public Domain
+ * License:   Public Domain
+ * Authors:   Sean Kelly, Walter Bright
+ * Standards: ISO/IEC 9899:1999 (E)
+ */
+module stdc.fenv;
+
+extern (C):
+
+version( Windows )
+{
+    struct fenv_t
+    {
+        ushort    status;
+        ushort    control;
+        ushort    round;
+        ushort[2] reserved;
+    }
+
+    alias int fexcept_t;
+}
+else version( linux )
+{
+    struct fenv_t
+    {
+        ushort __control_word;
+        ushort __unused1;
+        ushort __status_word;
+        ushort __unused2;
+        ushort __tags;
+        ushort __unused3;
+        uint   __eip;
+        ushort __cs_selector;
+        ushort __opcode;
+        uint   __data_offset;
+        ushort __data_selector;
+        ushort __unused5;
+    }
+
+    alias int fexcept_t;
+}
+else version ( darwin )
+{
+    version ( BigEndian )
+    {
+        alias uint fenv_t;
+        alias uint fexcept_t;
+    }
+    version ( LittleEndian )
+    {
+        struct fenv_t
+        {
+            ushort  __control;
+            ushort  __status;
+            uint    __mxcsr;
+            byte[8] __reserved;
+        }
+
+        alias ushort fexcept_t;
+    }
+}
+else version ( freebsd )
+{
+    struct fenv_t
+    {
+        ushort __control;
+        ushort __mxcsr_hi;
+        ushort __status;
+        ushort __mxcsr_lo;
+        uint __tag;
+        byte[16] __other;
+    }
+
+    alias ushort fexcept_t;
+}
+else
+{
+    static assert( false );
+}
+
+enum
+{
+    FE_INVALID      = 1,
+    FE_DENORMAL     = 2, // non-standard
+    FE_DIVBYZERO    = 4,
+    FE_OVERFLOW     = 8,
+    FE_UNDERFLOW    = 0x10,
+    FE_INEXACT      = 0x20,
+    FE_ALL_EXCEPT   = 0x3F,
+    FE_TONEAREST    = 0,
+    FE_UPWARD       = 0x800,
+    FE_DOWNWARD     = 0x400,
+    FE_TOWARDZERO   = 0xC00,
+}
+
+version( Windows )
+{
+    private extern fenv_t _FE_DFL_ENV;
+    fenv_t* FE_DFL_ENV = &_FE_DFL_ENV;
+}
+else version( linux )
+{
+    fenv_t* FE_DFL_ENV = cast(fenv_t*)(-1);
+}
+else version( darwin )
+{
+    private extern fenv_t _FE_DFL_ENV;
+    fenv_t* FE_DFL_ENV = &_FE_DFL_ENV;
+}
+else version( freebsd )
+{
+    private extern fenv_t __fe_dfl_env;
+    fenv_t* FE_DFL_ENV = &__fe_dfl_env;
+}
+else
+{
+    static assert( false );
+}
+
+void feraiseexcept(int excepts);
+void feclearexcept(int excepts);
+
+int fetestexcept(int excepts);
+int feholdexcept(fenv_t* envp);
+
+void fegetexceptflag(fexcept_t* flagp, int excepts);
+void fesetexceptflag(in fexcept_t* flagp, int excepts);
+
+int fegetround();
+int fesetround(int round);
+
+void fegetenv(fenv_t* envp);
+void fesetenv(in fenv_t* envp);
+void feupdateenv(in fenv_t* envp);