Update 'size-of' and move to extra from unmaintained

extra/size-of/size-of.factor

@@ -0,0 +1,38 @@
+
+USING: io io.encodings.ascii io.files io.files.temp io.launcher
+       locals math.parser sequences sequences.deep ;
+
+IN: size-of
+
+! Use 'size-of' to find out the size in bytes of a C type.
+!
+! The 'headers' argument is a list of header files to use. You may
+! pass 'f' to only use 'stdio.h'.
+!
+! Examples:
+! 
+!   f "int" size-of .
+! 
+!   { "X11/Xlib.h" } "XAnyEvent" size-of .
+
+:: size-of ( HEADERS TYPE -- n )
+
+  [let | C-FILE   [ "size-of.c" temp-file ]
+         EXE-FILE [ "size-of"   temp-file ]
+         INCLUDES [ HEADERS [| FILE | { "#include <" FILE ">" } concat ] map ] |
+
+    {
+      "#include <stdio.h>"
+      INCLUDES
+      "main() { printf( \"%i\" , sizeof( " TYPE " ) ) ; }"
+    }
+
+    flatten C-FILE  ascii  set-file-lines
+
+    { "gcc" C-FILE "-o" EXE-FILE } try-process
+
+    EXE-FILE ascii <process-reader> contents string>number ] ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+