Version 0.0.1

[guestfs-browser.git] / utils.ml

diff --git a/utils.ml b/utils.ml
index 8f7ce3a..a3eca86 100644 (file)
--- a/utils.ml
+++ b/utils.ml
@@ -16,17 +16,47 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-type ('a, 'b) choice = Either of 'a | Or of 'b
+open Printf
 
-let verbose = ref true (* XXX settable *)
+let (+^) = Int64.add
+let (-^) = Int64.sub
+let ( *^ ) = Int64.mul
+let (/^) = Int64.div
+
+type ('a, 'b) either = Left of 'a | Right of 'b
+
+let verbose = ref false
+let set_verbose_flag () = verbose := true
+let verbose () = !verbose
+
+let write_flag = ref false
+let set_write_flag () = write_flag := true
+let write_flag () = !write_flag
 
 let debug fs =
-  let f str = if !verbose then (prerr_string str; prerr_newline ()) in
+  let f str =
+    if verbose () then (
+      prerr_string Config.package;
+      prerr_string ": ";
+      prerr_string str;
+      prerr_newline ()
+    )
+  in
   ksprintf f fs
 
 let failwith fs =
   let f str =
-    if !verbose then (prerr_string str; prerr_newline ());
+    if verbose () then (prerr_string str; prerr_newline ());
     raise (Failure str)
   in
   ksprintf f fs
+
+let utf8_rarrow = "\xe2\x86\x92"
+
+let human_size_1k i =
+  if i < 1024L then
+    sprintf "%LdK" i
+  else if i < 1024L *^ 1024L then
+    sprintf "%.1fM" (Int64.to_float i /. 1024.)
+  else
+    sprintf "%.1fG" (Int64.to_float i /. 1024. /. 1024.)