1 files changed, 11 insertions, 1 deletions
diff --git a/tex/context/base/meta-ini.lua b/tex/context/base/meta-ini.lua
index 5b1f89463..bac1429ae 100644
--- a/tex/context/base/meta-ini.lua
+++ b/tex/context/base/meta-ini.lua
@@ -7,7 +7,7 @@ if not modules then modules = { } end modules ['meta-ini'] = {
 }
 
 local tonumber = tonumber
-local format, gmatch, match = string.format, string.gmatch, string.match
+local format, gmatch, match, gsub = string.format, string.gmatch, string.match, string.gsub
 
 metapost = metapost or { }
 
@@ -90,3 +90,13 @@ function commands.prepareMPvariable(v) -- slow but ok
         end
     end
 end
+
+function metapost.formatnumber(f,n) -- just lua format
+    f = gsub(f,"@(%d)","%%.%1")
+    f = gsub(f,"@","%%")
+    f = format(f,tonumber(n) or 0)
+    f = gsub(f,"e([%+%-%d]+)",function(s)
+        return format("\\times10^{%s}",tonumber(s) or s) -- strips leading zeros
+    end)
+    context.mathematics(f)
+end