1 files changed, 39 insertions, 3 deletions
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 41ed20fdc..03b817496 100644
--- a/tex/generic/context/luatex/luatex-fonts-merged.lua
+++ b/tex/generic/context/luatex/luatex-fonts-merged.lua
@@ -1,6 +1,6 @@
 -- merged file : luatex-fonts-merged.lua
 -- parent file : luatex-fonts.lua
--- merge date  : 11/01/13 12:20:30
+-- merge date  : 11/01/13 15:02:08
 
 do -- begin closure to overcome local limits and interference
 
@@ -2613,6 +2613,31 @@ function number.signed(i)
     return "-",-i
   end
 end
+local zero=P("0")^1/""
+local plus=P("+")/""
+local minus=P("-")
+local separator=S(".")
+local digit=R("09")
+local trailing=zero^1*#S("eE")
+local exponent=(S("eE")*(plus+Cs((minus*zero^0*P(-1))/"")+minus)*zero^0*(P(-1)*Cc("0")+P(1)^1))
+local pattern_a=Cs(minus^0*digit^1*(separator/""*trailing+separator*(trailing+digit)^0)*exponent)
+local pattern_b=Cs((exponent+P(1))^0)
+function number.sparseexponent(f,n)
+  if not n then
+    n=f
+    f="%e"
+  end
+  local tn=type(n)
+  if tn=="string" then 
+    local m=tonumber(n)
+    if m then
+      return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,m))
+    end
+  elseif tn=="number" then
+    return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,n))
+  end
+  return tostring(n)
+end
 local preamble=[[
 local type = type
 local tostring = tostring
@@ -2631,6 +2656,7 @@ local autosingle = string.autosingle
 local autodouble = string.autodouble
 local sequenced = table.sequenced
 local formattednumber = number.formatted
+local sparseexponent = number.sparseexponent
 ]]
 local template=[[
 %s
@@ -2703,6 +2729,14 @@ local format_E=function(f)
   n=n+1
   return format("format('%%%sE',a%s)",f,n)
 end
+local format_j=function(f)
+  n=n+1
+  return format("sparseexponent('%%%se',a%s)",f,n)
+end
+local format_J=function(f)
+  n=n+1
+  return format("sparseexponent('%%%sE',a%s)",f,n)
+end
 local format_x=function(f)
   n=n+1
   return format("format('%%%sx',a%s)",f,n)
@@ -2893,11 +2927,11 @@ local builder=Cs { "start",
 +V("c")+V("C")+V("S") 
 +V("Q") 
 +V("N")
-+V("r")+V("h")+V("H")+V("u")+V("U")+V("p")+V("b")+V("t")+V("T")+V("l")+V("L")+V("I")+V("h") 
-+V("w") 
++V("r")+V("h")+V("H")+V("u")+V("U")+V("p")+V("b")+V("t")+V("T")+V("l")+V("L")+V("I")+V("w") 
 +V("W") 
 +V("a") 
 +V("A") 
++V("j")+V("J") 
 +V("m")+V("M")
 +V("*") 
       )+V("*")
@@ -2934,6 +2968,8 @@ local builder=Cs { "start",
   ["I"]=(prefix_any*P("I"))/format_I,
   ["w"]=(prefix_any*P("w"))/format_w,
   ["W"]=(prefix_any*P("W"))/format_W,
+  ["j"]=(prefix_any*P("j"))/format_j,
+  ["J"]=(prefix_any*P("J"))/format_J,
   ["m"]=(prefix_tab*P("m"))/format_m,
   ["M"]=(prefix_tab*P("M"))/format_M,
   ["a"]=(prefix_any*P("a"))/format_a,