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luametalatex-pdf-resources.lua

@@ -0,0 +1,37 @@
+local format = string.format
+local concat = table.concat
+local next = next
+
+local temp_table = {}
+local resources_meta = {
+  __index = function(t, k)
+    local v = {}
+    t[k] = v
+    return v
+  end,
+  __call = function(t, additional)
+    local temp_table = temp_table
+    local i=1
+    local next_init = '<</%s<<'
+    for kind, entries in next, t do
+      temp_table[i] = format(next_init, kind)
+      next_init = '>>/%s<<'
+      i = i+1
+      for name, entry in next, entries do
+        temp_table[i] = format('/%s %i 0 R', name, entry)
+        i = i+1
+      end
+    end
+    if i == 1 then return format('<<%s>>', additional or '') end
+    temp_table[i] = format('>>%s>>', additional or '')
+    local result = concat(temp_table)
+    for j=1,i do
+      temp_table[j] = nil
+    end
+    return result
+  end,
+}
+
+return function(t)
+  return setmetatable(t or {}, resources_meta)
+end