1 files changed, 69 insertions, 0 deletions
diff --git a/src/fontloader/misc/fontloader-l-boolean.lua b/src/fontloader/misc/fontloader-l-boolean.lua
new file mode 100644
index 0000000..8f18d4c
--- /dev/null
+++ b/src/fontloader/misc/fontloader-l-boolean.lua
@@ -0,0 +1,69 @@
+if not modules then modules = { } end modules ['l-boolean'] = {
+    version   = 1.001,
+    comment   = "companion to luat-lib.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local type, tonumber = type, tonumber
+
+boolean = boolean or { }
+local boolean = boolean
+
+function boolean.tonumber(b)
+    if b then return 1 else return 0 end -- test and return or return
+end
+
+function toboolean(str,tolerant) -- global
+    if  str == nil then
+        return false
+    elseif str == false then
+        return false
+    elseif str == true then
+        return true
+    elseif str == "true" then
+        return true
+    elseif str == "false" then
+        return false
+    elseif not tolerant then
+        return false
+    elseif str == 0 then
+        return false
+    elseif (tonumber(str) or 0) > 0 then
+        return true
+    else
+        return str == "yes" or str == "on" or str == "t"
+    end
+end
+
+string.toboolean = toboolean
+
+function string.booleanstring(str)
+    if str == "0" then
+        return false
+    elseif str == "1" then
+        return true
+    elseif str == "" then
+        return false
+    elseif str == "false" then
+        return false
+    elseif str == "true" then
+        return true
+    elseif (tonumber(str) or 0) > 0 then
+        return true
+    else
+        return str == "yes" or str == "on" or str == "t"
+    end
+end
+
+function string.is_boolean(str,default,strict)
+    if type(str) == "string" then
+        if str == "true" or str == "yes" or str == "on" or str == "t" or (not strict and str == "1") then
+            return true
+        elseif str == "false" or str == "no" or str == "off" or str == "f" or (not strict and str == "0") then
+            return false
+        end
+    end
+    return default
+end