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authorKhaled Hosny <khaledhosny@eglug.org>2010-05-10 17:23:06 +0300
committerKhaled Hosny <khaledhosny@eglug.org>2010-05-10 17:23:06 +0300
commit7002dfe5556f503320d9bee480e5fb43bdb6e7a3 (patch)
tree384ee73556657b6818c78b006cfa625776c980cd /lualibs-boolean.lua
parent20864d5fdb81f248500f2e94c95b3b15569cc277 (diff)
downloadlualibs-7002dfe5556f503320d9bee480e5fb43bdb6e7a3.tar.gz
Rename to lualibs
Rename luaextra->lualibs when sensible, also use luatexbase instead of luatextra.
Diffstat (limited to 'lualibs-boolean.lua')
-rw-r--r--lualibs-boolean.lua55
1 files changed, 55 insertions, 0 deletions
diff --git a/lualibs-boolean.lua b/lualibs-boolean.lua
new file mode 100644
index 0000000..be7ec7d
--- /dev/null
+++ b/lualibs-boolean.lua
@@ -0,0 +1,55 @@
+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"
+}
+
+boolean = boolean or { }
+
+local type, tonumber = type, tonumber
+
+function boolean.tonumber(b)
+ if b then return 1 else return 0 end
+end
+
+function toboolean(str,tolerant)
+ if tolerant then
+ local tstr = type(str)
+ if tstr == "string" then
+ return str == "true" or str == "yes" or str == "on" or str == "1" or str == "t"
+ elseif tstr == "number" then
+ return tonumber(str) ~= 0
+ elseif tstr == "nil" then
+ return false
+ else
+ return str
+ end
+ elseif str == "true" then
+ return true
+ elseif str == "false" then
+ return false
+ else
+ return str
+ end
+end
+
+function string.is_boolean(str)
+ if type(str) == "string" then
+ if str == "true" or str == "yes" or str == "on" or str == "t" then
+ return true
+ elseif str == "false" or str == "no" or str == "off" or str == "f" then
+ return false
+ end
+ end
+ return nil
+end
+
+function boolean.alwaystrue()
+ return true
+end
+
+function boolean.falsetrue()
+ return false
+end