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author | Taco Hoekwater <taco@elvenkind.com> | 2008-06-12 10:42:53 +0000 |
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committer | Taco Hoekwater <taco@elvenkind.com> | 2008-06-12 10:42:53 +0000 |
commit | 0d01365d53c456d246da0ca1f0b3cd9868f02b35 (patch) | |
tree | 01a655c8028e17cfb371456b299c1848fe08c05b /Master/texmf-dist/tex/context/base/l-boolean.lua | |
parent | 44f3714442da07fdfc36a7f2a8dcd5d4294c5d26 (diff) |
ConTeXt release 2008.05.21
git-svn-id: svn://tug.org/texlive/trunk@8691 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/context/base/l-boolean.lua')
-rw-r--r-- | Master/texmf-dist/tex/context/base/l-boolean.lua | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/l-boolean.lua b/Master/texmf-dist/tex/context/base/l-boolean.lua new file mode 100644 index 00000000000..66c608cee50 --- /dev/null +++ b/Master/texmf-dist/tex/context/base/l-boolean.lua @@ -0,0 +1,52 @@ +-- filename : l-boolean.lua +-- comment : split off from luat-lib +-- author : Hans Hagen, PRAGMA-ADE, Hasselt NL +-- copyright: PRAGMA ADE / ConTeXt Development Team +-- license : see context related readme files + +if not versions then versions = { } end versions['l-boolean'] = 1.001 +if not boolean then boolean = { } end + +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" + 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" then + return true + elseif str == "false" or str == "no" or str == "off" then + return false + end + end + return nil +end + +function boolean.alwaystrue() + return true +end + +function boolean.falsetrue() + return false +end |