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if not modules then modules = { } end modules ['util-tab'] = {
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"
}
utilities = utilities or {}
utilities.tables = utilities.tables or { }
local tables = utilities.tables
local format, gmatch = string.format, string.gmatch
local concat, insert, remove = table.concat, table.insert, table.remove
function tables.definetable(target) -- defines undefined tables
local composed, t = nil, { }
for name in gmatch(target,"([^%.]+)") do
if composed then
composed = composed .. "." .. name
else
composed = name
end
t[#t+1] = format("%s = %s or { }",composed,composed)
end
return concat(t,"\n")
end
function tables.accesstable(target)
local t = _G
for name in gmatch(target,"([^%.]+)") do
t = t[name]
end
return t
end
function table.removevalue(t,value) -- todo: n
if value then
for i=1,#t do
if t[i] == value then
remove(t,i)
-- remove all, so no: return
end
end
end
end
function table.insertbeforevalue(t,value,extra)
for i=1,#t do
if t[i] == extra then
remove(t,i)
end
end
for i=1,#t do
if t[i] == value then
insert(t,i,extra)
return
end
end
insert(t,1,extra)
end
function table.insertaftervalue(t,value,extra)
for i=1,#t do
if t[i] == extra then
remove(t,i)
end
end
for i=1,#t do
if t[i] == value then
insert(t,i+1,extra)
return
end
end
insert(t,#t+1,extra)
end
local _empty_table_ = { __index = function(t,k) return "" end }
function table.setemptymetatable(t)
setmetatable(t,_empty_table_)
end
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