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if not modules then modules = { } end modules ['cldf-lmt'] = {
version = 1.001,
comment = "companion to toks-scn.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local random = math.random
local randomseed = math.randomseed
local round = math.round
local abs = math.abs
local scanners = tokens.scanners
local scanword = scanners.word
local scanstring = scanners.string
local scanboolean = scanners.boolean
local scandimen = scanners.dimen
local scanfloat = scanners.float
local scancount = scanners.integer
local scaninteger = scanners.luainteger
local scancardinal = scanners.luacardinal
local scannumber = scanners.luanumber
local scanargument = scanners.argument
local scantoken = scanners.token
local getindex = token.get_index
local texsetdimen = tex.setdimen
local values = tokens.values
local none_code = values.none
local integer_code = values.integer
local cardinal_code = values.cardinal
local dimension_code = values.dimension
local skip_code = values.skip
local boolean_code = values.boolean
local float_code = values.float
local context = context
local floats = { }
local integers = { }
local cardinals = { }
local numbers = { }
-- variables --
interfaces.implement {
name = "luafloat",
public = true,
value = true,
actions = function(b)
local n = scanword()
if b then
context("%.99g",floats[n] or 0)
else
floats[n] = scannumber(true)
-- floats[n] = scanfloat(true)
end
end,
}
interfaces.implement {
name = "luainteger",
public = true,
value = true,
actions = function(b)
local n = scanword()
if b then
context("%i",integers[n] or 0)
else
integers[n] = scaninteger(true)
end
end,
}
interfaces.implement {
name = "luacount",
public = true,
value = true,
actions = function(b)
local n = scanword()
if b then
return integer_code, integers[n] or 0
else
integers[n] = scancount(true)
end
end,
}
interfaces.implement {
name = "luadimen",
public = true,
value = true,
actions = function(b)
local n = scanword()
if b then
return dimension_code, integers[n] or 0
else
integers[n] = scandimen(false,false,true)
end
end,
}
interfaces.implement {
name = "luacardinal",
public = true,
value = true,
actions = function(b)
local n = scanword()
if b then
context("%d",cardinals[n] or 0)
else
cardinals[n] = scancardinal(true)
end
end,
}
interfaces.implement {
name = "luanumber",
public = true,
value = true,
actions = function(b)
local n = scanword()
if b then
context("%d",floats[n] or integers[n] or cardinals[n] or 0)
else
-- floats[n] = scanfloat(true)
floats[n] = scannumber(true)
end
end,
}
interfaces.implement {
name = "luarandom",
public = true,
value = true,
actions = function(b)
if b then
return integer_code, random(scaninteger(),scaninteger())
else
randomseed(scaninteger(true))
end
end,
}
interfaces.floats = floats
interfaces.integers = integers
interfaces.cardinals = cardinals
interfaces.numbers = table.setmetatableindex(function(t,k)
return floats[k] or integers[k] or cardinals[k]
end)
-- arrays --
local arrays = { }
interfaces.arrays = arrays
local newindex = lua.newindex
interfaces.implement {
name = "newarray",
public = true,
protected = true,
arguments = { {
{ "name", "string" },
{ "nx", "integer" },
{ "ny", "integer" },
{ "type", "string" },
} },
actions = function(t)
local name = t.name
if t.name then
local nx = t.nx
local ny = t.ny
local ty = t.type or "integer"
local df = nil
if ty == "integer" or ty == "float" or ty == "dimension" then
df = 0
elseif ty == "boolean" then
df = false
else
ty = nil
end
if nx and ty ~= nil then
local data
if ny then
data = newindex(t.ny)
for i=1,ny do
data[i] = newindex(nx,df)
end
else
data = newindex(nx,df)
end
arrays[name] = data
data.nx = nx
data.ny = ny
data.type = ty
if ty == "integer" then
data.scanner = scancount
elseif ty == "boolean" then
data.scanner = scanboolean
elseif ty == "dimension" then
data.scanner = scandimen
elseif ty == "float" then
data.scanner = scanfloat
end
if ty == "integer" then
data.code = integer_code
elseif ty == "boolean" then
data.code = boolean_code
elseif ty == "dimension" then
data.code = dimension_code
elseif ty == "float" then
data.code = float_code
end
end
end
end,
}
interfaces.implement {
name = "arrayvalue",
public = true,
value = true,
actions = function(b)
local name = scanstring()
if name then
local a = arrays[name]
if a then
local nx = a.nx
local ny = a.ny
local d = a
if ny then
d = d[scaninteger()]
end
local x = scaninteger()
if b then
local code = a.code
if code == float_code then
context("%.99g",d[x])
else
return code, d[x]
end
else
d[x] = a.scanner()
end
end
end
end,
}
interfaces.implement {
name = "arrayequals",
public = true,
value = true,
actions = function(b)
local name = scanstring()
if name then
local a = arrays[name]
if a then
local nx = a.nx
local ny = a.ny
local d = a
if ny then
d = d[scaninteger()]
end
local x = scaninteger()
if b then
return boolean_code, a.scanner() == d[x]
end
end
end
end,
}
interfaces.implement {
name = "arraycompare",
public = true,
value = true,
actions = function(b)
local name = scanstring()
if name then
local a = arrays[name]
if a then
local nx = a.nx
local ny = a.ny
local d = a
if ny then
d = d[scaninteger()]
end
local x = scaninteger()
if b then
local v = a.scanner()
local d = d[x]
if d < v then
return integer_code, 0
elseif d == v then
return integer_code, 1
else
return integer_code, 2
end
end
end
end
end,
}
interfaces.implement {
name = "showarray",
public = true,
protected = true,
actions = function()
local name = scanstring()
if name then
inspect(arrays[name])
end
end,
}
-- expressions --
local cache = table.setmetatableindex(function(t,k)
local code = "return function() local n = interfaces.numbers local a = interfaces.arrays return " .. k .. " end"
code = loadstring(code)
if code then
code = code()
end
t[k] = code or false
return code
end)
table.makeweak(cache)
interfaces.implement {
name = "luaexpression",
public = true,
actions = function()
local how = scanword()
local code = cache[scanargument()]
if code then
local result = code()
if result then
if not how then
context(tostring(code()))
elseif how == "float" then
context("%.99g",result)
elseif how == "integer" then
context("%i",round(result))
elseif how == "cardinal" then
context("%d",abs(round(result)))
elseif how == "dimen" then
context("%p",result)
elseif how == "boolean" then
context("%d",result and 1 or 0)
elseif how == "lua" then
context("%q",result)
else
context(tostring(code()))
end
end
end
end
}
local dimenfactors = number.dimenfactors
interfaces.implement {
name = "nodimen",
public = true,
value = true,
actions = function(b)
if b then
local how = scanword()
local what = scandimen()
if how then
local factor = dimenfactors[how]
if factor then
context("%.6N%s",factor*what,how)
else
return dimension_code, what
end
else
return dimension_code, what
end
else
local t = scantoken()
if t then
local i = getindex(t)
if i then
local d = scandimen(false,false,true)
texsetdimen(i,d)
end
end
end
end,
}
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