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if not modules then modules = { } end modules ['spec-pdf'] = {
version = 1.001,
comment = "companion to spec-fdf.tex",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
--[[ldx--
<p>This module implements a couple of cleanup methods. We need these
in order to meet the <l n='pdf'/> specification. Watch the double
parenthesis; they are needed because otherwise we would pass more
than one argument to <l n='tex'/>.</p>
--ldx]]--
local char, byte, format = string.char, string.byte, string.format
local texsprint, texwrite = tex.sprint, tex.write
pdf = pdf or { }
function pdf.cleandestination(str)
texsprint((str:gsub("[%/%#%<%>%[%]%(%)%-%s]+","-")))
end
function pdf.cleandestination(str)
texsprint((str:gsub("[%/%#%<%>%[%]%(%)%-%s]+","-")))
end
function pdf.sanitizedstring(str)
texsprint((str:gsub("([\\/#<>%[%]%(%)])","\\%1")))
end
--~ function pdf.hexify(str)
--~ texwrite("feff" .. utf.gsub(str,".",function(c)
--~ local b = byte(c)
--~ if b < 0x10000 then
--~ return ("%04x"):format(b)
--~ else
--~ return ("%04x%04x"):format(b/1024+0xD800,b%1024+0xDC00)
--~ end
--~ end))
--~ end
function pdf.hexify(str)
texwrite("feff")
for b in str:utfvalues() do
if b < 0x10000 then
texwrite(("%04x"):format(b))
else
texwrite(("%04x%04x"):format(b/1024+0xD800,b%1024+0xDC00))
end
end
end
function pdf.utf8to16(s,offset) -- derived from j. sauter's post on the list
offset = (offset and 0x110000) or 0 -- so, only an offset when true
texwrite(char(offset+254,offset+255))
for c in string.utfvalues(s) do
if c < 0x10000 then
texwrite(char(offset+c/256,offset+c%256))
else
c = c - 0x10000
local c1, c2 = c / 1024 + 0xD800, c % 1024 + 0xDC00
texwrite(char(offset+c1/256,offset+c1%256,offset+c2/256,offset+c2%256))
end
end
end
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