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if not modules then modules = { } end modules ['libs-imp-foreign'] = {
version = 1.001,
comment = "companion to luat-imp-foreign.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- See libs-imp-foreign.mkxl for some comments.
local report = logs.reporter("foreign")
local libname = "foreign"
----- libfile = "libffi-7"
local libfile = "libffi*"
----- libfile = "d:/inkscape/bin/libffi-7.dll" -- libffi*
local libforeign = resolvers.libraries.validoptional(libname)
if package.loaded[libname] then
return package.loaded[libname]
end
local function okay()
-- Don't worry, when one overloads this flag the engine will abort with an
-- error message anyway, but it's less nice.
if not status.permit_loadlib then
report()
report("opening foreign libraries is not enabled")
report()
os.exit()
elseif libforeign and resolvers.libraries.optionalloaded(libname,libfile) then
okay = function() return true end
else
okay = function() return false end
end
return okay()
end
local foreignload = libforeign.load
local foreign = {
types = libforeign.types,
abivalues = libforeign.abivalues,
totable = libforeign.totable,
load = function(name)
if okay() then
local fullname = resolvers.findlib(name)
if fullname and fullname ~= "" then
return foreignload(fullname)
else
-- report an error
end
end
end,
}
-- In due time I'll add the struct and array methods using Lua 5.4 features.
package .loaded[libname] = foreign
optional.loaded[libname] = foreign
return foreign
-- A simple test:
-- \setupbodyfont[dejavu,10pt]
--
-- \starttext
--
-- \registerctxluafile{libs-imp-foreign}{autosuffix}
--
-- \startluacode
--
-- local foreign = optional.loaded.foreign
--
-- local kplib = (os.platform == "win64" and "kpathsea*w64")
-- or (os.platform == "win32" and "kpathsea*w32")
-- or "libkpathsea"
--
-- local kpse = foreign.load(kplib)
--
-- local set_program_name = kpse.kpse_set_program_name
-- local find_file = kpse.kpse_find_file
--
-- set_program_name:types { "string", "string" }
-- find_file :types { ret = "string", "string", "int", "int" }
--
-- set_program_name("pdftex","pdftex")
--
-- local function lookup(filename,filetype,n)
-- local c = os.clock()
-- for i=1,n do
-- if find_file(filename,filetype,0) then
-- -- okay
-- end
-- end
-- c = os.clock() - c
--
-- local NC, BC, NR = context.NC, context.BC, context.NR
--
-- context.starttabulate()
-- BC() context("asked") NC() context.type(filename) NC() NR()
-- BC() context("found") NC() context.type(find_file(filename,filetype,0)) NC() NR()
-- if n > 0 then
-- BC() context("times") NC() context(n) NC() NR()
-- BC() context("seconds") NC() context(" %0.3f",c) NC() NR()
-- BC() context("lookup") NC() context(" %0.6f",c/n) NC() NR()
-- end
-- context.stoptabulate()
-- end
--
-- lookup("oeps.tex", 26,10000)
-- lookup("metafun.mp", 16, 5000)
-- lookup("logo10.afm", 4, 2500)
--
-- \stopluacode
--
-- \stoptext
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