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|
--
-- This is file `oberdiek.pdftexcmds.lua',
-- generated with the docstrip utility.
--
-- The original source files were:
--
-- pdftexcmds.dtx (with options: `lua')
--
-- This is a generated file.
--
-- Copyright (C) 2007 by Heiko Oberdiek <oberdiek@uni-freiburg.de>
--
-- This work may be distributed and/or modified under the
-- conditions of the LaTeX Project Public License, either
-- version 1.3 of this license or (at your option) any later
-- version. The latest version of this license is in
-- http://www.latex-project.org/lppl.txt
-- and version 1.3 or later is part of all distributions of
-- LaTeX version 2005/12/01 or later.
--
-- This work has the LPPL maintenance status "maintained".
--
-- This Current Maintainer of this work is Heiko Oberdiek.
--
-- This work consists of the main source file pdftexcmds.dtx
-- and the derived files
-- pdftexcmds.sty, pdftexcmds.pdf, pdftexcmds.ins, pdftexcmds.drv,
-- pdftexcmds-test1.tex, pdftexcmds-test2.tex,
-- oberdiek.pdftexcmds.lua, pdftexcmds.lua.
--
module("oberdiek.pdftexcmds", package.seeall)
local systemexitstatus
function strcmp(A, B)
if A == B then
tex.write("0")
elseif A < B then
tex.write("-1")
else
tex.write("1")
end
end
local function utf8_to_byte(str)
local i = 0
local n = string.len(str)
local t = {}
while i < n do
i = i + 1
local a = string.byte(str, i)
if a < 128 then
table.insert(t, string.char(a))
else
if a >= 192 and i < n then
i = i + 1
local b = string.byte(str, i)
if b < 128 or b >= 192 then
i = i - 1
elseif a == 194 then
table.insert(t, string.char(b))
elseif a == 195 then
table.insert(t, string.char(b + 64))
end
end
end
end
return table.concat(t)
end
function escapehex(str, mode)
if mode == "byte" then
str = utf8_to_byte(str)
end
tex.write((string.gsub(str, ".",
function (ch)
return string.format("%02X", string.byte(ch))
end
)))
end
function unescapehex(str, mode)
local a = 0
local first = true
local result = {}
for i = 1, string.len(str), 1 do
local ch = string.byte(str, i)
if ch >= 48 and ch <= 57 then
ch = ch - 48
elseif ch >= 65 and ch <= 70 then
ch = ch - 55
elseif ch >= 97 and ch <= 102 then
ch = ch - 87
else
ch = nil
end
if ch then
if first then
a = ch * 16
first = false
else
table.insert(result, a + ch)
first = true
end
end
end
if not first then
table.insert(result, a)
end
if mode == "byte" then
local utf8 = {}
for i, a in ipairs(result) do
if a < 128 then
table.insert(utf8, a)
else
if a < 192 then
table.insert(utf8, 194)
a = a - 128
else
table.insert(utf8, 195)
a = a - 192
end
table.insert(utf8, a + 128)
end
end
result = utf8
end
tex.settoks(toks, string.char(unpack(result)))
end
function escapestring(str, mode)
if mode == "byte" then
str = utf8_to_byte(str)
end
tex.write((string.gsub(str, ".",
function (ch)
local b = string.byte(ch)
if b < 33 or b > 126 then
return string.format("\\%.3o", b)
end
if b == 40 or b == 41 or b == 92 then
return "\\" .. ch
end
return nil
end
)))
end
function escapename(str, mode)
if mode == "byte" then
str = utf8_to_byte(str)
end
tex.write((string.gsub(str, ".",
function (ch)
local b = string.byte(ch)
if b == 0 then
return ""
end
if b <= 32 or b >= 127
or b == 35 or b == 37 or b == 40 or b == 41
or b == 47 or b == 60 or b == 62 or b == 91
or b == 93 or b == 123 or b == 125 then
return string.format("#%.2X", b)
else
return nil
end
end
)))
end
function filesize(filename)
local foundfile = kpse.find_file(filename, "tex", true)
if foundfile then
local size = lfs.attributes(foundfile, "size")
if size then
tex.write(size)
end
end
end
function filemoddate(filename)
local foundfile = kpse.find_file(filename, "tex", true)
if foundfile then
local date = lfs.attributes(foundfile, "modification")
if date then
local d = os.date("*t", date)
if d.sec >= 60 then
d.sec = 59
end
local u = os.date("!*t", date)
local off = 60 * (d.hour - u.hour) + d.min - u.min
if d.year ~= u.year then
if d.year > u.year then
off = off + 1440
else
off = off - 1440
end
elseif d.yday ~= u.yday then
if d.yday > u.yday then
off = off + 1440
else
off = off - 1440
end
end
local timezone
if off == 0 then
timezone = "Z"
else
local hours = math.floor(off / 60)
local mins = math.abs(off - hours * 60)
timezone = string.format("%+03d'%02d'", hours, mins)
end
tex.write(string.format("D:%04d%02d%02d%02d%02d%02d%s",
d.year, d.month, d.day, d.hour, d.min, d.sec, timezone))
end
end
end
function filedump(offset, length, filename)
length = tonumber(length)
if length and length > 0 then
local foundfile = kpse.find_file(filename, "tex", true)
if foundfile then
offset = tonumber(offset)
if not offset then
offset = 0
end
local filehandle = io.open(foundfile, "r")
if filehandle then
if offset > 0 then
filehandle:seek("set", offset)
end
local dump = filehandle:read(length)
escapehex(dump)
end
end
end
end
function mdfivesum(str, mode)
if mode == "byte" then
str = utf8_to_byte(str)
end
escapehex(md5.sum(str))
end
function filemdfivesum(filename)
local foundfile = kpse.find_file(filename, "tex", true)
if foundfile then
local filehandle = io.open(foundfile, "r")
if filehandle then
local contents = filehandle:read("*a")
escapehex(md5.sum(contents))
end
end
end
function shellescape()
if os.execute then
tex.write("1")
else
tex.write("0")
end
end
function system(cmdline)
systemexitstatus = nil
texio.write_nl("log", "system(" .. cmdline .. ") ")
if os.execute then
texio.write("log", "executed.")
systemexitstatus = os.execute(cmdline)
else
texio.write("log", "disabled.")
end
end
function lastsystemstatus()
local result = tonumber(systemexitstatus)
if result then
local x = math.floor(result / 256)
tex.write(result - 256 * math.floor(result / 256))
end
end
function lastsystemexit()
local result = tonumber(systemexitstatus)
if result then
tex.write(math.floor(result / 256))
end
end
function pipe(cmdline)
local result
systemexitstatus = nil
texio.write_nl("log", "pipe(" .. cmdline ..") ")
if io.popen then
texio.write("log", "executed.")
local handle = io.popen(cmdline, "r")
if handle then
result = handle:read("*a")
handle:close()
end
else
texio.write("log", "disabled.")
end
if result then
tex.settoks(toks, result)
else
tex.settoks(toks, "")
end
end
--
-- End of File `oberdiek.pdftexcmds.lua'.
|
