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local readfile = require'luametalatex-readfile'
local purenumber = lpeg.R'09'^1
local optoperator = lpeg.C(lpeg.S'+-='^-1)*lpeg.C(lpeg.P(1)^0)
local commentchar = lpeg.S' %*;#'+-1
local wordpatt = (lpeg.C('"') * lpeg.C((1-lpeg.P'"')^0) * lpeg.P'"'^-1 + lpeg.C(('<' * lpeg.S'<['^-1)^-1) * lpeg.S' \t'^0 * lpeg.C((1-lpeg.S' \t')^0)) * lpeg.S' \t'^0 * lpeg.Cp()
local fontmap = {}
local function mapline(line, operator)
if not operator then
operator, line = optoperator:match(line)
end
if commentchar:match(line) then return end
local pos = 1
local tfmname, psname, flags, special, enc, font, subset
local kind, word
while pos ~= #line+1 do
kind, word, pos = wordpatt:match(line, pos)
if kind == "" then
if not tfmname then tfmname = word
elseif not psname and not purenumber:match(word) then
psname = word
elseif purenumber:match(word) then flags = tonumber(word)
else
error[[Invalid map file line, excessive simple words]]
end
elseif kind == '"' then
special = word
else
if kind == "<[" or (kind ~= "<<" and word:sub(-4) == ".enc") then
enc = word
else
font = word
subset = kind ~= "<<"
end
end
end
fontmap[tfmname] = {psname or tfmname, flags or (font and 4 or 0x22), font, enc, special, subset}
end
local function mapfile(filename, operator)
if not operator then
operator, filename = optoperator:match(filename)
end
local file <close> = readfile('map', filename)
for line in file:lines() do mapline(line, operator) end
end
local function reset()
for k in next, fontmap do
fontmap[k] = nil
end
end
return {
reset = reset,
mapline = mapline,
mapfile = mapfile,
fontmap = fontmap
}