/usr/share/texlive/texmf-dist/tex/luatex/lualibs/lualibs-aux.lua is in texlive-luatex 2012.20120611-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 | if not modules then modules = { } end modules ['l-aux'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- for inline, no store split : for s in string.gmatch(str,",* *([^,]+)") do .. end
aux = aux or { }
local concat, format, gmatch = table.concat, string.format, string.gmatch
local tostring, type = tostring, type
local lpegmatch = lpeg.match
local P, R, V = lpeg.P, lpeg.R, lpeg.V
local escape, left, right = P("\\"), P('{'), P('}')
lpeg.patterns.balanced = P {
[1] = ((escape * (left+right)) + (1 - (left+right)) + V(2))^0,
[2] = left * V(1) * right
}
local space = lpeg.P(' ')
local equal = lpeg.P("=")
local comma = lpeg.P(",")
local lbrace = lpeg.P("{")
local rbrace = lpeg.P("}")
local nobrace = 1 - (lbrace+rbrace)
local nested = lpeg.P { lbrace * (nobrace + lpeg.V(1))^0 * rbrace }
local spaces = space^0
local value = lpeg.P(lbrace * lpeg.C((nobrace + nested)^0) * rbrace) + lpeg.C((nested + (1-comma))^0)
local key = lpeg.C((1-equal-comma)^1)
local pattern_a = (space+comma)^0 * (key * equal * value + key * lpeg.C(""))
local pattern_c = (space+comma)^0 * (key * equal * value)
local key = lpeg.C((1-space-equal-comma)^1)
local pattern_b = spaces * comma^0 * spaces * (key * ((spaces * equal * spaces * value) + lpeg.C("")))
-- "a=1, b=2, c=3, d={a{b,c}d}, e=12345, f=xx{a{b,c}d}xx, g={}" : outer {} removes, leading spaces ignored
local hash = { }
local function set(key,value) -- using Carg is slower here
hash[key] = value
end
local pattern_a_s = (pattern_a/set)^1
local pattern_b_s = (pattern_b/set)^1
local pattern_c_s = (pattern_c/set)^1
aux.settings_to_hash_pattern_a = pattern_a_s
aux.settings_to_hash_pattern_b = pattern_b_s
aux.settings_to_hash_pattern_c = pattern_c_s
function aux.make_settings_to_hash_pattern(set,how)
if how == "strict" then
return (pattern_c/set)^1
elseif how == "tolerant" then
return (pattern_b/set)^1
else
return (pattern_a/set)^1
end
end
function aux.settings_to_hash(str,existing)
if str and str ~= "" then
hash = existing or { }
if moretolerant then
lpegmatch(pattern_b_s,str)
else
lpegmatch(pattern_a_s,str)
end
return hash
else
return { }
end
end
function aux.settings_to_hash_tolerant(str,existing)
if str and str ~= "" then
hash = existing or { }
lpegmatch(pattern_b_s,str)
return hash
else
return { }
end
end
function aux.settings_to_hash_strict(str,existing)
if str and str ~= "" then
hash = existing or { }
lpegmatch(pattern_c_s,str)
return next(hash) and hash
else
return nil
end
end
local separator = comma * space^0
local value = lpeg.P(lbrace * lpeg.C((nobrace + nested)^0) * rbrace) + lpeg.C((nested + (1-comma))^0)
local pattern = lpeg.Ct(value*(separator*value)^0)
-- "aap, {noot}, mies" : outer {} removes, leading spaces ignored
aux.settings_to_array_pattern = pattern
-- we could use a weak table as cache
function aux.settings_to_array(str)
if not str or str == "" then
return { }
else
return lpegmatch(pattern,str)
end
end
local function set(t,v)
t[#t+1] = v
end
local value = lpeg.P(lpeg.Carg(1)*value) / set
local pattern = value*(separator*value)^0 * lpeg.Carg(1)
function aux.add_settings_to_array(t,str)
return lpegmatch(pattern,str,nil,t)
end
function aux.hash_to_string(h,separator,yes,no,strict,omit)
if h then
local t, s = { }, table.sortedkeys(h)
omit = omit and table.tohash(omit)
for i=1,#s do
local key = s[i]
if not omit or not omit[key] then
local value = h[key]
if type(value) == "boolean" then
if yes and no then
if value then
t[#t+1] = key .. '=' .. yes
elseif not strict then
t[#t+1] = key .. '=' .. no
end
elseif value or not strict then
t[#t+1] = key .. '=' .. tostring(value)
end
else
t[#t+1] = key .. '=' .. value
end
end
end
return concat(t,separator or ",")
else
return ""
end
end
function aux.array_to_string(a,separator)
if a then
return concat(a,separator or ",")
else
return ""
end
end
function aux.settings_to_set(str,t)
t = t or { }
for s in gmatch(str,"%s*([^,]+)") do
t[s] = true
end
return t
end
local value = lbrace * lpeg.C((nobrace + nested)^0) * rbrace
local pattern = lpeg.Ct((space + value)^0)
function aux.arguments_to_table(str)
return lpegmatch(pattern,str)
end
-- temporary here
function aux.getparameters(self,class,parentclass,settings)
local sc = self[class]
if not sc then
sc = table.clone(self[parent])
self[class] = sc
end
aux.settings_to_hash(settings,sc)
end
-- temporary here
local digit = lpeg.R("09")
local period = lpeg.P(".")
local zero = lpeg.P("0")
local trailingzeros = zero^0 * -digit -- suggested by Roberto R
local case_1 = period * trailingzeros / ""
local case_2 = period * (digit - trailingzeros)^1 * (trailingzeros / "")
local number = digit^1 * (case_1 + case_2)
local stripper = lpeg.Cs((number + 1)^0)
--~ local sample = "bla 11.00 bla 11 bla 0.1100 bla 1.00100 bla 0.00 bla 0.001 bla 1.1100 bla 0.100100100 bla 0.00100100100"
--~ collectgarbage("collect")
--~ str = string.rep(sample,10000)
--~ local ts = os.clock()
--~ lpegmatch(stripper,str)
--~ print(#str, os.clock()-ts, lpegmatch(stripper,sample))
lpeg.patterns.strip_zeros = stripper
function aux.strip_zeros(str)
return lpegmatch(stripper,str)
end
function aux.definetable(target) -- defines undefined tables
local composed, t = nil, { }
for name in gmatch(target,"([^%.]+)") do
if composed then
composed = composed .. "." .. name
else
composed = name
end
t[#t+1] = format("%s = %s or { }",composed,composed)
end
return concat(t,"\n")
end
function aux.accesstable(target)
local t = _G
for name in gmatch(target,"([^%.]+)") do
t = t[name]
end
return t
end
-- as we use this a lot ...
--~ function aux.cachefunction(action,weak)
--~ local cache = { }
--~ if weak then
--~ setmetatable(cache, { __mode = "kv" } )
--~ end
--~ local function reminder(str)
--~ local found = cache[str]
--~ if not found then
--~ found = action(str)
--~ cache[str] = found
--~ end
--~ return found
--~ end
--~ return reminder, cache
--~ end
|