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luaotfload-fontloader.lua
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luaotfload-fontloader.lua
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-- merged file : luatex-fonts-merged.lua
-- parent file : luatex-fonts.lua
-- merge date : 03/25/14 02:17:04
do -- begin closure to overcome local limits and interference
if not modules then modules={} end modules ['l-lua']={
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"
}
local major,minor=string.match(_VERSION,"^[^%d]+(%d+)%.(%d+).*$")
_MAJORVERSION=tonumber(major) or 5
_MINORVERSION=tonumber(minor) or 1
_LUAVERSION=_MAJORVERSION+_MINORVERSION/10
if not lpeg then
lpeg=require("lpeg")
end
if loadstring then
local loadnormal=load
function load(first,...)
if type(first)=="string" then
return loadstring(first,...)
else
return loadnormal(first,...)
end
end
else
loadstring=load
end
if not ipairs then
local function iterate(a,i)
i=i+1
local v=a[i]
if v~=nil then
return i,v
end
end
function ipairs(a)
return iterate,a,0
end
end
if not pairs then
function pairs(t)
return next,t
end
end
if not table.unpack then
table.unpack=_G.unpack
elseif not unpack then
_G.unpack=table.unpack
end
if not package.loaders then
package.loaders=package.searchers
end
local print,select,tostring=print,select,tostring
local inspectors={}
function setinspector(inspector)
inspectors[#inspectors+1]=inspector
end
function inspect(...)
for s=1,select("#",...) do
local value=select(s,...)
local done=false
for i=1,#inspectors do
done=inspectors[i](value)
if done then
break
end
end
if not done then
print(tostring(value))
end
end
end
local dummy=function() end
function optionalrequire(...)
local ok,result=xpcall(require,dummy,...)
if ok then
return result
end
end
if lua then
lua.mask=load([[τεχ = 1]]) and "utf" or "ascii"
end
end -- closure
do -- begin closure to overcome local limits and interference
if not modules then modules={} end modules ['l-lpeg']={
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"
}
lpeg=require("lpeg")
if not lpeg.print then function lpeg.print(...) print(lpeg.pcode(...)) end end
local type,next,tostring=type,next,tostring
local byte,char,gmatch,format=string.byte,string.char,string.gmatch,string.format
local floor=math.floor
local P,R,S,V,Ct,C,Cs,Cc,Cp,Cmt=lpeg.P,lpeg.R,lpeg.S,lpeg.V,lpeg.Ct,lpeg.C,lpeg.Cs,lpeg.Cc,lpeg.Cp,lpeg.Cmt
local lpegtype,lpegmatch,lpegprint=lpeg.type,lpeg.match,lpeg.print
if setinspector then
setinspector(function(v) if lpegtype(v) then lpegprint(v) return true end end)
end
lpeg.patterns=lpeg.patterns or {}
local patterns=lpeg.patterns
local anything=P(1)
local endofstring=P(-1)
local alwaysmatched=P(true)
patterns.anything=anything
patterns.endofstring=endofstring
patterns.beginofstring=alwaysmatched
patterns.alwaysmatched=alwaysmatched
local sign=S('+-')
local zero=P('0')
local digit=R('09')
local octdigit=R("07")
local lowercase=R("az")
local uppercase=R("AZ")
local underscore=P("_")
local hexdigit=digit+lowercase+uppercase
local cr,lf,crlf=P("\r"),P("\n"),P("\r\n")
local newline=crlf+S("\r\n")
local escaped=P("\\")*anything
local squote=P("'")
local dquote=P('"')
local space=P(" ")
local period=P(".")
local comma=P(",")
local utfbom_32_be=P('\000\000\254\255')
local utfbom_32_le=P('\255\254\000\000')
local utfbom_16_be=P('\254\255')
local utfbom_16_le=P('\255\254')
local utfbom_8=P('\239\187\191')
local utfbom=utfbom_32_be+utfbom_32_le+utfbom_16_be+utfbom_16_le+utfbom_8
local utftype=utfbom_32_be*Cc("utf-32-be")+utfbom_32_le*Cc("utf-32-le")+utfbom_16_be*Cc("utf-16-be")+utfbom_16_le*Cc("utf-16-le")+utfbom_8*Cc("utf-8")+alwaysmatched*Cc("utf-8")
local utfstricttype=utfbom_32_be*Cc("utf-32-be")+utfbom_32_le*Cc("utf-32-le")+utfbom_16_be*Cc("utf-16-be")+utfbom_16_le*Cc("utf-16-le")+utfbom_8*Cc("utf-8")
local utfoffset=utfbom_32_be*Cc(4)+utfbom_32_le*Cc(4)+utfbom_16_be*Cc(2)+utfbom_16_le*Cc(2)+utfbom_8*Cc(3)+Cc(0)
local utf8next=R("\128\191")
patterns.utfbom_32_be=utfbom_32_be
patterns.utfbom_32_le=utfbom_32_le
patterns.utfbom_16_be=utfbom_16_be
patterns.utfbom_16_le=utfbom_16_le
patterns.utfbom_8=utfbom_8
patterns.utf_16_be_nl=P("\000\r\000\n")+P("\000\r")+P("\000\n")
patterns.utf_16_le_nl=P("\r\000\n\000")+P("\r\000")+P("\n\000")
patterns.utf8one=R("\000\127")
patterns.utf8two=R("\194\223")*utf8next
patterns.utf8three=R("\224\239")*utf8next*utf8next
patterns.utf8four=R("\240\244")*utf8next*utf8next*utf8next
patterns.utfbom=utfbom
patterns.utftype=utftype
patterns.utfstricttype=utfstricttype
patterns.utfoffset=utfoffset
local utf8char=patterns.utf8one+patterns.utf8two+patterns.utf8three+patterns.utf8four
local validutf8char=utf8char^0*endofstring*Cc(true)+Cc(false)
local utf8character=P(1)*R("\128\191")^0
patterns.utf8=utf8char
patterns.utf8char=utf8char
patterns.utf8character=utf8character
patterns.validutf8=validutf8char
patterns.validutf8char=validutf8char
local eol=S("\n\r")
local spacer=S(" \t\f\v")
local whitespace=eol+spacer
local nonspacer=1-spacer
local nonwhitespace=1-whitespace
patterns.eol=eol
patterns.spacer=spacer
patterns.whitespace=whitespace
patterns.nonspacer=nonspacer
patterns.nonwhitespace=nonwhitespace
local stripper=spacer^0*C((spacer^0*nonspacer^1)^0)
local fullstripper=whitespace^0*C((whitespace^0*nonwhitespace^1)^0)
local collapser=Cs(spacer^0/""*nonspacer^0*((spacer^0/" "*nonspacer^1)^0))
patterns.stripper=stripper
patterns.fullstripper=fullstripper
patterns.collapser=collapser
patterns.lowercase=lowercase
patterns.uppercase=uppercase
patterns.letter=patterns.lowercase+patterns.uppercase
patterns.space=space
patterns.tab=P("\t")
patterns.spaceortab=patterns.space+patterns.tab
patterns.newline=newline
patterns.emptyline=newline^1
patterns.equal=P("=")
patterns.comma=comma
patterns.commaspacer=comma*spacer^0
patterns.period=period
patterns.colon=P(":")
patterns.semicolon=P(";")
patterns.underscore=underscore
patterns.escaped=escaped
patterns.squote=squote
patterns.dquote=dquote
patterns.nosquote=(escaped+(1-squote))^0
patterns.nodquote=(escaped+(1-dquote))^0
patterns.unsingle=(squote/"")*patterns.nosquote*(squote/"")
patterns.undouble=(dquote/"")*patterns.nodquote*(dquote/"")
patterns.unquoted=patterns.undouble+patterns.unsingle
patterns.unspacer=((patterns.spacer^1)/"")^0
patterns.singlequoted=squote*patterns.nosquote*squote
patterns.doublequoted=dquote*patterns.nodquote*dquote
patterns.quoted=patterns.doublequoted+patterns.singlequoted
patterns.digit=digit
patterns.octdigit=octdigit
patterns.hexdigit=hexdigit
patterns.sign=sign
patterns.cardinal=digit^1
patterns.integer=sign^-1*digit^1
patterns.unsigned=digit^0*period*digit^1
patterns.float=sign^-1*patterns.unsigned
patterns.cunsigned=digit^0*comma*digit^1
patterns.cfloat=sign^-1*patterns.cunsigned
patterns.number=patterns.float+patterns.integer
patterns.cnumber=patterns.cfloat+patterns.integer
patterns.oct=zero*octdigit^1
patterns.octal=patterns.oct
patterns.HEX=zero*P("X")*(digit+uppercase)^1
patterns.hex=zero*P("x")*(digit+lowercase)^1
patterns.hexadecimal=zero*S("xX")*hexdigit^1
patterns.hexafloat=sign^-1*zero*S("xX")*(hexdigit^0*period*hexdigit^1+hexdigit^1*period*hexdigit^0+hexdigit^1)*(S("pP")*sign^-1*hexdigit^1)^-1
patterns.decafloat=sign^-1*(digit^0*period*digit^1+digit^1*period*digit^0+digit^1)*S("eE")*sign^-1*digit^1
patterns.propername=(uppercase+lowercase+underscore)*(uppercase+lowercase+underscore+digit)^0*endofstring
patterns.somecontent=(anything-newline-space)^1
patterns.beginline=#(1-newline)
patterns.longtostring=Cs(whitespace^0/""*((patterns.quoted+nonwhitespace^1+whitespace^1/""*(P(-1)+Cc(" ")))^0))
local function anywhere(pattern)
return P { P(pattern)+1*V(1) }
end
lpeg.anywhere=anywhere
function lpeg.instringchecker(p)
p=anywhere(p)
return function(str)
return lpegmatch(p,str) and true or false
end
end
function lpeg.splitter(pattern,action)
return (((1-P(pattern))^1)/action+1)^0
end
function lpeg.tsplitter(pattern,action)
return Ct((((1-P(pattern))^1)/action+1)^0)
end
local splitters_s,splitters_m,splitters_t={},{},{}
local function splitat(separator,single)
local splitter=(single and splitters_s[separator]) or splitters_m[separator]
if not splitter then
separator=P(separator)
local other=C((1-separator)^0)
if single then
local any=anything
splitter=other*(separator*C(any^0)+"")
splitters_s[separator]=splitter
else
splitter=other*(separator*other)^0
splitters_m[separator]=splitter
end
end
return splitter
end
local function tsplitat(separator)
local splitter=splitters_t[separator]
if not splitter then
splitter=Ct(splitat(separator))
splitters_t[separator]=splitter
end
return splitter
end
lpeg.splitat=splitat
lpeg.tsplitat=tsplitat
function string.splitup(str,separator)
if not separator then
separator=","
end
return lpegmatch(splitters_m[separator] or splitat(separator),str)
end
local cache={}
function lpeg.split(separator,str)
local c=cache[separator]
if not c then
c=tsplitat(separator)
cache[separator]=c
end
return lpegmatch(c,str)
end
function string.split(str,separator)
if separator then
local c=cache[separator]
if not c then
c=tsplitat(separator)
cache[separator]=c
end
return lpegmatch(c,str)
else
return { str }
end
end
local spacing=patterns.spacer^0*newline
local empty=spacing*Cc("")
local nonempty=Cs((1-spacing)^1)*spacing^-1
local content=(empty+nonempty)^1
patterns.textline=content
local linesplitter=tsplitat(newline)
patterns.linesplitter=linesplitter
function string.splitlines(str)
return lpegmatch(linesplitter,str)
end
local cache={}
function lpeg.checkedsplit(separator,str)
local c=cache[separator]
if not c then
separator=P(separator)
local other=C((1-separator)^1)
c=Ct(separator^0*other*(separator^1*other)^0)
cache[separator]=c
end
return lpegmatch(c,str)
end
function string.checkedsplit(str,separator)
local c=cache[separator]
if not c then
separator=P(separator)
local other=C((1-separator)^1)
c=Ct(separator^0*other*(separator^1*other)^0)
cache[separator]=c
end
return lpegmatch(c,str)
end
local function f2(s) local c1,c2=byte(s,1,2) return c1*64+c2-12416 end
local function f3(s) local c1,c2,c3=byte(s,1,3) return (c1*64+c2)*64+c3-925824 end
local function f4(s) local c1,c2,c3,c4=byte(s,1,4) return ((c1*64+c2)*64+c3)*64+c4-63447168 end
local utf8byte=patterns.utf8one/byte+patterns.utf8two/f2+patterns.utf8three/f3+patterns.utf8four/f4
patterns.utf8byte=utf8byte
local cache={}
function lpeg.stripper(str)
if type(str)=="string" then
local s=cache[str]
if not s then
s=Cs(((S(str)^1)/""+1)^0)
cache[str]=s
end
return s
else
return Cs(((str^1)/""+1)^0)
end
end
local cache={}
function lpeg.keeper(str)
if type(str)=="string" then
local s=cache[str]
if not s then
s=Cs((((1-S(str))^1)/""+1)^0)
cache[str]=s
end
return s
else
return Cs((((1-str)^1)/""+1)^0)
end
end
function lpeg.frontstripper(str)
return (P(str)+P(true))*Cs(anything^0)
end
function lpeg.endstripper(str)
return Cs((1-P(str)*endofstring)^0)
end
function lpeg.replacer(one,two,makefunction,isutf)
local pattern
local u=isutf and utf8char or 1
if type(one)=="table" then
local no=#one
local p=P(false)
if no==0 then
for k,v in next,one do
p=p+P(k)/v
end
pattern=Cs((p+u)^0)
elseif no==1 then
local o=one[1]
one,two=P(o[1]),o[2]
pattern=Cs((one/two+u)^0)
else
for i=1,no do
local o=one[i]
p=p+P(o[1])/o[2]
end
pattern=Cs((p+u)^0)
end
else
pattern=Cs((P(one)/(two or "")+u)^0)
end
if makefunction then
return function(str)
return lpegmatch(pattern,str)
end
else
return pattern
end
end
function lpeg.finder(lst,makefunction,isutf)
local pattern
if type(lst)=="table" then
pattern=P(false)
if #lst==0 then
for k,v in next,lst do
pattern=pattern+P(k)
end
else
for i=1,#lst do
pattern=pattern+P(lst[i])
end
end
else
pattern=P(lst)
end
if isutf then
pattern=((utf8char or 1)-pattern)^0*pattern
else
pattern=(1-pattern)^0*pattern
end
if makefunction then
return function(str)
return lpegmatch(pattern,str)
end
else
return pattern
end
end
local splitters_f,splitters_s={},{}
function lpeg.firstofsplit(separator)
local splitter=splitters_f[separator]
if not splitter then
local pattern=P(separator)
splitter=C((1-pattern)^0)
splitters_f[separator]=splitter
end
return splitter
end
function lpeg.secondofsplit(separator)
local splitter=splitters_s[separator]
if not splitter then
local pattern=P(separator)
splitter=(1-pattern)^0*pattern*C(anything^0)
splitters_s[separator]=splitter
end
return splitter
end
local splitters_s,splitters_p={},{}
function lpeg.beforesuffix(separator)
local splitter=splitters_s[separator]
if not splitter then
local pattern=P(separator)
splitter=C((1-pattern)^0)*pattern*endofstring
splitters_s[separator]=splitter
end
return splitter
end
function lpeg.afterprefix(separator)
local splitter=splitters_p[separator]
if not splitter then
local pattern=P(separator)
splitter=pattern*C(anything^0)
splitters_p[separator]=splitter
end
return splitter
end
function lpeg.balancer(left,right)
left,right=P(left),P(right)
return P { left*((1-left-right)+V(1))^0*right }
end
local nany=utf8char/""
function lpeg.counter(pattern)
pattern=Cs((P(pattern)/" "+nany)^0)
return function(str)
return #lpegmatch(pattern,str)
end
end
utf=utf or (unicode and unicode.utf8) or {}
local utfcharacters=utf and utf.characters or string.utfcharacters
local utfgmatch=utf and utf.gmatch
local utfchar=utf and utf.char
lpeg.UP=lpeg.P
if utfcharacters then
function lpeg.US(str)
local p=P(false)
for uc in utfcharacters(str) do
p=p+P(uc)
end
return p
end
elseif utfgmatch then
function lpeg.US(str)
local p=P(false)
for uc in utfgmatch(str,".") do
p=p+P(uc)
end
return p
end
else
function lpeg.US(str)
local p=P(false)
local f=function(uc)
p=p+P(uc)
end
lpegmatch((utf8char/f)^0,str)
return p
end
end
local range=utf8byte*utf8byte+Cc(false)
function lpeg.UR(str,more)
local first,last
if type(str)=="number" then
first=str
last=more or first
else
first,last=lpegmatch(range,str)
if not last then
return P(str)
end
end
if first==last then
return P(str)
elseif utfchar and (last-first<8) then
local p=P(false)
for i=first,last do
p=p+P(utfchar(i))
end
return p
else
local f=function(b)
return b>=first and b<=last
end
return utf8byte/f
end
end
function lpeg.is_lpeg(p)
return p and lpegtype(p)=="pattern"
end
function lpeg.oneof(list,...)
if type(list)~="table" then
list={ list,... }
end
local p=P(list[1])
for l=2,#list do
p=p+P(list[l])
end
return p
end
local sort=table.sort
local function copyindexed(old)
local new={}
for i=1,#old do
new[i]=old
end
return new
end
local function sortedkeys(tab)
local keys,s={},0
for key,_ in next,tab do
s=s+1
keys[s]=key
end
sort(keys)
return keys
end
function lpeg.append(list,pp,delayed,checked)
local p=pp
if #list>0 then
local keys=copyindexed(list)
sort(keys)
for i=#keys,1,-1 do
local k=keys[i]
if p then
p=P(k)+p
else
p=P(k)
end
end
elseif delayed then
local keys=sortedkeys(list)
if p then
for i=1,#keys,1 do
local k=keys[i]
local v=list[k]
p=P(k)/list+p
end
else
for i=1,#keys do
local k=keys[i]
local v=list[k]
if p then
p=P(k)+p
else
p=P(k)
end
end
if p then
p=p/list
end
end
elseif checked then
local keys=sortedkeys(list)
for i=1,#keys do
local k=keys[i]
local v=list[k]
if p then
if k==v then
p=P(k)+p
else
p=P(k)/v+p
end
else
if k==v then
p=P(k)
else
p=P(k)/v
end
end
end
else
local keys=sortedkeys(list)
for i=1,#keys do
local k=keys[i]
local v=list[k]
if p then
p=P(k)/v+p
else
p=P(k)/v
end
end
end
return p
end
local function make(t)
local p
local keys=sortedkeys(t)
for i=1,#keys do
local k=keys[i]
local v=t[k]
if not p then
if next(v) then
p=P(k)*make(v)
else
p=P(k)
end
else
if next(v) then
p=p+P(k)*make(v)
else
p=p+P(k)
end
end
end
return p
end
function lpeg.utfchartabletopattern(list)
local tree={}
for i=1,#list do
local t=tree
for c in gmatch(list[i],".") do
if not t[c] then
t[c]={}
end
t=t[c]
end
end
return make(tree)
end
patterns.containseol=lpeg.finder(eol)
local function nextstep(n,step,result)
local m=n%step
local d=floor(n/step)
if d>0 then
local v=V(tostring(step))
local s=result.start
for i=1,d do
if s then
s=v*s
else
s=v
end
end
result.start=s
end
if step>1 and result.start then
local v=V(tostring(step/2))
result[tostring(step)]=v*v
end
if step>0 then
return nextstep(m,step/2,result)
else
return result
end
end
function lpeg.times(pattern,n)
return P(nextstep(n,2^16,{ "start",["1"]=pattern }))
end
local trailingzeros=zero^0*-digit
local case_1=period*trailingzeros/""
local case_2=period*(digit-trailingzeros)^1*(trailingzeros/"")
local number=digit^1*(case_1+case_2)
local stripper=Cs((number+1)^0)
lpeg.patterns.stripzeros=stripper
end -- closure
do -- begin closure to overcome local limits and interference
if not modules then modules={} end modules ['l-functions']={
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"
}
functions=functions or {}
function functions.dummy() end
end -- closure
do -- begin closure to overcome local limits and interference
if not modules then modules={} end modules ['l-string']={
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"
}
local string=string
local sub,gmatch,format,char,byte,rep,lower=string.sub,string.gmatch,string.format,string.char,string.byte,string.rep,string.lower
local lpegmatch,patterns=lpeg.match,lpeg.patterns
local P,S,C,Ct,Cc,Cs=lpeg.P,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cc,lpeg.Cs
local unquoted=patterns.squote*C(patterns.nosquote)*patterns.squote+patterns.dquote*C(patterns.nodquote)*patterns.dquote
function string.unquoted(str)
return lpegmatch(unquoted,str) or str
end
function string.quoted(str)
return format("%q",str)
end
function string.count(str,pattern)
local n=0
for _ in gmatch(str,pattern) do
n=n+1
end
return n
end
function string.limit(str,n,sentinel)
if #str>n then
sentinel=sentinel or "..."
return sub(str,1,(n-#sentinel))..sentinel
else
return str
end
end
local stripper=patterns.stripper
local fullstripper=patterns.fullstripper
local collapser=patterns.collapser
local longtostring=patterns.longtostring
function string.strip(str)
return lpegmatch(stripper,str) or ""
end
function string.fullstrip(str)
return lpegmatch(fullstripper,str) or ""
end
function string.collapsespaces(str)
return lpegmatch(collapser,str) or ""
end
function string.longtostring(str)
return lpegmatch(longtostring,str) or ""
end
local pattern=P(" ")^0*P(-1)
function string.is_empty(str)
if str=="" then
return true
else
return lpegmatch(pattern,str) and true or false
end
end
local anything=patterns.anything
local allescapes=Cc("%")*S(".-+%?()[]*")
local someescapes=Cc("%")*S(".-+%()[]")
local matchescapes=Cc(".")*S("*?")
local pattern_a=Cs ((allescapes+anything )^0 )
local pattern_b=Cs ((someescapes+matchescapes+anything )^0 )
local pattern_c=Cs (Cc("^")*(someescapes+matchescapes+anything )^0*Cc("$") )
function string.escapedpattern(str,simple)
return lpegmatch(simple and pattern_b or pattern_a,str)
end
function string.topattern(str,lowercase,strict)
if str=="" or type(str)~="string" then
return ".*"
elseif strict then
str=lpegmatch(pattern_c,str)
else
str=lpegmatch(pattern_b,str)
end
if lowercase then
return lower(str)
else
return str
end
end
function string.valid(str,default)
return (type(str)=="string" and str~="" and str) or default or nil
end
string.itself=function(s) return s end
local pattern=Ct(C(1)^0)
function string.totable(str)
return lpegmatch(pattern,str)
end
local replacer=lpeg.replacer("@","%%")
function string.tformat(fmt,...)
return format(lpegmatch(replacer,fmt),...)
end
string.quote=string.quoted
string.unquote=string.unquoted
end -- closure
do -- begin closure to overcome local limits and interference
if not modules then modules={} end modules ['l-table']={
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"
}
local type,next,tostring,tonumber,ipairs,select=type,next,tostring,tonumber,ipairs,select
local table,string=table,string
local concat,sort,insert,remove=table.concat,table.sort,table.insert,table.remove
local format,lower,dump=string.format,string.lower,string.dump
local getmetatable,setmetatable=getmetatable,setmetatable
local getinfo=debug.getinfo
local lpegmatch,patterns=lpeg.match,lpeg.patterns
local floor=math.floor
local stripper=patterns.stripper
function table.strip(tab)
local lst,l={},0
for i=1,#tab do
local s=lpegmatch(stripper,tab[i]) or ""
if s=="" then
else
l=l+1
lst[l]=s
end
end
return lst
end
function table.keys(t)
if t then
local keys,k={},0
for key,_ in next,t do
k=k+1
keys[k]=key
end
return keys
else
return {}
end
end
local function compare(a,b)
local ta,tb=type(a),type(b)
if ta==tb then
return a<b
else
return tostring(a)<tostring(b)
end
end
local function sortedkeys(tab)
if tab then
local srt,category,s={},0,0
for key,_ in next,tab do
s=s+1
srt[s]=key
if category==3 then
else
local tkey=type(key)
if tkey=="string" then
category=(category==2 and 3) or 1
elseif tkey=="number" then
category=(category==1 and 3) or 2
else
category=3
end
end
end
if category==0 or category==3 then
sort(srt,compare)
else
sort(srt)
end
return srt
else
return {}
end
end
local function sortedhashonly(tab)
if tab then
local srt,s={},0
for key,_ in next,tab do
if type(key)=="string" then
s=s+1
srt[s]=key
end
end
sort(srt)
return srt
else
return {}
end
end
local function sortedindexonly(tab)
if tab then
local srt,s={},0
for key,_ in next,tab do
if type(key)=="number" then
s=s+1
srt[s]=key
end
end
sort(srt)
return srt
else
return {}
end
end
local function sortedhashkeys(tab,cmp)
if tab then
local srt,s={},0
for key,_ in next,tab do
if key then
s=s+1
srt[s]=key
end
end
sort(srt,cmp)
return srt
else
return {}
end
end
function table.allkeys(t)
local keys={}
for k,v in next,t do
for k,v in next,v do
keys[k]=true
end
end
return sortedkeys(keys)
end
table.sortedkeys=sortedkeys
table.sortedhashonly=sortedhashonly
table.sortedindexonly=sortedindexonly
table.sortedhashkeys=sortedhashkeys
local function nothing() end
local function sortedhash(t,cmp)
if t then
local s
if cmp then
s=sortedhashkeys(t,function(a,b) return cmp(t,a,b) end)
else
s=sortedkeys(t)
end
local n=0
local m=#s
local function kv(s)
if n<m then
n=n+1
local k=s[n]
return k,t[k]
end
end
return kv,s
else
return nothing
end
end
table.sortedhash=sortedhash
table.sortedpairs=sortedhash
function table.append(t,list)
local n=#t
for i=1,#list do
n=n+1
t[n]=list[i]
end
return t
end
function table.prepend(t,list)
local nl=#list
local nt=nl+#t
for i=#t,1,-1 do
t[nt]=t[i]
nt=nt-1