diff options
| -rw-r--r-- | lualibs-lpeg.lua | 837 | ||||
| -rw-r--r-- | lualibs-url.lua | 335 |
2 files changed, 1040 insertions, 132 deletions
diff --git a/lualibs-lpeg.lua b/lualibs-lpeg.lua index b107a8e..d92b722 100644 --- a/lualibs-lpeg.lua +++ b/lualibs-lpeg.lua @@ -6,30 +6,124 @@ if not modules then modules = { } end modules ['l-lpeg'] = { license = "see context related readme files" } + +-- a new lpeg fails on a #(1-P(":")) test and really needs a + P(-1) + local lpeg = require("lpeg") +-- tracing (only used when we encounter a problem in integration of lpeg in luatex) + +-- some code will move to unicode and string + +local report = texio and texio.write_nl or print + +-- local lpmatch = lpeg.match +-- local lpprint = lpeg.print +-- local lpp = lpeg.P +-- local lpr = lpeg.R +-- local lps = lpeg.S +-- local lpc = lpeg.C +-- local lpb = lpeg.B +-- local lpv = lpeg.V +-- local lpcf = lpeg.Cf +-- local lpcb = lpeg.Cb +-- local lpcg = lpeg.Cg +-- local lpct = lpeg.Ct +-- local lpcs = lpeg.Cs +-- local lpcc = lpeg.Cc +-- local lpcmt = lpeg.Cmt +-- local lpcarg = lpeg.Carg + +-- function lpeg.match(l,...) report("LPEG MATCH") lpprint(l) return lpmatch(l,...) end + +-- function lpeg.P (l) local p = lpp (l) report("LPEG P =") lpprint(l) return p end +-- function lpeg.R (l) local p = lpr (l) report("LPEG R =") lpprint(l) return p end +-- function lpeg.S (l) local p = lps (l) report("LPEG S =") lpprint(l) return p end +-- function lpeg.C (l) local p = lpc (l) report("LPEG C =") lpprint(l) return p end +-- function lpeg.B (l) local p = lpb (l) report("LPEG B =") lpprint(l) return p end +-- function lpeg.V (l) local p = lpv (l) report("LPEG V =") lpprint(l) return p end +-- function lpeg.Cf (l) local p = lpcf (l) report("LPEG Cf =") lpprint(l) return p end +-- function lpeg.Cb (l) local p = lpcb (l) report("LPEG Cb =") lpprint(l) return p end +-- function lpeg.Cg (l) local p = lpcg (l) report("LPEG Cg =") lpprint(l) return p end +-- function lpeg.Ct (l) local p = lpct (l) report("LPEG Ct =") lpprint(l) return p end +-- function lpeg.Cs (l) local p = lpcs (l) report("LPEG Cs =") lpprint(l) return p end +-- function lpeg.Cc (l) local p = lpcc (l) report("LPEG Cc =") lpprint(l) return p end +-- function lpeg.Cmt (l) local p = lpcmt (l) report("LPEG Cmt =") lpprint(l) return p end +-- function lpeg.Carg (l) local p = lpcarg(l) report("LPEG Carg =") lpprint(l) return p end + +local type, next = type, next +local byte, char, gmatch, format = string.byte, string.char, string.gmatch, string.format + +-- Beware, we predefine a bunch of patterns here and one reason for doing so +-- is that we get consistent behaviour in some of the visualizers. + lpeg.patterns = lpeg.patterns or { } -- so that we can share local patterns = lpeg.patterns -local P, R, S, Ct, C, Cs, Cc, V = lpeg.P, lpeg.R, lpeg.S, lpeg.Ct, lpeg.C, lpeg.Cs, lpeg.Cc, lpeg.V -local match = lpeg.match +local P, R, S, V, Ct, C, Cs, Cc, Cp = lpeg.P, lpeg.R, lpeg.S, lpeg.V, lpeg.Ct, lpeg.C, lpeg.Cs, lpeg.Cc, lpeg.Cp +local lpegtype, lpegmatch = lpeg.type, lpeg.match + +local utfcharacters = string.utfcharacters +local utfgmatch = unicode and unicode.utf8.gmatch + +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 digit, sign = R('09'), S('+-') local cr, lf, crlf = P("\r"), P("\n"), P("\r\n") -local utf8byte = R("\128\191") +local newline = crlf + S("\r\n") -- cr + lf +local escaped = P("\\") * anything +local squote = P("'") +local dquote = P('"') +local space = P(" ") + +local utfbom_32_be = P('\000\000\254\255') +local utfbom_32_le = P('\255\254\000\000') +local utfbom_16_be = P('\255\254') +local utfbom_16_le = P('\254\255') +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 / "utf-32-be" + utfbom_32_le / "utf-32-le" + + utfbom_16_be / "utf-16-be" + utfbom_16_le / "utf-16-le" + + utfbom_8 / "utf-8" + alwaysmatched / "unknown" + +local utf8next = R("\128\191") -patterns.utf8byte = utf8byte patterns.utf8one = R("\000\127") -patterns.utf8two = R("\194\223") * utf8byte -patterns.utf8three = R("\224\239") * utf8byte * utf8byte -patterns.utf8four = R("\240\244") * utf8byte * utf8byte * utf8byte +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 + +local utf8char = patterns.utf8one + patterns.utf8two + patterns.utf8three + patterns.utf8four +local validutf8char = utf8char^0 * endofstring * Cc(true) + Cc(false) + +patterns.utf8 = utf8char +patterns.utf8char = utf8char +patterns.validutf8 = validutf8char +patterns.validutf8char = validutf8char + +local eol = S("\n\r") +local spacer = S(" \t\f\v") -- + char(0xc2, 0xa0) if we want utf (cf mail roberto) +local whitespace = eol + spacer patterns.digit = digit patterns.sign = sign patterns.cardinal = sign^0 * digit^1 patterns.integer = sign^0 * digit^1 patterns.float = sign^0 * digit^0 * P('.') * digit^1 +patterns.cfloat = sign^0 * digit^0 * P(',') * digit^1 patterns.number = patterns.float + patterns.integer +patterns.cnumber = patterns.cfloat + patterns.integer patterns.oct = P("0") * R("07")^1 patterns.octal = patterns.oct patterns.HEX = P("0x") * R("09","AF")^1 @@ -38,55 +132,83 @@ patterns.hexadecimal = P("0x") * R("09","AF","af")^1 patterns.lowercase = R("az") patterns.uppercase = R("AZ") patterns.letter = patterns.lowercase + patterns.uppercase -patterns.space = S(" ") -patterns.eol = S("\n\r") -patterns.spacer = S(" \t\f\v") -- + string.char(0xc2, 0xa0) if we want utf (cf mail roberto) -patterns.newline = crlf + cr + lf -patterns.nonspace = 1 - patterns.space -patterns.nonspacer = 1 - patterns.spacer -patterns.whitespace = patterns.eol + patterns.spacer -patterns.nonwhitespace = 1 - patterns.whitespace -patterns.utf8 = patterns.utf8one + patterns.utf8two + patterns.utf8three + patterns.utf8four -patterns.utfbom = P('\000\000\254\255') + P('\255\254\000\000') + P('\255\254') + P('\254\255') + P('\239\187\191') +patterns.space = space +patterns.tab = P("\t") +patterns.spaceortab = patterns.space + patterns.tab +patterns.eol = eol +patterns.spacer = spacer +patterns.whitespace = whitespace +patterns.newline = newline +patterns.emptyline = newline^1 +patterns.nonspacer = 1 - spacer +patterns.nonwhitespace = 1 - whitespace +patterns.equal = P("=") +patterns.comma = P(",") +patterns.commaspacer = P(",") * spacer^0 +patterns.period = P(".") +patterns.colon = P(":") +patterns.semicolon = P(";") +patterns.underscore = P("_") +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 -- more often undouble +patterns.unspacer = ((patterns.spacer^1)/"")^0 -function lpeg.anywhere(pattern) --slightly adapted from website - return P { P(pattern) + 1 * V(1) } -- why so complex? -end +patterns.singlequoted = squote * patterns.nosquote * squote +patterns.doublequoted = dquote * patterns.nodquote * dquote +patterns.quoted = patterns.doublequoted + patterns.singlequoted -function lpeg.splitter(pattern, action) - return (((1-P(pattern))^1)/action+1)^0 +patterns.somecontent = (anything - newline - space)^1 -- (utf8char - newline - space)^1 +patterns.beginline = #(1-newline) + +-- print(string.unquoted("test")) +-- print(string.unquoted([["t\"est"]])) +-- print(string.unquoted([["t\"est"x]])) +-- print(string.unquoted("\'test\'")) +-- print(string.unquoted('"test"')) +-- print(string.unquoted('"test"')) + +local function anywhere(pattern) --slightly adapted from website + return P { P(pattern) + 1 * V(1) } end -local spacing = patterns.spacer^0 * patterns.newline -- sort of strip -local empty = spacing * Cc("") -local nonempty = Cs((1-spacing)^1) * spacing^-1 -local content = (empty + nonempty)^1 +lpeg.anywhere = anywhere -local capture = Ct(content^0) +function lpeg.instringchecker(p) + p = anywhere(p) + return function(str) + return lpegmatch(p,str) and true or false + end +end -function string:splitlines() - return match(capture,self) +function lpeg.splitter(pattern, action) + return (((1-P(pattern))^1)/action+1)^0 end -patterns.textline = content +function lpeg.tsplitter(pattern, action) + return Ct((((1-P(pattern))^1)/action+1)^0) +end ---~ local p = lpeg.splitat("->",false) print(match(p,"oeps->what->more")) -- oeps what more ---~ local p = lpeg.splitat("->",true) print(match(p,"oeps->what->more")) -- oeps what->more ---~ local p = lpeg.splitat("->",false) print(match(p,"oeps")) -- oeps ---~ local p = lpeg.splitat("->",true) print(match(p,"oeps")) -- oeps +-- probleem: separator can be lpeg and that does not hash too well, but +-- it's quite okay as the key is then not garbage collected -local splitters_s, splitters_m = { }, { } +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 other, any = C((1 - separator)^0), P(1) + local any = anything splitter = other * (separator * C(any^0) + "") -- ? splitters_s[separator] = splitter else - local other = C((1 - separator)^0) splitter = other * (separator * other)^0 splitters_m[separator] = splitter end @@ -94,29 +216,135 @@ local function splitat(separator,single) return splitter end -lpeg.splitat = splitat +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 p = splitat("->",false) print(lpegmatch(p,"oeps->what->more")) -- oeps what more +--~ local p = splitat("->",true) print(lpegmatch(p,"oeps->what->more")) -- oeps what->more +--~ local p = splitat("->",false) print(lpegmatch(p,"oeps")) -- oeps +--~ local p = splitat("->",true) print(lpegmatch(p,"oeps")) -- oeps local cache = { } function lpeg.split(separator,str) local c = cache[separator] if not c then - c = Ct(splitat(separator)) + c = tsplitat(separator) cache[separator] = c end - return match(c,str) + return lpegmatch(c,str) end -function string:split(separator) - local c = cache[separator] - if not c then - c = Ct(splitat(separator)) - cache[separator] = c +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 - return match(c,self) end -lpeg.splitters = cache +local spacing = patterns.spacer^0 * newline -- sort of strip +local empty = spacing * Cc("") +local nonempty = Cs((1-spacing)^1) * spacing^-1 +local content = (empty + nonempty)^1 + +patterns.textline = content + +--~ local linesplitter = Ct(content^0) +--~ +--~ function string.splitlines(str) +--~ return lpegmatch(linesplitter,str) +--~ end + +local linesplitter = tsplitat(newline) + +patterns.linesplitter = linesplitter + +function string.splitlines(str) + return lpegmatch(linesplitter,str) +end + +local utflinesplitter = utfbom^-1 * tsplitat(newline) + +patterns.utflinesplitter = utflinesplitter + +function string.utfsplitlines(str) + return lpegmatch(utflinesplitter,str or "") +end + +local utfcharsplitter_ows = utfbom^-1 * Ct(C(utf8char)^0) +local utfcharsplitter_iws = utfbom^-1 * Ct((whitespace^1 + C(utf8char))^0) + +function string.utfsplit(str,ignorewhitespace) -- new + if ignorewhitespace then + return lpegmatch(utfcharsplitter_iws,str or "") + else + return lpegmatch(utfcharsplitter_ows,str or "") + end +end + +-- inspect(string.utfsplit("a b c d")) +-- inspect(string.utfsplit("a b c d",true)) + +-- -- alternative 1: 0.77 +-- +-- local utfcharcounter = utfbom^-1 * Cs((utf8char/'!')^0) +-- +-- function string.utflength(str) +-- return #lpegmatch(utfcharcounter,str or "") +-- end +-- +-- -- alternative 2: 1.70 +-- +-- local n = 0 +-- +-- local utfcharcounter = utfbom^-1 * (utf8char/function() n = n + 1 end)^0 -- slow +-- +-- function string.utflength(str) +-- n = 0 +-- lpegmatch(utfcharcounter,str or "") +-- return n +-- end +-- +-- -- alternative 3: 0.24 (native unicode.utf8.len: 0.047) + +local n = 0 + +local utfcharcounter = utfbom^-1 * Cs ( ( + Cp() * (lpeg.patterns.utf8one )^1 * Cp() / function(f,t) n = n + t - f end + + Cp() * (lpeg.patterns.utf8two )^1 * Cp() / function(f,t) n = n + (t - f)/2 end + + Cp() * (lpeg.patterns.utf8three)^1 * Cp() / function(f,t) n = n + (t - f)/3 end + + Cp() * (lpeg.patterns.utf8four )^1 * Cp() / function(f,t) n = n + (t - f)/4 end +)^0 ) + +function string.utflength(str) + n = 0 + lpegmatch(utfcharcounter,str or "") + return n +end + +--~ lpeg.splitters = cache -- no longer public local cache = { } @@ -124,42 +352,515 @@ function lpeg.checkedsplit(separator,str) local c = cache[separator] if not c then separator = P(separator) - local other = C((1 - separator)^0) + local other = C((1 - separator)^1) c = Ct(separator^0 * other * (separator^1 * other)^0) cache[separator] = c end - return match(c,str) + return lpegmatch(c,str) end -function string:checkedsplit(separator) +function string.checkedsplit(str,separator) local c = cache[separator] if not c then separator = P(separator) - local other = C((1 - separator)^0) + local other = C((1 - separator)^1) c = Ct(separator^0 * other * (separator^1 * other)^0) cache[separator] = c end - return match(c,self) + return lpegmatch(c,str) +end + +--~ from roberto's site: + +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 str = " a b c d " + +--~ local s = lpeg.stripper(lpeg.R("az")) print("["..lpegmatch(s,str).."]") +--~ local s = lpeg.keeper(lpeg.R("az")) print("["..lpegmatch(s,str).."]") +--~ local s = lpeg.stripper("ab") print("["..lpegmatch(s,str).."]") +--~ local s = lpeg.keeper("ab") print("["..lpegmatch(s,str).."]") + +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) -- or pattern (yet undocumented) + return (P(str) + P(true)) * Cs(anything^0) +end + +function lpeg.endstripper(str) -- or pattern (yet undocumented) + return Cs((1 - P(str) * endofstring)^0) +end + +-- Just for fun I looked at the used bytecode and +-- p = (p and p + pp) or pp gets one more (testset). + +function lpeg.replacer(one,two) + if type(one) == "table" then + local no = #one + local p + if no == 0 then + for k, v in next, one do + local pp = P(k) / v + if p then + p = p + pp + else + p = pp + end + end + return Cs((p + 1)^0) + elseif no == 1 then + local o = one[1] + one, two = P(o[1]), o[2] + return Cs(((1-one)^1 + one/two)^0) + else + for i=1,no do + local o = one[i] + local pp = P(o[1]) / o[2] + if p then + p = p + pp + else + p = pp + end + end + return Cs((p + 1)^0) + end + else + one = P(one) + two = two or "" + return Cs(((1-one)^1 + one/two)^0) + end end ---~ function lpeg.append(list,pp) ---~ local p = pp ---~ for l=1,#list do ---~ if p then ---~ p = p + P(list[l]) ---~ else ---~ p = P(list[l]) ---~ end ---~ end ---~ return p +-- print(lpeg.match(lpeg.replacer("e","a"),"test test")) +-- print(lpeg.match(lpeg.replacer{{"e","a"}},"test test")) +-- print(lpeg.match(lpeg.replacer({ e = "a", t = "x" }),"test test")) + +local splitters_f, splitters_s = { }, { } + +function lpeg.firstofsplit(separator) -- always return value + local splitter = splitters_f[separator] + if not splitter then + separator = P(separator) + splitter = C((1 - separator)^0) + splitters_f[separator] = splitter + end + return splitter +end + +function lpeg.secondofsplit(separator) -- nil if not split + local splitter = splitters_s[separator] + if not splitter then + separator = P(separator) + splitter = (1 - separator)^0 * separator * C(anything^0) + splitters_s[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 + +--~ print(1,lpegmatch(lpeg.firstofsplit(":"),"bc:de")) +--~ print(2,lpegmatch(lpeg.firstofsplit(":"),":de")) -- empty +--~ print(3,lpegmatch(lpeg.firstofsplit(":"),"bc")) +--~ print(4,lpegmatch(lpeg.secondofsplit(":"),"bc:de")) +--~ print(5,lpegmatch(lpeg.secondofsplit(":"),"bc:")) -- empty +--~ print(6,lpegmatch(lpeg.secondofsplit(":",""),"bc")) +--~ print(7,lpegmatch(lpeg.secondofsplit(":"),"bc")) +--~ print(9,lpegmatch(lpeg.secondofsplit(":","123"),"bc")) + +--~ -- slower: +--~ +--~ function lpeg.counter(pattern) +--~ local n, pattern = 0, (lpeg.P(pattern)/function() n = n + 1 end + lpeg.anything)^0 +--~ return function(str) n = 0 ; lpegmatch(pattern,str) ; return n end --~ end ---~ from roberto's site: +local nany = utf8char/"" + +function lpeg.counter(pattern) + pattern = Cs((P(pattern)/" " + nany)^0) + return function(str) + return #lpegmatch(pattern,str) + end +end + +if utfgmatch then + + function lpeg.count(str,what) -- replaces string.count + if type(what) == "string" then + local n = 0 + for _ in utfgmatch(str,what) do + n = n + 1 + end + return n + else -- 4 times slower but still faster than / function + return #lpegmatch(Cs((P(what)/" " + nany)^0),str) + end + end + +else + + local cache = { } + + function lpeg.count(str,what) -- replaces string.count + if type(what) == "string" then + local p = cache[what] + if not p then + p = Cs((P(what)/" " + nany)^0) + cache[p] = p + end + return #lpegmatch(p,str) + else -- 4 times slower but still faster than / function + return #lpegmatch(Cs((P(what)/" " + nany)^0),str) + end + end + +end + +local patterns_escapes = { -- also defines in l-string + ["%"] = "%%", + ["."] = "%.", + ["+"] = "%+", ["-"] = "%-", ["*"] = "%*", + ["["] = "%[", ["]"] = "%]", + ["("] = "%)", [")"] = "%)", + -- ["{"] = "%{", ["}"] = "%}" + -- ["^"] = "%^", ["$"] = "%$", +} + +local simple_escapes = { -- also defines in l-string + ["-"] = "%-", + ["."] = "%.", + ["?"] = ".", + ["*"] = ".*", +} + +local p = Cs((S("-.+*%()[]") / patterns_escapes + anything)^0) +local s = Cs((S("-.+*%()[]") / simple_escapes + anything)^0) + +function string.escapedpattern(str,simple) + return lpegmatch(simple and s or p,str) +end + +-- utf extensies + +lpeg.UP = lpeg.P + +if utfcharacters then + + function lpeg.US(str) + local p + for uc in utfcharacters(str) do + if p then + p = p + P(uc) + else + p = P(uc) + end + end + return p + end + + +elseif utfgmatch then + + function lpeg.US(str) + local p + for uc in utfgmatch(str,".") do + if p then + p = p + P(uc) + else + p = P(uc) + end + end + return p + end + +else -local f1 = string.byte + function lpeg.US(str) + local p + local f = function(uc) + if p then + p = p + P(uc) + else + p = P(uc) + end + end + lpegmatch((utf8char/f)^0,str) + return p + end + +end + +local range = Cs(utf8byte) * (Cs(utf8byte) + Cc(false)) + +local utfchar = unicode and unicode.utf8 and unicode.utf8.char + +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 -- a somewhat arbitrary criterium + local p + for i=first,last do + if p then + p = p + P(utfchar(i)) + else + p = P(utfchar(i)) + end + end + return p -- nil when invalid range + else + local f = function(b) + return b >= first and b <= last + end + return utf8byte / f -- nil when invalid range + end +end -local function f2(s) local c1, c2 = f1(s,1,2) return c1 * 64 + c2 - 12416 end -local function f3(s) local c1, c2, c3 = f1(s,1,3) return (c1 * 64 + c2) * 64 + c3 - 925824 end -local function f4(s) local c1, c2, c3, c4 = f1(s,1,4) return ((c1 * 64 + c2) * 64 + c3) * 64 + c4 - 63447168 end +--~ lpeg.print(lpeg.R("ab","cd","gh")) +--~ lpeg.print(lpeg.P("a","b","c")) +--~ lpeg.print(lpeg.S("a","b","c")) -patterns.utf8byte = patterns.utf8one/f1 + patterns.utf8two/f2 + patterns.utf8three/f3 + patterns.utf8four/f4 +--~ print(lpeg.count("äáàa",lpeg.P("á") + lpeg.P("à"))) +--~ print(lpeg.count("äáàa",lpeg.UP("áà"))) +--~ print(lpeg.count("äáàa",lpeg.US("àá"))) +--~ print(lpeg.count("äáàa",lpeg.UR("aá"))) +--~ print(lpeg.count("äáàa",lpeg.UR("àá"))) +--~ print(lpeg.count("äáàa",lpeg.UR(0x0000,0xFFFF))) + +function lpeg.is_lpeg(p) + return p and lpegtype(p) == "pattern" +end + +function lpeg.oneof(list,...) -- lpeg.oneof("elseif","else","if","then") -- assume proper order + if type(list) ~= "table" then + list = { list, ... } + end + -- table.sort(list) -- longest match first + local p = P(list[1]) + for l=2,#list do + p = p + P(list[l]) + end + return p +end + +-- For the moment here, but it might move to utilities. Beware, we need to +-- have the longest keyword first, so 'aaa' comes beforte 'aa' which is why we +-- loop back from the end cq. prepend. + +local sort, fastcopy, sortedkeys = table.sort, table.fastcopy, table.sortedkeys -- dependency! + +function lpeg.append(list,pp,delayed,checked) + local p = pp + if #list > 0 then + local keys = fastcopy(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 -- hm, it looks like the lpeg parser resolves anyway + 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 + -- problem: substitution gives a capture + 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 + +-- inspect(lpeg.append({ a = "1", aa = "1", aaa = "1" } ,nil,true)) +-- inspect(lpeg.append({ ["degree celsius"] = "1", celsius = "1", degree = "1" } ,nil,true)) + +-- function lpeg.exact_match(words,case_insensitive) +-- local pattern = concat(words) +-- if case_insensitive then +-- local pattern = S(upper(characters)) + S(lower(characters)) +-- local list = { } +-- for i=1,#words do +-- list[lower(words[i])] = true +-- end +-- return Cmt(pattern^1, function(_,i,s) +-- return list[lower(s)] and i +-- end) +-- else +-- local pattern = S(concat(words)) +-- local list = { } +-- for i=1,#words do +-- list[words[i]] = true +-- end +-- return Cmt(pattern^1, function(_,i,s) +-- return list[s] and i +-- end) +-- end +-- end + +-- experiment: + +local function make(t) + local p +-- for k, v in next, t do + for k, v in table.sortedhash(t) do + 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 + +-- inspect ( lpeg.utfchartabletopattern { +-- utfchar(0x00A0), -- nbsp +-- utfchar(0x2000), -- enquad +-- utfchar(0x2001), -- emquad +-- utfchar(0x2002), -- enspace +-- utfchar(0x2003), -- emspace +-- utfchar(0x2004), -- threeperemspace +-- utfchar(0x2005), -- fourperemspace +-- utfchar(0x2006), -- sixperemspace +-- utfchar(0x2007), -- figurespace +-- utfchar(0x2008), -- punctuationspace +-- utfchar(0x2009), -- breakablethinspace +-- utfchar(0x200A), -- hairspace +-- utfchar(0x200B), -- zerowidthspace +-- utfchar(0x202F), -- narrownobreakspace +-- utfchar(0x205F), -- math thinspace +-- } ) + +-- handy from within tex: + +local lpegmatch = lpeg.match + +local replacer = lpeg.replacer("@","%%") -- Watch the escaped % in lpeg! + +function string.tformat(fmt,...) + return format(lpegmatch(replacer,fmt),...) +end + +-- strips leading and trailing spaces and collapsed all other spaces + +local pattern = Cs(whitespace^0/"" * ((whitespace^1 * P(-1) / "") + (whitespace^1/" ") + P(1))^0) + +function string.collapsespaces(str) + return lpegmatch(pattern,str) +end diff --git a/lualibs-url.lua b/lualibs-url.lua index e3e6f81..83b8fcc 100644 --- a/lualibs-url.lua +++ b/lualibs-url.lua @@ -6,101 +6,291 @@ if not modules then modules = { } end modules ['l-url'] = { license = "see context related readme files" } -local char, gmatch, gsub = string.char, string.gmatch, string.gsub +local char, gmatch, gsub, format, byte, find = string.char, string.gmatch, string.gsub, string.format, string.byte, string.find +local concat = table.concat local tonumber, type = tonumber, type -local lpegmatch = lpeg.match +local P, C, R, S, Cs, Cc, Ct, Cf, Cg, V = lpeg.P, lpeg.C, lpeg.R, lpeg.S, lpeg.Cs, lpeg.Cc, lpeg.Ct, lpeg.Cf, lpeg.Cg, lpeg.V +local lpegmatch, lpegpatterns, replacer = lpeg.match, lpeg.patterns, lpeg.replacer --- from the spec (on the web): +-- from wikipedia: -- --- foo://example.com:8042/over/there?name=ferret#nose --- \_/ \______________/\_________/ \_________/ \__/ --- | | | | | --- scheme authority path query fragment --- | _____________________|__ --- / \ / \ --- urn:example:animal:ferret:nose - -url = url or { } - -local function tochar(s) - return char(tonumber(s,16)) -end +-- foo://username:password@example.com:8042/over/there/index.dtb?type=animal;name=narwhal#nose +-- \_/ \_______________/ \_________/ \__/ \___/ \_/ \______________________/ \__/ +-- | | | | | | | | +-- | userinfo hostname port | | query fragment +-- | \________________________________/\_____________|____|/ +-- scheme | | | | +-- | authority path | | +-- | | | +-- | path interpretable as filename +-- | ___________|____________ | +-- / \ / \ | +-- urn:example:animal:ferret:nose interpretable as extension + +url = url or { } +local url = url -local colon, qmark, hash, slash, percent, endofstring = lpeg.P(":"), lpeg.P("?"), lpeg.P("#"), lpeg.P("/"), lpeg.P("%"), lpeg.P(-1) +local tochar = function(s) return char(tonumber(s,16)) end -local hexdigit = lpeg.R("09","AF","af") -local plus = lpeg.P("+") -local escaped = (plus / " ") + (percent * lpeg.C(hexdigit * hexdigit) / tochar) +local colon = P(":") +local qmark = P("?") +local hash = P("#") +local slash = P("/") +local percent = P("%") +local endofstring = P(-1) + +local hexdigit = R("09","AF","af") +local plus = P("+") +local nothing = Cc("") +local escapedchar = (percent * C(hexdigit * hexdigit)) / tochar +local escaped = (plus / " ") + escapedchar -- we assume schemes with more than 1 character (in order to avoid problems with windows disks) +-- we also assume that when we have a scheme, we also have an authority +-- +-- maybe we should already split the query (better for unescaping as = & can be part of a value + +local schemestr = Cs((escaped+(1-colon-slash-qmark-hash))^2) +local authoritystr = Cs((escaped+(1- slash-qmark-hash))^0) +local pathstr = Cs((escaped+(1- qmark-hash))^0) +----- querystr = Cs((escaped+(1- hash))^0) +local querystr = Cs(( (1- hash))^0) +local fragmentstr = Cs((escaped+(1- endofstring))^0) + +local scheme = schemestr * colon + nothing +local authority = slash * slash * authoritystr + nothing +local path = slash * pathstr + nothing +local query = qmark * querystr + nothing +local fragment = hash * fragmentstr + nothing + +local validurl = scheme * authority * path * query * fragment +local parser = Ct(validurl) + +lpegpatterns.url = validurl +lpegpatterns.urlsplitter = parser -local scheme = lpeg.Cs((escaped+(1-colon-slash-qmark-hash))^2) * colon + lpeg.Cc("") -local authority = slash * slash * lpeg.Cs((escaped+(1- slash-qmark-hash))^0) + lpeg.Cc("") -local path = slash * lpeg.Cs((escaped+(1- qmark-hash))^0) + lpeg.Cc("") -local query = qmark * lpeg.Cs((escaped+(1- hash))^0) + lpeg.Cc("") -local fragment = hash * lpeg.Cs((escaped+(1- endofstring))^0) + lpeg.Cc("") +local escapes = { } -local parser = lpeg.Ct(scheme * authority * path * query * fragment) +setmetatable(escapes, { __index = function(t,k) + local v = format("%%%02X",byte(k)) + t[k] = v + return v +end }) + +local escaper = Cs((R("09","AZ","az")^1 + P(" ")/"%%20" + S("-./_")^1 + P(1) / escapes)^0) -- space happens most +local unescaper = Cs((escapedchar + 1)^0) + +lpegpatterns.urlunescaped = escapedchar +lpegpatterns.urlescaper = escaper +lpegpatterns.urlunescaper = unescaper -- todo: reconsider Ct as we can as well have five return values (saves a table) -- so we can have two parsers, one with and one without -function url.split(str) +local function split(str) return (type(str) == "string" and lpegmatch(parser,str)) or str end --- todo: cache them +local isscheme = schemestr * colon * slash * slash -- this test also assumes authority -function url.hashed(str) - local s = url.split(str) - local somescheme = s[1] ~= "" - return { - scheme = (somescheme and s[1]) or "file", - authority = s[2], - path = s[3], - query = s[4], - fragment = s[5], - original = str, - noscheme = not somescheme, - } +local function hasscheme(str) + if str then + local scheme = lpegmatch(isscheme,str) -- at least one character + return scheme ~= "" and scheme or false + else + return false + end end -function url.hasscheme(str) - return url.split(str)[1] ~= "" +--~ print(hasscheme("home:")) +--~ print(hasscheme("home://")) + +-- todo: cache them + +local rootletter = R("az","AZ") + + S("_-+") +local separator = P("://") +local qualified = P(".")^0 * P("/") + + rootletter * P(":") + + rootletter^1 * separator + + rootletter^1 * P("/") +local rootbased = P("/") + + rootletter * P(":") + +local barswapper = replacer("|",":") +local backslashswapper = replacer("\\","/") + +-- queries: + +local equal = P("=") +local amp = P("&") +local key = Cs(((escapedchar+1)-equal )^0) +local value = Cs(((escapedchar+1)-amp -endofstring)^0) + +local splitquery = Cf ( Ct("") * P { "sequence", + sequence = V("pair") * (amp * V("pair"))^0, + pair = Cg(key * equal * value), +}, rawset) + +-- hasher + +local function hashed(str) -- not yet ok (/test?test) + if str == "" then + return { + scheme = "invalid", + original = str, + } + end + local s = split(str) + local rawscheme = s[1] + local rawquery = s[4] + local somescheme = rawscheme ~= "" + local somequery = rawquery ~= "" + if not somescheme and not somequery then + s = { + scheme = "file", + authority = "", + path = str, + query = "", + fragment = "", + original = str, + noscheme = true, + filename = str, + } + else -- not always a filename but handy anyway + local authority, path, filename = s[2], s[3] + if authority == "" then + filename = path + elseif path == "" then + filename = "" + else + filename = authority .. "/" .. path + end + s = { + scheme = rawscheme, + authority = authority, + path = path, + query = lpegmatch(unescaper,rawquery), -- unescaped, but possible conflict with & and = + queries = lpegmatch(splitquery,rawquery), -- split first and then unescaped + fragment = s[5], + original = str, + noscheme = false, + filename = filename, + } + end + return s end -function url.addscheme(str,scheme) - return (url.hasscheme(str) and str) or ((scheme or "file:///") .. str) +-- inspect(hashed("template://test")) + +-- Here we assume: +-- +-- files: /// = relative +-- files: //// = absolute (!) + +--~ table.print(hashed("file://c:/opt/tex/texmf-local")) -- c:/opt/tex/texmf-local +--~ table.print(hashed("file://opt/tex/texmf-local" )) -- opt/tex/texmf-local +--~ table.print(hashed("file:///opt/tex/texmf-local" )) -- opt/tex/texmf-local +--~ table.print(hashed("file:////opt/tex/texmf-local" )) -- /opt/tex/texmf-local +--~ table.print(hashed("file:///./opt/tex/texmf-local" )) -- ./opt/tex/texmf-local + +--~ table.print(hashed("c:/opt/tex/texmf-local" )) -- c:/opt/tex/texmf-local +--~ table.print(hashed("opt/tex/texmf-local" )) -- opt/tex/texmf-local +--~ table.print(hashed("/opt/tex/texmf-local" )) -- /opt/tex/texmf-local + +url.split = split +url.hasscheme = hasscheme +url.hashed = hashed + +function url.addscheme(str,scheme) -- no authority + if hasscheme(str) then + return str + elseif not scheme then + return "file:///" .. str + else + return scheme .. ":///" .. str + end end -function url.construct(hash) - local fullurl = hash.sheme .. "://".. hash.authority .. hash.path - if hash.query then - fullurl = fullurl .. "?".. hash.query +function url.construct(hash) -- dodo: we need to escape ! + local fullurl, f = { }, 0 + local scheme, authority, path, query, fragment = hash.scheme, hash.authority, hash.path, hash.query, hash.fragment + if scheme and scheme ~= "" then + f = f + 1 ; fullurl[f] = scheme .. "://" end - if hash.fragment then - fullurl = fullurl .. "?".. hash.fragment + if authority and authority ~= "" then + f = f + 1 ; fullurl[f] = authority end - return fullurl + if path and path ~= "" then + f = f + 1 ; fullurl[f] = "/" .. path + end + if query and query ~= "" then + f = f + 1 ; fullurl[f] = "?".. query + end + if fragment and fragment ~= "" then + f = f + 1 ; fullurl[f] = "#".. fragment + end + return lpegmatch(escaper,concat(fullurl)) end -function url.filename(filename) - local t = url.hashed(filename) +function url.filename(filename) -- why no lpeg here ? + local t = hashed(filename) return (t.scheme == "file" and (gsub(t.path,"^/([a-zA-Z])([:|])/)","%1:"))) or filename end +local function escapestring(str) + return lpegmatch(escaper,str) +end + +url.escape = escapestring + +-- function url.query(str) -- separator could be an option +-- if type(str) == "string" then +-- local t = { } +-- for k, v in gmatch(str,"([^&=]*)=([^&=]*)") do +-- t[k] = v +-- end +-- return t +-- else +-- return str +-- end +-- end + function url.query(str) if type(str) == "string" then - local t = { } - for k, v in gmatch(str,"([^&=]*)=([^&=]*)") do - t[k] = v - end - return t + return lpegmatch(splitquery,str) or "" else return str end end +function url.toquery(data) + local td = type(data) + if td == "string" then + return #str and escape(data) or nil -- beware of double escaping + elseif td == "table" then + if next(data) then + local t = { } + for k, v in next, data do + t[#t+1] = format("%s=%s",k,escapestring(v)) + end + return concat(t,"&") + end + else + -- nil is a signal that no query + end +end + +-- /test/ | /test | test/ | test => test + +function url.barepath(path) + if not path or path == "" then + return "" + else + return (gsub(path,"^/?(.-)/?$","%1")) + end +end + --~ print(url.filename("file:///c:/oeps.txt")) --~ print(url.filename("c:/oeps.txt")) --~ print(url.filename("file:///oeps.txt")) @@ -108,12 +298,30 @@ end --~ print(url.filename("/oeps.txt")) --~ from the spec on the web (sort of): ---~ ---~ function test(str) ---~ print(table.serialize(url.hashed(str))) + +--~ local function test(str) +--~ local t = url.hashed(str) +--~ t.constructed = url.construct(t) +--~ print(table.serialize(t)) --~ end ---~ ---~ test("%56pass%20words") + +--~ inspect(url.hashed("http://www.pragma-ade.com/test%20test?test=test%20test&x=123%3d45")) +--~ inspect(url.hashed("http://www.pragma-ade.com/test%20test?test=test%20test&x=123%3d45")) + +--~ test("sys:///./colo-rgb") + +--~ test("/data/site/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733/figuur-cow.jpg") +--~ test("file:///M:/q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733") +--~ test("M:/q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733") +--~ test("file:///q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733") +--~ test("/q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733") + +--~ test("file:///cow%20with%20spaces") +--~ test("file:///cow%20with%20spaces.pdf") +--~ test("cow%20with%20spaces.pdf") +--~ test("some%20file") +--~ test("/etc/passwords") +--~ test("http://www.myself.com/some%20words.html") --~ test("file:///c:/oeps.txt") --~ test("file:///c|/oeps.txt") --~ test("file:///etc/oeps.txt") @@ -127,7 +335,6 @@ end --~ test("tel:+1-816-555-1212") --~ test("telnet://192.0.2.16:80/") --~ test("urn:oasis:names:specification:docbook:dtd:xml:4.1.2") ---~ test("/etc/passwords") --~ test("http://www.pragma-ade.com/spaced%20name") --~ test("zip:///oeps/oeps.zip#bla/bla.tex") |