diff options
Diffstat (limited to 'luaextra-lpeg.lua')
| -rw-r--r-- | luaextra-lpeg.lua | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/luaextra-lpeg.lua b/luaextra-lpeg.lua deleted file mode 100644 index 2e366a9..0000000 --- a/luaextra-lpeg.lua +++ /dev/null @@ -1,143 +0,0 @@ -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" -} - -local lpeg = require("lpeg") - -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 digit, sign = R('09'), S('+-') -local cr, lf, crlf = P("\r"), P("\n"), P("\r\n") -local utf8byte = 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.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.number = patterns.float + patterns.integer -patterns.oct = P("0") * R("07")^1 -patterns.octal = patterns.oct -patterns.HEX = P("0x") * R("09","AF")^1 -patterns.hex = P("0x") * R("09","af")^1 -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') - -function lpeg.anywhere(pattern) --slightly adapted from website - return P { P(pattern) + 1 * V(1) } -- why so complex? -end - -function lpeg.splitter(pattern, action) - return (((1-P(pattern))^1)/action+1)^0 -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 - -local capture = Ct(content^0) - -function string:splitlines() - return match(capture,self) -end - -patterns.textline = content - ---~ 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 - -local splitters_s, splitters_m = { }, { } - -local function splitat(separator,single) - local splitter = (single and splitters_s[separator]) or splitters_m[separator] - if not splitter then - separator = P(separator) - if single then - local other, any = C((1 - separator)^0), P(1) - 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 - end - return splitter -end - -lpeg.splitat = splitat - -local cache = { } - -function string:split(separator) - local c = cache[separator] - if not c then - c = Ct(splitat(separator)) - cache[separator] = c - end - return match(c,self) -end - -local cache = { } - -function string:checkedsplit(separator) - local c = cache[separator] - if not c then - separator = P(separator) - local other = C((1 - separator)^0) - c = Ct(separator^0 * other * (separator^1 * other)^0) - cache[separator] = c - end - return match(c,self) -end - ---~ function lpeg.L(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 ---~ end - ---~ from roberto's site: - -local f1 = string.byte - -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 - -patterns.utf8byte = patterns.utf8one/f1 + patterns.utf8two/f2 + patterns.utf8three/f3 + patterns.utf8four/f4 |