diff options
Diffstat (limited to 'lualibs-unicode.lua')
| -rw-r--r-- | lualibs-unicode.lua | 663 |
1 files changed, 383 insertions, 280 deletions
diff --git a/lualibs-unicode.lua b/lualibs-unicode.lua index fb4ea37..02dd1a0 100644 --- a/lualibs-unicode.lua +++ b/lualibs-unicode.lua @@ -56,7 +56,6 @@ local p_utfbom = patterns.utfbom local p_newline = patterns.newline local p_whitespace = patterns.whitespace - if not unicode then unicode = { utf = utf } -- for a while @@ -525,23 +524,59 @@ end -- end, pattern -- end -function utf.remapper(mapping) - local pattern = type(mapping) == "table" and tabletopattern(mapping) or p_utf8char - local pattern = Cs((pattern/mapping + p_utf8char)^0) - return function(str) - if not str or str == "" then - return "" +function utf.remapper(mapping,option) -- static also returns a pattern + local variant = type(mapping) + if variant == "table" then + if option == "dynamic" then + local pattern = false + table.setmetatablenewindex(mapping,function(t,k,v) rawset(t,k,v) pattern = false end) + return function(str) + if not str or str == "" then + return "" + else + if not pattern then + pattern = Cs((tabletopattern(mapping)/mapping + p_utf8char)^0) + end + return lpegmatch(pattern,str) + end + end + elseif option == "pattern" then + return Cs((tabletopattern(mapping)/mapping + p_utf8char)^0) + -- elseif option == "static" then + else + local pattern = Cs((tabletopattern(mapping)/mapping + p_utf8char)^0) + return function(str) + if not str or str == "" then + return "" + else + return lpegmatch(pattern,str) + end + end, pattern + end + elseif variant == "function" then + if option == "pattern" then + return Cs((p_utf8char/mapping + p_utf8char)^0) else - return lpegmatch(pattern,str) + local pattern = Cs((p_utf8char/mapping + p_utf8char)^0) + return function(str) + if not str or str == "" then + return "" + else + return lpegmatch(pattern,str) + end + end, pattern end - end, pattern + else + -- is actually an error + return function(str) + return str or "" + end + end end -- local remap = utf.remapper { a = 'd', b = "c", c = "b", d = "a" } -- print(remap("abcd 1234 abcd")) --- - function utf.replacer(t) -- no precheck, always string builder local r = replacer(t,false,false,true) return function(str) @@ -647,285 +682,359 @@ end local utf16_to_utf8_be, utf16_to_utf8_le local utf32_to_utf8_be, utf32_to_utf8_le -local utf_16_be_linesplitter = patterns.utfbom_16_be^-1 * lpeg.tsplitat(patterns.utf_16_be_nl) -local utf_16_le_linesplitter = patterns.utfbom_16_le^-1 * lpeg.tsplitat(patterns.utf_16_le_nl) +local utf_16_be_getbom = patterns.utfbom_16_be^-1 +local utf_16_le_getbom = patterns.utfbom_16_le^-1 +local utf_32_be_getbom = patterns.utfbom_32_be^-1 +local utf_32_le_getbom = patterns.utfbom_32_le^-1 + +local utf_16_be_linesplitter = utf_16_be_getbom * lpeg.tsplitat(patterns.utf_16_be_nl) +local utf_16_le_linesplitter = utf_16_le_getbom * lpeg.tsplitat(patterns.utf_16_le_nl) +local utf_32_be_linesplitter = utf_32_be_getbom * lpeg.tsplitat(patterns.utf_32_be_nl) +local utf_32_le_linesplitter = utf_32_le_getbom * lpeg.tsplitat(patterns.utf_32_le_nl) + +-- we have three possibilities: bytepairs (using tables), gmatch (using tables), gsub and +-- lpeg. Bytepairs are the fastert but as soon as we need to remove bombs and so the gain +-- is less due to more testing. Also, we seldom have to convert utf16 so we don't care to +-- much about a few milliseconds more runtime. The lpeg variant is upto 20% slower but +-- still pretty fast. +-- +-- for historic resone we keep the bytepairs variants around .. beware they don't grab the +-- bom like the lpegs do so they're not dropins in the functions that follow +-- +-- utf16_to_utf8_be = function(s) +-- if not s then +-- return nil +-- elseif s == "" then +-- return "" +-- end +-- local result, r, more = { }, 0, 0 +-- for left, right in bytepairs(s) do +-- if right then +-- local now = 256*left + right +-- if more > 0 then +-- now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong +-- more = 0 +-- r = r + 1 +-- result[r] = utfchar(now) +-- elseif now >= 0xD800 and now <= 0xDBFF then +-- more = now +-- else +-- r = r + 1 +-- result[r] = utfchar(now) +-- end +-- end +-- end +-- return concat(result) +-- end +-- +-- local utf16_to_utf8_be_t = function(t) +-- if not t then +-- return nil +-- elseif type(t) == "string" then +-- t = lpegmatch(utf_16_be_linesplitter,t) +-- end +-- local result = { } -- we reuse result +-- for i=1,#t do +-- local s = t[i] +-- if s ~= "" then +-- local r, more = 0, 0 +-- for left, right in bytepairs(s) do +-- if right then +-- local now = 256*left + right +-- if more > 0 then +-- now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong +-- more = 0 +-- r = r + 1 +-- result[r] = utfchar(now) +-- elseif now >= 0xD800 and now <= 0xDBFF then +-- more = now +-- else +-- r = r + 1 +-- result[r] = utfchar(now) +-- end +-- end +-- end +-- t[i] = concat(result,"",1,r) -- we reused tmp, hence t +-- end +-- end +-- return t +-- end +-- +-- utf16_to_utf8_le = function(s) +-- if not s then +-- return nil +-- elseif s == "" then +-- return "" +-- end +-- local result, r, more = { }, 0, 0 +-- for left, right in bytepairs(s) do +-- if right then +-- local now = 256*right + left +-- if more > 0 then +-- now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong +-- more = 0 +-- r = r + 1 +-- result[r] = utfchar(now) +-- elseif now >= 0xD800 and now <= 0xDBFF then +-- more = now +-- else +-- r = r + 1 +-- result[r] = utfchar(now) +-- end +-- end +-- end +-- return concat(result) +-- end +-- +-- local utf16_to_utf8_le_t = function(t) +-- if not t then +-- return nil +-- elseif type(t) == "string" then +-- t = lpegmatch(utf_16_le_linesplitter,t) +-- end +-- local result = { } -- we reuse result +-- for i=1,#t do +-- local s = t[i] +-- if s ~= "" then +-- local r, more = 0, 0 +-- for left, right in bytepairs(s) do +-- if right then +-- local now = 256*right + left +-- if more > 0 then +-- now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong +-- more = 0 +-- r = r + 1 +-- result[r] = utfchar(now) +-- elseif now >= 0xD800 and now <= 0xDBFF then +-- more = now +-- else +-- r = r + 1 +-- result[r] = utfchar(now) +-- end +-- end +-- end +-- t[i] = concat(result,"",1,r) -- we reused tmp, hence t +-- end +-- end +-- return t +-- end +-- +-- local utf32_to_utf8_be_t = function(t) +-- if not t then +-- return nil +-- elseif type(t) == "string" then +-- t = lpegmatch(utflinesplitter,t) +-- end +-- local result = { } -- we reuse result +-- for i=1,#t do +-- local r, more = 0, -1 +-- for a,b in bytepairs(t[i]) do +-- if a and b then +-- if more < 0 then +-- more = 256*256*256*a + 256*256*b +-- else +-- r = r + 1 +-- result[t] = utfchar(more + 256*a + b) +-- more = -1 +-- end +-- else +-- break +-- end +-- end +-- t[i] = concat(result,"",1,r) +-- end +-- return t +-- end +-- +-- local utf32_to_utf8_le_t = function(t) +-- if not t then +-- return nil +-- elseif type(t) == "string" then +-- t = lpegmatch(utflinesplitter,t) +-- end +-- local result = { } -- we reuse result +-- for i=1,#t do +-- local r, more = 0, -1 +-- for a,b in bytepairs(t[i]) do +-- if a and b then +-- if more < 0 then +-- more = 256*b + a +-- else +-- r = r + 1 +-- result[t] = utfchar(more + 256*256*256*b + 256*256*a) +-- more = -1 +-- end +-- else +-- break +-- end +-- end +-- t[i] = concat(result,"",1,r) +-- end +-- return t +-- end + +local more = 0 + +local p_utf16_to_utf8_be = C(1) * C(1) /function(left,right) + local now = 256*byte(left) + byte(right) + if more > 0 then + now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong + more = 0 + return utfchar(now) + elseif now >= 0xD800 and now <= 0xDBFF then + more = now + return "" -- else the c's end up in the stream + else + return utfchar(now) + end +end --- we have three possibilities: +local p_utf16_to_utf8_le = C(1) * C(1) /function(right,left) + local now = 256*byte(left) + byte(right) + if more > 0 then + now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong + more = 0 + return utfchar(now) + elseif now >= 0xD800 and now <= 0xDBFF then + more = now + return "" -- else the c's end up in the stream + else + return utfchar(now) + end +end +local p_utf32_to_utf8_be = C(1) * C(1) * C(1) * C(1) /function(a,b,c,d) + return utfchar(256*256*256*byte(a) + 256*256*byte(b) + 256*byte(c) + byte(d)) +end --- bytepairs: 0.048 --- gmatch : 0.069 --- lpeg : 0.089 (match time captures) +local p_utf32_to_utf8_le = C(1) * C(1) * C(1) * C(1) /function(a,b,c,d) + return utfchar(256*256*256*byte(d) + 256*256*byte(c) + 256*byte(b) + byte(a)) +end -if bytepairs then +p_utf16_to_utf8_be = P(true) / function() more = 0 end * utf_16_be_getbom * Cs(p_utf16_to_utf8_be^0) +p_utf16_to_utf8_le = P(true) / function() more = 0 end * utf_16_le_getbom * Cs(p_utf16_to_utf8_le^0) +p_utf32_to_utf8_be = P(true) / function() more = 0 end * utf_32_be_getbom * Cs(p_utf32_to_utf8_be^0) +p_utf32_to_utf8_le = P(true) / function() more = 0 end * utf_32_le_getbom * Cs(p_utf32_to_utf8_le^0) - -- with a little bit more code we could include the linesplitter +patterns.utf16_to_utf8_be = p_utf16_to_utf8_be +patterns.utf16_to_utf8_le = p_utf16_to_utf8_le +patterns.utf32_to_utf8_be = p_utf32_to_utf8_be +patterns.utf32_to_utf8_le = p_utf32_to_utf8_le - utf16_to_utf8_be = function(t) - if type(t) == "string" then - t = lpegmatch(utf_16_be_linesplitter,t) - end - local result = { } -- we reuse result - for i=1,#t do - local r, more = 0, 0 - for left, right in bytepairs(t[i]) do - if right then - local now = 256*left + right - if more > 0 then - now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong - more = 0 - r = r + 1 - result[r] = utfchar(now) - elseif now >= 0xD800 and now <= 0xDBFF then - more = now - else - r = r + 1 - result[r] = utfchar(now) - end - end - end - t[i] = concat(result,"",1,r) -- we reused tmp, hence t - end - return t +utf16_to_utf8_be = function(s) + if s and s ~= "" then + return lpegmatch(p_utf16_to_utf8_be,s) + else + return s end +end - utf16_to_utf8_le = function(t) - if type(t) == "string" then - t = lpegmatch(utf_16_le_linesplitter,t) - end - local result = { } -- we reuse result - for i=1,#t do - local r, more = 0, 0 - for left, right in bytepairs(t[i]) do - if right then - local now = 256*right + left - if more > 0 then - now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong - more = 0 - r = r + 1 - result[r] = utfchar(now) - elseif now >= 0xD800 and now <= 0xDBFF then - more = now - else - r = r + 1 - result[r] = utfchar(now) - end - end - end - t[i] = concat(result,"",1,r) -- we reused tmp, hence t +local utf16_to_utf8_be_t = function(t) + if not t then + return nil + elseif type(t) == "string" then + t = lpegmatch(utf_16_be_linesplitter,t) + end + for i=1,#t do + local s = t[i] + if s ~= "" then + t[i] = lpegmatch(p_utf16_to_utf8_be,s) end - return t end + return t +end - utf32_to_utf8_be = function(t) - if type(t) == "string" then - t = lpegmatch(utflinesplitter,t) - end - local result = { } -- we reuse result - for i=1,#t do - local r, more = 0, -1 - for a,b in bytepairs(t[i]) do - if a and b then - if more < 0 then - more = 256*256*256*a + 256*256*b - else - r = r + 1 - result[t] = utfchar(more + 256*a + b) - more = -1 - end - else - break - end - end - t[i] = concat(result,"",1,r) - end - return t +utf16_to_utf8_le = function(s) + if s and s ~= "" then + return lpegmatch(p_utf16_to_utf8_le,s) + else + return s end +end - utf32_to_utf8_le = function(t) - if type(t) == "string" then - t = lpegmatch(utflinesplitter,t) - end - local result = { } -- we reuse result - for i=1,#t do - local r, more = 0, -1 - for a,b in bytepairs(t[i]) do - if a and b then - if more < 0 then - more = 256*b + a - else - r = r + 1 - result[t] = utfchar(more + 256*256*256*b + 256*256*a) - more = -1 - end - else - break - end - end - t[i] = concat(result,"",1,r) +local utf16_to_utf8_le_t = function(t) + if not t then + return nil + elseif type(t) == "string" then + t = lpegmatch(utf_16_le_linesplitter,t) + end + for i=1,#t do + local s = t[i] + if s ~= "" then + t[i] = lpegmatch(p_utf16_to_utf8_le,s) end - return t end + return t +end -else - - utf16_to_utf8_be = function(t) - if type(t) == "string" then - t = lpegmatch(utf_16_be_linesplitter,t) - end - local result = { } -- we reuse result - for i=1,#t do - local r, more = 0, 0 - for left, right in gmatch(t[i],"(.)(.)") do - if left == "\000" then -- experiment - r = r + 1 - result[r] = utfchar(byte(right)) - elseif right then - local now = 256*byte(left) + byte(right) - if more > 0 then - now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong - more = 0 - r = r + 1 - result[r] = utfchar(now) - elseif now >= 0xD800 and now <= 0xDBFF then - more = now - else - r = r + 1 - result[r] = utfchar(now) - end - end - end - t[i] = concat(result,"",1,r) -- we reused tmp, hence t - end - return t +utf32_to_utf8_be = function(s) + if s and s ~= "" then + return lpegmatch(p_utf32_to_utf8_be,s) + else + return s end +end - utf16_to_utf8_le = function(t) - if type(t) == "string" then - t = lpegmatch(utf_16_le_linesplitter,t) - end - local result = { } -- we reuse result - for i=1,#t do - local r, more = 0, 0 - for left, right in gmatch(t[i],"(.)(.)") do - if right == "\000" then - r = r + 1 - result[r] = utfchar(byte(left)) - elseif right then - local now = 256*byte(right) + byte(left) - if more > 0 then - now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong - more = 0 - r = r + 1 - result[r] = utfchar(now) - elseif now >= 0xD800 and now <= 0xDBFF then - more = now - else - r = r + 1 - result[r] = utfchar(now) - end - end - end - t[i] = concat(result,"",1,r) -- we reused tmp, hence t +local utf32_to_utf8_be_t = function(t) + if not t then + return nil + elseif type(t) == "string" then + t = lpegmatch(utf_32_be_linesplitter,t) + end + for i=1,#t do + local s = t[i] + if s ~= "" then + t[i] = lpegmatch(p_utf32_to_utf8_be,s) end - return t end + return t +end - utf32_to_utf8_le = function() return { } end -- never used anyway - utf32_to_utf8_be = function() return { } end -- never used anyway - - -- the next one is slighty slower - - -- local result, lines, r, more = { }, { }, 0, 0 - -- - -- local simple = Cmt( - -- C(1) * C(1), function(str,p,left,right) - -- local now = 256*byte(left) + byte(right) - -- if more > 0 then - -- now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong - -- more = 0 - -- r = r + 1 - -- result[r] = utfchar(now) - -- elseif now >= 0xD800 and now <= 0xDBFF then - -- more = now - -- else - -- r = r + 1 - -- result[r] = utfchar(now) - -- end - -- return p - -- end - -- ) - -- - -- local complex = Cmt( - -- C(1) * C(1), function(str,p,left,right) - -- local now = 256*byte(left) + byte(right) - -- if more > 0 then - -- now = (more-0xD800)*0x400 + (now-0xDC00) + 0x10000 -- the 0x10000 smells wrong - -- more = 0 - -- r = r + 1 - -- result[r] = utfchar(now) - -- elseif now >= 0xD800 and now <= 0xDBFF then - -- more = now - -- else - -- r = r + 1 - -- result[r] = utfchar(now) - -- end - -- return p - -- end - -- ) - -- - -- local lineend = Cmt ( - -- patterns.utf_16_be_nl, function(str,p) - -- lines[#lines+1] = concat(result,"",1,r) - -- r, more = 0, 0 - -- return p - -- end - -- ) - -- - -- local be_1 = patterns.utfbom_16_be^-1 * (simple + complex)^0 - -- local be_2 = patterns.utfbom_16_be^-1 * (lineend + simple + complex)^0 - -- - -- utf16_to_utf8_be = function(t) - -- if type(t) == "string" then - -- local s = t - -- lines, r, more = { }, 0, 0 - -- lpegmatch(be_2,s) - -- if r > 0 then - -- lines[#lines+1] = concat(result,"",1,r) - -- end - -- result = { } - -- return lines - -- else - -- for i=1,#t do - -- r, more = 0, 0 - -- lpegmatch(be_1,t[i]) - -- t[i] = concat(result,"",1,r) - -- end - -- result = { } - -- return t - -- end - -- end +utf32_to_utf8_le = function(s) + if s and s ~= "" then + return lpegmatch(p_utf32_to_utf8_le,s) + else + return s + end +end +local utf32_to_utf8_le_t = function(t) + if not t then + return nil + elseif type(t) == "string" then + t = lpegmatch(utf_32_le_linesplitter,t) + end + for i=1,#t do + local s = t[i] + if s ~= "" then + t[i] = lpegmatch(p_utf32_to_utf8_le,s) + end + end + return t end -utf.utf16_to_utf8_le = utf16_to_utf8_le -utf.utf16_to_utf8_be = utf16_to_utf8_be -utf.utf32_to_utf8_le = utf32_to_utf8_le -utf.utf32_to_utf8_be = utf32_to_utf8_be +utf.utf16_to_utf8_le_t = utf16_to_utf8_le_t +utf.utf16_to_utf8_be_t = utf16_to_utf8_be_t +utf.utf32_to_utf8_le_t = utf32_to_utf8_le_t +utf.utf32_to_utf8_be_t = utf32_to_utf8_be_t -function utf.utf8_to_utf8(t) +utf.utf16_to_utf8_le = utf16_to_utf8_le +utf.utf16_to_utf8_be = utf16_to_utf8_be +utf.utf32_to_utf8_le = utf32_to_utf8_le +utf.utf32_to_utf8_be = utf32_to_utf8_be + +function utf.utf8_to_utf8_t(t) return type(t) == "string" and lpegmatch(utflinesplitter,t) or t end -function utf.utf16_to_utf8(t,endian) - return endian and utf16_to_utf8_be(t) or utf16_to_utf8_le(t) or t +function utf.utf16_to_utf8_t(t,endian) + return endian and utf16_to_utf8_be_t(t) or utf16_to_utf8_le_t(t) or t end -function utf.utf32_to_utf8(t,endian) - return endian and utf32_to_utf8_be(t) or utf32_to_utf8_le(t) or t +function utf.utf32_to_utf8_t(t,endian) + return endian and utf32_to_utf8_be_t(t) or utf32_to_utf8_le_t(t) or t end -local function little(c) - local b = byte(c) +local function little(b) if b < 0x10000 then return char(b%256,b/256) else @@ -935,8 +1044,7 @@ local function little(c) end end -local function big(c) - local b = byte(c) +local function big(b) if b < 0x10000 then return char(b/256,b%256) else @@ -946,18 +1054,10 @@ local function big(c) end end --- function utf.utf8_to_utf16(str,littleendian) --- if littleendian then --- return char(255,254) .. utfgsub(str,".",little) --- else --- return char(254,255) .. utfgsub(str,".",big) --- end --- end - -local _, l_remap = utf.remapper(little) -local _, b_remap = utf.remapper(big) +local l_remap = Cs((p_utf8byte/little+P(1)/"")^0) +local b_remap = Cs((p_utf8byte/big +P(1)/"")^0) -function utf.utf8_to_utf16_be(str,nobom) +local function utf8_to_utf16_be(str,nobom) if nobom then return lpegmatch(b_remap,str) else @@ -965,7 +1065,7 @@ function utf.utf8_to_utf16_be(str,nobom) end end -function utf.utf8_to_utf16_le(str,nobom) +local function utf8_to_utf16_le(str,nobom) if nobom then return lpegmatch(l_remap,str) else @@ -973,11 +1073,14 @@ function utf.utf8_to_utf16_le(str,nobom) end end +utf.utf8_to_utf16_be = utf8_to_utf16_be +utf.utf8_to_utf16_le = utf8_to_utf16_le + function utf.utf8_to_utf16(str,littleendian,nobom) if littleendian then - return utf.utf8_to_utf16_le(str,nobom) + return utf8_to_utf16_le(str,nobom) else - return utf.utf8_to_utf16_be(str,nobom) + return utf8_to_utf16_be(str,nobom) end end @@ -1008,16 +1111,16 @@ function utf.xstring(s) end function utf.toeight(str) - if not str then + if not str or str == "" then return nil end local utftype = lpegmatch(p_utfstricttype,str) if utftype == "utf-8" then - return sub(str,4) - elseif utftype == "utf-16-le" then - return utf16_to_utf8_le(str) + return sub(str,4) -- remove the bom elseif utftype == "utf-16-be" then - return utf16_to_utf8_ne(str) + return utf16_to_utf8_be(str) -- bom gets removed + elseif utftype == "utf-16-le" then + return utf16_to_utf8_le(str) -- bom gets removed else return str end |