5 Copyright (c) 2007-2008 Mauro Iazzi
7 Permission is hereby granted, free of charge, to any person
8 obtaining a copy of this software and associated documentation
9 files (the "Software"), to deal in the Software without
10 restriction, including without limitation the rights to use,
11 copy, modify, merge, publish, distribute, sublicense, and/or sell
12 copies of the Software, and to permit persons to whom the
13 Software is furnished to do so, subject to the following
16 The above copyright notice and this permission notice shall be
17 included in all copies or substantial portions of the Software.
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
21 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
23 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
24 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 OTHER DEALINGS IN THE SOFTWARE.
31 local parseargs
, collect
38 local strip_escapes
= function (s
)
39 s
= string.gsub(s
, '&(%a+);', escapes
)
46 string.gsub(s
, "([%w_]+)=([\"'])(.-)%2", function (w
, _
, a
)
47 arg
[strip_escapes(w
)] = strip_escapes(a
)
56 table.insert(stack
, top
)
57 local ni
,c
,label
,xarg
, empty
60 ni
,j
,c
,label
,xarg
, empty
= string.find(s
, "<(%/?)(%w+)(.-)(%/?)>", j
)
61 if not ni
then break end
62 local text
= string.sub(s
, i
, ni
-1)
63 if not string.find(text
, "^%s*$") then
64 table.insert(top
, strip_escapes(text
))
66 if empty
== "/" then -- empty element tag
67 table.insert(top
, {label
=label
, xarg
=parseargs(xarg
), empty
=1})
68 elseif c
== "" then -- start tag
69 top
= {label
=label
, xarg
=parseargs(xarg
)}
70 table.insert(stack
, top
) -- new level
72 local toclose
= table.remove(stack
) -- remove top
75 error("nothing to close with "..label
)
77 if toclose
.label
~= label
then
78 error("trying to close "..toclose
.label
.." with "..label
)
80 table.insert(top
, toclose
)
87 local text
= string.sub(s
, i
)
88 if not string.find(text
, "^%s*$") then
89 table.insert(stack
[#stack
], text
)
92 error("unclosed "..stack
[stack
.n
].label
)
94 return stack
[1], index