--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/lxp/totable.lua Fri Apr 23 21:18:24 2021 +0100
@@ -0,0 +1,117 @@
+-- See Copyright Notice in license.html
+-- Based on Luiz Henrique de Figueiredo's lxml:
+-- http://www.tecgraf.puc-rio.br/~lhf/ftp/lua/#lxml
+
+local lxp = require "lxp"
+
+local table = require"table"
+local tinsert, tremove = table.insert, table.remove
+local assert, pairs, tostring, type = assert, pairs, tostring, type
+
+-- auxiliary functions -------------------------------------------------------
+local function starttag (p, tag, attr)
+ local stack = p:getcallbacks().stack
+ local newelement = {[0] = tag}
+ for i = 1, #attr do
+ local attrname = attr[i]
+ local attrvalue = attr[attrname]
+ newelement[attrname] = attrvalue
+ end
+ tinsert(stack, newelement)
+end
+
+local function endtag (p, tag)
+ local stack = p:getcallbacks().stack
+ local element = tremove(stack)
+ assert(element[0] == tag, "Error while closing element: table[0] should be `"..tostring(tag).."' but is `"..tostring(element[0]).."'")
+ local level = #stack
+ tinsert(stack[level], element)
+end
+
+local function text (p, txt)
+ local stack = p:getcallbacks().stack
+ local element = stack[#stack]
+ local n = #element
+ if type(element[n]) == "string" and n > 0 then
+ element[n] = element[n] .. txt
+ else
+ tinsert(element, txt)
+ end
+end
+
+-- main function -------------------------------------------------------------
+local function parse (o)
+ local c = {
+ StartElement = starttag,
+ EndElement = endtag,
+ CharacterData = text,
+ _nonstrict = true,
+ stack = {{}},
+ }
+ local p = lxp.new(c)
+ if type(o) == "string" then
+ local status, err, line, col, pos = p:parse(o)
+ if not status then return nil, err, line, col, pos end
+ else
+ for l in pairs(o) do
+ local status, err, line, col, pos = p:parse(l)
+ if not status then return nil, err, line, col, pos end
+ end
+ end
+ local status, err, line, col, pos = p:parse() -- close document
+ if not status then return nil, err, line, col, pos end
+ p:close()
+ return c.stack[1][1]
+end
+
+-- utility functions ---------------------------------------------------------
+local function compact (t) -- remove empty entries
+ local n = 0
+ for i = 1, #t do
+ local v = t[i]
+ if v then
+ n = n+1
+ if n ~= i then
+ t[n] = v
+ t[i] = nil
+ end
+ else
+ t[i] = nil
+ end
+ end
+end
+
+local function clean (t) -- remove empty strings
+ for i = 1, #t do
+ local v = t[i]
+ local tv = type(v)
+ if tv == "table" then
+ clean (v)
+ elseif tv == "string" and v:match"^%s*$" then
+ t[i] = false
+ end
+ end
+ compact (t)
+end
+
+local function torecord (t) -- move 1-value subtables to table entries
+ for i = 1, #t do
+ local v = t[i]
+ if type(v) == "table" then
+ if #v == 1 and type(v[1]) == "string" and t[v[0]] == nil then
+ t[v[0]] = v[1]
+ t[i] = false
+ else
+ torecord (v)
+ end
+ end
+ end
+ compact (t)
+end
+
+return {
+ clean = clean,
+ compact = compact,
+ parse = parse,
+ torecord = torecord,
+}