share/common/quvi/lxph.lua

   1 -- libquvi-scripts
   2 -- Copyright (C) 2012  Toni Gundogdu <legatvs@gmail.com>
   3 --
   4 -- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
   5 --
   6 -- This program is free software: you can redistribute it and/or
   7 -- modify it under the terms of the GNU Affero General Public
   8 -- License as published by the Free Software Foundation, either
   9 -- version 3 of the License, or (at your option) any later version.
  10 --
  11 -- This program is distributed in the hope that it will be useful,
  12 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 -- GNU Affero General Public License for more details.
  15 --
  16 -- You should have received a copy of the GNU Affero General
  17 -- Public License along with this program.  If not, see
  18 -- <http://www.gnu.org/licenses/>.
  19 --
  20
  21 --
  22 -- NOTE: These are helper functions to be used with lua-expat (lxp)
  23 --
  24
  25 local M = {}
  26
  27 --
  28 -- Find first element with the matching tag.
  29 --
  30 -- Returns: The matching table element.
  31 --
  32 function M.find_first_tag(t, tag)
  33   for i=1, #t do
  34     if t[i].tag == tag then
  35       return t[i]
  36     end
  37   end
  38   error("[find_first_tag] no match: tag=" .. tag)
  39 end
  40
  41 --[[
  42 function M.foo()
  43   local xml = '<foo><bar>baz</bar></foo>'
  44   require 'lxp.lom'
  45   local t = lxp.lom.parse(xml)
  46   local e = M.find_first_tag(t, 'bar')
  47   if e[1] ~= 'baz' then error('should be "baz"') end
  48 end
  49 M.foo()
  50 ]]--
  51
  52 return M
  53
  54 -- vim: set ts=2 sw=2 tw=72 expandtab: