share/lua/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 library is free software; you can redistribute it and/or
   7 -- modify it under the terms of the GNU Lesser General Public
   8 -- License as published by the Free Software Foundation; either
   9 -- version 2.1 of the License, or (at your option) any later version.
  10 --
  11 -- This library 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 GNU
  14 -- Lesser General Public License for more details.
  15 --
  16 -- You should have received a copy of the GNU Lesser General Public
  17 -- License along with this library; if not, write to the Free Software
  18 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 -- 02110-1301  USA
  20 --
  21
  22 --
  23 -- NOTE: These are helper functions to be used with lua-expat (lxp)
  24 --
  25
  26 local M = {}
  27
  28 --
  29 -- Find first element with the matching tag.
  30 --
  31 -- Returns: The matching table element.
  32 --
  33 function M.find_first_tag(t, tag)
  34   for i=1, #t do
  35     if t[i].tag == tag then
  36       return t[i]
  37     end
  38   end
  39   error("[find_first_tag] no match: tag=" .. tag)
  40 end
  41
  42 --[[
  43 function M.foo()
  44   local xml = '<foo><bar>baz</bar></foo>'
  45   require 'lxp.lom'
  46   local t = lxp.lom.parse(xml)
  47   local e = M.find_first_tag(t, 'bar')
  48   if e[1] ~= 'baz' then error('should be "baz"') end
  49 end
  50 M.foo()
  51 ]]--
  52
  53 return M
  54
  55 -- vim: set ts=2 sw=2 tw=72 expandtab: