1%%
2%% %CopyrightBegin%
3%%
4%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
5%%
6%% Licensed under the Apache License, Version 2.0 (the "License");
7%% you may not use this file except in compliance with the License.
8%% You may obtain a copy of the License at
9%%
10%%     http://www.apache.org/licenses/LICENSE-2.0
11%%
12%% Unless required by applicable law or agreed to in writing, software
13%% distributed under the License is distributed on an "AS IS" BASIS,
14%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15%% See the License for the specific language governing permissions and
16%% limitations under the License.
17%%
18%% %CopyrightEnd%
19%%
20
21%%
22-module(xmerl_xpath_lib).
23
24-include("xmerl.hrl").
25
26-export([eval/3]).
27
28-define(string(X), #xmlObj{type = string,
29			   value = X}).
30-define(number(X), #xmlObj{type = number,
31			   value = X}).
32
33
34eval(primary_expr,PrimExpr,C) ->
35    primary_expr(PrimExpr, C);
36eval(predicate,Pred,C) ->
37    xmerl_xpath_pred:eval(Pred,C).
38
39primary_expr({number, N}, _C) ->
40    ?number(N);
41primary_expr({literal, S}, _C) ->
42    ?string(S);
43primary_expr({function_call, F, Args}, C) ->
44    case xmerl_xpath_pred:core_function(F) of
45	{true, F1} ->
46	    xmerl_xpath_pred:F1(C, Args);
47	true ->
48	    xmerl_xpath_pred:F(C, Args);
49	false ->
50	    %% here, we should look up the function in the context provided
51	    %% by the caller, but we haven't figured this out yet.
52	    exit({not_a_core_function, F})
53    end;
54primary_expr(PrimExpr, _C) ->
55    exit({primary_expression, {not_implemented, PrimExpr}}).
56
57