-- -*- coding: utf-8 -*-
--
-- ZanyBlue, an Ada library and framework for finite element analysis.
--
-- Copyright (c) 2012, 2016, Michael Rohan <mrohan@zanyblue.com>
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- * Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- * Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- * Neither the name of ZanyBlue nor the names of its contributors may
-- be used to endorse or promote products derived from this software
-- without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- @usage append parameter value
-- @summary append values to a list parameter
-- @start-doc
-- The append command adds a value to the end of a list parameter within
-- current scope. If the parameter does not exist, it is created as a list
-- value with a single element. If the parameter exists but is not a list,
-- the value is first converted to a string and then converted to a list with
-- a single value. The argument value is then append to this list.
--
-- Example::
--
-- ZBTest> print l1
-- The parameter "l1" is not defined
-- ZBTest> append l1 a
-- ZBTest> print l1
-- [a]
-- ZBTest> print -l l1
-- 1) "a"
-- ZBTest> append l1 b
-- ZBTest> print l1
-- [a, b]
-- ZBTest> print -l l1
-- 1) "a"
-- 2) "b"
with Ada.Strings.Wide_Fixed;
separate (ZBTest.Commands)
procedure Append_Command
(State : in out State_Type;
Args : List_Type)
is
use Ada.Strings.Wide_Fixed;
Param_Idx : Natural := 0;
Value_Idx : Natural := 0;
begin
for I in 2 .. Length (Args) loop
if Head (Value (Args, I), 1) = "-" then
raise Command_Usage_Error;
elsif Param_Idx = 0 then
Param_Idx := I;
elsif Value_Idx = 0 then
Value_Idx := I;
else
raise Command_Usage_Error;
end if;
end loop;
if Param_Idx * Value_Idx = 0 then
raise Command_Usage_Error;
end if;
State.Append (Value (Args, Param_Idx), Value (Args, Value_Idx));
end Append_Command;