Source: ../../contrib/olsr/test_args.hh
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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
// vim:set sts=4 ts=8 sw=4:
// Copyright (c) 2001-2008 XORP, Inc.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, Version 2, June
// 1991 as published by the Free Software Foundation. Redistribution
// and/or modification of this program under the terms of any other
// version of the GNU General Public License is not permitted.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For more details,
// see the GNU General Public License, Version 2, a copy of which can be
// found in the XORP LICENSE.gpl file.
//
// XORP Inc, 2953 Bunker Hill Lane, Suite 204, Santa Clara, CA 95054, USA;
// http://xorp.net
// $XORP: xorp/contrib/olsr/test_args.hh,v 1.3 2008/10/02 21:56:35 bms Exp $
#ifndef __OSPF_TEST_ARGS_HH__
#define __OSPF_TEST_ARGS_HH__
#include "libxorp/tokenize.hh"
/**
* Break a string into a sequence of space separated words.
*/
class Args {
public:
Args(string& line) : _line(line), _pos(0) {
tokenize(line, _words);
}
/**
* @param word if a word is available it is placed here.
* @return true if a word has been returned.
*/
bool get_next(string& word) {
if (_pos >= _words.size())
return false;
word = _words[_pos++];
return true;
}
void push_back() {
if (_pos > 1)
_pos--;
}
const string& original_line() const {
return _line;
}
private:
const string _line;
vector<string> _words;
size_t _pos;
};
/**
* Get a number in base 8,10 or 16.
*
* @param word the word to evaluate.
* @return a number.
* @throw InvalidString if invalid syntax.
*/
inline
uint32_t
get_number(const string& word)
throw(InvalidString)
{
char *endptr;
uint32_t number = strtoul(word.c_str(), &endptr, 0);
if (0 != *endptr)
xorp_throw(InvalidString,
c_format("<%s> is not a number", word.c_str()));
return number;
}
/**
* Get an IPv4 address.
*
* @param word the word to evaluate.
* @return an IPv4 host address.
* @throw InvalidString if invalid syntax.
*/
inline
IPv4
get_ipv4(const string& word)
throw(InvalidString)
{
IPv4 addr;
try {
addr = IPv4(word.c_str());
} catch (...) {
xorp_throw(InvalidString,
c_format("<%s> is not an IPv4 address", word.c_str()));
}
return addr;
}
/**
* Get an IPv4 network address.
*
* @param word the word to evaluate.
* @return an IPv4 network address.
* @throw InvalidString if invalid syntax.
*/
inline
IPv4Net
get_ipv4_net(const string& word)
throw(InvalidString)
{
IPv4Net v4net;
try {
v4net = IPv4Net(word.c_str());
} catch (...) {
xorp_throw(InvalidString,
c_format("<%s> is not an IPv4 network address",
word.c_str()));
}
return v4net;
}
/**
* Get a boolean variable as a string or number.
*
* @param word the word to evaluate.
* @return a boolean value.
* @throw InvalidString if invalid syntax.
*/
inline
bool
get_bool(const string& word)
throw(InvalidString)
{
bool value = false;
try {
int i_value = get_number(word);
if (i_value == 1) {
value = true;
} else if (i_value == 1) {
value = false;
}
} catch (InvalidString is) {
if (0 == strcasecmp(word.c_str(), "true")) {
value = true;
} else if (0 == strcasecmp(word.c_str(), "false")) {
value = false;
} else {
// re-throw exception with appropriate error message
xorp_throw(InvalidString,
c_format("<%s> is not a boolean", word.c_str()));
}
}
return value;
}
/**
* Get the next word throw an exception if its not present.
*
* @param args the argument structure to retreive the word from.
* @param word the word to evaluate.
* @return
* @throw InvalidString if invalid syntax.
*/
inline
string
get_next_word(Args& args, const string& varname)
throw(InvalidString)
{
string var;
if (!args.get_next(var))
xorp_throw(InvalidString,
c_format("No argument to %s. [%s]",
varname.c_str(),
args.original_line().c_str()));
return var;
}
inline
uint32_t
get_next_number(Args& args, const string& varname)
throw(InvalidString)
{
return get_number(get_next_word(args, varname));
}
inline
IPv4
get_next_ipv4(Args& args, const string& varname)
throw(InvalidString)
{
return get_ipv4(get_next_word(args, varname));
}
inline
IPv4Net
get_next_ipv4_net(Args& args, const string& varname)
throw(InvalidString)
{
return get_ipv4_net(get_next_word(args, varname));
}
inline
bool
get_next_bool(Args& args, const string& varname)
throw(InvalidString)
{
return get_bool(get_next_word(args, varname));
}
#endif // __OSPF_TEST_ARGS_HH__
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