libcruft-util/ip.cpp.rl

112 lines
2.7 KiB
Ragel

/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim 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. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2011 Danny Robson <danny@blubinc.net>
*/
#include "ip.hpp"
#include <stdexcept>
#include <iostream>
using namespace std;
const ipv4::ip ipv4::ip::LOOPBACK ({ 127, 0, 0, 1 });
const ipv4::ip ipv4::ip::ANY ({ 0, 0, 0, 0 });
ipv4::ip::ip (uint8_t a, uint8_t b, uint8_t c, uint8_t d):
m_octets ({ a, b, c, d })
{ ; }
ipv4::ip&
ipv4::ip::operator = (const ipv4::ip &rhs) {
m_octets[0] = rhs.m_octets[0];
m_octets[1] = rhs.m_octets[1];
m_octets[2] = rhs.m_octets[2];
m_octets[3] = rhs.m_octets[3];
return *this;
}
bool
ipv4::ip::operator == (const ipv4::ip &rhs) const {
return m_octets[0] == rhs.m_octets[0] &&
m_octets[1] == rhs.m_octets[1] &&
m_octets[2] == rhs.m_octets[2] &&
m_octets[3] == rhs.m_octets[3];
}
// RFC 3986
%%{
machine ipv4;
octet = ( [0-9][0-9]? |
'1'[0-9][0-9] |
'2'[0-4][0-9] |
'25'[0-5])
> {
octetstart = fpc;
}
% {
octetend = fpc;
__octet = 0;
for (auto i = octetstart; i < octetend; ++i)
__octet = __octet * 10 + *i - '0';
};
ipv4 := (octet %{ __octets[0] = __octet; } '.'
octet %{ __octets[1] = __octet; } '.'
octet %{ __octets[2] = __octet; } '.'
octet %{ __octets[3] = __octet; })
> { __success = false; }
% { __success = true; }
$!{ __success = false; };
}%%
%%write data;
ipv4::ip
ipv4::ip::parse (const string &data) {
bool __success = true;
uint8_t __octets[4];
const char *octetstart, *octetend;
uint8_t __octet;
int cs = 0;
const char *p = data.data (),
*pe = p + data.size (),
*eof = pe;
%%write init;
%%write exec;
if (!__success)
throw invalid_argument(data);
return ipv4::ip(__octets[0],
__octets[1],
__octets[2],
__octets[3]);
}