+++ /dev/null
-////////////////////////////////////////////////////////////////////////////////
-//
-// Copyright 2006 - 2017, Paul Beckingham, Federico Hernandez.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// http://www.opensource.org/licenses/mit-license.php
-//
-////////////////////////////////////////////////////////////////////////////////
-
-#include <cmake.h>
-#include <shared.h>
-#include <cctype>
-
-static bool isPort (const std::string&, unsigned int&);
-static bool isChar (const std::string&, char, unsigned int&);
-static bool isEOS (const std::string&, unsigned int&);
-static bool isIPv4Block (const std::string&, unsigned int&);
-static bool isIPv4BlockSet (const std::string&, unsigned int&);
-static bool isIPv6Block (const std::string&, unsigned int&);
-static bool isIPv6BlockSet (const std::string&, unsigned int&);
-
-////////////////////////////////////////////////////////////////////////////////
-static bool isPort (const std::string& input, unsigned int& c)
-{
- auto start = c;
- while (std::isdigit (input[c]))
- ++c;
-
- return c - start > 0 &&
- c - start < 6;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-static bool isChar (const std::string& input, char character, unsigned int& c)
-{
- if (input[c] == character)
- {
- ++c;
- return true;
- }
-
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-static bool isEOS (const std::string& input, unsigned int& c)
-{
- return c >= input.length ();
-}
-
-////////////////////////////////////////////////////////////////////////////////
-static bool isIPv4Block (const std::string& input, unsigned int& c)
-{
- auto start = c;
- while (std::isdigit (input[c]))
- ++c;
-
- if (c - start > 0 &&
- c - start < 4)
- {
- auto byte = std::stoi (input.substr (start, c - start));
- if (byte < 256)
- return true;
- }
-
- c = start;
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-static bool isIPv4BlockSet (const std::string& input, unsigned int& c)
-{
- auto start = c;
-
- if (isIPv4Block (input, c) &&
- isChar (input, '.', c) &&
- isIPv4Block (input, c) &&
- isChar (input, '.', c) &&
- isIPv4Block (input, c) &&
- isChar (input, '.', c) &&
- isIPv4Block (input, c))
- {
-
- return true;
- }
-
- c = start;
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-static bool isIPv6Block (const std::string& input, unsigned int& c)
-{
- auto start = c;
- while (std::isxdigit (input[c]))
- ++c;
-
- if (c - start > 0 &&
- c - start < 5)
- {
- return true;
- }
-
- c = start;
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// at least one non-empty block, or '::'
-// at least two colons
-// 8 or less blocks
-static bool isIPv6BlockSet (const std::string& input, unsigned int& c)
-{
- auto start = c;
- int count_colons {0};
- int count_blocks {0};
-
- while (1)
- {
- if (isEOS (input, c))
- {
- if (c == start)
- return false;
-
- break;
- }
-
- else if (isChar (input, ':', c))
- ++count_colons;
-
- else if (isIPv4BlockSet (input, c))
- ++count_blocks;
-
- else if (isIPv6Block (input, c))
- ++count_blocks;
-
- else if (isChar (input, '.', c) ||
- isChar (input, ']', c))
- {
- --c;
- break;
- }
-
- else
- break;
- }
-
- if (count_colons >= 2 &&
- count_colons <= 7 &&
- ((count_blocks == 0 && input.substr (start, c) == "::") || count_blocks >= 1) &&
- count_blocks <= 8)
- {
- return true;
- }
-
- c = start;
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// <address>:<port>
-// <address>
-bool isIPv4Address (const std::string& input, std::string& address, int& port)
-{
- unsigned int c = 0;
- if (isIPv4BlockSet (input, c))
- {
- auto colon = c;
- if (isChar (input, ':', c))
- if (! isPort (input, c))
- return false;
-
- if (isEOS (input, c))
- {
- address = input.substr (0, std::min (c, colon));
- if (! isEOS (input, colon))
- port = std::stoi (input.substr (colon + 1));
-
- return true;
- }
- }
-
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// [<address>]:<port>
-// <address>
-bool isIPv6Address (const std::string& input, std::string& address, int& port)
-{
- unsigned int c = 0;
-
- if (isChar (input, '[', c) &&
- isIPv6BlockSet (input, c) &&
- isChar (input, ']', c))
- {
- auto colon = c;
- if (isChar (input, ':', c) &&
- isPort (input, c) &&
- isEOS (input, c))
- {
- address = input.substr (1, colon - 2);
- port = std::stoi (input.substr (colon + 1));
- return true;
- }
- }
-
- c = 0;
- if (isIPv6BlockSet (input, c) &&
- isEOS (input, c))
- {
- address = input;
- port = 0;
- return true;
- }
-
- return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
projects / gen-shell.git / blobdiff