belcard_utils.cpp 1.33 KB
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/*
	belcard_utils.cpp
	Copyright (C) 2015  Belledonne Communications SARL

	This program 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.

	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.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

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#include "belcard/belcard_utils.hpp"

using namespace::std;

string belcard_fold(string input) {
	size_t crlf = 0;
	size_t next_crlf = 0;
	
	while (next_crlf != string::npos) {
		next_crlf = input.find("\r\n", crlf);
		if (next_crlf != string::npos) {
			if (next_crlf - crlf > 75) {
				input.insert(crlf + 74, "\r\n ");
				crlf += 76;
			} else {
				crlf = next_crlf + 2;
			}
		}
	}
	
	return input;
}

string belcard_unfold(string input) {
	size_t crlf = input.find("\r\n");
	
	while (crlf != string::npos) {
		if (isspace(input[crlf + 2])) {
			input.erase(crlf, 3);
		} else {
			crlf += 2;
		}
		
		crlf = input.find("\r\n", crlf);
	}
	
	return input;
}