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//
// aegis - project change supervisor
// Copyright (C) 2004-2006, 2008 Peter Miller
//
// 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/>.
//
#include <common/ac/ctype.h>
#include <common/ac/string.h>
#include <common/nstring.h>
#include <common/nstring/accumulator.h>
nstring
nstring::url_quote()
const
{
static nstring_accumulator sa;
sa.clear();
const char *sp = c_str();
for (;;)
{
unsigned char c = *sp++;
if (!c)
break;
// C locale
if (!isprint(c) || strchr(" \"#%&'+:=?~^|$(){}[]", c))
{
//
// #:? URL special characters
// % escape the escape character
// ~ illegal in portable character sets
// &= confuse forms-based browsers
// "' I've included some shell meta
// ${}[] characters here, too, because
// ^|() these are usually passed through
// shell scripts.
//
static char hex[] = "0123456789ABCDEF";
sa.push_back('%');
sa.push_back(hex[(c >> 4) & 15]);
sa.push_back(hex[c & 15]);
}
else
sa.push_back(c);
}
return sa.mkstr();
}
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