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/* $Id: XmlEscape.cpp 1649 2009-10-19 14:35:01Z terpstra $
*
* XmlEscape.cpp - A stream manipulator-like thing for escaping XML
*
* Copyright (C) 2002 - Wesley W. Terpstra
*
* License: GPL
*
* Authors: 'Wesley W. Terpstra' <wesley@terpstra.ca>
*
* 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; version 2.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _FILE_OFFSET_BITS 64
#include "XmlEscape.h"
#include <cstring>
XmlEscape xmlEscape;
ostream& XmlOstream::operator << (char c)
{
if (c >= 0 && c <= 0x1f)
{
switch (c)
{
case '\n': return o << "\n<br/>";
case '\t': return o << "<tab/>";
case '\r': return o;
default: return o << "?"; // drop the char
}
}
else
{
switch (c)
{
case '\'': return o << "'";
case '<': return o << "<";
case '>': return o << ">";
case '"': return o << """;
case '&': return o << "&";
default: return o << c; // leave it alone
// this case includes high-ascii utf-8
}
}
}
string::size_type find_first_offensive_byte(const char* s, const char* e)
{
const char* b = s;
while (s != e)
{
char x = *s;
if (x >= 0 && x <= 0x1f)
{ // control char in utf-8 eh?
return s - b;
}
else
{
switch (x)
{
case '\'':
case '<':
case '>':
case '"':
case '&':
// xml doesn't like these dudes
return s - b;
}
}
++s;
}
return s - b; // the eos
}
ostream& XmlOstream::operator << (const string& s)
{
string::size_type b = 0, e = s.length();
while (1)
{
string::size_type x = find_first_offensive_byte(
s.c_str() + b, s.c_str() + e) + b;
o.write(s.c_str() + b, x - b);
if (x == e) return o;
*this << s[x];
b = x+1;
}
}
ostream& XmlOstream::operator << (const char* s)
{
while (1)
{
string::size_type x = find_first_offensive_byte(s, 0);
o.write(s, x);
s += x;
if (!*s) return o;
*this << *s;
++s;
}
}
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