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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef STRFND_HEADER
#define STRFND_HEADER
#include <string>
template <typename T>
class BasicStrfnd {
typedef std::basic_string<T> String;
String str;
size_t pos;
public:
BasicStrfnd(const String &s) : str(s), pos(0) {}
void start(const String &s) { str = s; pos = 0; }
size_t where() { return pos; }
void to(size_t i) { pos = i; }
bool at_end() { return pos >= str.size(); }
String what() { return str; }
String next(const String &sep)
{
if (pos >= str.size())
return String();
size_t n;
if (sep.empty() || (n = str.find(sep, pos)) == String::npos) {
n = str.size();
}
String ret = str.substr(pos, n - pos);
pos = n + sep.size();
return ret;
}
// Returns substr up to the next occurence of sep that isn't escaped with esc ('\\')
String next_esc(const String &sep, T esc=static_cast<T>('\\'))
{
if (pos >= str.size())
return String();
size_t n, old_p = pos;
do {
if (sep.empty() || (n = str.find(sep, pos)) == String::npos) {
pos = n = str.size();
break;
}
pos = n + sep.length();
} while (n > 0 && str[n - 1] == esc);
return str.substr(old_p, n - old_p);
}
void skip_over(const String &chars)
{
size_t p = str.find_first_not_of(chars, pos);
if (p != String::npos)
pos = p;
}
};
typedef BasicStrfnd<char> Strfnd;
typedef BasicStrfnd<wchar_t> WStrfnd;
#endif
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