mirror of https://github.com/minetest/minetest.git
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include <string>
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#include <string_view>
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// FIXME: convert this class to string_view
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template <typename T>
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class BasicStrfnd {
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typedef std::basic_string<T> String;
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String str;
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size_t pos;
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public:
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BasicStrfnd(const String &s) { start(s); }
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BasicStrfnd(const T *ptr) { str = ptr; pos = 0; }
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BasicStrfnd(std::basic_string_view<T> sv) { str = sv; pos = 0; }
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void start(const String &s) { str = s; pos = 0; }
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size_t where() { return pos; }
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void to(size_t i) { pos = i; }
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bool at_end() { return pos >= str.size(); }
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String what() { return str; }
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String next(const String &sep)
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{
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if (pos >= str.size())
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return String();
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size_t n;
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if (sep.empty() || (n = str.find(sep, pos)) == String::npos) {
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n = str.size();
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}
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String ret = str.substr(pos, n - pos);
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pos = n + sep.size();
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return ret;
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}
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// Returns substr up to the next occurrence of sep that isn't escaped with esc ('\\')
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String next_esc(const String &sep, T esc=static_cast<T>('\\'))
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{
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if (pos >= str.size())
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return String();
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size_t n, old_p = pos;
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do {
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if (sep.empty() || (n = str.find(sep, pos)) == String::npos) {
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pos = n = str.size();
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break;
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}
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pos = n + sep.length();
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} while (n > 0 && str[n - 1] == esc);
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return str.substr(old_p, n - old_p);
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}
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void skip_over(const String &chars)
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{
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size_t p = str.find_first_not_of(chars, pos);
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if (p != String::npos)
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pos = p;
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}
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};
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typedef BasicStrfnd<char> Strfnd;
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typedef BasicStrfnd<wchar_t> WStrfnd;
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