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-rw-r--r--src/util/strfnd.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/src/util/strfnd.h b/src/util/strfnd.h
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+++ b/src/util/strfnd.h
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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
+