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/*
Copyright (C) 2000-2007 Paul Davis
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef PBD_TOKENIZER
#define PBD_TOKENIZER
#include <iterator>
#include <string>
#include "pbd/libpbd_visibility.h"
#include "pbd/whitespace.h"
namespace PBD {
/**
Tokenize string, this should work for standard
strings as well as Glib::ustring. This is a bit of a hack,
there are much better string tokenizing patterns out there.
If strip_whitespace is set to true, tokens will be checked to see
that they still have a length after stripping. If no length, they
are discarded.
*/
template<typename StringType, typename Iter>
/*LIBPBD_API*/ unsigned int
tokenize(const StringType& str,
const StringType& delims,
Iter it,
bool strip_whitespace=false)
{
typename StringType::size_type start_pos = 0;
typename StringType::size_type end_pos = 0;
unsigned int token_count = 0;
do {
start_pos = str.find_first_not_of(delims, start_pos);
end_pos = str.find_first_of(delims, start_pos);
if (start_pos != end_pos) {
if (end_pos == str.npos) {
end_pos = str.length();
}
if (strip_whitespace) {
StringType stripped = str.substr(start_pos, end_pos - start_pos);
strip_whitespace_edges (stripped);
if (stripped.length()) {
*it++ = stripped;
}
} else {
*it++ = str.substr(start_pos, end_pos - start_pos);
}
++token_count;
start_pos = str.find_first_not_of(delims, end_pos + 1);
}
} while (start_pos != str.npos);
if (start_pos != str.npos) {
if (strip_whitespace) {
StringType stripped = str.substr(start_pos, str.length() - start_pos);
strip_whitespace_edges (stripped);
if (stripped.length()) {
*it++ = stripped;
}
} else {
*it++ = str.substr(start_pos, str.length() - start_pos);
}
++token_count;
}
return token_count;
}
} // namespace PBD
#endif // PBD_TOKENIZER
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