90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*
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* Copyright (C) 2006-2007 Taybin Rutkin <taybin@taybin.com>
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* Copyright (C) 2007-2015 Paul Davis <paul@linuxaudiosystems.com>
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*
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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 General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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 General Public License for more details.
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*
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* You should have received a copy of the GNU 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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#ifndef PBD_TOKENIZER
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#define PBD_TOKENIZER
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#include <iterator>
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#include <string>
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#include "pbd/libpbd_visibility.h"
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#include "pbd/whitespace.h"
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namespace PBD {
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/**
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Tokenize string, this should work for standard
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strings as well as Glib::ustring. This is a bit of a hack,
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there are much better string tokenizing patterns out there.
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If strip_whitespace is set to true, tokens will be checked to see
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that they still have a length after stripping. If no length, they
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are discarded.
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*/
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template<typename StringType, typename Iter>
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/*LIBPBD_API*/ unsigned int
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tokenize(const StringType& str,
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const StringType& delims,
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Iter it,
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bool strip_whitespace=false)
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{
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typename StringType::size_type start_pos = 0;
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typename StringType::size_type end_pos = 0;
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unsigned int token_count = 0;
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do {
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start_pos = str.find_first_not_of(delims, start_pos);
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end_pos = str.find_first_of(delims, start_pos);
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if (start_pos != end_pos) {
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if (end_pos == str.npos) {
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end_pos = str.length();
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}
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if (strip_whitespace) {
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StringType stripped = str.substr(start_pos, end_pos - start_pos);
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strip_whitespace_edges (stripped);
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if (stripped.length()) {
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*it++ = stripped;
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}
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} else {
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*it++ = str.substr(start_pos, end_pos - start_pos);
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}
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++token_count;
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start_pos = str.find_first_not_of(delims, end_pos + 1);
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}
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} while (start_pos != str.npos);
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if (start_pos != str.npos) {
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if (strip_whitespace) {
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StringType stripped = str.substr(start_pos, str.length() - start_pos);
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strip_whitespace_edges (stripped);
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if (stripped.length()) {
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*it++ = stripped;
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}
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} else {
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*it++ = str.substr(start_pos, str.length() - start_pos);
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}
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++token_count;
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}
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return token_count;
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}
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} // namespace PBD
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#endif // PBD_TOKENIZER
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