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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/* $Rev$ $Date$ */
+
+#ifndef tuscany_slist_hpp
+#define tuscany_slist_hpp
+
+/**
+ * Useful functions to work with lists of strings and character streams.
+ */
+
+#include <iostream>
+#include <string>
+#include "function.hpp"
+#include "list.hpp"
+
+namespace tuscany {
+
+/**
+ * Tokenize a string into a list of strings.
+ */
+const list<std::string> tokenize(const std::string& sep, const std::string& str) {
+ struct nested {
+ static const list<std::string> tokenize(const std::string& sep, const std::string& str, const unsigned int start = 0) {
+ if (start >= str.length())
+ return list<std::string>();
+ const unsigned int i = str.find_first_of(sep, start);
+ if (i == std::string::npos)
+ return makeList(str.substr(start));
+ return cons(str.substr(start, i - start), tokenize(sep, str, i + 1));
+ }
+ };
+ return nested::tokenize(sep, str, 0);
+}
+
+/**
+ * Returns a lazy list view of an input stream.
+ */
+struct ilistRead{
+ std::istream &is;
+ ilistRead(std::istream& is) : is(is) {
+ }
+ const list<std::string> operator()() {
+ char buffer[1024];
+ is.read(buffer, 1024);
+ const int n = is.gcount();
+ if (n ==0)
+ return list<std::string>();
+ return cons(std::string(buffer, n), (*this)());
+ }
+};
+
+const list<std::string> makeStreamList(std::istream& is) {
+ return ilistRead(is)();
+}
+
+/**
+ * Fragment the first element of a list of strings to fit the given max length.
+ */
+const list<std::string> fragment(list<std::string> l, unsigned int max) {
+ const std::string s = car(l);
+ if (s.length() <= max)
+ return l;
+ return cons(s.substr(0, max), cons(s.substr(max), cdr(l)));
+}
+
+/**
+ * Write a list of strings to an output stream.
+ */
+std::ostream& write(const list<std::string>& l, std::ostream& os) {
+ if(isNil(l))
+ return os;
+ os << car(l);
+ return write(cdr(l), os);
+}
+
+}
+
+#endif /* tuscany_slist_hpp */