1// Copyright 2012 The Kyua Authors. 2// All rights reserved. 3// 4// Redistribution and use in source and binary forms, with or without 5// modification, are permitted provided that the following conditions are 6// met: 7// 8// * Redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer. 10// * Redistributions in binary form must reproduce the above copyright 11// notice, this list of conditions and the following disclaimer in the 12// documentation and/or other materials provided with the distribution. 13// * Neither the name of Google Inc. nor the names of its contributors 14// may be used to endorse or promote products derived from this software 15// without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29#if !defined(UTILS_TEXT_OPERATIONS_IPP) 30#define UTILS_TEXT_OPERATIONS_IPP 31 32#include "utils/text/operations.hpp" 33 34#include <sstream> 35 36#include "utils/text/exceptions.hpp" 37 38 39/// Concatenates a collection of strings into a single string. 40/// 41/// \param strings The collection of strings to concatenate. If the collection 42/// is unordered, the ordering in the output is undefined. 43/// \param delimiter The delimiter to use to separate the strings. 44/// 45/// \return The concatenated strings. 46template< typename Collection > 47std::string 48utils::text::join(const Collection& strings, const std::string& delimiter) 49{ 50 std::ostringstream output; 51 if (strings.size() > 1) { 52 for (typename Collection::const_iterator iter = strings.begin(); 53 iter != --strings.end(); ++iter) 54 output << (*iter) << delimiter; 55 } 56 if (strings.size() > 0) 57 output << *(--strings.end()); 58 return output.str(); 59} 60 61 62/// Converts a string to a native type. 63/// 64/// \tparam Type The type to convert the string to. An input stream operator 65/// must exist to extract such a type from an std::istream. 66/// \param str The string to convert. 67/// 68/// \return The converted string, if the input string was valid. 69/// 70/// \throw std::value_error If the input string does not represent a valid 71/// target type. This exception does not include any details, so the caller 72/// must take care to re-raise it with appropriate details. 73template< typename Type > 74Type 75utils::text::to_type(const std::string& str) 76{ 77 if (str.empty()) 78 throw text::value_error("Empty string"); 79 if (str[0] == ' ') 80 throw text::value_error("Invalid value"); 81 82 std::istringstream input(str); 83 Type value; 84 input >> value; 85 if (!input.eof() || input.bad() || input.fail()) 86 throw text::value_error("Invalid value"); 87 return value; 88} 89 90 91#endif // !defined(UTILS_TEXT_OPERATIONS_IPP) 92