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Diffstat (limited to 'utils/text/operations.ipp')
-rw-r--r-- | utils/text/operations.ipp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/utils/text/operations.ipp b/utils/text/operations.ipp new file mode 100644 index 000000000000..511cd6840a08 --- /dev/null +++ b/utils/text/operations.ipp @@ -0,0 +1,91 @@ +// Copyright 2012 The Kyua Authors. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution. +// * Neither the name of Google Inc. nor the names of its contributors +// may be used to endorse or promote products derived from this software +// without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#if !defined(UTILS_TEXT_OPERATIONS_IPP) +#define UTILS_TEXT_OPERATIONS_IPP + +#include "utils/text/operations.hpp" + +#include <sstream> + +#include "utils/text/exceptions.hpp" + + +/// Concatenates a collection of strings into a single string. +/// +/// \param strings The collection of strings to concatenate. If the collection +/// is unordered, the ordering in the output is undefined. +/// \param delimiter The delimiter to use to separate the strings. +/// +/// \return The concatenated strings. +template< typename Collection > +std::string +utils::text::join(const Collection& strings, const std::string& delimiter) +{ + std::ostringstream output; + if (strings.size() > 1) { + for (typename Collection::const_iterator iter = strings.begin(); + iter != --strings.end(); ++iter) + output << (*iter) << delimiter; + } + if (strings.size() > 0) + output << *(--strings.end()); + return output.str(); +} + + +/// Converts a string to a native type. +/// +/// \tparam Type The type to convert the string to. An input stream operator +/// must exist to extract such a type from an std::istream. +/// \param str The string to convert. +/// +/// \return The converted string, if the input string was valid. +/// +/// \throw std::value_error If the input string does not represent a valid +/// target type. This exception does not include any details, so the caller +/// must take care to re-raise it with appropriate details. +template< typename Type > +Type +utils::text::to_type(const std::string& str) +{ + if (str.empty()) + throw text::value_error("Empty string"); + if (str[0] == ' ') + throw text::value_error("Invalid value"); + + std::istringstream input(str); + Type value; + input >> value; + if (!input.eof() || input.bad() || input.fail()) + throw text::value_error("Invalid value"); + return value; +} + + +#endif // !defined(UTILS_TEXT_OPERATIONS_IPP) |