26ef1f56c8
base/str.cc:
base/str.hh:
Add a couple functions that allow you to split a string at
the first or last instance of a delimiter.
--HG--
extra : convert_revision : 2af22639e1b67ac61577c00475a555841a56f902
141 lines
3.9 KiB
C++
141 lines
3.9 KiB
C++
/*
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* Copyright (c) 2001-2004 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __STR_HH__
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#define __STR_HH__
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#include <sstream>
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#include <string>
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#include <vector>
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#include <ctype.h>
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template<class> class Hash;
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template<>
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class Hash<std::string> {
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public:
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unsigned operator()(const std::string &s) {
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std::string::const_iterator i = s.begin();
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std::string::const_iterator end = s.end();
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unsigned hash = 5381;
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while (i < end)
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hash = ((hash << 5) + hash) + *i++;
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return hash;
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}
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};
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inline void
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eat_lead_white(std::string &s)
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{
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std::string::size_type off = s.find_first_not_of(' ');
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if (off != std::string::npos) {
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std::string::iterator begin = s.begin();
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s.erase(begin, begin + off);
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}
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}
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inline void
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eat_end_white(std::string &s)
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{
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std::string::size_type off = s.find_last_not_of(' ');
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if (off != std::string::npos)
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s.erase(s.begin() + off + 1, s.end());
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}
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inline void
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eat_white(std::string &s)
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{
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eat_lead_white(s);
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eat_end_white(s);
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}
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inline std::string
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to_lower(const std::string &s)
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{
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std::string lower;
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int len = s.size();
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lower.reserve(len);
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for (int i = 0; i < len; ++i)
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lower.push_back(tolower(s[i]));
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return lower;
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}
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// Split the string s into lhs and rhs on the first occurence of the
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// character c.
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bool
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split_first(const std::string &s, std::string &lhs, std::string &rhs, char c);
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// Split the string s into lhs and rhs on the last occurence of the
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// character c.
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bool
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split_last(const std::string &s, std::string &lhs, std::string &rhs, char c);
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// Tokenize the string <s> splitting on the character <token>, and
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// place the result in the string vector <vector>. If <ign> is true,
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// then empty result strings (due to trailing tokens, or consecutive
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// tokens) are skipped.
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void
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tokenize(std::vector<std::string> &vector, const std::string &s,
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char token, bool ign = true);
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template <class T> bool
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to_number(const std::string &value, T &retval);
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template <class T>
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inline std::string
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to_string(const T &value)
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{
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std::stringstream str;
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str << value;
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return str.str();
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}
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// Put quotes around string arg if it contains spaces.
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inline std::string
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quote(const std::string &s)
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{
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std::string ret;
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bool quote = s.find(' ') != std::string::npos;
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if (quote)
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ret = '"';
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ret += s;
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if (quote)
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ret += '"';
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return ret;
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}
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#endif //__STR_HH__
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