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strings.cpp
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strings.cpp
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// Copyright (c) 2016, Alan Patterson
// All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. 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.
// 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.
#include <cctype>
#include <iostream>
#include "strings.hpp"
namespace {
template <typename Sep>
std::vector<std::string> split_impl(const std::string& str, const Sep& sep) {
std::vector<std::string> result;
std::string::size_type last(0);
auto index = str.find(sep, last);
while (index != std::string::npos) {
// last is start of string without sep, index is end.
result.emplace_back(str.substr(last, index - last));
last = index + strings::sep_size(sep);
index = str.find(sep, last);
}
result.emplace_back(str.substr(last));
return result;
}
}
namespace strings {
std::vector<std::string> split(const std::string& str, const std::string& sep) {
return split_impl(str, sep);
}
std::vector<std::string> split(const std::string& str, const char sep) {
return split_impl(str, sep);
}
std::string ltrim(const std::string& str) {
if (str.empty() || !std::isspace(str.front())) {
return str;
}
auto start = str.find_first_not_of(" \n\t\v\f\r");
return str.substr(start);
}
std::string rtrim(const std::string& str) {
if (str.empty() || !std::isspace(str.back())) {
return str;
}
auto end = str.find_last_not_of(" \n\t\v\f\r");
return str.substr(0, end + 1);
}
std::string trim(const std::string& str) {
if (str.empty() ||
(!std::isspace(str.front()) && !std::isspace(str.back()))) {
return str;
}
auto start = str.find_first_not_of(" \n\t\v\f\r");
auto end = str.find_last_not_of(" \n\t\v\f\r");
return str.substr(start, end - start + 1);
}
}