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/*
* Copyright (c) 2014, Peter Thorson. 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 the WebSocket++ Project 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 PETER THORSON 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.
*
*/
#ifndef WEBSOCKETPP_UTILITIES_HPP
#define WEBSOCKETPP_UTILITIES_HPP
#include <websocketpp/common/stdint.hpp>
#include <algorithm>
#include <string>
#include <locale>
namespace websocketpp {
/// Generic non-websocket specific utility functions and data structures
namespace utility {
/// Helper functor for case insensitive find
/**
* Based on code from
* http://stackoverflow.com/questions/3152241/case-insensitive-stdstring-find
*
* templated version of my_equal so it could work with both char and wchar_t
*/
template<typename charT>
struct my_equal {
/// Construct the functor with the given locale
/**
* @param [in] loc The locale to use for determining the case of values
*/
my_equal(std::locale const & loc ) : m_loc(loc) {}
/// Perform a case insensitive comparison
/**
* @param ch1 The first value to compare
* @param ch2 The second value to compare
* @return Whether or not the two values are equal when both are converted
* to uppercase using the given locale.
*/
bool operator()(charT ch1, charT ch2) {
return std::toupper(ch1, m_loc) == std::toupper(ch2, m_loc);
}
private:
std::locale const & m_loc;
};
/// Helper less than functor for case insensitive find
/**
* Based on code from
* http://stackoverflow.com/questions/3152241/case-insensitive-stdstring-find
*/
struct ci_less : std::binary_function<std::string, std::string, bool> {
// case-independent (ci) compare_less binary function
struct nocase_compare
: public std::binary_function<unsigned char,unsigned char,bool>
{
bool operator() (unsigned char const & c1, unsigned char const & c2) const {
return tolower (c1) < tolower (c2);
}
};
bool operator() (std::string const & s1, std::string const & s2) const {
return std::lexicographical_compare
(s1.begin (), s1.end (), // source range
s2.begin (), s2.end (), // dest range
nocase_compare ()); // comparison
}
};
/// Find substring (case insensitive)
/**
* @param [in] haystack The string to search in
* @param [in] needle The string to search for
* @param [in] loc The locale to use for determining the case of values.
* Defaults to the current locale.
* @return An iterator to the first element of the first occurrance of needle in
* haystack. If the sequence is not found, the function returns
* haystack.end()
*/
template<typename T>
typename T::const_iterator ci_find_substr(T const & haystack, T const & needle,
std::locale const & loc = std::locale())
{
return std::search( haystack.begin(), haystack.end(),
needle.begin(), needle.end(), my_equal<typename T::value_type>(loc) );
}
/// Find substring (case insensitive)
/**
* @todo Is this still used? This method may not make sense.. should use
* iterators or be less generic. As is it is too tightly coupled to std::string
*
* @param [in] haystack The string to search in
* @param [in] needle The string to search for as a char array of values
* @param [in] size Length of needle
* @param [in] loc The locale to use for determining the case of values.
* Defaults to the current locale.
* @return An iterator to the first element of the first occurrance of needle in
* haystack. If the sequence is not found, the function returns
* haystack.end()
*/
template<typename T>
typename T::const_iterator ci_find_substr(T const & haystack,
typename T::value_type const * needle, typename T::size_type size,
std::locale const & loc = std::locale())
{
return std::search( haystack.begin(), haystack.end(),
needle, needle+size, my_equal<typename T::value_type>(loc) );
}
/// Convert a string to lowercase
/**
* @param [in] in The string to convert
* @return The converted string
*/
std::string to_lower(std::string const & in);
/// Replace all occurrances of a substring with another
/**
* @param [in] subject The string to search in
* @param [in] search The string to search for
* @param [in] replace The string to replace with
* @return A copy of `subject` with all occurances of `search` replaced with
* `replace`
*/
std::string string_replace_all(std::string subject, std::string const & search,
std::string const & replace);
/// Convert std::string to ascii printed string of hex digits
/**
* @param [in] input The string to print
* @return A copy of `input` converted to the printable representation of the
* hex values of its data.
*/
std::string to_hex(std::string const & input);
/// Convert byte array (uint8_t) to ascii printed string of hex digits
/**
* @param [in] input The byte array to print
* @param [in] length The length of input
* @return A copy of `input` converted to the printable representation of the
* hex values of its data.
*/
std::string to_hex(uint8_t const * input, size_t length);
/// Convert char array to ascii printed string of hex digits
/**
* @param [in] input The char array to print
* @param [in] length The length of input
* @return A copy of `input` converted to the printable representation of the
* hex values of its data.
*/
std::string to_hex(char const * input, size_t length);
} // namespace utility
} // namespace websocketpp
#include <websocketpp/impl/utilities_impl.hpp>
#endif // WEBSOCKETPP_UTILITIES_HPP
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