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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
namespace stdalgo
{
namespace vector
{
/**
* Erase a single element from a vector by overwriting it with a copy of the last element,
* which is then removed. This, in contrast to vector::erase(), does not result in all
* elements after the erased element being moved.
* @param vect Vector to remove the element from
* @param it Iterator to the element to remove
* @return Nothing, but all iterators, references and pointers to the erased element and the
* last element are invalidated
*/
template <typename T>
inline void swaperase(typename std::vector<T>& vect, const typename std::vector<T>::iterator& it)
{
*it = vect.back();
vect.pop_back();
}
/**
* Find and if exists, erase a single element from a vector by overwriting it with a
* copy of the last element, which is then removed. This, in contrast to vector::erase(),
* does not result in all elements after the erased element being moved.
* If the given value occurs multiple times, the one with the lowest index is removed.
* Individual elements are compared to the given value using operator==().
* @param vect Vector to remove the element from
* @param val Value of the element to look for and remove
* @return True if the element was found and removed, false if it wasn't found.
* If true, all iterators, references and pointers pointing to either the first element that
* is equal to val or to the last element are invalidated.
*/
template <typename T>
inline bool swaperase(typename std::vector<T>& vect, const T& val)
{
const typename std::vector<T>::iterator it = std::find(vect.begin(), vect.end(), val);
if (it != vect.end())
{
swaperase(vect, it);
return true;
}
return false;
}
}
namespace string
{
/** Get underlying C string of the string passed as parameter. Useful in template functions.
* @param str C string
* @return Same as input
*/
inline const char* tocstr(const char* str)
{
return str;
}
/** Get underlying C string of the string passed as parameter. Useful in template functions.
* @param str std::string object
* @return str.c_str()
*/
inline const char* tocstr(const std::string& str)
{
return str.c_str();
}
/** Check if two strings are equal case insensitively.
* @param str1 First string to compare.
* @param str2 Second string to compare.
* @return True if the strings are equal case-insensitively, false otherwise.
*/
template <typename S1, typename S2>
inline bool equalsci(const S1& str1, const S2& str2)
{
return (!strcasecmp(tocstr(str1), tocstr(str2)));
}
/** Joins the contents of a vector to a string.
* @param sequence Zero or more items to join.
* @param separator The character to place between the items, defaults to ' ' (space).
* @return The joined string.
*/
template<typename Collection>
inline std::string join(const Collection& sequence, char separator = ' ')
{
std::string joined;
if (sequence.empty())
return joined;
for (typename Collection::const_iterator iter = sequence.begin(); iter != sequence.end(); ++iter)
joined.append(ConvToStr(*iter)).push_back(separator);
joined.erase(joined.end() - 1);
return joined;
}
/** Replace first occurrence of a substring ('target') in a string ('str') with another string ('replacement').
* @param str String to perform replacement in
* @param target String to replace
* @param replacement String to put in place of 'target'
* @return True if 'target' was replaced with 'replacement', false if it was not found in 'str'.
*/
template<typename CharT, typename Traits, typename Alloc>
inline bool replace(std::basic_string<CharT, Traits, Alloc>& str, const std::basic_string<CharT, Traits, Alloc>& target, const std::basic_string<CharT, Traits, Alloc>& replacement)
{
const typename std::basic_string<CharT, Traits, Alloc>::size_type p = str.find(target);
if (p == std::basic_string<CharT, Traits, Alloc>::npos)
return false;
str.replace(p, target.size(), replacement);
return true;
}
/** Replace all occurrences of a string ('target') in a string ('str') with another string ('replacement').
* @param str String to perform replacement in
* @param target String to replace
* @param replacement String to put in place of 'target'
*/
template<typename CharT, typename Traits, typename Alloc>
inline void replace_all(std::basic_string<CharT, Traits, Alloc>& str, const std::basic_string<CharT, Traits, Alloc>& target, const std::basic_string<CharT, Traits, Alloc>& replacement)
{
if (target.empty())
return;
typename std::basic_string<CharT, Traits, Alloc>::size_type p = 0;
while ((p = str.find(target, p)) != std::basic_string<CharT, Traits, Alloc>::npos)
{
str.replace(p, target.size(), replacement);
p += replacement.size();
}
}
}
/**
* Deleter that uses operator delete to delete the item
*/
template <typename T>
struct defaultdeleter
{
void operator()(T* o)
{
delete o;
}
};
/**
* Deleter that adds the item to the cull list, that is, queues it for
* deletion at the end of the current mainloop iteration
*/
struct culldeleter
{
void operator()(classbase* item);
};
/**
* Deletes all elements in a container using operator delete
* @param cont The container containing the elements to delete
*/
template <template<typename, typename> class Cont, typename T, typename Alloc>
inline void delete_all(const Cont<T*, Alloc>& cont)
{
std::for_each(cont.begin(), cont.end(), defaultdeleter<T>());
}
/**
* Remove an element from a container
* @param cont Container to remove the element from
* @param val Value of the element to look for and remove
* @return True if the element was found and removed, false otherwise
*/
template <template<typename, typename> class Cont, typename T, typename Alloc>
inline bool erase(Cont<T, Alloc>& cont, const T& val)
{
const typename Cont<T, Alloc>::iterator it = std::find(cont.begin(), cont.end(), val);
if (it != cont.end())
{
cont.erase(it);
return true;
}
return false;
}
/**
* Check if an element with the given value is in a container. Equivalent to (std::find(cont.begin(), cont.end(), val) != cont.end()).
* @param cont Container to find the element in
* @param val Value of the element to look for
* @return True if the element was found in the container, false otherwise
*/
template <template<typename, typename> class Cont, typename T, typename Alloc>
inline bool isin(const Cont<T, Alloc>& cont, const T& val)
{
return (std::find(cont.begin(), cont.end(), val) != cont.end());
}
}
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