mirror of
https://github.com/matrix-construct/construct
synced 2024-11-05 05:18:54 +01:00
128 lines
2.6 KiB
C
128 lines
2.6 KiB
C
|
// Matrix Construct
|
||
|
//
|
||
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
||
|
// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
|
||
|
//
|
||
|
// Permission to use, copy, modify, and/or distribute this software for any
|
||
|
// purpose with or without fee is hereby granted, provided that the above
|
||
|
// copyright notice and this permission notice is present in all copies. The
|
||
|
// full license for this software is available in the LICENSE file.
|
||
|
|
||
|
#pragma once
|
||
|
#define HAVE_IRCD_CMP_H
|
||
|
|
||
|
// Simple case insensitive comparison convenience utils
|
||
|
namespace ircd
|
||
|
{
|
||
|
struct iless;
|
||
|
struct igreater;
|
||
|
struct iequals;
|
||
|
}
|
||
|
|
||
|
/// Case insensitive string comparison deciding if two strings are equal
|
||
|
struct ircd::iequals
|
||
|
{
|
||
|
using is_transparent = std::true_type;
|
||
|
|
||
|
bool s;
|
||
|
|
||
|
operator const bool &() const
|
||
|
{
|
||
|
return s;
|
||
|
}
|
||
|
|
||
|
bool operator()(const string_view &a, const string_view &b) const;
|
||
|
|
||
|
template<class A,
|
||
|
class B>
|
||
|
iequals(A&& a, B&& b)
|
||
|
:s{operator()(std::forward<A>(a), std::forward<B>(b))}
|
||
|
{}
|
||
|
|
||
|
iequals() = default;
|
||
|
};
|
||
|
|
||
|
inline bool
|
||
|
ircd::iequals::operator()(const string_view &a,
|
||
|
const string_view &b)
|
||
|
const
|
||
|
{
|
||
|
return std::equal(begin(a), end(a), begin(b), end(b), []
|
||
|
(const char &a, const char &b)
|
||
|
{
|
||
|
return tolower(a) == tolower(b);
|
||
|
});
|
||
|
}
|
||
|
|
||
|
/// Case insensitive string comparison deciding which string compares 'less'
|
||
|
/// than the other.
|
||
|
struct ircd::iless
|
||
|
{
|
||
|
using is_transparent = std::true_type;
|
||
|
|
||
|
bool s;
|
||
|
|
||
|
operator const bool &() const
|
||
|
{
|
||
|
return s;
|
||
|
}
|
||
|
|
||
|
bool operator()(const string_view &a, const string_view &b) const;
|
||
|
|
||
|
template<class A,
|
||
|
class B>
|
||
|
iless(A&& a, B&& b)
|
||
|
:s{operator()(std::forward<A>(a), std::forward<B>(b))}
|
||
|
{}
|
||
|
|
||
|
iless() = default;
|
||
|
};
|
||
|
|
||
|
inline bool
|
||
|
ircd::iless::operator()(const string_view &a,
|
||
|
const string_view &b)
|
||
|
const
|
||
|
{
|
||
|
return std::lexicographical_compare(begin(a), end(a), begin(b), end(b), []
|
||
|
(const char &a, const char &b)
|
||
|
{
|
||
|
return tolower(a) < tolower(b);
|
||
|
});
|
||
|
}
|
||
|
|
||
|
/// Case insensitive string comparison deciding which string compares 'greater'
|
||
|
/// than the other.
|
||
|
struct ircd::igreater
|
||
|
{
|
||
|
using is_transparent = std::true_type;
|
||
|
|
||
|
bool s;
|
||
|
|
||
|
operator const bool &() const
|
||
|
{
|
||
|
return s;
|
||
|
}
|
||
|
|
||
|
bool operator()(const string_view &a, const string_view &b) const;
|
||
|
|
||
|
template<class A,
|
||
|
class B>
|
||
|
igreater(A&& a, B&& b)
|
||
|
:s{operator()(std::forward<A>(a), std::forward<B>(b))}
|
||
|
{}
|
||
|
|
||
|
igreater() = default;
|
||
|
};
|
||
|
|
||
|
inline bool
|
||
|
ircd::igreater::operator()(const string_view &a,
|
||
|
const string_view &b)
|
||
|
const
|
||
|
{
|
||
|
return std::lexicographical_compare(begin(a), end(a), begin(b), end(b), []
|
||
|
(const char &a, const char &b)
|
||
|
{
|
||
|
return tolower(a) > tolower(b);
|
||
|
});
|
||
|
}
|