mirror of
https://github.com/matrix-construct/construct
synced 2024-11-17 23:40:57 +01:00
103 lines
2.1 KiB
C++
103 lines
2.1 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.
|
|
|
|
std::string
|
|
ircd::replace(const string_view &s,
|
|
const char &before,
|
|
const string_view &after)
|
|
{
|
|
const uint32_t occurs
|
|
(
|
|
std::count(begin(s), end(s), before)
|
|
);
|
|
|
|
const size_t size
|
|
{
|
|
occurs? s.size() + (occurs * after.size()):
|
|
s.size() - occurs
|
|
};
|
|
|
|
return string(size, [&s, &before, &after]
|
|
(const mutable_buffer &buf)
|
|
{
|
|
char *p{begin(buf)};
|
|
std::for_each(begin(s), end(s), [&before, &after, &p]
|
|
(const char &c)
|
|
{
|
|
if(c == before)
|
|
{
|
|
memcpy(p, after.data(), after.size());
|
|
p += after.size();
|
|
}
|
|
else *p++ = c;
|
|
});
|
|
|
|
return std::distance(begin(buf), p);
|
|
});
|
|
}
|
|
|
|
//
|
|
// gequals
|
|
//
|
|
|
|
bool
|
|
ircd::gequals::operator()(const string_view &a, const string_view &b)
|
|
const
|
|
{
|
|
size_t ap(0), bp(0);
|
|
while(ap < a.size() && bp < b.size())
|
|
{
|
|
const auto ca(tolower(a.at(ap))), cb(tolower(b.at(bp)));
|
|
const auto globa(ca == '*'), globb(cb == '*');
|
|
const auto wilda(ca == '?'), wildb(cb == '?');
|
|
|
|
if(!globa && !globb && !wilda && !wildb && ca != cb)
|
|
return false;
|
|
|
|
if((globa && ap + 1 >= a.size()) || (globb && bp + 1 >= b.size()))
|
|
break;
|
|
|
|
if(globa && cb == tolower(a.at(ap + 1)))
|
|
ap += 2;
|
|
|
|
if(globb && ca == tolower(b.at(bp + 1)))
|
|
bp += 2;
|
|
|
|
if(globa && globb)
|
|
++ap, ++bp;
|
|
|
|
if(!globa)
|
|
++ap;
|
|
|
|
if(!globb)
|
|
++bp;
|
|
}
|
|
|
|
if(ap < a.size() && !b.empty() && b.back() == '*')
|
|
return true;
|
|
|
|
if(bp < b.size() && !a.empty() && a.back() == '*')
|
|
return true;
|
|
|
|
return iequals(a.substr(ap), b.substr(bp));
|
|
}
|
|
|
|
//
|
|
// gmatch
|
|
//
|
|
|
|
bool
|
|
ircd::gmatch::operator()(const string_view &a)
|
|
const
|
|
{
|
|
//TODO: optimize.
|
|
const gequals gequals(expr, a);
|
|
return bool(gequals);
|
|
}
|