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ircd:Ⓜ️🆔 Add id part-swapping interface.

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This commit is contained in:
Jason Volk 2019-03-30 16:35:05 -07:00
parent 276ba9941d
commit d17ac6a8bb
2 changed files with 48 additions and 0 deletions
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6
include/ircd/m/id.h
View file

@ -74,6 +74,12 @@ struct ircd::m::id
uint16_t port() const; // Just the port number or 0 if none
bool literal() const; // Whether the hostname() is IP literal
// Rewrites the ID so the local and host parts are swapped; for indexing.
// e.g. `$foo:bar.com` becomes `bar.com$foo`; unswap() reverses to normal.
static id unswap(const string_view &, const mutable_buffer &);
static string_view swap(const id &, const mutable_buffer &);
string_view swap(const mutable_buffer &) const;
IRCD_USING_OVERLOAD(generate, m::generate);
id(const enum sigil &, const mutable_buffer &, const generate_t &, const string_view &host);

42
ircd/m_id.cc
View file

@ -456,6 +456,48 @@ ircd::m::id::id(const enum sigil &sigil,
{
}
ircd::string_view
ircd::m::id::swap(const mutable_buffer &buf)
const
{
return swap(*this, buf);
}
ircd::string_view
ircd::m::id::swap(const id &id,
const mutable_buffer &buf_)
{
using buffer::consume;
using buffer::copy;
using buffer::data;
mutable_buffer buf(buf_);
consume(buf, copy(buf, id.host()));
consume(buf, copy(buf, id.local()));
return { data(buf_), data(buf) };
}
ircd::m::id
ircd::m::id::unswap(const string_view &str,
const mutable_buffer &buf)
{
size_t i(0);
for(; i < str.size(); ++i)
if(is_sigil(str[i]))
break;
if(unlikely(!i || i >= str.size()))
throw m::INVALID_MXID
{
"Failed to reconstruct any MXID out of '%s'", str
};
return id
{
sigil(str[i]), buf, str.substr(i), str.substr(0, i)
};
}
bool
ircd::m::id::literal()
const