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Small optimisation identify_client (#1361) 

small optimisation identify_client
This commit is contained in:
Pavel Pimenov 2016-11-29 09:01:00 +03:00 committed by Arvid Norberg
parent 0f38acf829
commit ee61d5c308
1 changed files with 9 additions and 9 deletions
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18
src/identify_client.cpp
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@ -137,7 +137,7 @@ namespace
// only support BitTorrentSpecification
// must be ordered alphabetically
map_entry name_map[] =
static map_entry name_map[] =
{
{"7T", "aTorrent for android"}
, {"A", "ABC"}
@ -238,12 +238,12 @@ namespace
struct generic_map_entry
{
int offset;
int const offset;
char const* id;
char const* name;
};
// non-standard names
generic_map_entry generic_mappings[] =
static generic_map_entry generic_mappings[] =
{
{0, "Deadman Walking-", "Deadman"}
, {5, "Azureus", "Azureus 2.0.3.2"}
@ -367,7 +367,6 @@ namespace libtorrent
std::string identify_client(peer_id const& p)
{
char const* PID = p.data();
boost::optional<fingerprint> f;
if (p.is_all_zeros()) return "Unknown";
@ -375,7 +374,7 @@ namespace libtorrent
// non standard encodings
// ----------------------
int num_generic_mappings = sizeof(generic_mappings) / sizeof(generic_mappings[0]);
const int num_generic_mappings = sizeof(generic_mappings) / sizeof(generic_mappings[0]);
for (int i = 0; i < num_generic_mappings; ++i)
{
@ -391,15 +390,16 @@ namespace libtorrent
std::string user(PID + 2, PID + 14);
return std::string("eXeem ('") + user.c_str() + "')";
}
bool const is_equ_zero = std::equal(PID, PID + 12, "\0\0\0\0\0\0\0\0\0\0\0\0");
if (std::equal(PID, PID + 13, "\0\0\0\0\0\0\0\0\0\0\0\0\x97"))
if (is_equ_zero && PID[12] == '\x97')
return "Experimental 3.2.1b2";
if (std::equal(PID, PID + 13, "\0\0\0\0\0\0\0\0\0\0\0\0\0"))
if (is_equ_zero && PID[12] == '\0')
return "Experimental 3.1";
// look for azureus style id
f = parse_az_style(p);
boost::optional<fingerprint> f = parse_az_style(p);
if (f) return lookup(*f);
// look for shadow style id
@ -411,7 +411,7 @@ namespace libtorrent
if (f) return lookup(*f);
if (std::equal(PID, PID + 12, "\0\0\0\0\0\0\0\0\0\0\0\0"))
if (is_equ_zero)
return "Generic";
std::string unknown("Unknown [");