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AK: Create MACAddress from string

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Previously there was no way to create a MACAddress by passing a direct
address as a string. This will allow programs like the arp utility to
create a MACAddress instance by user-passed addresses.
This commit is contained in:
brapru 2021-07-24 20:15:14 -04:00 • committed by Andreas Kling
parent 8313d35749
commit 7e40c17460
2 changed files with 62 additions and 0 deletions
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22
AK/MACAddress.h
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@ -57,6 +57,28 @@ public:
return String::formatted("{:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}", m_data[0], m_data[1], m_data[2], m_data[3], m_data[4], m_data[5]);
}
static Optional<MACAddress> from_string(const StringView& string)
{
if (string.is_null())
return {};
const auto parts = string.split_view(":");
if (parts.size() != 6)
return {};
auto a = AK::StringUtils::convert_to_uint_from_hex(parts[0]).value_or(256);
auto b = AK::StringUtils::convert_to_uint_from_hex(parts[1]).value_or(256);
auto c = AK::StringUtils::convert_to_uint_from_hex(parts[2]).value_or(256);
auto d = AK::StringUtils::convert_to_uint_from_hex(parts[3]).value_or(256);
auto e = AK::StringUtils::convert_to_uint_from_hex(parts[4]).value_or(256);
auto f = AK::StringUtils::convert_to_uint_from_hex(parts[5]).value_or(256);
if (a > 255 || b > 255 || c > 255 || d > 255 || e > 255 || f > 255)
return {};
return MACAddress(a, b, c, d, e, f);
}
constexpr bool is_zero() const
{
return all_of(m_data.begin(), m_data.end(), [](const auto octet) { return octet == 0; });