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AK: Add IPv4Address::from_string(StringView).

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This attempts to parse an IPv4Address from a string, and gives us an excuse
to try out the new Optional<T> for the return value. :^)
This commit is contained in:
Andreas Kling 2019-07-08 11:38:58 +02:00
parent 7b2a4c02e7
commit dddcedfd11
1 changed files with 28 additions and 0 deletions
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28
AK/IPv4Address.h
View file

@ -2,6 +2,9 @@
#include <AK/AKString.h>
#include <AK/NetworkOrdered.h>
#include <AK/Optional.h>
typedef u32 in_addr_t;
namespace AK {
@ -39,6 +42,31 @@ public:
return String::format("%u.%u.%u.%u", m_data[0], m_data[1], m_data[2], m_data[3]);
}
static Optional<IPv4Address> from_string(const StringView& string)
{
if (string.is_null())
return {};
auto parts = string.split_view('.');
if (parts.size() != 4)
return {};
bool ok;
auto a = parts[0].to_uint(ok);
if (!ok || a > 255)
return {};
auto b = parts[1].to_uint(ok);
if (!ok || b > 255)
return {};
auto c = parts[2].to_uint(ok);
if (!ok || c > 255)
return {};
auto d = parts[3].to_uint(ok);
if (!ok || d > 255)
return {};
return IPv4Address((u8)a, (u8)b, (u8)c, (u8)d);
}
in_addr_t to_in_addr_t() const { return m_data_as_u32; }
bool operator==(const IPv4Address& other) const { return m_data_as_u32 == other.m_data_as_u32; }
bool operator!=(const IPv4Address& other) const { return m_data_as_u32 != other.m_data_as_u32; }