From b94307583b2e52ab593051c7ef850af9f3b257c4 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Sun, 17 Nov 2024 13:28:41 -0500
Subject: [PATCH] LibCrypto: Add user-defined literals to convert numbers to a
 BigInt

It is much more convenient to define constants with:

    1000_bigint

Than with:

    Crypto::UnsignedBigInteger { 1000 }
---
 .../LibCrypto/BigInt/UnsignedBigInteger.h     | 22 +++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/Libraries/LibCrypto/BigInt/UnsignedBigInteger.h b/Libraries/LibCrypto/BigInt/UnsignedBigInteger.h
index bf606d8fc95..adac4695c2b 100644
--- a/Libraries/LibCrypto/BigInt/UnsignedBigInteger.h
+++ b/Libraries/LibCrypto/BigInt/UnsignedBigInteger.h
@@ -172,8 +172,26 @@ struct AK::Formatter<Crypto::UnsignedBigInteger> : Formatter<StringView> {
     ErrorOr<void> format(FormatBuilder&, Crypto::UnsignedBigInteger const&);
 };
 
-inline Crypto::UnsignedBigInteger
-operator""_bigint(char const* string, size_t length)
+inline Crypto::UnsignedBigInteger operator""_bigint(char const* string, size_t length)
 {
     return MUST(Crypto::UnsignedBigInteger::from_base(10, { string, length }));
 }
+
+inline Crypto::UnsignedBigInteger operator""_bigint(unsigned long long value)
+{
+    auto result = Crypto::UnsignedBigInteger { static_cast<u64>(value) };
+    VERIFY(!result.is_invalid());
+
+    return result;
+}
+
+inline Crypto::UnsignedBigInteger operator""_bigint(long double value)
+{
+    VERIFY(value >= 0);
+    VERIFY(value < static_cast<long double>(NumericLimits<double>::max()));
+
+    auto result = Crypto::UnsignedBigInteger { static_cast<double>(value) };
+    VERIFY(!result.is_invalid());
+
+    return result;
+}