Optimise the maths for the jsonrpc oversize integer workaround.

data/modules.example.conf

@@ -814,14 +814,14 @@ module
 	 * The maximum number of bits an integer can be have in its native type.
 	 *
 	 * By default Anope will emit integers as their native JSON type. If you are
-	 * using JavaScript (which has 56 bit integers) or another language with
+	 * using JavaScript (which has 53 bit integers) or another language with
 	 * native integer types smaller than 64 bits you may need to limit the size
 	 * of integers emitted by Anope.
 	 *
 	 * If this is enabled a string will be used for values outside of the range
 	 * supported by the native data type.
 	 */
-	#integer_bits = 56
+	#integer_bits = 53
 
 	/* Web service to use. Requires httpd. */
 	server = "httpd/main"

modules/rpc/jsonrpc.cpp

@@ -239,8 +239,7 @@ yyjson_mut_val *JSONRPCServiceInterface::SerializeElement(yyjson_mut_doc *doc, c
 		},
 		[&doc, &elem](int64_t i)
 		{
-			auto bits =	std::floor(std::log2(abs(i))) + 1;
-			if (bits <= integer_bits)
+			if (std::abs(i) < (1LL << integer_bits))
 			{
 				// We can fit this into an integer.
 				elem = yyjson_mut_int(doc, i);
@@ -254,8 +253,7 @@ yyjson_mut_val *JSONRPCServiceInterface::SerializeElement(yyjson_mut_doc *doc, c
 		},
 		[&doc, &elem](uint64_t u)
 		{
-			auto bits =	std::floor(std::log2(u)) + 1;
-			if (bits <= integer_bits)
+			if (u < (1ULL << integer_bits))
 			{
 				// We can fit this into an integer.
 				elem = yyjson_mut_uint(doc, u);