BMI1 support in EliasFanoCoding

[folly.git] / folly / IPAddressV4.cpp

diff --git a/folly/IPAddressV4.cpp b/folly/IPAddressV4.cpp
index 144e4cce6d006b204ce95d52fddfd14f0682c9e5..d66993c4bde13d359e205881ac3f71e08a44e195 100644 (file)
--- a/folly/IPAddressV4.cpp
+++ b/folly/IPAddressV4.cpp
@@ -28,6 +28,7 @@ using std::string;
 
 namespace folly {
 
+
 // free functions
 size_t hash_value(const IPAddressV4& addr) {
   return addr.hash();
@@ -143,6 +144,11 @@ bool IPAddressV4::inSubnetWithMask(const IPAddressV4& subnet,
   return (mask == subMask);
 }
 
+bool IPAddressV4::isLoopback() const {
+  static IPAddressV4 loopback_addr("127.0.0.0");
+  return inSubnetWithMask(loopback_addr, fetchMask(8));
+}
+
 // public
 bool IPAddressV4::isNonroutable() const {
   auto ip = toLongHBO();