Patch For Minor issue | Bitcointalksearch.org

Gavin Andresen

legendary

Activity: 1652

Merit: 2311

Chief Scientist

I agree with jgarzik: the do-nothing << 0 is basically a comment saying "this is a bit-field."

xenon481

sr. member

Activity: 406

Merit: 250

Since it is an enum, there are no significant performance differences.

Additionally, any decent compiler (with optimizations turned on) would optimize both the edited and non-edited lines of code to be the exact same thing since they are all constants.

jgarzik

legendary

Activity: 1596

Merit: 1100

Quote from: phantomcircuit on February 14, 2011, 05:53:15 PM

diff --git a/net.h b/net.h
index f070816..205991f 100644
--- a/net.h
+++ b/net.h
@@ -16,7 +16,7 @@ inline unsigned short GetDefaultPort() { return fTestNet ? htons(18333) : htons(
static const unsigned int PUBLISH_HOPS = 5;
enum
{
- NODE_NETWORK = (1 << 0),
+ NODE_NETWORK = 1,
};

The code is correct as-is. This is the normal way someone defines bitmap constants, and is found throughout the Linux kernel among other places.

In the future, you would probably see

Code:

enum {
     NODE_NETWORK      = (1 << 0),
     NODE_FOO          = (1 << 1),
     NODE_BAR          = (1 << 2),
};

etc.

phantomcircuit

sr. member

Activity: 463

Merit: 252

diff --git a/net.h b/net.h
index f070816..205991f 100644
--- a/net.h
+++ b/net.h
@@ -16,7 +16,7 @@ inline unsigned short GetDefaultPort() { return fTestNet ? htons(18333) : htons(
static const unsigned int PUBLISH_HOPS = 5;
enum
{
- NODE_NETWORK = (1 << 0),
+ NODE_NETWORK = 1,
};

Topic: Patch For Minor issue (Read 1122 times)