Tremulous Forum

Mods => Modding Center => Topic started by: PwNz! on October 17, 2007, 12:46:36 pm

Title: Patches Explained.
Post by: PwNz! on October 17, 2007, 12:46:36 pm

Can someone please explain a patch.
I know - means to remove it and + to add it. But what about @'s and things.

Could someone please explain all the symbols and how they are used, and what happens. With tjw's patch here:

Code: [Select]

Index: src/server/server.h
===================================================================
--- src/server/server.h (revision 823)
+++ src/server/server.h (working copy)
@@ -169,6 +169,7 @@
  netchan_buffer_t **netchan_end_queue;
 
  int oldServerTime;
+ qboolean csupdated[MAX_CONFIGSTRINGS+1];
 } client_t;
 
 //=============================================================================
@@ -227,6 +228,8 @@
 extern cvar_t *sv_rconPassword;
 extern cvar_t *sv_privatePassword;
 extern cvar_t *sv_allowDownload;
+extern cvar_t *sv_wwwDownload;
+extern cvar_t *sv_wwwBaseURL;
 extern cvar_t *sv_maxclients;
 
 extern cvar_t *sv_privateClients;
@@ -272,6 +275,7 @@
 //
 void SV_SetConfigstring( int index, const char *val );
 void SV_GetConfigstring( int index, char *buffer, int bufferSize );
+void SV_UpdateConfigstrings( client_t *client );
 
 void SV_SetUserinfo( int index, const char *val );
 void SV_GetUserinfo( int index, char *buffer, int bufferSize );

Title: Re: Patches Explained.
Post by: next_ghost on October 17, 2007, 03:11:36 pm

Code: [Select]

Index: file to patch
===================================================================
--- old file (revision info)
+++ new file (revision info)
@@ -first line in old file,old hunk size +first line in new file,new hunk size @@
changes
@@ ... @@
another change in the same file
Index: another file to patch
===================================================================
...

Title: Patches Explained.
Post by: PwNz! on October 17, 2007, 09:30:40 pm

Thank you :)

So, would this mean that this line -@@ -169,6 +169,7 @@ , deletes line 169 and replaces it with the patch one.    netchan_buffer_t **netchan_end_queue;
  and the rest? or just that line.
    int            oldServerTime;
+   qboolean         csupdated[MAX_CONFIGSTRINGS+1];    
 } client_t;

Title: Patches Explained.
Post by: Caveman on October 17, 2007, 10:15:57 pm

why not just simply apply the patch and have a look see what happened to the source?

That would be faster than reading the manual / howto or waiting here to get an answer you like.

Title: Patches Explained.
Post by: Plague on October 17, 2007, 10:20:01 pm

Quote from: "Caveman"

why not just simply apply the patch and have a look see what happened to the source?

That would be faster than reading the manual / howto or waiting here to get an answer you like.

Why don't you just load a gun, aim it at your head and fire?

Once again we're blessed with the infallible logic of Caveman.

Title: Patches Explained.
Post by: benmachine on October 17, 2007, 10:59:42 pm

Quote from: "PwNz!"

Thank you :)

So, would this mean that this line -@@ -169,6 +169,7 @@ , deletes line 169 and replaces it with the patch one.    netchan_buffer_t **netchan_end_queue;
  and the rest? or just that line.
    int            oldServerTime;
+   qboolean         csupdated[MAX_CONFIGSTRINGS+1];    
 } client_t;

The patch you showed doesn't delete anything, it simply adds some variables and a function prototype.

Title: Patches Explained.
Post by: PwNz! on October 18, 2007, 02:13:35 am

So whats this mean? @@ -169,6 +169,7 @@

Title: Patches Explained.
Post by: Undeference on October 18, 2007, 07:14:29 am

http://www.wikipedia.org/wiki/diff#Unified_format

Title: Patches Explained.
Post by: benmachine on October 18, 2007, 04:06:28 pm

Quote from: "PwNz!"

So whats this mean? @@ -169,6 +169,7 @@

Where in the original file there were six lines starting at 169, there are now seven.

Title: Patches Explained.
Post by: kangounator on October 18, 2007, 09:08:57 pm

seriously you should not really mind what it exactly it means, you should focus on + and - (the @@ will just help you now where it is in the file)