From 4cffd2e7079d8ad091fe3021caffd2b4ffdabd3b Mon Sep 17 00:00:00 2001
From: jackpoz <giacomopoz@gmail.com>
Date: Sat, 29 Mar 2014 21:07:46 +0100
Subject: Core/Commands: Handle "" as empty string argument

Fixes #11548
---
 src/server/game/Chat/Chat.cpp | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/server/game/Chat/Chat.cpp b/src/server/game/Chat/Chat.cpp
index d90fd6f8443..59ba67f96e9 100644
--- a/src/server/game/Chat/Chat.cpp
+++ b/src/server/game/Chat/Chat.cpp
@@ -1180,10 +1180,32 @@ char* ChatHandler::extractQuotedArg(char* args)
         return strtok(args+1, "\"");
     else
     {
-        char* space = strtok(args, "\"");
-        if (!space)
+        // skip spaces
+        while (*args == ' ')
+        {
+            args += 1;
+            continue;
+        }
+
+        // return NULL if we reached the end of the string
+        if (!*args)
+            return NULL;
+
+        // since we skipped all spaces, we expect another token now
+        if (*args == '"')
+        {
+            // return an empty string if there are 2 "" in a row.
+            // strtok doesn't handle this case
+            if (*(args + 1) == '"')
+            {
+                strtok(args, " ");
+                return "";
+            }
+            else
+                return strtok(args + 1, "\"");
+        }
+        else
             return NULL;
-        return strtok(NULL, "\"");
     }
 }
 
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