From cc1823680e9a51157b3c43676e70d619ea1ccc37 Mon Sep 17 00:00:00 2001
From: George Rhoten <grhoten@users.noreply.github.com>
Date: Fri, 31 Dec 2004 08:29:56 +0000
Subject: [PATCH] ICU-4092 Fix swap function so that it works like the other
 swap functions.

X-SVN-Rev: 17053
---
 icu4c/source/common/rbbidata.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/icu4c/source/common/rbbidata.cpp b/icu4c/source/common/rbbidata.cpp
index aa33c610cab..03553f82bd5 100644
--- a/icu4c/source/common/rbbidata.cpp
+++ b/icu4c/source/common/rbbidata.cpp
@@ -267,6 +267,10 @@ ubrk_swap(const UDataSwapper *ds, const void *inData, int32_t length, void *outD
     if (status == NULL || U_FAILURE(*status)) {
         return 0;
     }
+    if(ds==NULL || inData==NULL || length<-1 || (length>0 && outData==NULL)) {
+        *status=U_ILLEGAL_ARGUMENT_ERROR;
+        return 0;
+    }
 
     //
     //  Check that the data header is for for break data.