replaced calls to deprecated string methods

mailnews/base/util/nsMsgI18N.cpp

@@ -150,13 +150,13 @@ nsresult ConvertToUnicode(const nsString& aCharset,
     return NS_ERROR_NULL_POINTER;
   }
   else if ('\0' == *inCString) {
-    outString.SetString("");
+    outString.Truncate();
     return NS_OK;
   }
   else if (aCharset.IsEmpty() ||
       aCharset.EqualsIgnoreCase("us-ascii") ||
       aCharset.EqualsIgnoreCase("ISO-8859-1")) {
-    outString.SetString(inCString);
+    outString.Assign(inCString);
     return NS_OK;
   }
 
@@ -192,7 +192,7 @@ nsresult ConvertToUnicode(const nsString& aCharset,
       if (unichars != nsnull) {
         // convert to unicode
         res = decoder->Convert(inCString, &srcLen, unichars, &unicharLength);
-        outString.SetString(unichars, unicharLength);
+        outString.Assign(unichars, unicharLength);
         PR_Free(unichars);
       }
       else {
@@ -227,7 +227,7 @@ const nsString& msgCompFileSystemCharset()
 			rv = platformCharset->GetCharset(kPlatformCharsetSel_FileName, aPlatformCharset);
 
 		if (NS_FAILED(rv)) 
-			aPlatformCharset.SetString("ISO-8859-1");
+			aPlatformCharset.Assign("ISO-8859-1");
 	}
 	return aPlatformCharset;
 }
@@ -371,7 +371,7 @@ nsresult nsMsgI18NConvertToEntity(const nsString& inString, nsString* outString)
 {
   nsresult res;
 
-  outString->SetString("");
+  outString->Truncate();
   nsCOMPtr <nsIEntityConverter> entityConv;
   res = nsComponentManager::CreateInstance(kEntityConverterCID, NULL, 
                                            NS_GET_IID(nsIEntityConverter), getter_AddRefs(entityConv));
@@ -379,7 +379,7 @@ nsresult nsMsgI18NConvertToEntity(const nsString& inString, nsString* outString)
     PRUnichar *entities = NULL;
     res = entityConv->ConvertToEntities(inString.GetUnicode(), nsIEntityConverter::html40Latin1, &entities);
     if (NS_SUCCEEDED(res) && (NULL != entities)) {
-      outString->SetString(entities);
+      outString->Assign(entities);
       nsAllocator::Free(entities);
      }
    }

mailnews/compose/src/nsMsgCompUtils.cpp

@@ -1519,7 +1519,7 @@ msg_pick_real_name (nsMsgAttachmentHandler *attachment, const char *charset)
     nsAutoString uStr;
     rv = ConvertToUnicode(msgCompFileSystemCharset(), attachment->m_real_name, uStr);
     if (NS_FAILED(rv)) 
-      uStr.SetString(attachment->m_real_name);
+      uStr.Assign(attachment->m_real_name);
 
     char *utf8Str = uStr.ToNewUTF8String();
 

mailnews/compose/src/nsMsgCompose.cpp

@@ -161,7 +161,7 @@ TranslateLineEndings(nsString &aString)
   if (transBuf)
   {
     DoLineEndingConJobUnicode(transBuf, aString.Length());
-    aString.SetString(transBuf);
+    aString.Assign(transBuf);
     PR_FREEIF(transBuf);
   }
 
@@ -750,7 +750,7 @@ nsMsgCompose::SendMsgEx(MSG_DeliverMode deliverMode,
 			m_compFields->SetSubject(nsCAutoString(subject));
 
 		// Convert body to mail charset not to utf-8 (because we don't manipulate body text)
-		aCharset.SetString(m_compFields->GetCharacterSet());
+		aCharset.Assign(m_compFields->GetCharacterSet());
 		if (NS_SUCCEEDED(ConvertFromUnicode(aCharset, body, &outCString))) 
 		{
 			m_compFields->SetBody(outCString);

mailnews/compose/src/nsSmtpProtocol.cpp

@@ -1637,7 +1637,7 @@ NS_IMETHODIMP nsSmtpProtocol::OnLogonRedirectionReply(const PRUnichar * aHost, u
   m_logonRedirector = nsnull; // we don't care about it anymore
 	
   // remember the logon cookie
-  mLogonCookie.SetString(aCookieData, aCookieSize);
+  mLogonCookie.Assign(aCookieData, aCookieSize);
 
   //currently the server isn't returning a valid auth logon capability
   // this line is just a HACK to force us to use auth login.

mailnews/db/msgdb/src/nsMsgDatabase.cpp

@@ -2487,12 +2487,12 @@ nsresult nsMsgDatabase::RowCellColumnToCharPtr(nsIMdbRow *row, mdb_token columnT
 
 /* static */void nsMsgDatabase::YarnTonsString(struct mdbYarn *yarn, nsString *str)
 {
-	str->SetString((const char *) yarn->mYarn_Buf, yarn->mYarn_Fill);
+	str->Assign((const char *) yarn->mYarn_Buf, yarn->mYarn_Fill);
 }
 
 /* static */void nsMsgDatabase::YarnTonsCString(struct mdbYarn *yarn, nsCString *str)
 {
-	str->SetString((const char *) yarn->mYarn_Buf, yarn->mYarn_Fill);
+	str->Assign((const char *) yarn->mYarn_Buf, yarn->mYarn_Fill);
 }