Imported existing code

indra/llmessage/message_string_table.cpp

@@ -0,0 +1,97 @@
+/** 
+ * @file message_string_table.cpp
+ * @brief static string table for message template
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llerror.h"
+#include "message.h"
+
+inline U32	message_hash_my_string(const char *str)
+{
+	U32 retval = 0;
+	while (*str++)
+	{
+		retval += *str;
+		retval <<= 1;
+	}
+	return (retval % MESSAGE_NUMBER_OF_HASH_BUCKETS);
+}
+
+
+
+LLMessageStringTable::LLMessageStringTable()
+:	mUsed(0)
+{
+	for (U32 i = 0; i < MESSAGE_NUMBER_OF_HASH_BUCKETS; i++)
+	{
+		mEmpty[i] = TRUE;
+		mString[i][0] = 0;
+	}
+}
+
+
+LLMessageStringTable::~LLMessageStringTable()
+{ }
+
+
+char* LLMessageStringTable::getString(const char *str)
+{
+	U32 hash_value = message_hash_my_string(str);
+	while (!mEmpty[hash_value])
+	{
+		if (!strncmp(str, mString[hash_value], MESSAGE_MAX_STRINGS_LENGTH))
+		{
+			return mString[hash_value];
+		}
+		else
+		{
+			hash_value++;
+			hash_value %= MESSAGE_NUMBER_OF_HASH_BUCKETS;
+		}
+	}
+	// not found, so add!
+	strncpy(mString[hash_value], str, MESSAGE_MAX_STRINGS_LENGTH);	/* Flawfinder: ignore */
+	mString[hash_value][MESSAGE_MAX_STRINGS_LENGTH - 1] = 0;
+	mEmpty[hash_value] = FALSE;
+	mUsed++;
+	if (mUsed >= MESSAGE_NUMBER_OF_HASH_BUCKETS - 1)
+	{
+		U32 i;
+		llinfos << "Dumping string table before crashing on HashTable full!" << llendl;
+		for (i = 0; i < MESSAGE_NUMBER_OF_HASH_BUCKETS; i++)
+		{
+			llinfos << "Entry #" << i << ": " << mString[i] << llendl;
+		}
+	}
+	return mString[hash_value];
+}
+