message_string_table.cpp
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上传日期:2021-03-01
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游戏引擎
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- /**
- * @file message_string_table.cpp
- * @brief static string table for message template
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, 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];
- }