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/**
* @file message_string_table.cpp
* @brief static string table for message template
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#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;
LL_INFOS() << "Dumping string table before crashing on HashTable full!" << LL_ENDL;
for (i = 0; i < MESSAGE_NUMBER_OF_HASH_BUCKETS; i++)
{
LL_INFOS() << "Entry #" << i << ": " << mString[i] << LL_ENDL;
}
}
return mString[hash_value];
}
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