framework/randomshaders/rsgNameAllocator.cpp

/*-------------------------------------------------------------------------
 * drawElements Quality Program Random Shader Generator
 * ----------------------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Name Allocator.
 *//*--------------------------------------------------------------------*/

#include "rsgNameAllocator.hpp"

namespace rsg
{

NameAllocator::NameAllocator (void)
	: m_nextName(1)
{
}

NameAllocator::~NameAllocator (void)
{
}

inline std::string nameNdxToStr (deUint32 name)
{
	std::string	str			= "";
	deUint32	alphabetLen	= 'z' - 'a' + 1;

	while (name > alphabetLen)
	{
		str.insert(str.begin(), (char)('a' + ((name-1)%alphabetLen)));
		name = ((name-1) / alphabetLen);
	}

	str.insert(str.begin(), (char)('a' + (name%(alphabetLen+1)) - 1));

	return str;
}

std::string NameAllocator::allocate (void)
{
	DE_ASSERT(m_nextName != 0);
	return nameNdxToStr(m_nextName++);
}

} // rsg