tommyarrayblkof.h

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/*
 * Copyright (c) 2013, Andrea Mazzoleni. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __TOMMYARRAYBLKOF_H
#define __TOMMYARRAYBLKOF_H
 
#include "tommytypes.h"
#include "tommyarray.h"
 
#include <assert.h> /* for assert */
 
/******************************************************************************/
/* array */
 
#define TOMMY_ARRAYBLKOF_SIZE (4 * 1024)
 
typedef struct tommy_arrayblkof_struct {
        tommy_array block; 
        tommy_size_t element_size; 
        tommy_size_t count; 
} tommy_arrayblkof;
 
TOMMY_API void tommy_arrayblkof_init(tommy_arrayblkof* array, tommy_size_t element_size);
 
TOMMY_API void tommy_arrayblkof_done(tommy_arrayblkof* array);
 
TOMMY_API void tommy_arrayblkof_grow(tommy_arrayblkof* array, tommy_size_t size);
 
tommy_inline void* tommy_arrayblkof_ref(tommy_arrayblkof* array, tommy_size_t pos)
{
        unsigned char* base;
 
        assert(pos < array->count);
 
        base = tommy_cast(unsigned char*, tommy_array_get(&array->block, pos / TOMMY_ARRAYBLKOF_SIZE));
 
        return base + (pos % TOMMY_ARRAYBLKOF_SIZE) * array->element_size;
}
 
tommy_inline tommy_size_t tommy_arrayblkof_size(tommy_arrayblkof* array)
{
        return array->count;
}
 
TOMMY_API tommy_size_t tommy_arrayblkof_memory_usage(tommy_arrayblkof* array);
 
#endif