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Diffstat (limited to 'third-party/tommyds/tommyarrayblkof.h')
-rw-r--r-- | third-party/tommyds/tommyarrayblkof.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/third-party/tommyds/tommyarrayblkof.h b/third-party/tommyds/tommyarrayblkof.h new file mode 100644 index 0000000..fce6840 --- /dev/null +++ b/third-party/tommyds/tommyarrayblkof.h @@ -0,0 +1,114 @@ +/* + * 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. + */ + +/** \file + * Dynamic array based on blocks of fixed size. + * + * This array is able to grow dynamically upon request, without any reallocation. + * + * This is very similar at ::tommy_arrayblk, but it allows to store elements of any + * size and not just pointers. + * + * Note that in this case tommy_arrayblkof_ref() returns a pointer to the element, + * that should be used for getting and setting elements in the array, + * as generic getter and setter are not available. + */ + +#ifndef __TOMMYARRAYBLKOF_H +#define __TOMMYARRAYBLKOF_H + +#include "tommytypes.h" +#include "tommyarray.h" + +#include <assert.h> /* for assert */ + +/******************************************************************************/ +/* array */ + +/** + * Elements for each block. + */ +#define TOMMY_ARRAYBLKOF_SIZE (4 * 1024) + +/** + * Array container type. + * \note Don't use internal fields directly, but access the container only using functions. + */ +typedef struct tommy_arrayblkof_struct { + tommy_array block; /**< Array of blocks. */ + tommy_size_t element_size; /**< Size of the stored element in bytes. */ + tommy_count_t count; /**< Number of initialized elements in the array. */ +} tommy_arrayblkof; + +/** + * Initializes the array. + * \param element_size Size in byte of the element to store in the array. + */ +void tommy_arrayblkof_init(tommy_arrayblkof* array, tommy_size_t element_size); + +/** + * Deinitializes the array. + */ +void tommy_arrayblkof_done(tommy_arrayblkof* array); + +/** + * Grows the size up to the specified value. + * All the new elements in the array are initialized with the 0 value. + */ +void tommy_arrayblkof_grow(tommy_arrayblkof* array, tommy_count_t size); + +/** + * Gets a reference of the element at the specified position. + * You must be sure that space for this position is already + * allocated calling tommy_arrayblkof_grow(). + */ +tommy_inline void* tommy_arrayblkof_ref(tommy_arrayblkof* array, tommy_count_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; +} + +/** + * Gets the initialized size of the array. + */ +tommy_inline tommy_count_t tommy_arrayblkof_size(tommy_arrayblkof* array) +{ + return array->count; +} + +/** + * Gets the size of allocated memory. + */ +tommy_size_t tommy_arrayblkof_memory_usage(tommy_arrayblkof* array); + +#endif + |