Nicholas Bishop
2c9d22fe31
BLI_buffer is a dynamic homogeneous array similar to BLI_array, but it allocates a structure that can be passed around making it possible to resize the array outside the function it was declared in.
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#include "MEM_guardedalloc.h"
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#include "BLI_buffer.h"
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#include "BLI_utildefines.h"
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#include <string.h>
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void BLI_buffer_resize(BLI_Buffer *buffer, int new_count)
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{
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if (new_count > buffer->alloc_count) {
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if (buffer->using_static) {
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void *orig = buffer->data;
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buffer->data = MEM_callocN(buffer->elem_size * new_count,
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"BLI_Buffer.data");
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memcpy(buffer->data, orig, buffer->elem_size * buffer->count);
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buffer->alloc_count = new_count;
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buffer->using_static = FALSE;
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}
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else {
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if (new_count < buffer->alloc_count * 2)
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buffer->alloc_count *= 2;
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else
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buffer->alloc_count = new_count;
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buffer->data = MEM_reallocN(buffer->data,
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(buffer->elem_size *
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buffer->alloc_count));
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}
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}
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buffer->count = new_count;
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}
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void BLI_buffer_free(BLI_Buffer *buffer)
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{
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if (!buffer->using_static)
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MEM_freeN(buffer->data);
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memset(buffer, 0, sizeof(*buffer));
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}
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