70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
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/*
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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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#ifndef __BLI_BUFFER_H__
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#define __BLI_BUFFER_H__
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/* Note: this more or less fills same purpose as BLI_array, but makes
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* it much easier to resize the array outside of the function it was
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* declared in since */
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/* Usage examples:
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*
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* {
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* BLI_buffer_declare(int, my_int_array, 32);
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*
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* BLI_buffer_append(my_int_array, int, 42);
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* assert(my_int_array.count == 1);
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* assert(BLI_buffer_at(my_int_array, int, 0) == 42);
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*
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* BLI_buffer_free(&my_int_array);
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* }
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*/
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typedef struct {
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void *data;
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const int elem_size;
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int count, alloc_count;
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int using_static;
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} BLI_Buffer;
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#define BLI_buffer_declare(type_, name_, static_count_) \
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type_ *name_ ## _static_[static_count_]; \
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BLI_Buffer name_ = {name_ ## _static_, \
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sizeof(type_), \
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0, \
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static_count_, \
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TRUE}
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#define BLI_buffer_at(buffer_, type_, index_) \
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(((type_*)(buffer_)->data)[index_])
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#define BLI_buffer_append(buffer_, type_, val_) \
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BLI_buffer_resize(buffer_, (buffer_)->count + 1); \
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BLI_buffer_at(buffer_, type_, (buffer_)->count - 1) = val_
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/* Never decreases the amount of memory allocated */
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void BLI_buffer_resize(BLI_Buffer *buffer, int new_count);
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/* Does not free the buffer structure itself */
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void BLI_buffer_free(BLI_Buffer *buffer);
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#endif
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