102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/*
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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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#pragma once
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/** \file
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* \ingroup bli
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct BLI_Buffer {
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void *data;
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const size_t elem_size;
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size_t count, alloc_count;
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int flag;
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} BLI_Buffer;
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enum {
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BLI_BUFFER_NOP = 0,
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BLI_BUFFER_USE_STATIC = (1 << 0),
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};
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#define BLI_buffer_declare_static(type_, name_, flag_, static_count_) \
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char name_##user; /* warn for free only */ \
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type_ name_##_static_[static_count_]; \
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BLI_Buffer name_ = { \
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(name_##_static_), sizeof(type_), 0, static_count_, BLI_BUFFER_USE_STATIC | (flag_)}
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/* never use static*/
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#define BLI_buffer_declare(type_, name_, flag_) \
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bool name_##user; /* warn for free only */ \
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BLI_Buffer name_ = {NULL, sizeof(type_), 0, 0, (flag_)}
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#define BLI_buffer_at(buffer_, type_, index_) \
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((((type_ *)(buffer_) \
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->data)[(BLI_assert(sizeof(type_) == (buffer_)->elem_size)), \
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(BLI_assert((int)(index_) >= 0 && (size_t)(index_) < (buffer_)->count)), \
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index_]))
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#define BLI_buffer_array(buffer_, type_) (&(BLI_buffer_at(buffer_, type_, 0)))
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#define BLI_buffer_resize_data(buffer_, type_, new_count_) \
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((BLI_buffer_resize(buffer_, new_count_), new_count_ ? BLI_buffer_array(buffer_, type_) : NULL))
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#define BLI_buffer_reinit_data(buffer_, type_, new_count_) \
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((BLI_buffer_reinit(buffer_, new_count_), new_count_ ? BLI_buffer_array(buffer_, type_) : NULL))
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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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#define BLI_buffer_clear(buffer_) \
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{ \
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(buffer_)->count = 0; \
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} \
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(void)0
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/* Never decreases the amount of memory allocated */
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void BLI_buffer_resize(BLI_Buffer *buffer, const size_t new_count);
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/* Ensure size, throwing away old data, respecting BLI_BUFFER_USE_CALLOC */
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void BLI_buffer_reinit(BLI_Buffer *buffer, const size_t 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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#define BLI_buffer_free(name_) \
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{ \
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_bli_buffer_free(name_); \
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(void)name_##user; /* ensure we free */ \
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} \
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(void)0
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/* A buffer embedded in a struct. Using memcpy is allowed until first resize. */
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#define BLI_buffer_field_init(name_, type_) \
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{ \
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memset(name_, 0, sizeof(*name_)); \
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*(size_t *)&((name_)->elem_size) = sizeof(type_); \
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} \
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(void)0
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#define BLI_buffer_field_free(name_) _bli_buffer_free(name_)
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#ifdef __cplusplus
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}
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#endif
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