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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
/** \file
* \ingroup bli
*/
#ifdef __cplusplus
extern "C" {
#endif
typedef struct BLI_Buffer {
void *data;
const size_t elem_size;
size_t count, alloc_count;
int flag;
} BLI_Buffer;
enum {
BLI_BUFFER_NOP = 0,
BLI_BUFFER_USE_STATIC = (1 << 0),
};
#define BLI_buffer_declare_static(type_, name_, flag_, static_count_) \
char name_##user; /* warn for free only */ \
type_ name_##_static_[static_count_]; \
BLI_Buffer name_ = { \
(name_##_static_), sizeof(type_), 0, static_count_, BLI_BUFFER_USE_STATIC | (flag_)}
/* never use static*/
#define BLI_buffer_declare(type_, name_, flag_) \
bool name_##user; /* warn for free only */ \
BLI_Buffer name_ = {NULL, sizeof(type_), 0, 0, (flag_)}
#define BLI_buffer_at(buffer_, type_, index_) \
((((type_ *)(buffer_) \
->data)[(BLI_assert(sizeof(type_) == (buffer_)->elem_size)), \
(BLI_assert((int)(index_) >= 0 && (size_t)(index_) < (buffer_)->count)), \
index_]))
#define BLI_buffer_array(buffer_, type_) (&(BLI_buffer_at(buffer_, type_, 0)))
#define BLI_buffer_resize_data(buffer_, type_, new_count_) \
((BLI_buffer_resize(buffer_, new_count_), new_count_ ? BLI_buffer_array(buffer_, type_) : NULL))
#define BLI_buffer_reinit_data(buffer_, type_, new_count_) \
((BLI_buffer_reinit(buffer_, new_count_), new_count_ ? BLI_buffer_array(buffer_, type_) : NULL))
#define BLI_buffer_append(buffer_, type_, val_) \
(BLI_buffer_resize(buffer_, (buffer_)->count + 1), \
(BLI_buffer_at(buffer_, type_, (buffer_)->count - 1) = val_))
#define BLI_buffer_clear(buffer_) \
{ \
(buffer_)->count = 0; \
} \
(void)0
/* Never decreases the amount of memory allocated */
void BLI_buffer_resize(BLI_Buffer *buffer, const size_t new_count);
/* Ensure size, throwing away old data, respecting BLI_BUFFER_USE_CALLOC */
void BLI_buffer_reinit(BLI_Buffer *buffer, const size_t new_count);
/* Does not free the buffer structure itself */
void _bli_buffer_free(BLI_Buffer *buffer);
#define BLI_buffer_free(name_) \
{ \
_bli_buffer_free(name_); \
(void)name_##user; /* ensure we free */ \
} \
(void)0
/* A buffer embedded in a struct. Using memcpy is allowed until first resize. */
#define BLI_buffer_field_init(name_, type_) \
{ \
memset(name_, 0, sizeof(*name_)); \
*(size_t *)&((name_)->elem_size) = sizeof(type_); \
} \
(void)0
#define BLI_buffer_field_free(name_) _bli_buffer_free(name_)
#ifdef __cplusplus
}
#endif
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