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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2004 Blender Foundation. All rights reserved. */
#pragma once
/** \file
* \ingroup blenloader
* External write-file function prototypes.
*/
#include "BLI_filereader.h"
struct GHash;
struct Scene;
typedef struct {
void *next, *prev;
const char *buf;
/** Size in bytes. */
size_t size;
/** When true, this chunk doesn't own the memory, it's shared with a previous #MemFileChunk */
bool is_identical;
/** When true, this chunk is also identical to the one in the next step (used by undo code to
* detect unchanged IDs).
* Defined when writing the next step (i.e. last undo step has those always false). */
bool is_identical_future;
/** Session UUID of the ID being currently written (MAIN_ID_SESSION_UUID_UNSET when not writing
* ID-related data). Used to find matching chunks in previous memundo step. */
uint id_session_uuid;
} MemFileChunk;
typedef struct MemFile {
ListBase chunks;
size_t size;
} MemFile;
typedef struct MemFileWriteData {
MemFile *written_memfile;
MemFile *reference_memfile;
uint current_id_session_uuid;
MemFileChunk *reference_current_chunk;
/** Maps an ID session uuid to its first reference MemFileChunk, if existing. */
struct GHash *id_session_uuid_mapping;
} MemFileWriteData;
typedef struct MemFileUndoData {
char filepath[1024]; /* FILE_MAX */
MemFile memfile;
size_t undo_size;
} MemFileUndoData;
/* FileReader-compatible wrapper for reading MemFiles */
typedef struct {
FileReader reader;
MemFile *memfile;
int undo_direction;
bool memchunk_identical;
} UndoReader;
#ifdef __cplusplus
extern "C" {
#endif
/* Actually only used `writefile.c`. */
void BLO_memfile_write_init(MemFileWriteData *mem_data,
MemFile *written_memfile,
MemFile *reference_memfile);
void BLO_memfile_write_finalize(MemFileWriteData *mem_data);
void BLO_memfile_chunk_add(MemFileWriteData *mem_data, const char *buf, size_t size);
/* exports */
/**
* Not memfile itself.
*/
/* **************** support for memory-write, for undo buffers *************** */
extern void BLO_memfile_free(MemFile *memfile);
/**
* Result is that 'first' is being freed.
* to keep list of memfiles consistent, 'first' is always first in list.
*/
extern void BLO_memfile_merge(MemFile *first, MemFile *second);
/**
* Clear is_identical_future before adding next memfile.
*/
extern void BLO_memfile_clear_future(MemFile *memfile);
/* Utilities. */
extern struct Main *BLO_memfile_main_get(struct MemFile *memfile,
struct Main *bmain,
struct Scene **r_scene);
/**
* Saves .blend using undo buffer.
*
* \return success.
*/
extern bool BLO_memfile_write_file(struct MemFile *memfile, const char *filepath);
FileReader *BLO_memfile_new_filereader(MemFile *memfile, int undo_direction);
#ifdef __cplusplus
}
#endif
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