blender-archive/source/blender/makesdna/DNA_genfile.h

/*
 * 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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */

/** \file
 * \ingroup DNA
 * \brief blenloader genfile private function prototypes
 */

#ifndef __DNA_GENFILE_H__
#define __DNA_GENFILE_H__

#include "intern/dna_utils.h"

struct SDNA;

/**
 * DNAstr contains the prebuilt SDNA structure defining the layouts of the types
 * used by this version of Blender. It is defined in a file dna.c, which is
 * generated by the makesdna program during the build process (see makesdna.c).
 */
extern const unsigned char DNAstr[];
/** Length of DNAstr. */
extern const int DNAlen;

/**
 * Primitive (non-struct, non-pointer/function/array) types,
 * \warning Don't change these values!
 * Currently changes here here will work on native endianness,
 * however #DNA_struct_switch_endian currently checks these
 * hard-coded values against those from old files.
 */
typedef enum eSDNA_Type {
	SDNA_TYPE_CHAR     = 0,
	SDNA_TYPE_UCHAR    = 1,
	SDNA_TYPE_SHORT    = 2,
	SDNA_TYPE_USHORT   = 3,
	SDNA_TYPE_INT      = 4,
	/* SDNA_TYPE_LONG     = 5, */  /* deprecated (use as int) */
	/* SDNA_TYPE_ULONG    = 6, */  /* deprecated (use as int) */
	SDNA_TYPE_FLOAT    = 7,
	SDNA_TYPE_DOUBLE   = 8,
	/* ,SDNA_TYPE_VOID = 9 */
/* define so switch statements don't complain */
#define SDNA_TYPE_VOID 9
	SDNA_TYPE_INT64    = 10,
	SDNA_TYPE_UINT64   = 11,
} eSDNA_Type;

/**
 * For use with #DNA_struct_reconstruct & #DNA_struct_get_compareflags
 */
enum eSDNA_StructCompare {
	/* Struct has disappeared
	 * (values of this struct type will not be loaded by the current Blender) */
	SDNA_CMP_REMOVED    = 0,
	/* Struct is the same
	 * (can be loaded with straight memory copy after any necessary endian conversion) */
	SDNA_CMP_EQUAL      = 1,
	/* Struct is different in some way
	 * (needs to be copied/converted field by field) */
	SDNA_CMP_NOT_EQUAL  = 2,
};

struct SDNA *DNA_sdna_from_data(
        const void *data, const int data_len,
        bool do_endian_swap, bool data_alloc,
        const char **r_error_message);
void DNA_sdna_free(struct SDNA *sdna);

/* Access for current Blender versions SDNA*/
void               DNA_sdna_current_init(void);
/* borrowed reference */
const struct SDNA *DNA_sdna_current_get(void);
void               DNA_sdna_current_free(void);

int DNA_struct_find_nr_ex(const struct SDNA *sdna, const char *str, unsigned int *index_last);
int DNA_struct_find_nr(const struct SDNA *sdna, const char *str);
void DNA_struct_switch_endian(const struct SDNA *oldsdna, int oldSDNAnr, char *data);
const char *DNA_struct_get_compareflags(const struct SDNA *sdna, const struct SDNA *newsdna);
void *DNA_struct_reconstruct(
        const struct SDNA *newsdna, const struct SDNA *oldsdna,
        const char *compflags, int oldSDNAnr, int blocks, const void *data);

int DNA_elem_offset(struct SDNA *sdna, const char *stype, const char *vartype, const char *name);

bool DNA_struct_find(const struct SDNA *sdna, const char *stype);
bool DNA_struct_elem_find(const struct SDNA *sdna, const char *stype, const char *vartype, const char *name);


int DNA_elem_type_size(const eSDNA_Type elem_nr);

bool DNA_sdna_patch_struct(
        struct SDNA *sdna, const char *struct_name_old, const char *struct_name_new);
bool DNA_sdna_patch_struct_member(
        struct SDNA *sdna, const char *struct_name, const char *elem_old, const char *elem_new);

void DNA_sdna_alias_data_ensure(struct SDNA *sdna);

#endif /* __DNA_GENFILE_H__ */