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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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) 2004 Blender Foundation
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
* .blend file reading entry point
*/
/** \file blender/blenloader/intern/undofile.c
* \ingroup blenloader
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include "MEM_guardedalloc.h"
#include "DNA_listBase.h"
#include "BLI_blenlib.h"
#include "BLO_undofile.h"
/* **************** support for memory-write, for undo buffers *************** */
/* not memfile itself */
void BLO_memfile_free(MemFile *memfile)
{
MemFileChunk *chunk;
while ((chunk = BLI_pophead(&memfile->chunks))) {
if (chunk->ident == 0)
MEM_freeN(chunk->buf);
MEM_freeN(chunk);
}
memfile->size = 0;
}
/* to keep list of memfiles consistent, 'first' is always first in list */
/* result is that 'first' is being freed */
void BLO_memfile_merge(MemFile *first, MemFile *second)
{
MemFileChunk *fc, *sc;
fc = first->chunks.first;
sc = second->chunks.first;
while (fc || sc) {
if (fc && sc) {
if (sc->ident) {
sc->ident = 0;
fc->ident = 1;
}
}
if (fc) fc = fc->next;
if (sc) sc = sc->next;
}
BLO_memfile_free(first);
}
static int my_memcmp(const int *mem1, const int *mem2, const int len)
{
register int a = len;
register const int *mema = mem1;
register const int *memb = mem2;
while (a--) {
if (*mema != *memb) return 1;
mema++;
memb++;
}
return 0;
}
void memfile_chunk_add(MemFile *compare, MemFile *current, const char *buf, unsigned int size)
{
static MemFileChunk *compchunk = NULL;
MemFileChunk *curchunk;
/* this function inits when compare != NULL or when current == NULL */
if (compare) {
compchunk = compare->chunks.first;
return;
}
if (current == NULL) {
compchunk = NULL;
return;
}
curchunk = MEM_mallocN(sizeof(MemFileChunk), "MemFileChunk");
curchunk->size = size;
curchunk->buf = NULL;
curchunk->ident = 0;
BLI_addtail(¤t->chunks, curchunk);
/* we compare compchunk with buf */
if (compchunk) {
if (compchunk->size == curchunk->size) {
if (my_memcmp((int *)compchunk->buf, (const int *)buf, size / 4) == 0) {
curchunk->buf = compchunk->buf;
curchunk->ident = 1;
}
}
compchunk = compchunk->next;
}
/* not equal... */
if (curchunk->buf == NULL) {
curchunk->buf = MEM_mallocN(size, "Chunk buffer");
memcpy(curchunk->buf, buf, size);
current->size += size;
}
}
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