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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) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/**
* \file runtime.c
* \brief This file handles the loading of .blend files embedded in runtimes
* \ingroup blenloader
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#ifdef WIN32
# include <io.h> // read, open
# include "BLI_winstuff.h"
#else // ! WIN32
# include <unistd.h> // read
#endif
#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "BLO_readfile.h"
#include "BLO_runtime.h"
#include "BKE_blender.h"
#include "BKE_report.h"
/* Runtime reading */
static int handle_read_msb_int(int handle)
{
unsigned char buf[4];
if (read(handle, buf, 4) != 4)
return -1;
return (buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + (buf[3] << 0);
}
int BLO_is_a_runtime(const char *path)
{
int res = 0, fd = BLI_open(path, O_BINARY | O_RDONLY, 0);
int datastart;
char buf[8];
if (fd < 0)
goto cleanup;
lseek(fd, -12, SEEK_END);
datastart = handle_read_msb_int(fd);
if (datastart == -1)
goto cleanup;
else if (read(fd, buf, 8) != 8)
goto cleanup;
else if (memcmp(buf, "BRUNTIME", 8) != 0)
goto cleanup;
else
res = 1;
cleanup:
if (fd != -1)
close(fd);
return res;
}
BlendFileData *BLO_read_runtime(const char *path, ReportList *reports)
{
BlendFileData *bfd = NULL;
size_t actualsize;
int fd, datastart;
char buf[8];
fd = BLI_open(path, O_BINARY | O_RDONLY, 0);
if (fd < 0) {
BKE_reportf(reports, RPT_ERROR, "Unable to open '%s': %s", path, strerror(errno));
goto cleanup;
}
actualsize = BLI_file_descriptor_size(fd);
lseek(fd, -12, SEEK_END);
datastart = handle_read_msb_int(fd);
if (datastart == -1) {
BKE_reportf(reports, RPT_ERROR, "Unable to read '%s' (problem seeking)", path);
goto cleanup;
}
else if (read(fd, buf, 8) != 8) {
BKE_reportf(reports, RPT_ERROR, "Unable to read '%s' (truncated header)", path);
goto cleanup;
}
else if (memcmp(buf, "BRUNTIME", 8) != 0) {
BKE_reportf(reports, RPT_ERROR, "Unable to read '%s' (not a blend file)", path);
goto cleanup;
}
else {
//printf("starting to read runtime from %s at datastart %d\n", path, datastart);
lseek(fd, datastart, SEEK_SET);
bfd = blo_read_blendafterruntime(fd, path, actualsize - datastart, reports);
fd = -1; // file was closed in blo_read_blendafterruntime()
}
cleanup:
if (fd != -1)
close(fd);
return bfd;
}
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