143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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/**
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* \file runtime.c
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* \brief This file handles the loading of .blend files embedded in runtimes
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* \ingroup blenloader
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#ifdef WIN32
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# include <io.h> // read, open
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# include "BLI_winstuff.h"
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#else // ! WIN32
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# include <unistd.h> // read
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#endif
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#include "BLI_blenlib.h"
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#include "BLI_utildefines.h"
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#include "BLO_readfile.h"
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#include "BLO_runtime.h"
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#include "BKE_report.h"
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/* Runtime reading */
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static int handle_read_msb_int(int handle)
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{
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unsigned char buf[4];
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if (read(handle, buf, 4) != 4)
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return -1;
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return (buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + (buf[3] << 0);
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}
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int BLO_is_a_runtime(const char *path)
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{
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int res = 0, fd = BLI_open(path, O_BINARY | O_RDONLY, 0);
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int datastart;
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char buf[8];
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if (fd == -1)
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goto cleanup;
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lseek(fd, -12, SEEK_END);
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datastart = handle_read_msb_int(fd);
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if (datastart == -1)
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goto cleanup;
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else if (read(fd, buf, 8) != 8)
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goto cleanup;
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else if (memcmp(buf, "BRUNTIME", 8) != 0)
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goto cleanup;
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else
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res = 1;
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cleanup:
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if (fd != -1)
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close(fd);
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return res;
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}
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BlendFileData *BLO_read_runtime(const char *path, ReportList *reports)
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{
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BlendFileData *bfd = NULL;
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size_t actualsize;
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int fd, datastart;
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char buf[8];
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fd = BLI_open(path, O_BINARY | O_RDONLY, 0);
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if (fd == -1) {
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BKE_reportf(reports, RPT_ERROR, "Unable to open '%s': %s", path, strerror(errno));
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goto cleanup;
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}
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actualsize = BLI_file_descriptor_size(fd);
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lseek(fd, -12, SEEK_END);
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datastart = handle_read_msb_int(fd);
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if (datastart == -1) {
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BKE_reportf(reports, RPT_ERROR, "Unable to read '%s' (problem seeking)", path);
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goto cleanup;
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}
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else if (read(fd, buf, 8) != 8) {
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BKE_reportf(reports, RPT_ERROR, "Unable to read '%s' (truncated header)", path);
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goto cleanup;
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}
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else if (memcmp(buf, "BRUNTIME", 8) != 0) {
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BKE_reportf(reports, RPT_ERROR, "Unable to read '%s' (not a blend file)", path);
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goto cleanup;
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}
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else {
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//printf("starting to read runtime from %s at datastart %d\n", path, datastart);
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lseek(fd, datastart, SEEK_SET);
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bfd = blo_read_blendafterruntime(fd, path, actualsize - datastart, reports);
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fd = -1; // file was closed in blo_read_blendafterruntime()
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}
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cleanup:
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if (fd != -1)
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close(fd);
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return bfd;
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}
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