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/*
* 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) 2004-2021 Blender Foundation
* All rights reserved.
*/
/** \file
* \ingroup bli
*/
#ifndef WIN32
# include <unistd.h> /* for read close */
#else
# include "BLI_winstuff.h"
# include "winsock2.h"
# include <io.h> /* for open close read */
#endif
#include "BLI_blenlib.h"
#include "BLI_filereader.h"
#include "MEM_guardedalloc.h"
typedef struct {
FileReader reader;
int filedes;
} RawFileReader;
static ssize_t file_read(FileReader *reader, void *buffer, size_t size)
{
RawFileReader *rawfile = (RawFileReader *)reader;
ssize_t readsize = read(rawfile->filedes, buffer, size);
if (readsize >= 0) {
rawfile->reader.offset += readsize;
}
return readsize;
}
static off64_t file_seek(FileReader *reader, off64_t offset, int whence)
{
RawFileReader *rawfile = (RawFileReader *)reader;
rawfile->reader.offset = BLI_lseek(rawfile->filedes, offset, whence);
return rawfile->reader.offset;
}
static void file_close(FileReader *reader)
{
RawFileReader *rawfile = (RawFileReader *)reader;
close(rawfile->filedes);
MEM_freeN(rawfile);
}
FileReader *BLI_filereader_new_file(int filedes)
{
RawFileReader *rawfile = MEM_callocN(sizeof(RawFileReader), __func__);
rawfile->filedes = filedes;
rawfile->reader.read = file_read;
rawfile->reader.seek = file_seek;
rawfile->reader.close = file_close;
return (FileReader *)rawfile;
}
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