159 lines
3 KiB
C
159 lines
3 KiB
C
|
/***************************************************************************
|
||
|
|
|
||
|
|
stream_direct.c
|
||
|
|
|
||
|
|
The direct stream management routines
|
||
|
|
|
||
|
|
(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
|
||
|
|
|
||
|
|
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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
|
||
|
|
***************************************************************************/
|
||
|
|
|
||
|
|
#define __STREAM_IMPL_C
|
||
|
|
|
||
|
|
#include "gb_common.h"
|
||
|
|
#include "gb_error.h"
|
||
|
|
#include "gbx_value.h"
|
||
|
|
#include "gb_limit.h"
|
||
|
|
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sys/mman.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
#include "gbx_stream.h"
|
||
|
|
|
||
|
|
|
||
|
|
#define FD (stream->direct.fd)
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_open(STREAM *stream, const char *path, int mode)
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
struct stat info;
|
||
|
|
int fmode;
|
||
|
|
|
||
|
|
if (mode & ST_CREATE)
|
||
|
|
fmode = O_CREAT | O_TRUNC;
|
||
|
|
else if (mode & ST_APPEND)
|
||
|
|
fmode = O_APPEND | O_CREAT;
|
||
|
|
else
|
||
|
|
fmode = 0;
|
||
|
|
|
||
|
|
switch (mode & ST_MODE)
|
||
|
|
{
|
||
|
|
case ST_READ: fmode |= O_RDONLY; break;
|
||
|
|
case ST_WRITE: fmode |= O_WRONLY; break;
|
||
|
|
case ST_READ_WRITE: fmode |= O_RDWR; break;
|
||
|
|
default: fmode |= O_RDONLY;
|
||
|
|
}
|
||
|
|
|
||
|
|
fd = open(path, fmode, 0666);
|
||
|
|
if (fd < 0)
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
if (fstat(fd, &info) < 0)
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
if (S_ISDIR(info.st_mode))
|
||
|
|
{
|
||
|
|
errno = EISDIR;
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
stream->direct.size = info.st_size;
|
||
|
|
|
||
|
|
FD = fd;
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_close(STREAM *stream)
|
||
|
|
{
|
||
|
|
if (close(FD) < 0)
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
FD = -1;
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_read(STREAM *stream, char *buffer, long len)
|
||
|
|
{
|
||
|
|
return STREAM_read_direct(FD, buffer, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int stream_getchar(STREAM *stream, char *buffer)
|
||
|
|
{
|
||
|
|
return read(FD, buffer, 1) <= 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_write(STREAM *stream, char *buffer, long len)
|
||
|
|
{
|
||
|
|
return STREAM_write_direct(FD, buffer, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_seek(STREAM *stream, long long pos, int whence)
|
||
|
|
{
|
||
|
|
return (lseek(FD, pos, whence) < 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_tell(STREAM *stream, long long *pos)
|
||
|
|
{
|
||
|
|
*pos = lseek(FD, 0, SEEK_CUR);
|
||
|
|
return (*pos < 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_flush(STREAM *stream)
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*static int stream_eof(STREAM *stream)
|
||
|
|
{
|
||
|
|
int ilen;
|
||
|
|
|
||
|
|
if (STREAM_get_readable(FD, &ilen))
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
return (ilen == 0);
|
||
|
|
}*/
|
||
|
|
#define stream_eof NULL
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_lof(STREAM *stream, long long *len)
|
||
|
|
{
|
||
|
|
*len = stream->direct.size;
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int stream_handle(STREAM *stream)
|
||
|
|
{
|
||
|
|
return FD;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
DECLARE_STREAM(STREAM_direct);
|
||
|
|
|