314 lines
6.2 KiB
C
314 lines
6.2 KiB
C
/* @(#) Function which checks the structures imagein and imageout
|
|
* @(#) It returns a valid value only if ip and op are set properly
|
|
* @(#) Cases of returned integer value
|
|
* @(#)
|
|
* @(#) int im_iocheck(imagein, imageout)
|
|
* @(#) IMAGE *imagein, *imageout;
|
|
* @(#)
|
|
* @(#) Returns -1 on fail
|
|
* @(#)
|
|
*
|
|
* Copyright: Nicos Dessipris
|
|
* Written on: 12/02/1990
|
|
* Modified on :
|
|
* 15/4/93 JC
|
|
* - im_incheck(), im_outcheck() added.
|
|
* - type field now checked.
|
|
* 10/6/93 JC
|
|
* - auto-fallback to old-style input added
|
|
* 6/6/95 JC
|
|
* - revised and improved fallback code
|
|
*/
|
|
|
|
/* @(#) Try to make an IMAGE writeable. im_mmapin files become im_mmapinrw
|
|
* @(#) files, buffers are left alone and output files and partial images
|
|
* @(#) generate an error.
|
|
* @(#)
|
|
* @(#) int im_rwcheck( im )
|
|
* @(#) IMAGE *im;
|
|
* @(#)
|
|
* @(#) Returns non-zero on error.
|
|
* @(#)
|
|
* Copyright: John Cupitt
|
|
* Written on: 17/6/92
|
|
* Updated on:
|
|
* 15/4/93
|
|
* - checks for partial images added
|
|
* - now uses type field
|
|
* 31/8/93 JC
|
|
* - returns ok for IM_MMAPINRW type files now too
|
|
* - returns -1 rather than 1 on error
|
|
* - ANSIfied
|
|
* 1/10/97 JC
|
|
* - moved here, and renamed im_rwcheck()
|
|
* 13/2/01 JC
|
|
* - im_image_sanity() checks added
|
|
*/
|
|
|
|
/*
|
|
|
|
This file is part of VIPS.
|
|
|
|
VIPS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
|
|
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif /*HAVE_CONFIG_H*/
|
|
#include <vips/intl.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif /*HAVE_UNISTD_H*/
|
|
#include <fcntl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#ifdef HAVE_SYS_FILE_H
|
|
#include <sys/file.h>
|
|
#endif /*HAVE_SYS_FILE_H*/
|
|
|
|
#include <vips/vips.h>
|
|
#include <vips/internal.h>
|
|
|
|
#ifdef WITH_DMALLOC
|
|
#include <dmalloc.h>
|
|
#endif /*WITH_DMALLOC*/
|
|
|
|
/* Convert a partial to a setbuf.
|
|
*/
|
|
static int
|
|
convert_ptob( IMAGE *im )
|
|
{
|
|
IMAGE *t1;
|
|
|
|
/* Change to IM_SETBUF. First, make a memory buffer and copy into that.
|
|
*/
|
|
if( !(t1 = im_open( "im_incheck:1", "t" )) )
|
|
return( -1 );
|
|
if( im_copy( im, t1 ) ) {
|
|
im_close( t1 );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Copy new stuff in. We can't im__close( im ) and free stuff, as this
|
|
* would kill of lots of regions and cause dangling pointers
|
|
* elsewhere.
|
|
*/
|
|
im->dtype = IM_SETBUF;
|
|
im->data = t1->data;
|
|
t1->data = NULL;
|
|
|
|
/* Close temp image.
|
|
*/
|
|
if( im_close( t1 ) )
|
|
return( -1 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Convert an openin to a mmapin.
|
|
*/
|
|
static int
|
|
convert_otom( IMAGE *im )
|
|
{
|
|
/* just mmap() the whole thing.
|
|
*/
|
|
if( im_mapfile( im ) )
|
|
return( -1 );
|
|
im->data = im->baseaddr + im->sizeof_header;
|
|
im->dtype = IM_MMAPIN;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Check that an image is readable by old-style VIPS functions.
|
|
*/
|
|
int
|
|
im_incheck( IMAGE *im )
|
|
{
|
|
if( im_image_sanity( im ) )
|
|
return( -1 );
|
|
|
|
#ifdef DEBUG_IO
|
|
printf( "im_incheck: old-style input for %s\n", im->filename );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
switch( im->dtype ) {
|
|
case IM_SETBUF:
|
|
case IM_SETBUF_FOREIGN:
|
|
/* Should have been written to.
|
|
*/
|
|
if( !im->data ) {
|
|
im_errormsg( "im_incheck: no image data" );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
case IM_MMAPIN:
|
|
case IM_MMAPINRW:
|
|
/* Can read from all these, in principle anyway.
|
|
*/
|
|
break;
|
|
|
|
case IM_PARTIAL:
|
|
#ifdef DEBUG_IO
|
|
printf( "im_incheck: converting partial image for old-style input\n" );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
/* Change to a setbuf, so our caller can use it.
|
|
*/
|
|
if( convert_ptob( im ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
case IM_OPENIN:
|
|
#ifdef DEBUG_IO
|
|
printf( "im_incheck: converting openin image for old-style input\n" );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
/* Change to a MMAPIN.
|
|
*/
|
|
if( convert_otom( im ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
case IM_OPENOUT:
|
|
/* Close file down and reopen as im_mmapin.
|
|
*/
|
|
#ifdef DEBUG_IO
|
|
printf( "im_incheck: auto-rewind of %s\n", im->filename );
|
|
#endif/*DEBUG_IO*/
|
|
if( im__close( im ) || im_openin( im ) ) {
|
|
im_errormsg( "im_incheck: auto-rewind for %s failed",
|
|
im->filename );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
im_errormsg( "im_incheck: image not readable" );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Check that an image is writeable.
|
|
*/
|
|
int
|
|
im_outcheck( IMAGE *im )
|
|
{
|
|
#ifdef DEBUG_IO
|
|
printf( "im_outcheck: old-style output for %s\n", im->filename );
|
|
#endif/*DEBUG_IO*/
|
|
|
|
switch( im->dtype ) {
|
|
case IM_PARTIAL:
|
|
/* Make sure nothing is attached.
|
|
*/
|
|
if( im->generate ) {
|
|
im_errormsg( "im_outcheck: image already written" );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Cannot do old-style write to PARTIAL. Turn to SETBUF.
|
|
*/
|
|
im->dtype = IM_SETBUF;
|
|
|
|
/* Fall through to SETBUF case.
|
|
*/
|
|
|
|
case IM_SETBUF:
|
|
/* Check that it has not been im_setupout().
|
|
*/
|
|
if( im->data ) {
|
|
im_errormsg( "im_outcheck: image already written" );
|
|
return( -1 );
|
|
}
|
|
|
|
break;
|
|
|
|
case IM_OPENOUT:
|
|
case IM_SETBUF_FOREIGN:
|
|
/* Can write to this ok.
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
im_errormsg( "im_outcheck: image not writeable" );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Check a pair of fds for IO.
|
|
*/
|
|
int
|
|
im_iocheck( IMAGE *in, IMAGE *out )
|
|
{
|
|
return( im_incheck( in ) || im_outcheck( out ) );
|
|
}
|
|
|
|
int
|
|
im_rwcheck( IMAGE *im )
|
|
{
|
|
/* Do an im_incheck(). This will rewind im_openout() files, and
|
|
* generate im_partial() files.
|
|
*/
|
|
if( im_incheck( im ) ) {
|
|
im_errormsg( "im_rwcheck: unable to rewind file" );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Look at the type.
|
|
*/
|
|
switch( im->dtype ) {
|
|
case IM_SETBUF:
|
|
case IM_SETBUF_FOREIGN:
|
|
case IM_MMAPINRW:
|
|
/* No action necessary.
|
|
*/
|
|
break;
|
|
|
|
case IM_MMAPIN:
|
|
/* Try to remap read-write.
|
|
*/
|
|
if( im_remapfilerw( im ) )
|
|
return( -1 );
|
|
|
|
break;
|
|
|
|
default:
|
|
im_errormsg( "im_rwcheck: bad file type" );
|
|
return( -1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|