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check args more carefully 

check input and output args have been supplied in different places ...
so ins can be all checked before outputs are made
This commit is contained in:
John Cupitt 2011-08-28 13:29:53 +01:00
parent ac3ce8b010
commit 1a38d60efb
3 changed files with 26 additions and 17 deletions
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9
TODO
View File

@ -1,12 +1,3 @@
- oops
$ vips avg
Segmentation fault
because we don't test that all args have been set until the end of build,
and statistic_build assumes that in has been set
- is our C API too awkward? we'll need

32
libvips/iofuncs/object.c
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@ -132,6 +132,7 @@ vips_object_check_required( VipsObject *object, GParamSpec *pspec,
void *a, void *b )
{
int *result = (int *) a;
VipsArgumentFlags *iomask = (VipsArgumentFlags *) b;
VIPS_DEBUG_MSG( "vips_object_check_required: %s\n",
g_param_spec_get_name( pspec ) );
@ -139,11 +140,16 @@ vips_object_check_required( VipsObject *object, GParamSpec *pspec,
argument_class->flags & VIPS_ARGUMENT_REQUIRED );
VIPS_DEBUG_MSG( "\tconstruct: %d\n",
argument_class->flags & VIPS_ARGUMENT_CONSTRUCT );
VIPS_DEBUG_MSG( "\tinput: %d\n",
argument_class->flags & VIPS_ARGUMENT_INPUT );
VIPS_DEBUG_MSG( "\toutput: %d\n",
argument_class->flags & VIPS_ARGUMENT_OUTPUT );
VIPS_DEBUG_MSG( "\tassigned: %d\n",
argument_instance->assigned );
if( (argument_class->flags & VIPS_ARGUMENT_REQUIRED) &&
(argument_class->flags & VIPS_ARGUMENT_CONSTRUCT) &&
(argument_class->flags & *iomask) &&
!argument_instance->assigned ) {
vips_error( "VipsObject",
/* used as eg. "parameter out to VipsAdd not set".
@ -162,6 +168,11 @@ vips_object_build( VipsObject *object )
{
VipsObjectClass *object_class = VIPS_OBJECT_GET_CLASS( object );
/* Input and output args must both be set.
*/
VipsArgumentFlags iomask =
VIPS_ARGUMENT_INPUT | VIPS_ARGUMENT_OUTPUT;
int result;
#ifdef DEBUG
@ -178,7 +189,7 @@ vips_object_build( VipsObject *object )
*/
result = 0;
(void) vips_argument_map( object,
vips_object_check_required, &result, NULL );
vips_object_check_required, &result, &iomask );
/* ... more checks go here.
*/
@ -893,6 +904,13 @@ vips_object_real_build( VipsObject *object )
{
VipsObjectClass *object_class = VIPS_OBJECT_GET_CLASS( object );
/* Only test input args, output ones can be set by our subclasses as
* they build. See vips_object_build() above.
*/
VipsArgumentFlags iomask = VIPS_ARGUMENT_INPUT;
int result;
#ifdef DEBUG
printf( "vips_object_real_build: " );
vips_object_print_name( object );
@ -909,14 +927,14 @@ vips_object_real_build( VipsObject *object )
"nickname", object_class->nickname,
"description", object_class->description, NULL );
/* We can't check that all required args have been set here, since our
* superclasses' build funcs might want to set some one the way out,
* see VipsAvg, for example.
*
* Do these checks in the build dispatch function, see above.
/* Check all required input arguments have been supplied, don't stop
* on 1st error.
*/
result = 0;
(void) vips_argument_map( object,
vips_object_check_required, &result, &iomask );
return( 0 );
return( result );
}
static void

2
libvips/iofuncs/operation.c
View File

@ -28,8 +28,8 @@
*/
/*
*/
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>