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/* -*- mode: objc; coding: utf-8 -*- */
/* Toilet Lisp, a Common Lisp subset for the Étoilé runtime.
* Copyright (C) 2008 Matthias Andreas Benkard.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#import "MLKForeignProcedure.h"
#import "globals.h"
#import "util.h"
#import <Foundation/NSArray.h>
#import <Foundation/NSEnumerator.h>
#ifdef __OBJC_GC__
#import <Foundation/NSZone.h>
#endif
#ifdef HAVE_FFI_H
#include <ffi.h>
#elif HAVE_FFI_FFI_H
#include <ffi/ffi.h>
#endif
#include <stdlib.h>
#include <alloca.h>
@implementation MLKForeignProcedure
-(id) initWithCode:(void *)code
argumentTypes:(NSArray *)argTypes
returnType:(MLKForeignType)returnType
{
int i;
NSEnumerator *e;
id el;
self = [super init];
_code = code;
_returnType = returnType;
#ifdef __OBJC_GC__
_argumentTypes = NSAllocateCollectable (sizeof (MLKForeignType) * [argTypes count], NSScannedOption);
#else
_argumentTypes = malloc (sizeof (MLKForeignType) * [argTypes count]);
#endif
e = [argTypes objectEnumerator];
i = 0;
while ((el = [e nextObject]))
{
_argumentTypes[i++] = MLKForeignTypeWithTypeDesignator (denullify (el));
}
return self;
}
-(NSArray *) applyToArray:(NSArray *)arguments
{
int argc = [arguments count];
ffi_cif cif;
ffi_type *arg_types[argc];
ffi_type *return_type;
ffi_status status;
void *argv[argc];
ffi_arg return_value;
int i;
for (i = 0; i < argc; i++)
{
arg_types[i] =
MLKFFITypeWithForeignType (_argumentTypes[i]);
argv[i] = alloca (arg_types[i]->size);
MLKSetForeignValueWithLispValue (argv[i],
[arguments objectAtIndex:i],
_argumentTypes[i]);
}
return_type = MLKFFITypeWithForeignType (_returnType);
status = ffi_prep_cif (&cif, FFI_DEFAULT_ABI, argc, return_type, arg_types);
if (status != FFI_OK)
{
[NSException raise:@"MLKInvalidFFITypeException"
format:@"FFI type is invalid (this is probably a bug)."];
}
ffi_call (&cif, FFI_FN (_code), &return_value, (void**)argv);
// FIXME
if (return_type == &ffi_type_void)
return [NSArray array];
else
return [NSArray arrayWithObject:nullify (MLKLispValueWithForeignValue ((id*)&return_value, _returnType))];
}
-(NSString *) description
{
return MLKPrintToString(self);
}
-(NSString *) descriptionForLisp
{
return [NSString stringWithFormat:@"<Foreign procedure %p @%p>", _code, self];
}
-(void) dealloc
{
free (_argumentTypes);
[super dealloc];
}
@end
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