mainapp.m

#import "VnseaApp.h"
#include <objc/objc.h>
#include <objc/objc-runtime.h>
#include <stdio.h>

//thanks to apolloim
double objc_msgSend_fpret(id self, SEL op, ...) {
    Method method = class_getInstanceMethod(self->isa, op);
    int numArgs = method_getNumberOfArguments(method);
    
    if(numArgs == 2) {
        double (*imp)(id, SEL);
        imp = (double (*)(id, SEL))method->method_imp;
        return imp(self, op);
    } else if(numArgs == 3) {
        // FIXME: this code assumes the 3rd arg is 4 bytes
        va_list ap;
        va_start(ap, op);
        double (*imp)(id, SEL, void *);
        imp = (double (*)(id, SEL, void *))method->method_imp;
        return imp(self, op, va_arg(ap, void *));
    }
    
    // FIXME: need to work with multiple arguments/types
    fprintf(stderr, "ERROR: objc_msgSend_fpret, called on <%s %p> with selector %s, had to return 0.0\n", object_getClassName(self), self, sel_getName(op));
    return 0.0;
}

int main(int argc, char **argv)
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    int result = UIApplicationMain(argc, argv, [VnseaApp class]);
	[pool release];
	return result;
}