ppsspp/ios/main.mm

// main.mm boilerplate

#import <UIKit/UIKit.h>
#import <string>
#import <stdio.h>
#import <stdlib.h>
#import <sys/syscall.h>
#import <AudioToolbox/AudioToolbox.h>

#import "AppDelegate.h"
#import "PPSSPPUIApplication.h"

#include "base/NativeApp.h"
#include "profiler/profiler.h"

@interface UIApplication (Private)
-(void) suspend;
-(void) terminateWithSuccess;
@end

@interface UIApplication (SpringBoardAnimatedExit)
-(void) animatedExit;
@end

@implementation UIApplication (SpringBoardAnimatedExit)
-(void) animatedExit {
	BOOL multitaskingSupported = NO;
	if ([[UIDevice currentDevice] respondsToSelector:@selector(isMultitaskingSupported)]) {
		multitaskingSupported = [UIDevice currentDevice].multitaskingSupported;
	}
	if ([self respondsToSelector:@selector(suspend)]) {
		if (multitaskingSupported) {
			[self beginBackgroundTaskWithExpirationHandler:^{}];
			[self performSelector:@selector(exit) withObject:nil afterDelay:0.4];
		}
		[self suspend];
	} else {
		[self exit];
	}
}

-(void) exit {
	if ([self respondsToSelector:@selector(terminateWithSuccess)]) {
		[self terminateWithSuccess];
	} else {
		exit(0);
	}
}
@end

std::string System_GetProperty(SystemProperty prop) {
	switch (prop) {
	case SYSPROP_NAME:
		return "iOS:";
	case SYSPROP_LANGREGION:
		return "en_US";
	default:
		return "";
	}
}

int System_GetPropertyInt(SystemProperty prop) {
	switch (prop) {
	case SYSPROP_AUDIO_SAMPLE_RATE:
		return 44100;
	case SYSPROP_DISPLAY_REFRESH_RATE:
		return 60000;
	case SYSPROP_DEVICE_TYPE:
		return DEVICE_TYPE_MOBILE;
	default:
		return -1;
	}
}

bool System_GetPropertyBool(SystemProperty prop) {
	switch (prop) {
	case SYSPROP_HAS_BACK_BUTTON:
		return false;
	case SYSPROP_APP_GOLD:
#ifdef GOLD
		return true;
#else
		return false;
#endif
	default:
		return false;
	}
}

void System_SendMessage(const char *command, const char *parameter) {
	if (!strcmp(command, "finish")) {
		[[UIApplication sharedApplication] animatedExit];
	}
}

void System_AskForPermission(SystemPermission permission) {}
PermissionStatus System_GetPermissionStatus(SystemPermission permission) { return PERMISSION_STATUS_GRANTED; }

FOUNDATION_EXTERN void AudioServicesPlaySystemSoundWithVibration(unsigned long, objc_object*, NSDictionary*);

BOOL SupportsTaptic()
{
    // we're on an iOS version that cannot instantiate UISelectionFeedbackGenerator, so no.
    if(!NSClassFromString(@"UISelectionFeedbackGenerator"))
    {
        return NO;
    }
    
    // http://www.mikitamanko.com/blog/2017/01/29/haptic-feedback-with-uifeedbackgenerator/
    // use private API against UIDevice to determine the haptic stepping
    // 2 - iPhone 7 or above, full taptic feedback
    // 1 - iPhone 6S, limited taptic feedback
    // 0 - iPhone 6 or below, no taptic feedback
    NSNumber* val = (NSNumber*)[[UIDevice currentDevice] valueForKey:@"feedbackSupportLevel"];
    return [val intValue] >= 2;
}

void Vibrate(int mode) {
    
    if(SupportsTaptic())
    {
        PPSSPPUIApplication* app = (PPSSPPUIApplication*)[UIApplication sharedApplication];
        if(app.feedbackGenerator == nil)
        {
            app.feedbackGenerator = [[UISelectionFeedbackGenerator alloc] init];
            [app.feedbackGenerator prepare];
        }
        [app.feedbackGenerator selectionChanged];
    }
    else
    {
        NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
        NSArray *pattern = @[@YES, @30, @NO, @2];
        
        dictionary[@"VibePattern"] = pattern;
        dictionary[@"Intensity"] = @2;
        
        AudioServicesPlaySystemSoundWithVibration(kSystemSoundID_Vibrate, nil, dictionary);
    }
}

int main(int argc, char *argv[])
{
	// Simulates a debugger. Makes it possible to use JIT (though only W^X)
	syscall(SYS_ptrace, 0 /*PTRACE_TRACEME*/, 0, 0, 0);
	
	PROFILE_INIT();
	
	@autoreleasepool {
		NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
		NSString *bundlePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/assets/"];
		
		NativeInit(argc, (const char**)argv, documentsPath.UTF8String, bundlePath.UTF8String, NULL);
		
		return UIApplicationMain(argc, argv, NSStringFromClass([PPSSPPUIApplication class]), NSStringFromClass([AppDelegate class]));
	}
}