From 760f9e6693f6a649278ca2a15cf1f6504bb58068 Mon Sep 17 00:00:00 2001
From: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue, 23 Feb 2021 22:40:03 -0500
Subject: [PATCH] Add a cache for the machine description.

---
 Ample/Ample.h |  3 +++
 Ample/Ample.m | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/Ample/Ample.h b/Ample/Ample.h
index 5551e3c..a3132ae 100644
--- a/Ample/Ample.h
+++ b/Ample/Ample.h
@@ -23,6 +23,9 @@ NSString *MamePath(void);
 NSURL *MameWorkingDirectory(void);
 NSString *MameWorkingDirectoryPath(void);
 
+
+NSDictionary *MameMachine(NSString *machine);
+
 /* NSUserDefaults keys */
 extern NSString *kUseCustomMame;
 extern NSString *kMamePath;
diff --git a/Ample/Ample.m b/Ample/Ample.m
index f4a0ca8..0d76a86 100644
--- a/Ample/Ample.m
+++ b/Ample/Ample.m
@@ -90,6 +90,23 @@ NSString *MameWorkingDirectoryPath(void) {
 }
 
 
+NSDictionary *MameMachine(NSString *machine) {
+    static NSMutableDictionary *cache;
+    
+    if (!cache) cache = [NSMutableDictionary new];
+    NSDictionary *d;
+    
+    if (!machine) return nil;
+    d = [cache objectForKey: machine];
+    if (d) return d;
+
+    NSBundle *bundle = [NSBundle mainBundle];
+    NSURL *url= [bundle URLForResource: machine withExtension: @"plist"];
+    
+    d = [NSDictionary dictionaryWithContentsOfURL: url];
+    if (d) [cache setObject: d forKey: machine];
+    return d;
+}
 
 NSString *kUseCustomMame = @"UseCustomMame";
 NSString *kMamePath = @"MamePath";