Set up the infrastructure for replacing NSMutableDictionary with a proper non-copying map.

redo/reredo/darwin/GNUmakeinc.mk

@@ -13,6 +13,7 @@ osMFILES = \
 	darwin/group.m \
 	darwin/label.m \
 	darwin/main.m \
+	darwin/map.m \
 	darwin/menu.m \
 	darwin/progressbar.m \
 	darwin/radiobuttons.m \

redo/reredo/darwin/map.m

@@ -0,0 +1,28 @@
+// 17 august 2015
+#import "uipriv_darwin.h"
+
+// unfortunately NSMutableDictionary copies its keys, meaning we can't use it for pointers
+// hence, this file
+
+NSMapTable *newMap(void)
+{
+	// TODO NSPointerFunctionsOpaquePersonality?
+	return [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsOpaqueMemory
+		valueOptions:NSPointerFunctionsOpaqueMemory];
+}
+
+void *mapGet(NSMapTable *map, id key)
+{
+	NSValue *v;
+
+	v = (NSValue *) [self->items objectForKey:sender];
+	return [v pointerValue];
+}
+
+void mapSet(NSMapTable *map, id key, void *value)
+{
+	NSValue *v;
+
+	v = [NSValue valueWithPointer:value];
+	[map setObject:v forKey:key];
+}

redo/reredo/darwin/menu.m

@@ -1,6 +1,8 @@
 // 28 april 2015
 #import "uipriv_darwin.h"
 
+// TODO migrate to map.m functions
+
 static NSMutableArray *menus = nil;
 static BOOL menusFinalized = NO;
 
@@ -35,9 +37,7 @@ enum {
 {
 	self = [super init];
 	if (self) {
-		// TODO NSPointerFunctionsOpaquePersonality?
+		self->items = newMap();
-		self->items = [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsOpaqueMemory
-			valueOptions:NSPointerFunctionsOpaqueMemory];
 		self->hasQuit = NO;
 		self->hasPreferences = NO;
 		self->hasAbout = NO;

redo/reredo/darwin/uipriv_darwin.h

@@ -11,7 +11,6 @@
 
 // menu.m
 @interface menuManager : NSObject {
-	// unfortunately NSMutableDictionary copies its keys, meaning we can't use it for pointers
 	NSMapTable *items;
 	BOOL hasQuit;
 	BOOL hasPreferences;
@@ -58,5 +57,10 @@ extern void setHuggingPri(NSView *, NSLayoutPriority, NSLayoutConstraintOrientat
 extern void layoutSingleView(NSView *, NSView *, int);
 extern NSSize fittingAlignmentSize(NSView *);
 
+// map.m
+extern NSMapTable *newMap(void);
+extern void *mapGet(NSMapTable *map, id key);
+extern void mapSet(NSMapTable *map, id key, void *value);
+
 // TODO
 #define PUT_CODE_HERE 0