From 72f5b680f23e8dde26e0795af868f53fda2a1d2d Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Fri, 19 May 2017 14:12:04 -0400
Subject: [PATCH] Filled in darwin/opentype.m.

---
 darwin/CMakeLists.txt |  1 +
 darwin/opentype.m     | 58 ++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 53 insertions(+), 6 deletions(-)

diff --git a/darwin/CMakeLists.txt b/darwin/CMakeLists.txt
index 96db9c09..e260f266 100644
--- a/darwin/CMakeLists.txt
+++ b/darwin/CMakeLists.txt
@@ -31,6 +31,7 @@ list(APPEND _LIBUI_SOURCES
 	darwin/map.m
 	darwin/menu.m
 	darwin/multilineentry.m
+	darwin/opentype.m
 	darwin/progressbar.m
 	darwin/radiobuttons.m
 	darwin/scrollview.m
diff --git a/darwin/opentype.m b/darwin/opentype.m
index 4273b80f..c8158356 100644
--- a/darwin/opentype.m
+++ b/darwin/opentype.m
@@ -1,8 +1,8 @@
 // 11 may 2017
-#include "uipriv_windows.hpp"
+#import "uipriv_darwin.h"
 
 struct uiOpenTypeFeatures {
-	xxxx;
+	NSMutableDictionary *tags;
 };
 
 uiOpenTypeFeatures *uiNewOpenTypeFeatures(void)
@@ -10,13 +10,13 @@ uiOpenTypeFeatures *uiNewOpenTypeFeatures(void)
 	uiOpenTypeFeatures *otf;
 
 	otf = uiNew(uiOpenTypeFeatures);
-	xxxx;
+	otf->tags = [NSMutableDictionary new];
 	return otf;
 }
 
 void uiFreeOpenTypeFeatures(uiOpenTypeFeatures *otf)
 {
-	xxxxxx;
+	[otf->tags release];
 	uiFree(otf);
 }
 
@@ -25,28 +25,74 @@ uiOpenTypeFeatures *uiOpenTypeFeaturesClone(uiOpenTypeFeatures *otf)
 	uiOpenTypeFeatures *out;
 
 	out = uiNew(uiOpenTypeFeatures);
-	xxxxxx;
+	out->tags = [otf->tags mutableCopy];
 	return out;
 }
 
+// TODO provide to aat.m too; remove x8tox32() when doing so
+#define x8to32(x) ((uint32_t) (((uint8_t) (x)) & 0xFF))
+#define mkTag(a, b, c, d)		\
+	((x8tox32(a) << 24) |	\
+	(x8tox32(b) << 16) |		\
+	(x8tox32(c) << 8) |		\
+	x8tox32(d))
+
+// why are there no NSNumber methods for stdint.h or the equivalent core foundation types?...
+#define mkMapObject(tag) [NSNumber numberWithUnsignedLongLong:((unsigned long long) tag)]
+#define mapObjectValue(num) ((uint32_t) [num unsignedLongLongValue])
+
 void uiOpenTypeFeaturesAdd(uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t value)
 {
+	NSNumber *tn, *vn;
+
+	tn = mkMapObject(mkTag(a, b, c, d));
+	vn = mkMapObject(value);
+	[otf->tags setObject:vn forKey:tn];
 }
 
 void uiOpenTypeFeaturesRemove(uiOpenTypeFeatures *otf, char a, char b, char c, char d)
 {
+	NSNumber *tn;
+
+	tn = mkMapObject(mkTag(a, b, c, d));
+	[otf->tags removeObjectForKey:tn];
 }
 
 int uiOpenTypeFeaturesGet(uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t *value)
 {
+	NSNumber *tn, *vn;
+
+	tn = mkMapObject(mkTag(a, b, c, d));
+	vn = (NSNumber *) [otf->tags objectForKey:tn];
+	if (vn == nil)
+		return 0;
+	*value = mapObjectValue(vn);
+	// TODO release vn?
+	return 1;
 }
 
 void uiOpenTypeFeaturesForEach(uiOpenTypeFeatures *otf, uiOpenTypeFeaturesForEachFunc f, void *data)
 {
+	[otf->tags enumerateKeysAndObjectsUsingBlock:^(id key, id value, BOOL *stop) {
+		NSNumber *tn = (NSNumber *) key;
+		NSNumber *vn = (NSNumber *) value;
+		uint32_t tag;
+		uint8_t a, b, c, d;
+
+		tag = mapObjectValue(tn);
+		a = (uint8_t) ((tag >> 24) & 0xFF);
+		b = (uint8_t) ((tag >> 16) & 0xFF);
+		c = (uint8_t) ((tag >> 8) & 0xFF);
+		d = (uint8_t) (tag & 0xFF);
+		// TODO handle return value
+		(*f)((char) a, (char) b, (char) c, (char) d,
+			mapObjectValue(vn), data);
+	}];
 }
 
 int uiOpenTypeFeaturesEqual(uiOpenTypeFeatures *a, uiOpenTypeFeatures *b)
 {
+	return [a->tags isEqualToDictionary:b->tags];
 }
 
-// TODO put the internal function to produce a backend object from one here
+// actual conversion to a feature dictionary is handled in aat.m; see there for details