diff --git a/unix/OLD_opentype.c b/unix/OLD_opentype.c
deleted file mode 100644
index 30933ea8..00000000
--- a/unix/OLD_opentype.c
+++ /dev/null
@@ -1,208 +0,0 @@
-// 11 may 2017
-#include "uipriv_unix.h"
-
-// TODO switch from GINT_TO_POINTER() and so to a fake GUINT_TO_POINTER()?
-
-struct uiOpenTypeFeatures {
-	GHashTable *tags;
-};
-
-uiOpenTypeFeatures *uiNewOpenTypeFeatures(void)
-{
-	uiOpenTypeFeatures *otf;
-
-	otf = uiNew(uiOpenTypeFeatures);
-	otf->tags = g_hash_table_new(g_direct_hash, g_direct_equal);
-	return otf;
-}
-
-void uiFreeOpenTypeFeatures(uiOpenTypeFeatures *otf)
-{
-	g_hash_table_destroy(otf->tags);
-	uiFree(otf);
-}
-
-static void cloneTags(gpointer key, gpointer value, gpointer data)
-{
-	// TODO is there a G_HASH_TABLE()?
-	g_hash_table_replace((GHashTable *) data, key, value);
-}
-
-uiOpenTypeFeatures *uiOpenTypeFeaturesClone(const uiOpenTypeFeatures *otf)
-{
-	uiOpenTypeFeatures *out;
-
-	// TODO switch the windows one to use this
-	out = uiNewOpenTypeFeatures();
-	g_hash_table_foreach(otf->tags, cloneTags, out->tags);
-	return out;
-}
-
-static gpointer mkTag(char a, char b, char c, char d)
-{
-	uint32_t tag;
-
-	tag = (((uint32_t) a) & 0xFF) << 24;
-	tag |= (((uint32_t) b) & 0xFF) << 16;
-	tag |= (((uint32_t) c) & 0xFF) << 8;
-	tag |= ((uint32_t) d) & 0xFF;
-	return GINT_TO_POINTER(tag);
-}
-
-void uiOpenTypeFeaturesAdd(uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t value)
-{
-	g_hash_table_replace(otf->tags, mkTag(a, b, c, d), GINT_TO_POINTER(value));
-}
-
-void uiOpenTypeFeaturesRemove(uiOpenTypeFeatures *otf, char a, char b, char c, char d)
-{
-	// will just return FALSE if the tag is not in otf->tags (half-documented as such), so we can use it safely
-	g_hash_table_remove(otf->tags, mkTag(a, b, c, d));
-}
-
-// TODO will the const wreck stuff up?
-int uiOpenTypeFeaturesGet(const uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t *value)
-{
-	gboolean found;
-	gpointer gv;
-
-	found = g_hash_table_lookup_extended(otf->tags,
-		mkTag(a, b, c, d),
-		NULL, &gv);
-	if (!found)
-		return 0;
-	*value = GPOINTER_TO_INT(gv);
-	return 1;
-}
-
-struct otfForEach {
-	const uiOpenTypeFeatures *otf;
-	uiOpenTypeFeaturesForEachFunc f;
-	void *data;
-	uiForEach ret;
-};
-
-static void foreach(gpointer key, gpointer value, gpointer data)
-{
-	struct otfForEach *ofe = (struct otfForEach *) data;
-	uint32_t tag;
-	uint8_t a, b, c, d;
-
-	// we can't stop early, so just ignore the rest if we have to
-	if (ofe->ret == uiForEachStop)
-		return;
-	tag = GPOINTER_TO_INT(key);
-	a = (uint8_t) ((tag >> 24) & 0xFF);
-	b = (uint8_t) ((tag >> 16) & 0xFF);
-	c = (uint8_t) ((tag >> 8) & 0xFF);
-	d = (uint8_t) (tag & 0xFF);
-	ofe->ret = (*(ofe->f))(ofe->otf, (char) a, (char) b, (char) c, (char) d, GPOINTER_TO_INT(value), ofe->data);
-}
-
-void uiOpenTypeFeaturesForEach(const uiOpenTypeFeatures *otf, uiOpenTypeFeaturesForEachFunc f, void *data)
-{
-	struct otfForEach ofe;
-
-	memset(&ofe, 0, sizeof (struct otfForEach));
-	ofe.otf = otf;
-	ofe.f = f;
-	ofe.data = data;
-	g_hash_table_foreach(otf->tags, foreach, &ofe);
-}
-
-static gint tagcmp(gconstpointer a, gconstpointer b)
-{
-	return GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b);
-}
-
-static GList *copySortedKeys(GHashTable *tags)
-{
-	GList *k, *copy;
-
-	k = g_hash_table_get_keys(tags);
-	copy = g_list_copy(k);
-	copy = g_list_sort(copy, tagcmp);
-	// TODO do we free k? the docs contradict themselves
-	// TODO I already forgot, does g_list_sort() copy, or just change the head?
-	return copy;
-}
-
-int uiOpenTypeFeaturesEqual(const uiOpenTypeFeatures *a, const uiOpenTypeFeatures *b)
-{
-	GList *ak, *bk;
-	GList *ai, *bi;
-	guint na, nb;
-	guint i;
-	int equal = 0;
-
-	if (a == NULL && b == NULL)
-		return 1;
-	if (a == NULL || b == NULL)
-		return 0;
-
-	ak = copySortedKeys(a->tags);
-	bk = copySortedKeys(b->tags);
-
-	na = g_list_length(ak);
-	nb = g_list_length(bk);
-	if (na != nb) {
-		equal = 0;
-		goto out;
-	}
-
-	// TODO use GPOINTER_TO_INT() in these?
-	ai = ak;
-	bi = bk;
-	for (i = 0; i < na; i++) {
-		gpointer av, bv;
-
-		// compare keys
-		// this is why we needed to sort earlier
-		if (ai->data != bi->data) {
-			equal = 0;
-			goto out;
-		}
-		// and compare values
-		av = g_hash_table_lookup(a->tags, ai->data);
-		bv = g_hash_table_lookup(b->tags, bi->data);
-		if (av != bv) {
-			equal = 0;
-			goto out;
-		}
-		ai = ai->next;
-		bi = bi->next;
-	}
-
-	// all good
-	equal = 1;
-
-out:
-	g_list_free(bk);
-	g_list_free(ak);
-	return equal;
-}
-
-// see https://developer.mozilla.org/en/docs/Web/CSS/font-feature-settings
-// TODO make this a g_hash_table_foreach() function (which requires duplicating code)?
-static uiForEach toCSS(const uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t value, void *data)
-{
-	// TODO is there a G_STRING()?
-	GString *s = (GString *) data;
-
-	// the last trailing comma is removed after foreach is done
-	g_string_append_printf(s, "\"%c%c%c%c\" %" PRIu32 ", ",
-		a, b, c, d, value);
-	return uiForEachContinue;
-}
-
-gchar *otfToPangoCSSString(const uiOpenTypeFeatures *otf)
-{
-	GString *s;
-
-	s = g_string_new("");
-	uiOpenTypeFeaturesForEach(otf, toCSS, s);
-	if (s->len != 0)
-		// and remove the last comma
-		g_string_truncate(s, s->len - 2);
-	return g_string_free(s, FALSE);
-}
diff --git a/unix/attrstr.h b/unix/attrstr.h
new file mode 100644
index 00000000..3c3e49b3
--- /dev/null
+++ b/unix/attrstr.h
@@ -0,0 +1,4 @@
+// 11 march 2018
+
+// opentype.c
+extern GString *uiprivOpenTypeFeaturesToPangoCSSFeaturesString(const uiOpenTypeFeatures *otf);
diff --git a/unix/OLD_graphemes.c b/unix/graphemes.c
similarity index 92%
rename from unix/OLD_graphemes.c
rename to unix/graphemes.c
index 4f957352..296e655f 100644
--- a/unix/OLD_graphemes.c
+++ b/unix/graphemes.c
@@ -1,12 +1,13 @@
 // 25 may 2016
 #include "uipriv_unix.h"
+#include "attrstr.h"
 
-int graphemesTakesUTF16(void)
+int uiprivGraphemesTakesUTF16(void)
 {
 	return 0;
 }
 
-struct graphemes *graphemes(void *s, size_t len)
+struct graphemes *uiprivNewGraphemes(void *s, size_t len)
 {
 	struct graphemes *g;
 	char *text = (char *) s;
diff --git a/unix/opentype.c b/unix/opentype.c
new file mode 100644
index 00000000..281acda7
--- /dev/null
+++ b/unix/opentype.c
@@ -0,0 +1,26 @@
+// 11 may 2017
+#include "uipriv_unix.h"
+#include "attrstr.h"
+
+// see https://developer.mozilla.org/en/docs/Web/CSS/font-feature-settings
+static uiForEach toCSS(const uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t value, void *data)
+{
+	GString *s = (GString *) data;
+
+	// the last trailing comma is removed after foreach is done
+	g_string_append_printf(s, "\"%c%c%c%c\" %" PRIu32 ", ",
+		a, b, c, d, value);
+	return uiForEachContinue;
+}
+
+GString *uiprivOpenTypeFeaturesToPangoCSSFeaturesString(const uiOpenTypeFeatures *otf)
+{
+	GString *s;
+
+	s = g_string_new("");
+	uiOpenTypeFeaturesForEach(otf, toCSS, s);
+	if (s->len != 0)
+		// and remove the last comma
+		g_string_truncate(s, s->len - 2);
+	return s;
+}