[glib] Bug 655076 - Our normalization code misses some Full_Composition_Exclusion=True.

[Behdad Esfahbod <behdad src gnome org>]

commit b30ca6e5a57fd40cf8f94ef2869e742498bc0577
Author: Behdad Esfahbod <behdad behdad org>
Date:   Thu Jul 21 16:05:43 2011 -0400

    Bug 655076 - Our normalization code misses some Full_Composition_Exclusion=True.

 glib/gen-unicode-tables.pl |    4 ++++
 glib/tests/unicode.c       |   16 ++++++++++++++++
 2 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/glib/gen-unicode-tables.pl b/glib/gen-unicode-tables.pl
index b419d8b..a8fe7bf 100755
--- a/glib/gen-unicode-tables.pl
+++ b/glib/gen-unicode-tables.pl
@@ -1109,6 +1109,10 @@ sub output_composition_table
 	@values = map { hex ($_) } split /\s+/, $compositions{$code};
 
         # non-starters
+	if ($cclass[$code]) {
+	    delete $compositions{$code};
+	    next;
+	}
 	if ($cclass[$values[0]]) {
 	    delete $compositions{$code};
 	    next;
diff --git a/glib/tests/unicode.c b/glib/tests/unicode.c
index c13937d..00dd0f5 100644
--- a/glib/tests/unicode.c
+++ b/glib/tests/unicode.c
@@ -432,6 +432,10 @@ test_compose (void)
   g_assert (!g_unichar_compose (0x0041, 0, &ch) && ch == 0);
   g_assert (!g_unichar_compose (0x0066, 0x0069, &ch) && ch == 0);
 
+  /* Tricky non-composable */
+  g_assert (!g_unichar_compose (0x0308, 0x0301, &ch) && ch == 0); /* !0x0344 */
+  g_assert (!g_unichar_compose (0x0F71, 0x0F72, &ch) && ch == 0); /* !0x0F73 */
+
   /* Singletons should not compose */
   g_assert (!g_unichar_compose (0x212B, 0, &ch) && ch == 0);
   g_assert (!g_unichar_compose (0x00C5, 0, &ch) && ch == 0);
@@ -466,6 +470,10 @@ test_decompose (void)
   g_assert (g_unichar_decompose (0x212B, &a, &b) && a == 0x00C5 && b == 0);
   g_assert (g_unichar_decompose (0x2126, &a, &b) && a == 0x03A9 && b == 0);
 
+  /* Tricky pairs */
+  g_assert (g_unichar_decompose (0x0344, &a, &b) && a == 0x0308 && b == 0x0301);
+  g_assert (g_unichar_decompose (0x0F73, &a, &b) && a == 0x0F71 && b == 0x0F72);
+
   /* Pairs */
   g_assert (g_unichar_decompose (0x00C5, &a, &b) && a == 0x0041 && b == 0x030A);
   g_assert (g_unichar_decompose (0x00F4, &a, &b) && a == 0x006F && b == 0x0302);
@@ -509,6 +517,10 @@ test_fully_decompose_canonical (void)
   TEST2 (0x212B, 0x0041, 0x030A);
   TEST1 (0x2126, 0x03A9);
 
+  /* Tricky pairs */
+  TEST2 (0x0344, 0x0308, 0x0301);
+  TEST2 (0x0F73, 0x0F71, 0x0F72);
+
   /* General */
   TEST2 (0x00C5, 0x0041, 0x030A);
   TEST2 (0x00F4, 0x006F, 0x0302);
@@ -555,6 +567,10 @@ test_canonical_decomposition (void)
   TEST2 (0x212B, 0x0041, 0x030A);
   TEST1 (0x2126, 0x03A9);
 
+  /* Tricky pairs */
+  TEST2 (0x0344, 0x0308, 0x0301);
+  TEST2 (0x0F73, 0x0F71, 0x0F72);
+
   /* General */
   TEST2 (0x00C5, 0x0041, 0x030A);
   TEST2 (0x00F4, 0x006F, 0x0302);