From 49fe5c1e5a329d033e55ce87ceff7fae1bf28f4b Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Tue, 15 Nov 2022 15:37:23 -0700
Subject: [PATCH] [glib] Remove old cruft from pre-2011

---
 src/hb-glib.cc | 77 +++-----------------------------------------------
 1 file changed, 4 insertions(+), 73 deletions(-)

diff --git a/src/hb-glib.cc b/src/hb-glib.cc
index 8ddc7ebad..1da81696e 100644
--- a/src/hb-glib.cc
+++ b/src/hb-glib.cc
@@ -129,32 +129,9 @@ hb_glib_unicode_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 {
 #if GLIB_CHECK_VERSION(2,29,12)
   return g_unichar_compose (a, b, ab);
+#else
+  return false;
 #endif
-
-  /* We don't ifdef-out the fallback code such that compiler always
-   * sees it and makes sure it's compilable. */
-
-  gchar utf8[12];
-  gchar *normalized;
-  int len;
-  hb_bool_t ret;
-
-  len = g_unichar_to_utf8 (a, utf8);
-  len += g_unichar_to_utf8 (b, utf8 + len);
-  normalized = g_utf8_normalize (utf8, len, G_NORMALIZE_NFC);
-  len = g_utf8_strlen (normalized, -1);
-  if (unlikely (!len))
-    return false;
-
-  if (len == 1) {
-    *ab = g_utf8_get_char (normalized);
-    ret = true;
-  } else {
-    ret = false;
-  }
-
-  g_free (normalized);
-  return ret;
 }
 
 static hb_bool_t
@@ -166,55 +143,9 @@ hb_glib_unicode_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 {
 #if GLIB_CHECK_VERSION(2,29,12)
   return g_unichar_decompose (ab, a, b);
+#else
+  return false;
 #endif
-
-  /* We don't ifdef-out the fallback code such that compiler always
-   * sees it and makes sure it's compilable. */
-
-  gchar utf8[6];
-  gchar *normalized;
-  int len;
-  hb_bool_t ret;
-
-  len = g_unichar_to_utf8 (ab, utf8);
-  normalized = g_utf8_normalize (utf8, len, G_NORMALIZE_NFD);
-  len = g_utf8_strlen (normalized, -1);
-  if (unlikely (!len))
-    return false;
-
-  if (len == 1) {
-    *a = g_utf8_get_char (normalized);
-    *b = 0;
-    ret = *a != ab;
-  } else if (len == 2) {
-    *a = g_utf8_get_char (normalized);
-    *b = g_utf8_get_char (g_utf8_next_char (normalized));
-    /* Here's the ugly part: if ab decomposes to a single character and
-     * that character decomposes again, we have to detect that and undo
-     * the second part :-(. */
-    gchar *recomposed = g_utf8_normalize (normalized, -1, G_NORMALIZE_NFC);
-    hb_codepoint_t c = g_utf8_get_char (recomposed);
-    if (c != ab && c != *a) {
-      *a = c;
-      *b = 0;
-    }
-    g_free (recomposed);
-    ret = true;
-  } else {
-    /* If decomposed to more than two characters, take the last one,
-     * and recompose the rest to get the first component. */
-    gchar *end = g_utf8_offset_to_pointer (normalized, len - 1);
-    gchar *recomposed;
-    *b = g_utf8_get_char (end);
-    recomposed = g_utf8_normalize (normalized, end - normalized, G_NORMALIZE_NFC);
-    /* We expect that recomposed has exactly one character now. */
-    *a = g_utf8_get_char (recomposed);
-    g_free (recomposed);
-    ret = true;
-  }
-
-  g_free (normalized);
-  return ret;
 }