Add support for loadable vkeyboard layouts

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9347 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 101 insertions, 0 deletions

diff --git a/firmware/hangul.c b/firmware/hangul.c
new file mode 100644
index 0000000000..27123ccb64
--- /dev/null
+++ b/firmware/hangul.c
@@ -0,0 +1,101 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ *
+ * Copyright (C) 2006 by Frank Dischner
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "hangul.h"
+
+const char jamo_table[51][3] = {
+    { 1,  0,  1},
+    { 2,  0,  2},
+    { 0,  0,  3},
+    { 3,  0,  4},
+    { 0,  0,  5},
+    { 0,  0,  6},
+    { 4,  0,  7},
+    { 5,  0,  0},
+    { 6,  0,  8},
+    { 0,  0,  9},
+    { 0,  0, 10},
+    { 0,  0, 11},
+    { 0,  0, 12},
+    { 0,  0, 13},
+    { 0,  0, 14},
+    { 0,  0, 15},
+    { 7,  0, 16},
+    { 8,  0, 17},
+    { 9,  0,  0},
+    { 0,  0, 18},
+    {10,  0, 19},
+    {11,  0, 20},
+    {12,  0, 21},
+    {13,  0, 22},
+    {14,  0,  0},
+    {15,  0, 23},
+    {16,  0, 24},
+    {17,  0, 25},
+    {18,  0, 26},
+    {19,  0, 27},
+    { 0,  1,  0},
+    { 0,  2,  0},
+    { 0,  3,  0},
+    { 0,  4,  0},
+    { 0,  5,  0},
+    { 0,  6,  0},
+    { 0,  7,  0},
+    { 0,  8,  0},
+    { 0,  9,  0},
+    { 0, 10,  0},
+    { 0, 11,  0},
+    { 0, 12,  0},
+    { 0, 13,  0},
+    { 0, 14,  0},
+    { 0, 15,  0},
+    { 0, 16,  0},
+    { 0, 17,  0},
+    { 0, 18,  0},
+    { 0, 19,  0},
+    { 0, 20,  0},
+    { 0, 21,  0},
+};
+
+/* takes three jamo chars and joins them into one hangul */
+unsigned short hangul_join(unsigned short lead, unsigned short vowel,
+                                unsigned short tail)
+{
+    unsigned short ch = 0xfffd;
+
+    if (lead < 0x3131 || lead > 0x3163)
+        return ch;
+    lead = jamo_table[lead-0x3131][0];
+
+    if (vowel < 0x3131 || vowel > 0x3163)
+        return ch;
+    vowel = jamo_table[vowel-0x3131][1];
+
+    if (tail) {
+        if (tail < 0x3131 || tail > 0x3163)
+            return ch;
+        tail = jamo_table[tail-0x3131][2];
+        if (!tail)
+            return ch;
+    }
+
+    if (lead && vowel)
+        ch = tail + (vowel - 1)*28 + (lead - 1)*588 + 44032;
+
+    return ch;
+}