firmware/hangul.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  *
   9  *
  10  * Copyright (C) 2006 by Frank Dischner
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #include "hangul.h"
  20
  21 const char jamo_table[51][3] = {
  22     { 1,  0,  1},
  23     { 2,  0,  2},
  24     { 0,  0,  3},
  25     { 3,  0,  4},
  26     { 0,  0,  5},
  27     { 0,  0,  6},
  28     { 4,  0,  7},
  29     { 5,  0,  0},
  30     { 6,  0,  8},
  31     { 0,  0,  9},
  32     { 0,  0, 10},
  33     { 0,  0, 11},
  34     { 0,  0, 12},
  35     { 0,  0, 13},
  36     { 0,  0, 14},
  37     { 0,  0, 15},
  38     { 7,  0, 16},
  39     { 8,  0, 17},
  40     { 9,  0,  0},
  41     { 0,  0, 18},
  42     {10,  0, 19},
  43     {11,  0, 20},
  44     {12,  0, 21},
  45     {13,  0, 22},
  46     {14,  0,  0},
  47     {15,  0, 23},
  48     {16,  0, 24},
  49     {17,  0, 25},
  50     {18,  0, 26},
  51     {19,  0, 27},
  52     { 0,  1,  0},
  53     { 0,  2,  0},
  54     { 0,  3,  0},
  55     { 0,  4,  0},
  56     { 0,  5,  0},
  57     { 0,  6,  0},
  58     { 0,  7,  0},
  59     { 0,  8,  0},
  60     { 0,  9,  0},
  61     { 0, 10,  0},
  62     { 0, 11,  0},
  63     { 0, 12,  0},
  64     { 0, 13,  0},
  65     { 0, 14,  0},
  66     { 0, 15,  0},
  67     { 0, 16,  0},
  68     { 0, 17,  0},
  69     { 0, 18,  0},
  70     { 0, 19,  0},
  71     { 0, 20,  0},
  72     { 0, 21,  0},
  73 };
  74
  75 /* takes three jamo chars and joins them into one hangul */
  76 unsigned short hangul_join(unsigned short lead, unsigned short vowel,
  77                                 unsigned short tail)
  78 {
  79     unsigned short ch = 0xfffd;
  80
  81     if (lead < 0x3131 || lead > 0x3163)
  82         return ch;
  83     lead = jamo_table[lead-0x3131][0];
  84
  85     if (vowel < 0x3131 || vowel > 0x3163)
  86         return ch;
  87     vowel = jamo_table[vowel-0x3131][1];
  88
  89     if (tail) {
  90         if (tail < 0x3131 || tail > 0x3163)
  91             return ch;
  92         tail = jamo_table[tail-0x3131][2];
  93         if (!tail)
  94             return ch;
  95     }
  96
  97     if (lead && vowel)
  98         ch = tail + (vowel - 1)*28 + (lead - 1)*588 + 44032;
  99
 100     return ch;
 101 }