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  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "hangul.h"
  22
  23 const char jamo_table[51][3] = {
  24     { 1,  0,  1},
  25     { 2,  0,  2},
  26     { 0,  0,  3},
  27     { 3,  0,  4},
  28     { 0,  0,  5},
  29     { 0,  0,  6},
  30     { 4,  0,  7},
  31     { 5,  0,  0},
  32     { 6,  0,  8},
  33     { 0,  0,  9},
  34     { 0,  0, 10},
  35     { 0,  0, 11},
  36     { 0,  0, 12},
  37     { 0,  0, 13},
  38     { 0,  0, 14},
  39     { 0,  0, 15},
  40     { 7,  0, 16},
  41     { 8,  0, 17},
  42     { 9,  0,  0},
  43     { 0,  0, 18},
  44     {10,  0, 19},
  45     {11,  0, 20},
  46     {12,  0, 21},
  47     {13,  0, 22},
  48     {14,  0,  0},
  49     {15,  0, 23},
  50     {16,  0, 24},
  51     {17,  0, 25},
  52     {18,  0, 26},
  53     {19,  0, 27},
  54     { 0,  1,  0},
  55     { 0,  2,  0},
  56     { 0,  3,  0},
  57     { 0,  4,  0},
  58     { 0,  5,  0},
  59     { 0,  6,  0},
  60     { 0,  7,  0},
  61     { 0,  8,  0},
  62     { 0,  9,  0},
  63     { 0, 10,  0},
  64     { 0, 11,  0},
  65     { 0, 12,  0},
  66     { 0, 13,  0},
  67     { 0, 14,  0},
  68     { 0, 15,  0},
  69     { 0, 16,  0},
  70     { 0, 17,  0},
  71     { 0, 18,  0},
  72     { 0, 19,  0},
  73     { 0, 20,  0},
  74     { 0, 21,  0},
  75 };
  76
  77 /* takes three jamo chars and joins them into one hangul */
  78 unsigned short hangul_join(unsigned short lead, unsigned short vowel,
  79                                 unsigned short tail)
  80 {
  81     unsigned short ch = 0xfffd;
  82
  83     if (lead < 0x3131 || lead > 0x3163)
  84         return ch;
  85     lead = jamo_table[lead-0x3131][0];
  86
  87     if (vowel < 0x3131 || vowel > 0x3163)
  88         return ch;
  89     vowel = jamo_table[vowel-0x3131][1];
  90
  91     if (tail) {
  92         if (tail < 0x3131 || tail > 0x3163)
  93             return ch;
  94         tail = jamo_table[tail-0x3131][2];
  95         if (!tail)
  96             return ch;
  97     }
  98
  99     if (lead && vowel)
 100         ch = tail + (vowel - 1)*28 + (lead - 1)*588 + 44032;
 101
 102     return ch;
 103 }