File: ksc5601.h

package info (click to toggle)
glibc 2.28-8
  • links: PTS, VCS
  • area: main
  • in suites: buster, experimental, sid
  • size: 271,788 kB
  • sloc: ansic: 1,008,637; asm: 259,607; makefile: 11,271; sh: 10,477; python: 6,910; cpp: 4,992; perl: 2,258; awk: 2,005; yacc: 290; pascal: 182; sed: 73
file content (195 lines) | stat: -rw-r--r-- 4,678 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
/* Access functions for KS C 5601-1992 based encoding conversion.
   Copyright (C) 1998-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _KSC5601_H
#define _KSC5601_H	1

#define KSC5601_HANGUL 2350
#define KSC5601_HANJA  4888
#define KSC5601_SYMBOL  989

#include <gconv.h>
#include <stdint.h>

/* Structure to map from UCS to KSC.  This structure should be packed
   on all platforms.  */
struct map
{
  uint16_t ucs;
  char val[2];
};

/* Conversion table.  */
extern const uint16_t __ksc5601_hangul_to_ucs[KSC5601_HANGUL];
extern const uint16_t __ksc5601_sym_to_ucs[];
extern const struct map __ksc5601_sym_from_ucs[KSC5601_SYMBOL];
extern const uint16_t __ksc5601_hanja_to_ucs[KSC5601_HANJA];
extern const struct map __ksc5601_hanja_from_ucs[KSC5601_HANJA];


static inline uint32_t
__attribute ((always_inline))
ksc5601_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
{
  unsigned char ch = **s;
  unsigned char ch2;
  int idx;

  /* row 94(0x7e) and row 41(0x49) are user-defined area in KS C 5601 */

  if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) >= 0x7e
      || (ch - offset) == 0x49)
    return __UNKNOWN_10646_CHAR;

  if (avail < 2)
    return 0;

  ch2 = (*s)[1];
  if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
    return __UNKNOWN_10646_CHAR;

  idx = (ch - offset - 0x21) * 94 + (ch2 - offset - 0x21);

  /* 1410 = 15 * 94 , 3760 = 40 * 94
     Hangul in KS C 5601 : row 16 - row 40 */

  *s += 2;

  if (idx >= 1410 && idx < 1410 + KSC5601_HANGUL)
    return (__ksc5601_hangul_to_ucs[idx - 1410]
	    ?: (*s -= 2, __UNKNOWN_10646_CHAR));
  else if (idx >= 3854)
    /* Hanja : row 42 - row 93 : 3854 = 94 * (42-1) */
   return (__ksc5601_hanja_to_ucs[idx - 3854]
	   ?: (*s -= 2, __UNKNOWN_10646_CHAR));
  else if (idx <= 1114)
    return __ksc5601_sym_to_ucs[idx] ?: (*s -= 2, __UNKNOWN_10646_CHAR);

  *s -= 2;
  return __UNKNOWN_10646_CHAR;
}

static inline size_t
__attribute ((always_inline))
ucs4_to_ksc5601_hangul (uint32_t wch, unsigned char *s, size_t avail)
{
  int l = 0;
  int u = KSC5601_HANGUL - 1;
  uint32_t try;

  while (l <= u)
    {
      int m = (l + u) / 2;
      try = (uint32_t) __ksc5601_hangul_to_ucs[m];
      if (try > wch)
	u = m - 1;
      else if (try < wch)
	l= m + 1;
      else
	{
	  if (avail < 2)
	    return 0;

	  s[0] = (m / 94) + 0x30;
	  s[1] = (m % 94) + 0x21;

	  return 2;
	}
    }

  return __UNKNOWN_10646_CHAR;
}


static inline size_t
__attribute ((always_inline))
ucs4_to_ksc5601_hanja (uint32_t wch, unsigned char *s, size_t avail)
{
  int l = 0;
  int u = KSC5601_HANJA - 1;
  uint32_t try;

  while (l <= u)
    {
      int m = (l + u) / 2;
      try = (uint32_t) __ksc5601_hanja_from_ucs[m].ucs;
      if (try > wch)
	u=m-1;
      else if (try < wch)
	l = m + 1;
      else
	{
	  if (avail < 2)
	    return 0;

	  s[0] = __ksc5601_hanja_from_ucs[m].val[0];
	  s[1] = __ksc5601_hanja_from_ucs[m].val[1];

	  return 2;
	}
    }

  return __UNKNOWN_10646_CHAR;
}

static inline  size_t
__attribute ((always_inline))
ucs4_to_ksc5601_sym (uint32_t wch, unsigned char *s, size_t avail)
{
  int l = 0;
  int u = KSC5601_SYMBOL - 1;
  uint32_t try;

  while (l <= u)
    {
      int m = (l + u) / 2;
      try = __ksc5601_sym_from_ucs[m].ucs;
      if (try > wch)
	u = m - 1;
      else if (try < wch)
	l = m + 1;
      else
	{
	  if (avail < 2)
	    return 0;

	  s[0] = __ksc5601_sym_from_ucs[m].val[0];
	  s[1] = __ksc5601_sym_from_ucs[m].val[1];

	  return 2;
	}
    }

  return __UNKNOWN_10646_CHAR;
}


static inline size_t
__attribute ((always_inline))
ucs4_to_ksc5601 (uint32_t wch, unsigned char *s, size_t avail)
{
  if (wch >= 0xac00 && wch <= 0xd7a3)
    return ucs4_to_ksc5601_hangul (wch, s, avail);
  else if ((wch >= 0x4e00 && wch <= 0x9fff)
	   || (wch >= 0xf900 && wch <= 0xfa0b))
    return ucs4_to_ksc5601_hanja (wch, s, avail);
  else
    return ucs4_to_ksc5601_sym (wch, s, avail);
}

#endif /* ksc5601.h */