summaryrefslogtreecommitdiff
path: root/Build/source/texk/ptexenc/unicode-jp.c
blob: 4bc896b14e143e02dc1337e8821fb31fb11a7e3d (plain)
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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
/*
  unicode-jp.c -- JIS X 0208 <=> UCS-2 converter
  written by N. Tsuchimura
*/

#include <ptexenc/c-auto.h>
#include <ptexenc/unicode-jp.h>
#include <ptexenc/kanjicnv.h>
#include <ptexenc/ptexenc.h>

#if defined(KANJI_ICONV) && defined(HAVE_ICONV_H)
#include <iconv.h>
#include <stdlib.h> /* for atexit() */

#define ICONV_INVALID ((iconv_t)(-1))
#define ICONV_JIS "ISO-2022-JP"
#define ICONV_UNI "UCS-2BE"

static int inited = FALSE;
static iconv_t i_jis2ucs2 = ICONV_INVALID;
static iconv_t i_ucs22jis = ICONV_INVALID;

#ifdef HAVE_ATEXIT
static void close_iconv(void)
#else /* HAVE_ATEXIT */
static void close_iconv(int dummy1, void *dummy2)
#endif /* HAVE_ATEXIT */
{
    if (i_jis2ucs2 != ICONV_INVALID) iconv_close(i_jis2ucs2);
    if (i_ucs22jis != ICONV_INVALID) iconv_close(i_ucs22jis);
}

static void open_iconv(void)
{
    inited = true;
    i_jis2ucs2 = iconv_open(ICONV_UNI, ICONV_JIS);
    i_ucs22jis = iconv_open(ICONV_JIS, ICONV_UNI);

#ifdef HAVE_ATEXIT
    atexit(close_iconv);
#endif /* HAVE_ATEXIT */
#ifdef HAVE_ON_EXIT
    on_exit(close_iconv, NULL);
#endif /* HAVE_ON_EXIT */
}

/* convert a JIS X 0208 char to UCS-2 */
static int JIStoUCS2native(int jis)
{
    unsigned char jis_seq[8] = {
	0x1b, 0x24, 0x42, /* JIS X 0208-1983 */
	(unsigned char)HI(jis), (unsigned char)LO(jis),
	0x1b, 0x28, 0x42, /* ASCII */
    };
    unsigned char unicode[2];
    size_t from = sizeof jis_seq;
    size_t to   = sizeof unicode;
    char *from_ptr = (char *)jis_seq;
    char *to_ptr   = (char *)unicode;

    if (!inited) open_iconv();
    if (i_jis2ucs2 == ICONV_INVALID) return 0;

    if (iconv(i_jis2ucs2, &from_ptr, &from, &to_ptr, &to) == (size_t)(-1)) {
	return 0;
    }
    return HILO(unicode[0], unicode[1]);
}

/* convert a UCS-2 char to JIS X 0208 */
static int UCS2toJISnative(int ucs2)
{
    unsigned char unicode[2] = {
        (unsigned char)HI(ucs2), (unsigned char)LO(ucs2),
    };
    unsigned char jis_seq[10] = { 0,0,0,0,0,0,0,0,0,0 };
    size_t from = sizeof unicode;
    size_t to   = sizeof jis_seq;
    char *from_ptr = (char *)unicode;
    char *to_ptr   = (char *)jis_seq;
    unsigned char *ret = jis_seq;

    if (!inited) open_iconv();
    if (i_ucs22jis == ICONV_INVALID) return 0;

    if (iconv(i_ucs22jis, &from_ptr, &from, &to_ptr, &to) == (size_t)(-1)) {
	return 0;
    }
    if (ret[0] == 0x1b) ret += 3;
    return HILO(ret[0], ret[1]);
}

#else /* KANJI_ICONV && HAVE_ICONV_H */

#include "jisx0208.h"
#define MAXJIS 84

/* convert a JIS X 0208 char to UCS-2 */
static int JIStoUCS2native(int jis)
{
    int hi, low;

    hi  = HI(jis) - 0x21;
    low = LO(jis) - 0x21;
    if (0 <= hi  && hi  < MAXJIS &&
        0 <= low && low < 94) return (int)UnicodeTbl[hi][low];
    return 0;
}

/* convert a UCS-2 char to JIS X 0208 */
static int UCS2toJISnative(int ucs2)
{
    int i, j;

    if (ucs2==0) return 0;
    for (i=0; i<MAXJIS; i++) {
        for (j=0; j<94; j++) {
            if (UnicodeTbl[i][j] == ucs2) {
                return HILO(i, j) + 0x2121;
            }
        }
    }
    return 0;
}
#endif /* KANJI_ICONV && HAVE_ICONV_H */


/*
  http://www.t-lab.opal.ne.jp/tex/jis_uni_variation_uptex.html
  http://hp.vector.co.jp/authors/VA010341/unicode/
  http://www.jca.apc.org/~earthian/aozora/0213/jisx0213code.zip
*/
static unsigned short int variation[] = {
    /* JIS X 0208, UCS-2(1), UCS-2(2), ..., 0(sentinel) */
    /* UCS-2(1) is used for JIS -> UCS conversion if is_internalUPTEX */
    0x2131 /* 1-17 */, 0xFFE3, 0x203E, 0,
    0x213D /* 1-29 */, 0x2015, 0x2014, 0,
    0x2141 /* 1-33 */, 0x301C, 0xFF5E, 0,
    0x2142 /* 1-34 */, 0x2016, 0x2225, 0,
    0x2144 /* 1-36 */, 0x2026, 0x22EF, 0,
    0x215D /* 1-61 */, 0x2212, 0xFF0D, 0,
    0x216F /* 1-79 */, 0xFFE5, 0x00A5, 0,
    0x2171 /* 1-81 */, 0xFFE0, 0x00A2, 0,
    0x2172 /* 1-82 */, 0xFFE1, 0x00A3, 0,
    0x224C /* 2-44 */, 0xFFE2, 0x00AC, 0,
    0 /* end */
};
/*
  if is_internalUPTEX, force JIS X 0208 -> UCS2 conversion as follows:
 JIS code (men-ku) ->  UCS    ( Character Name          )
  0x2131  ( 1-17 ) ->  U+FFE3 ( FULLWIDTH MACRON        )
  0x213D  ( 1-29 ) ->  U+2015 ( HORIZONTAL BAR          )
  0x2141  ( 1-33 ) ->  U+301C ( WAVE DASH               )
  0x2142  ( 1-34 ) ->  U+2016 ( DOUBLE VERTICAL LINE    )
  0x2144  ( 1-36 ) ->  U+2026 ( HORIZONTAL ELLIPSIS     )
  0x215D  ( 1-61 ) ->  U+2212 ( MINUS SIGN              )
  0x216F  ( 1-79 ) ->  U+FFE5 ( FULLWIDTH YEN SIGN      )
  0x2171  ( 1-81 ) ->  U+FFE0 ( FULLWIDTH NOT SIGN      )
  0x2172  ( 1-82 ) ->  U+FFE1 ( FULLWIDTH POUND SIGN    )
  0x224C  ( 2-44 ) ->  U+FFE2 ( FULLWIDTH NOT SIGN      )
*/

/*
  voiced sound of kana
  http://developer.apple.com/technotes/tn/tn1150table.html
*/
static unsigned short int voiced_sounds[] = {
    /* from,  to */
    0x3046, 0x3094,
    0x304B, 0x304C,
    0x304D, 0x304E,
    0x304F, 0x3050,
    0x3051, 0x3052,
    0x3053, 0x3054,
    0x3055, 0x3056,
    0x3057, 0x3058,
    0x3059, 0x305A,
    0x305B, 0x305C,
    0x305D, 0x305E,
    0x305F, 0x3060,
    0x3061, 0x3062,
    0x3064, 0x3065,
    0x3066, 0x3067,
    0x3068, 0x3069,
    0x306F, 0x3070,
    0x3072, 0x3073,
    0x3075, 0x3076,
    0x3078, 0x3079,
    0x307B, 0x307C,
    0x309D, 0x309E,
    0x30A6, 0x30F4,
    0x30AB, 0x30AC,
    0x30AD, 0x30AE,
    0x30AF, 0x30B0,
    0x30B1, 0x30B2,
    0x30B3, 0x30B4,
    0x30B5, 0x30B6,
    0x30B7, 0x30B8,
    0x30B9, 0x30BA,
    0x30BB, 0x30BC,
    0x30BD, 0x30BE,
    0x30BF, 0x30C0,
    0x30C1, 0x30C2,
    0x30C4, 0x30C5,
    0x30C6, 0x30C7,
    0x30C8, 0x30C9,
    0x30CF, 0x30D0,
    0x30D2, 0x30D3,
    0x30D5, 0x30D6,
    0x30D8, 0x30D9,
    0x30DB, 0x30DC,
    0x30EF, 0x30F7,
    0x30F0, 0x30F8,
    0x30F1, 0x30F9,
    0x30F2, 0x30FA,
    0x30FD, 0x30FE,
    0 /* end mark */
};

/* semi voiced sound of kana */
static unsigned short int semi_voiced_sounds[] = {
    /* from,  to */
    0x306F, 0x3071,
    0x3072, 0x3074,
    0x3075, 0x3077,
    0x3078, 0x307A,
    0x307B, 0x307D,
    0x30CF, 0x30D1,
    0x30D2, 0x30D4,
    0x30D5, 0x30D7,
    0x30D8, 0x30DA,
    0x30DB, 0x30DD,
    0 /* end mark */
};

/* convert a JIS X 0208 char to UCS-2 */
int JIStoUCS2(int jis)
{
    int i, j;

    /* first: variation table */
    if (is_internalUPTEX()) {
      for (i=0; variation[i]!=0; i=j+1) {
        if (variation[i] == jis) return variation[i+1];
	for (j=i+3; variation[j]!=0; j++) ;
      }
    }

    /* second: UnicodeTbl[][] */
    return JIStoUCS2native(jis);
}

/* convert a UCS-2 char to JIS X 0208 */
int UCS2toJIS(int ucs2)
{
    int i, j;

    /* first: variation table */
    for (i=0; variation[i]!=0; i=j+1) {
        for (j=i+1; variation[j]!=0; j++) {
            if (variation[j] == ucs2) return variation[i];
        }
    }

    /* second: UnicodeTbl[][] */
    return UCS2toJISnative(ucs2);
}


/* for U+3099 or U+309A */
int get_voiced_sound(int ucs2, boolean semi)
{
    int i;
    unsigned short int *table;

    if (semi) table = semi_voiced_sounds;
    else      table = voiced_sounds;
    for (i=0; table[i]!=0; i+=2) {
        if (ucs2 == table[i]) return table[i+1];
    }
    return 0;
}

#ifdef TEST
#include <stdio.h>
int main(int argc, char **argv) {
    int hi, low;
    for (hi=0; hi<MAXJIS; hi++) {
        for (low=0; low<94; low++) {
	    int jis = HILO(hi, low) + 0x2121;
            int uni = JIStoUCS2(jis);
            int jis2 = UCS2toJIS(uni);
            if (uni != 0 && jis != jis2) {
                printf("0x%x(%c%c) uni=0x%04x, jis2=0x%04x\n",
                       jis, HI(jis)|0x80, LO(jis)|0x80, uni, jis2);
            }
        }
    }
    return 0;
}
#endif /* TEST */