Annotation of embedaddon/libiconv/lib/euc_jisx0213.h, revision 1.1.1.2
1.1 misho 1: /*
1.1.1.2 ! misho 2: * Copyright (C) 1999-2002, 2016 Free Software Foundation, Inc.
1.1 misho 3: * This file is part of the GNU LIBICONV Library.
4: *
5: * The GNU LIBICONV Library is free software; you can redistribute it
6: * and/or modify it under the terms of the GNU Library General Public
7: * License as published by the Free Software Foundation; either version 2
8: * of the License, or (at your option) any later version.
9: *
10: * The GNU LIBICONV Library is distributed in the hope that it will be
11: * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Library General Public License for more details.
14: *
15: * You should have received a copy of the GNU Library General Public
16: * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
1.1.1.2 ! misho 17: * If not, see <https://www.gnu.org/licenses/>.
1.1 misho 18: */
19:
20: /*
21: * EUC-JISX0213
22: */
23:
24: /* The structure of EUC-JISX0213 is as follows:
25:
26: 0x00..0x7F: ASCII
27:
28: 0x8E{A1..FE}: JISX0201 Katakana, with prefix 0x8E, offset by +0x80.
29:
30: 0x8F{A1..FE}{A1..FE}: JISX0213 plane 2, with prefix 0x8F, offset by +0x8080.
31:
32: 0x{A1..FE}{A1..FE}: JISX0213 plane 1, offset by +0x8080.
33:
34: Note that some JISX0213 characters are not contained in Unicode 3.2
35: and are therefore best represented as sequences of Unicode characters.
36: */
37:
38: #include "jisx0213.h"
39: #include "flushwc.h"
40:
41: static int
1.1.1.2 ! misho 42: euc_jisx0213_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
1.1 misho 43: {
44: ucs4_t last_wc = conv->istate;
45: if (last_wc) {
46: /* Output the buffered character. */
47: conv->istate = 0;
48: *pwc = last_wc;
49: return 0; /* Don't advance the input pointer. */
50: } else {
51: unsigned char c = *s;
52: if (c < 0x80) {
53: /* Plain ASCII character. */
54: *pwc = (ucs4_t) c;
55: return 1;
56: } else {
57: if ((c >= 0xa1 && c <= 0xfe) || c == 0x8e || c == 0x8f) {
58: /* Two or three byte character. */
59: if (n >= 2) {
60: unsigned char c2 = s[1];
61: if (c2 >= 0xa1 && c2 <= 0xfe) {
62: if (c == 0x8e) {
63: /* Half-width katakana. */
64: if (c2 <= 0xdf) {
65: *pwc = c2 + 0xfec0;
66: return 2;
67: }
68: } else {
69: ucs4_t wc;
70: if (c == 0x8f) {
71: /* JISX 0213 plane 2. */
72: if (n >= 3) {
73: unsigned char c3 = s[2];
74: wc = jisx0213_to_ucs4(0x200-0x80+c2,c3^0x80);
75: } else
76: return RET_TOOFEW(0);
77: } else {
78: /* JISX 0213 plane 1. */
79: wc = jisx0213_to_ucs4(0x100-0x80+c,c2^0x80);
80: }
81: if (wc) {
82: if (wc < 0x80) {
83: /* It's a combining character. */
84: ucs4_t wc1 = jisx0213_to_ucs_combining[wc - 1][0];
85: ucs4_t wc2 = jisx0213_to_ucs_combining[wc - 1][1];
86: /* We cannot output two Unicode characters at once. So,
87: output the first character and buffer the second one. */
88: *pwc = wc1;
89: conv->istate = wc2;
90: } else
91: *pwc = wc;
92: return (c == 0x8f ? 3 : 2);
93: }
94: }
95: }
96: } else
97: return RET_TOOFEW(0);
98: }
99: return RET_ILSEQ;
100: }
101: }
102: }
103:
104: #define euc_jisx0213_flushwc normal_flushwc
105:
106: /* Composition tables for each of the relevant combining characters. */
107: static const struct { unsigned short base; unsigned short composed; } euc_jisx0213_comp_table_data[] = {
108: #define euc_jisx0213_comp_table02e5_idx 0
109: #define euc_jisx0213_comp_table02e5_len 1
110: { 0xabe4, 0xabe5 }, /* 0x12B65 = 0x12B64 U+02E5 */
111: #define euc_jisx0213_comp_table02e9_idx (euc_jisx0213_comp_table02e5_idx+euc_jisx0213_comp_table02e5_len)
112: #define euc_jisx0213_comp_table02e9_len 1
113: { 0xabe0, 0xabe6 }, /* 0x12B66 = 0x12B60 U+02E9 */
114: #define euc_jisx0213_comp_table0300_idx (euc_jisx0213_comp_table02e9_idx+euc_jisx0213_comp_table02e9_len)
115: #define euc_jisx0213_comp_table0300_len 5
116: { 0xa9dc, 0xabc4 }, /* 0x12B44 = 0x1295C U+0300 */
117: { 0xabb8, 0xabc8 }, /* 0x12B48 = 0x12B38 U+0300 */
118: { 0xabb7, 0xabca }, /* 0x12B4A = 0x12B37 U+0300 */
119: { 0xabb0, 0xabcc }, /* 0x12B4C = 0x12B30 U+0300 */
120: { 0xabc3, 0xabce }, /* 0x12B4E = 0x12B43 U+0300 */
121: #define euc_jisx0213_comp_table0301_idx (euc_jisx0213_comp_table0300_idx+euc_jisx0213_comp_table0300_len)
122: #define euc_jisx0213_comp_table0301_len 4
123: { 0xabb8, 0xabc9 }, /* 0x12B49 = 0x12B38 U+0301 */
124: { 0xabb7, 0xabcb }, /* 0x12B4B = 0x12B37 U+0301 */
125: { 0xabb0, 0xabcd }, /* 0x12B4D = 0x12B30 U+0301 */
126: { 0xabc3, 0xabcf }, /* 0x12B4F = 0x12B43 U+0301 */
127: #define euc_jisx0213_comp_table309a_idx (euc_jisx0213_comp_table0301_idx+euc_jisx0213_comp_table0301_len)
128: #define euc_jisx0213_comp_table309a_len 14
129: { 0xa4ab, 0xa4f7 }, /* 0x12477 = 0x1242B U+309A */
130: { 0xa4ad, 0xa4f8 }, /* 0x12478 = 0x1242D U+309A */
131: { 0xa4af, 0xa4f9 }, /* 0x12479 = 0x1242F U+309A */
132: { 0xa4b1, 0xa4fa }, /* 0x1247A = 0x12431 U+309A */
133: { 0xa4b3, 0xa4fb }, /* 0x1247B = 0x12433 U+309A */
134: { 0xa5ab, 0xa5f7 }, /* 0x12577 = 0x1252B U+309A */
135: { 0xa5ad, 0xa5f8 }, /* 0x12578 = 0x1252D U+309A */
136: { 0xa5af, 0xa5f9 }, /* 0x12579 = 0x1252F U+309A */
137: { 0xa5b1, 0xa5fa }, /* 0x1257A = 0x12531 U+309A */
138: { 0xa5b3, 0xa5fb }, /* 0x1257B = 0x12533 U+309A */
139: { 0xa5bb, 0xa5fc }, /* 0x1257C = 0x1253B U+309A */
140: { 0xa5c4, 0xa5fd }, /* 0x1257D = 0x12544 U+309A */
141: { 0xa5c8, 0xa5fe }, /* 0x1257E = 0x12548 U+309A */
142: { 0xa6f5, 0xa6f8 }, /* 0x12678 = 0x12675 U+309A */
143: };
144:
145: static int
1.1.1.2 ! misho 146: euc_jisx0213_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
1.1 misho 147: {
148: int count = 0;
149: unsigned short lasttwo = conv->ostate;
150:
151: if (lasttwo) {
152: /* Attempt to combine the last character with this one. */
153: unsigned int idx;
154: unsigned int len;
155:
156: if (wc == 0x02e5)
157: idx = euc_jisx0213_comp_table02e5_idx,
158: len = euc_jisx0213_comp_table02e5_len;
159: else if (wc == 0x02e9)
160: idx = euc_jisx0213_comp_table02e9_idx,
161: len = euc_jisx0213_comp_table02e9_len;
162: else if (wc == 0x0300)
163: idx = euc_jisx0213_comp_table0300_idx,
164: len = euc_jisx0213_comp_table0300_len;
165: else if (wc == 0x0301)
166: idx = euc_jisx0213_comp_table0301_idx,
167: len = euc_jisx0213_comp_table0301_len;
168: else if (wc == 0x309a)
169: idx = euc_jisx0213_comp_table309a_idx,
170: len = euc_jisx0213_comp_table309a_len;
171: else
172: goto not_combining;
173:
174: do
175: if (euc_jisx0213_comp_table_data[idx].base == lasttwo)
176: break;
177: while (++idx, --len > 0);
178:
179: if (len > 0) {
180: /* Output the combined character. */
181: if (n >= 2) {
182: lasttwo = euc_jisx0213_comp_table_data[idx].composed;
183: r[0] = (lasttwo >> 8) & 0xff;
184: r[1] = lasttwo & 0xff;
185: conv->ostate = 0;
186: return 2;
187: } else
188: return RET_TOOSMALL;
189: }
190:
191: not_combining:
192: /* Output the buffered character. */
193: if (n < 2)
194: return RET_TOOSMALL;
195: r[0] = (lasttwo >> 8) & 0xff;
196: r[1] = lasttwo & 0xff;
197: r += 2;
198: count = 2;
199: }
200:
201: if (wc < 0x80) {
202: /* Plain ASCII character. */
203: if (n > count) {
204: r[0] = (unsigned char) wc;
205: conv->ostate = 0;
206: return count+1;
207: } else
208: return RET_TOOSMALL;
209: } else if (wc >= 0xff61 && wc <= 0xff9f) {
210: /* Half-width katakana. */
211: if (n >= count+2) {
212: r[0] = 0x8e;
213: r[1] = wc - 0xfec0;
214: conv->ostate = 0;
215: return count+2;
216: } else
217: return RET_TOOSMALL;
218: } else {
219: unsigned short jch = ucs4_to_jisx0213(wc);
220: if (jch != 0) {
221: if (jch & 0x0080) {
222: /* A possible match in comp_table_data. We have to buffer it. */
223: /* We know it's a JISX 0213 plane 1 character. */
224: if (jch & 0x8000) abort();
225: conv->ostate = jch | 0x8080;
226: return count+0;
227: }
228: if (jch & 0x8000) {
229: /* JISX 0213 plane 2. */
230: if (n >= count+3) {
231: r[0] = 0x8f;
232: r[1] = (jch >> 8) | 0x80;
233: r[2] = (jch & 0xff) | 0x80;
234: conv->ostate = 0;
235: return count+3;
236: } else
237: return RET_TOOSMALL;
238: } else {
239: /* JISX 0213 plane 1. */
240: if (n >= count+2) {
241: r[0] = (jch >> 8) | 0x80;
242: r[1] = (jch & 0xff) | 0x80;
243: conv->ostate = 0;
244: return count+2;
245: } else
246: return RET_TOOSMALL;
247: }
248: }
249: return RET_ILUNI;
250: }
251: }
252:
253: static int
1.1.1.2 ! misho 254: euc_jisx0213_reset (conv_t conv, unsigned char *r, size_t n)
1.1 misho 255: {
256: state_t lasttwo = conv->ostate;
257:
258: if (lasttwo) {
259: if (n < 2)
260: return RET_TOOSMALL;
261: r[0] = (lasttwo >> 8) & 0xff;
262: r[1] = lasttwo & 0xff;
263: /* conv->ostate = 0; will be done by the caller */
264: return 2;
265: } else
266: return 0;
267: }
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