1: /*
2: * Copyright (C) 1999-2001, 2005 Free Software Foundation, Inc.
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.
17: * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
18: * Fifth Floor, Boston, MA 02110-1301, USA.
19: */
20:
21: /*
22: * EUC-JP
23: */
24:
25: static int
26: euc_jp_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
27: {
28: unsigned char c = *s;
29: /* Code set 0 (ASCII or JIS X 0201-1976 Roman) */
30: if (c < 0x80)
31: return ascii_mbtowc(conv,pwc,s,n);
32: /* Code set 1 (JIS X 0208) */
33: if (c >= 0xa1 && c < 0xff) {
34: if (n < 2)
35: return RET_TOOFEW(0);
36: if (c < 0xf5) {
37: unsigned char c2 = s[1];
38: if (c2 >= 0xa1 && c2 < 0xff) {
39: unsigned char buf[2];
40: buf[0] = c-0x80; buf[1] = c2-0x80;
41: return jisx0208_mbtowc(conv,pwc,buf,2);
42: } else
43: return RET_ILSEQ;
44: } else {
45: /* User-defined range. See
46: * Ken Lunde's "CJKV Information Processing", table 4-66, p. 206. */
47: unsigned char c2 = s[1];
48: if (c2 >= 0xa1 && c2 < 0xff) {
49: *pwc = 0xe000 + 94*(c-0xf5) + (c2-0xa1);
50: return 2;
51: } else
52: return RET_ILSEQ;
53: }
54: }
55: /* Code set 2 (half-width katakana) */
56: if (c == 0x8e) {
57: if (n < 2)
58: return RET_TOOFEW(0);
59: {
60: unsigned char c2 = s[1];
61: if (c2 >= 0xa1 && c2 < 0xe0) {
62: int ret = jisx0201_mbtowc(conv,pwc,s+1,n-1);
63: if (ret == RET_ILSEQ)
64: return RET_ILSEQ;
65: if (ret != 1) abort();
66: return 2;
67: } else
68: return RET_ILSEQ;
69: }
70: }
71: /* Code set 3 (JIS X 0212-1990) */
72: if (c == 0x8f) {
73: if (n < 2)
74: return RET_TOOFEW(0);
75: {
76: unsigned char c2 = s[1];
77: if (c2 >= 0xa1 && c2 < 0xff) {
78: if (n < 3)
79: return RET_TOOFEW(0);
80: if (c2 < 0xf5) {
81: unsigned char c3 = s[2];
82: if (c3 >= 0xa1 && c3 < 0xff) {
83: unsigned char buf[2];
84: int ret;
85: buf[0] = c2-0x80; buf[1] = c3-0x80;
86: ret = jisx0212_mbtowc(conv,pwc,buf,2);
87: if (ret == RET_ILSEQ)
88: return RET_ILSEQ;
89: if (ret != 2) abort();
90: return 3;
91: } else
92: return RET_ILSEQ;
93: } else {
94: /* User-defined range. See
95: * Ken Lunde's "CJKV Information Processing", table 4-66, p. 206. */
96: unsigned char c3 = s[2];
97: if (c3 >= 0xa1 && c3 < 0xff) {
98: *pwc = 0xe3ac + 94*(c2-0xf5) + (c3-0xa1);
99: return 3;
100: } else
101: return RET_ILSEQ;
102: }
103: } else
104: return RET_ILSEQ;
105: }
106: }
107: return RET_ILSEQ;
108: }
109:
110: static int
111: euc_jp_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
112: {
113: unsigned char buf[2];
114: int ret;
115:
116: /* Code set 0 (ASCII or JIS X 0201-1976 Roman) */
117: ret = ascii_wctomb(conv,r,wc,n);
118: if (ret != RET_ILUNI)
119: return ret;
120:
121: /* Code set 1 (JIS X 0208) */
122: ret = jisx0208_wctomb(conv,buf,wc,2);
123: if (ret != RET_ILUNI) {
124: if (ret != 2) abort();
125: if (n < 2)
126: return RET_TOOSMALL;
127: r[0] = buf[0]+0x80;
128: r[1] = buf[1]+0x80;
129: return 2;
130: }
131:
132: /* Code set 2 (half-width katakana) */
133: ret = jisx0201_wctomb(conv,buf,wc,1);
134: if (ret != RET_ILUNI && buf[0] >= 0x80) {
135: if (ret != 1) abort();
136: if (n < 2)
137: return RET_TOOSMALL;
138: r[0] = 0x8e;
139: r[1] = buf[0];
140: return 2;
141: }
142:
143: /* Code set 3 (JIS X 0212-1990) */
144: ret = jisx0212_wctomb(conv,buf,wc,2);
145: if (ret != RET_ILUNI) {
146: if (ret != 2) abort();
147: if (n < 3)
148: return RET_TOOSMALL;
149: r[0] = 0x8f;
150: r[1] = buf[0]+0x80;
151: r[2] = buf[1]+0x80;
152: return 3;
153: }
154:
155: /* Extra compatibility with Shift_JIS. */
156: if (wc == 0x00a5) {
157: r[0] = 0x5c;
158: return 1;
159: }
160: if (wc == 0x203e) {
161: r[0] = 0x7e;
162: return 1;
163: }
164:
165: /* User-defined range. See
166: * Ken Lunde's "CJKV Information Processing", table 4-66, p. 206. */
167: if (wc >= 0xe000 && wc < 0xe758) {
168: if (wc < 0xe3ac) {
169: unsigned char c1, c2;
170: if (n < 2)
171: return RET_TOOSMALL;
172: c1 = (unsigned int) (wc - 0xe000) / 94;
173: c2 = (unsigned int) (wc - 0xe000) % 94;
174: r[0] = c1+0xf5;
175: r[1] = c2+0xa1;
176: return 2;
177: } else {
178: unsigned char c1, c2;
179: if (n < 3)
180: return RET_TOOSMALL;
181: c1 = (unsigned int) (wc - 0xe3ac) / 94;
182: c2 = (unsigned int) (wc - 0xe3ac) % 94;
183: r[0] = 0x8f;
184: r[1] = c1+0xf5;
185: r[2] = c2+0xa1;
186: return 3;
187: }
188: }
189:
190: return RET_ILUNI;
191: }
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