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
|
#include "hkscs1999.h"
#include "flushwc.h"
static int
big5hkscs1999_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
ucs4_t last_wc = conv->istate;
if (last_wc) {
conv->istate = 0;
*pwc = last_wc;
return 0;
} else {
unsigned char c = *s;
if (c < 0x80)
return ascii_mbtowc(conv,pwc,s,n);
if (c >= 0xa1 && c < 0xff) {
if (n < 2)
return RET_TOOFEW(0);
{
unsigned char c2 = s[1];
if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) {
if (!((c == 0xc6 && c2 >= 0xa1) || c == 0xc7)) {
int ret = big5_mbtowc(conv,pwc,s,2);
if (ret != RET_ILSEQ)
return ret;
}
}
}
}
{
int ret = hkscs1999_mbtowc(conv,pwc,s,n);
if (ret != RET_ILSEQ)
return ret;
}
if (c == 0x88) {
if (n < 2)
return RET_TOOFEW(0);
{
unsigned char c2 = s[1];
if (c2 == 0x62 || c2 == 0x64 || c2 == 0xa3 || c2 == 0xa5) {
ucs4_t wc1 = ((c2 >> 3) << 2) + 0x009a;
ucs4_t wc2 = ((c2 & 6) << 2) + 0x02fc;
*pwc = wc1;
conv->istate = wc2;
return 2;
}
}
}
return RET_ILSEQ;
}
}
#define big5hkscs1999_flushwc normal_flushwc
static int
big5hkscs1999_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
int count = 0;
unsigned char last = conv->ostate;
if (last) {
if (wc == 0x0304 || wc == 0x030c) {
if (n >= 2) {
r[0] = 0x88;
r[1] = last + ((wc & 24) >> 2) - 4;
conv->ostate = 0;
return 2;
} else
return RET_TOOSMALL;
}
if (n < 2)
return RET_TOOSMALL;
r[0] = 0x88;
r[1] = last;
r += 2;
count = 2;
}
if (wc < 0x0080) {
if (n > count) {
r[0] = (unsigned char) wc;
conv->ostate = 0;
return count+1;
} else
return RET_TOOSMALL;
} else {
unsigned char buf[2];
int ret;
ret = big5_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (!((buf[0] == 0xc6 && buf[1] >= 0xa1) || buf[0] == 0xc7)) {
if (n >= count+2) {
r[0] = buf[0];
r[1] = buf[1];
conv->ostate = 0;
return count+2;
} else
return RET_TOOSMALL;
}
}
ret = hkscs1999_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if ((wc & ~0x0020) == 0x00ca) {
if (!(buf[0] == 0x88 && (buf[1] == 0x66 || buf[1] == 0xa7))) abort();
conv->ostate = buf[1];
return count+0;
}
if (n >= count+2) {
r[0] = buf[0];
r[1] = buf[1];
conv->ostate = 0;
return count+2;
} else
return RET_TOOSMALL;
}
return RET_ILUNI;
}
}
static int
big5hkscs1999_reset (conv_t conv, unsigned char *r, int n)
{
unsigned char last = conv->ostate;
if (last) {
if (n < 2)
return RET_TOOSMALL;
r[0] = 0x88;
r[1] = last;
return 2;
} else
return 0;
}
|