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
|
static int
hz_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
state_t state = conv->istate;
unsigned int count = 0;
unsigned char c;
for (;;) {
c = *s;
if (c == '~') {
if (n < count+2)
goto none;
c = s[1];
if (state == 0) {
if (c == '~') {
*pwc = (ucs4_t) '~';
conv->istate = state;
return count+2;
}
if (c == '{') {
state = 1;
s += 2; count += 2;
if (n < count+1)
goto none;
continue;
}
if (c == '\n') {
s += 2; count += 2;
if (n < count+1)
goto none;
continue;
}
} else {
if (c == '}') {
state = 0;
s += 2; count += 2;
if (n < count+1)
goto none;
continue;
}
}
goto ilseq;
}
break;
}
if (state == 0) {
*pwc = (ucs4_t) c;
conv->istate = state;
return count+1;
} else {
int ret;
if (n < count+2)
goto none;
ret = gb2312_mbtowc(conv,pwc,s,2);
if (ret == RET_ILSEQ)
goto ilseq;
if (ret != 2) abort();
conv->istate = state;
return count+2;
}
none:
conv->istate = state;
return RET_TOOFEW(count);
ilseq:
conv->istate = state;
return RET_SHIFT_ILSEQ(count);
}
static int
hz_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
state_t state = conv->ostate;
unsigned char buf[2];
int ret;
ret = ascii_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
if (ret != 1) abort();
if (buf[0] < 0x80) {
int count = (state ? 3 : 1);
if (n < count)
return RET_TOOSMALL;
if (state) {
r[0] = '~';
r[1] = '}';
r += 2;
state = 0;
}
r[0] = buf[0];
conv->ostate = state;
return count;
}
}
ret = gb2312_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (buf[0] < 0x80 && buf[1] < 0x80) {
int count = (state ? 2 : 4);
if (n < count)
return RET_TOOSMALL;
if (!state) {
r[0] = '~';
r[1] = '{';
r += 2;
state = 1;
}
r[0] = buf[0];
r[1] = buf[1];
conv->ostate = state;
return count;
}
}
return RET_ILUNI;
}
static int
hz_reset (conv_t conv, unsigned char *r, int n)
{
state_t state = conv->ostate;
if (state) {
if (n < 2)
return RET_TOOSMALL;
r[0] = '~';
r[1] = '}';
return 2;
} else
return 0;
}
|