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
|
// set up a sparse array of all unicode codepoints listed in the index
// this will be used for lookup in iso2022jpEncoded
var jis0208CPs = []; // index is unicode cp, value is pointer
for (var p = 0; p < jis0208.length; p++) {
if (jis0208[p] != null && jis0208CPs[jis0208[p]] == null) {
jis0208CPs[jis0208[p]] = p;
}
}
// set up mappings for half/full width katakana
// index is a katakana index pointer, value is Unicode codepoint (dec)
// this is copy-pasted from the json version of the index belonging to the Encoding spec
var iso2022jpkatakana = [
12290,
12300,
12301,
12289,
12539,
12530,
12449,
12451,
12453,
12455,
12457,
12515,
12517,
12519,
12483,
12540,
12450,
12452,
12454,
12456,
12458,
12459,
12461,
12463,
12465,
12467,
12469,
12471,
12473,
12475,
12477,
12479,
12481,
12484,
12486,
12488,
12490,
12491,
12492,
12493,
12494,
12495,
12498,
12501,
12504,
12507,
12510,
12511,
12512,
12513,
12514,
12516,
12518,
12520,
12521,
12522,
12523,
12524,
12525,
12527,
12531,
12443,
12444
];
function chars2cps(chars) {
// this is needed because of javascript's handling of supplementary characters
// char: a string of unicode characters
// returns an array of decimal code point values
var haut = 0;
var out = [];
for (var i = 0; i < chars.length; i++) {
var b = chars.charCodeAt(i);
if (b < 0 || b > 0xffff) {
alert(
"Error in chars2cps: byte out of range " + b.toString(16) + "!"
);
}
if (haut != 0) {
if (0xdc00 <= b && b <= 0xdfff) {
out.push(0x10000 + ((haut - 0xd800) << 10) + (b - 0xdc00));
haut = 0;
continue;
} else {
alert(
"Error in chars2cps: surrogate out of range " +
haut.toString(16) +
"!"
);
haut = 0;
}
}
if (0xd800 <= b && b <= 0xdbff) {
haut = b;
} else {
out.push(b);
}
}
return out;
}
function iso2022jpEncoder(stream) {
var cps = chars2cps(stream);
var endofstream = 2000000;
var out = "";
var encState = "ascii";
var finished = false;
var cp, ptr;
while (!finished) {
if (cps.length == 0) cp = endofstream;
else cp = cps.shift();
if (cp == endofstream && encState != "ascii") {
cps.unshift(cp);
encState = "ascii";
out += " 1B 28 42";
continue;
}
if (cp == endofstream && encState == "ascii") {
finished = true;
continue;
}
if (
(encState === "ascii" || encState === "roman") &&
(cp === 0x0e || cp === 0x0f || cp === 0x1b)
) {
//out += ' &#'+cp+';'
// continue
return null;
}
if (encState == "ascii" && cp >= 0x00 && cp <= 0x7f) {
out += " " + cp.toString(16).toUpperCase();
continue;
}
if (
encState == "roman" &&
((cp >= 0x00 && cp <= 0x7f && cp !== 0x5c && cp !== 0x7e) ||
cp == 0xa5 ||
cp == 0x203e)
) {
if (cp >= 0x00 && cp <= 0x7f) {
// ASCII
out += " " + cp.toString(16).toUpperCase();
continue;
}
if (cp == 0xa5) {
out += " 5C";
continue;
}
if (cp == 0x203e) {
out += " 7E";
continue;
}
}
if (encState != "ascii" && cp >= 0x00 && cp <= 0x7f) {
cps.unshift(cp);
encState = "ascii";
out += " 1B 28 42";
continue;
}
if ((cp == 0xa5 || cp == 0x203e) && encState != "roman") {
cps.unshift(cp);
encState = "roman";
out += " 1B 28 4A";
continue;
}
if (cp == 0x2212) cp = 0xff0d;
if (cp >= 0xff61 && cp <= 0xff9f) {
cp = iso2022jpkatakana[cp - 0xff61];
}
ptr = jis0208CPs[cp];
if (ptr == null) {
//out += ' &#'+cp+';'
//continue
return null;
}
if (encState != "jis0208") {
cps.unshift(cp);
encState = "jis0208";
out += " 1B 24 42";
continue;
}
var lead = Math.floor(ptr / 94) + 0x21;
var trail = ptr % 94 + 0x21;
out +=
" " +
lead.toString(16).toUpperCase() +
" " +
trail.toString(16).toUpperCase();
}
return out.trim();
}
function convertToHex(str) {
// converts a string of ASCII characters to hex byte codes
var out = "";
var result;
for (var c = 0; c < str.length; c++) {
result =
str
.charCodeAt(c)
.toString(16)
.toUpperCase() + " ";
out += result;
}
return out;
}
function normalizeStr(str) {
var out = "";
for (var c = 0; c < str.length; c++) {
if (
str.charAt(c) == "%" &&
str.charAt(c + 1) != "%" &&
str.charAt(c + 2) != "%"
) {
out += String.fromCodePoint(
parseInt(str.charAt(c + 1) + str.charAt(c + 2), 16)
);
c += 2;
} else out += str.charAt(c);
}
var result = "";
for (var o = 0; o < out.length; o++) {
result +=
"%" +
out
.charCodeAt(o)
.toString(16)
.toUpperCase();
}
return result.replace(/%1B%28%42$/, "");
}
|
