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 | var extend = function(target) {
|
28 | target = target || {};
|
29 | Array.prototype.slice.call(arguments, 1).forEach(function(obj) {
|
30 | Object.keys(obj || {}).forEach(function(key) {
|
31 | target[key] = obj[key];
|
32 | });
|
33 | });
|
34 | return target;
|
35 | };
|
36 |
|
37 | var singlebyte = function(){
|
38 |
|
39 | if(!( this instanceof singlebyte )){
|
40 | return new singlebyte();
|
41 | }
|
42 |
|
43 | this.encodings = [];
|
44 |
|
45 |
|
46 | this.learnEncoding('cp437', this.extendASCII([
|
47 | 0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
|
48 | 0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
|
49 | 0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
|
50 | 0xFF, 0xD6, 0xDC, 0xA2, 0xA3, 0xA5, 0x20A7, 0x192,
|
51 | 0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
|
52 | 0xBF, 0x2310, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
|
53 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
|
54 | 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
|
55 | 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
|
56 | 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
|
57 | 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
|
58 | 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
|
59 | 0x3B1, 0x3B2, 0x393, 0x3C0, 0x3A3, 0x3C3, 0x3BC, 0x3C4,
|
60 | 0x3A6, 0x398, 0x3A9, 0x3B4, 0x221E, 0x3C6, 0x3B5, 0x2229,
|
61 | 0x2261, 0xB1, 0x2265, 0x2264, 0x2320, 0x2321, 0xF7, 0x2248,
|
62 | 0xB0, 0x2219, 0xB7, 0x221A, 0x207F, 0xB2, 0x25A0, 0xA0
|
63 | ]));
|
64 |
|
65 |
|
66 | this.learnEncoding('cp850', this.extendASCII([
|
67 | 0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
|
68 | 0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
|
69 | 0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
|
70 | 0xFF, 0xD6, 0xDC, 0xF8, 0xA3, 0xD8, 0xD7, 0x192,
|
71 | 0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
|
72 | 0xBF, 0xAE, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
|
73 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0xC1, 0xC2, 0xC0,
|
74 | 0xA9, 0x2563, 0x2551, 0x2557, 0x255D, 0xA2, 0xA5, 0x2510,
|
75 | 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0xE3, 0xC3,
|
76 | 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0xA4,
|
77 | 0xF0, 0xD0, 0xCA, 0xCB, 0xC8, 0x131, 0xCD, 0xCE,
|
78 | 0xCF, 0x2518, 0x250C, 0x2588, 0x2584, 0xA6, 0xCC, 0x2580,
|
79 | 0xD3, 0xDF, 0xD4, 0xD2, 0xF5, 0xD5, 0xB5, 0xFE,
|
80 | 0xDE, 0xDA, 0xDB, 0xD9, 0xFD, 0xDD, 0xAF, 0xB4,
|
81 | 0xAD, 0xB1, 0x2017, 0xBE, 0xB6, 0xA7, 0xF7, 0xB8,
|
82 | 0xB0, 0xA8, 0xB7, 0xB9, 0xB3, 0xB2, 0x25A0, 0xA0
|
83 | ]));
|
84 |
|
85 |
|
86 | this.learnEncoding('cp858', this.extendASCII([
|
87 | 0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
|
88 | 0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
|
89 | 0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
|
90 | 0xFF, 0xD6, 0xDC, 0xF8, 0xA3, 0xD8, 0xD7, 0x192,
|
91 | 0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
|
92 | 0xBF, 0xAE, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
|
93 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0xC1, 0xC2, 0xC0,
|
94 | 0xA9, 0x2563, 0x2551, 0x2557, 0x255D, 0xA2, 0xA5, 0x2510,
|
95 | 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0xE3, 0xC3,
|
96 | 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0xA4,
|
97 | 0xF0, 0xD0, 0xCA, 0xCB, 0xC8, 0x20AC, 0xCD, 0xCE,
|
98 | 0xCF, 0x2518, 0x250C, 0x2588, 0x2584, 0xA6, 0xCC, 0x2580,
|
99 | 0xD3, 0xDF, 0xD4, 0xD2, 0xF5, 0xD5, 0xB5, 0xFE,
|
100 | 0xDE, 0xDA, 0xDB, 0xD9, 0xFD, 0xDD, 0xAF, 0xB4,
|
101 | 0xAD, 0xB1, 0x2017, 0xBE, 0xB6, 0xA7, 0xF7, 0xB8,
|
102 | 0xB0, 0xA8, 0xB7, 0xB9, 0xB3, 0xB2, 0x25A0, 0xA0
|
103 | ]));
|
104 |
|
105 |
|
106 | this.learnEncoding('cp808', this.extendASCII([
|
107 | 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417,
|
108 | 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F,
|
109 | 0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427,
|
110 | 0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F,
|
111 | 0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437,
|
112 | 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F,
|
113 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
|
114 | 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
|
115 | 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
|
116 | 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
|
117 | 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
|
118 | 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
|
119 | 0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447,
|
120 | 0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F,
|
121 | 0x401, 0x451, 0x404, 0x454, 0x407, 0x457, 0x40E, 0x45E,
|
122 | 0xB0, 0x2219, 0xB7, 0x221A, 0x2116, 0x20AC, 0x25A0, 0xA0
|
123 | ]));
|
124 |
|
125 |
|
126 | this.learnEncoding('cp866', this.extendASCII([
|
127 | 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417,
|
128 | 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F,
|
129 | 0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427,
|
130 | 0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F,
|
131 | 0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437,
|
132 | 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F,
|
133 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
|
134 | 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
|
135 | 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
|
136 | 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
|
137 | 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
|
138 | 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
|
139 | 0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447,
|
140 | 0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F,
|
141 | 0x401, 0x451, 0x404, 0x454, 0x407, 0x457, 0x40E, 0x45E,
|
142 | 0xB0, 0x2219, 0xB7, 0x221A, 0x2116, 0xA4, 0x25A0, 0xA0
|
143 | ]));
|
144 |
|
145 |
|
146 | this.learnEncoding('cp1125', this.extendASCII([
|
147 | 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417,
|
148 | 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F,
|
149 | 0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427,
|
150 | 0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F,
|
151 | 0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437,
|
152 | 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F,
|
153 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
|
154 | 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
|
155 | 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
|
156 | 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
|
157 | 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
|
158 | 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
|
159 | 0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447,
|
160 | 0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F,
|
161 | 0x401, 0x451, 0x490, 0x491, 0x404, 0x454, 0x406, 0x456,
|
162 | 0x407, 0x457, 0xB7, 0x221A, 0x2116, 0xA4, 0x25A0, 0xA0
|
163 | ]));
|
164 |
|
165 |
|
166 | this.learnEncoding('koi8-r', this.extendASCII([
|
167 | 0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
|
168 | 0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
|
169 | 0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
|
170 | 0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7,
|
171 | 0x2550, 0x2551, 0x2552, 0x451, 0x2553, 0x2554, 0x2555, 0x2556,
|
172 | 0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x255C, 0x255D, 0x255E,
|
173 | 0x255F, 0x2560, 0x2561, 0x401, 0x2562, 0x2563, 0x2564, 0x2565,
|
174 | 0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x256B, 0x256C, 0xA9,
|
175 | 0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433,
|
176 | 0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E,
|
177 | 0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432,
|
178 | 0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A,
|
179 | 0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413,
|
180 | 0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E,
|
181 | 0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412,
|
182 | 0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A
|
183 | ]));
|
184 |
|
185 |
|
186 | this.learnEncoding('koi8-u', this.extendASCII([
|
187 | 0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
|
188 | 0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
|
189 | 0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
|
190 | 0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7,
|
191 | 0x2550, 0x2551, 0x2552, 0x451, 0x454, 0x2554, 0x456, 0x457,
|
192 | 0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x491, 0x255D, 0x255E,
|
193 | 0x255F, 0x2560, 0x2561, 0x401, 0x404, 0x2563, 0x406, 0x407,
|
194 | 0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x490, 0x256C, 0xA9,
|
195 | 0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433,
|
196 | 0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E,
|
197 | 0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432,
|
198 | 0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A,
|
199 | 0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413,
|
200 | 0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E,
|
201 | 0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412,
|
202 | 0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A
|
203 | ]));
|
204 |
|
205 |
|
206 | this.learnEncoding('koi8-ru', this.extendASCII([
|
207 | 0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
|
208 | 0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
|
209 | 0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
|
210 | 0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7,
|
211 | 0x2550, 0x2551, 0x2552, 0x451, 0x454, 0x2554, 0x456, 0x457,
|
212 | 0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x491, 0x45E, 0x255E,
|
213 | 0x255F, 0x2560, 0x2561, 0x401, 0x404, 0x2563, 0x406, 0x407,
|
214 | 0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x490, 0x40E, 0xA9,
|
215 | 0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433,
|
216 | 0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E,
|
217 | 0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432,
|
218 | 0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A,
|
219 | 0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413,
|
220 | 0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E,
|
221 | 0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412,
|
222 | 0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A
|
223 | ]));
|
224 |
|
225 |
|
226 | this.learnEncoding('latin-1', this.extendASCII([
|
227 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
|
228 | 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
|
229 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
|
230 | 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
|
231 | 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
|
232 | 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
|
233 | 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
|
234 | 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
|
235 | 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
|
236 | 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
|
237 | 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
|
238 | 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
|
239 | 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
|
240 | 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
|
241 | 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
|
242 | 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
|
243 | ]));
|
244 |
|
245 |
|
246 | this.learnEncoding('cp1252', this.extendASCII([
|
247 | 0x20AC, 0x81, 0x201A, 0x192, 0x201E, 0x2026, 0x2020, 0x2021,
|
248 | 0x2C6, 0x2030, 0x160, 0x2039, 0x152, 0x8D, 0x017D, 0x8F,
|
249 | 0x90, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
|
250 | 0x02DC, 0x2122, 0x161, 0x203A, 0x0153, 0x9D, 0x17E, 0x178,
|
251 | 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
|
252 | 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
|
253 | 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
|
254 | 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
|
255 | 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
|
256 | 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
|
257 | 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
|
258 | 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
|
259 | 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
|
260 | 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
|
261 | 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
|
262 | 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
|
263 | ]));
|
264 | };
|
265 |
|
266 | singlebyte.prototype.isEncoding = function(encodingName){
|
267 | if( Buffer.isEncoding(encodingName) ) return true;
|
268 | for( var i = 0; i < this.encodings.length; i++ ){
|
269 | if( this.encodings[i].name === encodingName ) return true;
|
270 | }
|
271 | return false;
|
272 | };
|
273 |
|
274 | singlebyte.prototype.learnEncoding = function(encodingName, encodingTable){
|
275 |
|
276 | if( Buffer.isEncoding(encodingName) ){
|
277 | throw new Error(this.errors.BUFFER_ENCODING);
|
278 | }
|
279 |
|
280 | if( encodingTable.length !== 256 ){
|
281 | throw new Error(this.errors.INVALID_TABLE_LENGTH);
|
282 | }
|
283 |
|
284 | var _this = this;
|
285 | encodingTable = encodingTable.map(function(item){
|
286 | var nextCode = item |0;
|
287 | if( 0 > nextCode || nextCode > 0x10FFFF ){
|
288 | throw new Error(_this.errors.OUT_OF_UNICODE);
|
289 | }
|
290 | return item;
|
291 | });
|
292 |
|
293 | if( this.isEncoding(encodingName) ){
|
294 | for( var i = 0; i < this.encodings.length; i++ ){
|
295 | if( this.encodings[i].name === encodingName ){
|
296 | this.encodings[i].table = encodingTable;
|
297 | return;
|
298 | }
|
299 | }
|
300 | } else {
|
301 | this.encodings.push({
|
302 | name: encodingName,
|
303 | table: encodingTable
|
304 | });
|
305 | }
|
306 | };
|
307 |
|
308 | singlebyte.prototype.getEncodingTable = function(encodingName){
|
309 | for( var i = 0; i < this.encodings.length; i++ ){
|
310 | if( this.encodings[i].name === encodingName ){
|
311 | return this.encodings[i].table;
|
312 | }
|
313 | }
|
314 | return null;
|
315 | };
|
316 |
|
317 | singlebyte.prototype.extendASCII = function(extensionTable){
|
318 | if( extensionTable.length !== 128 ){
|
319 | throw new Error(this.errors.INVALID_EXTENSION);
|
320 | }
|
321 |
|
322 | var output = [];
|
323 | for( var i = 0; i < 128; i++ ) output.push(i);
|
324 | return output.concat(extensionTable);
|
325 | };
|
326 |
|
327 | singlebyte.prototype.bufToStr = function(buf, encoding, start, end){
|
328 |
|
329 | if(!( Buffer.isBuffer(buf) )){
|
330 | throw new Error(this.errors.NOT_A_BUFFER);
|
331 | }
|
332 | if( Buffer.isEncoding(encoding) ){
|
333 | return buf.toString(encoding, start, end);
|
334 | }
|
335 | var table = this.getEncodingTable(encoding);
|
336 | if( table === null ) throw new Error(this.errors.UNKNOWN_ENCODING);
|
337 |
|
338 | if( typeof end === 'undefined' ) end = buf.length;
|
339 | if( typeof start === 'undefined' ) start = 0;
|
340 |
|
341 | var output = '';
|
342 | var sourceValue;
|
343 | for( var i = start; i < end; i++ ){
|
344 | sourceValue = table[ buf[i] ];
|
345 | if( sourceValue <= 0xFFFF ){
|
346 | output += String.fromCharCode(sourceValue);
|
347 | } else if( 0x10000 <= sourceValue && sourceValue <= 0x10FFFF ){
|
348 | sourceValue -= 0x10000;
|
349 | output += String.fromCharCode( 0xD800 + (sourceValue >> 10) );
|
350 | output += String.fromCharCode( 0xDC00 + (sourceValue & 0x3FF) );
|
351 | } else throw new Error(this.errors.OUT_OF_UNICODE);
|
352 | }
|
353 | return output;
|
354 | };
|
355 |
|
356 | var strToBufDefaults = {
|
357 | defaultCode: 0x3F
|
358 | };
|
359 |
|
360 | singlebyte.prototype.strToBuf = function(str, encoding, encodingOptions){
|
361 | if( Buffer.isEncoding(encoding) ){
|
362 | return new Buffer(str, encoding);
|
363 | }
|
364 | str = '' + str;
|
365 | var options = extend({}, strToBufDefaults, encodingOptions);
|
366 | var table = this.getEncodingTable(encoding);
|
367 | if( table === null ) throw new Error(this.errors.UNKNOWN_ENCODING);
|
368 | var output = [];
|
369 | for( var i = 0; i < str.length; i++ ){
|
370 | var charUnicode;
|
371 | var thisCharCode = str.charCodeAt(i);
|
372 | if( 0xD800 <= thisCharCode && thisCharCode <= 0xDBFF &&
|
373 | i+1 < str.length
|
374 | ){
|
375 | var nextCharCode = str.charCodeAt(i+1);
|
376 | if( 0xDC00 <= nextCharCode && nextCharCode <= 0xDFFF ){
|
377 | charUnicode = 0x10000 + (thisCharCode - 0xD800)*0x400 +
|
378 | (nextCharCode - 0xDC00);
|
379 | i++;
|
380 | } else {
|
381 | charUnicode = thisCharCode;
|
382 | }
|
383 | } else {
|
384 | charUnicode = thisCharCode;
|
385 | }
|
386 |
|
387 | var codeFoundIndex = table.indexOf(charUnicode);
|
388 | if( codeFoundIndex < 0 ){
|
389 | output.push(options.defaultCode);
|
390 | } else {
|
391 | output.push(codeFoundIndex);
|
392 | }
|
393 | }
|
394 | return new Buffer(output);
|
395 | };
|
396 |
|
397 | singlebyte.prototype.errors = {
|
398 | NOT_A_BUFFER : 'The given source is not a buffer!',
|
399 | UNKNOWN_ENCODING : 'The given encoding is not defined!',
|
400 | INVALID_TABLE_LENGTH : 'The encoding table must have 256 elements!',
|
401 | INVALID_EXTENSION : 'The ASCII extension table must have 128 elements!',
|
402 | BUFFER_ENCODING : "Cannot redefine a Node's encoding!",
|
403 | OUT_OF_UNICODE : "An encoding table's element is greater than 0x10FFFF!"
|
404 | };
|
405 |
|
406 | module.exports = singlebyte();
|