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287 lines
9.0 KiB
Plaintext
287 lines
9.0 KiB
Plaintext
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/*
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Simplification of Pair Table in JIS X 4051
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1. The Origion Table - in 4.1.3
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In JIS x 4051. The pair table is defined as below
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Class of
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Leading Class of Trailing Char Class
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Char
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1 2 3 4 5 6 7 8 9 10 11 12 13 13 14 14 15 16 17 18 19 20
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* # * #
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1 X X X X X X X X X X X X X X X X X X X X X E
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2 X X X X X X
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3 X X X X X X
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4 X X X X X X
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5 X X X X X X
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6 X X X X X X
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7 X X X X X X X
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8 X X X X X X E
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9 X X X X X X
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10 X X X X X X
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11 X X X X X X
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12 X X X X X X
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13 X X X X X X X
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14 X X X X X X X
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15 X X X X X X X X X
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16 X X X X X X X X
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17 X X X X X E
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18 X X X X X X X X X
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19 X E E E E E X X X X X X X X X X X X E X E E
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20 X X X X X E
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* Same Char
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# Other Char
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2. Simplified by remove the class which we do not care
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However, since we do not care about class 13(Subscript), 14(Ruby),
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19(split line note begin quote), and 20(split line note end quote)
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we can simplify this par table into the following
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Class of
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Leading Class of Trailing Char Class
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Char
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1 2 3 4 5 6 7 8 9 10 11 12 15 16 17 18
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1 X X X X X X X X X X X X X X X X
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2 X X X X X
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3 X X X X X
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4 X X X X X
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5 X X X X X
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6 X X X X X
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7 X X X X X X
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8 X X X X X X
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9 X X X X X
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10 X X X X X
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11 X X X X X
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12 X X X X X
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15 X X X X X X X X
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16 X X X X X X X
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17 X X X X X
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18 X X X X X X X X
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3. Simplified by merged classes
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After the 2 simplification, the pair table have some duplication
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a. class 2, 3, 4, 5, 6, are the same- we can merged them
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b. class 10, 11, 12, 17 are the same- we can merged them
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Class of
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Leading Class of Trailing Char Class
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Char
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1 [a] 7 8 9 [b]15 16 18
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1 X X X X X X X X X
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[a] X
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7 X X
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8 X X
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9 X
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[b] X
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15 X X X X
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16 X X X
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18 X X X X
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4. Now we use one bit to encode weather it is breakable, and use 2 bytes
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for one row, then the bit table will look like:
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18 <- 1
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1 0000 0001 1111 1111 = 0x01FF
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[a] 0000 0000 0000 0010 = 0x0002
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7 0000 0000 0000 0110 = 0x0006
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8 0000 0000 0100 0010 = 0x0042
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9 0000 0000 0000 0010 = 0x0002
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[b] 0000 0000 0000 0010 = 0x0042
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15 0000 0001 0101 0010 = 0x0152
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16 0000 0001 1000 0010 = 0x0182
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17 0000 0001 1100 0010 = 0x01C2
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*/
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static uint16_t gJISx4051SimplifiedPair[9] = {
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0x01FF, 0x0002, 0x0006, 0x0042, 0x0002, 0x0042, 0x0152, 0x0182, 0x01C2
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};
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PRBool XXXX::ClassesToPair(nsJISx4051Cls aCls1, nsJISx4051Cls aCls1)
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{
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NS_ASSERTION( (aCls1 < 9) "invalid class");
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NS_ASSERTION( (aCls2 < 9) "invalid class");
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return ( 0 != (gJISx4051SimplifiedPair[aCls1] & (1L << aCls2) ));
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}
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#define X4051_IS_DIGIT(u) ((0x0030 >= (u)) && ((u) >= 0x0039))
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nsJISx4051Cls XXXX::GetClass(
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PRUnichar aChar, PRUnichar aBefore = 0, PRUnichar aAfter = 0)
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{
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// take care the special case in cls 15
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if( ((0x2C == aChar) || (0x2E == aChar)) &&
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(X4051_IS_DIGIT(aBefore)) && X4051_IS_DIGIT(aAfter)))
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{
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return kJISx4051Cls_15;
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}
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nsJISx4051Cls cls;
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if(gSingle->Lookup(aChar, &cls))
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return cls;
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if(gRange->Lookup(aChar, &cls))
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return cls;
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return kJISx4051Cls_15;
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}
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typedef enum {
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kJISx4051Cls_1 = 0,
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kJISx4051Cls_2 = 1,
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kJISx4051Cls_3 = 1,
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kJISx4051Cls_4 = 1,
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kJISx4051Cls_5 = 1,
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kJISx4051Cls_6 = 1,
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kJISx4051Cls_7 = 2,
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kJISx4051Cls_8 = 3,
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kJISx4051Cls_9 = 4,
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kJISx4051Cls_10 = 5,
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kJISx4051Cls_11 = 5,
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kJISx4051Cls_12 = 5,
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// kJISx4051Cls_13 = 0,
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// kJISx4051Cls_14 = 0,
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kJISx4051Cls_15 = 6,
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kJISx4051Cls_16 = 7,
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kJISx4051Cls_17 = 5,
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kJISx4051Cls_18 = 8,
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// kJISx4051Cls_19 = 0,
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// kJISx4051Cls_20 = 0
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} nsJISx4051Cls;
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// Table 2
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YYYY(kJISx4051Cls_1 , 0x0028),
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YYYY(kJISx4051Cls_1 , 0x005B),
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YYYY(kJISx4051Cls_1 , 0x007B),
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YYYY(kJISx4051Cls_1 , 0x2018),
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YYYY(kJISx4051Cls_1 , 0x201B),
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YYYY(kJISx4051Cls_1 , 0x201C),
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YYYY(kJISx4051Cls_1 , 0x201F),
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YYYY(kJISx4051Cls_1 , 0x3008),
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YYYY(kJISx4051Cls_1 , 0x300A),
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YYYY(kJISx4051Cls_1 , 0x300C),
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YYYY(kJISx4051Cls_1 , 0x300E),
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YYYY(kJISx4051Cls_1 , 0x3010),
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YYYY(kJISx4051Cls_1 , 0x3014),
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YYYY(kJISx4051Cls_1 , 0x3016),
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YYYY(kJISx4051Cls_1 , 0x3018),
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YYYY(kJISx4051Cls_1 , 0x301A),
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YYYY(kJISx4051Cls_1 , 0x301D),
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// Table 3
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YYYY(kJISx4051Cls_2 , 0x0029),
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YYYY(kJISx4051Cls_2 , 0x002C),
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YYYY(kJISx4051Cls_2 , 0x005D),
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YYYY(kJISx4051Cls_2 , 0x007D),
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YYYY(kJISx4051Cls_2 , 0x2019),
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YYYY(kJISx4051Cls_2 , 0x201A),
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YYYY(kJISx4051Cls_2 , 0x201D),
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YYYY(kJISx4051Cls_2 , 0x201E),
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YYYY(kJISx4051Cls_2 , 0x3001),
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YYYY(kJISx4051Cls_2 , 0x3009),
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YYYY(kJISx4051Cls_2 , 0x300B),
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YYYY(kJISx4051Cls_2 , 0x300D),
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YYYY(kJISx4051Cls_2 , 0x300F),
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YYYY(kJISx4051Cls_2 , 0x3011),
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YYYY(kJISx4051Cls_2 , 0x3015),
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YYYY(kJISx4051Cls_2 , 0x3017),
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YYYY(kJISx4051Cls_2 , 0x3019),
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YYYY(kJISx4051Cls_2 , 0x301B),
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YYYY(kJISx4051Cls_2 , 0x301E),
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YYYY(kJISx4051Cls_2 , 0x301F),
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// Table 4
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YYYY(kJISx4051Cls_3 , 0x203C),
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YYYY(kJISx4051Cls_3 , 0x2044),
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YYYY(kJISx4051Cls_3 , 0x301C),
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YYYY(kJISx4051Cls_3 , 0x3041),
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YYYY(kJISx4051Cls_3 , 0x3043),
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YYYY(kJISx4051Cls_3 , 0x3045),
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YYYY(kJISx4051Cls_3 , 0x3047),
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YYYY(kJISx4051Cls_3 , 0x3049),
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YYYY(kJISx4051Cls_3 , 0x3063),
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YYYY(kJISx4051Cls_3 , 0x3083),
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YYYY(kJISx4051Cls_3 , 0x3085),
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YYYY(kJISx4051Cls_3 , 0x3087),
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YYYY(kJISx4051Cls_3 , 0x308E),
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YYYY(kJISx4051Cls_3 , 0x309D),
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YYYY(kJISx4051Cls_3 , 0x309E),
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YYYY(kJISx4051Cls_3 , 0x30A1),
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YYYY(kJISx4051Cls_3 , 0x30A3),
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YYYY(kJISx4051Cls_3 , 0x30A5),
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YYYY(kJISx4051Cls_3 , 0x30A7),
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YYYY(kJISx4051Cls_3 , 0x30A9),
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YYYY(kJISx4051Cls_3 , 0x30C3),
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YYYY(kJISx4051Cls_3 , 0x30E3),
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YYYY(kJISx4051Cls_3 , 0x30E5),
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YYYY(kJISx4051Cls_3 , 0x30E7),
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YYYY(kJISx4051Cls_3 , 0x30EE),
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YYYY(kJISx4051Cls_3 , 0x30F5),
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YYYY(kJISx4051Cls_3 , 0x30F6),
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YYYY(kJISx4051Cls_3 , 0x30FC),
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YYYY(kJISx4051Cls_3 , 0x30FD),
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YYYY(kJISx4051Cls_3 , 0x30FE),
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// Table 5
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YYYY(kJISx4051Cls_4 , 0x0021),
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YYYY(kJISx4051Cls_4 , 0x003F),
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// Table 6
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YYYY(kJISx4051Cls_5 , 0x003A),
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YYYY(kJISx4051Cls_5 , 0x003B),
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YYYY(kJISx4051Cls_5 , 0x30FB),
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// Table 7
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YYYY(kJISx4051Cls_6 , 0x002E),
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YYYY(kJISx4051Cls_6 , 0x3002),
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// Table 8
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YYYY(kJISx4051Cls_7 , 0x2014),
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YYYY(kJISx4051Cls_7 , 0x2024),
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YYYY(kJISx4051Cls_7 , 0x2025),
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YYYY(kJISx4051Cls_7 , 0x2026),
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// Table 9
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YYYY(kJISx4051Cls_8 , 0x0024),
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YYYY(kJISx4051Cls_8 , 0x00A3),
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YYYY(kJISx4051Cls_8 , 0x00A5),
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YYYY(kJISx4051Cls_8 , 0x2116),
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// Table 10
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YYYY(kJISx4051Cls_9 , 0x0025),
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YYYY(kJISx4051Cls_9 , 0x00A2),
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YYYY(kJISx4051Cls_9 , 0x00B0),
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YYYY(kJISx4051Cls_9 , 0x2030),
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YYYY(kJISx4051Cls_9 , 0x2031),
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YYYY(kJISx4051Cls_9 , 0x2032),
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YYYY(kJISx4051Cls_9 , 0x2033),
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// Table 1
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YYYY(kJISx4051Cls_10, 0x3000),
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// Table 1
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ZZZZ(kJISx4051Cls_11, 0x3000),
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