Header And Logo
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#include "postgres_fe.h"#include "mb/pg_wchar.h"
Go to the source code of this file.
Data Structures | |
| struct | codes_t |
Functions | |
| static unsigned short | BinarySearchRange (codes_t *array, int high, unsigned short code) |
| unsigned short | BIG5toCNS (unsigned short big5, unsigned char *lc) |
| unsigned short | CNStoBIG5 (unsigned short cns, unsigned char lc) |
Variables | |
| static codes_t | big5Level1ToCnsPlane1 [25] |
| static codes_t | cnsPlane1ToBig5Level1 [26] |
| static codes_t | big5Level2ToCnsPlane2 [48] |
| static codes_t | cnsPlane2ToBig5Level2 [49] |
| static unsigned short | b1c4 [][2] |
| static unsigned short | b2c3 [][2] |
| unsigned short BIG5toCNS | ( | unsigned short | big5, | |
| unsigned char * | lc | |||
| ) |
Definition at line 292 of file big5.c.
References b1c4, b2c3, BinarySearchRange(), i, and LC_CNS11643_1.
Referenced by big52mic().
{
unsigned short cns = 0;
int i;
if (big5 < 0xc940U)
{
/* level 1 */
for (i = 0; i < sizeof(b1c4) / (sizeof(unsigned short) * 2); i++)
{
if (b1c4[i][0] == big5)
{
*lc = LC_CNS11643_4;
return (b1c4[i][1] | 0x8080U);
}
}
if (0 < (cns = BinarySearchRange(big5Level1ToCnsPlane1, 23, big5)))
*lc = LC_CNS11643_1;
}
else if (big5 == 0xc94aU)
{
/* level 2 */
*lc = LC_CNS11643_1;
cns = 0x4442;
}
else
{
/* level 2 */
for (i = 0; i < sizeof(b2c3) / (sizeof(unsigned short) * 2); i++)
{
if (b2c3[i][0] == big5)
{
*lc = LC_CNS11643_3;
return (b2c3[i][1] | 0x8080U);
}
}
if (0 < (cns = BinarySearchRange(big5Level2ToCnsPlane2, 46, big5)))
*lc = LC_CNS11643_2;
}
if (0 == cns)
{ /* no mapping Big5 to CNS 11643-1992 */
*lc = 0;
return (unsigned short) '?';
}
return cns | 0x8080;
}
| static unsigned short BinarySearchRange | ( | codes_t * | array, | |
| int | high, | |||
| unsigned short | code | |||
| ) | [static] |
Definition at line 208 of file big5.c.
References codes_t::code, and codes_t::peer.
Referenced by BIG5toCNS(), and CNStoBIG5().
{
int low,
mid,
distance,
tmp;
low = 0;
mid = high >> 1;
for (; low <= high; mid = (low + high) >> 1)
{
if ((array[mid].code <= code) && (array[mid + 1].code > code))
{
if (0 == array[mid].peer)
return 0;
if (code >= 0xa140U)
{
/* big5 to cns */
tmp = ((code & 0xff00) - (array[mid].code & 0xff00)) >> 8;
high = code & 0x00ff;
low = array[mid].code & 0x00ff;
/*
* NOTE: big5 high_byte: 0xa1-0xfe, low_byte: 0x40-0x7e,
* 0xa1-0xfe (radicals: 0x00-0x3e, 0x3f-0x9c) big5 radix is
* 0x9d. [region_low, region_high] We
* should remember big5 has two different regions (above).
* There is a bias for the distance between these regions.
* 0xa1 - 0x7e + bias = 1 (Distance between 0xa1 and 0x7e is
* 1.) bias = - 0x22.
*/
distance = tmp * 0x9d + high - low +
(high >= 0xa1 ? (low >= 0xa1 ? 0 : -0x22)
: (low >= 0xa1 ? +0x22 : 0));
/*
* NOTE: we have to convert the distance into a code point.
* The code point's low_byte is 0x21 plus mod_0x5e. In the
* first, we extract the mod_0x5e of the starting code point,
* subtracting 0x21, and add distance to it. Then we calculate
* again mod_0x5e of them, and restore the final codepoint,
* adding 0x21.
*/
tmp = (array[mid].peer & 0x00ff) + distance - 0x21;
tmp = (array[mid].peer & 0xff00) + ((tmp / 0x5e) << 8)
+ 0x21 + tmp % 0x5e;
return tmp;
}
else
{
/* cns to big5 */
tmp = ((code & 0xff00) - (array[mid].code & 0xff00)) >> 8;
/*
* NOTE: ISO charsets ranges between 0x21-0xfe (94charset).
* Its radix is 0x5e. But there is no distance bias like big5.
*/
distance = tmp * 0x5e
+ ((int) (code & 0x00ff) - (int) (array[mid].code & 0x00ff));
/*
* NOTE: Similar to big5 to cns conversion, we extract
* mod_0x9d and restore mod_0x9d into a code point.
*/
low = array[mid].peer & 0x00ff;
tmp = low + distance - (low >= 0xa1 ? 0x62 : 0x40);
low = tmp % 0x9d;
tmp = (array[mid].peer & 0xff00) + ((tmp / 0x9d) << 8)
+ (low > 0x3e ? 0x62 : 0x40) + low;
return tmp;
}
}
else if (array[mid].code > code)
high = mid - 1;
else
low = mid + 1;
}
return 0;
}
| unsigned short CNStoBIG5 | ( | unsigned short | cns, | |
| unsigned char | lc | |||
| ) |
Definition at line 345 of file big5.c.
References b1c4, b2c3, BinarySearchRange(), i, LC_CNS11643_1, LC_CNS11643_2, LC_CNS11643_3, and LC_CNS11643_4.
Referenced by mic2big5().
{
int i;
unsigned int big5 = 0;
cns &= 0x7f7f;
switch (lc)
{
case LC_CNS11643_1:
big5 = BinarySearchRange(cnsPlane1ToBig5Level1, 24, cns);
break;
case LC_CNS11643_2:
big5 = BinarySearchRange(cnsPlane2ToBig5Level2, 47, cns);
break;
case LC_CNS11643_3:
for (i = 0; i < sizeof(b2c3) / (sizeof(unsigned short) * 2); i++)
{
if (b2c3[i][1] == cns)
return (b2c3[i][0]);
}
break;
case LC_CNS11643_4:
for (i = 0; i < sizeof(b1c4) / (sizeof(unsigned short) * 2); i++)
{
if (b1c4[i][1] == cns)
return (b1c4[i][0]);
}
default:
break;
}
return big5;
}
unsigned short b1c4[][2] [static] |
{
{0xC879, 0x2123},
{0xC87B, 0x2124},
{0xC87D, 0x212A},
{0xC8A2, 0x2152}
}
Definition at line 189 of file big5.c.
Referenced by BIG5toCNS(), and CNStoBIG5().
unsigned short b2c3[][2] [static] |
{
{0xF9D6, 0x4337},
{0xF9D7, 0x4F50},
{0xF9D8, 0x444E},
{0xF9D9, 0x504A},
{0xF9DA, 0x2C5D},
{0xF9DB, 0x3D7E},
{0xF9DC, 0x4B5C}
}
Definition at line 197 of file big5.c.
Referenced by BIG5toCNS(), and CNStoBIG5().
codes_t big5Level1ToCnsPlane1[25] [static] |
{
{0xA140, 0x2121},
{0xA1F6, 0x2258},
{0xA1F7, 0x2257},
{0xA1F8, 0x2259},
{0xA2AF, 0x2421},
{0xA3C0, 0x4221},
{0xa3e1, 0x0000},
{0xA440, 0x4421},
{0xACFE, 0x5753},
{0xacff, 0x0000},
{0xAD40, 0x5323},
{0xAFD0, 0x5754},
{0xBBC8, 0x6B51},
{0xBE52, 0x6B50},
{0xBE53, 0x6F5C},
{0xC1AB, 0x7536},
{0xC2CB, 0x7535},
{0xC2CC, 0x7737},
{0xC361, 0x782E},
{0xC3B9, 0x7865},
{0xC3BA, 0x7864},
{0xC3BB, 0x7866},
{0xC456, 0x782D},
{0xC457, 0x7962},
{0xc67f, 0x0000}
}
codes_t big5Level2ToCnsPlane2[48] [static] |
codes_t cnsPlane1ToBig5Level1[26] [static] |
{
{0x2121, 0xA140},
{0x2257, 0xA1F7},
{0x2258, 0xA1F6},
{0x2259, 0xA1F8},
{0x234f, 0x0000},
{0x2421, 0xA2AF},
{0x2571, 0x0000},
{0x4221, 0xA3C0},
{0x4242, 0x0000},
{0x4421, 0xA440},
{0x5323, 0xAD40},
{0x5753, 0xACFE},
{0x5754, 0xAFD0},
{0x6B50, 0xBE52},
{0x6B51, 0xBBC8},
{0x6F5C, 0xBE53},
{0x7535, 0xC2CB},
{0x7536, 0xC1AB},
{0x7737, 0xC2CC},
{0x782D, 0xC456},
{0x782E, 0xC361},
{0x7864, 0xC3BA},
{0x7865, 0xC3B9},
{0x7866, 0xC3BB},
{0x7962, 0xC457},
{0x7d4c, 0x0000}
}
codes_t cnsPlane2ToBig5Level2[49] [static] |
1.7.1