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/* $Id: convert.c 1374 2003-11-27 14:11:40Z victor $ */
#include "bbs.h"
/*
* The following code is copied and modified from "autoconvert" with GPL.
*/
#ifdef GB_CONVERT
#include "convert.h"
char *hzconvert(char *, int *, char *, void (*dbcvrt)());
extern const unsigned char GtoB[], BtoG[];
#define c1 (unsigned char)(s[0])
#define c2 (unsigned char)(s[1])
static void g2b(char *s)
{
unsigned int i;
if ((c1 >= 0x81) && (c1 <= 0xfe) && (c2 >= 0x40) && (c2 <= 0xfe) && (c2 != 0x7f)) {
/*
* c1c2 in the table
*/
if (c2 < 0x7f)
i = ((c1 - 0x81) * 190 + (c2 - 0x40)) * 2;
else
i = ((c1 - 0x81) * 190 + (c2 - 0x41)) * 2;
s[0] = GtoB[i++];
s[1] = GtoB[i];
} else { /* c1c2 not in the table */
if ((char) s[1] >= 0) /* half HANZI-character */
s[0] = '?';
else { /* invalid gbk-character */
s[0] = GtoB_bad1;
s[1] = GtoB_bad2;
}
}
}
static void b2g(char *s)
{
unsigned int i;
if ((c1 >= 0x81) && (c1 <= 0xfe) && (c2 >= 0x40) && (c2 <= 0xfe) && (c2 != 0x7f)) {
/*
* c1c2 in the table
*/
if (c2 < 0x7f)
i = ((c1 - 0x81) * 190 + (c2 - 0x40)) * 2;
else
i = ((c1 - 0x81) * 190 + (c2 - 0x41)) * 2;
s[0] = BtoG[i++];
s[1] = BtoG[i];
} else { /* c1c2 not in the table */
if ((char) s[1] >= 0) /* half HANZI-character */
s[0] = '?';
else { /* invalid big5-character */
s[0] = BtoG_bad1;
s[1] = BtoG_bad2;
}
}
}
unsigned char *gb2big(unsigned char *s, int plen)
{
unsigned char c = 0;
return hzconvert(s, &plen, &c, g2b);
}
unsigned char *big2gb(unsigned char *s, int plen)
{
unsigned char c = 0;
return hzconvert(s, &plen, &c, b2g);
}
#endif
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