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/*
* EUC-JP <=> Unicode translate functions.
* by Hatuka*nezumi - IKEDA Soji <nezumi@jca.apc.org>
*
*/
#include <stdio.h>
#include <string.h>
#include "unicode.h"
extern const unicode_char* jisx0208_to_uni_tbls[];
extern const unicode_char* jisx0212_to_uni_tbls[];
extern const unsigned* uni_to_jisx0208_tbls[];
extern const unsigned* uni_to_jisx0212_tbls[];
static unicode_char *c2u(const struct unicode_info *u,
const char *eucjp_str, int *err)
{
unicode_char *uc=0;
unsigned char hi=0, lo=0;
int len=0;
int i=0;
int pos=0;
if(err) *err = -1;
len = strlen(eucjp_str);
uc = (unicode_char*)malloc((len+1) * sizeof(unicode_char) *2);
if (!uc)
return NULL;
for(i=0; i<len;) {
/* US-ASCII */
if((unsigned char)eucjp_str[i] < 0x80)
{
uc[pos++] = (unicode_char)(eucjp_str[i]);
i++;
}
/* JIS X 0201 GR; SS2 */
else if ((unsigned char)eucjp_str[i] == 0x8e
&& (unsigned char)eucjp_str[i+1] >= 0xa1
&& (unsigned char)eucjp_str[i+1] <= 0xdf)
{
lo = (unsigned char)eucjp_str[i+1];
/* EUCJP -> JIS */
lo -= 0x80;
uc[pos++] = (unicode_char)(lo+(unsigned)0xff40);
i+=2;
}
/* JIS X 0212; SS3 */
else if ((unsigned char)eucjp_str[i] == 0x8f
&& (unsigned char)eucjp_str[i+1] >= 0xa1
&& (unsigned char)eucjp_str[i+2] >= 0xa1)
{
hi = (unsigned char)eucjp_str[i+1];
lo = (unsigned char)eucjp_str[i+2];
/* EUCJP -> JIS */
hi -= 0x80;
lo -= 0x80;
if (jisx0212_to_uni_tbls[hi-0x21] != NULL
&& jisx0212_to_uni_tbls[hi-0x21][lo-0x21] != 0x003f)
uc[pos++] = jisx0212_to_uni_tbls[hi-0x21][lo-0x21];
else if (err)
{
*err = i;
free(uc);
return NULL;
}
else
uc[pos++] = (unicode_char)0xfffd;
i+=3;
}
/* JIS X 0208 */
else if ((unsigned char)eucjp_str[i] >= 0xa1
&& (unsigned char)eucjp_str[i+1] >= 0xa1)
{
hi = (unsigned char)eucjp_str[i];
lo = (unsigned char)eucjp_str[i+1];
/* EUCJP -> JIS */
hi -= 0x80;
lo -= 0x80;
/* JIS -> Unicode */
if (jisx0208_to_uni_tbls[hi-0x21] != NULL
&& jisx0208_to_uni_tbls[hi-0x21][lo-0x21] != 0x003f)
uc[pos++] = jisx0208_to_uni_tbls[hi-0x21][lo-0x21];
else if (err)
{
*err = i;
free(uc);
return NULL;
}
else
uc[pos++] = (unicode_char)0xfffd;
i+=2;
}
/* Not found */
else if (err)
{
*err = i;
free(uc);
return NULL;
}
else
{
uc[pos++] = (unicode_char)0xfffd;
i++;
}
}
uc[pos++] = 0;
return uc;
}
static char *u2c(const struct unicode_info *u,
const unicode_char *str, int *err)
{
int i=0;
int pos=0;
int len=0;
char* s;
if(err) *err = -1;
while(str[len])
len++;
s = malloc((len+1)*2);
if (!s)
return NULL;
for(i=0; str[i]; i++)
{
int jis_char = 0;
unsigned char hi=0, lo=0;
unsigned char str_i_high=str[i] >> 8;
/* EUC-JP is mapped inside BMP range. */
if (str[i] >= (unicode_char)0x10000)
{
if (err)
{
*err = i;
free(s);
return NULL;
}
s[pos++] = '?';
}
/* US-ASCII */
else if (str[i] < (unicode_char)0x0080)
s[pos++] = str[i];
/* For compatibility: 2 characters replaced by JIS X 0201 */
else if (str[i] == (unicode_char)0x00A5) /* YEN SIGN */
s[pos++] = 0x5C;
else if (str[i] == (unicode_char)0x203E) /* OVERLINE */
s[pos++] = 0x7E;
/* JIS X 0201 GR */
else if (str[i] >= (unicode_char)0xff61
&& str[i] <= (unicode_char)0xff9f)
{
lo = (unsigned char)(str[i] - (unsigned)0xff40);
/* JIS -> EUCJP */
lo += 0x80;
s[pos++] = 0x8e;
s[pos++] = lo;
}
/* JIS X 0208 */
else if (uni_to_jisx0208_tbls[str_i_high] != NULL
&& uni_to_jisx0208_tbls[str_i_high][str[i] & 0xff] != 0x003F)
{
/* Unicode -> JIS */
jis_char = uni_to_jisx0208_tbls[str_i_high][str[i] & 0xff];
hi = jis_char >> 8;
lo = jis_char & 0xff;
if (hi)
{
/* JIS -> EUCJP */
hi += 0x80;
lo += 0x80;
s[pos++] = hi;
s[pos++] = lo;
}
else if (err)
{
*err = i;
free(s);
return NULL;
}
else
s[pos++] = '?';
}
/* Otherwise, search on JIS X 0212 */
else if (uni_to_jisx0212_tbls[str_i_high] != NULL
&& uni_to_jisx0212_tbls[str_i_high][str[i] & 0xff] != 0x003F)
{
/* Unicode -> JIS */
jis_char = uni_to_jisx0212_tbls[str_i_high][str[i] & 0xff];
hi = jis_char >> 8;
lo = jis_char & 0xff;
if (hi) {
/* JIS -> EUCJP */
hi += 0x80;
lo += 0x80;
s[pos++] = 0x8f;
s[pos++] = hi;
s[pos++] = lo;
}
else if (err)
{
*err = i;
free(s);
return NULL;
}
else
s[pos++] = '?';
}
/* Not found */
else if (err)
{
*err = i;
free(s);
return NULL;
}
else
s[pos++] = '?';
}
s[pos] = 0;
return s;
}
static char *toupper_func(const struct unicode_info *u,
const char *cp, int *ip)
{
unicode_char *uc = c2u(u, cp, ip);
char *s;
size_t i;
if (!uc)
return (NULL);
for (i=0; uc[i] && i<10000; i++) {
if ((unicode_char)'a' <= uc[i] && uc[i] <= (unicode_char)'z')
uc[i] = uc[i] - ((unicode_char)'a' - (unicode_char)'A');
}
s = u2c(u, uc, NULL);
free(uc);
return (s);
}
static char *tolower_func(const struct unicode_info *u,
const char *cp, int *ip)
{
unicode_char *uc = c2u(u, cp, ip);
char *s;
size_t i;
if (!uc)
return (NULL);
for (i=0; uc[i]; i++) {
if ((unicode_char)'A' <= uc[i] && uc[i] <= (unicode_char)'Z')
uc[i] = uc[i] + ((unicode_char)'a' - (unicode_char)'A');
}
s = u2c(u, uc, NULL);
free(uc);
return (s);
}
static char *totitle_func(const struct unicode_info *u,
const char *cp, int *ip)
{
unicode_char *uc = c2u(u, cp, ip);
char *s;
if (!uc)
return (NULL);
/* Uh, sorry, what's "title" char? */
/*
* for (i=0; uc[i]; i++)
* uc[i] = unicode_tc(uc[i]);
*/
s = u2c(u, uc, NULL);
free(uc);
return (s);
}
extern const struct unicode_info unicode_UTF8;
const struct unicode_info unicode_EUC_JP = {
"EUC-JP",
UNICODE_MB | UNICODE_REPLACEABLE | UNICODE_USASCII |
UNICODE_HEADER_BASE64 | UNICODE_BODY_BASE64,
c2u,
u2c,
toupper_func,
tolower_func,
totitle_func,
&unicode_UTF8
};
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