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/*
* Unicode Conversion Library (EUC-JP to UTF-16)
* 1997-2004 by yoshidam
*
*/
#ifdef USE_EUC
#include <string.h>
#include "uconv.h"
#include "e2u.h"
#include "hojo2u.h"
#include "ustring.h"
#define REPLACEMENT_CHAR '?'
static unsigned long
call_unknown_e_conv(UString* u,
unknown_euc unknown_e_conv,
const unsigned char* e, int len) {
VALUE ret;
unsigned char ue[4];
int i;
if (unknown_e_conv == NULL)
return REPLACEMENT_CHAR;
for (i = 0; i < len && i < sizeof(ue) - 1; i++)
ue[i] = e[i];
ue[i] = '\0';
ret = unknown_e_conv(ue);
if (TYPE(ret) != T_FIXNUM) {
UStr_free(u);
rb_exc_raise(ret);
}
return FIX2INT(ret);
}
static void
append_uchar(UString* u, unsigned long ec) {
if (ec >= 0x10000) {
unsigned int high = ((ec - 0x10000) >> 10) | 0xd800;
unsigned int low = (ec & 1023) | 0xdc00;
UStr_addChar4(u, high & 0xff, high >> 8, low & 0xff, low >> 8);
}
else
UStr_addChar2(u, ec & 0xff, ec >> 8);
}
int
e2u_conv2(const unsigned char* e, UString* u,
unknown_euc unknown_e_conv,
unknown_euc e2u_hook) {
int i;
int len = strlen((char*)e);
UStr_alloc(u);
for (i = 0; i < len; i++) {
unsigned long ec = 0;
int clen = 0;
if (e2u_hook != NULL) {
VALUE ret;
unsigned char estr[4];
if (e[i] == 0x8e && i < len - 1) { /* JIS X 0201 kana */
estr[0] = e[i]; estr[1] = e[i+1]; estr[2] = '\0';
clen = 1;
}
else if (e[i] == 0x8f && i < len - 2) { /* JIS X 0212 */
estr[0] = e[i]; estr[1] = e[i+1]; estr[2] = e[i+2]; estr[3] = '\0';
clen = 2;
}
else if (e[i] >= 0xa0 && e[i] != 0xff && i < len - 1) { /* JIX X 0208 */
estr[0] = e[i]; estr[1] = e[i+1]; estr[2] = '\0';
clen = 1;
}
else { /* ASCII or C1 */
estr[0] = e[i]; estr[1] = '\0';
}
if ((ret = e2u_hook(estr)) != Qnil) {
if (TYPE(ret) != T_FIXNUM) {
UStr_free(u);
rb_exc_raise(ret);
}
ec = FIX2INT(ret);
if (ec == 0)
ec = call_unknown_e_conv(u, unknown_e_conv, e + i, clen + 1);
append_uchar(u, ec);
i += clen;
continue;
}
}
clen = 0;
if (e[i] == 0x8e && i < len - 1) { /* JIS X 0201 kana */
if (e[i + 1] >= 0xa1 && e[i + 1] <= 0xdf)
ec = 0xff00 | (e[i + 1] - 0x40);
clen = 1;
}
else if (e[i] == 0x8f && i < len - 2) { /* JIS X 0212 */
int hi = e[i + 1] & 0x7f;
int low = e[i + 2] & 0x7f;
int key = (hi - 32) * 96 + (low - 32);
if (hi >= 32 && low >= 32 &&
key < sizeof(hojo2u_tbl)/sizeof(unsigned short))
ec = hojo2u_tbl[key];
clen = 2;
}
else if (e[i] >= 0xa0 && e[i] != 0xff && i < len - 1) { /* JIX X 0208 */
int hi = e[i] & 0x7f;
int low = e[i + 1] & 0x7f;
int key = (hi - 32) * 96 + (low - 32);
if (hi >= 32 && low >= 32 &&
key < sizeof(e2u_tbl)/sizeof(unsigned short))
ec = e2u_tbl[key];
clen = 1;
}
else if (e[i] < 0xa0) { /* ASCII or C1 */
ec = e[i];
}
if (ec == 0)
ec = call_unknown_e_conv(u, unknown_e_conv, e + i, clen + 1);
append_uchar(u, ec);
i += clen;
}
return u->len;
}
#endif /* USE_EUC */
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