mbfilter_iso2022_kr.c [plain text]
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_iso2022_kr.h"
#include "unicode_table_uhc.h"
static int mbfl_filt_ident_2022kr(int c, mbfl_identify_filter *filter);
const mbfl_encoding mbfl_encoding_2022kr = {
mbfl_no_encoding_2022kr,
"ISO-2022-KR",
"ISO-2022-KR",
NULL,
NULL,
MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_SHFTCODE | MBFL_ENCTYPE_GL_UNSAFE
};
const struct mbfl_identify_vtbl vtbl_identify_2022kr = {
mbfl_no_encoding_2022kr,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_2022kr
};
const struct mbfl_convert_vtbl vtbl_wchar_2022kr = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_2022kr,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_2022kr,
mbfl_filt_conv_any_2022kr_flush
};
const struct mbfl_convert_vtbl vtbl_2022kr_wchar = {
mbfl_no_encoding_2022kr,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_2022kr_wchar,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
int
mbfl_filt_conv_2022kr_wchar(int c, mbfl_convert_filter *filter)
{
int c1, w, flag;
retry:
switch (filter->status & 0xf) {
case 0:
if (c == 0x1b) {
filter->status += 2;
} else if (c == 0x0f) {
filter->status &= ~0xff;
} else if (c == 0x0e) {
filter->status |= 0x10;
} else if ((filter->status & 0x10) != 0 && c > 0x20 && c < 0x7f) {
filter->cache = c;
filter->status += 1;
} else if ((filter->status & 0x10) == 0 && c >= 0 && c < 0x80) {
CK((*filter->output_function)(c, filter->data));
} else {
w = c & MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 1:
filter->status &= ~0xf;
c1 = filter->cache;
flag = 0;
if (c1 > 0x20 && c1 < 0x47) {
flag = 1;
} else if (c1 >= 0x47 && c1 <= 0x7e && c1 != 0x49) {
flag = 2;
}
if (flag > 0 && c > 0x20 && c < 0x7f) {
if (flag == 1){
w = (c1 - 0x21)*190 + (c - 0x41) + 0x80;
if (w >= 0 && w < uhc2_ucs_table_size) {
w = uhc2_ucs_table[w];
} else {
w = 0;
}
} else {
w = (c1 - 0x47)*94 + (c - 0x21);
if (w >= 0 && w < uhc3_ucs_table_size) {
w = uhc3_ucs_table[w];
} else {
w = 0;
}
}
if (w <= 0) {
w = (c1 << 8) | c;
w &= MBFL_WCSPLANE_MASK;
w |= MBFL_WCSPLANE_KSC5601;
}
CK((*filter->output_function)(w, filter->data));
} else if (c == 0x1b) {
filter->status++;
} else if ((c >= 0 && c < 0x21) || c == 0x7f) {
CK((*filter->output_function)(c, filter->data));
} else {
w = (c1 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 2:
if (c == 0x24) {
filter->status++;
} else {
filter->status &= ~0xf;
CK((*filter->output_function)(0x1b, filter->data));
goto retry;
}
break;
case 3:
if (c == 0x29) {
filter->status++;
} else {
filter->status &= ~0xf;
CK((*filter->output_function)(0x1b, filter->data));
CK((*filter->output_function)(0x24, filter->data));
goto retry;
}
break;
case 4:
if (c == 0x43) {
filter->status &= ~0xf;
filter->status |= 0x100;
} else {
filter->status &= ~0xf;
CK((*filter->output_function)(0x1b, filter->data));
CK((*filter->output_function)(0x24, filter->data));
CK((*filter->output_function)(0x29, filter->data));
goto retry;
}
break;
default:
filter->status = 0;
break;
}
return c;
}
int
mbfl_filt_conv_wchar_2022kr(int c, mbfl_convert_filter *filter)
{
int c1, c2, s;
s = 0;
if (c >= ucs_a1_uhc_table_min && c < ucs_a1_uhc_table_max) {
s = ucs_a1_uhc_table[c - ucs_a1_uhc_table_min];
} else if (c >= ucs_a2_uhc_table_min && c < ucs_a2_uhc_table_max) {
s = ucs_a2_uhc_table[c - ucs_a2_uhc_table_min];
} else if (c >= ucs_a3_uhc_table_min && c < ucs_a3_uhc_table_max) {
s = ucs_a3_uhc_table[c - ucs_a3_uhc_table_min];
} else if (c >= ucs_i_uhc_table_min && c < ucs_i_uhc_table_max) {
s = ucs_i_uhc_table[c - ucs_i_uhc_table_min];
} else if (c >= ucs_s_uhc_table_min && c < ucs_s_uhc_table_max) {
s = ucs_s_uhc_table[c - ucs_s_uhc_table_min];
} else if (c >= ucs_r1_uhc_table_min && c < ucs_r1_uhc_table_max) {
s = ucs_r1_uhc_table[c - ucs_r1_uhc_table_min];
} else if (c >= ucs_r2_uhc_table_min && c < ucs_r2_uhc_table_max) {
s = ucs_r2_uhc_table[c - ucs_r2_uhc_table_min];
}
c1 = (s >> 8) & 0xff;
c2 = s & 0xff;
if (c1 < 0xa1 || c2 < 0xa1){
s = c;
}
if (s & 0x8000) {
s -= 0x8080;
}
if (s <= 0) {
c1 = c & ~MBFL_WCSPLANE_MASK;
if (c1 == MBFL_WCSPLANE_KSC5601) {
s = c & MBFL_WCSPLANE_MASK;
}
if (c == 0) {
s = 0;
} else if (s <= 0) {
s = -1;
}
} else if ((s >= 0x80 && s < 0x2121) || (s > 0x8080)) {
s = -1;
}
if (s >= 0) {
if (s < 0x80 && s > 0) {
if ((filter->status & 0x10) != 0) {
CK((*filter->output_function)(0x0f, filter->data));
filter->status &= ~0x10;
}
CK((*filter->output_function)(s, filter->data));
} else {
if ( (filter->status & 0x100) == 0) {
CK((*filter->output_function)(0x1b, filter->data));
CK((*filter->output_function)(0x24, filter->data));
CK((*filter->output_function)(0x29, filter->data));
CK((*filter->output_function)(0x43, filter->data));
filter->status |= 0x100;
}
if ((filter->status & 0x10) == 0) {
CK((*filter->output_function)(0x0e, filter->data));
filter->status |= 0x10;
}
CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
CK((*filter->output_function)(s & 0xff, filter->data));
}
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}
int
mbfl_filt_conv_any_2022kr_flush(mbfl_convert_filter *filter)
{
if ((filter->status & 0xff00) != 0) {
CK((*filter->output_function)(0x0f, filter->data));
}
filter->status &= 0xff;
if (filter->flush_function != NULL) {
return (*filter->flush_function)(filter->data);
}
return 0;
}
static int mbfl_filt_ident_2022kr(int c, mbfl_identify_filter *filter)
{
retry:
switch (filter->status & 0xf) {
case 0:
if (!(filter->status & 0x10)) {
if (c == 0x1b)
filter->status += 2;
} else if (filter->status == 0x20 && c > 0x20 && c < 0x7f) {
filter->status += 1;
} else if (c >= 0 && c < 0x80) {
;
} else {
filter->flag = 1;
}
break;
case 1:
filter->status &= ~0xf;
if (c < 0x21 || c > 0x7e) {
filter->flag = 1;
}
break;
case 2:
if (c == 0x24) {
filter->status++;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
case 3:
if (c == 0x29) {
filter->status++;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
case 5:
if (c == 0x43) {
filter->status = 0x10;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
default:
filter->status = 0;
break;
}
return c;
}