mbfilter_iso2022jp_2004.c [plain text]
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_iso2022jp_2004.h"
#include "mbfilter_sjis_2004.h"
#include "unicode_table_jis2004.h"
#include "unicode_table_jis.h"
extern int mbfl_filt_conv_any_jis_flush(mbfl_convert_filter *filter);
static int mbfl_filt_ident_2022jp_2004(int c, mbfl_identify_filter *filter);
const mbfl_encoding mbfl_encoding_2022jp_2004 = {
mbfl_no_encoding_2022jp_2004,
"ISO-2022-JP-2004",
"ISO-2022-JP-2004",
NULL,
NULL,
MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_SHFTCODE | MBFL_ENCTYPE_GL_UNSAFE
};
const struct mbfl_identify_vtbl vtbl_identify_2022jp_2004 = {
mbfl_no_encoding_2022jp_2004,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_2022jp_2004
};
const struct mbfl_convert_vtbl vtbl_2022jp_2004_wchar = {
mbfl_no_encoding_2022jp_2004,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_jis2004_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_2022jp_2004 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_2022jp_2004,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_jis2004,
mbfl_filt_conv_jis2004_flush
};
static int mbfl_filt_ident_2022jp_2004(int c, mbfl_identify_filter *filter)
{
retry:
switch (filter->status & 0xf) {
case 0:
if (c == 0x1b) {
filter->status += 2;
} else if (filter->status == 0x80 && c > 0x20 && c < 0x7f) {
filter->status += 1;
} else if (c >= 0 && c < 0x80) {
;
} else {
filter->flag = 1;
}
break;
case 1:
if (c == 0x1b) {
filter->status++;
} else {
filter->status &= ~0xf;
if (c < 0x21 || c > 0x7e) {
filter->flag = 1;
}
}
break;
case 2:
if (c == 0x24) {
filter->status++;
} else if (c == 0x28) {
filter->status += 3;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
case 3:
if (c == 0x42) {
filter->status = 0x80;
} else if (c == 0x28) {
filter->status++;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
case 4:
if (c == 0x51) {
filter->status = 0x90;
} else if (c == 0x50) {
filter->status = 0xa0;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
case 5:
if (c == 0x42) {
filter->status = 0;
} else {
filter->flag = 1;
filter->status &= ~0xf;
goto retry;
}
break;
default:
filter->status = 0;
break;
}
return c;
}