mirror of https://github.com/odrling/Aegisub
311 lines
9.6 KiB
C
311 lines
9.6 KiB
C
/*
|
|
* Copyright (C) 1999-2002 Free Software Foundation, Inc.
|
|
* This file is part of the GNU LIBICONV Library.
|
|
*
|
|
* The GNU LIBICONV Library is free software; you can redistribute it
|
|
* and/or modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* The GNU LIBICONV Library is distributed in the hope that it will be
|
|
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
|
|
* If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/*
|
|
* SHIFT_JISX0213
|
|
*/
|
|
|
|
/* The structure of Shift_JISX0213 is as follows:
|
|
|
|
0x00..0x7F: ISO646-JP, an ASCII variant
|
|
|
|
0x{A1..DF}: JISX0201 Katakana.
|
|
|
|
0x{81..9F,E0..EF}{40..7E,80..FC}: JISX0213 plane 1.
|
|
|
|
0x{F0..FC}{40..7E,80..FC}: JISX0213 plane 2, with irregular row mapping.
|
|
|
|
Note that some JISX0213 characters are not contained in Unicode 3.2
|
|
and are therefore best represented as sequences of Unicode characters.
|
|
*/
|
|
|
|
#include "jisx0213.h"
|
|
#include "flushwc.h"
|
|
|
|
static int
|
|
shift_jisx0213_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
|
|
{
|
|
ucs4_t last_wc = conv->istate;
|
|
if (last_wc) {
|
|
/* Output the buffered character. */
|
|
conv->istate = 0;
|
|
*pwc = last_wc;
|
|
return 0; /* Don't advance the input pointer. */
|
|
} else {
|
|
unsigned char c = *s;
|
|
if (c < 0x80) {
|
|
/* Plain ISO646-JP character. */
|
|
if (c == 0x5c)
|
|
*pwc = (ucs4_t) 0x00a5;
|
|
else if (c == 0x7e)
|
|
*pwc = (ucs4_t) 0x203e;
|
|
else
|
|
*pwc = (ucs4_t) c;
|
|
return 1;
|
|
} else if (c >= 0xa1 && c <= 0xdf) {
|
|
*pwc = c + 0xfec0;
|
|
return 1;
|
|
} else {
|
|
if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc)) {
|
|
/* Two byte character. */
|
|
if (n >= 2) {
|
|
unsigned char c2 = s[1];
|
|
if ((c2 >= 0x40 && c2 <= 0x7e) || (c2 >= 0x80 && c2 <= 0xfc)) {
|
|
unsigned int c1;
|
|
ucs4_t wc;
|
|
/* Convert to row and column. */
|
|
if (c < 0xe0)
|
|
c -= 0x81;
|
|
else
|
|
c -= 0xc1;
|
|
if (c2 < 0x80)
|
|
c2 -= 0x40;
|
|
else
|
|
c2 -= 0x41;
|
|
/* Now 0 <= c <= 0x3b, 0 <= c2 <= 0xbb. */
|
|
c1 = 2 * c;
|
|
if (c2 >= 0x5e)
|
|
c2 -= 0x5e, c1++;
|
|
c2 += 0x21;
|
|
if (c1 >= 0x5e) {
|
|
/* Handling of JISX 0213 plane 2 rows. */
|
|
if (c1 >= 0x67)
|
|
c1 += 230;
|
|
else if (c1 >= 0x63 || c1 == 0x5f)
|
|
c1 += 168;
|
|
else
|
|
c1 += 162;
|
|
}
|
|
wc = jisx0213_to_ucs4(0x121+c1,c2);
|
|
if (wc) {
|
|
if (wc < 0x80) {
|
|
/* It's a combining character. */
|
|
ucs4_t wc1 = jisx0213_to_ucs_combining[wc - 1][0];
|
|
ucs4_t wc2 = jisx0213_to_ucs_combining[wc - 1][1];
|
|
/* We cannot output two Unicode characters at once. So,
|
|
output the first character and buffer the second one. */
|
|
*pwc = wc1;
|
|
conv->istate = wc2;
|
|
} else
|
|
*pwc = wc;
|
|
return 2;
|
|
}
|
|
}
|
|
} else
|
|
return RET_TOOFEW(0);
|
|
}
|
|
return RET_ILSEQ;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define shift_jisx0213_flushwc normal_flushwc
|
|
|
|
/* Composition tables for each of the relevant combining characters. */
|
|
static const struct { unsigned short base; unsigned short composed; } shift_jisx0213_comp_table_data[] = {
|
|
#define shift_jisx0213_comp_table02e5_idx 0
|
|
#define shift_jisx0213_comp_table02e5_len 1
|
|
{ 0x8684, 0x8685 }, /* 0x12B65 = 0x12B64 U+02E5 */
|
|
#define shift_jisx0213_comp_table02e9_idx (shift_jisx0213_comp_table02e5_idx+shift_jisx0213_comp_table02e5_len)
|
|
#define shift_jisx0213_comp_table02e9_len 1
|
|
{ 0x8680, 0x8686 }, /* 0x12B66 = 0x12B60 U+02E9 */
|
|
#define shift_jisx0213_comp_table0300_idx (shift_jisx0213_comp_table02e9_idx+shift_jisx0213_comp_table02e9_len)
|
|
#define shift_jisx0213_comp_table0300_len 5
|
|
{ 0x857b, 0x8663 }, /* 0x12B44 = 0x1295C U+0300 */
|
|
{ 0x8657, 0x8667 }, /* 0x12B48 = 0x12B38 U+0300 */
|
|
{ 0x8656, 0x8669 }, /* 0x12B4A = 0x12B37 U+0300 */
|
|
{ 0x864f, 0x866b }, /* 0x12B4C = 0x12B30 U+0300 */
|
|
{ 0x8662, 0x866d }, /* 0x12B4E = 0x12B43 U+0300 */
|
|
#define shift_jisx0213_comp_table0301_idx (shift_jisx0213_comp_table0300_idx+shift_jisx0213_comp_table0300_len)
|
|
#define shift_jisx0213_comp_table0301_len 4
|
|
{ 0x8657, 0x8668 }, /* 0x12B49 = 0x12B38 U+0301 */
|
|
{ 0x8656, 0x866a }, /* 0x12B4B = 0x12B37 U+0301 */
|
|
{ 0x864f, 0x866c }, /* 0x12B4D = 0x12B30 U+0301 */
|
|
{ 0x8662, 0x866e }, /* 0x12B4F = 0x12B43 U+0301 */
|
|
#define shift_jisx0213_comp_table309a_idx (shift_jisx0213_comp_table0301_idx+shift_jisx0213_comp_table0301_len)
|
|
#define shift_jisx0213_comp_table309a_len 14
|
|
{ 0x82a9, 0x82f5 }, /* 0x12477 = 0x1242B U+309A */
|
|
{ 0x82ab, 0x82f6 }, /* 0x12478 = 0x1242D U+309A */
|
|
{ 0x82ad, 0x82f7 }, /* 0x12479 = 0x1242F U+309A */
|
|
{ 0x82af, 0x82f8 }, /* 0x1247A = 0x12431 U+309A */
|
|
{ 0x82b1, 0x82f9 }, /* 0x1247B = 0x12433 U+309A */
|
|
{ 0x834a, 0x8397 }, /* 0x12577 = 0x1252B U+309A */
|
|
{ 0x834c, 0x8398 }, /* 0x12578 = 0x1252D U+309A */
|
|
{ 0x834e, 0x8399 }, /* 0x12579 = 0x1252F U+309A */
|
|
{ 0x8350, 0x839a }, /* 0x1257A = 0x12531 U+309A */
|
|
{ 0x8352, 0x839b }, /* 0x1257B = 0x12533 U+309A */
|
|
{ 0x835a, 0x839c }, /* 0x1257C = 0x1253B U+309A */
|
|
{ 0x8363, 0x839d }, /* 0x1257D = 0x12544 U+309A */
|
|
{ 0x8367, 0x839e }, /* 0x1257E = 0x12548 U+309A */
|
|
{ 0x83f3, 0x83f6 }, /* 0x12678 = 0x12675 U+309A */
|
|
};
|
|
|
|
static int
|
|
shift_jisx0213_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
|
|
{
|
|
int count = 0;
|
|
unsigned short lasttwo = conv->ostate;
|
|
|
|
if (lasttwo) {
|
|
/* Attempt to combine the last character with this one. */
|
|
unsigned int idx;
|
|
unsigned int len;
|
|
|
|
if (wc == 0x02e5)
|
|
idx = shift_jisx0213_comp_table02e5_idx,
|
|
len = shift_jisx0213_comp_table02e5_len;
|
|
else if (wc == 0x02e9)
|
|
idx = shift_jisx0213_comp_table02e9_idx,
|
|
len = shift_jisx0213_comp_table02e9_len;
|
|
else if (wc == 0x0300)
|
|
idx = shift_jisx0213_comp_table0300_idx,
|
|
len = shift_jisx0213_comp_table0300_len;
|
|
else if (wc == 0x0301)
|
|
idx = shift_jisx0213_comp_table0301_idx,
|
|
len = shift_jisx0213_comp_table0301_len;
|
|
else if (wc == 0x309a)
|
|
idx = shift_jisx0213_comp_table309a_idx,
|
|
len = shift_jisx0213_comp_table309a_len;
|
|
else
|
|
goto not_combining;
|
|
|
|
do
|
|
if (shift_jisx0213_comp_table_data[idx].base == lasttwo)
|
|
break;
|
|
while (++idx, --len > 0);
|
|
|
|
if (len > 0) {
|
|
/* Output the combined character. */
|
|
if (n >= 2) {
|
|
lasttwo = shift_jisx0213_comp_table_data[idx].composed;
|
|
r[0] = (lasttwo >> 8) & 0xff;
|
|
r[1] = lasttwo & 0xff;
|
|
conv->ostate = 0;
|
|
return 2;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
}
|
|
|
|
not_combining:
|
|
/* Output the buffered character. */
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = (lasttwo >> 8) & 0xff;
|
|
r[1] = lasttwo & 0xff;
|
|
r += 2;
|
|
count = 2;
|
|
}
|
|
|
|
if (wc < 0x80 && wc != 0x5c && wc != 0x7e) {
|
|
/* Plain ISO646-JP character. */
|
|
if (n > count) {
|
|
r[0] = (unsigned char) wc;
|
|
conv->ostate = 0;
|
|
return count+1;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
} else if (wc == 0x00a5) {
|
|
if (n > count) {
|
|
r[0] = 0x5c;
|
|
conv->ostate = 0;
|
|
return count+1;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
} else if (wc == 0x203e) {
|
|
if (n > count) {
|
|
r[0] = 0x7e;
|
|
conv->ostate = 0;
|
|
return count+1;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
} else if (wc >= 0xff61 && wc <= 0xff9f) {
|
|
/* Half-width katakana. */
|
|
if (n > count) {
|
|
r[0] = wc - 0xfec0;
|
|
conv->ostate = 0;
|
|
return count+1;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
} else {
|
|
unsigned int s1, s2;
|
|
unsigned short jch = ucs4_to_jisx0213(wc);
|
|
if (jch != 0) {
|
|
/* Convert it to shifted representation. */
|
|
s1 = jch >> 8;
|
|
s2 = jch & 0x7f;
|
|
s1 -= 0x21;
|
|
s2 -= 0x21;
|
|
if (s1 >= 0x5e) {
|
|
/* Handling of JISX 0213 plane 2 rows. */
|
|
if (s1 >= 0xcd) /* rows 0x26E..0x27E */
|
|
s1 -= 102;
|
|
else if (s1 >= 0x8b || s1 == 0x87) /* rows 0x228, 0x22C..0x22F */
|
|
s1 -= 40;
|
|
else /* rows 0x221, 0x223..0x225 */
|
|
s1 -= 34;
|
|
/* Now 0x5e <= s1 <= 0x77. */
|
|
}
|
|
if (s1 & 1)
|
|
s2 += 0x5e;
|
|
s1 = s1 >> 1;
|
|
if (s1 < 0x1f)
|
|
s1 += 0x81;
|
|
else
|
|
s1 += 0xc1;
|
|
if (s2 < 0x3f)
|
|
s2 += 0x40;
|
|
else
|
|
s2 += 0x41;
|
|
if (jch & 0x0080) {
|
|
/* A possible match in comp_table_data. We have to buffer it. */
|
|
/* We know it's a JISX 0213 plane 1 character. */
|
|
if (jch & 0x8000) abort();
|
|
conv->ostate = (s1 << 8) | s2;
|
|
return count+0;
|
|
}
|
|
/* Output the shifted representation. */
|
|
if (n >= count+2) {
|
|
r[0] = s1;
|
|
r[1] = s2;
|
|
conv->ostate = 0;
|
|
return count+2;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
}
|
|
return RET_ILUNI;
|
|
}
|
|
}
|
|
|
|
static int
|
|
shift_jisx0213_reset (conv_t conv, unsigned char *r, int n)
|
|
{
|
|
state_t lasttwo = conv->ostate;
|
|
|
|
if (lasttwo) {
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = (lasttwo >> 8) & 0xff;
|
|
r[1] = lasttwo & 0xff;
|
|
/* conv->ostate = 0; will be done by the caller */
|
|
return 2;
|
|
} else
|
|
return 0;
|
|
}
|