forked from mia/Aegisub
289 lines
10 KiB
C
289 lines
10 KiB
C
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/*
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* Copyright (C) 1999-2001, 2004 Free Software Foundation, Inc.
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* This file is part of the GNU LIBICONV Library.
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*
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* The GNU LIBICONV Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* The GNU LIBICONV Library is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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* If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
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* Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* CP1258
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*/
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#include "flushwc.h"
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#include "vietcomb.h"
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static const unsigned char cp1258_comb_table[] = {
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0xcc, 0xec, 0xde, 0xd2, 0xf2,
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};
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/* The possible bases in viet_comp_table_data:
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0x0041..0x0045, 0x0047..0x0049, 0x004B..0x0050, 0x0052..0x0057,
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0x0059..0x005A, 0x0061..0x0065, 0x0067..0x0069, 0x006B..0x0070,
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0x0072..0x0077, 0x0079..0x007A, 0x00A5, 0x00A8, 0x00C2, 0x00C5..0x00C7,
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0x00CA, 0x00CF, 0x00D3..0x00D4, 0x00D6, 0x00D8, 0x00DA, 0x00DC, 0x00E2,
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0x00E5..0x00E7, 0x00EA, 0x00EF, 0x00F3..0x00F4, 0x00F6, 0x00F8, 0x00FA,
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0x00FC, 0x0102..0x0103, 0x01A0..0x01A1, 0x01AF..0x01B0. */
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static const unsigned int cp1258_comp_bases[] = {
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0x06fdfbbe, 0x06fdfbbe, 0x00000000, 0x00000120, 0x155884e4, 0x155884e4,
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0x0000000c, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00018003
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};
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static const unsigned short cp1258_2uni[128] = {
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/* 0x80 */
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0x20ac, 0xfffd, 0x201a, 0x0192, 0x201e, 0x2026, 0x2020, 0x2021,
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0x02c6, 0x2030, 0xfffd, 0x2039, 0x0152, 0xfffd, 0xfffd, 0xfffd,
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/* 0x90 */
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0xfffd, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
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0x02dc, 0x2122, 0xfffd, 0x203a, 0x0153, 0xfffd, 0xfffd, 0x0178,
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/* 0xa0 */
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0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
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0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
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/* 0xb0 */
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0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
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0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
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/* 0xc0 */
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0x00c0, 0x00c1, 0x00c2, 0x0102, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
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0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x0300, 0x00cd, 0x00ce, 0x00cf,
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/* 0xd0 */
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0x0110, 0x00d1, 0x0309, 0x00d3, 0x00d4, 0x01a0, 0x00d6, 0x00d7,
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0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x01af, 0x0303, 0x00df,
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/* 0xe0 */
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0x00e0, 0x00e1, 0x00e2, 0x0103, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
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0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x0301, 0x00ed, 0x00ee, 0x00ef,
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/* 0xf0 */
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0x0111, 0x00f1, 0x0323, 0x00f3, 0x00f4, 0x01a1, 0x00f6, 0x00f7,
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0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x01b0, 0x20ab, 0x00ff,
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};
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/* In the CP1258 to Unicode direction, the state contains a buffered
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character, or 0 if none. */
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static int
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cp1258_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
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{
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unsigned char c = *s;
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unsigned short wc;
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unsigned short last_wc;
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if (c < 0x80) {
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wc = c;
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} else {
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wc = cp1258_2uni[c-0x80];
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if (wc == 0xfffd)
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return RET_ILSEQ;
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}
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last_wc = conv->istate;
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if (last_wc) {
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if (wc >= 0x0300 && wc < 0x0340) {
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/* See whether last_wc and wc can be combined. */
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unsigned int k;
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unsigned int i1, i2;
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switch (wc) {
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case 0x0300: k = 0; break;
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case 0x0301: k = 1; break;
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case 0x0303: k = 2; break;
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case 0x0309: k = 3; break;
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case 0x0323: k = 4; break;
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default: abort();
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}
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i1 = viet_comp_table[k].idx;
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i2 = i1 + viet_comp_table[k].len-1;
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if (last_wc >= viet_comp_table_data[i1].base
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&& last_wc <= viet_comp_table_data[i2].base) {
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unsigned int i;
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for (;;) {
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i = (i1+i2)>>1;
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if (last_wc == viet_comp_table_data[i].base)
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break;
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if (last_wc < viet_comp_table_data[i].base) {
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if (i1 == i)
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goto not_combining;
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i2 = i;
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} else {
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if (i1 != i)
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i1 = i;
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else {
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i = i2;
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if (last_wc == viet_comp_table_data[i].base)
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break;
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goto not_combining;
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}
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}
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}
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last_wc = viet_comp_table_data[i].composed;
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/* Output the combined character. */
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conv->istate = 0;
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*pwc = (ucs4_t) last_wc;
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return 1;
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}
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}
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not_combining:
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/* Output the buffered character. */
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conv->istate = 0;
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*pwc = (ucs4_t) last_wc;
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return 0; /* Don't advance the input pointer. */
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}
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if (wc >= 0x0041 && wc <= 0x01b0
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&& ((cp1258_comp_bases[(wc - 0x0040) >> 5] >> (wc & 0x1f)) & 1)) {
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/* wc is a possible match in viet_comp_table_data. Buffer it. */
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conv->istate = wc;
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return RET_TOOFEW(1);
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} else {
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/* Output wc immediately. */
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*pwc = (ucs4_t) wc;
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return 1;
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}
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}
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#define cp1258_flushwc normal_flushwc
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static const unsigned char cp1258_page00[88] = {
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0xc0, 0xc1, 0xc2, 0x00, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
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0xc8, 0xc9, 0xca, 0xcb, 0x00, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
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0x00, 0xd1, 0x00, 0xd3, 0xd4, 0x00, 0xd6, 0xd7, /* 0xd0-0xd7 */
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0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0x00, 0x00, 0xdf, /* 0xd8-0xdf */
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0xe0, 0xe1, 0xe2, 0x00, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
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0xe8, 0xe9, 0xea, 0xeb, 0x00, 0xed, 0xee, 0xef, /* 0xe8-0xef */
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0x00, 0xf1, 0x00, 0xf3, 0xf4, 0x00, 0xf6, 0xf7, /* 0xf0-0xf7 */
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0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0x00, 0x00, 0xff, /* 0xf8-0xff */
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/* 0x0100 */
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0x00, 0x00, 0xc3, 0xe3, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
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0xd0, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
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};
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static const unsigned char cp1258_page01[104] = {
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0x00, 0x00, 0x8c, 0x9c, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
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0x9f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
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0x00, 0x00, 0x83, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
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0xd5, 0xf5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdd, /* 0xa8-0xaf */
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0xfd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
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};
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static const unsigned char cp1258_page02[32] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, /* 0xc0-0xc7 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
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0x00, 0x00, 0x00, 0x00, 0x98, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
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};
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static const unsigned char cp1258_page03[40] = {
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0xcc, 0xec, 0x00, 0xde, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
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0x00, 0xd2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
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0x00, 0x00, 0x00, 0xf2, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
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};
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static const unsigned char cp1258_page20[48] = {
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0x00, 0x00, 0x00, 0x96, 0x97, 0x00, 0x00, 0x00, /* 0x10-0x17 */
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0x91, 0x92, 0x82, 0x00, 0x93, 0x94, 0x84, 0x00, /* 0x18-0x1f */
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0x86, 0x87, 0x95, 0x00, 0x00, 0x00, 0x85, 0x00, /* 0x20-0x27 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
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0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
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0x00, 0x8b, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
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};
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static int
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cp1258_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
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{
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unsigned char c = 0;
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if (wc < 0x0080) {
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*r = wc;
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return 1;
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}
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else if (wc >= 0x00a0 && wc < 0x00c0)
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c = wc;
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else if (wc >= 0x00c0 && wc < 0x0118)
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c = cp1258_page00[wc-0x00c0];
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else if (wc >= 0x0150 && wc < 0x01b8)
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c = cp1258_page01[wc-0x0150];
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else if (wc >= 0x02c0 && wc < 0x02e0)
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c = cp1258_page02[wc-0x02c0];
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else if (wc >= 0x0300 && wc < 0x0328)
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c = cp1258_page03[wc-0x0300];
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else if (wc >= 0x0340 && wc < 0x0342) /* deprecated Vietnamese tone marks */
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c = cp1258_page03[wc-0x0340];
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else if (wc >= 0x2010 && wc < 0x2040)
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c = cp1258_page20[wc-0x2010];
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else if (wc == 0x20ab)
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c = 0xfe;
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else if (wc == 0x20ac)
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c = 0x80;
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else if (wc == 0x2122)
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c = 0x99;
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if (c != 0) {
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*r = c;
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return 1;
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}
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/* Try canonical decomposition. */
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{
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/* Binary search through viet_decomp_table. */
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unsigned int i1 = 0;
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unsigned int i2 = sizeof(viet_decomp_table)/sizeof(viet_decomp_table[0])-1;
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if (wc >= viet_decomp_table[i1].composed
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&& wc <= viet_decomp_table[i2].composed) {
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unsigned int i;
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for (;;) {
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/* Here i2 - i1 > 0. */
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i = (i1+i2)>>1;
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if (wc == viet_decomp_table[i].composed)
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break;
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if (wc < viet_decomp_table[i].composed) {
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if (i1 == i)
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return RET_ILUNI;
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/* Here i1 < i < i2. */
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i2 = i;
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} else {
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/* Here i1 <= i < i2. */
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if (i1 != i)
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i1 = i;
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else {
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/* Here i2 - i1 = 1. */
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i = i2;
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if (wc == viet_decomp_table[i].composed)
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break;
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else
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return RET_ILUNI;
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}
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}
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}
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/* Found a canonical decomposition. */
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wc = viet_decomp_table[i].base;
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/* wc is one of 0x0020, 0x0041..0x005a, 0x0061..0x007a, 0x00a5, 0x00a8,
|
||
|
|
0x00c2, 0x00c5..0x00c7, 0x00ca, 0x00cf, 0x00d3, 0x00d4, 0x00d6,
|
||
|
|
0x00d8, 0x00da, 0x00dc, 0x00e2, 0x00e5..0x00e7, 0x00ea, 0x00ef,
|
||
|
|
0x00f3, 0x00f4, 0x00f6, 0x00f8, 0x00fc, 0x0102, 0x0103, 0x01a0,
|
||
|
|
0x01a1, 0x01af, 0x01b0. */
|
||
|
|
if (wc < 0x0100)
|
||
|
|
c = wc;
|
||
|
|
else if (wc < 0x0118)
|
||
|
|
c = cp1258_page00[wc-0x00c0];
|
||
|
|
else
|
||
|
|
c = cp1258_page01[wc-0x0150];
|
||
|
|
if (n < 2)
|
||
|
|
return RET_TOOSMALL;
|
||
|
|
r[0] = c;
|
||
|
|
r[1] = cp1258_comb_table[viet_decomp_table[i].comb1];
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return RET_ILUNI;
|
||
|
|
}
|