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254 lines
7.2 KiB
C
Executable File
254 lines
7.2 KiB
C
Executable File
/**********************************************************************
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utf16_be.c - Oniguruma (regular expression library)
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**********************************************************************/
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/*-
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* Copyright (c) 2002-2005 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "regenc.h"
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#define UTF16_IS_SURROGATE_FIRST(c) (c >= 0xd8 && c <= 0xdb)
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#define UTF16_IS_SURROGATE_SECOND(c) (c >= 0xdc && c <= 0xdf)
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static int EncLen_UTF16[] = {
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
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};
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static int
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utf16be_mbc_enc_len(const UChar* p)
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{
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return EncLen_UTF16[*p];
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}
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static int
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utf16be_is_mbc_newline(const UChar* p, const UChar* end)
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{
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if (p + 1 < end) {
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if (*(p+1) == 0x0a && *p == 0x00)
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return 1;
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}
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return 0;
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}
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static OnigCodePoint
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utf16be_mbc_to_code(const UChar* p, const UChar* end)
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{
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OnigCodePoint code;
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if (UTF16_IS_SURROGATE_FIRST(*p)) {
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code = ((((p[0] - 0xd8) << 2) + ((p[1] & 0xc0) >> 6) + 1) << 16)
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+ ((((p[1] & 0x3f) << 2) + (p[2] - 0xdc)) << 8)
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+ p[3];
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}
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else {
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code = p[0] * 256 + p[1];
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}
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return code;
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}
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static int
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utf16be_code_to_mbclen(OnigCodePoint code)
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{
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return (code > 0xffff ? 4 : 2);
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}
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static int
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utf16be_code_to_mbc(OnigCodePoint code, UChar *buf)
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{
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UChar* p = buf;
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if (code > 0xffff) {
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unsigned int plane, high;
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plane = code >> 16;
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*p++ = (plane >> 2) + 0xd8;
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high = (code & 0xff00) >> 8;
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*p++ = ((plane & 0x03) << 6) + (high >> 2);
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*p++ = (high & 0x02) + 0xdc;
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*p = (UChar )(code & 0xff);
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return 4;
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}
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else {
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*p++ = (UChar )((code & 0xff00) >> 8);
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*p++ = (UChar )(code & 0xff);
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return 2;
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}
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}
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static int
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utf16be_mbc_to_normalize(OnigAmbigType flag, const UChar** pp, const UChar* end,
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UChar* lower)
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{
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const UChar* p = *pp;
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if (*p == 0) {
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p++;
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if (end > p + 2 &&
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(flag & ONIGENC_AMBIGUOUS_MATCH_COMPOUND) != 0 &&
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((*p == 's' && *(p+2) == 's') ||
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((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
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(*p == 'S' && *(p+2) == 'S'))) &&
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*(p+1) == 0) {
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*lower++ = '\0';
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*lower = 0xdf;
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(*pp) += 4;
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return 2;
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}
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*lower++ = '\0';
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if (((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
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ONIGENC_IS_MBC_ASCII(p)) ||
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((flag & ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE) != 0 &&
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!ONIGENC_IS_MBC_ASCII(p))) {
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*lower = ONIGENC_ISO_8859_1_TO_LOWER_CASE(*p);
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}
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else {
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*lower = *p;
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}
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(*pp) += 2;
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return 2; /* return byte length of converted char to lower */
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}
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else {
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int len;
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len = EncLen_UTF16[*p];
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if (lower != p) {
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int i;
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for (i = 0; i < len; i++) {
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*lower++ = *p++;
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}
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}
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(*pp) += len;
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return len; /* return byte length of converted char to lower */
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}
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}
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static int
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utf16be_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
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{
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const UChar* p = *pp;
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(*pp) += EncLen_UTF16[*p];
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if (*p == 0) {
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int c, v;
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p++;
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if ((flag & ONIGENC_AMBIGUOUS_MATCH_COMPOUND) != 0) {
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if (end > p + 2 &&
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((*p == 's' && *(p+2) == 's') ||
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((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
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(*p == 'S' && *(p+2) == 'S'))) &&
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*(p+1) == 0) {
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(*pp) += 2;
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return TRUE;
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}
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else if (*p == 0xdf) {
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return TRUE;
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}
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}
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if (((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
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ONIGENC_IS_MBC_ASCII(p)) ||
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((flag & ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE) != 0 &&
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!ONIGENC_IS_MBC_ASCII(p))) {
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c = *p;
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v = ONIGENC_IS_UNICODE_ISO_8859_1_CTYPE(c,
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(ONIGENC_CTYPE_UPPER | ONIGENC_CTYPE_LOWER));
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if ((v | ONIGENC_CTYPE_LOWER) != 0) {
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/* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
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if (c >= 0xaa && c <= 0xba)
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return FALSE;
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else
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return TRUE;
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}
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return (v != 0 ? TRUE : FALSE);
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}
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}
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return FALSE;
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}
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static UChar*
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utf16be_left_adjust_char_head(const UChar* start, const UChar* s)
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{
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if (s <= start) return (UChar* )s;
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if ((s - start) % 2 == 1) {
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s--;
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}
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if (UTF16_IS_SURROGATE_SECOND(*s) && s > start + 1)
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s -= 2;
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return (UChar* )s;
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}
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OnigEncodingType OnigEncodingUTF16_BE = {
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utf16be_mbc_enc_len,
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"UTF-16BE", /* name */
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4, /* max byte length */
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2, /* min byte length */
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(ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE |
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ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE |
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ONIGENC_AMBIGUOUS_MATCH_COMPOUND),
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{
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(OnigCodePoint )'\\' /* esc */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
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},
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utf16be_is_mbc_newline,
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utf16be_mbc_to_code,
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utf16be_code_to_mbclen,
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utf16be_code_to_mbc,
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utf16be_mbc_to_normalize,
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utf16be_is_mbc_ambiguous,
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onigenc_iso_8859_1_get_all_pair_ambig_codes,
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onigenc_ess_tsett_get_all_comp_ambig_codes,
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onigenc_unicode_is_code_ctype,
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onigenc_unicode_get_ctype_code_range,
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utf16be_left_adjust_char_head,
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onigenc_always_false_is_allowed_reverse_match
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};
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