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DEFINITIONS
This source file includes following definitions.
- utf16be_mbc_enc_len
- utf16be_is_mbc_newline
- utf16be_mbc_to_code
- utf16be_code_to_mbclen
- utf16be_code_to_mbc
- utf16be_mbc_to_normalize
- utf16be_is_mbc_ambiguous
- utf16be_left_adjust_char_head
/**********************************************************************
utf16_be.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2008 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "regenc.h"
#define UTF16_IS_SURROGATE_FIRST(c) (c >= 0xd8 && c <= 0xdb)
#define UTF16_IS_SURROGATE_SECOND(c) (c >= 0xdc && c <= 0xdf)
static const int EncLen_UTF16[] = {
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
};
static int
utf16be_mbc_enc_len(const UChar* p)
{
return EncLen_UTF16[*p];
}
static int
utf16be_is_mbc_newline(const UChar* p, const UChar* end)
{
if (p + 1 < end) {
if (*(p+1) == 0x0a && *p == 0x00)
return 1;
#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
if ((*(p+1) == 0x0d || *(p+1) == 0x85) && *p == 0x00)
return 1;
if (*p == 0x20 && (*(p+1) == 0x29 || *(p+1) == 0x28))
return 1;
#endif
}
return 0;
}
static OnigCodePoint
utf16be_mbc_to_code(const UChar* p, const UChar* end)
{
OnigCodePoint code;
if (UTF16_IS_SURROGATE_FIRST(*p)) {
code = ((((p[0] - 0xd8) << 2) + ((p[1] & 0xc0) >> 6) + 1) << 16)
+ ((((p[1] & 0x3f) << 2) + (p[2] - 0xdc)) << 8)
+ p[3];
}
else {
code = p[0] * 256 + p[1];
}
return code;
}
static int
utf16be_code_to_mbclen(OnigCodePoint code)
{
return (code > 0xffff ? 4 : 2);
}
static int
utf16be_code_to_mbc(OnigCodePoint code, UChar *buf)
{
UChar* p = buf;
if (code > 0xffff) {
unsigned int plane, high;
plane = code >> 16;
*p++ = (plane >> 2) + 0xd8;
high = (code & 0xff00) >> 8;
*p++ = ((plane & 0x03) << 6) + (high >> 2);
*p++ = (high & 0x02) + 0xdc;
*p = (UChar )(code & 0xff);
return 4;
}
else {
*p++ = (UChar )((code & 0xff00) >> 8);
*p++ = (UChar )(code & 0xff);
return 2;
}
}
static int
utf16be_mbc_to_normalize(OnigAmbigType flag, const UChar** pp, const UChar* end,
UChar* lower)
{
const UChar* p = *pp;
if (*p == 0) {
p++;
if (end > p + 2 &&
(flag & ONIGENC_AMBIGUOUS_MATCH_COMPOUND) != 0 &&
((*p == 's' && *(p+2) == 's') ||
((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
(*p == 'S' && *(p+2) == 'S'))) &&
*(p+1) == 0) {
*lower++ = '\0';
*lower = 0xdf;
(*pp) += 4;
return 2;
}
*lower++ = '\0';
if (((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
ONIGENC_IS_MBC_ASCII(p)) ||
((flag & ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE) != 0 &&
!ONIGENC_IS_MBC_ASCII(p))) {
*lower = ONIGENC_ISO_8859_1_TO_LOWER_CASE(*p);
}
else {
*lower = *p;
}
(*pp) += 2;
return 2; /* return byte length of converted char to lower */
}
else {
int len;
len = EncLen_UTF16[*p];
if (lower != p) {
int i;
for (i = 0; i < len; i++) {
*lower++ = *p++;
}
}
(*pp) += len;
return len; /* return byte length of converted char to lower */
}
}
static int
utf16be_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
{
const UChar* p = *pp;
(*pp) += EncLen_UTF16[*p];
if (*p == 0) {
int c, v;
p++;
if ((flag & ONIGENC_AMBIGUOUS_MATCH_COMPOUND) != 0) {
if (end > p + 2 &&
((*p == 's' && *(p+2) == 's') ||
((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
(*p == 'S' && *(p+2) == 'S'))) &&
*(p+1) == 0) {
(*pp) += 2;
return TRUE;
}
else if (*p == 0xdf) {
return TRUE;
}
}
if (((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0 &&
ONIGENC_IS_MBC_ASCII(p)) ||
((flag & ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE) != 0 &&
!ONIGENC_IS_MBC_ASCII(p))) {
c = *p;
v = ONIGENC_IS_UNICODE_ISO_8859_1_CTYPE(c,
(ONIGENC_CTYPE_UPPER | ONIGENC_CTYPE_LOWER));
if ((v | ONIGENC_CTYPE_LOWER) != 0) {
/* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
if (c >= 0xaa && c <= 0xba)
return FALSE;
else
return TRUE;
}
return (v != 0 ? TRUE : FALSE);
}
}
return FALSE;
}
static UChar*
utf16be_left_adjust_char_head(const UChar* start, const UChar* s)
{
if (s <= start) return (UChar* )s;
if ((s - start) % 2 == 1) {
s--;
}
if (UTF16_IS_SURROGATE_SECOND(*s) && s > start + 1)
s -= 2;
return (UChar* )s;
}
OnigEncodingType OnigEncodingUTF16_BE = {
utf16be_mbc_enc_len,
"UTF-16BE", /* name */
4, /* max byte length */
2, /* min byte length */
(ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE |
ONIGENC_AMBIGUOUS_MATCH_NONASCII_CASE |
ONIGENC_AMBIGUOUS_MATCH_COMPOUND),
{
(OnigCodePoint )'\\' /* esc */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
},
utf16be_is_mbc_newline,
utf16be_mbc_to_code,
utf16be_code_to_mbclen,
utf16be_code_to_mbc,
utf16be_mbc_to_normalize,
utf16be_is_mbc_ambiguous,
onigenc_iso_8859_1_get_all_pair_ambig_codes,
onigenc_ess_tsett_get_all_comp_ambig_codes,
onigenc_unicode_is_code_ctype,
onigenc_unicode_get_ctype_code_range,
utf16be_left_adjust_char_head,
onigenc_always_false_is_allowed_reverse_match
};