Annotation of embedaddon/php/ext/mbstring/oniguruma/enc/big5.c, revision 1.1
1.1 ! misho 1: /**********************************************************************
! 2: big5.c - Oniguruma (regular expression library)
! 3: **********************************************************************/
! 4: /*-
! 5: * Copyright (c) 2002-2005 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include "regenc.h"
! 31:
! 32: static const int EncLen_BIG5[] = {
! 33: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 34: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 35: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 36: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 37: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 38: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 39: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 40: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 41: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 42: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 43: 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
! 44: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
! 45: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
! 46: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
! 47: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
! 48: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
! 49: };
! 50:
! 51: static int
! 52: big5_mbc_enc_len(const UChar* p)
! 53: {
! 54: return EncLen_BIG5[*p];
! 55: }
! 56:
! 57: static OnigCodePoint
! 58: big5_mbc_to_code(const UChar* p, const UChar* end)
! 59: {
! 60: return onigenc_mbn_mbc_to_code(ONIG_ENCODING_BIG5, p, end);
! 61: }
! 62:
! 63: static int
! 64: big5_code_to_mbc(OnigCodePoint code, UChar *buf)
! 65: {
! 66: return onigenc_mb2_code_to_mbc(ONIG_ENCODING_BIG5, code, buf);
! 67: }
! 68:
! 69: static int
! 70: big5_mbc_to_normalize(OnigAmbigType flag, const UChar** pp, const UChar* end,
! 71: UChar* lower)
! 72: {
! 73: return onigenc_mbn_mbc_to_normalize(ONIG_ENCODING_BIG5, flag,
! 74: pp, end, lower);
! 75: }
! 76:
! 77: static int
! 78: big5_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
! 79: {
! 80: return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_BIG5, flag, pp, end);
! 81: }
! 82:
! 83: static int
! 84: big5_is_code_ctype(OnigCodePoint code, unsigned int ctype)
! 85: {
! 86: return onigenc_mb2_is_code_ctype(ONIG_ENCODING_BIG5, code, ctype);
! 87: }
! 88:
! 89: static const char BIG5_CAN_BE_TRAIL_TABLE[256] = {
! 90: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
! 91: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
! 92: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
! 93: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
! 94: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 95: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 96: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 97: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
! 98: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 99: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 100: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 101: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 102: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 103: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 104: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
! 105: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0
! 106: };
! 107:
! 108: #define BIG5_ISMB_FIRST(byte) (EncLen_BIG5[byte] > 1)
! 109: #define BIG5_ISMB_TRAIL(byte) BIG5_CAN_BE_TRAIL_TABLE[(byte)]
! 110:
! 111: static UChar*
! 112: big5_left_adjust_char_head(const UChar* start, const UChar* s)
! 113: {
! 114: const UChar *p;
! 115: int len;
! 116:
! 117: if (s <= start) return (UChar* )s;
! 118: p = s;
! 119:
! 120: if (BIG5_ISMB_TRAIL(*p)) {
! 121: while (p > start) {
! 122: if (! BIG5_ISMB_FIRST(*--p)) {
! 123: p++;
! 124: break;
! 125: }
! 126: }
! 127: }
! 128: len = enc_len(ONIG_ENCODING_BIG5, p);
! 129: if (p + len > s) return (UChar* )p;
! 130: p += len;
! 131: return (UChar* )(p + ((s - p) & ~1));
! 132: }
! 133:
! 134: static int
! 135: big5_is_allowed_reverse_match(const UChar* s, const UChar* end)
! 136: {
! 137: const UChar c = *s;
! 138:
! 139: return (BIG5_ISMB_TRAIL(c) ? FALSE : TRUE);
! 140: }
! 141:
! 142: OnigEncodingType OnigEncodingBIG5 = {
! 143: big5_mbc_enc_len,
! 144: "Big5", /* name */
! 145: 2, /* max enc length */
! 146: 1, /* min enc length */
! 147: ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE,
! 148: {
! 149: (OnigCodePoint )'\\' /* esc */
! 150: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */
! 151: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */
! 152: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
! 153: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
! 154: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
! 155: },
! 156: onigenc_is_mbc_newline_0x0a,
! 157: big5_mbc_to_code,
! 158: onigenc_mb2_code_to_mbclen,
! 159: big5_code_to_mbc,
! 160: big5_mbc_to_normalize,
! 161: big5_is_mbc_ambiguous,
! 162: onigenc_ascii_get_all_pair_ambig_codes,
! 163: onigenc_nothing_get_all_comp_ambig_codes,
! 164: big5_is_code_ctype,
! 165: onigenc_not_support_get_ctype_code_range,
! 166: big5_left_adjust_char_head,
! 167: big5_is_allowed_reverse_match
! 168: };
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