/src/php-src/oniguruma/src/big5.c

Source (jump to first uncovered line)
/**********************************************************************
  big5.c -  Oniguruma (regular expression library)
**********************************************************************/
/*-
 * Copyright (c) 2002-2020  K.Kosako
 * 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"

static const int EncLen_BIG5[] = {
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 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, 1
};

static int
big5_mbc_enc_len(const UChar* p)
{
  return EncLen_BIG5[*p];
}

static int
big5_code_to_mbclen(OnigCodePoint code)
{
  if ((code & (~0xffff)) != 0) return ONIGERR_INVALID_CODE_POINT_VALUE;

  if ((code & 0xff00) != 0) {
    if (EncLen_BIG5[(int )(code >> 8) & 0xff] == 2)
      return 2;
  }
  else {
    if (EncLen_BIG5[(int )(code & 0xff)] == 1)
      return 1;
  }

  return ONIGERR_INVALID_CODE_POINT_VALUE;
}

static int
is_valid_mbc_string(const UChar* p, const UChar* end)
{
  while (p < end) {
    if (*p < 0x80) {
      p++;
    }
    else if (*p < 0xa1) {
      return FALSE;
    }
    else if (*p < 0xff) {
      p++;
      if (p >= end)  return FALSE;
      if (*p < 0x40) return FALSE;
      if (*p > 0x7e && *p < 0xa1) return FALSE;
      if (*p == 0xff) return FALSE;
      p++;
    }
    else
      return FALSE;
  }

  return TRUE;
}

static OnigCodePoint
big5_mbc_to_code(const UChar* p, const UChar* end)
{
  return onigenc_mbn_mbc_to_code(ONIG_ENCODING_BIG5, p, end);
}

static int
big5_code_to_mbc(OnigCodePoint code, UChar *buf)
{
  return onigenc_mb2_code_to_mbc(ONIG_ENCODING_BIG5, code, buf);
}

static int
big5_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end,
                   UChar* lower)
{
  return onigenc_mbn_mbc_case_fold(ONIG_ENCODING_BIG5, flag,
                                   pp, end, lower);
}

static int
big5_is_code_ctype(OnigCodePoint code, unsigned int ctype)
{
  return onigenc_mb2_is_code_ctype(ONIG_ENCODING_BIG5, code, ctype);
}

static const char BIG5_CAN_BE_TRAIL_TABLE[256] = {
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0
};

#define BIG5_ISMB_FIRST(byte)  (EncLen_BIG5[byte] > 1)
#define BIG5_ISMB_TRAIL(byte)  BIG5_CAN_BE_TRAIL_TABLE[(byte)]

static UChar*
big5_left_adjust_char_head(const UChar* start, const UChar* s)
{
  const UChar *p;
  int len;

  if (s <= start) return (UChar* )s;
  p = s;

  if (BIG5_ISMB_TRAIL(*p)) {
    while (p > start) {
      if (! BIG5_ISMB_FIRST(*--p)) {
        p++;
        break;
      }
    }
  }
  len = enclen(ONIG_ENCODING_BIG5, p);
  if (p + len > s) return (UChar* )p;
  p += len;
  return (UChar* )(p + ((s - p) & ~1));
}

static int
big5_is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
{
  const UChar c = *s;

  return (BIG5_ISMB_TRAIL(c) ? FALSE : TRUE);
}

OnigEncodingType OnigEncodingBIG5 = {
  big5_mbc_enc_len,
  "Big5",     /* name */
  2,          /* max enc length */
  1,          /* min enc length */
  onigenc_is_mbc_newline_0x0a,
  big5_mbc_to_code,
  big5_code_to_mbclen,
  big5_code_to_mbc,
  big5_mbc_case_fold,
  onigenc_ascii_apply_all_case_fold,
  onigenc_ascii_get_case_fold_codes_by_str,
  onigenc_minimum_property_name_to_ctype,
  big5_is_code_ctype,
  onigenc_not_support_get_ctype_code_range,
  big5_left_adjust_char_head,
  big5_is_allowed_reverse_match,
  NULL, /* init */
  NULL, /* is_initialized */
  is_valid_mbc_string,
  ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1,
  0, 0
};

Coverage Report

Created: 2022-02-19 20:28

Line	Count	Source (jump to first uncovered line)
1		/**********************************************************************
2		big5.c - Oniguruma (regular expression library)
3		**********************************************************************/
4		/*-
5		* Copyright (c) 2002-2020 K.Kosako
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	0	{
54	0	return EncLen_BIG5[*p];
55	0	}
56
57		static int
58		big5_code_to_mbclen(OnigCodePoint code)
59	0	{
60	0	if ((code & (~0xffff)) != 0) return ONIGERR_INVALID_CODE_POINT_VALUE;
61
62	0	if ((code & 0xff00) != 0) {
63	0	if (EncLen_BIG5[(int )(code >> 8) & 0xff] == 2)
64	0	return 2;
65	0	}
66	0	else {
67	0	if (EncLen_BIG5[(int )(code & 0xff)] == 1)
68	0	return 1;
69	0	}
70
71	0	return ONIGERR_INVALID_CODE_POINT_VALUE;
72	0	}
73
74		static int
75		is_valid_mbc_string(const UChar* p, const UChar* end)
76	0	{
77	0	while (p < end) {
78	0	if (*p < 0x80) {
79	0	p++;
80	0	}
81	0	else if (*p < 0xa1) {
82	0	return FALSE;
83	0	}
84	0	else if (*p < 0xff) {
85	0	p++;
86	0	if (p >= end) return FALSE;
87	0	if (*p < 0x40) return FALSE;
88	0	if (p > 0x7e && p < 0xa1) return FALSE;
89	0	if (*p == 0xff) return FALSE;
90	0	p++;
91	0	}
92	0	else
93	0	return FALSE;
94	0	}
95
96	0	return TRUE;
97	0	}
98
99		static OnigCodePoint
100		big5_mbc_to_code(const UChar* p, const UChar* end)
101	0	{
102	0	return onigenc_mbn_mbc_to_code(ONIG_ENCODING_BIG5, p, end);
103	0	}
104
105		static int
106		big5_code_to_mbc(OnigCodePoint code, UChar *buf)
107	0	{
108	0	return onigenc_mb2_code_to_mbc(ONIG_ENCODING_BIG5, code, buf);
109	0	}
110
111		static int
112		big5_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end,
113		UChar* lower)
114	0	{
115	0	return onigenc_mbn_mbc_case_fold(ONIG_ENCODING_BIG5, flag,
116	0	pp, end, lower);
117	0	}
118
119		static int
120		big5_is_code_ctype(OnigCodePoint code, unsigned int ctype)
121	0	{
122	0	return onigenc_mb2_is_code_ctype(ONIG_ENCODING_BIG5, code, ctype);
123	0	}
124
125		static const char BIG5_CAN_BE_TRAIL_TABLE[256] = {
126		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
127		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
128		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
129		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
130		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
131		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
132		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
133		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
134		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
135		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
136		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
137		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
138		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
139		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
140		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
141		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0
142		};
143
144	0	#define BIG5_ISMB_FIRST(byte) (EncLen_BIG5[byte] > 1)
145	0	#define BIG5_ISMB_TRAIL(byte) BIG5_CAN_BE_TRAIL_TABLE[(byte)]
146
147		static UChar*
148		big5_left_adjust_char_head(const UChar* start, const UChar* s)
149	0	{
150	0	const UChar *p;
151	0	int len;
152
153	0	if (s <= start) return (UChar* )s;
154	0	p = s;
155
156	0	if (BIG5_ISMB_TRAIL(*p)) {
157	0	while (p > start) {
158	0	if (! BIG5_ISMB_FIRST(*--p)) {
159	0	p++;
160	0	break;
161	0	}
162	0	}
163	0	}
164	0	len = enclen(ONIG_ENCODING_BIG5, p);
165	0	if (p + len > s) return (UChar* )p;
166	0	p += len;
167	0	return (UChar* )(p + ((s - p) & ~1));
168	0	}
169
170		static int
171		big5_is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
172	0	{
173	0	const UChar c = *s;
174
175	0	return (BIG5_ISMB_TRAIL(c) ? FALSE : TRUE);
176	0	}
177
178		OnigEncodingType OnigEncodingBIG5 = {
179		big5_mbc_enc_len,
180		"Big5", /* name */
181		2, /* max enc length */
182		1, /* min enc length */
183		onigenc_is_mbc_newline_0x0a,
184		big5_mbc_to_code,
185		big5_code_to_mbclen,
186		big5_code_to_mbc,
187		big5_mbc_case_fold,
188		onigenc_ascii_apply_all_case_fold,
189		onigenc_ascii_get_case_fold_codes_by_str,
190		onigenc_minimum_property_name_to_ctype,
191		big5_is_code_ctype,
192		onigenc_not_support_get_ctype_code_range,
193		big5_left_adjust_char_head,
194		big5_is_allowed_reverse_match,
195		NULL, /* init */
196		NULL, /* is_initialized */
197		is_valid_mbc_string,
198		ENC_FLAG_ASCII_COMPATIBLE\|ENC_FLAG_SKIP_OFFSET_1,
199		0, 0
200		};