code/trunk/pcre_xclass.c

/*************************************************
*      Perl-Compatible Regular Expressions       *
*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel
           Copyright (c) 1997-2008 University of Cambridge

-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

    * 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.

    * Neither the name of the University of Cambridge nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
-----------------------------------------------------------------------------
*/


/* This module contains an internal function that is used to match an extended
class (one that contains characters whose values are > 255). It is used by both
pcre_exec() and pcre_def_exec(). */


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "pcre_internal.h"


/*************************************************
*       Match character against an XCLASS        *
*************************************************/

/* This function is called to match a character against an extended class that
might contain values > 255.

Arguments:
  c           the character
  data        points to the flag byte of the XCLASS data

Returns:      TRUE if character matches, else FALSE
*/

BOOL
_pcre_xclass(int c, const uschar *data)
{
int t;
BOOL negated = (*data & XCL_NOT) != 0;

/* Character values < 256 are matched against a bitmap, if one is present. If
not, we still carry on, because there may be ranges that start below 256 in the
additional data. */

if (c < 256)
  {
  if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
    return !negated;   /* char found */
  }

/* First skip the bit map if present. Then match against the list of Unicode
properties or large chars or ranges that end with a large char. We won't ever
encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */

if ((*data++ & XCL_MAP) != 0) data += 32;

while ((t = *data++) != XCL_END)
  {
  int x, y;
  if (t == XCL_SINGLE)
    {
    GETCHARINC(x, data);
    if (c == x) return !negated;
    }
  else if (t == XCL_RANGE)
    {
    GETCHARINC(x, data);
    GETCHARINC(y, data);
    if (c >= x && c <= y) return !negated;
    }

#ifdef SUPPORT_UCP
  else  /* XCL_PROP & XCL_NOTPROP */
    {
    const ucd_record * prop = GET_UCD(c);

    switch(*data)
      {
      case PT_ANY:
      if (t == XCL_PROP) return !negated;
      break;

      case PT_LAMP:
      if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll || prop->chartype == ucp_Lt) ==
          (t == XCL_PROP)) return !negated;
      break;

      case PT_GC:
      if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated;
      break;

      case PT_PC:
      if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
      break;

      case PT_SC:
      if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
      break;

      /* This should never occur, but compilers may mutter if there is no
      default. */

      default:
      return FALSE;
      }

    data += 2;
    }
#endif  /* SUPPORT_UCP */
  }

return negated;   /* char did not match */
}

/* End of pcre_xclass.c */
1	/*************************************************
2	* Perl-Compatible Regular Expressions *
3	*************************************************/
4
5	/* PCRE is a library of functions to support regular expressions whose syntax
6	and semantics are as close as possible to those of the Perl 5 language.
7
8	Written by Philip Hazel
9	Copyright (c) 1997-2008 University of Cambridge
10
11	-----------------------------------------------------------------------------
12	Redistribution and use in source and binary forms, with or without
13	modification, are permitted provided that the following conditions are met:
14
15	* Redistributions of source code must retain the above copyright notice,
16	this list of conditions and the following disclaimer.
17
18	* Redistributions in binary form must reproduce the above copyright
19	notice, this list of conditions and the following disclaimer in the
20	documentation and/or other materials provided with the distribution.
21
22	* Neither the name of the University of Cambridge nor the names of its
23	contributors may be used to endorse or promote products derived from
24	this software without specific prior written permission.
25
26	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29	ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36	POSSIBILITY OF SUCH DAMAGE.
37	-----------------------------------------------------------------------------
38	*/
39
40
41	/* This module contains an internal function that is used to match an extended
42	class (one that contains characters whose values are > 255). It is used by both
43	pcre_exec() and pcre_def_exec(). */
44
45
46	#ifdef HAVE_CONFIG_H
47	#include "config.h"
48	#endif
49
50	#include "pcre_internal.h"
51
52
53	/*************************************************
54	* Match character against an XCLASS *
55	*************************************************/
56
57	/* This function is called to match a character against an extended class that
58	might contain values > 255.
59
60	Arguments:
61	c the character
62	data points to the flag byte of the XCLASS data
63
64	Returns: TRUE if character matches, else FALSE
65	*/
66
67	BOOL
68	_pcre_xclass(int c, const uschar *data)
69	{
70	int t;
71	BOOL negated = (*data & XCL_NOT) != 0;
72
73	/* Character values < 256 are matched against a bitmap, if one is present. If
74	not, we still carry on, because there may be ranges that start below 256 in the
75	additional data. */
76
77	if (c < 256)
78	{
79	if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
80	return !negated; /* char found */
81	}
82
83	/* First skip the bit map if present. Then match against the list of Unicode
84	properties or large chars or ranges that end with a large char. We won't ever
85	encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
86
87	if ((*data++ & XCL_MAP) != 0) data += 32;
88
89	while ((t = *data++) != XCL_END)
90	{
91	int x, y;
92	if (t == XCL_SINGLE)
93	{
94	GETCHARINC(x, data);
95	if (c == x) return !negated;
96	}
97	else if (t == XCL_RANGE)
98	{
99	GETCHARINC(x, data);
100	GETCHARINC(y, data);
101	if (c >= x && c <= y) return !negated;
102	}
103
104	#ifdef SUPPORT_UCP
105	else /* XCL_PROP & XCL_NOTPROP */
106	{
107	const ucd_record * prop = GET_UCD(c);
108
109	switch(*data)
110	{
111	case PT_ANY:
112	if (t == XCL_PROP) return !negated;
113	break;
114
115	case PT_LAMP:
116	if ((prop->chartype == ucp_Lu \|\| prop->chartype == ucp_Ll \|\| prop->chartype == ucp_Lt) ==
117	(t == XCL_PROP)) return !negated;
118	break;
119
120	case PT_GC:
121	if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated;
122	break;
123
124	case PT_PC:
125	if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
126	break;
127
128	case PT_SC:
129	if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
130	break;
131
132	/* This should never occur, but compilers may mutter if there is no
133	default. */
134
135	default:
136	return FALSE;
137	}
138
139	data += 2;
140	}
141	#endif /* SUPPORT_UCP */
142	}
143
144	return negated; /* char did not match */
145	}
146
147	/* End of pcre_xclass.c */
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