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	nigel	77	/*************************************************
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	ph10	305	Copyright (c) 1997-2008 University of Cambridge
10	nigel	77
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	ph10	200	#ifdef HAVE_CONFIG_H
47	ph10	236	#include "config.h"
48	ph10	200	#endif
49	ph10	199
50	nigel	77	#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	nigel	87	BOOL
68	nigel	77	_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	ph10	349	const ucd_record * prop = GET_UCD(c);
108	nigel	87
109			switch(*data)
110	nigel	77	{
111	nigel	87	case PT_ANY:
112			if (t == XCL_PROP) return !negated;
113			break;
114
115			case PT_LAMP:
116	ph10	349	if ((prop->chartype == ucp_Lu \|\| prop->chartype == ucp_Ll \|\| prop->chartype == ucp_Lt) ==
117	nigel	87	(t == XCL_PROP)) return !negated;
118			break;
119
120			case PT_GC:
121	ph10	351	if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated;
122	nigel	87	break;
123
124			case PT_PC:
125	ph10	349	if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
126	nigel	87	break;
127
128			case PT_SC:
129	ph10	349	if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
130	nigel	87	break;
131
132			/* This should never occur, but compilers may mutter if there is no
133			default. */
134
135			default:
136			return FALSE;
137	nigel	77	}
138	nigel	87
139			data += 2;
140	nigel	77	}
141			#endif /* SUPPORT_UCP */
142			}
143
144			return negated; /* char did not match */
145			}
146
147			/* End of pcre_xclass.c */
Name	Value
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svn:keywords	"Author Date Id Revision Url"