Annotation of win32/pcre/pcre_xclass.c, revision 1.2
1.1 misha 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: {
1.2 ! misha 107: const ucd_record * prop = GET_UCD(c);
1.1 misha 108:
109: switch(*data)
110: {
111: case PT_ANY:
112: if (t == XCL_PROP) return !negated;
113: break;
114:
115: case PT_LAMP:
1.2 ! misha 116: if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll || prop->chartype == ucp_Lt) ==
1.1 misha 117: (t == XCL_PROP)) return !negated;
118: break;
119:
120: case PT_GC:
1.2 ! misha 121: if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated;
1.1 misha 122: break;
123:
124: case PT_PC:
1.2 ! misha 125: if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
1.1 misha 126: break;
127:
128: case PT_SC:
1.2 ! misha 129: if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
1.1 misha 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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