Annotation of win32/pcre/pcre_xclass.c, revision 1.8
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
1.6 misha 9: Copyright (c) 1997-2013 University of Cambridge
1.1 misha 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
1.3 misha 42: class. It is used by both pcre_exec() and pcre_def_exec(). */
1.1 misha 43:
44:
45: #ifdef HAVE_CONFIG_H
46: #include "config.h"
47: #endif
48:
49: #include "pcre_internal.h"
50:
51:
52: /*************************************************
53: * Match character against an XCLASS *
54: *************************************************/
55:
56: /* This function is called to match a character against an extended class that
1.3 misha 57: might contain values > 255 and/or Unicode properties.
1.1 misha 58:
59: Arguments:
60: c the character
61: data points to the flag byte of the XCLASS data
62:
63: Returns: TRUE if character matches, else FALSE
64: */
65:
66: BOOL
1.6 misha 67: PRIV(xclass)(pcre_uint32 c, const pcre_uchar *data, BOOL utf)
1.1 misha 68: {
1.6 misha 69: pcre_uchar t;
1.1 misha 70: BOOL negated = (*data & XCL_NOT) != 0;
71:
1.5 misha 72: (void)utf;
73: #ifdef COMPILE_PCRE8
74: /* In 8 bit mode, this must always be TRUE. Help the compiler to know that. */
75: utf = TRUE;
76: #endif
77:
1.1 misha 78: /* Character values < 256 are matched against a bitmap, if one is present. If
79: not, we still carry on, because there may be ranges that start below 256 in the
80: additional data. */
81:
82: if (c < 256)
83: {
1.7 moko 84: if ((*data & XCL_HASPROP) == 0)
85: {
86: if ((*data & XCL_MAP) == 0) return negated;
87: return (((pcre_uint8 *)(data + 1))[c/8] & (1 << (c&7))) != 0;
88: }
1.5 misha 89: if ((*data & XCL_MAP) != 0 &&
90: (((pcre_uint8 *)(data + 1))[c/8] & (1 << (c&7))) != 0)
91: return !negated; /* char found */
1.1 misha 92: }
93:
94: /* First skip the bit map if present. Then match against the list of Unicode
95: properties or large chars or ranges that end with a large char. We won't ever
96: encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
97:
1.5 misha 98: if ((*data++ & XCL_MAP) != 0) data += 32 / sizeof(pcre_uchar);
1.1 misha 99:
100: while ((t = *data++) != XCL_END)
101: {
1.6 misha 102: pcre_uint32 x, y;
1.1 misha 103: if (t == XCL_SINGLE)
104: {
1.5 misha 105: #ifdef SUPPORT_UTF
106: if (utf)
107: {
108: GETCHARINC(x, data); /* macro generates multiple statements */
109: }
110: else
111: #endif
112: x = *data++;
1.1 misha 113: if (c == x) return !negated;
114: }
115: else if (t == XCL_RANGE)
116: {
1.5 misha 117: #ifdef SUPPORT_UTF
118: if (utf)
119: {
120: GETCHARINC(x, data); /* macro generates multiple statements */
121: GETCHARINC(y, data); /* macro generates multiple statements */
122: }
123: else
124: #endif
125: {
126: x = *data++;
127: y = *data++;
128: }
1.1 misha 129: if (c >= x && c <= y) return !negated;
130: }
131:
132: #ifdef SUPPORT_UCP
133: else /* XCL_PROP & XCL_NOTPROP */
134: {
1.3 misha 135: const ucd_record *prop = GET_UCD(c);
1.7 moko 136: BOOL isprop = t == XCL_PROP;
1.1 misha 137:
138: switch(*data)
139: {
140: case PT_ANY:
1.7 moko 141: if (isprop) return !negated;
1.1 misha 142: break;
143:
144: case PT_LAMP:
1.4 misha 145: if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
1.7 moko 146: prop->chartype == ucp_Lt) == isprop) return !negated;
1.1 misha 147: break;
148:
149: case PT_GC:
1.7 moko 150: if ((data[1] == PRIV(ucp_gentype)[prop->chartype]) == isprop)
1.4 misha 151: return !negated;
1.1 misha 152: break;
153:
154: case PT_PC:
1.7 moko 155: if ((data[1] == prop->chartype) == isprop) return !negated;
1.1 misha 156: break;
157:
158: case PT_SC:
1.7 moko 159: if ((data[1] == prop->script) == isprop) return !negated;
1.1 misha 160: break;
161:
1.4 misha 162: case PT_ALNUM:
1.5 misha 163: if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1.7 moko 164: PRIV(ucp_gentype)[prop->chartype] == ucp_N) == isprop)
1.4 misha 165: return !negated;
166: break;
167:
1.7 moko 168: /* Perl space used to exclude VT, but from Perl 5.18 it is included,
169: which means that Perl space and POSIX space are now identical. PCRE
170: was changed at release 8.34. */
171:
1.4 misha 172: case PT_SPACE: /* Perl space */
1.7 moko 173: case PT_PXSPACE: /* POSIX space */
174: switch(c)
175: {
176: HSPACE_CASES:
177: VSPACE_CASES:
178: if (isprop) return !negated;
179: break;
1.4 misha 180:
1.7 moko 181: default:
182: if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z) == isprop)
183: return !negated;
184: break;
185: }
1.4 misha 186: break;
187:
188: case PT_WORD:
1.5 misha 189: if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
190: PRIV(ucp_gentype)[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE)
1.7 moko 191: == isprop)
1.4 misha 192: return !negated;
193: break;
194:
1.6 misha 195: case PT_UCNC:
196: if (c < 0xa0)
197: {
198: if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
1.7 moko 199: c == CHAR_GRAVE_ACCENT) == isprop)
1.6 misha 200: return !negated;
201: }
202: else
203: {
1.7 moko 204: if ((c < 0xd800 || c > 0xdfff) == isprop)
1.6 misha 205: return !negated;
206: }
207: break;
208:
1.7 moko 209: /* The following three properties can occur only in an XCLASS, as there
210: is no \p or \P coding for them. */
211:
212: /* Graphic character. Implement this as not Z (space or separator) and
213: not C (other), except for Cf (format) with a few exceptions. This seems
214: to be what Perl does. The exceptional characters are:
215:
216: U+061C Arabic Letter Mark
217: U+180E Mongolian Vowel Separator
218: U+2066 - U+2069 Various "isolate"s
219: */
220:
221: case PT_PXGRAPH:
222: if ((PRIV(ucp_gentype)[prop->chartype] != ucp_Z &&
223: (PRIV(ucp_gentype)[prop->chartype] != ucp_C ||
224: (prop->chartype == ucp_Cf &&
225: c != 0x061c && c != 0x180e && (c < 0x2066 || c > 0x2069))
226: )) == isprop)
227: return !negated;
228: break;
229:
230: /* Printable character: same as graphic, with the addition of Zs, i.e.
231: not Zl and not Zp, and U+180E. */
232:
233: case PT_PXPRINT:
234: if ((prop->chartype != ucp_Zl &&
235: prop->chartype != ucp_Zp &&
236: (PRIV(ucp_gentype)[prop->chartype] != ucp_C ||
237: (prop->chartype == ucp_Cf &&
238: c != 0x061c && (c < 0x2066 || c > 0x2069))
239: )) == isprop)
240: return !negated;
241: break;
242:
243: /* Punctuation: all Unicode punctuation, plus ASCII characters that
244: Unicode treats as symbols rather than punctuation, for Perl
245: compatibility (these are $+<=>^`|~). */
246:
247: case PT_PXPUNCT:
248: if ((PRIV(ucp_gentype)[prop->chartype] == ucp_P ||
1.8 ! moko 249: (c < 128 && PRIV(ucp_gentype)[prop->chartype] == ucp_S)) == isprop)
1.7 moko 250: return !negated;
251: break;
252:
1.1 misha 253: /* This should never occur, but compilers may mutter if there is no
254: default. */
255:
256: default:
257: return FALSE;
258: }
259:
260: data += 2;
261: }
262: #endif /* SUPPORT_UCP */
263: }
264:
265: return negated; /* char did not match */
266: }
267:
268: /* End of pcre_xclass.c */
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