Annotation of embedaddon/php/ext/pcre/pcrelib/pcre_xclass.c, revision 1.1
1.1 ! misho 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) 1997-2010 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. It is used by both pcre_exec() and pcre_def_exec(). */
! 43:
! 44:
! 45: #include "config.h"
! 46:
! 47: #include "pcre_internal.h"
! 48:
! 49:
! 50: /*************************************************
! 51: * Match character against an XCLASS *
! 52: *************************************************/
! 53:
! 54: /* This function is called to match a character against an extended class that
! 55: might contain values > 255 and/or Unicode properties.
! 56:
! 57: Arguments:
! 58: c the character
! 59: data points to the flag byte of the XCLASS data
! 60:
! 61: Returns: TRUE if character matches, else FALSE
! 62: */
! 63:
! 64: BOOL
! 65: _pcre_xclass(int c, const uschar *data)
! 66: {
! 67: int t;
! 68: BOOL negated = (*data & XCL_NOT) != 0;
! 69:
! 70: /* Character values < 256 are matched against a bitmap, if one is present. If
! 71: not, we still carry on, because there may be ranges that start below 256 in the
! 72: additional data. */
! 73:
! 74: if (c < 256)
! 75: {
! 76: if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
! 77: return !negated; /* char found */
! 78: }
! 79:
! 80: /* First skip the bit map if present. Then match against the list of Unicode
! 81: properties or large chars or ranges that end with a large char. We won't ever
! 82: encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
! 83:
! 84: if ((*data++ & XCL_MAP) != 0) data += 32;
! 85:
! 86: while ((t = *data++) != XCL_END)
! 87: {
! 88: int x, y;
! 89: if (t == XCL_SINGLE)
! 90: {
! 91: GETCHARINC(x, data);
! 92: if (c == x) return !negated;
! 93: }
! 94: else if (t == XCL_RANGE)
! 95: {
! 96: GETCHARINC(x, data);
! 97: GETCHARINC(y, data);
! 98: if (c >= x && c <= y) return !negated;
! 99: }
! 100:
! 101: #ifdef SUPPORT_UCP
! 102: else /* XCL_PROP & XCL_NOTPROP */
! 103: {
! 104: const ucd_record *prop = GET_UCD(c);
! 105:
! 106: switch(*data)
! 107: {
! 108: case PT_ANY:
! 109: if (t == XCL_PROP) return !negated;
! 110: break;
! 111:
! 112: case PT_LAMP:
! 113: if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
! 114: prop->chartype == ucp_Lt) == (t == XCL_PROP)) return !negated;
! 115: break;
! 116:
! 117: case PT_GC:
! 118: if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP))
! 119: return !negated;
! 120: break;
! 121:
! 122: case PT_PC:
! 123: if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
! 124: break;
! 125:
! 126: case PT_SC:
! 127: if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
! 128: break;
! 129:
! 130: case PT_ALNUM:
! 131: if ((_pcre_ucp_gentype[prop->chartype] == ucp_L ||
! 132: _pcre_ucp_gentype[prop->chartype] == ucp_N) == (t == XCL_PROP))
! 133: return !negated;
! 134: break;
! 135:
! 136: case PT_SPACE: /* Perl space */
! 137: if ((_pcre_ucp_gentype[prop->chartype] == ucp_Z ||
! 138: c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR)
! 139: == (t == XCL_PROP))
! 140: return !negated;
! 141: break;
! 142:
! 143: case PT_PXSPACE: /* POSIX space */
! 144: if ((_pcre_ucp_gentype[prop->chartype] == ucp_Z ||
! 145: c == CHAR_HT || c == CHAR_NL || c == CHAR_VT ||
! 146: c == CHAR_FF || c == CHAR_CR) == (t == XCL_PROP))
! 147: return !negated;
! 148: break;
! 149:
! 150: case PT_WORD:
! 151: if ((_pcre_ucp_gentype[prop->chartype] == ucp_L ||
! 152: _pcre_ucp_gentype[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE)
! 153: == (t == XCL_PROP))
! 154: return !negated;
! 155: break;
! 156:
! 157: /* This should never occur, but compilers may mutter if there is no
! 158: default. */
! 159:
! 160: default:
! 161: return FALSE;
! 162: }
! 163:
! 164: data += 2;
! 165: }
! 166: #endif /* SUPPORT_UCP */
! 167: }
! 168:
! 169: return negated; /* char did not match */
! 170: }
! 171:
! 172: /* End of pcre_xclass.c */
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