author | Simon Howkins <simonh@symbian.org> |
Mon, 15 Nov 2010 14:53:34 +0000 | |
branch | RCL_3 |
changeset 105 | 871af676edac |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/************************************************* |
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* Perl-Compatible Regular Expressions * |
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*************************************************/ |
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|
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/* PCRE is a library of functions to support regular expressions whose syntax |
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and semantics are as close as possible to those of the Perl 5 language. |
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|
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Written by Philip Hazel |
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Copyright (c) 1997-2005 University of Cambridge |
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|
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----------------------------------------------------------------------------- |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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|
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* Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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|
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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|
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* Neither the name of the University of Cambridge nor the names of its |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE. |
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----------------------------------------------------------------------------- |
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*/ |
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|
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/* This module contains an internal function that is used to match an extended |
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class (one that contains characters whose values are > 255). It is used by both |
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pcre_exec() and pcre_def_exec(). */ |
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#include "pcre_internal.h" |
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/************************************************* |
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* Match character against an XCLASS * |
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*************************************************/ |
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|
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/* This function is called to match a character against an extended class that |
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might contain values > 255. |
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|
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Arguments: |
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c the character |
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data points to the flag byte of the XCLASS data |
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Returns: TRUE if character matches, else FALSE |
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*/ |
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PCRE_EXPORT BOOL |
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_pcre_xclass(int c, const uschar *data) |
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{ |
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int t; |
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BOOL negated = (*data & XCL_NOT) != 0; |
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/* Character values < 256 are matched against a bitmap, if one is present. If |
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not, we still carry on, because there may be ranges that start below 256 in the |
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additional data. */ |
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|
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if (c < 256) |
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{ |
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if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0) |
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return !negated; /* char found */ |
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} |
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/* First skip the bit map if present. Then match against the list of Unicode |
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properties or large chars or ranges that end with a large char. We won't ever |
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encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */ |
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|
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if ((*data++ & XCL_MAP) != 0) data += 32; |
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|
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while ((t = *data++) != XCL_END) |
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{ |
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int x, y; |
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if (t == XCL_SINGLE) |
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{ |
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GETUTF8CHARINC(x, data); |
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if (c == x) return !negated; |
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} |
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else if (t == XCL_RANGE) |
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{ |
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GETUTF8CHARINC(x, data); |
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GETUTF8CHARINC(y, data); |
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if (c >= x && c <= y) return !negated; |
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} |
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#ifdef SUPPORT_UCP |
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else /* XCL_PROP & XCL_NOTPROP */ |
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{ |
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int chartype, othercase; |
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int rqdtype = *data++; |
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int category = _pcre_ucp_findchar(c, &chartype, &othercase); |
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if (rqdtype >= 128) |
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{ |
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if ((rqdtype - 128 == category) == (t == XCL_PROP)) return !negated; |
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} |
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else |
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{ |
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if ((rqdtype == chartype) == (t == XCL_PROP)) return !negated; |
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} |
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} |
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#endif /* SUPPORT_UCP */ |
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} |
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|
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return negated; /* char did not match */ |
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} |
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|
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/* End of pcre_xclass.c */ |