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162 lines
4.5 KiB
C++
162 lines
4.5 KiB
C++
/*************************************************
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* Perl-Compatible Regular Expressions *
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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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Written by Philip Hazel
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Copyright (c) 1997-2005 University of Cambridge
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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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* 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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* 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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* 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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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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/* This module compiles code for supporting the use of Unicode character
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properties. We use the (embryonic at the time of writing) UCP library, by
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including some of its files, copies of which have been put in the PCRE
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distribution. The actual search function is reproduced here, with its name
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changed. */
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#include "pcre_internal.h"
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#include "ucp.h" /* Category definitions */
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#include "ucpinternal.h" /* Internal table details */
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#include "ucptable.c" /* The table itself */
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/*************************************************
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* Search table and return data *
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*************************************************/
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/* Two values are returned: the category is ucp_C, ucp_L, etc. The detailed
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character type is ucp_Lu, ucp_Nd, etc.
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Arguments:
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c the character value
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type_ptr the detailed character type is returned here
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case_ptr for letters, the opposite case is returned here, if there
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is one, else zero
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Returns: the character type category or -1 if not found
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*/
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PCRE_EXPORT int
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_pcre_ucp_findchar(const int c, int *type_ptr, int *case_ptr)
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{
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cnode *node = ucp_table;
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register int cc = c;
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int case_offset;
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for (;;)
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{
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register int d = node->f1 | ((node->f0 & f0_chhmask) << 16);
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if (cc == d) break;
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if (cc < d)
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{
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if ((node->f0 & f0_leftexists) == 0) return -1;
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node ++;
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}
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else
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{
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register int roffset = (node->f2 & f2_rightmask) >> f2_rightshift;
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if (roffset == 0) return -1;
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node += 1 << (roffset - 1);
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}
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}
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switch ((*type_ptr = ((node->f0 & f0_typemask) >> f0_typeshift)))
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{
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case ucp_Cc:
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case ucp_Cf:
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case ucp_Cn:
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case ucp_Co:
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case ucp_Cs:
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return ucp_C;
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break;
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case ucp_Ll:
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case ucp_Lu:
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case_offset = node->f2 & f2_casemask;
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if ((case_offset & 0x0100) != 0) case_offset |= 0xfffff000;
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*case_ptr = (case_offset == 0)? 0 : cc + case_offset;
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return ucp_L;
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case ucp_Lm:
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case ucp_Lo:
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case ucp_Lt:
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*case_ptr = 0;
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return ucp_L;
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break;
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case ucp_Mc:
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case ucp_Me:
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case ucp_Mn:
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return ucp_M;
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break;
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case ucp_Nd:
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case ucp_Nl:
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case ucp_No:
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return ucp_N;
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break;
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case ucp_Pc:
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case ucp_Pd:
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case ucp_Pe:
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case ucp_Pf:
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case ucp_Pi:
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case ucp_Ps:
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case ucp_Po:
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return ucp_P;
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break;
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case ucp_Sc:
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case ucp_Sk:
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case ucp_Sm:
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case ucp_So:
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return ucp_S;
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break;
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case ucp_Zl:
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case ucp_Zp:
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case ucp_Zs:
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return ucp_Z;
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break;
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default: /* "Should never happen" */
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return -1;
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break;
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}
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}
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/* End of pcre_ucp_findchar.c */
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