290 lines
9.0 KiB
C
290 lines
9.0 KiB
C
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/*************************************************
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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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Original API code Copyright (c) 1997-2012 University of Cambridge
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New API code Copyright (c) 2016-2022 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 contains an internal function that is used to match an extended
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class. It is used by pcre2_auto_possessify() and by both pcre2_match() and
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pcre2_def_match(). */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre2_internal.h"
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/*************************************************
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* Match character against an XCLASS *
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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 codepoints above 255 and/or Unicode properties.
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Arguments:
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c the character
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data points to the flag code unit of the XCLASS data
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utf TRUE if in UTF mode
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Returns: TRUE if character matches, else FALSE
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*/
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BOOL
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PRIV(xclass)(uint32_t c, PCRE2_SPTR data, BOOL utf)
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{
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PCRE2_UCHAR t;
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BOOL negated = (*data & XCL_NOT) != 0;
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#if PCRE2_CODE_UNIT_WIDTH == 8
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/* In 8 bit mode, this must always be TRUE. Help the compiler to know that. */
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utf = TRUE;
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#endif
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/* Code points < 256 are matched against a bitmap, if one is present. If not,
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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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if (c < 256)
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{
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if ((*data & XCL_HASPROP) == 0)
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{
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if ((*data & XCL_MAP) == 0) return negated;
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return (((uint8_t *)(data + 1))[c/8] & (1u << (c&7))) != 0;
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}
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if ((*data & XCL_MAP) != 0 &&
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(((uint8_t *)(data + 1))[c/8] & (1u << (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 UTF support is not compiled. */
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if ((*data++ & XCL_MAP) != 0) data += 32 / sizeof(PCRE2_UCHAR);
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while ((t = *data++) != XCL_END)
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{
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uint32_t x, y;
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if (t == XCL_SINGLE)
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{
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#ifdef SUPPORT_UNICODE
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if (utf)
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{
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GETCHARINC(x, data); /* macro generates multiple statements */
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}
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else
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#endif
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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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#ifdef SUPPORT_UNICODE
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if (utf)
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{
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GETCHARINC(x, data); /* macro generates multiple statements */
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GETCHARINC(y, data); /* macro generates multiple statements */
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}
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else
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#endif
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{
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x = *data++;
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y = *data++;
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}
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if (c >= x && c <= y) return !negated;
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}
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#ifdef SUPPORT_UNICODE
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else /* XCL_PROP & XCL_NOTPROP */
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{
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const ucd_record *prop = GET_UCD(c);
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BOOL isprop = t == XCL_PROP;
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BOOL ok;
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switch(*data)
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{
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case PT_ANY:
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if (isprop) return !negated;
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break;
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case PT_LAMP:
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if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
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prop->chartype == ucp_Lt) == isprop) return !negated;
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break;
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case PT_GC:
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if ((data[1] == PRIV(ucp_gentype)[prop->chartype]) == isprop)
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return !negated;
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break;
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case PT_PC:
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if ((data[1] == prop->chartype) == isprop) return !negated;
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break;
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case PT_SC:
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if ((data[1] == prop->script) == isprop) return !negated;
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break;
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case PT_SCX:
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ok = (data[1] == prop->script ||
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MAPBIT(PRIV(ucd_script_sets) + UCD_SCRIPTX_PROP(prop), data[1]) != 0);
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if (ok == isprop) return !negated;
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break;
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case PT_ALNUM:
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if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
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PRIV(ucp_gentype)[prop->chartype] == ucp_N) == isprop)
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return !negated;
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break;
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/* Perl space used to exclude VT, but from Perl 5.18 it is included,
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which means that Perl space and POSIX space are now identical. PCRE
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was changed at release 8.34. */
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case PT_SPACE: /* Perl space */
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case PT_PXSPACE: /* POSIX space */
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switch(c)
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{
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HSPACE_CASES:
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VSPACE_CASES:
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if (isprop) return !negated;
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break;
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default:
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if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z) == isprop)
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return !negated;
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break;
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}
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break;
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case PT_WORD:
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if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
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PRIV(ucp_gentype)[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE)
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== isprop)
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return !negated;
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break;
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case PT_UCNC:
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if (c < 0xa0)
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{
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if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
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c == CHAR_GRAVE_ACCENT) == isprop)
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return !negated;
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}
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else
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{
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if ((c < 0xd800 || c > 0xdfff) == isprop)
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return !negated;
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}
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break;
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case PT_BIDICL:
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if ((UCD_BIDICLASS_PROP(prop) == data[1]) == isprop)
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return !negated;
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break;
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case PT_BOOL:
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ok = MAPBIT(PRIV(ucd_boolprop_sets) +
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UCD_BPROPS_PROP(prop), data[1]) != 0;
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if (ok == isprop) return !negated;
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break;
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/* The following three properties can occur only in an XCLASS, as there
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is no \p or \P coding for them. */
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/* Graphic character. Implement this as not Z (space or separator) and
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not C (other), except for Cf (format) with a few exceptions. This seems
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to be what Perl does. The exceptional characters are:
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U+061C Arabic Letter Mark
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U+180E Mongolian Vowel Separator
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U+2066 - U+2069 Various "isolate"s
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*/
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case PT_PXGRAPH:
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if ((PRIV(ucp_gentype)[prop->chartype] != ucp_Z &&
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(PRIV(ucp_gentype)[prop->chartype] != ucp_C ||
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(prop->chartype == ucp_Cf &&
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c != 0x061c && c != 0x180e && (c < 0x2066 || c > 0x2069))
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)) == isprop)
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return !negated;
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break;
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/* Printable character: same as graphic, with the addition of Zs, i.e.
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not Zl and not Zp, and U+180E. */
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case PT_PXPRINT:
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if ((prop->chartype != ucp_Zl &&
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prop->chartype != ucp_Zp &&
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(PRIV(ucp_gentype)[prop->chartype] != ucp_C ||
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(prop->chartype == ucp_Cf &&
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c != 0x061c && (c < 0x2066 || c > 0x2069))
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)) == isprop)
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return !negated;
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break;
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/* Punctuation: all Unicode punctuation, plus ASCII characters that
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Unicode treats as symbols rather than punctuation, for Perl
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compatibility (these are $+<=>^`|~). */
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case PT_PXPUNCT:
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if ((PRIV(ucp_gentype)[prop->chartype] == ucp_P ||
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(c < 128 && PRIV(ucp_gentype)[prop->chartype] == ucp_S)) == isprop)
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return !negated;
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break;
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/* This should never occur, but compilers may mutter if there is no
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default. */
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default:
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return FALSE;
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}
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data += 2;
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}
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#else
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(void)utf; /* Avoid compiler warning */
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#endif /* SUPPORT_UNICODE */
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}
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return negated; /* char did not match */
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}
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/* End of pcre2_xclass.c */
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