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+/*************************************************
+* Perl-Compatible Regular Expressions *
+*************************************************/
+
+/* PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+ Written by Philip Hazel
+ Copyright (c) 1997-2013 University of Cambridge
+
+-----------------------------------------------------------------------------
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ * Neither the name of the University of Cambridge nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+-----------------------------------------------------------------------------
+*/
+
+
+/* This module contains an internal function that is used to match an extended
+class. It is used by both pcre_exec() and pcre_def_exec(). */
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "pcre_internal.h"
+
+
+/*************************************************
+* Match character against an XCLASS *
+*************************************************/
+
+/* This function is called to match a character against an extended class that
+might contain values > 255 and/or Unicode properties.
+
+Arguments:
+ c the character
+ data points to the flag byte of the XCLASS data
+
+Returns: TRUE if character matches, else FALSE
+*/
+
+BOOL
+PRIV(xclass)(pcre_uint32 c, const pcre_uchar *data, BOOL utf)
+{
+pcre_uchar t;
+BOOL negated = (*data & XCL_NOT) != 0;
+
+(void)utf;
+#ifdef COMPILE_PCRE8
+/* In 8 bit mode, this must always be TRUE. Help the compiler to know that. */
+utf = TRUE;
+#endif
+
+/* Character values < 256 are matched against a bitmap, if one is present. If
+not, we still carry on, because there may be ranges that start below 256 in the
+additional data. */
+
+if (c < 256)
+ {
+ if ((*data & XCL_HASPROP) == 0)
+ {
+ if ((*data & XCL_MAP) == 0) return negated;
+ return (((pcre_uint8 *)(data + 1))[c/8] & (1 << (c&7))) != 0;
+ }
+ if ((*data & XCL_MAP) != 0 &&
+ (((pcre_uint8 *)(data + 1))[c/8] & (1 << (c&7))) != 0)
+ return !negated; /* char found */
+ }
+
+/* First skip the bit map if present. Then match against the list of Unicode
+properties or large chars or ranges that end with a large char. We won't ever
+encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
+
+if ((*data++ & XCL_MAP) != 0) data += 32 / sizeof(pcre_uchar);
+
+while ((t = *data++) != XCL_END)
+ {
+ pcre_uint32 x, y;
+ if (t == XCL_SINGLE)
+ {
+#ifdef SUPPORT_UTF
+ if (utf)
+ {
+ GETCHARINC(x, data); /* macro generates multiple statements */
+ }
+ else
+#endif
+ x = *data++;
+ if (c == x) return !negated;
+ }
+ else if (t == XCL_RANGE)
+ {
+#ifdef SUPPORT_UTF
+ if (utf)
+ {
+ GETCHARINC(x, data); /* macro generates multiple statements */
+ GETCHARINC(y, data); /* macro generates multiple statements */
+ }
+ else
+#endif
+ {
+ x = *data++;
+ y = *data++;
+ }
+ if (c >= x && c <= y) return !negated;
+ }
+
+#ifdef SUPPORT_UCP
+ else /* XCL_PROP & XCL_NOTPROP */
+ {
+ const ucd_record *prop = GET_UCD(c);
+ BOOL isprop = t == XCL_PROP;
+
+ switch(*data)
+ {
+ case PT_ANY:
+ if (isprop) return !negated;
+ break;
+
+ case PT_LAMP:
+ if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
+ prop->chartype == ucp_Lt) == isprop) return !negated;
+ break;
+
+ case PT_GC:
+ if ((data[1] == PRIV(ucp_gentype)[prop->chartype]) == isprop)
+ return !negated;
+ break;
+
+ case PT_PC:
+ if ((data[1] == prop->chartype) == isprop) return !negated;
+ break;
+
+ case PT_SC:
+ if ((data[1] == prop->script) == isprop) return !negated;
+ break;
+
+ case PT_ALNUM:
+ if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
+ PRIV(ucp_gentype)[prop->chartype] == ucp_N) == isprop)
+ return !negated;
+ break;
+
+ /* Perl space used to exclude VT, but from Perl 5.18 it is included,
+ which means that Perl space and POSIX space are now identical. PCRE
+ was changed at release 8.34. */
+
+ case PT_SPACE: /* Perl space */
+ case PT_PXSPACE: /* POSIX space */
+ switch(c)
+ {
+ HSPACE_CASES:
+ VSPACE_CASES:
+ if (isprop) return !negated;
+ break;
+
+ default:
+ if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z) == isprop)
+ return !negated;
+ break;
+ }
+ break;
+
+ case PT_WORD:
+ if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
+ PRIV(ucp_gentype)[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE)
+ == isprop)
+ return !negated;
+ break;
+
+ case PT_UCNC:
+ if (c < 0xa0)
+ {
+ if ((c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
+ c == CHAR_GRAVE_ACCENT) == isprop)
+ return !negated;
+ }
+ else
+ {
+ if ((c < 0xd800 || c > 0xdfff) == isprop)
+ return !negated;
+ }
+ break;
+
+ /* The following three properties can occur only in an XCLASS, as there
+ is no \p or \P coding for them. */
+
+ /* Graphic character. Implement this as not Z (space or separator) and
+ not C (other), except for Cf (format) with a few exceptions. This seems
+ to be what Perl does. The exceptional characters are:
+
+ U+061C Arabic Letter Mark
+ U+180E Mongolian Vowel Separator
+ U+2066 - U+2069 Various "isolate"s
+ */
+
+ case PT_PXGRAPH:
+ if ((PRIV(ucp_gentype)[prop->chartype] != ucp_Z &&
+ (PRIV(ucp_gentype)[prop->chartype] != ucp_C ||
+ (prop->chartype == ucp_Cf &&
+ c != 0x061c && c != 0x180e && (c < 0x2066 || c > 0x2069))
+ )) == isprop)
+ return !negated;
+ break;
+
+ /* Printable character: same as graphic, with the addition of Zs, i.e.
+ not Zl and not Zp, and U+180E. */
+
+ case PT_PXPRINT:
+ if ((prop->chartype != ucp_Zl &&
+ prop->chartype != ucp_Zp &&
+ (PRIV(ucp_gentype)[prop->chartype] != ucp_C ||
+ (prop->chartype == ucp_Cf &&
+ c != 0x061c && (c < 0x2066 || c > 0x2069))
+ )) == isprop)
+ return !negated;
+ break;
+
+ /* Punctuation: all Unicode punctuation, plus ASCII characters that
+ Unicode treats as symbols rather than punctuation, for Perl
+ compatibility (these are $+<=>^`|~). */
+
+ case PT_PXPUNCT:
+ if ((PRIV(ucp_gentype)[prop->chartype] == ucp_P ||
+ (c < 128 && PRIV(ucp_gentype)[prop->chartype] == ucp_S)) == isprop)
+ return !negated;
+ break;
+
+ /* This should never occur, but compilers may mutter if there is no
+ default. */
+
+ default:
+ return FALSE;
+ }
+
+ data += 2;
+ }
+#endif /* SUPPORT_UCP */
+ }
+
+return negated; /* char did not match */
+}
+
+/* End of pcre_xclass.c */
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