1 files changed, 115 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/pcre/pcre_xclass.cpp b/Source/JavaScriptCore/pcre/pcre_xclass.cpp
new file mode 100644
index 0000000..a32edd4
--- /dev/null
+++ b/Source/JavaScriptCore/pcre/pcre_xclass.cpp
@@ -0,0 +1,115 @@
+/* This is JavaScriptCore's variant of the PCRE library. While this library
+started out as a copy of PCRE, many of the features of PCRE have been
+removed. This library now supports only the regular expression features
+required by the JavaScript language specification, and has only the functions
+needed by JavaScriptCore and the rest of WebKit.
+
+                 Originally written by Philip Hazel
+           Copyright (c) 1997-2006 University of Cambridge
+    Copyright (C) 2002, 2004, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+
+-----------------------------------------------------------------------------
+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 (one that contains characters whose values are > 255). */
+
+#include "config.h"
+#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.
+
+Arguments:
+  c           the character
+  data        points to the flag byte of the XCLASS data
+
+Returns:      true if character matches, else false
+*/
+
+/* Get the next UTF-8 character, advancing the pointer. This is called when we
+ know we are in UTF-8 mode. */
+
+static inline void getUTF8CharAndAdvancePointer(int& c, const unsigned char*& subjectPtr)
+{
+    c = *subjectPtr++;
+    if ((c & 0xc0) == 0xc0) {
+        int gcaa = jsc_pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */
+        int gcss = 6 * gcaa;
+        c = (c & jsc_pcre_utf8_table3[gcaa]) << gcss;
+        while (gcaa-- > 0) {
+            gcss -= 6;
+            c |= (*subjectPtr++ & 0x3f) << gcss;
+        }
+    }
+}
+
+bool jsc_pcre_xclass(int c, const unsigned char* data)
+{
+    bool negated = (*data & XCL_NOT);
+    
+    /* 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_MAP) != 0 && (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;
+    
+    int t;
+    while ((t = *data++) != XCL_END) {
+        if (t == XCL_SINGLE) {
+            int x;
+            getUTF8CharAndAdvancePointer(x, data);
+            if (c == x)
+                return !negated;
+        }
+        else if (t == XCL_RANGE) {
+            int x, y;
+            getUTF8CharAndAdvancePointer(x, data);
+            getUTF8CharAndAdvancePointer(y, data);
+            if (c >= x && c <= y)
+                return !negated;
+        }
+    }
+    
+    return negated;   /* char did not match */
+}