auto import from //depot/cupcake/@135843

1 files changed, 99 insertions, 0 deletions

diff --git a/JavaScriptCore/pcre/pcre_ucp_searchfuncs.cpp b/JavaScriptCore/pcre/pcre_ucp_searchfuncs.cpp
new file mode 100644
index 0000000..6e1d0e4
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+++ b/JavaScriptCore/pcre/pcre_ucp_searchfuncs.cpp
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+/* 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 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 code for searching the table of Unicode character
+properties. */
+
+#include "config.h"
+#include "pcre_internal.h"
+
+#include "ucpinternal.h"       /* Internal table details */
+#include "ucptable.cpp"        /* The table itself */
+
+/*************************************************
+*       Search table and return other case       *
+*************************************************/
+
+/* If the given character is a letter, and there is another case for the
+letter, return the other case. Otherwise, return -1.
+
+Arguments:
+  c           the character value
+
+Returns:      the other case or -1 if none
+*/
+
+int kjs_pcre_ucp_othercase(unsigned c)
+{
+    int bot = 0;
+    int top = sizeof(ucp_table) / sizeof(cnode);
+    int mid;
+    
+    /* The table is searched using a binary chop. You might think that using
+     intermediate variables to hold some of the common expressions would speed
+     things up, but tests with gcc 3.4.4 on Linux showed that, on the contrary, it
+     makes things a lot slower. */
+    
+    for (;;) {
+        if (top <= bot)
+            return -1;
+        mid = (bot + top) >> 1;
+        if (c == (ucp_table[mid].f0 & f0_charmask))
+            break;
+        if (c < (ucp_table[mid].f0 & f0_charmask))
+            top = mid;
+        else {
+            if ((ucp_table[mid].f0 & f0_rangeflag) && (c <= (ucp_table[mid].f0 & f0_charmask) + (ucp_table[mid].f1 & f1_rangemask)))
+                break;
+            bot = mid + 1;
+        }
+    }
+    
+    /* Found an entry in the table. Return -1 for a range entry. Otherwise return
+     the other case if there is one, else -1. */
+    
+    if (ucp_table[mid].f0 & f0_rangeflag)
+        return -1;
+    
+    int offset = ucp_table[mid].f1 & f1_casemask;
+    if (offset & f1_caseneg)
+        offset |= f1_caseneg;
+    return !offset ? -1 : c + offset;
+}