New class StringPool. Removed the class var::identifier from its parent class, and renamed it "Identifier" - I've left a typedef in var to allow old code to still work, but I'll remove this at some point, so please switch to using the new classname directly. Jucer development.

src/text/juce_StringPool.cpp

@@ -0,0 +1,105 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library - "Jules' Utility Class Extensions"
+   Copyright 2004-10 by Raw Material Software Ltd.
+
+  ------------------------------------------------------------------------------
+
+   JUCE can be redistributed and/or modified under the terms of the GNU General
+   Public License (Version 2), as published by the Free Software Foundation.
+   A copy of the license is included in the JUCE distribution, or can be found
+   online at www.gnu.org/licenses.
+
+   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  ------------------------------------------------------------------------------
+
+   To release a closed-source product which uses JUCE, commercial licenses are
+   available: visit www.rawmaterialsoftware.com/juce for more information.
+
+  ==============================================================================
+*/
+
+#include "../core/juce_StandardHeader.h"
+
+BEGIN_JUCE_NAMESPACE
+
+#include "juce_StringPool.h"
+
+
+//==============================================================================
+StringPool::StringPool() throw()    {}
+StringPool::~StringPool()           {}
+
+template <class StringType>
+static const juce_wchar* getPooledStringFromArray (Array<String>& strings, StringType newString)
+{
+    int start = 0;
+    int end = strings.size();
+
+    for (;;)
+    {
+        if (start >= end)
+        {
+            jassert (start <= end);
+            strings.insert (start, newString);
+            return strings.getReference (start);
+        }
+        else
+        {
+            const String& startString = strings.getReference (start);
+
+            if (startString == newString)
+                return startString;
+
+            const int halfway = (start + end) >> 1;
+
+            if (halfway == start)
+            {
+                if (startString.compare (newString) < 0)
+                    ++start;
+
+                strings.insert (start, newString);
+                return strings.getReference (start);
+            }
+
+            const int comp = strings.getReference (halfway).compare (newString);
+
+            if (comp == 0)
+                return strings.getReference (halfway);
+            else if (comp < 0)
+                start = halfway;
+            else
+                end = halfway;
+        }
+    }
+}
+
+const juce_wchar* StringPool::getPooledString (const String& s)
+{
+    if (s.isEmpty())
+        return String::empty;
+
+    return getPooledStringFromArray (strings, s);
+}
+
+const juce_wchar* StringPool::getPooledString (const char* const s)
+{
+    if (s == 0 || *s == 0)
+        return String::empty;
+
+    return getPooledStringFromArray (strings, s);
+}
+
+const juce_wchar* StringPool::getPooledString (const juce_wchar* const s)
+{
+    if (s == 0 || *s == 0)
+        return String::empty;
+
+    return getPooledStringFromArray (strings, s);
+}
+
+END_JUCE_NAMESPACE