JavaScriptCore-521.tar.gz

[apple/javascriptcore.git] / wrec / WREC.cpp

diff --git a/wrec/WREC.cpp b/wrec/WREC.cpp
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+/*
+ * Copyright (C) 2008 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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. 
+ */
+
+#include "config.h"
+#include "WREC.h"
+
+#if ENABLE(WREC)
+
+#include "CharacterClassConstructor.h"
+#include "Interpreter.h"
+#include "JSGlobalObject.h"
+#include "RegisterFile.h"
+#include "WRECFunctors.h"
+#include "WRECParser.h"
+#include "pcre_internal.h"
+
+using namespace WTF;
+
+namespace JSC { namespace WREC {
+
+CompiledRegExp Generator::compileRegExp(JSGlobalData* globalData, const UString& pattern, unsigned* numSubpatterns_ptr, const char** error_ptr, RefPtr<ExecutablePool>& pool, bool ignoreCase, bool multiline)
+{
+    if (pattern.size() > MAX_PATTERN_SIZE) {
+        *error_ptr = "regular expression too large";
+        return 0;
+    }
+
+    Parser parser(pattern, ignoreCase, multiline);
+    Generator& generator = parser.generator();
+    MacroAssembler::JumpList failures;
+    MacroAssembler::Jump endOfInput;
+
+    generator.generateEnter();
+    generator.generateSaveIndex();
+
+    Label beginPattern(&generator);
+    parser.parsePattern(failures);
+    generator.generateReturnSuccess();
+
+    failures.link(&generator);
+    generator.generateIncrementIndex(&endOfInput);
+    parser.parsePattern(failures);
+    generator.generateReturnSuccess();
+
+    failures.link(&generator);
+    generator.generateIncrementIndex();
+    generator.generateJumpIfNotEndOfInput(beginPattern);
+    
+    endOfInput.link(&generator);
+    generator.generateReturnFailure();
+
+    if (parser.error()) {
+        *error_ptr = parser.syntaxError(); // NULL in the case of patterns that WREC doesn't support yet.
+        return 0;
+    }
+
+    *numSubpatterns_ptr = parser.numSubpatterns();
+    pool = globalData->poolForSize(generator.size());
+    return reinterpret_cast<CompiledRegExp>(generator.copyCode(pool.get()));
+}
+
+} } // namespace JSC::WREC
+
+#endif // ENABLE(WREC)