Start IA32 implemenetation of regexp2k

regexp2000/src/regexp-macro-assembler.cc

+// Copyright 2008 the V8 project authors. 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 Google Inc. 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.
+
+#include "v8.h"
+#include "regexp-macro-assembler.h"
+
+namespace v8 { namespace internal {
+
+
+ByteArrayProvider::ByteArrayProvider(int initial_size)
+ : byte_array_size_(initial_size),
+   current_byte_array_(NULL),
+   current_byte_array_free_offset_(initial_size) {}
+
+
+template <typename T>
+ArraySlice<T> ByteArrayProvider::GetBuffer(int size) {
+  ASSERT(sze > 0);
+  size_t elem_size = sizeof(T);
+  size_t byte_size = size * elem_size;
+  int free_offset = current_byte_array_free_offset_;
+  // align elements
+  free_offset += elem_size - 1;
+  free_offset = free_offset - (free_offset % elem_size);
+
+  if (free_offset + byte_size > byte_array_size_) {
+    if (byte_size > (byte_array_size_ / 2)) {
+      Handle<ByteArray> solo_buffer = Factory::NewByteArray(byte_size, TENURED);
+      return ArraySlice<T>(solo_buffer, 0);
+    }
+    current_byte_array_ = Factory::NewByteArray(byte_array_size_, TENURED);
+    free_offset = 0;
+  }
+  current_byte_array_free_offset_ = free_offset + size;
+  return ArraySlice<T>(current_byte_array_, free_offset);
+}
+
+}}