Get string operations working on 3ds

Shared/source/UnicodeWord.cpp

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+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2022 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+#include "../include/WordData.h"
+#include "UnicodeData.h"
+#include <stdint.h>
+
+SWIFT_RUNTIME_STDLIB_INTERNAL
+__swift_uint8_t _swift_stdlib_getWordBreakProperty(__swift_uint32_t scalar) {
+  auto index = 1; //0th element is a dummy element
+  while (index < WORD_BREAK_DATA_COUNT) {
+    auto entry = _swift_stdlib_words[index];
+
+    // Shift the range count out of the value.
+    auto lower = (entry << 11) >> 11;
+    
+    // Shift the enum out first, then shift out the scalar value.
+    auto upper = lower + (entry >> 21) - 1;
+
+    //If we want the left child of the current node in our virtual tree,
+    //that's at index * 2, if we want the right child it's at (index * 2) + 1
+    if (scalar < lower) {
+      index = 2 * index;
+    } else if (scalar <= upper) {
+      return _swift_stdlib_words_data[index];
+    } else {
+      index = 2 * index + 1;
+    }
+  }
+  // If we made it out here, then our scalar was not found in the word
+  // array (this occurs when a scalar doesn't map to any word break
+  // property). Return the max value here to indicate .any.
+  return UINT8_MAX;
+}