Move PolicyLoaderMac::CreateValueFromProperty to a generic file.

components/policy/core/common/mac_util.cc

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/policy/core/common/mac_util.h"
+
+#include <string>
+
+#include "base/mac/foundation_util.h"
+#include "base/strings/sys_string_conversions.h"
+#include "base/values.h"
+
+using base::mac::CFCast;
+
+namespace policy {
+
+namespace {
+
+// Callback function for CFDictionaryApplyFunction. |key| and |value| are an
+// entry of the CFDictionary that should be converted into an equivalent entry
+// in the DictionaryValue in |context|.
+void DictionaryEntryToValue(const void* key, const void* value, void* context) {
+  if (CFStringRef cf_key = CFCast<CFStringRef>(key)) {
+    scoped_ptr<base::Value> converted =
+        PropertyToValue(static_cast<CFPropertyListRef>(value));
+    if (converted) {
+      const std::string string = base::SysCFStringRefToUTF8(cf_key);
+      static_cast<base::DictionaryValue*>(context)->Set(
+          string, converted.release());
+    }
+  }
+}
+
+// Callback function for CFArrayApplyFunction. |value| is an entry of the
+// CFArray that should be converted into an equivalent entry in the ListValue
+// in |context|.
+void ArrayEntryToValue(const void* value, void* context) {
+  scoped_ptr<base::Value> converted =
+      PropertyToValue(static_cast<CFPropertyListRef>(value));
+  if (converted)
+    static_cast<base::ListValue *>(context)->Append(converted.release());
+}
+
+}  // namespace
+
+scoped_ptr<base::Value> PropertyToValue(CFPropertyListRef property) {
+  if (CFCast<CFNullRef>(property))
+    return scoped_ptr<base::Value>(base::Value::CreateNullValue());
+
+  if (CFBooleanRef boolean = CFCast<CFBooleanRef>(property)) {
+    return scoped_ptr<base::Value>(
+        base::Value::CreateBooleanValue(CFBooleanGetValue(boolean)));
+  }
+
+  if (CFNumberRef number = CFCast<CFNumberRef>(property)) {
+    // CFNumberGetValue() converts values implicitly when the conversion is not
+    // lossy. Check the type before trying to convert.
+    if (CFNumberIsFloatType(number)) {
+      double double_value = 0.0;
+      if (CFNumberGetValue(number, kCFNumberDoubleType, &double_value)) {
+        return scoped_ptr<base::Value>(
+            base::Value::CreateDoubleValue(double_value));
+      }
+    } else {
+      int int_value = 0;
+      if (CFNumberGetValue(number, kCFNumberIntType, &int_value)) {
+        return scoped_ptr<base::Value>(
+            base::Value::CreateIntegerValue(int_value));
+      }
+    }
+  }
+
+  if (CFStringRef string = CFCast<CFStringRef>(property)) {
+    return scoped_ptr<base::Value>(
+        base::Value::CreateStringValue(base::SysCFStringRefToUTF8(string)));
+  }
+
+  if (CFDictionaryRef dict = CFCast<CFDictionaryRef>(property)) {
+    scoped_ptr<base::DictionaryValue> dict_value(new base::DictionaryValue());
+    CFDictionaryApplyFunction(dict, DictionaryEntryToValue, dict_value.get());
+    return dict_value.PassAs<base::Value>();
+  }
+
+  if (CFArrayRef array = CFCast<CFArrayRef>(property)) {
+    scoped_ptr<base::ListValue> list_value(new base::ListValue());
+    CFArrayApplyFunction(array,
+                         CFRangeMake(0, CFArrayGetCount(array)),
+                         ArrayEntryToValue,
+                         list_value.get());
+    return list_value.PassAs<base::Value>();
+  }
+
+  return scoped_ptr<base::Value>();
+}
+
+}  // namespace policy