Import the v8-i18n extension into v8

src/extensions/i18n/i18n-utils.cc

+// Copyright 2013 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.
+// limitations under the License.
+
+#include "i18n-utils.h"
+
+#include <string.h>
+
+#include "unicode/unistr.h"
+
+namespace v8_i18n {
+
+// static
+void Utils::StrNCopy(char* dest, int length, const char* src) {
+  if (!dest || !src) return;
+
+  strncpy(dest, src, length);
+  dest[length - 1] = '\0';
+}
+
+// static
+bool Utils::V8StringToUnicodeString(const v8::Handle<v8::Value>& input,
+                                    icu::UnicodeString* output) {
+  v8::String::Utf8Value utf8_value(input);
+
+  if (*utf8_value == NULL) return false;
+
+  output->setTo(icu::UnicodeString::fromUTF8(*utf8_value));
+
+  return true;
+}
+
+// static
+bool Utils::ExtractStringSetting(const v8::Handle<v8::Object>& settings,
+                                 const char* setting,
+                                 icu::UnicodeString* result) {
+  if (!setting || !result) return false;
+
+  v8::HandleScope handle_scope;
+  v8::TryCatch try_catch;
+  v8::Handle<v8::Value> value = settings->Get(v8::String::New(setting));
+  if (try_catch.HasCaught()) {
+    return false;
+  }
+  // No need to check if |value| is empty because it's taken care of
+  // by TryCatch above.
+  if (!value->IsUndefined() && !value->IsNull() && value->IsString()) {
+    return V8StringToUnicodeString(value, result);
+  }
+  return false;
+}
+
+// static
+bool Utils::ExtractIntegerSetting(const v8::Handle<v8::Object>& settings,
+                                  const char* setting,
+                                  int32_t* result) {
+  if (!setting || !result) return false;
+
+  v8::HandleScope handle_scope;
+  v8::TryCatch try_catch;
+  v8::Handle<v8::Value> value = settings->Get(v8::String::New(setting));
+  if (try_catch.HasCaught()) {
+    return false;
+  }
+  // No need to check if |value| is empty because it's taken care of
+  // by TryCatch above.
+  if (!value->IsUndefined() && !value->IsNull() && value->IsNumber()) {
+    *result = static_cast<int32_t>(value->Int32Value());
+    return true;
+  }
+  return false;
+}
+
+// static
+bool Utils::ExtractBooleanSetting(const v8::Handle<v8::Object>& settings,
+                                  const char* setting,
+                                  bool* result) {
+  if (!setting || !result) return false;
+
+  v8::HandleScope handle_scope;
+  v8::TryCatch try_catch;
+  v8::Handle<v8::Value> value = settings->Get(v8::String::New(setting));
+  if (try_catch.HasCaught()) {
+    return false;
+  }
+  // No need to check if |value| is empty because it's taken care of
+  // by TryCatch above.
+  if (!value->IsUndefined() && !value->IsNull() && value->IsBoolean()) {
+    *result = static_cast<bool>(value->BooleanValue());
+    return true;
+  }
+  return false;
+}
+
+// static
+void Utils::AsciiToUChar(const char* source,
+                         int32_t source_length,
+                         UChar* target,
+                         int32_t target_length) {
+  int32_t length =
+      source_length < target_length ? source_length : target_length;
+
+  if (length <= 0) {
+    return;
+  }
+
+  for (int32_t i = 0; i < length - 1; ++i) {
+    target[i] = static_cast<UChar>(source[i]);
+  }
+
+  target[length - 1] = 0x0u;
+}
+
+// static
+// Chrome Linux doesn't like static initializers in class, so we create
+// template on demand.
+v8::Local<v8::ObjectTemplate> Utils::GetTemplate(v8::Isolate* isolate) {
+  static v8::Persistent<v8::ObjectTemplate> icu_template;
+
+  if (icu_template.IsEmpty()) {
+    v8::Local<v8::ObjectTemplate> raw_template(v8::ObjectTemplate::New());
+
+    // Set aside internal field for ICU class.
+    raw_template->SetInternalFieldCount(1);
+
+    icu_template.Reset(isolate, raw_template);
+  }
+
+  return v8::Local<v8::ObjectTemplate>::New(isolate, icu_template);
+}
+
+// static
+// Chrome Linux doesn't like static initializers in class, so we create
+// template on demand. This one has 2 internal fields.
+v8::Local<v8::ObjectTemplate> Utils::GetTemplate2(v8::Isolate* isolate) {
+  static v8::Persistent<v8::ObjectTemplate> icu_template_2;
+
+  if (icu_template_2.IsEmpty()) {
+    v8::Local<v8::ObjectTemplate> raw_template(v8::ObjectTemplate::New());
+
+    // Set aside internal field for ICU class and additional data.
+    raw_template->SetInternalFieldCount(2);
+
+    icu_template_2.Reset(isolate, raw_template);
+  }
+
+  return v8::Local<v8::ObjectTemplate>::New(isolate, icu_template_2);
+}
+
+}  // namespace v8_i18n