Wholesale move sky/engine/tonic to tonic

tonic/dart_exception_factory.cc

Index: tonic/dart_exception_factory.cc
diff --git a/tonic/dart_exception_factory.cc b/tonic/dart_exception_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3b39d85d4db4a974cd7c1d06924f40e9a42fec77
--- /dev/null
+++ b/tonic/dart_exception_factory.cc
@@ -0,0 +1,121 @@
+// Copyright 2015 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 "tonic/dart_exception_factory.h"
+
+#include "tonic/dart_converter.h"
+#include "tonic/dart_builtin.h"
+
+namespace blink {
+
+// TODO(johnmccutchan): Move this into another file.
+class StdStringBuilder {
+ public:
+  StdStringBuilder() {
+  }
+
+  void Append(const char* s, intptr_t length) {
+    if (s == NULL) {
+      return;
+    }
+    for (intptr_t i = 0; i < length; i++) {
+      buffer_.push_back(s[i]);
+    }
+  }
+
+  void Append(const char* s) {
+    if (s == NULL) {
+      return;
+    }
+    for (intptr_t i = 0; s[i] != '\0'; i++) {
+      buffer_.push_back(s[i]);
+    }
+  }
+
+  void Append(char ch) {
+    buffer_.push_back(ch);
+  }
+
+  void Append(std::string s) {
+    if (s.length() == 0) {
+      return;
+    }
+    const char* c_str = s.data();
+    intptr_t c_str_length = s.size();
+    Append(c_str, c_str_length);
+  }
+
+  void AppendNumber(int num) {
+    Append(std::to_string(num));
+  }
+
+  void Clear() {
+    buffer_.resize(0);
+  }
+
+  void ShrinkToFit() {
+    buffer_.shrink_to_fit();
+  }
+
+  void Reserve(intptr_t capacity) {
+    buffer_.reserve(capacity);
+  }
+
+  std::string ToString() {
+    return std::string(buffer_.data(), buffer_.size());
+  }
+
+  const char* data() const {
+    return buffer_.data();
+  }
+
+  char* data() {
+    return buffer_.data();
+  }
+
+  intptr_t size() const {
+    return buffer_.size();
+  }
+
+ private:
+  std::vector<char> buffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(StdStringBuilder);
+};
+
+DartExceptionFactory::DartExceptionFactory(DartState* dart_state)
+    : dart_state_(dart_state) {
+}
+
+DartExceptionFactory::~DartExceptionFactory() {
+}
+
+Dart_Handle DartExceptionFactory::CreateNullArgumentException(int index) {
+  StdStringBuilder builder;
+  builder.Append("Argument ");
+  builder.AppendNumber(index);
+  builder.Append(" cannot be null.");
+  Dart_Handle message_handle = Dart_NewStringFromUTF8(
+      reinterpret_cast<const uint8_t*>(builder.data()), builder.size());
+  return CreateException("ArgumentError", message_handle);
+}
+
+Dart_Handle DartExceptionFactory::CreateException(const std::string& class_name,
+                                                  const std::string& message) {
+  return CreateException(class_name, StdStringToDart(message));
+}
+
+Dart_Handle DartExceptionFactory::CreateException(const std::string& class_name,
+                                                  Dart_Handle message) {
+  if (core_library_.is_empty()) {
+    Dart_Handle library = DartBuiltin::LookupLibrary("dart:core");
+    core_library_.Set(dart_state_, library);
+  }
+
+  Dart_Handle exception_class = Dart_GetType(
+      core_library_.value(), StdStringToDart(class_name), 0, 0);
+  return Dart_New(exception_class, Dart_EmptyString(), 1, &message);
+}
+
+}  // namespace blink