implement C++ assert (stdio, apple) (#612)

* implement C++ assert (stdio, apple)

* Update tests for firebase_firestore_util renames

* renaming `assert.h` to `firebase_assert.h`

* refactoring to a common `WrapNSStringNoCopy()`

1 files changed, 39 insertions, 0 deletions

diff --git a/Firestore/core/src/firebase/firestore/util/string_apple.h b/Firestore/core/src/firebase/firestore/util/string_apple.h
new file mode 100644
index 0000000..42b51dd
--- /dev/null
+++ b/Firestore/core/src/firebase/firestore/util/string_apple.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_STRING_APPLE_H_
+#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_STRING_APPLE_H_
+
+#import <Foundation/Foundation.h>
+
+namespace firebase {
+namespace firestore {
+namespace util {
+
+// Translates a C string to the equivalent NSString without making a copy.
+inline NSString* WrapNSStringNoCopy(const char* c_str) {
+  return [[NSString alloc] initWithBytesNoCopy:const_cast<void*>(static_cast<const void*>(c_str))
+                                        length:strlen(c_str)
+                                      encoding:NSUTF8StringEncoding
+                                  freeWhenDone:NO];
+}
+
+
+}  // namespace util
+}  // namespace firestore
+}  // namespace firebase
+
+#endif  // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_STRING_APPLE_H_