nearby: snapshot as of cl/296436629

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I2cf5bf225b76f4c1541954651f3a7544a14e0cec

cpp/platform/byte_array.h

@@ -0,0 +1,66 @@
+#ifndef PLATFORM_BYTE_ARRAY_H_
+#define PLATFORM_BYTE_ARRAY_H_
+
+#include "platform/port/string.h"
+
+namespace location {
+namespace nearby {
+
+class ByteArray {
+ public:
+  // Create an empty ByteArray
+  ByteArray() {}
+
+  // Create ByteArray from string.
+  explicit ByteArray(const std::string& source) {
+    data_ = source;
+  }
+
+  // Create default-initialized ByteArray of a given size.
+  explicit ByteArray(size_t size) {
+    setData(size);
+  }
+
+  // Create value-initialized ByteArray of a given size.
+  ByteArray(const char* data, size_t size) {
+    setData(data, size);
+  }
+
+  // Assign a new value to this ByteArray, as a copy of data, with a given size.
+  void setData(const char* data, size_t size) {
+    data_.assign(data, size);
+  }
+
+  // Assign a new value of a given size to this ByteArray
+  // (as a repeated char value).
+  void setData(size_t size, char value = 0) {
+    data_.assign(size, value);
+  }
+
+  char* getData() { return data_.data(); }
+  const char* getData() const { return data_.data(); }
+  size_t size() const { return data_.size(); }
+
+  // Operator overloads when comparing ConstPtr<ByteArray>.
+  bool operator==(const ByteArray& rhs) const {
+    return this->size() == rhs.size() &&
+           memcmp(this->getData(), rhs.getData(), this->size()) == 0;
+  }
+  bool operator!=(const ByteArray& rhs) const { return !(*this == rhs); }
+  bool operator<(const ByteArray& rhs) const {
+    if (this->size() != rhs.size()) {
+      return this->size() < rhs.size();
+    }
+    return memcmp(this->getData(), rhs.getData(), this->size()) < 0;
+  }
+  // TODO(b/149869249) : rename according to go/c-style
+  std::string asString() const { return data_; }
+
+ private:
+  std::string data_;
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_BYTE_ARRAY_H_