Use protozero for tile decoding

protozero/exception.hpp

@@ -0,0 +1,68 @@
+#ifndef PROTOZERO_EXCEPTION_HPP
+#define PROTOZERO_EXCEPTION_HPP
+
+/*****************************************************************************
+
+protozero - Minimalistic protocol buffer decoder and encoder in C++.
+
+This file is from https://github.com/mapbox/protozero where you can find more
+documentation.
+
+*****************************************************************************/
+
+/**
+ * @file exception.hpp
+ *
+ * @brief Contains the exceptions used in the protozero library.
+ */
+
+#include <exception>
+
+/**
+ * @brief All parts of the protozero header-only library are in this namespace.
+ */
+namespace protozero {
+
+/**
+ * All exceptions explicitly thrown by the functions of the protozero library
+ * derive from this exception.
+ */
+struct exception : std::exception {
+    /// Returns the explanatory string.
+    const char *what() const noexcept override { return "pbf exception"; }
+};
+
+/**
+ * This exception is thrown when parsing a varint thats larger than allowed.
+ * This should never happen unless the data is corrupted.
+ */
+struct varint_too_long_exception : exception {
+    /// Returns the explanatory string.
+    const char *what() const noexcept override { return "varint too long exception"; }
+};
+
+/**
+ * This exception is thrown when the wire type of a pdf field is unknown.
+ * This should never happen unless the data is corrupted.
+ */
+struct unknown_pbf_wire_type_exception : exception {
+    /// Returns the explanatory string.
+    const char *what() const noexcept override { return "unknown pbf field type exception"; }
+};
+
+/**
+ * This exception is thrown when we are trying to read a field and there
+ * are not enough bytes left in the buffer to read it. Almost all functions
+ * of the pbf_reader class can throw this exception.
+ *
+ * This should never happen unless the data is corrupted or you have
+ * initialized the pbf_reader object with incomplete data.
+ */
+struct end_of_buffer_exception : exception {
+    /// Returns the explanatory string.
+    const char *what() const noexcept override { return "end of buffer exception"; }
+};
+
+} // end namespace protozero
+
+#endif // PROTOZERO_EXCEPTION_HPP