checkpoint

mybase64/include/mybase64.hpp

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+/**
+ * @file mybase64.hpp
+ * @author Eric Mertens (emertens@gmail.com)
+ * @brief Base64 encoding and decoding
+ * 
+ */
+#pragma once
+
+#include <cstddef>
+#include <string_view>
+
+namespace mybase64
+{
+
+inline constexpr auto encoded_size(std::size_t len) -> std::size_t
+{
+    return (len + 2) / 3 * 4;
+}
+
+inline constexpr auto decoded_size(std::size_t len) -> std::size_t
+{
+    return (len + 3) / 4 * 3;
+}
+
+/**
+ * @brief Encode a string into base64
+ * 
+ * @param input input text
+ * @param output Target buffer for encoded value
+ */
+auto encode(std::string_view input, char* output) -> void;
+
+/**
+ * @brief Decode a base64 encoded string
+ * 
+ * @param input Base64 input text
+ * @param output Target buffer for decoded value
+ * @param outlen Output parameter for decoded length
+ * @return true success
+ * @return false failure
+ */
+auto decode(std::string_view input, char* output, std::size_t* outlen) -> bool;
+
+} // namespace