rename: libbase -> libbasen

include/basen/hex.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <cstdint>
+#include <span>
+#include <string>
+#include <vector>
+
+namespace hex
+{
+    extern const char digits[17];
+    extern const int8_t map[256];
+
+    bool isValid(const char *str, uint64_t str_size) noexcept;
+    bool isValid(std::string_view str) noexcept;
+
+    uint64_t sizeEncoded(std::span<const uint8_t> data);
+    uint64_t sizeDecoded(std::string_view str) noexcept;
+
+    void encode(const uint8_t *data, uint64_t data_size, char *str, uint64_t str_size);
+    std::string encode(std::span<const uint8_t> data) noexcept;
+
+    void decode(const char *str, uint64_t str_size, uint8_t *data, uint64_t data_size);
+    std::vector<uint8_t> decode(std::string_view str) noexcept;
+}