cppcodec: add package (#3887)

packages/c/cppcodec/xmake.lua

@@ -0,0 +1,23 @@
+package("cppcodec")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/tplgy/cppcodec")
+    set_description("Header-only C++11 library to encode/decode base64, base64url, base32, base32hex and hex (a.k.a. base16) as specified in RFC 4648, plus Crockford's base32. MIT licensed with consistent, flexible API.")
+    set_license("MIT")
+
+    add_urls("https://github.com/tplgy/cppcodec.git")
+
+    add_versions("2022.09.07", "8019b8b580f8573c33c50372baec7039dfe5a8ce")
+
+    on_install(function (package)
+        os.vcp("cppcodec", package:installdir("include"))
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <cppcodec/base64_rfc4648.hpp>
+            using base64 = cppcodec::base64_rfc4648;
+            void test() {
+                std::vector<uint8_t> decoded = base64::decode("YW55IGNhcm5hbCBwbGVhc3VyZQ==");
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)