Added basic cmake library script & export/import base library header

CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(base64
+    VERSION 1.0.0
+    DESCRIPTION "Base64 Encoder/Decoder"
+    LANGUAGES C CXX
+)
+
+set(SOURCES
+    base64.cpp
+)
+
+set(HEADERS
+    base64.h
+)
+
+if(BUILD_SHARED_LIBS)
+    add_library(${PROJECT_NAME} SHARED)
+    target_compile_definitions(${PROJECT_NAME} PUBLIC CXXBASE64_EXPORTS)
+else()
+    add_library(${PROJECT_NAME} STATIC)
+    target_compile_definitions(${PROJECT_NAME} PUBLIC CXXBASE64_STATIC_DEFINE)
+endif()
+
+add_library(BASE64::base64 ALIAS ${PROJECT_NAME})
+
+target_include_directories(${PROJECT_NAME} PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
+target_sources(${PROJECT_NAME} PRIVATE ${SOURCES})
+target_sources(${PROJECT_NAME} PRIVATE ${HEADERS})
+
+target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_17)
+
+if(BUILD_SHARED_LIBS)
+    set_target_properties(${PROJECT_NAME} PROPERTIES 
+        CXX_VISIBILITY_PRESET     hidden
+        VISIBILITY_INLINES_HIDDEN ON
+    )
+endif()

base64.h

@@ -6,30 +6,31 @@
 #ifndef BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A
 #define BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A
 
+#include <base64_api.h>
 #include <string>
 
 #if __cplusplus >= 201703L
 #include <string_view>
 #endif  // __cplusplus >= 201703L
 
-std::string base64_encode     (std::string const& s, bool url = false);
-std::string base64_encode_pem (std::string const& s);
-std::string base64_encode_mime(std::string const& s);
+std::string CXXBASE64_API base64_encode     (std::string const& s, bool url = false);
+std::string CXXBASE64_API base64_encode_pem (std::string const& s);
+std::string CXXBASE64_API base64_encode_mime(std::string const& s);
 
-std::string base64_decode(std::string const& s, bool remove_linebreaks = false);
-std::string base64_encode(unsigned char const*, size_t len, bool url = false);
+std::string CXXBASE64_API base64_decode(std::string const& s, bool remove_linebreaks = false);
+std::string CXXBASE64_API base64_encode(unsigned char const*, size_t len, bool url = false);
 
 #if __cplusplus >= 201703L
 //
 // Interface with std::string_view rather than const std::string&
 // Requires C++17
 // Provided by Yannic Bonenberger (https://github.com/Yannic)
 //
-std::string base64_encode     (std::string_view s, bool url = false);
-std::string base64_encode_pem (std::string_view s);
-std::string base64_encode_mime(std::string_view s);
+std::string CXXBASE64_API base64_encode     (std::string_view s, bool url = false);
+std::string CXXBASE64_API base64_encode_pem (std::string_view s);
+std::string CXXBASE64_API base64_encode_mime(std::string_view s);
 
-std::string base64_decode(std::string_view s, bool remove_linebreaks = false);
+std::string CXXBASE64_API base64_decode(std::string_view s, bool remove_linebreaks = false);
 #endif  // __cplusplus >= 201703L
 
 #endif /* BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A */

base64_api.h

@@ -0,0 +1,92 @@
+#ifndef _CXXBASE64_API_H_
+#define _CXXBASE64_API_H_
+
+
+#ifdef CXXBASE64_STATIC_DEFINE /* Define if compiling as a static library (-DCXXBASE64_STATIC_DEFINE) */
+#	define CXXBASE64_API
+#	define CXXBASE64_NO_EXPORT
+#else
+#	ifndef CXXBASE64_API
+#		ifdef CXXBASE64_EXPORTS /* We are building this library */
+#			if defined _WIN32 || defined _WIN64 || defined __CYGWIN__ || defined __MINGW64__
+#				if defined __GNUC__ || defined __clang__
+#					define CXXBASE64_API __attribute__ ((dllexport))
+#				else
+#					define CXXBASE64_API __declspec(dllexport)
+#				endif
+#			else 
+#				if (defined __GNUC__ && __GNUC__ >= 4) || defined __clang__
+#					define CXXBASE64_API __attribute__ ((visibility ("default")))
+#				endif
+#			endif
+#    	else /* We are using this library */
+#			if defined _WIN32 || defined _WIN64 || defined __CYGWIN__ || defined __MINGW64__
+#				if defined __GNUC__ || defined __clang__
+#					define CXXBASE64_API __attribute__ ((dllimport))
+#				else
+#					define CXXBASE64_API __declspec(dllimport)
+#				endif
+#			else 
+#				if defined __GNUC__ && __GNUC__ >= 4
+#					define CXXBASE64_API
+#				endif
+#			endif
+#       endif
+#	else /* Should Only reach here for non-*nix, un-supported platforms */
+#       warning "Platform Unsupported - Either Not a derivative of Unix // Not Windows"
+#		define CXXBASE64_API
+#   endif
+#	ifndef CXXBASE64_NO_EXPORT
+#       if defined __GNUC__ && __GNUC__ >= 4 /* Symbols exported by default on *nix systems */
+#           define CXXBASE64_NO_EXPORT __attribute__((visibility ("hidden")))
+#       else /* (DLL) Symbols on platforms like windows must be exported manually [__declspec(dllexport)] */
+#		    define CXXBASE64_NO_EXPORT 
+#       endif
+#	endif
+#endif
+
+
+#ifndef CXXBASE64_DEPRECATED
+#   if defined(__cplusplus)
+#       if __cplusplus >= 201402L /* [[deprecated]] Supported since C++14 */
+#           define CXXBASE64_DEPRECATED [[deprecated]]
+#           define CXXBASE64_DEPRECATED_MSG(MSG) [[deprecated(MSG)]]
+#       endif
+#   else
+#       if defined _WIN32 || defined _WIN64
+#           if defined __GNUC__ || defined __clang__ /* Cygwin, MinGW32/64 */
+#               define CXXBASE64_DEPRECATED          __attribute__((deprecated))
+#               define CXXBASE64_DEPRECATED_MSG(MSG) __attribute__((deprecated(MSG)))
+#           else
+#               define CXXBASE64_DEPRECATED          __declspec(deprecated)
+#               define CXXBASE64_DEPRECATED_MSG(MSG) __declspec(deprecated(MSG))
+#           endif
+#       elif defined __GNUC__ || defined __clang__
+#           define CXXBASE64_DEPRECATED __attribute__((deprecated))
+#           define CXXBASE64_DEPRECATED_MSG(MSG) __attribute__((deprecated(MSG)))
+#       else /* Should Only reach here for non-*nix, un-supported platforms */
+#           define CXXBASE64_DEPRECATED
+#           define CXXBASE64_DEPRECATED_MSG(MSG)
+#       endif
+#   endif
+#endif
+
+
+#ifndef CXXBASE64_DEPRECATED_EXPORT
+#  define CXXBASE64_DEPRECATED_EXPORT CXXBASE64_API CXXBASE64_DEPRECATED
+#endif
+
+
+#ifndef CXXBASE64_DEPRECATED_NO_EXPORT
+#  define CXXBASE64_DEPRECATED_NO_EXPORT CXXBASE64_NO_EXPORT CXXBASE64_DEPRECATED
+#endif
+
+
+/* NOLINTNEXTLINE(readability-avoid-unconditional-preprocessor-if) */
+#if 0 /* DEFINE_NO_DEPRECATED */
+#  ifndef CXXBASE64_NO_DEPRECATED
+#    define CXXBASE64_NO_DEPRECATED
+#  endif
+#endif
+
+#endif /* _CXXBASE64_API_H_ */