CMake: added a small base64 encoder.

cmake/base64encoder.cpp

@@ -0,0 +1,57 @@
+/*
+Copyright libOpenCOR contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "../extern/modp_b64/modp_b64.h"
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+
+int main(int pArgC, char *pArgV[])
+{
+    // Convert the given file to a base64-encoded string.
+
+    if (pArgC != 2) {
+        std::cerr << "Usage: " << pArgV[0] << " <file>" << std::endl;
+
+        return 1;
+    }
+
+    std::uintmax_t fileSize = std::filesystem::file_size(pArgV[1]);
+    char *buffer = new char[fileSize];
+    std::ifstream file(pArgV[1], std::ios::binary);
+
+    file.read(buffer, fileSize);
+
+    if (!file) {
+        std::cerr << "Error: the file could not be read." << std::endl;
+
+        return 1;
+    }
+
+    file.close();
+
+    char *base64 = new char[modp_b64_encode_len(fileSize)];
+
+    modp_b64_encode(base64, buffer, fileSize);
+
+    std::cout << base64 << std::endl;
+
+    delete[] base64;
+    delete[] buffer;
+
+    return 0;
+}

tests/CMakeLists.txt

@@ -12,6 +12,19 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Generate our base64 encoder.
+
+set(BASE64ENCODER ${CMAKE_BINARY_DIR}/base64encoder)
+
+try_compile(BASE64ENCODER_EXE ${CMAKE_BINARY_DIR}
+            SOURCES ${CMAKE_SOURCE_DIR}/cmake/base64encoder.cpp
+                    ${CMAKE_SOURCE_DIR}/extern/modp_b64/modp_b64.cc
+            COPY_FILE ${BASE64ENCODER})
+
+if(NOT BASE64ENCODER_EXE)
+    message(FATAL_ERROR "base64encoder could not be built...")
+endif()
+
 # Include our different tests.
 
 include(api/file/tests.cmake)