FindIconv: Add the FindIconv module.

This module provides abstraction over the various ways POSIX platforms
handle the iconv calls defined in POSIX.1-2001 and later versions.

2 files changed, 66 insertions, 0 deletions

diff --git a/Tests/FindIconv/Test/CMakeLists.txt b/Tests/FindIconv/Test/CMakeLists.txt
new file mode 100644
index 0000000..c59adb3
--- /dev/null
+++ b/Tests/FindIconv/Test/CMakeLists.txt
@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.10)
+project(TestFindIconv CXX)
+include(CTest)
+
+find_package(Iconv REQUIRED)
+
+add_executable(test_iconv_tgt main.cxx)
+target_link_libraries(test_iconv_tgt Iconv::Iconv)
+add_test(NAME test_iconv_tgt COMMAND test_iconv_tgt)
+
+add_executable(test_iconv_var main.cxx)
+target_include_directories(test_iconv_var PRIVATE ${Iconv_INCLUDE_DIRS})
+target_link_libraries(test_iconv_var PRIVATE ${Iconv_LIBRARIES})
+add_test(NAME test_iconv_var COMMAND test_iconv_var)
diff --git a/Tests/FindIconv/Test/main.cxx b/Tests/FindIconv/Test/main.cxx
new file mode 100644
index 0000000..415ee37
--- /dev/null
+++ b/Tests/FindIconv/Test/main.cxx
@@ -0,0 +1,52 @@
+extern "C" {
+#include <iconv.h>
+}
+#include <array>
+#include <cstddef>
+#include <cstdlib>
+#include <iostream>
+#include <string>
+#include <system_error>
+
+class iconv_desc
+{
+private:
+  iconv_t iconvd_;
+
+public:
+  iconv_desc(const std::string& tocode, const std::string& fromcode)
+  {
+    iconvd_ = iconv_open(tocode.c_str(), fromcode.c_str());
+    if (iconvd_ == reinterpret_cast<iconv_t>(-1))
+      throw std::system_error(errno, std::system_category());
+  }
+
+  ~iconv_desc() { iconv_close(iconvd_); }
+
+  operator iconv_t() { return this->iconvd_; }
+};
+
+int main()
+{
+  try {
+    auto conv_d = iconv_desc{ "ISO-8859-1", "UTF-8" };
+    auto from_str = std::array<char, 10>{ u8"a\xC3\xA4o\xC3\xB6u\xC3\xBC" };
+    auto to_str = std::array<char, 7>{};
+
+    auto from_str_ptr = from_str.data();
+    auto from_len = from_str.size();
+    auto to_str_ptr = to_str.data();
+    auto to_len = to_str.size();
+    const auto iconv_ret =
+      iconv(conv_d, &from_str_ptr, &from_len, &to_str_ptr, &to_len);
+    if (iconv_ret == static_cast<std::size_t>(-1))
+      throw std::system_error(errno, std::system_category());
+    std::cout << '\'' << from_str.data() << "\' converted to \'"
+              << to_str.data() << '\'' << std::endl;
+    return EXIT_SUCCESS;
+  } catch (const std::system_error& ex) {
+    std::cerr << "ERROR: " << ex.code() << '\n'
+              << ex.code().message() << std::endl;
+  }
+  return EXIT_FAILURE;
+}