feat: add ada::idna methods to c api

Author: anonrig

include/ada_c.h

@@ -97,4 +97,8 @@ bool ada_has_search(ada_url result);
 // returns a pointer to the internal url_aggregator::url_components
 const ada_url_components* ada_get_components(ada_url result);
 
+// idna methods
+ada_owned_string ada_idna_to_unicode(const char* input, size_t length);
+ada_owned_string ada_idna_to_ascii(const char* input, size_t length);
+
 #endif  // ADA_C_H

src/ada_c.cpp

@@ -369,4 +369,23 @@ const ada_url_components* ada_get_components(ada_url result) noexcept {
   }
   return reinterpret_cast<const ada_url_components*>(&r->get_components());
 }
+
+ada_owned_string ada_idna_to_unicode(const char* input, size_t length) {
+  std::string out = ada::idna::to_unicode(std::string_view(input, length));
+  ada_owned_string owned{};
+  owned.length = out.length();
+  owned.data = new char[owned.length];
+  memcpy((void*)owned.data, out.data(), owned.length);
+  return owned;
+}
+
+ada_owned_string ada_idna_to_ascii(const char* input, size_t length) {
+  std::string out = ada::idna::to_ascii(std::string_view(input, length));
+  ada_owned_string owned{};
+  owned.length = out.size();
+  owned.data = new char[owned.length];
+  memcpy((void*)owned.data, out.data(), owned.length);
+  return owned;
+}
+
 }  // extern "C"

tests/ada_c.cpp

@@ -135,3 +135,19 @@ TEST(ada_c, ada_url_components) {
 
   SUCCEED();
 }
+
+TEST(ada_c, ada_idna) {
+  std::string_view ascii_input = "straße.de";
+  std::string_view unicode_input = "xn--strae-oqa.de";
+  ada_owned_string ascii =
+      ada_idna_to_ascii(ascii_input.data(), ascii_input.length());
+  ASSERT_EQ(std::string_view(ascii.data, ascii.length), unicode_input);
+
+  ada_owned_string unicode =
+      ada_idna_to_unicode(unicode_input.data(), unicode_input.length());
+  ASSERT_EQ(std::string_view(unicode.data, unicode.length), ascii_input);
+
+  ada_free_owned_string(ascii);
+  ada_free_owned_string(unicode);
+  SUCCEED();
+}