magic: implement file processing

1 files changed, 12 insertions, 0 deletions

diff --git a/cabinet/magic.cpp b/cabinet/magic.cpp
index 96e212f..b5c1aaa 100644
--- a/cabinet/magic.cpp
+++ b/cabinet/magic.cpp
@@ -4,6 +4,8 @@
 
 #include <cerrno>
 #include <expected>
+#include <filesystem>
+#include <string>
 #include <string_view>
 #include <system_error>
 #include <utility>
@@ -51,6 +53,16 @@ namespace cab
     return *this;
   }
 
+  auto magic::process(std::filesystem::path path) -> std::expected<std::string, std::string>
+  {
+    auto result = ::magic_file(m_cookie, path.native().c_str());
+    if (!result)
+    {
+      return std::unexpected{std::string{::magic_error(m_cookie)}};
+    }
+    return result;
+  }
+
   auto swap(magic & lhs, magic & rhs) noexcept -> void
   {
     auto temp = std::move(lhs);