--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/foosdk/sdk/foobar2000/SDK/file_info_const_impl.h	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,85 @@
+#pragma once
+#include "file_info.h"
+
+class file_info_readonly : public file_info {
+	[[noreturn]] static void verboten() { FB2K_BugCheck(); }
+protected:
+	void		set_length(double) override { verboten(); }
+	void		set_replaygain(const replaygain_info &) override { verboten(); }
+
+
+	t_size		meta_set_ex(const char *, t_size, const char *, t_size) override { verboten(); }
+	void		meta_insert_value_ex(t_size, t_size, const char *, t_size) override { verboten(); }
+	void		meta_remove_mask(const bit_array &) override { verboten(); }
+	void		meta_reorder(const t_size *) override { verboten(); }
+	void		meta_remove_values(t_size, const bit_array &) override { verboten(); }
+	void		meta_modify_value_ex(t_size, t_size, const char *, t_size) override { verboten(); }
+
+	t_size		info_set_ex(const char *, t_size, const char *, t_size) override { verboten(); }
+	void		info_remove_mask(const bit_array &) override { verboten(); }
+
+	t_size		meta_set_nocheck_ex(const char *, t_size, const char *, t_size) override { verboten(); }
+	t_size		info_set_nocheck_ex(const char *, t_size, const char *, t_size) override { verboten(); }
+};
+
+#define __file_info_const_impl_have_hintmap__
+
+//! Special implementation of file_info that implements only const and copy methods. The difference between this and regular file_info_impl is amount of resources used and speed of the copy operation.
+class file_info_const_impl : public file_info_readonly
+{
+public:
+	file_info_const_impl(const file_info & p_source) {copy(p_source);}
+	file_info_const_impl(const file_info_const_impl & p_source) {copy(p_source);}
+	file_info_const_impl() {m_meta_count = m_info_count = 0; m_length = 0; m_replaygain.reset();}
+
+	double		get_length() const {return m_length;}
+	
+	t_size		meta_get_count() const {return m_meta_count;}
+	const char*	meta_enum_name(t_size p_index) const {return m_meta[p_index].m_name;}
+	t_size		meta_enum_value_count(t_size p_index) const;
+	const char*	meta_enum_value(t_size p_index,t_size p_value_number) const;
+	t_size		meta_find_ex(const char * p_name,t_size p_name_length) const;
+
+	t_size		info_get_count() const {return m_info_count;}
+	const char*	info_enum_name(t_size p_index) const {return m_info[p_index].m_name;}
+	const char*	info_enum_value(t_size p_index) const {return m_info[p_index].m_value;}
+
+
+	const file_info_const_impl & operator=(const file_info & p_source) {copy(p_source); return *this;}
+	const file_info_const_impl & operator=(const file_info_const_impl & p_source) {copy(p_source); return *this;}
+	void copy(const file_info & p_source);
+	void reset();
+
+	replaygain_info	get_replaygain() const {return m_replaygain;}
+	
+public:
+	struct meta_entry {
+		const char * m_name;
+		t_size m_valuecount;
+		const char * const * m_valuemap;
+	};
+
+	struct info_entry {
+		const char * m_name;
+		const char * m_value;
+	};
+
+#ifdef __file_info_const_impl_have_hintmap__
+	typedef t_uint32 t_index;
+	enum {hintmap_cutoff = 20};
+#endif//__file_info_const_impl_have_hintmap__
+private:
+	pfc::array_t<char> m_buffer;
+	t_index m_meta_count;
+	t_index m_info_count;
+	
+	const meta_entry * m_meta;
+	const info_entry * m_info;
+
+#ifdef __file_info_const_impl_have_hintmap__
+	const t_index * m_hintmap;
+#endif
+
+	double m_length;
+	replaygain_info m_replaygain;
+};