First merge attempt (many PSP tunings are missing, as they are outdated now)

engine/platform/psp/fsh_psp.h

@@ -0,0 +1,37 @@
+/*
+fsh_psp.h - PSP filesystem helper header
+Copyright (C) 2022 Sergey Galushko
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+#ifndef FSH_PSP_H
+#define FSH_PSP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+typedef struct fsh_handle_s	fsh_handle_t;
+
+int FSH_AddFilePathWs( fsh_handle_t *handle, const char *path, int size );
+#define FSH_AddFilePath( handle, path ) FSH_AddFilePathWs(handle, path, -2 )
+int FSH_RemoveFilePath( fsh_handle_t *handle, const char *path );
+int FSH_RenameFilePath( fsh_handle_t *handle, const char *oldname, const char *newname );
+int FSH_FindSize( fsh_handle_t *handle, const char *path );
+int FSH_Find( fsh_handle_t *handle, const char *path );
+fsh_handle_t *FSH_Create( const char *path, int maxfiles );
+void FSH_Free( fsh_handle_t *handle );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // P5RAM_PSP_H