void psppire_case_file_sort (PsppireCaseFile *cf, struct case_ordering *);
gboolean psppire_case_file_get_case (const PsppireCaseFile *cf, gint casenum,
struct ccase *c);
void psppire_case_file_sort (PsppireCaseFile *cf, struct case_ordering *);
gboolean psppire_case_file_get_case (const PsppireCaseFile *cf, gint casenum,
struct ccase *c);